tests/suites/test_suite_psa_crypto.function

/* BEGIN_HEADER */
#include <stdint.h>

#include "mbedtls/asn1.h"
#include "mbedtls/asn1write.h"
#include "mbedtls/oid.h"
#include "common.h"

/* For MBEDTLS_CTR_DRBG_MAX_REQUEST, knowing that psa_generate_random()
 * uses mbedtls_ctr_drbg internally. */
#include "mbedtls/ctr_drbg.h"

#include "psa/crypto.h"
#include "psa_crypto_slot_management.h"

#include "test/asn1_helpers.h"
#include "test/psa_crypto_helpers.h"
#include "test/psa_exercise_key.h"

/* If this comes up, it's a bug in the test code or in the test data. */
#define UNUSED 0xdeadbeef

/* Assert that an operation is (not) active.
 * This serves as a proxy for checking if the operation is aborted. */
#define ASSERT_OPERATION_IS_ACTIVE(operation) TEST_ASSERT(operation.id != 0)
#define ASSERT_OPERATION_IS_INACTIVE(operation) TEST_ASSERT(operation.id == 0)

/** An invalid export length that will never be set by psa_export_key(). */
static const size_t INVALID_EXPORT_LENGTH = ~0U;

/** Test if a buffer contains a constant byte value.
 *
 * `mem_is_char(buffer, c, size)` is true after `memset(buffer, c, size)`.
 *
 * \param buffer    Pointer to the beginning of the buffer.
 * \param c         Expected value of every byte.
 * \param size      Size of the buffer in bytes.
 *
 * \return          1 if the buffer is all-bits-zero.
 * \return          0 if there is at least one nonzero byte.
 */
static int mem_is_char(void *buffer, unsigned char c, size_t size)
{
    size_t i;
    for (i = 0; i < size; i++) {
        if (((unsigned char *) buffer)[i] != c) {
            return 0;
        }
    }
    return 1;
}
#if defined(MBEDTLS_ASN1_WRITE_C)
/* Write the ASN.1 INTEGER with the value 2^(bits-1)+x backwards from *p. */
static int asn1_write_10x(unsigned char **p,
                          unsigned char *start,
                          size_t bits,
                          unsigned char x)
{
    int ret;
    int len = bits / 8 + 1;
    if (bits == 0) {
        return MBEDTLS_ERR_ASN1_INVALID_DATA;
    }
    if (bits <= 8 && x >= 1 << (bits - 1)) {
        return MBEDTLS_ERR_ASN1_INVALID_DATA;
    }
    if (*p < start || *p - start < (ptrdiff_t) len) {
        return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL;
    }
    *p -= len;
    (*p)[len-1] = x;
    if (bits % 8 == 0) {
        (*p)[1] |= 1;
    } else {
        (*p)[0] |= 1 << (bits % 8);
    }
    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len));
    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start,
                                                     MBEDTLS_ASN1_INTEGER));
    return len;
}

static int construct_fake_rsa_key(unsigned char *buffer,
                                  size_t buffer_size,
                                  unsigned char **p,
                                  size_t bits,
                                  int keypair)
{
    size_t half_bits = (bits + 1) / 2;
    int ret;
    int len = 0;
    /* Construct something that looks like a DER encoding of
     * as defined by PKCS#1 v2.2 (RFC 8017) section A.1.2:
     *   RSAPrivateKey ::= SEQUENCE {
     *       version           Version,
     *       modulus           INTEGER,  -- n
     *       publicExponent    INTEGER,  -- e
     *       privateExponent   INTEGER,  -- d
     *       prime1            INTEGER,  -- p
     *       prime2            INTEGER,  -- q
     *       exponent1         INTEGER,  -- d mod (p-1)
     *       exponent2         INTEGER,  -- d mod (q-1)
     *       coefficient       INTEGER,  -- (inverse of q) mod p
     *       otherPrimeInfos   OtherPrimeInfos OPTIONAL
     *   }
     * Or, for a public key, the same structure with only
     * version, modulus and publicExponent.
     */
    *p = buffer + buffer_size;
    if (keypair) {
        MBEDTLS_ASN1_CHK_ADD(len,  /* pq */
                             asn1_write_10x(p, buffer, half_bits, 1));
        MBEDTLS_ASN1_CHK_ADD(len,  /* dq */
                             asn1_write_10x(p, buffer, half_bits, 1));
        MBEDTLS_ASN1_CHK_ADD(len,  /* dp */
                             asn1_write_10x(p, buffer, half_bits, 1));
        MBEDTLS_ASN1_CHK_ADD(len,  /* q */
                             asn1_write_10x(p, buffer, half_bits, 1));
        MBEDTLS_ASN1_CHK_ADD(len,  /* p != q to pass mbedtls sanity checks */
                             asn1_write_10x(p, buffer, half_bits, 3));
        MBEDTLS_ASN1_CHK_ADD(len,  /* d */
                             asn1_write_10x(p, buffer, bits, 1));
    }
    MBEDTLS_ASN1_CHK_ADD(len,  /* e = 65537 */
                         asn1_write_10x(p, buffer, 17, 1));
    MBEDTLS_ASN1_CHK_ADD(len,  /* n */
                         asn1_write_10x(p, buffer, bits, 1));
    if (keypair) {
        MBEDTLS_ASN1_CHK_ADD(len,  /* version = 0 */
                             mbedtls_asn1_write_int(p, buffer, 0));
    }
    MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buffer, len));
    {
        const unsigned char tag =
            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE;
        MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buffer, tag));
    }
    return len;
}
#endif /* MBEDTLS_ASN1_WRITE_C */

int exercise_mac_setup(psa_key_type_t key_type,
                       const unsigned char *key_bytes,
                       size_t key_length,
                       psa_algorithm_t alg,
                       psa_mac_operation_t *operation,
                       psa_status_t *status)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_bytes, key_length, &key));

    *status = psa_mac_sign_setup(operation, key, alg);
    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT(psa_mac_abort(operation));
    /* If setup failed, reproduce the failure, so that the caller can
     * test the resulting state of the operation object. */
    if (*status != PSA_SUCCESS) {
        TEST_EQUAL(psa_mac_sign_setup(operation, key, alg), *status);
    }

    psa_destroy_key(key);
    return 1;

exit:
    psa_destroy_key(key);
    return 0;
}

int exercise_cipher_setup(psa_key_type_t key_type,
                          const unsigned char *key_bytes,
                          size_t key_length,
                          psa_algorithm_t alg,
                          psa_cipher_operation_t *operation,
                          psa_status_t *status)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_bytes, key_length, &key));

    *status = psa_cipher_encrypt_setup(operation, key, alg);
    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT(psa_cipher_abort(operation));
    /* If setup failed, reproduce the failure, so that the caller can
     * test the resulting state of the operation object. */
    if (*status != PSA_SUCCESS) {
        TEST_EQUAL(psa_cipher_encrypt_setup(operation, key, alg),
                   *status);
    }

    psa_destroy_key(key);
    return 1;

exit:
    psa_destroy_key(key);
    return 0;
}

static int test_operations_on_invalid_key(mbedtls_svc_key_id_t key)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(1, 0x6964);
    uint8_t buffer[1];
    size_t length;
    int ok = 0;

    psa_set_key_id(&attributes, key_id);
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, PSA_ALG_CTR);
    psa_set_key_type(&attributes, PSA_KEY_TYPE_AES);
    TEST_EQUAL(psa_get_key_attributes(key, &attributes),
               PSA_ERROR_INVALID_HANDLE);
    TEST_EQUAL(
        MBEDTLS_SVC_KEY_ID_GET_KEY_ID(psa_get_key_id(&attributes)), 0);
    TEST_EQUAL(
        MBEDTLS_SVC_KEY_ID_GET_OWNER_ID(psa_get_key_id(&attributes)), 0);
    TEST_EQUAL(psa_get_key_lifetime(&attributes), 0);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), 0);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), 0);
    TEST_EQUAL(psa_get_key_type(&attributes), 0);
    TEST_EQUAL(psa_get_key_bits(&attributes), 0);

    TEST_EQUAL(psa_export_key(key, buffer, sizeof(buffer), &length),
               PSA_ERROR_INVALID_HANDLE);
    TEST_EQUAL(psa_export_public_key(key,
                                     buffer, sizeof(buffer), &length),
               PSA_ERROR_INVALID_HANDLE);

    ok = 1;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    return ok;
}

/* Assert that a key isn't reported as having a slot number. */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
#define ASSERT_NO_SLOT_NUMBER(attributes)                             \
    do                                                                  \
    {                                                                   \
        psa_key_slot_number_t ASSERT_NO_SLOT_NUMBER_slot_number;        \
        TEST_EQUAL(psa_get_key_slot_number(                            \
                       attributes,                                     \
                       &ASSERT_NO_SLOT_NUMBER_slot_number),           \
                   PSA_ERROR_INVALID_ARGUMENT);                       \
    }                                                                   \
    while (0)
#else /* MBEDTLS_PSA_CRYPTO_SE_C */
#define ASSERT_NO_SLOT_NUMBER(attributes)     \
    ((void) 0)
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */

/* An overapproximation of the amount of storage needed for a key of the
 * given type and with the given content. The API doesn't make it easy
 * to find a good value for the size. The current implementation doesn't
 * care about the value anyway. */
#define KEY_BITS_FROM_DATA(type, data)        \
    (data)->len

typedef enum {
    IMPORT_KEY = 0,
    GENERATE_KEY = 1,
    DERIVE_KEY = 2
} generate_method;

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PSA_CRYPTO_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void static_checks()
{
    size_t max_truncated_mac_size =
        PSA_ALG_MAC_TRUNCATION_MASK >> PSA_MAC_TRUNCATION_OFFSET;

    /* Check that the length for a truncated MAC always fits in the algorithm
     * encoding. The shifted mask is the maximum truncated value. The
     * untruncated algorithm may be one byte larger. */
    TEST_LE_U(PSA_MAC_MAX_SIZE, 1 + max_truncated_mac_size);

#if defined(MBEDTLS_TEST_DEPRECATED)
    /* Check deprecated constants. */
    TEST_EQUAL(PSA_ERROR_UNKNOWN_ERROR, PSA_ERROR_GENERIC_ERROR);
    TEST_EQUAL(PSA_ERROR_OCCUPIED_SLOT, PSA_ERROR_ALREADY_EXISTS);
    TEST_EQUAL(PSA_ERROR_EMPTY_SLOT, PSA_ERROR_DOES_NOT_EXIST);
    TEST_EQUAL(PSA_ERROR_INSUFFICIENT_CAPACITY, PSA_ERROR_INSUFFICIENT_DATA);
    TEST_EQUAL(PSA_ERROR_TAMPERING_DETECTED, PSA_ERROR_CORRUPTION_DETECTED);
    TEST_EQUAL(PSA_KEY_USAGE_SIGN, PSA_KEY_USAGE_SIGN_HASH);
    TEST_EQUAL(PSA_KEY_USAGE_VERIFY, PSA_KEY_USAGE_VERIFY_HASH);
    TEST_EQUAL(PSA_ASYMMETRIC_SIGNATURE_MAX_SIZE, PSA_SIGNATURE_MAX_SIZE);

    TEST_EQUAL(PSA_ECC_CURVE_SECP160K1, PSA_ECC_FAMILY_SECP_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP192K1, PSA_ECC_FAMILY_SECP_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP224K1, PSA_ECC_FAMILY_SECP_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP256K1, PSA_ECC_FAMILY_SECP_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP160R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP192R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP224R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP256R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP384R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP521R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP160R2, PSA_ECC_FAMILY_SECP_R2);
    TEST_EQUAL(PSA_ECC_CURVE_SECT163K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT233K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT239K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT283K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT409K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT571K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT163R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT193R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT233R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT283R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT409R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT571R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT163R2, PSA_ECC_FAMILY_SECT_R2);
    TEST_EQUAL(PSA_ECC_CURVE_SECT193R2, PSA_ECC_FAMILY_SECT_R2);
    TEST_EQUAL(PSA_ECC_CURVE_BRAINPOOL_P256R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1);
    TEST_EQUAL(PSA_ECC_CURVE_BRAINPOOL_P384R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1);
    TEST_EQUAL(PSA_ECC_CURVE_BRAINPOOL_P512R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1);
    TEST_EQUAL(PSA_ECC_CURVE_CURVE25519, PSA_ECC_FAMILY_MONTGOMERY);
    TEST_EQUAL(PSA_ECC_CURVE_CURVE448, PSA_ECC_FAMILY_MONTGOMERY);

    TEST_EQUAL(PSA_ECC_CURVE_SECP_K1, PSA_ECC_FAMILY_SECP_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP_R1, PSA_ECC_FAMILY_SECP_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECP_R2, PSA_ECC_FAMILY_SECP_R2);
    TEST_EQUAL(PSA_ECC_CURVE_SECT_K1, PSA_ECC_FAMILY_SECT_K1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT_R1, PSA_ECC_FAMILY_SECT_R1);
    TEST_EQUAL(PSA_ECC_CURVE_SECT_R2, PSA_ECC_FAMILY_SECT_R2);
    TEST_EQUAL(PSA_ECC_CURVE_BRAINPOOL_P_R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1);
    TEST_EQUAL(PSA_ECC_CURVE_MONTGOMERY, PSA_ECC_FAMILY_MONTGOMERY);

    TEST_EQUAL(PSA_DH_GROUP_FFDHE2048, PSA_DH_FAMILY_RFC7919);
    TEST_EQUAL(PSA_DH_GROUP_FFDHE3072, PSA_DH_FAMILY_RFC7919);
    TEST_EQUAL(PSA_DH_GROUP_FFDHE4096, PSA_DH_FAMILY_RFC7919);
    TEST_EQUAL(PSA_DH_GROUP_FFDHE6144, PSA_DH_FAMILY_RFC7919);
    TEST_EQUAL(PSA_DH_GROUP_FFDHE8192, PSA_DH_FAMILY_RFC7919);

    TEST_EQUAL(PSA_DH_GROUP_RFC7919, PSA_DH_FAMILY_RFC7919);
    TEST_EQUAL(PSA_DH_GROUP_CUSTOM, PSA_DH_FAMILY_CUSTOM);
#endif
}
/* END_CASE */

/* BEGIN_CASE */
void import_with_policy(int type_arg,
                        int usage_arg, int alg_arg,
                        int expected_status_arg)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_key_usage_t usage = usage_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    const uint8_t key_material[16] = { 0 };
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_type(&attributes, type);
    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);

    status = psa_import_key(&attributes,
                            key_material, sizeof(key_material),
                            &key);
    TEST_EQUAL(status, expected_status);
    if (status != PSA_SUCCESS) {
        goto exit;
    }

    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), type);
    TEST_EQUAL(psa_get_key_usage_flags(&got_attributes),
               mbedtls_test_update_key_usage_flags(usage));
    TEST_EQUAL(psa_get_key_algorithm(&got_attributes), alg);
    ASSERT_NO_SLOT_NUMBER(&got_attributes);

    PSA_ASSERT(psa_destroy_key(key));
    test_operations_on_invalid_key(key);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void import_with_data(data_t *data, int type_arg,
                      int attr_bits_arg,
                      int expected_status_arg)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t attr_bits = attr_bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_type(&attributes, type);
    psa_set_key_bits(&attributes, attr_bits);

    status = psa_import_key(&attributes, data->x, data->len, &key);
    TEST_EQUAL(status, expected_status);
    if (status != PSA_SUCCESS) {
        goto exit;
    }

    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), type);
    if (attr_bits != 0) {
        TEST_EQUAL(attr_bits, psa_get_key_bits(&got_attributes));
    }
    ASSERT_NO_SLOT_NUMBER(&got_attributes);

    PSA_ASSERT(psa_destroy_key(key));
    test_operations_on_invalid_key(key);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
/* Construct and attempt to import a large unstructured key. */
void import_large_key(int type_arg, int byte_size_arg,
                      int expected_status_arg)
{
    psa_key_type_t type = type_arg;
    size_t byte_size = byte_size_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_status = expected_status_arg;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    uint8_t *buffer = NULL;
    size_t buffer_size = byte_size + 1;
    size_t n;

    /* Skip the test case if the target running the test cannot
     * accommodate large keys due to heap size constraints */
    TEST_CALLOC_OR_SKIP(buffer, buffer_size);
    memset(buffer, 'K', byte_size);

    PSA_ASSERT(psa_crypto_init());

    /* Try importing the key */
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_EXPORT);
    psa_set_key_type(&attributes, type);
    status = psa_import_key(&attributes, buffer, byte_size, &key);
    TEST_ASSUME(status != PSA_ERROR_INSUFFICIENT_MEMORY);
    TEST_EQUAL(status, expected_status);

    if (status == PSA_SUCCESS) {
        PSA_ASSERT(psa_get_key_attributes(key, &attributes));
        TEST_EQUAL(psa_get_key_type(&attributes), type);
        TEST_EQUAL(psa_get_key_bits(&attributes),
                   PSA_BYTES_TO_BITS(byte_size));
        ASSERT_NO_SLOT_NUMBER(&attributes);
        memset(buffer, 0, byte_size + 1);
        PSA_ASSERT(psa_export_key(key, buffer, byte_size, &n));
        for (n = 0; n < byte_size; n++) {
            TEST_EQUAL(buffer[n], 'K');
        }
        for (n = byte_size; n < buffer_size; n++) {
            TEST_EQUAL(buffer[n], 0);
        }
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    PSA_DONE();
    mbedtls_free(buffer);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_ASN1_WRITE_C */
/* Import an RSA key with a valid structure (but not valid numbers
 * inside, beyond having sensible size and parity). This is expected to
 * fail for large keys. */
void import_rsa_made_up(int bits_arg, int keypair, int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    size_t bits = bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;
    psa_key_type_t type =
        keypair ? PSA_KEY_TYPE_RSA_KEY_PAIR : PSA_KEY_TYPE_RSA_PUBLIC_KEY;
    size_t buffer_size = /* Slight overapproximations */
                         keypair ? bits * 9 / 16 + 80 : bits / 8 + 20;
    unsigned char *buffer = NULL;
    unsigned char *p;
    int ret;
    size_t length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());
    TEST_CALLOC(buffer, buffer_size);

    TEST_ASSERT((ret = construct_fake_rsa_key(buffer, buffer_size, &p,
                                              bits, keypair)) >= 0);
    length = ret;

    /* Try importing the key */
    psa_set_key_type(&attributes, type);
    status = psa_import_key(&attributes, p, length, &key);
    TEST_EQUAL(status, expected_status);

    if (status == PSA_SUCCESS) {
        PSA_ASSERT(psa_destroy_key(key));
    }

exit:
    mbedtls_free(buffer);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void import_export(data_t *data,
                   int type_arg,
                   int usage_arg, int alg_arg,
                   int expected_bits,
                   int export_size_delta,
                   int expected_export_status_arg,
                   /*whether reexport must give the original input exactly*/
                   int canonical_input)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_export_status = expected_export_status_arg;
    psa_status_t status;
    unsigned char *exported = NULL;
    unsigned char *reexported = NULL;
    size_t export_size;
    size_t exported_length = INVALID_EXPORT_LENGTH;
    size_t reexported_length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    export_size = (ptrdiff_t) data->len + export_size_delta;
    TEST_CALLOC(exported, export_size);
    if (!canonical_input) {
        TEST_CALLOC(reexported, export_size);
    }
    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage_arg);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);

    /* Import the key */
    PSA_ASSERT(psa_import_key(&attributes, data->x, data->len, &key));

    /* Test the key information */
    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), type);
    TEST_EQUAL(psa_get_key_bits(&got_attributes), (size_t) expected_bits);
    ASSERT_NO_SLOT_NUMBER(&got_attributes);

    /* Export the key */
    status = psa_export_key(key, exported, export_size, &exported_length);
    TEST_EQUAL(status, expected_export_status);

    /* The exported length must be set by psa_export_key() to a value between 0
     * and export_size. On errors, the exported length must be 0. */
    TEST_ASSERT(exported_length != INVALID_EXPORT_LENGTH);
    TEST_ASSERT(status == PSA_SUCCESS || exported_length == 0);
    TEST_LE_U(exported_length, export_size);

    TEST_ASSERT(mem_is_char(exported + exported_length, 0,
                            export_size - exported_length));
    if (status != PSA_SUCCESS) {
        TEST_EQUAL(exported_length, 0);
        goto destroy;
    }

    /* Run sanity checks on the exported key. For non-canonical inputs,
     * this validates the canonical representations. For canonical inputs,
     * this doesn't directly validate the implementation, but it still helps
     * by cross-validating the test data with the sanity check code. */
    if (!mbedtls_test_psa_exercise_key(key, usage_arg, 0)) {
        goto exit;
    }

    if (canonical_input) {
        TEST_MEMORY_COMPARE(data->x, data->len, exported, exported_length);
    } else {
        mbedtls_svc_key_id_t key2 = MBEDTLS_SVC_KEY_ID_INIT;
        PSA_ASSERT(psa_import_key(&attributes, exported, exported_length,
                                  &key2));
        PSA_ASSERT(psa_export_key(key2,
                                  reexported,
                                  export_size,
                                  &reexported_length));
        TEST_MEMORY_COMPARE(exported, exported_length,
                            reexported, reexported_length);
        PSA_ASSERT(psa_destroy_key(key2));
    }
    TEST_ASSERT(exported_length <=
                PSA_EXPORT_KEY_OUTPUT_SIZE(type,
                                           psa_get_key_bits(&got_attributes)));
    TEST_LE_U(exported_length, PSA_EXPORT_KEY_PAIR_MAX_SIZE);

destroy:
    /* Destroy the key */
    PSA_ASSERT(psa_destroy_key(key));
    test_operations_on_invalid_key(key);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    mbedtls_free(exported);
    mbedtls_free(reexported);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void import_export_public_key(data_t *data,
                              int type_arg,  // key pair or public key
                              int alg_arg,
                              int export_size_delta,
                              int expected_export_status_arg,
                              data_t *expected_public_key)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_export_status = expected_export_status_arg;
    psa_status_t status;
    unsigned char *exported = NULL;
    size_t export_size = expected_public_key->len + export_size_delta;
    size_t exported_length = INVALID_EXPORT_LENGTH;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_EXPORT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);

    /* Import the key */
    PSA_ASSERT(psa_import_key(&attributes, data->x, data->len, &key));

    /* Export the public key */
    TEST_CALLOC(exported, export_size);
    status = psa_export_public_key(key,
                                   exported, export_size,
                                   &exported_length);
    TEST_EQUAL(status, expected_export_status);
    if (status == PSA_SUCCESS) {
        psa_key_type_t public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(type);
        size_t bits;
        PSA_ASSERT(psa_get_key_attributes(key, &attributes));
        bits = psa_get_key_bits(&attributes);
        TEST_LE_U(expected_public_key->len,
                  PSA_EXPORT_KEY_OUTPUT_SIZE(public_type, bits));
        TEST_LE_U(expected_public_key->len,
                  PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(public_type, bits));
        TEST_LE_U(expected_public_key->len,
                  PSA_EXPORT_PUBLIC_KEY_MAX_SIZE);
        TEST_MEMORY_COMPARE(expected_public_key->x, expected_public_key->len,
                            exported, exported_length);
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    mbedtls_free(exported);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void import_and_exercise_key(data_t *data,
                             int type_arg,
                             int bits_arg,
                             int alg_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_usage_t usage = mbedtls_test_psa_usage_to_exercise(type, alg);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);

    /* Import the key */
    PSA_ASSERT(psa_import_key(&attributes, data->x, data->len, &key));

    /* Test the key information */
    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), type);
    TEST_EQUAL(psa_get_key_bits(&got_attributes), bits);

    /* Do something with the key according to its type and permitted usage. */
    if (!mbedtls_test_psa_exercise_key(key, usage, alg)) {
        goto exit;
    }

    PSA_ASSERT(psa_destroy_key(key));
    test_operations_on_invalid_key(key);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void effective_key_attributes(int type_arg, int expected_type_arg,
                              int bits_arg, int expected_bits_arg,
                              int usage_arg, int expected_usage_arg,
                              int alg_arg, int expected_alg_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = type_arg;
    psa_key_type_t expected_key_type = expected_type_arg;
    size_t bits = bits_arg;
    size_t expected_bits = expected_bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t expected_alg = expected_alg_arg;
    psa_key_usage_t usage = usage_arg;
    psa_key_usage_t expected_usage = expected_usage_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    psa_set_key_bits(&attributes, bits);

    PSA_ASSERT(psa_generate_key(&attributes, &key));
    psa_reset_key_attributes(&attributes);

    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    TEST_EQUAL(psa_get_key_type(&attributes), expected_key_type);
    TEST_EQUAL(psa_get_key_bits(&attributes), expected_bits);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), expected_usage);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), expected_alg);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void check_key_policy(int type_arg, int bits_arg,
                      int usage_arg, int alg_arg)
{
    test_effective_key_attributes(type_arg, type_arg, bits_arg, bits_arg,
                                  usage_arg,
                                  mbedtls_test_update_key_usage_flags(usage_arg),
                                  alg_arg, alg_arg);
    goto exit;
}
/* END_CASE */

/* BEGIN_CASE */
void key_attributes_init()
{
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to suppress the Clang warning for the test. */
    psa_key_attributes_t func = psa_key_attributes_init();
    psa_key_attributes_t init = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t zero;

    memset(&zero, 0, sizeof(zero));

    TEST_EQUAL(psa_get_key_lifetime(&func), PSA_KEY_LIFETIME_VOLATILE);
    TEST_EQUAL(psa_get_key_lifetime(&init), PSA_KEY_LIFETIME_VOLATILE);
    TEST_EQUAL(psa_get_key_lifetime(&zero), PSA_KEY_LIFETIME_VOLATILE);

    TEST_EQUAL(psa_get_key_type(&func), 0);
    TEST_EQUAL(psa_get_key_type(&init), 0);
    TEST_EQUAL(psa_get_key_type(&zero), 0);

    TEST_EQUAL(psa_get_key_bits(&func), 0);
    TEST_EQUAL(psa_get_key_bits(&init), 0);
    TEST_EQUAL(psa_get_key_bits(&zero), 0);

    TEST_EQUAL(psa_get_key_usage_flags(&func), 0);
    TEST_EQUAL(psa_get_key_usage_flags(&init), 0);
    TEST_EQUAL(psa_get_key_usage_flags(&zero), 0);

    TEST_EQUAL(psa_get_key_algorithm(&func), 0);
    TEST_EQUAL(psa_get_key_algorithm(&init), 0);
    TEST_EQUAL(psa_get_key_algorithm(&zero), 0);
}
/* END_CASE */

/* BEGIN_CASE */
void mac_key_policy(int policy_usage_arg,
                    int policy_alg_arg,
                    int key_type_arg,
                    data_t *key_data,
                    int exercise_alg_arg,
                    int expected_status_sign_arg,
                    int expected_status_verify_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t policy_alg = policy_alg_arg;
    psa_algorithm_t exercise_alg = exercise_alg_arg;
    psa_key_usage_t policy_usage = policy_usage_arg;
    psa_status_t status;
    psa_status_t expected_status_sign = expected_status_sign_arg;
    psa_status_t expected_status_verify = expected_status_verify_arg;
    unsigned char mac[PSA_MAC_MAX_SIZE];

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    TEST_EQUAL(psa_get_key_usage_flags(&attributes),
               mbedtls_test_update_key_usage_flags(policy_usage));

    status = psa_mac_sign_setup(&operation, key, exercise_alg);
    TEST_EQUAL(status, expected_status_sign);

    /* Calculate the MAC, one-shot case. */
    uint8_t input[128] = { 0 };
    size_t mac_len;
    TEST_EQUAL(psa_mac_compute(key, exercise_alg,
                               input, 128,
                               mac, PSA_MAC_MAX_SIZE, &mac_len),
               expected_status_sign);

    /* Verify correct MAC, one-shot case. */
    status = psa_mac_verify(key, exercise_alg, input, 128,
                            mac, mac_len);

    if (expected_status_sign != PSA_SUCCESS && expected_status_verify == PSA_SUCCESS) {
        TEST_EQUAL(status, PSA_ERROR_INVALID_SIGNATURE);
    } else {
        TEST_EQUAL(status, expected_status_verify);
    }

    psa_mac_abort(&operation);

    memset(mac, 0, sizeof(mac));
    status = psa_mac_verify_setup(&operation, key, exercise_alg);
    TEST_EQUAL(status, expected_status_verify);

exit:
    psa_mac_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_key_policy(int policy_usage_arg,
                       int policy_alg,
                       int key_type,
                       data_t *key_data,
                       int exercise_alg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_usage_t policy_usage = policy_usage_arg;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Check if no key usage flag implication is done */
    TEST_EQUAL(policy_usage,
               mbedtls_test_update_key_usage_flags(policy_usage));

    status = psa_cipher_encrypt_setup(&operation, key, exercise_alg);
    if (policy_alg == exercise_alg &&
        (policy_usage & PSA_KEY_USAGE_ENCRYPT) != 0) {
        PSA_ASSERT(status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }
    psa_cipher_abort(&operation);

    status = psa_cipher_decrypt_setup(&operation, key, exercise_alg);
    if (policy_alg == exercise_alg &&
        (policy_usage & PSA_KEY_USAGE_DECRYPT) != 0) {
        PSA_ASSERT(status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

exit:
    psa_cipher_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void aead_key_policy(int policy_usage_arg,
                     int policy_alg,
                     int key_type,
                     data_t *key_data,
                     int nonce_length_arg,
                     int tag_length_arg,
                     int exercise_alg,
                     int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t policy_usage = policy_usage_arg;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;
    unsigned char nonce[16] = { 0 };
    size_t nonce_length = nonce_length_arg;
    unsigned char tag[16];
    size_t tag_length = tag_length_arg;
    size_t output_length;

    TEST_LE_U(nonce_length, sizeof(nonce));
    TEST_LE_U(tag_length, sizeof(tag));

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Check if no key usage implication is done */
    TEST_EQUAL(policy_usage,
               mbedtls_test_update_key_usage_flags(policy_usage));

    status = psa_aead_encrypt(key, exercise_alg,
                              nonce, nonce_length,
                              NULL, 0,
                              NULL, 0,
                              tag, tag_length,
                              &output_length);
    if ((policy_usage & PSA_KEY_USAGE_ENCRYPT) != 0) {
        TEST_EQUAL(status, expected_status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

    memset(tag, 0, sizeof(tag));
    status = psa_aead_decrypt(key, exercise_alg,
                              nonce, nonce_length,
                              NULL, 0,
                              tag, tag_length,
                              NULL, 0,
                              &output_length);
    if ((policy_usage & PSA_KEY_USAGE_DECRYPT) == 0) {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    } else if (expected_status == PSA_SUCCESS) {
        TEST_EQUAL(status, PSA_ERROR_INVALID_SIGNATURE);
    } else {
        TEST_EQUAL(status, expected_status);
    }

exit:
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encryption_key_policy(int policy_usage_arg,
                                      int policy_alg,
                                      int key_type,
                                      data_t *key_data,
                                      int exercise_alg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t policy_usage = policy_usage_arg;
    psa_status_t status;
    size_t key_bits;
    size_t buffer_length;
    unsigned char *buffer = NULL;
    size_t output_length;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Check if no key usage implication is done */
    TEST_EQUAL(policy_usage,
               mbedtls_test_update_key_usage_flags(policy_usage));

    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);
    buffer_length = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits,
                                                       exercise_alg);
    TEST_CALLOC(buffer, buffer_length);

    status = psa_asymmetric_encrypt(key, exercise_alg,
                                    NULL, 0,
                                    NULL, 0,
                                    buffer, buffer_length,
                                    &output_length);
    if (policy_alg == exercise_alg &&
        (policy_usage & PSA_KEY_USAGE_ENCRYPT) != 0) {
        PSA_ASSERT(status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

    if (buffer_length != 0) {
        memset(buffer, 0, buffer_length);
    }
    status = psa_asymmetric_decrypt(key, exercise_alg,
                                    buffer, buffer_length,
                                    NULL, 0,
                                    buffer, buffer_length,
                                    &output_length);
    if (policy_alg == exercise_alg &&
        (policy_usage & PSA_KEY_USAGE_DECRYPT) != 0) {
        TEST_EQUAL(status, PSA_ERROR_INVALID_PADDING);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    PSA_DONE();
    mbedtls_free(buffer);
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_signature_key_policy(int policy_usage_arg,
                                     int policy_alg,
                                     int key_type,
                                     data_t *key_data,
                                     int exercise_alg,
                                     int payload_length_arg,
                                     int expected_usage_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t policy_usage = policy_usage_arg;
    psa_key_usage_t expected_usage = expected_usage_arg;
    psa_status_t status;
    unsigned char payload[PSA_HASH_MAX_SIZE] = { 1 };
    /* If `payload_length_arg > 0`, `exercise_alg` is supposed to be
     * compatible with the policy and `payload_length_arg` is supposed to be
     * a valid input length to sign. If `payload_length_arg <= 0`,
     * `exercise_alg` is supposed to be forbidden by the policy. */
    int compatible_alg = payload_length_arg > 0;
    size_t payload_length = compatible_alg ? payload_length_arg : 0;
    unsigned char signature[PSA_SIGNATURE_MAX_SIZE] = { 0 };
    size_t signature_length;

    /* Check if all implicit usage flags are deployed
       in the expected usage flags. */
    TEST_EQUAL(expected_usage,
               mbedtls_test_update_key_usage_flags(policy_usage));

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    TEST_EQUAL(psa_get_key_usage_flags(&attributes), expected_usage);

    status = psa_sign_hash(key, exercise_alg,
                           payload, payload_length,
                           signature, sizeof(signature),
                           &signature_length);
    if (compatible_alg && (expected_usage & PSA_KEY_USAGE_SIGN_HASH) != 0) {
        PSA_ASSERT(status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

    memset(signature, 0, sizeof(signature));
    status = psa_verify_hash(key, exercise_alg,
                             payload, payload_length,
                             signature, sizeof(signature));
    if (compatible_alg && (expected_usage & PSA_KEY_USAGE_VERIFY_HASH) != 0) {
        TEST_EQUAL(status, PSA_ERROR_INVALID_SIGNATURE);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

    if (PSA_ALG_IS_SIGN_HASH(exercise_alg) &&
        PSA_ALG_IS_HASH(PSA_ALG_SIGN_GET_HASH(exercise_alg))) {
        status = psa_sign_message(key, exercise_alg,
                                  payload, payload_length,
                                  signature, sizeof(signature),
                                  &signature_length);
        if (compatible_alg && (expected_usage & PSA_KEY_USAGE_SIGN_MESSAGE) != 0) {
            PSA_ASSERT(status);
        } else {
            TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
        }

        memset(signature, 0, sizeof(signature));
        status = psa_verify_message(key, exercise_alg,
                                    payload, payload_length,
                                    signature, sizeof(signature));
        if (compatible_alg && (expected_usage & PSA_KEY_USAGE_VERIFY_MESSAGE) != 0) {
            TEST_EQUAL(status, PSA_ERROR_INVALID_SIGNATURE);
        } else {
            TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
        }
    }

exit:
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_policy(int policy_usage,
                       int policy_alg,
                       int key_type,
                       data_t *key_data,
                       int exercise_alg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_key_derivation_setup(&operation, exercise_alg));

    if (PSA_ALG_IS_TLS12_PRF(exercise_alg) ||
        PSA_ALG_IS_TLS12_PSK_TO_MS(exercise_alg)) {
        PSA_ASSERT(psa_key_derivation_input_bytes(
                       &operation,
                       PSA_KEY_DERIVATION_INPUT_SEED,
                       (const uint8_t *) "", 0));
    }

    status = psa_key_derivation_input_key(&operation,
                                          PSA_KEY_DERIVATION_INPUT_SECRET,
                                          key);

    if (policy_alg == exercise_alg &&
        (policy_usage & PSA_KEY_USAGE_DERIVE) != 0) {
        PSA_ASSERT(status);
    } else {
        TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED);
    }

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void agreement_key_policy(int policy_usage,
                          int policy_alg,
                          int key_type_arg,
                          data_t *key_data,
                          int exercise_alg,
                          int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_key_derivation_setup(&operation, exercise_alg));
    status = mbedtls_test_psa_key_agreement_with_self(&operation, key);

    TEST_EQUAL(status, expected_status);

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void key_policy_alg2(int key_type_arg, data_t *key_data,
                     int usage_arg, int alg_arg, int alg2_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t usage = usage_arg;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t alg2 = alg2_arg;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_enrollment_algorithm(&attributes, alg2);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Update the usage flags to obtain implicit usage flags */
    usage = mbedtls_test_update_key_usage_flags(usage);
    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_usage_flags(&got_attributes), usage);
    TEST_EQUAL(psa_get_key_algorithm(&got_attributes), alg);
    TEST_EQUAL(psa_get_key_enrollment_algorithm(&got_attributes), alg2);

    if (!mbedtls_test_psa_exercise_key(key, usage, alg)) {
        goto exit;
    }
    if (!mbedtls_test_psa_exercise_key(key, usage, alg2)) {
        goto exit;
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void raw_agreement_key_policy(int policy_usage,
                              int policy_alg,
                              int key_type_arg,
                              data_t *key_data,
                              int exercise_alg,
                              int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, policy_usage);
    psa_set_key_algorithm(&attributes, policy_alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    status = mbedtls_test_psa_raw_key_agreement_with_self(exercise_alg, key);

    TEST_EQUAL(status, expected_status);

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void copy_success(int source_usage_arg,
                  int source_alg_arg, int source_alg2_arg,
                  int type_arg, data_t *material,
                  int copy_attributes,
                  int target_usage_arg,
                  int target_alg_arg, int target_alg2_arg,
                  int expected_usage_arg,
                  int expected_alg_arg, int expected_alg2_arg)
{
    psa_key_attributes_t source_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t target_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t expected_usage = expected_usage_arg;
    psa_algorithm_t expected_alg = expected_alg_arg;
    psa_algorithm_t expected_alg2 = expected_alg2_arg;
    mbedtls_svc_key_id_t source_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t target_key = MBEDTLS_SVC_KEY_ID_INIT;
    uint8_t *export_buffer = NULL;

    PSA_ASSERT(psa_crypto_init());

    /* Prepare the source key. */
    psa_set_key_usage_flags(&source_attributes, source_usage_arg);
    psa_set_key_algorithm(&source_attributes, source_alg_arg);
    psa_set_key_enrollment_algorithm(&source_attributes, source_alg2_arg);
    psa_set_key_type(&source_attributes, type_arg);
    PSA_ASSERT(psa_import_key(&source_attributes,
                              material->x, material->len,
                              &source_key));
    PSA_ASSERT(psa_get_key_attributes(source_key, &source_attributes));

    /* Prepare the target attributes. */
    if (copy_attributes) {
        target_attributes = source_attributes;
        /* Set volatile lifetime to reset the key identifier to 0. */
        psa_set_key_lifetime(&target_attributes, PSA_KEY_LIFETIME_VOLATILE);
    }

    if (target_usage_arg != -1) {
        psa_set_key_usage_flags(&target_attributes, target_usage_arg);
    }
    if (target_alg_arg != -1) {
        psa_set_key_algorithm(&target_attributes, target_alg_arg);
    }
    if (target_alg2_arg != -1) {
        psa_set_key_enrollment_algorithm(&target_attributes, target_alg2_arg);
    }

    /* Copy the key. */
    PSA_ASSERT(psa_copy_key(source_key,
                            &target_attributes, &target_key));

    /* Destroy the source to ensure that this doesn't affect the target. */
    PSA_ASSERT(psa_destroy_key(source_key));

    /* Test that the target slot has the expected content and policy. */
    PSA_ASSERT(psa_get_key_attributes(target_key, &target_attributes));
    TEST_EQUAL(psa_get_key_type(&source_attributes),
               psa_get_key_type(&target_attributes));
    TEST_EQUAL(psa_get_key_bits(&source_attributes),
               psa_get_key_bits(&target_attributes));
    TEST_EQUAL(expected_usage, psa_get_key_usage_flags(&target_attributes));
    TEST_EQUAL(expected_alg, psa_get_key_algorithm(&target_attributes));
    TEST_EQUAL(expected_alg2,
               psa_get_key_enrollment_algorithm(&target_attributes));
    if (expected_usage & PSA_KEY_USAGE_EXPORT) {
        size_t length;
        TEST_CALLOC(export_buffer, material->len);
        PSA_ASSERT(psa_export_key(target_key, export_buffer,
                                  material->len, &length));
        TEST_MEMORY_COMPARE(material->x, material->len,
                            export_buffer, length);
    }

    if (!mbedtls_test_psa_exercise_key(target_key, expected_usage, expected_alg)) {
        goto exit;
    }
    if (!mbedtls_test_psa_exercise_key(target_key, expected_usage, expected_alg2)) {
        goto exit;
    }

    PSA_ASSERT(psa_destroy_key(target_key));

exit:
    /*
     * Source and target key attributes may have been returned by
     * psa_get_key_attributes() thus reset them as required.
     */
    psa_reset_key_attributes(&source_attributes);
    psa_reset_key_attributes(&target_attributes);

    PSA_DONE();
    mbedtls_free(export_buffer);
}
/* END_CASE */

/* BEGIN_CASE */
void copy_fail(int source_usage_arg,
               int source_alg_arg, int source_alg2_arg,
               int type_arg, data_t *material,
               int target_type_arg, int target_bits_arg,
               int target_usage_arg,
               int target_alg_arg, int target_alg2_arg,
               int target_id_arg, int target_lifetime_arg,
               int expected_status_arg)
{
    psa_key_attributes_t source_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t target_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t source_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t target_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(1, target_id_arg);

    PSA_ASSERT(psa_crypto_init());

    /* Prepare the source key. */
    psa_set_key_usage_flags(&source_attributes, source_usage_arg);
    psa_set_key_algorithm(&source_attributes, source_alg_arg);
    psa_set_key_enrollment_algorithm(&source_attributes, source_alg2_arg);
    psa_set_key_type(&source_attributes, type_arg);
    PSA_ASSERT(psa_import_key(&source_attributes,
                              material->x, material->len,
                              &source_key));

    /* Prepare the target attributes. */
    psa_set_key_id(&target_attributes, key_id);
    psa_set_key_lifetime(&target_attributes, target_lifetime_arg);
    psa_set_key_type(&target_attributes, target_type_arg);
    psa_set_key_bits(&target_attributes, target_bits_arg);
    psa_set_key_usage_flags(&target_attributes, target_usage_arg);
    psa_set_key_algorithm(&target_attributes, target_alg_arg);
    psa_set_key_enrollment_algorithm(&target_attributes, target_alg2_arg);

    /* Try to copy the key. */
    TEST_EQUAL(psa_copy_key(source_key,
                            &target_attributes, &target_key),
               expected_status_arg);

    PSA_ASSERT(psa_destroy_key(source_key));

exit:
    psa_reset_key_attributes(&source_attributes);
    psa_reset_key_attributes(&target_attributes);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void hash_operation_init()
{
    const uint8_t input[1] = { 0 };
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to suppress the Clang warning for the test. */
    psa_hash_operation_t func = psa_hash_operation_init();
    psa_hash_operation_t init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t zero;

    memset(&zero, 0, sizeof(zero));

    /* A freshly-initialized hash operation should not be usable. */
    TEST_EQUAL(psa_hash_update(&func, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_hash_update(&init, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_hash_update(&zero, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);

    /* A default hash operation should be abortable without error. */
    PSA_ASSERT(psa_hash_abort(&func));
    PSA_ASSERT(psa_hash_abort(&init));
    PSA_ASSERT(psa_hash_abort(&zero));
}
/* END_CASE */

/* BEGIN_CASE */
void hash_setup(int alg_arg,
                int expected_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    status = psa_hash_setup(&operation, alg);
    TEST_EQUAL(status, expected_status);

    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT(psa_hash_abort(&operation));

    /* If setup failed, reproduce the failure, so as to
     * test the resulting state of the operation object. */
    if (status != PSA_SUCCESS) {
        TEST_EQUAL(psa_hash_setup(&operation, alg), status);
    }

    /* Now the operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_HASH_ALG)
    PSA_ASSERT(psa_hash_setup(&operation, KNOWN_SUPPORTED_HASH_ALG));
    PSA_ASSERT(psa_hash_abort(&operation));
#endif

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compute_fail(int alg_arg, data_t *input,
                       int output_size_arg, int expected_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    uint8_t *output = NULL;
    size_t output_size = output_size_arg;
    size_t output_length = INVALID_EXPORT_LENGTH;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    TEST_CALLOC(output, output_size);

    PSA_ASSERT(psa_crypto_init());

    status = psa_hash_compute(alg, input->x, input->len,
                              output, output_size, &output_length);
    TEST_EQUAL(status, expected_status);
    TEST_LE_U(output_length, output_size);

exit:
    mbedtls_free(output);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compare_fail(int alg_arg, data_t *input,
                       data_t *reference_hash,
                       int expected_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    status = psa_hash_compare(alg, input->x, input->len,
                              reference_hash->x, reference_hash->len);
    TEST_EQUAL(status, expected_status);

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compute_compare(int alg_arg, data_t *input,
                          data_t *expected_output)
{
    psa_algorithm_t alg = alg_arg;
    uint8_t output[PSA_HASH_MAX_SIZE + 1];
    size_t output_length = INVALID_EXPORT_LENGTH;
    size_t i;

    PSA_ASSERT(psa_crypto_init());

    /* Compute with tight buffer */
    PSA_ASSERT(psa_hash_compute(alg, input->x, input->len,
                                output, PSA_HASH_LENGTH(alg),
                                &output_length));
    TEST_EQUAL(output_length, PSA_HASH_LENGTH(alg));
    TEST_MEMORY_COMPARE(output, output_length,
                        expected_output->x, expected_output->len);

    /* Compute with larger buffer */
    PSA_ASSERT(psa_hash_compute(alg, input->x, input->len,
                                output, sizeof(output),
                                &output_length));
    TEST_EQUAL(output_length, PSA_HASH_LENGTH(alg));
    TEST_MEMORY_COMPARE(output, output_length,
                        expected_output->x, expected_output->len);

    /* Compare with correct hash */
    PSA_ASSERT(psa_hash_compare(alg, input->x, input->len,
                                output, output_length));

    /* Compare with trailing garbage */
    TEST_EQUAL(psa_hash_compare(alg, input->x, input->len,
                                output, output_length + 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Compare with truncated hash */
    TEST_EQUAL(psa_hash_compare(alg, input->x, input->len,
                                output, output_length - 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Compare with corrupted value */
    for (i = 0; i < output_length; i++) {
        mbedtls_test_set_step(i);
        output[i] ^= 1;
        TEST_EQUAL(psa_hash_compare(alg, input->x, input->len,
                                    output, output_length),
                   PSA_ERROR_INVALID_SIGNATURE);
        output[i] ^= 1;
    }

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_bad_order()
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char input[] = "";
    /* SHA-256 hash of an empty string */
    const unsigned char valid_hash[] = {
        0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
        0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
        0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
    };
    unsigned char hash[sizeof(valid_hash)] = { 0 };
    size_t hash_len;
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;

    PSA_ASSERT(psa_crypto_init());

    /* Call setup twice in a row. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_hash_setup(&operation, alg),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_hash_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call update without calling setup beforehand. */
    TEST_EQUAL(psa_hash_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Check that update calls abort on error. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    operation.id = UINT_MAX;
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_hash_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_hash_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call update after finish. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    PSA_ASSERT(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len));
    TEST_EQUAL(psa_hash_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call verify without calling setup beforehand. */
    TEST_EQUAL(psa_hash_verify(&operation,
                               valid_hash, sizeof(valid_hash)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call verify after finish. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    PSA_ASSERT(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len));
    TEST_EQUAL(psa_hash_verify(&operation,
                               valid_hash, sizeof(valid_hash)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call verify twice in a row. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    PSA_ASSERT(psa_hash_verify(&operation,
                               valid_hash, sizeof(valid_hash)));
    ASSERT_OPERATION_IS_INACTIVE(operation);
    TEST_EQUAL(psa_hash_verify(&operation,
                               valid_hash, sizeof(valid_hash)),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call finish without calling setup beforehand. */
    TEST_EQUAL(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call finish twice in a row. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    PSA_ASSERT(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len));
    TEST_EQUAL(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

    /* Call finish after calling verify. */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    PSA_ASSERT(psa_hash_verify(&operation,
                               valid_hash, sizeof(valid_hash)));
    TEST_EQUAL(psa_hash_finish(&operation,
                               hash, sizeof(hash), &hash_len),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_hash_abort(&operation));

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_verify_bad_args()
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    /* SHA-256 hash of an empty string with 2 extra bytes (0xaa and 0xbb)
     * appended to it */
    unsigned char hash[] = {
        0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
        0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
        0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55, 0xaa, 0xbb
    };
    size_t expected_size = PSA_HASH_LENGTH(alg);
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;

    PSA_ASSERT(psa_crypto_init());

    /* psa_hash_verify with a smaller hash than expected */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_hash_verify(&operation, hash, expected_size - 1),
               PSA_ERROR_INVALID_SIGNATURE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_hash_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* psa_hash_verify with a non-matching hash */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    TEST_EQUAL(psa_hash_verify(&operation, hash + 1, expected_size),
               PSA_ERROR_INVALID_SIGNATURE);

    /* psa_hash_verify with a hash longer than expected */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    TEST_EQUAL(psa_hash_verify(&operation, hash, sizeof(hash)),
               PSA_ERROR_INVALID_SIGNATURE);

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_finish_bad_args()
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    size_t expected_size = PSA_HASH_LENGTH(alg);
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT(psa_crypto_init());

    /* psa_hash_finish with a smaller hash buffer than expected */
    PSA_ASSERT(psa_hash_setup(&operation, alg));
    TEST_EQUAL(psa_hash_finish(&operation,
                               hash, expected_size - 1, &hash_len),
               PSA_ERROR_BUFFER_TOO_SMALL);

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_clone_source_state()
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    psa_hash_operation_t op_source = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_setup = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_finished = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_aborted = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT(psa_crypto_init());
    PSA_ASSERT(psa_hash_setup(&op_source, alg));

    PSA_ASSERT(psa_hash_setup(&op_setup, alg));
    PSA_ASSERT(psa_hash_setup(&op_finished, alg));
    PSA_ASSERT(psa_hash_finish(&op_finished,
                               hash, sizeof(hash), &hash_len));
    PSA_ASSERT(psa_hash_setup(&op_aborted, alg));
    PSA_ASSERT(psa_hash_abort(&op_aborted));

    TEST_EQUAL(psa_hash_clone(&op_source, &op_setup),
               PSA_ERROR_BAD_STATE);

    PSA_ASSERT(psa_hash_clone(&op_source, &op_init));
    PSA_ASSERT(psa_hash_finish(&op_init,
                               hash, sizeof(hash), &hash_len));
    PSA_ASSERT(psa_hash_clone(&op_source, &op_finished));
    PSA_ASSERT(psa_hash_finish(&op_finished,
                               hash, sizeof(hash), &hash_len));
    PSA_ASSERT(psa_hash_clone(&op_source, &op_aborted));
    PSA_ASSERT(psa_hash_finish(&op_aborted,
                               hash, sizeof(hash), &hash_len));

exit:
    psa_hash_abort(&op_source);
    psa_hash_abort(&op_init);
    psa_hash_abort(&op_setup);
    psa_hash_abort(&op_finished);
    psa_hash_abort(&op_aborted);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_clone_target_state()
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    psa_hash_operation_t op_init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_setup = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_finished = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_aborted = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_target = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT(psa_crypto_init());

    PSA_ASSERT(psa_hash_setup(&op_setup, alg));
    PSA_ASSERT(psa_hash_setup(&op_finished, alg));
    PSA_ASSERT(psa_hash_finish(&op_finished,
                               hash, sizeof(hash), &hash_len));
    PSA_ASSERT(psa_hash_setup(&op_aborted, alg));
    PSA_ASSERT(psa_hash_abort(&op_aborted));

    PSA_ASSERT(psa_hash_clone(&op_setup, &op_target));
    PSA_ASSERT(psa_hash_finish(&op_target,
                               hash, sizeof(hash), &hash_len));

    TEST_EQUAL(psa_hash_clone(&op_init, &op_target), PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_hash_clone(&op_finished, &op_target),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_hash_clone(&op_aborted, &op_target),
               PSA_ERROR_BAD_STATE);

exit:
    psa_hash_abort(&op_target);
    psa_hash_abort(&op_init);
    psa_hash_abort(&op_setup);
    psa_hash_abort(&op_finished);
    psa_hash_abort(&op_aborted);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void mac_operation_init()
{
    const uint8_t input[1] = { 0 };

    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to suppress the Clang warning for the test. */
    psa_mac_operation_t func = psa_mac_operation_init();
    psa_mac_operation_t init = PSA_MAC_OPERATION_INIT;
    psa_mac_operation_t zero;

    memset(&zero, 0, sizeof(zero));

    /* A freshly-initialized MAC operation should not be usable. */
    TEST_EQUAL(psa_mac_update(&func,
                              input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_mac_update(&init,
                              input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_mac_update(&zero,
                              input, sizeof(input)),
               PSA_ERROR_BAD_STATE);

    /* A default MAC operation should be abortable without error. */
    PSA_ASSERT(psa_mac_abort(&func));
    PSA_ASSERT(psa_mac_abort(&init));
    PSA_ASSERT(psa_mac_abort(&zero));
}
/* END_CASE */

/* BEGIN_CASE */
void mac_setup(int key_type_arg,
               data_t *key,
               int alg_arg,
               int expected_status_arg)
{
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;
#if defined(KNOWN_SUPPORTED_MAC_ALG)
    const uint8_t smoke_test_key_data[16] = "kkkkkkkkkkkkkkkk";
#endif

    PSA_ASSERT(psa_crypto_init());

    if (!exercise_mac_setup(key_type, key->x, key->len, alg,
                            &operation, &status)) {
        goto exit;
    }
    TEST_EQUAL(status, expected_status);

    /* The operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_MAC_ALG)
    if (!exercise_mac_setup(KNOWN_SUPPORTED_MAC_KEY_TYPE,
                            smoke_test_key_data,
                            sizeof(smoke_test_key_data),
                            KNOWN_SUPPORTED_MAC_ALG,
                            &operation, &status)) {
        goto exit;
    }
    TEST_EQUAL(status, PSA_SUCCESS);
#endif

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_KEY_TYPE_HMAC:PSA_WANT_ALG_HMAC:PSA_WANT_ALG_SHA_256 */
void mac_bad_order()
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = PSA_KEY_TYPE_HMAC;
    psa_algorithm_t alg = PSA_ALG_HMAC(PSA_ALG_SHA_256);
    const uint8_t key_data[] = {
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa
    };
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    uint8_t sign_mac[PSA_MAC_MAX_SIZE + 10] = { 0 };
    size_t sign_mac_length = 0;
    const uint8_t input[] = { 0xbb, 0xbb, 0xbb, 0xbb };
    const uint8_t verify_mac[] = {
        0x74, 0x65, 0x93, 0x8c, 0xeb, 0x1d, 0xb3, 0x76, 0x5a, 0x38, 0xe7, 0xdd,
        0x85, 0xc5, 0xad, 0x4f, 0x07, 0xe7, 0xd5, 0xb2, 0x64, 0xf0, 0x1a, 0x1a,
        0x2c, 0xf9, 0x18, 0xca, 0x59, 0x7e, 0x5d, 0xf6
    };

    PSA_ASSERT(psa_crypto_init());
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data, sizeof(key_data),
                              &key));

    /* Call update without calling setup beforehand. */
    TEST_EQUAL(psa_mac_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call sign finish without calling setup beforehand. */
    TEST_EQUAL(psa_mac_sign_finish(&operation, sign_mac, sizeof(sign_mac),
                                   &sign_mac_length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call verify finish without calling setup beforehand. */
    TEST_EQUAL(psa_mac_verify_finish(&operation,
                                     verify_mac, sizeof(verify_mac)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call setup twice in a row. */
    PSA_ASSERT(psa_mac_sign_setup(&operation, key, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_mac_sign_setup(&operation, key, alg),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_mac_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call update after sign finish. */
    PSA_ASSERT(psa_mac_sign_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    PSA_ASSERT(psa_mac_sign_finish(&operation,
                                   sign_mac, sizeof(sign_mac),
                                   &sign_mac_length));
    TEST_EQUAL(psa_mac_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call update after verify finish. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    PSA_ASSERT(psa_mac_verify_finish(&operation,
                                     verify_mac, sizeof(verify_mac)));
    TEST_EQUAL(psa_mac_update(&operation, input, sizeof(input)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call sign finish twice in a row. */
    PSA_ASSERT(psa_mac_sign_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    PSA_ASSERT(psa_mac_sign_finish(&operation,
                                   sign_mac, sizeof(sign_mac),
                                   &sign_mac_length));
    TEST_EQUAL(psa_mac_sign_finish(&operation,
                                   sign_mac, sizeof(sign_mac),
                                   &sign_mac_length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Call verify finish twice in a row. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    PSA_ASSERT(psa_mac_verify_finish(&operation,
                                     verify_mac, sizeof(verify_mac)));
    TEST_EQUAL(psa_mac_verify_finish(&operation,
                                     verify_mac, sizeof(verify_mac)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_mac_abort(&operation));

    /* Setup sign but try verify. */
    PSA_ASSERT(psa_mac_sign_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_mac_verify_finish(&operation,
                                     verify_mac, sizeof(verify_mac)),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_mac_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Setup verify but try sign. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation, input, sizeof(input)));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_mac_sign_finish(&operation,
                                   sign_mac, sizeof(sign_mac),
                                   &sign_mac_length),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_mac_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    PSA_ASSERT(psa_destroy_key(key));

exit:
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void mac_sign(int key_type_arg,
              data_t *key_data,
              int alg_arg,
              data_t *input,
              data_t *expected_mac)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *actual_mac = NULL;
    size_t mac_buffer_size =
        PSA_MAC_LENGTH(key_type, PSA_BYTES_TO_BITS(key_data->len), alg);
    size_t mac_length = 0;
    const size_t output_sizes_to_test[] = {
        0,
        1,
        expected_mac->len - 1,
        expected_mac->len,
        expected_mac->len + 1,
    };

    TEST_LE_U(mac_buffer_size, PSA_MAC_MAX_SIZE);
    /* We expect PSA_MAC_LENGTH to be exact. */
    TEST_ASSERT(expected_mac->len == mac_buffer_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    for (size_t i = 0; i < ARRAY_LENGTH(output_sizes_to_test); i++) {
        const size_t output_size = output_sizes_to_test[i];
        psa_status_t expected_status =
            (output_size >= expected_mac->len ? PSA_SUCCESS :
             PSA_ERROR_BUFFER_TOO_SMALL);

        mbedtls_test_set_step(output_size);
        TEST_CALLOC(actual_mac, output_size);

        /* Calculate the MAC, one-shot case. */
        TEST_EQUAL(psa_mac_compute(key, alg,
                                   input->x, input->len,
                                   actual_mac, output_size, &mac_length),
                   expected_status);
        if (expected_status == PSA_SUCCESS) {
            TEST_MEMORY_COMPARE(expected_mac->x, expected_mac->len,
                                actual_mac, mac_length);
        }

        if (output_size > 0) {
            memset(actual_mac, 0, output_size);
        }

        /* Calculate the MAC, multi-part case. */
        PSA_ASSERT(psa_mac_sign_setup(&operation, key, alg));
        PSA_ASSERT(psa_mac_update(&operation,
                                  input->x, input->len));
        TEST_EQUAL(psa_mac_sign_finish(&operation,
                                       actual_mac, output_size,
                                       &mac_length),
                   expected_status);
        PSA_ASSERT(psa_mac_abort(&operation));

        if (expected_status == PSA_SUCCESS) {
            TEST_MEMORY_COMPARE(expected_mac->x, expected_mac->len,
                                actual_mac, mac_length);
        }
        mbedtls_free(actual_mac);
        actual_mac = NULL;
    }

exit:
    psa_mac_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
    mbedtls_free(actual_mac);
}
/* END_CASE */

/* BEGIN_CASE */
void mac_verify(int key_type_arg,
                data_t *key_data,
                int alg_arg,
                data_t *input,
                data_t *expected_mac)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *perturbed_mac = NULL;

    TEST_LE_U(expected_mac->len, PSA_MAC_MAX_SIZE);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Verify correct MAC, one-shot case. */
    PSA_ASSERT(psa_mac_verify(key, alg, input->x, input->len,
                              expected_mac->x, expected_mac->len));

    /* Verify correct MAC, multi-part case. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation,
                              input->x, input->len));
    PSA_ASSERT(psa_mac_verify_finish(&operation,
                                     expected_mac->x,
                                     expected_mac->len));

    /* Test a MAC that's too short, one-shot case. */
    TEST_EQUAL(psa_mac_verify(key, alg,
                              input->x, input->len,
                              expected_mac->x,
                              expected_mac->len - 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Test a MAC that's too short, multi-part case. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation,
                              input->x, input->len));
    TEST_EQUAL(psa_mac_verify_finish(&operation,
                                     expected_mac->x,
                                     expected_mac->len - 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Test a MAC that's too long, one-shot case. */
    TEST_CALLOC(perturbed_mac, expected_mac->len + 1);
    memcpy(perturbed_mac, expected_mac->x, expected_mac->len);
    TEST_EQUAL(psa_mac_verify(key, alg,
                              input->x, input->len,
                              perturbed_mac, expected_mac->len + 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Test a MAC that's too long, multi-part case. */
    PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
    PSA_ASSERT(psa_mac_update(&operation,
                              input->x, input->len));
    TEST_EQUAL(psa_mac_verify_finish(&operation,
                                     perturbed_mac,
                                     expected_mac->len + 1),
               PSA_ERROR_INVALID_SIGNATURE);

    /* Test changing one byte. */
    for (size_t i = 0; i < expected_mac->len; i++) {
        mbedtls_test_set_step(i);
        perturbed_mac[i] ^= 1;

        TEST_EQUAL(psa_mac_verify(key, alg,
                                  input->x, input->len,
                                  perturbed_mac, expected_mac->len),
                   PSA_ERROR_INVALID_SIGNATURE);

        PSA_ASSERT(psa_mac_verify_setup(&operation, key, alg));
        PSA_ASSERT(psa_mac_update(&operation,
                                  input->x, input->len));
        TEST_EQUAL(psa_mac_verify_finish(&operation,
                                         perturbed_mac,
                                         expected_mac->len),
                   PSA_ERROR_INVALID_SIGNATURE);
        perturbed_mac[i] ^= 1;
    }

exit:
    psa_mac_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
    mbedtls_free(perturbed_mac);
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_operation_init()
{
    const uint8_t input[1] = { 0 };
    unsigned char output[1] = { 0 };
    size_t output_length;
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to suppress the Clang warning for the test. */
    psa_cipher_operation_t func = psa_cipher_operation_init();
    psa_cipher_operation_t init = PSA_CIPHER_OPERATION_INIT;
    psa_cipher_operation_t zero;

    memset(&zero, 0, sizeof(zero));

    /* A freshly-initialized cipher operation should not be usable. */
    TEST_EQUAL(psa_cipher_update(&func,
                                 input, sizeof(input),
                                 output, sizeof(output),
                                 &output_length),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_cipher_update(&init,
                                 input, sizeof(input),
                                 output, sizeof(output),
                                 &output_length),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_cipher_update(&zero,
                                 input, sizeof(input),
                                 output, sizeof(output),
                                 &output_length),
               PSA_ERROR_BAD_STATE);

    /* A default cipher operation should be abortable without error. */
    PSA_ASSERT(psa_cipher_abort(&func));
    PSA_ASSERT(psa_cipher_abort(&init));
    PSA_ASSERT(psa_cipher_abort(&zero));
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_setup(int key_type_arg,
                  data_t *key,
                  int alg_arg,
                  int expected_status_arg)
{
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_status_t status;
#if defined(KNOWN_SUPPORTED_CIPHER_ALG)
    const uint8_t smoke_test_key_data[16] = "kkkkkkkkkkkkkkkk";
#endif

    PSA_ASSERT(psa_crypto_init());

    if (!exercise_cipher_setup(key_type, key->x, key->len, alg,
                               &operation, &status)) {
        goto exit;
    }
    TEST_EQUAL(status, expected_status);

    /* The operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_CIPHER_ALG)
    if (!exercise_cipher_setup(KNOWN_SUPPORTED_CIPHER_KEY_TYPE,
                               smoke_test_key_data,
                               sizeof(smoke_test_key_data),
                               KNOWN_SUPPORTED_CIPHER_ALG,
                               &operation, &status)) {
        goto exit;
    }
    TEST_EQUAL(status, PSA_SUCCESS);
#endif

exit:
    psa_cipher_abort(&operation);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_KEY_TYPE_AES:PSA_WANT_ALG_CBC_PKCS7 */
void cipher_bad_order()
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = PSA_KEY_TYPE_AES;
    psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    unsigned char iv[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
    const uint8_t key_data[] = {
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa
    };
    const uint8_t text[] = {
        0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
        0xbb, 0xbb, 0xbb, 0xbb
    };
    uint8_t buffer[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
    size_t length = 0;

    PSA_ASSERT(psa_crypto_init());
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_data, sizeof(key_data),
                              &key));

    /* Call encrypt setup twice in a row. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_encrypt_setup(&operation, key, alg),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call decrypt setup twice in a row. */
    PSA_ASSERT(psa_cipher_decrypt_setup(&operation, key, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_decrypt_setup(&operation, key, alg),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Generate an IV without calling setup beforehand. */
    TEST_EQUAL(psa_cipher_generate_iv(&operation,
                                      buffer, sizeof(buffer),
                                      &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Generate an IV twice in a row. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_generate_iv(&operation,
                                      buffer, sizeof(buffer),
                                      &length));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_generate_iv(&operation,
                                      buffer, sizeof(buffer),
                                      &length),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Generate an IV after it's already set. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)));
    TEST_EQUAL(psa_cipher_generate_iv(&operation,
                                      buffer, sizeof(buffer),
                                      &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Set an IV without calling setup beforehand. */
    TEST_EQUAL(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Set an IV after it's already set. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Set an IV after it's already generated. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_generate_iv(&operation,
                                      buffer, sizeof(buffer),
                                      &length));
    TEST_EQUAL(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Call update without calling setup beforehand. */
    TEST_EQUAL(psa_cipher_update(&operation,
                                 text, sizeof(text),
                                 buffer, sizeof(buffer),
                                 &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Call update without an IV where an IV is required. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_update(&operation,
                                 text, sizeof(text),
                                 buffer, sizeof(buffer),
                                 &length),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call update after finish. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)));
    PSA_ASSERT(psa_cipher_finish(&operation,
                                 buffer, sizeof(buffer), &length));
    TEST_EQUAL(psa_cipher_update(&operation,
                                 text, sizeof(text),
                                 buffer, sizeof(buffer),
                                 &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Call finish without calling setup beforehand. */
    TEST_EQUAL(psa_cipher_finish(&operation,
                                 buffer, sizeof(buffer), &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    /* Call finish without an IV where an IV is required. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    /* Not calling update means we are encrypting an empty buffer, which is OK
     * for cipher modes with padding. */
    ASSERT_OPERATION_IS_ACTIVE(operation);
    TEST_EQUAL(psa_cipher_finish(&operation,
                                 buffer, sizeof(buffer), &length),
               PSA_ERROR_BAD_STATE);
    ASSERT_OPERATION_IS_INACTIVE(operation);
    PSA_ASSERT(psa_cipher_abort(&operation));
    ASSERT_OPERATION_IS_INACTIVE(operation);

    /* Call finish twice in a row. */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_set_iv(&operation,
                                 iv, sizeof(iv)));
    PSA_ASSERT(psa_cipher_finish(&operation,
                                 buffer, sizeof(buffer), &length));
    TEST_EQUAL(psa_cipher_finish(&operation,
                                 buffer, sizeof(buffer), &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_abort(&operation));

    PSA_ASSERT(psa_destroy_key(key));

exit:
    psa_cipher_abort(&operation);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_encrypt_fail(int alg_arg,
                         int key_type_arg,
                         data_t *key_data,
                         data_t *input,
                         int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t output_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    if (PSA_ERROR_BAD_STATE != expected_status) {
        PSA_ASSERT(psa_crypto_init());

        psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
        psa_set_key_algorithm(&attributes, alg);
        psa_set_key_type(&attributes, key_type);

        output_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg,
                                                            input->len);
        TEST_CALLOC(output, output_buffer_size);

        PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                                  &key));
    }

    status = psa_cipher_encrypt(key, alg, input->x, input->len, output,
                                output_buffer_size, &output_length);

    TEST_EQUAL(status, expected_status);

exit:
    mbedtls_free(output);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_alg_without_iv(int alg_arg, int key_type_arg, data_t *key_data,
                           data_t *plaintext, data_t *ciphertext)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    uint8_t iv[1] = { 0x5a };
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t output_length, length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    /* Validate size macros */
    TEST_LE_U(ciphertext->len,
              PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext->len));
    TEST_LE_U(PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext->len),
              PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(plaintext->len));
    TEST_LE_U(plaintext->len,
              PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext->len));
    TEST_LE_U(PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext->len),
              PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(ciphertext->len));


    /* Set up key and output buffer */
    psa_set_key_usage_flags(&attributes,
                            PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    output_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg,
                                                        plaintext->len);
    TEST_CALLOC(output, output_buffer_size);

    /* set_iv() is not allowed */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    TEST_EQUAL(psa_cipher_set_iv(&operation, iv, sizeof(iv)),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_decrypt_setup(&operation, key, alg));
    TEST_EQUAL(psa_cipher_set_iv(&operation, iv, sizeof(iv)),
               PSA_ERROR_BAD_STATE);

    /* generate_iv() is not allowed */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    TEST_EQUAL(psa_cipher_generate_iv(&operation, iv, sizeof(iv),
                                      &length),
               PSA_ERROR_BAD_STATE);
    PSA_ASSERT(psa_cipher_decrypt_setup(&operation, key, alg));
    TEST_EQUAL(psa_cipher_generate_iv(&operation, iv, sizeof(iv),
                                      &length),
               PSA_ERROR_BAD_STATE);

    /* Multipart encryption */
    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    output_length = 0;
    length = ~0;
    PSA_ASSERT(psa_cipher_update(&operation,
                                 plaintext->x, plaintext->len,
                                 output, output_buffer_size,
                                 &length));
    TEST_LE_U(length, output_buffer_size);
    output_length += length;
    PSA_ASSERT(psa_cipher_finish(&operation,
                                 mbedtls_buffer_offset(output, output_length),
                                 output_buffer_size - output_length,
                                 &length));
    output_length += length;
    TEST_MEMORY_COMPARE(ciphertext->x, ciphertext->len,
                        output, output_length);

    /* Multipart encryption */
    PSA_ASSERT(psa_cipher_decrypt_setup(&operation, key, alg));
    output_length = 0;
    length = ~0;
    PSA_ASSERT(psa_cipher_update(&operation,
                                 ciphertext->x, ciphertext->len,
                                 output, output_buffer_size,
                                 &length));
    TEST_LE_U(length, output_buffer_size);
    output_length += length;
    PSA_ASSERT(psa_cipher_finish(&operation,
                                 mbedtls_buffer_offset(output, output_length),
                                 output_buffer_size - output_length,
                                 &length));
    output_length += length;
    TEST_MEMORY_COMPARE(plaintext->x, plaintext->len,
                        output, output_length);

    /* One-shot encryption */
    output_length = ~0;
    PSA_ASSERT(psa_cipher_encrypt(key, alg, plaintext->x, plaintext->len,
                                  output, output_buffer_size,
                                  &output_length));
    TEST_MEMORY_COMPARE(ciphertext->x, ciphertext->len,
                        output, output_length);

    /* One-shot decryption */
    output_length = ~0;
    PSA_ASSERT(psa_cipher_decrypt(key, alg, ciphertext->x, ciphertext->len,
                                  output, output_buffer_size,
                                  &output_length));
    TEST_MEMORY_COMPARE(plaintext->x, plaintext->len,
                        output, output_length);

exit:
    mbedtls_free(output);
    psa_cipher_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_bad_key(int alg_arg, int key_type_arg, data_t *key_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t key_type = key_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    /* Usage of either of these two size macros would cause divide by zero
     * with incorrect key types previously. Input length should be irrelevant
     * here. */
    TEST_EQUAL(PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, 16),
               0);
    TEST_EQUAL(PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, 16), 0);


    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Should fail due to invalid alg type (to support invalid key type).
     * Encrypt or decrypt will end up in the same place. */
    status = psa_cipher_encrypt_setup(&operation, key, alg);

    TEST_EQUAL(status, PSA_ERROR_INVALID_ARGUMENT);

exit:
    psa_cipher_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_encrypt_validation(int alg_arg,
                               int key_type_arg,
                               data_t *key_data,
                               data_t *input)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t iv_size = PSA_CIPHER_IV_LENGTH(key_type, alg);
    unsigned char *output1 = NULL;
    size_t output1_buffer_size = 0;
    size_t output1_length = 0;
    unsigned char *output2 = NULL;
    size_t output2_buffer_size = 0;
    size_t output2_length = 0;
    size_t function_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    output1_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input->len);
    output2_buffer_size = PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input->len) +
                          PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg);
    TEST_CALLOC(output1, output1_buffer_size);
    TEST_CALLOC(output2, output2_buffer_size);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* The one-shot cipher encryption uses generated iv so validating
       the output is not possible. Validating with multipart encryption. */
    PSA_ASSERT(psa_cipher_encrypt(key, alg, input->x, input->len, output1,
                                  output1_buffer_size, &output1_length));
    TEST_LE_U(output1_length,
              PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input->len));
    TEST_LE_U(output1_length,
              PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input->len));

    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));
    PSA_ASSERT(psa_cipher_set_iv(&operation, output1, iv_size));

    PSA_ASSERT(psa_cipher_update(&operation,
                                 input->x, input->len,
                                 output2, output2_buffer_size,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input->len));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input->len));
    output2_length += function_output_length;

    PSA_ASSERT(psa_cipher_finish(&operation,
                                 output2 + output2_length,
                                 output2_buffer_size - output2_length,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE);
    output2_length += function_output_length;

    PSA_ASSERT(psa_cipher_abort(&operation));
    TEST_MEMORY_COMPARE(output1 + iv_size, output1_length - iv_size,
                        output2, output2_length);

exit:
    psa_cipher_abort(&operation);
    mbedtls_free(output1);
    mbedtls_free(output2);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_encrypt_multipart(int alg_arg, int key_type_arg,
                              data_t *key_data, data_t *iv,
                              data_t *input,
                              int first_part_size_arg,
                              int output1_length_arg, int output2_length_arg,
                              data_t *expected_output,
                              int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;
    size_t first_part_size = first_part_size_arg;
    size_t output1_length = output1_length_arg;
    size_t output2_length = output2_length_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_cipher_encrypt_setup(&operation, key, alg));

    if (iv->len > 0) {
        PSA_ASSERT(psa_cipher_set_iv(&operation, iv->x, iv->len));
    }

    output_buffer_size = PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input->len) +
                         PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg);
    TEST_CALLOC(output, output_buffer_size);

    TEST_LE_U(first_part_size, input->len);
    PSA_ASSERT(psa_cipher_update(&operation, input->x, first_part_size,
                                 output, output_buffer_size,
                                 &function_output_length));
    TEST_ASSERT(function_output_length == output1_length);
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(first_part_size));
    total_output_length += function_output_length;

    if (first_part_size < input->len) {
        PSA_ASSERT(psa_cipher_update(&operation,
                                     input->x + first_part_size,
                                     input->len - first_part_size,
                                     (output_buffer_size == 0 ? NULL :
                                      output + total_output_length),
                                     output_buffer_size - total_output_length,
                                     &function_output_length));
        TEST_ASSERT(function_output_length == output2_length);
        TEST_LE_U(function_output_length,
                  PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type,
                                                alg,
                                                input->len - first_part_size));
        TEST_LE_U(function_output_length,
                  PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input->len));
        total_output_length += function_output_length;
    }

    status = psa_cipher_finish(&operation,
                               (output_buffer_size == 0 ? NULL :
                                output + total_output_length),
                               output_buffer_size - total_output_length,
                               &function_output_length);
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE);
    total_output_length += function_output_length;
    TEST_EQUAL(status, expected_status);

    if (expected_status == PSA_SUCCESS) {
        PSA_ASSERT(psa_cipher_abort(&operation));

        TEST_MEMORY_COMPARE(expected_output->x, expected_output->len,
                            output, total_output_length);
    }

exit:
    psa_cipher_abort(&operation);
    mbedtls_free(output);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_decrypt_multipart(int alg_arg, int key_type_arg,
                              data_t *key_data, data_t *iv,
                              data_t *input,
                              int first_part_size_arg,
                              int output1_length_arg, int output2_length_arg,
                              data_t *expected_output,
                              int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;
    size_t first_part_size = first_part_size_arg;
    size_t output1_length = output1_length_arg;
    size_t output2_length = output2_length_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_cipher_decrypt_setup(&operation, key, alg));

    if (iv->len > 0) {
        PSA_ASSERT(psa_cipher_set_iv(&operation, iv->x, iv->len));
    }

    output_buffer_size = PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input->len) +
                         PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg);
    TEST_CALLOC(output, output_buffer_size);

    TEST_LE_U(first_part_size, input->len);
    PSA_ASSERT(psa_cipher_update(&operation,
                                 input->x, first_part_size,
                                 output, output_buffer_size,
                                 &function_output_length));
    TEST_ASSERT(function_output_length == output1_length);
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(first_part_size));
    total_output_length += function_output_length;

    if (first_part_size < input->len) {
        PSA_ASSERT(psa_cipher_update(&operation,
                                     input->x + first_part_size,
                                     input->len - first_part_size,
                                     (output_buffer_size == 0 ? NULL :
                                      output + total_output_length),
                                     output_buffer_size - total_output_length,
                                     &function_output_length));
        TEST_ASSERT(function_output_length == output2_length);
        TEST_LE_U(function_output_length,
                  PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type,
                                                alg,
                                                input->len - first_part_size));
        TEST_LE_U(function_output_length,
                  PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input->len));
        total_output_length += function_output_length;
    }

    status = psa_cipher_finish(&operation,
                               (output_buffer_size == 0 ? NULL :
                                output + total_output_length),
                               output_buffer_size - total_output_length,
                               &function_output_length);
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE);
    total_output_length += function_output_length;
    TEST_EQUAL(status, expected_status);

    if (expected_status == PSA_SUCCESS) {
        PSA_ASSERT(psa_cipher_abort(&operation));

        TEST_MEMORY_COMPARE(expected_output->x, expected_output->len,
                            output, total_output_length);
    }

exit:
    psa_cipher_abort(&operation);
    mbedtls_free(output);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_decrypt_fail(int alg_arg,
                         int key_type_arg,
                         data_t *key_data,
                         data_t *iv,
                         data_t *input_arg,
                         int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *input = NULL;
    size_t input_buffer_size = 0;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t output_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    if (PSA_ERROR_BAD_STATE != expected_status) {
        PSA_ASSERT(psa_crypto_init());

        psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
        psa_set_key_algorithm(&attributes, alg);
        psa_set_key_type(&attributes, key_type);

        PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                                  &key));
    }

    /* Allocate input buffer and copy the iv and the plaintext */
    input_buffer_size = ((size_t) input_arg->len + (size_t) iv->len);
    if (input_buffer_size > 0) {
        TEST_CALLOC(input, input_buffer_size);
        memcpy(input, iv->x, iv->len);
        memcpy(input + iv->len, input_arg->x, input_arg->len);
    }

    output_buffer_size = PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_buffer_size);
    TEST_CALLOC(output, output_buffer_size);

    status = psa_cipher_decrypt(key, alg, input, input_buffer_size, output,
                                output_buffer_size, &output_length);
    TEST_EQUAL(status, expected_status);

exit:
    mbedtls_free(input);
    mbedtls_free(output);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_decrypt(int alg_arg,
                    int key_type_arg,
                    data_t *key_data,
                    data_t *iv,
                    data_t *input_arg,
                    data_t *expected_output)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *input = NULL;
    size_t input_buffer_size = 0;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t output_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    /* Allocate input buffer and copy the iv and the plaintext */
    input_buffer_size = ((size_t) input_arg->len + (size_t) iv->len);
    if (input_buffer_size > 0) {
        TEST_CALLOC(input, input_buffer_size);
        memcpy(input, iv->x, iv->len);
        memcpy(input + iv->len, input_arg->x, input_arg->len);
    }

    output_buffer_size = PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_buffer_size);
    TEST_CALLOC(output, output_buffer_size);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_cipher_decrypt(key, alg, input, input_buffer_size, output,
                                  output_buffer_size, &output_length));
    TEST_LE_U(output_length,
              PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_buffer_size));
    TEST_LE_U(output_length,
              PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_buffer_size));

    TEST_MEMORY_COMPARE(expected_output->x, expected_output->len,
                        output, output_length);
exit:
    mbedtls_free(input);
    mbedtls_free(output);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_verify_output(int alg_arg,
                          int key_type_arg,
                          data_t *key_data,
                          data_t *input)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output1 = NULL;
    size_t output1_size = 0;
    size_t output1_length = 0;
    unsigned char *output2 = NULL;
    size_t output2_size = 0;
    size_t output2_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    output1_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input->len);
    TEST_CALLOC(output1, output1_size);

    PSA_ASSERT(psa_cipher_encrypt(key, alg, input->x, input->len,
                                  output1, output1_size,
                                  &output1_length));
    TEST_LE_U(output1_length,
              PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input->len));
    TEST_LE_U(output1_length,
              PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input->len));

    output2_size = output1_length;
    TEST_CALLOC(output2, output2_size);

    PSA_ASSERT(psa_cipher_decrypt(key, alg, output1, output1_length,
                                  output2, output2_size,
                                  &output2_length));
    TEST_LE_U(output2_length,
              PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, output1_length));
    TEST_LE_U(output2_length,
              PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(output1_length));

    TEST_MEMORY_COMPARE(input->x, input->len, output2, output2_length);

exit:
    mbedtls_free(output1);
    mbedtls_free(output2);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_verify_output_multipart(int alg_arg,
                                    int key_type_arg,
                                    data_t *key_data,
                                    data_t *input,
                                    int first_part_size_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t first_part_size = first_part_size_arg;
    unsigned char iv[16] = { 0 };
    size_t iv_size = 16;
    size_t iv_length = 0;
    unsigned char *output1 = NULL;
    size_t output1_buffer_size = 0;
    size_t output1_length = 0;
    unsigned char *output2 = NULL;
    size_t output2_buffer_size = 0;
    size_t output2_length = 0;
    size_t function_output_length;
    psa_cipher_operation_t operation1 = PSA_CIPHER_OPERATION_INIT;
    psa_cipher_operation_t operation2 = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_cipher_encrypt_setup(&operation1, key, alg));
    PSA_ASSERT(psa_cipher_decrypt_setup(&operation2, key, alg));

    if (alg != PSA_ALG_ECB_NO_PADDING) {
        PSA_ASSERT(psa_cipher_generate_iv(&operation1,
                                          iv, iv_size,
                                          &iv_length));
    }

    output1_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input->len);
    TEST_LE_U(output1_buffer_size,
              PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input->len));
    TEST_CALLOC(output1, output1_buffer_size);

    TEST_LE_U(first_part_size, input->len);

    PSA_ASSERT(psa_cipher_update(&operation1, input->x, first_part_size,
                                 output1, output1_buffer_size,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(first_part_size));
    output1_length += function_output_length;

    PSA_ASSERT(psa_cipher_update(&operation1,
                                 input->x + first_part_size,
                                 input->len - first_part_size,
                                 output1, output1_buffer_size,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type,
                                            alg,
                                            input->len - first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input->len - first_part_size));
    output1_length += function_output_length;

    PSA_ASSERT(psa_cipher_finish(&operation1,
                                 output1 + output1_length,
                                 output1_buffer_size - output1_length,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE);
    output1_length += function_output_length;

    PSA_ASSERT(psa_cipher_abort(&operation1));

    output2_buffer_size = output1_length;
    TEST_LE_U(output2_buffer_size,
              PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, output1_length));
    TEST_LE_U(output2_buffer_size,
              PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(output1_length));
    TEST_CALLOC(output2, output2_buffer_size);

    if (iv_length > 0) {
        PSA_ASSERT(psa_cipher_set_iv(&operation2,
                                     iv, iv_length));
    }

    PSA_ASSERT(psa_cipher_update(&operation2, output1, first_part_size,
                                 output2, output2_buffer_size,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(first_part_size));
    output2_length += function_output_length;

    PSA_ASSERT(psa_cipher_update(&operation2,
                                 output1 + first_part_size,
                                 output1_length - first_part_size,
                                 output2, output2_buffer_size,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type,
                                            alg,
                                            output1_length - first_part_size));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(output1_length - first_part_size));
    output2_length += function_output_length;

    PSA_ASSERT(psa_cipher_finish(&operation2,
                                 output2 + output2_length,
                                 output2_buffer_size - output2_length,
                                 &function_output_length));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg));
    TEST_LE_U(function_output_length,
              PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE);
    output2_length += function_output_length;

    PSA_ASSERT(psa_cipher_abort(&operation2));

    TEST_MEMORY_COMPARE(input->x, input->len, output2, output2_length);

exit:
    psa_cipher_abort(&operation1);
    psa_cipher_abort(&operation2);
    mbedtls_free(output1);
    mbedtls_free(output2);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void aead_encrypt_decrypt(int key_type_arg, data_t *key_data,
                          int alg_arg,
                          data_t *nonce,
                          data_t *additional_data,
                          data_t *input_data,
                          int expected_result_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    unsigned char *output_data2 = NULL;
    size_t output_length2 = 0;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;
    psa_status_t expected_result = expected_result_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    output_size = input_data->len + PSA_AEAD_TAG_LENGTH(key_type, key_bits,
                                                        alg);
    /* For all currently defined algorithms, PSA_AEAD_ENCRYPT_OUTPUT_SIZE
     * should be exact. */
    if (expected_result != PSA_ERROR_INVALID_ARGUMENT &&
        expected_result != PSA_ERROR_NOT_SUPPORTED) {
        TEST_EQUAL(output_size,
                   PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_data->len));
        TEST_ASSERT(output_size <=
                    PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(input_data->len));
    }
    TEST_CALLOC(output_data, output_size);

    status = psa_aead_encrypt(key, alg,
                              nonce->x, nonce->len,
                              additional_data->x,
                              additional_data->len,
                              input_data->x, input_data->len,
                              output_data, output_size,
                              &output_length);

    /* If the operation is not supported, just skip and not fail in case the
     * encryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if (status == PSA_ERROR_NOT_SUPPORTED) {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192(key_type, key_data->len * 8);
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE(alg, nonce->len);
    }

    TEST_EQUAL(status, expected_result);

    if (PSA_SUCCESS == expected_result) {
        TEST_CALLOC(output_data2, output_length);

        /* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE
         * should be exact. */
        TEST_EQUAL(input_data->len,
                   PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, output_length));

        TEST_ASSERT(input_data->len <=
                    PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(output_length));

        TEST_EQUAL(psa_aead_decrypt(key, alg,
                                    nonce->x, nonce->len,
                                    additional_data->x,
                                    additional_data->len,
                                    output_data, output_length,
                                    output_data2, output_length,
                                    &output_length2),
                   expected_result);

        TEST_MEMORY_COMPARE(input_data->x, input_data->len,
                            output_data2, output_length2);
    }

exit:
    psa_destroy_key(key);
    mbedtls_free(output_data);
    mbedtls_free(output_data2);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void aead_encrypt(int key_type_arg, data_t *key_data,
                  int alg_arg,
                  data_t *nonce,
                  data_t *additional_data,
                  data_t *input_data,
                  data_t *expected_result)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    output_size = input_data->len + PSA_AEAD_TAG_LENGTH(key_type, key_bits,
                                                        alg);
    /* For all currently defined algorithms, PSA_AEAD_ENCRYPT_OUTPUT_SIZE
     * should be exact. */
    TEST_EQUAL(output_size,
               PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_data->len));
    TEST_ASSERT(output_size <=
                PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(input_data->len));
    TEST_CALLOC(output_data, output_size);

    status = psa_aead_encrypt(key, alg,
                              nonce->x, nonce->len,
                              additional_data->x, additional_data->len,
                              input_data->x, input_data->len,
                              output_data, output_size,
                              &output_length);

    /* If the operation is not supported, just skip and not fail in case the
     * encryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if (status == PSA_ERROR_NOT_SUPPORTED) {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192(key_type, key_data->len * 8);
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE(alg, nonce->len);
    }

    PSA_ASSERT(status);
    TEST_MEMORY_COMPARE(expected_result->x, expected_result->len,
                        output_data, output_length);

exit:
    psa_destroy_key(key);
    mbedtls_free(output_data);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void aead_decrypt(int key_type_arg, data_t *key_data,
                  int alg_arg,
                  data_t *nonce,
                  data_t *additional_data,
                  data_t *input_data,
                  data_t *expected_data,
                  int expected_result_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_result = expected_result_arg;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    output_size = input_data->len - PSA_AEAD_TAG_LENGTH(key_type, key_bits,
                                                        alg);
    if (expected_result != PSA_ERROR_INVALID_ARGUMENT &&
        expected_result != PSA_ERROR_NOT_SUPPORTED) {
        /* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE
         * should be exact. */
        TEST_EQUAL(output_size,
                   PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, input_data->len));
        TEST_ASSERT(output_size <=
                    PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(input_data->len));
    }
    TEST_CALLOC(output_data, output_size);

    status = psa_aead_decrypt(key, alg,
                              nonce->x, nonce->len,
                              additional_data->x,
                              additional_data->len,
                              input_data->x, input_data->len,
                              output_data, output_size,
                              &output_length);

    /* If the operation is not supported, just skip and not fail in case the
     * decryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if (status == PSA_ERROR_NOT_SUPPORTED) {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192(key_type, key_data->len * 8);
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE(alg, nonce->len);
    }

    TEST_EQUAL(status, expected_result);

    if (expected_result == PSA_SUCCESS) {
        TEST_MEMORY_COMPARE(expected_data->x, expected_data->len,
                            output_data, output_length);
    }

exit:
    psa_destroy_key(key);
    mbedtls_free(output_data);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void signature_size(int type_arg,
                    int bits,
                    int alg_arg,
                    int expected_size_arg)
{
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t actual_size = PSA_SIGN_OUTPUT_SIZE(type, bits, alg);

    TEST_EQUAL(actual_size, (size_t) expected_size_arg);
#if defined(MBEDTLS_TEST_DEPRECATED)
    TEST_EQUAL(actual_size,
               PSA_ASYMMETRIC_SIGN_OUTPUT_SIZE(type, bits, alg));
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    ;
}
/* END_CASE */

/* BEGIN_CASE */
void sign_hash_deterministic(int key_type_arg, data_t *key_data,
                             int alg_arg, data_t *input_data,
                             data_t *output_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    /* Allocate a buffer which has the size advertised by the
     * library. */
    signature_size = PSA_SIGN_OUTPUT_SIZE(key_type,
                                          key_bits, alg);
    TEST_ASSERT(signature_size != 0);
    TEST_LE_U(signature_size, PSA_SIGNATURE_MAX_SIZE);
    TEST_CALLOC(signature, signature_size);

    /* Perform the signature. */
    PSA_ASSERT(psa_sign_hash(key, alg,
                             input_data->x, input_data->len,
                             signature, signature_size,
                             &signature_length));
    /* Verify that the signature is what is expected. */
    TEST_MEMORY_COMPARE(output_data->x, output_data->len,
                        signature, signature_length);

#if defined(MBEDTLS_TEST_DEPRECATED)
    memset(signature, 0, signature_size);
    signature_length = INVALID_EXPORT_LENGTH;
    PSA_ASSERT(psa_asymmetric_sign(key, alg,
                                   input_data->x, input_data->len,
                                   signature, signature_size,
                                   &signature_length));
    TEST_MEMORY_COMPARE(output_data->x, output_data->len,
                        signature, signature_length);
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void sign_hash_fail(int key_type_arg, data_t *key_data,
                    int alg_arg, data_t *input_data,
                    int signature_size_arg, int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t signature_size = signature_size_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *signature = NULL;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_CALLOC(signature, signature_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    actual_status = psa_sign_hash(key, alg,
                                  input_data->x, input_data->len,
                                  signature, signature_size,
                                  &signature_length);
    TEST_EQUAL(actual_status, expected_status);
    /* The value of *signature_length is unspecified on error, but
     * whatever it is, it should be less than signature_size, so that
     * if the caller tries to read *signature_length bytes without
     * checking the error code then they don't overflow a buffer. */
    TEST_LE_U(signature_length, signature_size);

#if defined(MBEDTLS_TEST_DEPRECATED)
    signature_length = INVALID_EXPORT_LENGTH;
    TEST_EQUAL(psa_asymmetric_sign(key, alg,
                                   input_data->x, input_data->len,
                                   signature, signature_size,
                                   &signature_length),
               expected_status);
    TEST_LE_U(signature_length, signature_size);
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void sign_verify_hash(int key_type_arg, data_t *key_data,
                      int alg_arg, data_t *input_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    /* Allocate a buffer which has the size advertised by the
     * library. */
    signature_size = PSA_SIGN_OUTPUT_SIZE(key_type,
                                          key_bits, alg);
    TEST_ASSERT(signature_size != 0);
    TEST_LE_U(signature_size, PSA_SIGNATURE_MAX_SIZE);
    TEST_CALLOC(signature, signature_size);

    /* Perform the signature. */
    PSA_ASSERT(psa_sign_hash(key, alg,
                             input_data->x, input_data->len,
                             signature, signature_size,
                             &signature_length));
    /* Check that the signature length looks sensible. */
    TEST_LE_U(signature_length, signature_size);
    TEST_ASSERT(signature_length > 0);

    /* Use the library to verify that the signature is correct. */
    PSA_ASSERT(psa_verify_hash(key, alg,
                               input_data->x, input_data->len,
                               signature, signature_length));

    if (input_data->len != 0) {
        /* Flip a bit in the input and verify that the signature is now
         * detected as invalid. Flip a bit at the beginning, not at the end,
         * because ECDSA may ignore the last few bits of the input. */
        input_data->x[0] ^= 1;
        TEST_EQUAL(psa_verify_hash(key, alg,
                                   input_data->x, input_data->len,
                                   signature, signature_length),
                   PSA_ERROR_INVALID_SIGNATURE);
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void verify_hash(int key_type_arg, data_t *key_data,
                 int alg_arg, data_t *hash_data,
                 data_t *signature_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_LE_U(signature_data->len, PSA_SIGNATURE_MAX_SIZE);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_verify_hash(key, alg,
                               hash_data->x, hash_data->len,
                               signature_data->x, signature_data->len));

#if defined(MBEDTLS_TEST_DEPRECATED)
    PSA_ASSERT(psa_asymmetric_verify(key, alg,
                                     hash_data->x, hash_data->len,
                                     signature_data->x,
                                     signature_data->len));

#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void verify_hash_fail(int key_type_arg, data_t *key_data,
                      int alg_arg, data_t *hash_data,
                      data_t *signature_data,
                      int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    actual_status = psa_verify_hash(key, alg,
                                    hash_data->x, hash_data->len,
                                    signature_data->x, signature_data->len);
    TEST_EQUAL(actual_status, expected_status);

#if defined(MBEDTLS_TEST_DEPRECATED)
    TEST_EQUAL(psa_asymmetric_verify(key, alg,
                                     hash_data->x, hash_data->len,
                                     signature_data->x, signature_data->len),
               expected_status);
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void sign_message_deterministic(int key_type_arg,
                                data_t *key_data,
                                int alg_arg,
                                data_t *input_data,
                                data_t *output_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_MESSAGE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    signature_size = PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg);
    TEST_ASSERT(signature_size != 0);
    TEST_LE_U(signature_size, PSA_SIGNATURE_MAX_SIZE);
    TEST_CALLOC(signature, signature_size);

    PSA_ASSERT(psa_sign_message(key, alg,
                                input_data->x, input_data->len,
                                signature, signature_size,
                                &signature_length));

    TEST_MEMORY_COMPARE(output_data->x, output_data->len,
                        signature, signature_length);

exit:
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();

}
/* END_CASE */

/* BEGIN_CASE */
void sign_message_fail(int key_type_arg,
                       data_t *key_data,
                       int alg_arg,
                       data_t *input_data,
                       int signature_size_arg,
                       int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t signature_size = signature_size_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *signature = NULL;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_CALLOC(signature, signature_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_MESSAGE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    actual_status = psa_sign_message(key, alg,
                                     input_data->x, input_data->len,
                                     signature, signature_size,
                                     &signature_length);
    TEST_EQUAL(actual_status, expected_status);
    /* The value of *signature_length is unspecified on error, but
     * whatever it is, it should be less than signature_size, so that
     * if the caller tries to read *signature_length bytes without
     * checking the error code then they don't overflow a buffer. */
    TEST_LE_U(signature_length, signature_size);

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void sign_verify_message(int key_type_arg,
                         data_t *key_data,
                         int alg_arg,
                         data_t *input_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_MESSAGE |
                            PSA_KEY_USAGE_VERIFY_MESSAGE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    signature_size = PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg);
    TEST_ASSERT(signature_size != 0);
    TEST_LE_U(signature_size, PSA_SIGNATURE_MAX_SIZE);
    TEST_CALLOC(signature, signature_size);

    PSA_ASSERT(psa_sign_message(key, alg,
                                input_data->x, input_data->len,
                                signature, signature_size,
                                &signature_length));
    TEST_LE_U(signature_length, signature_size);
    TEST_ASSERT(signature_length > 0);

    PSA_ASSERT(psa_verify_message(key, alg,
                                  input_data->x, input_data->len,
                                  signature, signature_length));

    if (input_data->len != 0) {
        /* Flip a bit in the input and verify that the signature is now
         * detected as invalid. Flip a bit at the beginning, not at the end,
         * because ECDSA may ignore the last few bits of the input. */
        input_data->x[0] ^= 1;
        TEST_EQUAL(psa_verify_message(key, alg,
                                      input_data->x, input_data->len,
                                      signature, signature_length),
                   PSA_ERROR_INVALID_SIGNATURE);
    }

exit:
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(signature);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void verify_message(int key_type_arg,
                    data_t *key_data,
                    int alg_arg,
                    data_t *input_data,
                    data_t *signature_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_LE_U(signature_data->len, PSA_SIGNATURE_MAX_SIZE);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_MESSAGE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_verify_message(key, alg,
                                  input_data->x, input_data->len,
                                  signature_data->x, signature_data->len));

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void verify_message_fail(int key_type_arg,
                         data_t *key_data,
                         int alg_arg,
                         data_t *hash_data,
                         data_t *signature_data,
                         int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_MESSAGE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    actual_status = psa_verify_message(key, alg,
                                       hash_data->x, hash_data->len,
                                       signature_data->x,
                                       signature_data->len);
    TEST_EQUAL(actual_status, expected_status);

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encrypt(int key_type_arg,
                        data_t *key_data,
                        int alg_arg,
                        data_t *input_data,
                        data_t *label,
                        int expected_output_length_arg,
                        int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t expected_output_length = expected_output_length_arg;
    size_t key_bits;
    unsigned char *output = NULL;
    size_t output_size;
    size_t output_length = ~0;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    /* Import the key */
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);
    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Determine the maximum output length */
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg);
    TEST_LE_U(output_size, PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE);
    TEST_CALLOC(output, output_size);

    /* Encrypt the input */
    actual_status = psa_asymmetric_encrypt(key, alg,
                                           input_data->x, input_data->len,
                                           label->x, label->len,
                                           output, output_size,
                                           &output_length);
    TEST_EQUAL(actual_status, expected_status);
    if (actual_status == PSA_SUCCESS) {
        TEST_EQUAL(output_length, expected_output_length);
    } else {
        TEST_LE_U(output_length, output_size);
    }

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if (label->len == 0) {
        output_length = ~0;
        if (output_size != 0) {
            memset(output, 0, output_size);
        }
        actual_status = psa_asymmetric_encrypt(key, alg,
                                               input_data->x, input_data->len,
                                               NULL, label->len,
                                               output, output_size,
                                               &output_length);
        TEST_EQUAL(actual_status, expected_status);
        if (actual_status == PSA_SUCCESS) {
            TEST_EQUAL(output_length, expected_output_length);
        } else {
            TEST_LE_U(output_length, output_size);
        }
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(output);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encrypt_decrypt(int key_type_arg,
                                data_t *key_data,
                                int alg_arg,
                                data_t *input_data,
                                data_t *label)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output = NULL;
    size_t output_size;
    size_t output_length = ~0;
    unsigned char *output2 = NULL;
    size_t output2_size;
    size_t output2_length = ~0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    /* Determine the maximum ciphertext length */
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg);
    TEST_LE_U(output_size, PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE);
    TEST_CALLOC(output, output_size);

    output2_size = input_data->len;
    TEST_LE_U(output2_size,
              PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg));
    TEST_LE_U(output2_size, PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE);
    TEST_CALLOC(output2, output2_size);

    /* We test encryption by checking that encrypt-then-decrypt gives back
     * the original plaintext because of the non-optional random
     * part of encryption process which prevents using fixed vectors. */
    PSA_ASSERT(psa_asymmetric_encrypt(key, alg,
                                      input_data->x, input_data->len,
                                      label->x, label->len,
                                      output, output_size,
                                      &output_length));
    /* We don't know what ciphertext length to expect, but check that
     * it looks sensible. */
    TEST_LE_U(output_length, output_size);

    PSA_ASSERT(psa_asymmetric_decrypt(key, alg,
                                      output, output_length,
                                      label->x, label->len,
                                      output2, output2_size,
                                      &output2_length));
    TEST_MEMORY_COMPARE(input_data->x, input_data->len,
                        output2, output2_length);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    mbedtls_free(output);
    mbedtls_free(output2);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_decrypt(int key_type_arg,
                        data_t *key_data,
                        int alg_arg,
                        data_t *input_data,
                        data_t *label,
                        data_t *expected_data)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output = NULL;
    size_t output_size = 0;
    size_t output_length = ~0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    /* Determine the maximum ciphertext length */
    output_size = PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg);
    TEST_LE_U(output_size, PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE);
    TEST_CALLOC(output, output_size);

    PSA_ASSERT(psa_asymmetric_decrypt(key, alg,
                                      input_data->x, input_data->len,
                                      label->x, label->len,
                                      output,
                                      output_size,
                                      &output_length));
    TEST_MEMORY_COMPARE(expected_data->x, expected_data->len,
                        output, output_length);

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if (label->len == 0) {
        output_length = ~0;
        if (output_size != 0) {
            memset(output, 0, output_size);
        }
        PSA_ASSERT(psa_asymmetric_decrypt(key, alg,
                                          input_data->x, input_data->len,
                                          NULL, label->len,
                                          output,
                                          output_size,
                                          &output_length));
        TEST_MEMORY_COMPARE(expected_data->x, expected_data->len,
                            output, output_length);
    }

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    mbedtls_free(output);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_decrypt_fail(int key_type_arg,
                             data_t *key_data,
                             int alg_arg,
                             data_t *input_data,
                             data_t *label,
                             int output_size_arg,
                             int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output = NULL;
    size_t output_size = output_size_arg;
    size_t output_length = ~0;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_CALLOC(output, output_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    actual_status = psa_asymmetric_decrypt(key, alg,
                                           input_data->x, input_data->len,
                                           label->x, label->len,
                                           output, output_size,
                                           &output_length);
    TEST_EQUAL(actual_status, expected_status);
    TEST_LE_U(output_length, output_size);

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if (label->len == 0) {
        output_length = ~0;
        if (output_size != 0) {
            memset(output, 0, output_size);
        }
        actual_status = psa_asymmetric_decrypt(key, alg,
                                               input_data->x, input_data->len,
                                               NULL, label->len,
                                               output, output_size,
                                               &output_length);
        TEST_EQUAL(actual_status, expected_status);
        TEST_LE_U(output_length, output_size);
    }

exit:
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(key);
    mbedtls_free(output);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void key_derivation_init()
{
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to suppress the Clang warning for the test. */
    size_t capacity;
    psa_key_derivation_operation_t func = psa_key_derivation_operation_init();
    psa_key_derivation_operation_t init = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_derivation_operation_t zero;

    memset(&zero, 0, sizeof(zero));

    /* A default operation should not be able to report its capacity. */
    TEST_EQUAL(psa_key_derivation_get_capacity(&func, &capacity),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_key_derivation_get_capacity(&init, &capacity),
               PSA_ERROR_BAD_STATE);
    TEST_EQUAL(psa_key_derivation_get_capacity(&zero, &capacity),
               PSA_ERROR_BAD_STATE);

    /* A default operation should be abortable without error. */
    PSA_ASSERT(psa_key_derivation_abort(&func));
    PSA_ASSERT(psa_key_derivation_abort(&init));
    PSA_ASSERT(psa_key_derivation_abort(&zero));
}
/* END_CASE */

/* BEGIN_CASE */
void derive_setup(int alg_arg, int expected_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    PSA_ASSERT(psa_crypto_init());

    TEST_EQUAL(psa_key_derivation_setup(&operation, alg),
               expected_status);

exit:
    psa_key_derivation_abort(&operation);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_set_capacity(int alg_arg, int64_t capacity_arg,
                         int expected_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    size_t capacity = capacity_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    PSA_ASSERT(psa_crypto_init());

    PSA_ASSERT(psa_key_derivation_setup(&operation, alg));

    TEST_EQUAL(psa_key_derivation_set_capacity(&operation, capacity),
               expected_status);

exit:
    psa_key_derivation_abort(&operation);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_input(int alg_arg,
                  int step_arg1, int key_type_arg1, data_t *input1,
                  int expected_status_arg1,
                  int step_arg2, int key_type_arg2, data_t *input2,
                  int expected_status_arg2,
                  int step_arg3, int key_type_arg3, data_t *input3,
                  int expected_status_arg3,
                  int output_key_type_arg, int expected_output_status_arg)
{
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_step_t steps[] = { step_arg1, step_arg2, step_arg3 };
    psa_key_type_t key_types[] = { key_type_arg1, key_type_arg2, key_type_arg3 };
    psa_status_t expected_statuses[] = { expected_status_arg1,
                                         expected_status_arg2,
                                         expected_status_arg3 };
    data_t *inputs[] = { input1, input2, input3 };
    mbedtls_svc_key_id_t keys[] = { MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT };
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t i;
    psa_key_type_t output_key_type = output_key_type_arg;
    mbedtls_svc_key_id_t output_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t expected_output_status = expected_output_status_arg;
    psa_status_t actual_output_status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);

    PSA_ASSERT(psa_key_derivation_setup(&operation, alg));

    for (i = 0; i < ARRAY_LENGTH(steps); i++) {
        mbedtls_test_set_step(i);
        if (steps[i] == 0) {
            /* Skip this step */
        } else if (key_types[i] != PSA_KEY_TYPE_NONE) {
            psa_set_key_type(&attributes, key_types[i]);
            PSA_ASSERT(psa_import_key(&attributes,
                                      inputs[i]->x, inputs[i]->len,
                                      &keys[i]));
            if (PSA_KEY_TYPE_IS_KEY_PAIR(key_types[i]) &&
                steps[i] == PSA_KEY_DERIVATION_INPUT_SECRET) {
                // When taking a private key as secret input, use key agreement
                // to add the shared secret to the derivation
                TEST_EQUAL(mbedtls_test_psa_key_agreement_with_self(
                               &operation, keys[i]),
                           expected_statuses[i]);
            } else {
                TEST_EQUAL(psa_key_derivation_input_key(&operation, steps[i],
                                                        keys[i]),
                           expected_statuses[i]);
            }
        } else {
            TEST_EQUAL(psa_key_derivation_input_bytes(
                           &operation, steps[i],
                           inputs[i]->x, inputs[i]->len),
                       expected_statuses[i]);
        }
    }

    if (output_key_type != PSA_KEY_TYPE_NONE) {
        psa_reset_key_attributes(&attributes);
        psa_set_key_type(&attributes, output_key_type);
        psa_set_key_bits(&attributes, 8);
        actual_output_status =
            psa_key_derivation_output_key(&attributes, &operation,
                                          &output_key);
    } else {
        uint8_t buffer[1];
        actual_output_status =
            psa_key_derivation_output_bytes(&operation,
                                            buffer, sizeof(buffer));
    }
    TEST_EQUAL(actual_output_status, expected_output_status);

exit:
    psa_key_derivation_abort(&operation);
    for (i = 0; i < ARRAY_LENGTH(keys); i++) {
        psa_destroy_key(keys[i]);
    }
    psa_destroy_key(output_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_over_capacity(int alg_arg)
{
    psa_algorithm_t alg = alg_arg;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    size_t key_type = PSA_KEY_TYPE_DERIVE;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char input1[] = "Input 1";
    size_t input1_length = sizeof(input1);
    unsigned char input2[] = "Input 2";
    size_t input2_length = sizeof(input2);
    uint8_t buffer[42];
    size_t capacity = sizeof(buffer);
    const uint8_t key_data[22] = { 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
                                   0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
                                   0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b };
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, key_type);

    PSA_ASSERT(psa_import_key(&attributes,
                              key_data, sizeof(key_data),
                              &key));

    /* valid key derivation */
    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, key, alg,
                                                    input1, input1_length,
                                                    input2, input2_length,
                                                    capacity)) {
        goto exit;
    }

    /* state of operation shouldn't allow additional generation */
    TEST_EQUAL(psa_key_derivation_setup(&operation, alg),
               PSA_ERROR_BAD_STATE);

    PSA_ASSERT(psa_key_derivation_output_bytes(&operation, buffer, capacity));

    TEST_EQUAL(psa_key_derivation_output_bytes(&operation, buffer, capacity),
               PSA_ERROR_INSUFFICIENT_DATA);

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_actions_without_setup()
{
    uint8_t output_buffer[16];
    size_t buffer_size = 16;
    size_t capacity = 0;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    TEST_ASSERT(psa_key_derivation_output_bytes(&operation,
                                                output_buffer, buffer_size)
                == PSA_ERROR_BAD_STATE);

    TEST_ASSERT(psa_key_derivation_get_capacity(&operation, &capacity)
                == PSA_ERROR_BAD_STATE);

    PSA_ASSERT(psa_key_derivation_abort(&operation));

    TEST_ASSERT(psa_key_derivation_output_bytes(&operation,
                                                output_buffer, buffer_size)
                == PSA_ERROR_BAD_STATE);

    TEST_ASSERT(psa_key_derivation_get_capacity(&operation, &capacity)
                == PSA_ERROR_BAD_STATE);

exit:
    psa_key_derivation_abort(&operation);
}
/* END_CASE */

/* BEGIN_CASE */
void derive_output(int alg_arg,
                   int step1_arg, data_t *input1,
                   int step2_arg, data_t *input2,
                   int step3_arg, data_t *input3,
                   int requested_capacity_arg,
                   data_t *expected_output1,
                   data_t *expected_output2)
{
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_step_t steps[] = { step1_arg, step2_arg, step3_arg };
    data_t *inputs[] = { input1, input2, input3 };
    mbedtls_svc_key_id_t keys[] = { MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT };
    size_t requested_capacity = requested_capacity_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    uint8_t *expected_outputs[2] =
    { expected_output1->x, expected_output2->x };
    size_t output_sizes[2] =
    { expected_output1->len, expected_output2->len };
    size_t output_buffer_size = 0;
    uint8_t *output_buffer = NULL;
    size_t expected_capacity;
    size_t current_capacity;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;
    size_t i;

    for (i = 0; i < ARRAY_LENGTH(expected_outputs); i++) {
        if (output_sizes[i] > output_buffer_size) {
            output_buffer_size = output_sizes[i];
        }
        if (output_sizes[i] == 0) {
            expected_outputs[i] = NULL;
        }
    }
    TEST_CALLOC(output_buffer, output_buffer_size);
    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, PSA_KEY_TYPE_DERIVE);

    /* Extraction phase. */
    PSA_ASSERT(psa_key_derivation_setup(&operation, alg));
    PSA_ASSERT(psa_key_derivation_set_capacity(&operation,
                                               requested_capacity));
    for (i = 0; i < ARRAY_LENGTH(steps); i++) {
        switch (steps[i]) {
            case 0:
                break;
            case PSA_KEY_DERIVATION_INPUT_SECRET:
                PSA_ASSERT(psa_import_key(&attributes,
                                          inputs[i]->x, inputs[i]->len,
                                          &keys[i]));

                if (PSA_ALG_IS_TLS12_PSK_TO_MS(alg)) {
                    PSA_ASSERT(psa_get_key_attributes(keys[i], &attributes));
                    TEST_ASSERT(PSA_BITS_TO_BYTES(psa_get_key_bits(&attributes)) <=
                                PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE);
                }

                PSA_ASSERT(psa_key_derivation_input_key(
                               &operation, steps[i], keys[i]));
                break;
            default:
                PSA_ASSERT(psa_key_derivation_input_bytes(
                               &operation, steps[i],
                               inputs[i]->x, inputs[i]->len));
                break;
        }
    }

    PSA_ASSERT(psa_key_derivation_get_capacity(&operation,
                                               &current_capacity));
    TEST_EQUAL(current_capacity, requested_capacity);
    expected_capacity = requested_capacity;

    /* Expansion phase. */
    for (i = 0; i < ARRAY_LENGTH(expected_outputs); i++) {
        /* Read some bytes. */
        status = psa_key_derivation_output_bytes(&operation,
                                                 output_buffer, output_sizes[i]);
        if (expected_capacity == 0 && output_sizes[i] == 0) {
            /* Reading 0 bytes when 0 bytes are available can go either way. */
            TEST_ASSERT(status == PSA_SUCCESS ||
                        status == PSA_ERROR_INSUFFICIENT_DATA);
            continue;
        } else if (expected_capacity == 0 ||
                   output_sizes[i] > expected_capacity) {
            /* Capacity exceeded. */
            TEST_EQUAL(status, PSA_ERROR_INSUFFICIENT_DATA);
            expected_capacity = 0;
            continue;
        }
        /* Success. Check the read data. */
        PSA_ASSERT(status);
        if (output_sizes[i] != 0) {
            TEST_MEMORY_COMPARE(output_buffer, output_sizes[i],
                                expected_outputs[i], output_sizes[i]);
        }
        /* Check the operation status. */
        expected_capacity -= output_sizes[i];
        PSA_ASSERT(psa_key_derivation_get_capacity(&operation,
                                                   &current_capacity));
        TEST_EQUAL(expected_capacity, current_capacity);
    }
    PSA_ASSERT(psa_key_derivation_abort(&operation));

exit:
    mbedtls_free(output_buffer);
    psa_key_derivation_abort(&operation);
    for (i = 0; i < ARRAY_LENGTH(keys); i++) {
        psa_destroy_key(keys[i]);
    }
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_full(int alg_arg,
                 data_t *key_data,
                 data_t *input1,
                 data_t *input2,
                 int requested_capacity_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    size_t requested_capacity = requested_capacity_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char output_buffer[32];
    size_t expected_capacity = requested_capacity;
    size_t current_capacity;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, PSA_KEY_TYPE_DERIVE);

    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &key));

    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, key, alg,
                                                    input1->x, input1->len,
                                                    input2->x, input2->len,
                                                    requested_capacity)) {
        goto exit;
    }

    PSA_ASSERT(psa_key_derivation_get_capacity(&operation,
                                               &current_capacity));
    TEST_EQUAL(current_capacity, expected_capacity);

    /* Expansion phase. */
    while (current_capacity > 0) {
        size_t read_size = sizeof(output_buffer);
        if (read_size > current_capacity) {
            read_size = current_capacity;
        }
        PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                                   output_buffer,
                                                   read_size));
        expected_capacity -= read_size;
        PSA_ASSERT(psa_key_derivation_get_capacity(&operation,
                                                   &current_capacity));
        TEST_EQUAL(current_capacity, expected_capacity);
    }

    /* Check that the operation refuses to go over capacity. */
    TEST_EQUAL(psa_key_derivation_output_bytes(&operation, output_buffer, 1),
               PSA_ERROR_INSUFFICIENT_DATA);

    PSA_ASSERT(psa_key_derivation_abort(&operation));

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_exercise(int alg_arg,
                         data_t *key_data,
                         data_t *input1,
                         data_t *input2,
                         int derived_type_arg,
                         int derived_bits_arg,
                         int derived_usage_arg,
                         int derived_alg_arg)
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t derived_type = derived_type_arg;
    size_t derived_bits = derived_bits_arg;
    psa_key_usage_t derived_usage = derived_usage_arg;
    psa_algorithm_t derived_alg = derived_alg_arg;
    size_t capacity = PSA_BITS_TO_BYTES(derived_bits);
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, PSA_KEY_TYPE_DERIVE);
    PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len,
                              &base_key));

    /* Derive a key. */
    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, base_key, alg,
                                                    input1->x, input1->len,
                                                    input2->x, input2->len,
                                                    capacity)) {
        goto exit;
    }

    psa_set_key_usage_flags(&attributes, derived_usage);
    psa_set_key_algorithm(&attributes, derived_alg);
    psa_set_key_type(&attributes, derived_type);
    psa_set_key_bits(&attributes, derived_bits);
    PSA_ASSERT(psa_key_derivation_output_key(&attributes, &operation,
                                             &derived_key));

    /* Test the key information */
    PSA_ASSERT(psa_get_key_attributes(derived_key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), derived_type);
    TEST_EQUAL(psa_get_key_bits(&got_attributes), derived_bits);

    /* Exercise the derived key. */
    if (!mbedtls_test_psa_exercise_key(derived_key, derived_usage, derived_alg)) {
        goto exit;
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_key_derivation_abort(&operation);
    psa_destroy_key(base_key);
    psa_destroy_key(derived_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_export(int alg_arg,
                       data_t *key_data,
                       data_t *input1,
                       data_t *input2,
                       int bytes1_arg,
                       int bytes2_arg)
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    size_t bytes1 = bytes1_arg;
    size_t bytes2 = bytes2_arg;
    size_t capacity = bytes1 + bytes2;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    uint8_t *output_buffer = NULL;
    uint8_t *export_buffer = NULL;
    psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t derived_attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t length;

    TEST_CALLOC(output_buffer, capacity);
    TEST_CALLOC(export_buffer, capacity);
    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&base_attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&base_attributes, alg);
    psa_set_key_type(&base_attributes, PSA_KEY_TYPE_DERIVE);
    PSA_ASSERT(psa_import_key(&base_attributes, key_data->x, key_data->len,
                              &base_key));

    /* Derive some material and output it. */
    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, base_key, alg,
                                                    input1->x, input1->len,
                                                    input2->x, input2->len,
                                                    capacity)) {
        goto exit;
    }

    PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                               output_buffer,
                                               capacity));
    PSA_ASSERT(psa_key_derivation_abort(&operation));

    /* Derive the same output again, but this time store it in key objects. */
    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, base_key, alg,
                                                    input1->x, input1->len,
                                                    input2->x, input2->len,
                                                    capacity)) {
        goto exit;
    }

    psa_set_key_usage_flags(&derived_attributes, PSA_KEY_USAGE_EXPORT);
    psa_set_key_algorithm(&derived_attributes, 0);
    psa_set_key_type(&derived_attributes, PSA_KEY_TYPE_RAW_DATA);
    psa_set_key_bits(&derived_attributes, PSA_BYTES_TO_BITS(bytes1));
    PSA_ASSERT(psa_key_derivation_output_key(&derived_attributes, &operation,
                                             &derived_key));
    PSA_ASSERT(psa_export_key(derived_key,
                              export_buffer, bytes1,
                              &length));
    TEST_EQUAL(length, bytes1);
    PSA_ASSERT(psa_destroy_key(derived_key));
    psa_set_key_bits(&derived_attributes, PSA_BYTES_TO_BITS(bytes2));
    PSA_ASSERT(psa_key_derivation_output_key(&derived_attributes, &operation,
                                             &derived_key));
    PSA_ASSERT(psa_export_key(derived_key,
                              export_buffer + bytes1, bytes2,
                              &length));
    TEST_EQUAL(length, bytes2);

    /* Compare the outputs from the two runs. */
    TEST_MEMORY_COMPARE(output_buffer, bytes1 + bytes2,
                        export_buffer, capacity);

exit:
    mbedtls_free(output_buffer);
    mbedtls_free(export_buffer);
    psa_key_derivation_abort(&operation);
    psa_destroy_key(base_key);
    psa_destroy_key(derived_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key(int alg_arg,
                data_t *key_data, data_t *input1, data_t *input2,
                int type_arg, int bits_arg,
                int expected_status_arg,
                int is_large_output)
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t derived_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&base_attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&base_attributes, alg);
    psa_set_key_type(&base_attributes, PSA_KEY_TYPE_DERIVE);
    PSA_ASSERT(psa_import_key(&base_attributes, key_data->x, key_data->len,
                              &base_key));

    if (!mbedtls_test_psa_setup_key_derivation_wrap(&operation, base_key, alg,
                                                    input1->x, input1->len,
                                                    input2->x, input2->len,
                                                    SIZE_MAX)) {
        goto exit;
    }

    psa_set_key_usage_flags(&derived_attributes, PSA_KEY_USAGE_EXPORT);
    psa_set_key_algorithm(&derived_attributes, 0);
    psa_set_key_type(&derived_attributes, type);
    psa_set_key_bits(&derived_attributes, bits);

    psa_status_t status =
        psa_key_derivation_output_key(&derived_attributes,
                                      &operation,
                                      &derived_key);
    if (is_large_output > 0) {
        TEST_ASSUME(status != PSA_ERROR_INSUFFICIENT_MEMORY);
    }
    TEST_EQUAL(status, expected_status);

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(base_key);
    psa_destroy_key(derived_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_setup(int alg_arg,
                         int our_key_type_arg, int our_key_alg_arg,
                         data_t *our_key_data, data_t *peer_key_data,
                         int expected_status_arg)
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t our_key_alg = our_key_alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, our_key_alg);
    psa_set_key_type(&attributes, our_key_type);
    PSA_ASSERT(psa_import_key(&attributes,
                              our_key_data->x, our_key_data->len,
                              &our_key));

    /* The tests currently include inputs that should fail at either step.
     * Test cases that fail at the setup step should be changed to call
     * key_derivation_setup instead, and this function should be renamed
     * to key_agreement_fail. */
    status = psa_key_derivation_setup(&operation, alg);
    if (status == PSA_SUCCESS) {
        TEST_EQUAL(psa_key_derivation_key_agreement(
                       &operation, PSA_KEY_DERIVATION_INPUT_SECRET,
                       our_key,
                       peer_key_data->x, peer_key_data->len),
                   expected_status);
    } else {
        TEST_ASSERT(status == expected_status);
    }

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(our_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void raw_key_agreement(int alg_arg,
                       int our_key_type_arg, data_t *our_key_data,
                       data_t *peer_key_data,
                       data_t *expected_output)
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    unsigned char *output = NULL;
    size_t output_length = ~0;
    size_t key_bits;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, our_key_type);
    PSA_ASSERT(psa_import_key(&attributes,
                              our_key_data->x, our_key_data->len,
                              &our_key));

    PSA_ASSERT(psa_get_key_attributes(our_key, &attributes));
    key_bits = psa_get_key_bits(&attributes);

    /* Validate size macros */
    TEST_LE_U(expected_output->len,
              PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(our_key_type, key_bits));
    TEST_LE_U(PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(our_key_type, key_bits),
              PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE);

    /* Good case with exact output size */
    TEST_CALLOC(output, expected_output->len);
    PSA_ASSERT(psa_raw_key_agreement(alg, our_key,
                                     peer_key_data->x, peer_key_data->len,
                                     output, expected_output->len,
                                     &output_length));
    TEST_MEMORY_COMPARE(output, output_length,
                        expected_output->x, expected_output->len);
    mbedtls_free(output);
    output = NULL;
    output_length = ~0;

    /* Larger buffer */
    TEST_CALLOC(output, expected_output->len + 1);
    PSA_ASSERT(psa_raw_key_agreement(alg, our_key,
                                     peer_key_data->x, peer_key_data->len,
                                     output, expected_output->len + 1,
                                     &output_length));
    TEST_MEMORY_COMPARE(output, output_length,
                        expected_output->x, expected_output->len);
    mbedtls_free(output);
    output = NULL;
    output_length = ~0;

    /* Buffer too small */
    TEST_CALLOC(output, expected_output->len - 1);
    TEST_EQUAL(psa_raw_key_agreement(alg, our_key,
                                     peer_key_data->x, peer_key_data->len,
                                     output, expected_output->len - 1,
                                     &output_length),
               PSA_ERROR_BUFFER_TOO_SMALL);
    /* Not required by the spec, but good robustness */
    TEST_LE_U(output_length, expected_output->len - 1);
    mbedtls_free(output);
    output = NULL;

exit:
    mbedtls_free(output);
    psa_destroy_key(our_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_capacity(int alg_arg,
                            int our_key_type_arg, data_t *our_key_data,
                            data_t *peer_key_data,
                            int expected_capacity_arg)
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t actual_capacity;
    unsigned char output[16];

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, our_key_type);
    PSA_ASSERT(psa_import_key(&attributes,
                              our_key_data->x, our_key_data->len,
                              &our_key));

    PSA_ASSERT(psa_key_derivation_setup(&operation, alg));
    PSA_ASSERT(psa_key_derivation_key_agreement(
                   &operation,
                   PSA_KEY_DERIVATION_INPUT_SECRET, our_key,
                   peer_key_data->x, peer_key_data->len));
    if (PSA_ALG_IS_HKDF(PSA_ALG_KEY_AGREEMENT_GET_KDF(alg))) {
        /* The test data is for info="" */
        PSA_ASSERT(psa_key_derivation_input_bytes(&operation,
                                                  PSA_KEY_DERIVATION_INPUT_INFO,
                                                  NULL, 0));
    }

    /* Test the advertised capacity. */
    PSA_ASSERT(psa_key_derivation_get_capacity(
                   &operation, &actual_capacity));
    TEST_EQUAL(actual_capacity, (size_t) expected_capacity_arg);

    /* Test the actual capacity by reading the output. */
    while (actual_capacity > sizeof(output)) {
        PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                                   output, sizeof(output)));
        actual_capacity -= sizeof(output);
    }
    PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                               output, actual_capacity));
    TEST_EQUAL(psa_key_derivation_output_bytes(&operation, output, 1),
               PSA_ERROR_INSUFFICIENT_DATA);

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(our_key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_output(int alg_arg,
                          int our_key_type_arg, data_t *our_key_data,
                          data_t *peer_key_data,
                          data_t *expected_output1, data_t *expected_output2)
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *actual_output = NULL;

    TEST_CALLOC(actual_output, MAX(expected_output1->len,
                                   expected_output2->len));

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, our_key_type);
    PSA_ASSERT(psa_import_key(&attributes,
                              our_key_data->x, our_key_data->len,
                              &our_key));

    PSA_ASSERT(psa_key_derivation_setup(&operation, alg));
    PSA_ASSERT(psa_key_derivation_key_agreement(
                   &operation,
                   PSA_KEY_DERIVATION_INPUT_SECRET, our_key,
                   peer_key_data->x, peer_key_data->len));
    if (PSA_ALG_IS_HKDF(PSA_ALG_KEY_AGREEMENT_GET_KDF(alg))) {
        /* The test data is for info="" */
        PSA_ASSERT(psa_key_derivation_input_bytes(&operation,
                                                  PSA_KEY_DERIVATION_INPUT_INFO,
                                                  NULL, 0));
    }

    PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                               actual_output,
                                               expected_output1->len));
    TEST_MEMORY_COMPARE(actual_output, expected_output1->len,
                        expected_output1->x, expected_output1->len);
    if (expected_output2->len != 0) {
        PSA_ASSERT(psa_key_derivation_output_bytes(&operation,
                                                   actual_output,
                                                   expected_output2->len));
        TEST_MEMORY_COMPARE(actual_output, expected_output2->len,
                            expected_output2->x, expected_output2->len);
    }

exit:
    psa_key_derivation_abort(&operation);
    psa_destroy_key(our_key);
    PSA_DONE();
    mbedtls_free(actual_output);
}
/* END_CASE */

/* BEGIN_CASE */
void generate_random(int bytes_arg)
{
    size_t bytes = bytes_arg;
    unsigned char *output = NULL;
    unsigned char *changed = NULL;
    size_t i;
    unsigned run;

    TEST_ASSERT(bytes_arg >= 0);

    TEST_CALLOC(output, bytes);
    TEST_CALLOC(changed, bytes);

    PSA_ASSERT(psa_crypto_init());

    /* Run several times, to ensure that every output byte will be
     * nonzero at least once with overwhelming probability
     * (2^(-8*number_of_runs)). */
    for (run = 0; run < 10; run++) {
        if (bytes != 0) {
            memset(output, 0, bytes);
        }
        PSA_ASSERT(psa_generate_random(output, bytes));

        for (i = 0; i < bytes; i++) {
            if (output[i] != 0) {
                ++changed[i];
            }
        }
    }

    /* Check that every byte was changed to nonzero at least once. This
     * validates that psa_generate_random is overwriting every byte of
     * the output buffer. */
    for (i = 0; i < bytes; i++) {
        TEST_ASSERT(changed[i] != 0);
    }

exit:
    PSA_DONE();
    mbedtls_free(output);
    mbedtls_free(changed);
}
/* END_CASE */

/* BEGIN_CASE */
void generate_key(int type_arg,
                  int bits_arg,
                  int usage_arg,
                  int alg_arg,
                  int expected_status_arg,
                  int is_large_key)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_key_usage_t usage = usage_arg;
    size_t bits = bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);
    psa_set_key_bits(&attributes, bits);

    /* Generate a key */
    psa_status_t status = psa_generate_key(&attributes, &key);

    if (is_large_key > 0) {
        TEST_ASSUME(status != PSA_ERROR_INSUFFICIENT_MEMORY);
    }
    TEST_EQUAL(status, expected_status);
    if (expected_status != PSA_SUCCESS) {
        goto exit;
    }

    /* Test the key information */
    PSA_ASSERT(psa_get_key_attributes(key, &got_attributes));
    TEST_EQUAL(psa_get_key_type(&got_attributes), type);
    TEST_EQUAL(psa_get_key_bits(&got_attributes), bits);

    /* Do something with the key according to its type and permitted usage. */
    if (!mbedtls_test_psa_exercise_key(key, usage, alg)) {
        goto exit;
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&got_attributes);

    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_KEY_TYPE_RSA_KEY_PAIR:PSA_WANT_ALG_RSA_PKCS1V15_CRYPT:PSA_WANT_ALG_RSA_PKCS1V15_SIGN:MBEDTLS_GENPRIME */
void generate_key_rsa(int bits_arg,
                      data_t *e_arg,
                      int expected_status_arg)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = PSA_KEY_TYPE_RSA_KEY_PAIR;
    size_t bits = bits_arg;
    psa_key_usage_t usage = PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT;
    psa_algorithm_t alg = PSA_ALG_RSA_PKCS1V15_SIGN_RAW;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *exported = NULL;
    size_t exported_size =
        PSA_EXPORT_KEY_OUTPUT_SIZE(PSA_KEY_TYPE_RSA_PUBLIC_KEY, bits);
    size_t exported_length = SIZE_MAX;
    uint8_t *e_read_buffer = NULL;
    int is_default_public_exponent = 0;
    size_t e_read_size = PSA_KEY_DOMAIN_PARAMETERS_SIZE(type, bits);
    size_t e_read_length = SIZE_MAX;

    if (e_arg->len == 0 ||
        (e_arg->len == 3 &&
         e_arg->x[0] == 1 && e_arg->x[1] == 0 && e_arg->x[2] == 1)) {
        is_default_public_exponent = 1;
        e_read_size = 0;
    }
    TEST_CALLOC(e_read_buffer, e_read_size);
    TEST_CALLOC(exported, exported_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    PSA_ASSERT(psa_set_key_domain_parameters(&attributes, type,
                                             e_arg->x, e_arg->len));
    psa_set_key_bits(&attributes, bits);

    /* Generate a key */
    TEST_EQUAL(psa_generate_key(&attributes, &key), expected_status);
    if (expected_status != PSA_SUCCESS) {
        goto exit;
    }

    /* Test the key information */
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    TEST_EQUAL(psa_get_key_type(&attributes), type);
    TEST_EQUAL(psa_get_key_bits(&attributes), bits);
    PSA_ASSERT(psa_get_key_domain_parameters(&attributes,
                                             e_read_buffer, e_read_size,
                                             &e_read_length));
    if (is_default_public_exponent) {
        TEST_EQUAL(e_read_length, 0);
    } else {
        TEST_MEMORY_COMPARE(e_read_buffer, e_read_length, e_arg->x, e_arg->len);
    }

    /* Do something with the key according to its type and permitted usage. */
    if (!mbedtls_test_psa_exercise_key(key, usage, alg)) {
        goto exit;
    }

    /* Export the key and check the public exponent. */
    PSA_ASSERT(psa_export_public_key(key,
                                     exported, exported_size,
                                     &exported_length));
    {
        uint8_t *p = exported;
        uint8_t *end = exported + exported_length;
        size_t len;
        /*   RSAPublicKey ::= SEQUENCE {
         *      modulus            INTEGER,    -- n
         *      publicExponent     INTEGER  }  -- e
         */
        TEST_EQUAL(0, mbedtls_asn1_get_tag(&p, end, &len,
                                           MBEDTLS_ASN1_SEQUENCE |
                                           MBEDTLS_ASN1_CONSTRUCTED));
        TEST_ASSERT(mbedtls_test_asn1_skip_integer(&p, end, bits, bits, 1));
        TEST_EQUAL(0, mbedtls_asn1_get_tag(&p, end, &len,
                                           MBEDTLS_ASN1_INTEGER));
        if (len >= 1 && p[0] == 0) {
            ++p;
            --len;
        }
        if (e_arg->len == 0) {
            TEST_EQUAL(len, 3);
            TEST_EQUAL(p[0], 1);
            TEST_EQUAL(p[1], 0);
            TEST_EQUAL(p[2], 1);
        } else {
            TEST_MEMORY_COMPARE(p, len, e_arg->x, e_arg->len);
        }
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes() or
     * set by psa_set_key_domain_parameters() thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_key(key);
    PSA_DONE();
    mbedtls_free(e_read_buffer);
    mbedtls_free(exported);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_STORAGE_C */
void persistent_key_load_key_from_storage(data_t *data,
                                          int type_arg, int bits_arg,
                                          int usage_flags_arg, int alg_arg,
                                          int generation_method)
{
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(1, 1);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_key_usage_t usage_flags = usage_flags_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char *first_export = NULL;
    unsigned char *second_export = NULL;
    size_t export_size = PSA_EXPORT_KEY_OUTPUT_SIZE(type, bits);
    size_t first_exported_length;
    size_t second_exported_length;

    if (usage_flags & PSA_KEY_USAGE_EXPORT) {
        TEST_CALLOC(first_export, export_size);
        TEST_CALLOC(second_export, export_size);
    }

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_id(&attributes, key_id);
    psa_set_key_usage_flags(&attributes, usage_flags);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);
    psa_set_key_bits(&attributes, bits);

    switch (generation_method) {
        case IMPORT_KEY:
            /* Import the key */
            PSA_ASSERT(psa_import_key(&attributes, data->x, data->len,
                                      &key));
            break;

        case GENERATE_KEY:
            /* Generate a key */
            PSA_ASSERT(psa_generate_key(&attributes, &key));
            break;

        case DERIVE_KEY:
#if defined(PSA_WANT_ALG_HKDF) && defined(PSA_WANT_ALG_SHA_256)
        {
            /* Create base key */
            psa_algorithm_t derive_alg = PSA_ALG_HKDF(PSA_ALG_SHA_256);
            psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
            psa_set_key_usage_flags(&base_attributes,
                                    PSA_KEY_USAGE_DERIVE);
            psa_set_key_algorithm(&base_attributes, derive_alg);
            psa_set_key_type(&base_attributes, PSA_KEY_TYPE_DERIVE);
            PSA_ASSERT(psa_import_key(&base_attributes,
                                      data->x, data->len,
                                      &base_key));
            /* Derive a key. */
            PSA_ASSERT(psa_key_derivation_setup(&operation, derive_alg));
            PSA_ASSERT(psa_key_derivation_input_key(
                           &operation,
                           PSA_KEY_DERIVATION_INPUT_SECRET, base_key));
            PSA_ASSERT(psa_key_derivation_input_bytes(
                           &operation, PSA_KEY_DERIVATION_INPUT_INFO,
                           NULL, 0));
            PSA_ASSERT(psa_key_derivation_output_key(&attributes,
                                                     &operation,
                                                     &key));
            PSA_ASSERT(psa_key_derivation_abort(&operation));
            PSA_ASSERT(psa_destroy_key(base_key));
            base_key = MBEDTLS_SVC_KEY_ID_INIT;
        }
#else
            TEST_ASSUME(!"KDF not supported in this configuration");
#endif
            break;

        default:
            TEST_FAIL("generation_method not implemented in test");
            break;
    }
    psa_reset_key_attributes(&attributes);

    /* Export the key if permitted by the key policy. */
    if (usage_flags & PSA_KEY_USAGE_EXPORT) {
        PSA_ASSERT(psa_export_key(key,
                                  first_export, export_size,
                                  &first_exported_length));
        if (generation_method == IMPORT_KEY) {
            TEST_MEMORY_COMPARE(data->x, data->len,
                                first_export, first_exported_length);
        }
    }

    /* Shutdown and restart */
    PSA_ASSERT(psa_purge_key(key));
    PSA_DONE();
    PSA_ASSERT(psa_crypto_init());

    /* Check key slot still contains key data */
    PSA_ASSERT(psa_get_key_attributes(key, &attributes));
    TEST_ASSERT(mbedtls_svc_key_id_equal(
                    psa_get_key_id(&attributes), key_id));
    TEST_EQUAL(psa_get_key_lifetime(&attributes),
               PSA_KEY_LIFETIME_PERSISTENT);
    TEST_EQUAL(psa_get_key_type(&attributes), type);
    TEST_EQUAL(psa_get_key_bits(&attributes), bits);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes),
               mbedtls_test_update_key_usage_flags(usage_flags));
    TEST_EQUAL(psa_get_key_algorithm(&attributes), alg);

    /* Export the key again if permitted by the key policy. */
    if (usage_flags & PSA_KEY_USAGE_EXPORT) {
        PSA_ASSERT(psa_export_key(key,
                                  second_export, export_size,
                                  &second_exported_length));
        TEST_MEMORY_COMPARE(first_export, first_exported_length,
                            second_export, second_exported_length);
    }

    /* Do something with the key according to its type and permitted usage. */
    if (!mbedtls_test_psa_exercise_key(key, usage_flags, alg)) {
        goto exit;
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    mbedtls_free(first_export);
    mbedtls_free(second_export);
    psa_key_derivation_abort(&operation);
    psa_destroy_key(base_key);
    psa_destroy_key(key);
    PSA_DONE();
}
/* END_CASE */