/*
 *  Benchmark demonstration program
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include "mbedtls/platform.h"

#if !defined(MBEDTLS_TIMING_C)
int main(void)
{
    mbedtls_printf("MBEDTLS_TIMING_C not defined.\n");
    mbedtls_exit(0);
}
#else

#include <string.h>
#include <stdlib.h>

#include "mbedtls/timing.h"

#include "mbedtls/md4.h"
#include "mbedtls/md5.h"
#include "mbedtls/ripemd160.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"

#include "mbedtls/arc4.h"
#include "mbedtls/des.h"
#include "mbedtls/aes.h"
#include "mbedtls/aria.h"
#include "mbedtls/blowfish.h"
#include "mbedtls/camellia.h"
#include "mbedtls/chacha20.h"
#include "mbedtls/gcm.h"
#include "mbedtls/ccm.h"
#include "mbedtls/chachapoly.h"
#include "mbedtls/cmac.h"
#include "mbedtls/poly1305.h"

#include "mbedtls/havege.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/hmac_drbg.h"

#include "mbedtls/rsa.h"
#include "mbedtls/dhm.h"
#include "mbedtls/ecdsa.h"
#include "mbedtls/ecdh.h"

#include "mbedtls/error.h"

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#include "mbedtls/memory_buffer_alloc.h"
#endif

/*
 * For heap usage estimates, we need an estimate of the overhead per allocated
 * block. ptmalloc2/3 (used in gnu libc for instance) uses 2 size_t per block,
 * so use that as our baseline.
 */
#define MEM_BLOCK_OVERHEAD  (2 * sizeof(size_t))

/*
 * Size to use for the alloc buffer if MEMORY_BUFFER_ALLOC_C is defined.
 */
#define HEAP_SIZE       (1u << 16)  /* 64k */

#define BUFSIZE         1024
#define HEADER_FORMAT   "  %-24s :  "
#define TITLE_LEN       25

#define OPTIONS                                                         \
    "md4, md5, ripemd160, sha1, sha256, sha512,\n"                      \
    "arc4, des3, des, camellia, blowfish, chacha20,\n"                  \
    "aes_cbc, aes_gcm, aes_ccm, aes_xts, chachapoly,\n"                 \
    "aes_cmac, des3_cmac, poly1305\n"                                   \
    "havege, ctr_drbg, hmac_drbg\n"                                     \
    "rsa, dhm, ecdsa, ecdh.\n"

#if defined(MBEDTLS_ERROR_C)
#define PRINT_ERROR                                                     \
    mbedtls_strerror(ret, (char *) tmp, sizeof(tmp));          \
    mbedtls_printf("FAILED: %s\n", tmp);
#else
#define PRINT_ERROR                                                     \
    mbedtls_printf("FAILED: -0x%04x\n", (unsigned int) -ret);
#endif

#define TIME_AND_TSC(TITLE, CODE)                                     \
    do {                                                                    \
        unsigned long ii, jj, tsc;                                          \
        int ret = 0;                                                        \
                                                                        \
        mbedtls_printf(HEADER_FORMAT, TITLE);                             \
        fflush(stdout);                                                   \
                                                                        \
        mbedtls_set_alarm(1);                                             \
        for (ii = 1; ret == 0 && !mbedtls_timing_alarmed; ii++)           \
        {                                                                   \
            ret = CODE;                                                     \
        }                                                                   \
                                                                        \
        tsc = mbedtls_timing_hardclock();                                   \
        for (jj = 0; ret == 0 && jj < 1024; jj++)                          \
        {                                                                   \
            ret = CODE;                                                     \
        }                                                                   \
                                                                        \
        if (ret != 0)                                                      \
        {                                                                   \
            PRINT_ERROR;                                                    \
        }                                                                   \
        else                                                                \
        {                                                                   \
            mbedtls_printf("%9lu KiB/s,  %9lu cycles/byte\n",              \
                           ii * BUFSIZE / 1024,                           \
                           (mbedtls_timing_hardclock() - tsc)           \
                           / (jj * BUFSIZE));                          \
        }                                                                   \
    } while (0)

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C) && defined(MBEDTLS_MEMORY_DEBUG)

/* How much space to reserve for the title when printing heap usage results.
 * Updated manually as the output of the following command:
 *
 *  sed -n 's/.*[T]IME_PUBLIC.*"\(.*\)",/\1/p' programs/test/benchmark.c |
 *      awk '{print length+3}' | sort -rn | head -n1
 *
 * This computes the maximum length of a title +3, because we appends "/s" and
 * want at least one space. (If the value is too small, the only consequence
 * is poor alignment.) */
#define TITLE_SPACE 17

#define MEMORY_MEASURE_INIT                                             \
    size_t max_used, max_blocks, max_bytes;                             \
    size_t prv_used, prv_blocks;                                        \
    mbedtls_memory_buffer_alloc_cur_get(&prv_used, &prv_blocks);      \
    mbedtls_memory_buffer_alloc_max_reset();

#define MEMORY_MEASURE_PRINT(title_len)                               \
    mbedtls_memory_buffer_alloc_max_get(&max_used, &max_blocks);      \
    ii = TITLE_SPACE > (title_len) ? TITLE_SPACE - (title_len) : 1;     \
    while (ii--) mbedtls_printf(" ");                                \
    max_used -= prv_used;                                               \
    max_blocks -= prv_blocks;                                           \
    max_bytes = max_used + MEM_BLOCK_OVERHEAD * max_blocks;             \
    mbedtls_printf("%6u heap bytes", (unsigned) max_bytes);

#else
#define MEMORY_MEASURE_INIT
#define MEMORY_MEASURE_PRINT(title_len)
#endif

#define TIME_PUBLIC(TITLE, TYPE, CODE)                                \
    do {                                                                    \
        unsigned long ii;                                                   \
        int ret;                                                            \
        MEMORY_MEASURE_INIT;                                                \
                                                                        \
        mbedtls_printf(HEADER_FORMAT, TITLE);                             \
        fflush(stdout);                                                   \
        mbedtls_set_alarm(3);                                             \
                                                                        \
        ret = 0;                                                            \
        for (ii = 1; !mbedtls_timing_alarmed && !ret; ii++)             \
        {                                                                   \
            CODE;                                                           \
        }                                                                   \
                                                                        \
        if (ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED)               \
        {                                                                   \
            mbedtls_printf("Feature Not Supported. Skipping.\n");         \
            ret = 0;                                                        \
        }                                                                   \
        else if (ret != 0)                                                 \
        {                                                                   \
            PRINT_ERROR;                                                    \
        }                                                                   \
        else                                                                \
        {                                                                   \
            mbedtls_printf("%6lu " TYPE "/s", ii / 3);                    \
            MEMORY_MEASURE_PRINT(sizeof(TYPE) + 1);                     \
            mbedtls_printf("\n");                                         \
        }                                                                   \
    } while (0)

static int myrand(void *rng_state, unsigned char *output, size_t len)
{
    size_t use_len;
    int rnd;

    if (rng_state != NULL) {
        rng_state  = NULL;
    }

    while (len > 0) {
        use_len = len;
        if (use_len > sizeof(int)) {
            use_len = sizeof(int);
        }

        rnd = rand();
        memcpy(output, &rnd, use_len);
        output += use_len;
        len -= use_len;
    }

    return 0;
}

#define CHECK_AND_CONTINUE(R)                                         \
    {                                                                   \
        int CHECK_AND_CONTINUE_ret = (R);                             \
        if (CHECK_AND_CONTINUE_ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED) { \
            mbedtls_printf("Feature not supported. Skipping.\n");     \
            continue;                                                   \
        }                                                               \
        else if (CHECK_AND_CONTINUE_ret != 0) {                        \
            mbedtls_exit(1);                                          \
        }                                                               \
    }

/*
 * Clear some memory that was used to prepare the context
 */
#if defined(MBEDTLS_ECP_C)
void ecp_clear_precomputed(mbedtls_ecp_group *grp)
{
    if (grp->T != NULL) {
        size_t i;
        for (i = 0; i < grp->T_size; i++) {
            mbedtls_ecp_point_free(&grp->T[i]);
        }
        mbedtls_free(grp->T);
    }
    grp->T = NULL;
    grp->T_size = 0;
}
#else
#define ecp_clear_precomputed(g)
#endif

#if defined(MBEDTLS_ECP_C)
static int set_ecp_curve(const char *string, mbedtls_ecp_curve_info *curve)
{
    const mbedtls_ecp_curve_info *found =
        mbedtls_ecp_curve_info_from_name(string);
    if (found != NULL) {
        *curve = *found;
        return 1;
    } else {
        return 0;
    }
}
#endif

unsigned char buf[BUFSIZE];

typedef struct {
    char md4, md5, ripemd160, sha1, sha256, sha512,
         arc4, des3, des,
         aes_cbc, aes_gcm, aes_ccm, aes_xts, chachapoly,
         aes_cmac, des3_cmac,
         aria, camellia, blowfish, chacha20,
         poly1305,
         havege, ctr_drbg, hmac_drbg,
         rsa, dhm, ecdsa, ecdh;
} todo_list;


int main(int argc, char *argv[])
{
    int i;
    unsigned char tmp[200];
    char title[TITLE_LEN];
    todo_list todo;
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
    unsigned char alloc_buf[HEAP_SIZE] = { 0 };
#endif
#if defined(MBEDTLS_ECP_C)
    mbedtls_ecp_curve_info single_curve[2] = {
        { MBEDTLS_ECP_DP_NONE, 0, 0, NULL },
        { MBEDTLS_ECP_DP_NONE, 0, 0, NULL },
    };
    const mbedtls_ecp_curve_info *curve_list = mbedtls_ecp_curve_list();
#endif

#if defined(MBEDTLS_ECP_C)
    (void) curve_list; /* Unused in some configurations where no benchmark uses ECC */
#endif

    if (argc <= 1) {
        memset(&todo, 1, sizeof(todo));
    } else {
        memset(&todo, 0, sizeof(todo));

        for (i = 1; i < argc; i++) {
            if (strcmp(argv[i], "md4") == 0) {
                todo.md4 = 1;
            } else if (strcmp(argv[i], "md5") == 0) {
                todo.md5 = 1;
            } else if (strcmp(argv[i], "ripemd160") == 0) {
                todo.ripemd160 = 1;
            } else if (strcmp(argv[i], "sha1") == 0) {
                todo.sha1 = 1;
            } else if (strcmp(argv[i], "sha256") == 0) {
                todo.sha256 = 1;
            } else if (strcmp(argv[i], "sha512") == 0) {
                todo.sha512 = 1;
            } else if (strcmp(argv[i], "arc4") == 0) {
                todo.arc4 = 1;
            } else if (strcmp(argv[i], "des3") == 0) {
                todo.des3 = 1;
            } else if (strcmp(argv[i], "des") == 0) {
                todo.des = 1;
            } else if (strcmp(argv[i], "aes_cbc") == 0) {
                todo.aes_cbc = 1;
            } else if (strcmp(argv[i], "aes_xts") == 0) {
                todo.aes_xts = 1;
            } else if (strcmp(argv[i], "aes_gcm") == 0) {
                todo.aes_gcm = 1;
            } else if (strcmp(argv[i], "aes_ccm") == 0) {
                todo.aes_ccm = 1;
            } else if (strcmp(argv[i], "chachapoly") == 0) {
                todo.chachapoly = 1;
            } else if (strcmp(argv[i], "aes_cmac") == 0) {
                todo.aes_cmac = 1;
            } else if (strcmp(argv[i], "des3_cmac") == 0) {
                todo.des3_cmac = 1;
            } else if (strcmp(argv[i], "aria") == 0) {
                todo.aria = 1;
            } else if (strcmp(argv[i], "camellia") == 0) {
                todo.camellia = 1;
            } else if (strcmp(argv[i], "blowfish") == 0) {
                todo.blowfish = 1;
            } else if (strcmp(argv[i], "chacha20") == 0) {
                todo.chacha20 = 1;
            } else if (strcmp(argv[i], "poly1305") == 0) {
                todo.poly1305 = 1;
            } else if (strcmp(argv[i], "havege") == 0) {
                todo.havege = 1;
            } else if (strcmp(argv[i], "ctr_drbg") == 0) {
                todo.ctr_drbg = 1;
            } else if (strcmp(argv[i], "hmac_drbg") == 0) {
                todo.hmac_drbg = 1;
            } else if (strcmp(argv[i], "rsa") == 0) {
                todo.rsa = 1;
            } else if (strcmp(argv[i], "dhm") == 0) {
                todo.dhm = 1;
            } else if (strcmp(argv[i], "ecdsa") == 0) {
                todo.ecdsa = 1;
            } else if (strcmp(argv[i], "ecdh") == 0) {
                todo.ecdh = 1;
            }
#if defined(MBEDTLS_ECP_C)
            else if (set_ecp_curve(argv[i], single_curve)) {
                curve_list = single_curve;
            }
#endif
            else {
                mbedtls_printf("Unrecognized option: %s\n", argv[i]);
                mbedtls_printf("Available options: " OPTIONS);
            }
        }
    }

    mbedtls_printf("\n");

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
    mbedtls_memory_buffer_alloc_init(alloc_buf, sizeof(alloc_buf));
#endif
    memset(buf, 0xAA, sizeof(buf));
    memset(tmp, 0xBB, sizeof(tmp));

#if defined(MBEDTLS_MD4_C)
    if (todo.md4) {
        TIME_AND_TSC("MD4", mbedtls_md4_ret(buf, BUFSIZE, tmp));
    }
#endif

#if defined(MBEDTLS_MD5_C)
    if (todo.md5) {
        TIME_AND_TSC("MD5", mbedtls_md5_ret(buf, BUFSIZE, tmp));
    }
#endif

#if defined(MBEDTLS_RIPEMD160_C)
    if (todo.ripemd160) {
        TIME_AND_TSC("RIPEMD160", mbedtls_ripemd160_ret(buf, BUFSIZE, tmp));
    }
#endif

#if defined(MBEDTLS_SHA1_C)
    if (todo.sha1) {
        TIME_AND_TSC("SHA-1", mbedtls_sha1_ret(buf, BUFSIZE, tmp));
    }
#endif

#if defined(MBEDTLS_SHA256_C)
    if (todo.sha256) {
        TIME_AND_TSC("SHA-256", mbedtls_sha256_ret(buf, BUFSIZE, tmp, 0));
    }
#endif

#if defined(MBEDTLS_SHA512_C)
    if (todo.sha512) {
        TIME_AND_TSC("SHA-512", mbedtls_sha512_ret(buf, BUFSIZE, tmp, 0));
    }
#endif

#if defined(MBEDTLS_ARC4_C)
    if (todo.arc4) {
        mbedtls_arc4_context arc4;
        mbedtls_arc4_init(&arc4);
        mbedtls_arc4_setup(&arc4, tmp, 32);
        TIME_AND_TSC("ARC4", mbedtls_arc4_crypt(&arc4, BUFSIZE, buf, buf));
        mbedtls_arc4_free(&arc4);
    }
#endif

#if defined(MBEDTLS_DES_C)
#if defined(MBEDTLS_CIPHER_MODE_CBC)
    if (todo.des3) {
        mbedtls_des3_context des3;
        mbedtls_des3_init(&des3);
        if (mbedtls_des3_set3key_enc(&des3, tmp) != 0) {
            mbedtls_exit(1);
        }
        TIME_AND_TSC("3DES",
                     mbedtls_des3_crypt_cbc(&des3, MBEDTLS_DES_ENCRYPT, BUFSIZE, tmp, buf, buf));
        mbedtls_des3_free(&des3);
    }

    if (todo.des) {
        mbedtls_des_context des;
        mbedtls_des_init(&des);
        if (mbedtls_des_setkey_enc(&des, tmp) != 0) {
            mbedtls_exit(1);
        }
        TIME_AND_TSC("DES",
                     mbedtls_des_crypt_cbc(&des, MBEDTLS_DES_ENCRYPT, BUFSIZE, tmp, buf, buf));
        mbedtls_des_free(&des);
    }

#endif /* MBEDTLS_CIPHER_MODE_CBC */
#if defined(MBEDTLS_CMAC_C)
    if (todo.des3_cmac) {
        unsigned char output[8];
        const mbedtls_cipher_info_t *cipher_info;

        memset(buf, 0, sizeof(buf));
        memset(tmp, 0, sizeof(tmp));

        cipher_info = mbedtls_cipher_info_from_type(MBEDTLS_CIPHER_DES_EDE3_ECB);

        TIME_AND_TSC("3DES-CMAC",
                     mbedtls_cipher_cmac(cipher_info, tmp, 192, buf,
                                         BUFSIZE, output));
    }
#endif /* MBEDTLS_CMAC_C */
#endif /* MBEDTLS_DES_C */

#if defined(MBEDTLS_AES_C)
#if defined(MBEDTLS_CIPHER_MODE_CBC)
    if (todo.aes_cbc) {
        int keysize;
        mbedtls_aes_context aes;
        mbedtls_aes_init(&aes);
        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "AES-CBC-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            CHECK_AND_CONTINUE(mbedtls_aes_setkey_enc(&aes, tmp, keysize));

            TIME_AND_TSC(title,
                         mbedtls_aes_crypt_cbc(&aes, MBEDTLS_AES_ENCRYPT, BUFSIZE, tmp, buf, buf));
        }
        mbedtls_aes_free(&aes);
    }
#endif
#if defined(MBEDTLS_CIPHER_MODE_XTS)
    if (todo.aes_xts) {
        int keysize;
        mbedtls_aes_xts_context ctx;

        mbedtls_aes_xts_init(&ctx);
        for (keysize = 128; keysize <= 256; keysize += 128) {
            mbedtls_snprintf(title, sizeof(title), "AES-XTS-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            CHECK_AND_CONTINUE(mbedtls_aes_xts_setkey_enc(&ctx, tmp, keysize * 2));

            TIME_AND_TSC(title,
                         mbedtls_aes_crypt_xts(&ctx, MBEDTLS_AES_ENCRYPT, BUFSIZE,
                                               tmp, buf, buf));

            mbedtls_aes_xts_free(&ctx);
        }
    }
#endif
#if defined(MBEDTLS_GCM_C)
    if (todo.aes_gcm) {
        int keysize;
        mbedtls_gcm_context gcm;

        mbedtls_gcm_init(&gcm);
        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "AES-GCM-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            mbedtls_gcm_setkey(&gcm, MBEDTLS_CIPHER_ID_AES, tmp, keysize);

            TIME_AND_TSC(title,
                         mbedtls_gcm_crypt_and_tag(&gcm, MBEDTLS_GCM_ENCRYPT, BUFSIZE, tmp,
                                                   12, NULL, 0, buf, buf, 16, tmp));

            mbedtls_gcm_free(&gcm);
        }
    }
#endif
#if defined(MBEDTLS_CCM_C)
    if (todo.aes_ccm) {
        int keysize;
        mbedtls_ccm_context ccm;

        mbedtls_ccm_init(&ccm);
        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "AES-CCM-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            mbedtls_ccm_setkey(&ccm, MBEDTLS_CIPHER_ID_AES, tmp, keysize);

            TIME_AND_TSC(title,
                         mbedtls_ccm_encrypt_and_tag(&ccm, BUFSIZE, tmp,
                                                     12, NULL, 0, buf, buf, tmp, 16));

            mbedtls_ccm_free(&ccm);
        }
    }
#endif
#if defined(MBEDTLS_CHACHAPOLY_C)
    if (todo.chachapoly) {
        mbedtls_chachapoly_context chachapoly;

        mbedtls_chachapoly_init(&chachapoly);
        memset(buf, 0, sizeof(buf));
        memset(tmp, 0, sizeof(tmp));

        mbedtls_snprintf(title, sizeof(title), "ChaCha20-Poly1305");

        mbedtls_chachapoly_setkey(&chachapoly, tmp);

        TIME_AND_TSC(title,
                     mbedtls_chachapoly_encrypt_and_tag(&chachapoly,
                                                        BUFSIZE, tmp, NULL, 0, buf, buf, tmp));

        mbedtls_chachapoly_free(&chachapoly);
    }
#endif
#if defined(MBEDTLS_CMAC_C)
    if (todo.aes_cmac) {
        unsigned char output[16];
        const mbedtls_cipher_info_t *cipher_info;
        mbedtls_cipher_type_t cipher_type;
        int keysize;

        for (keysize = 128, cipher_type = MBEDTLS_CIPHER_AES_128_ECB;
             keysize <= 256;
             keysize += 64, cipher_type++) {
            mbedtls_snprintf(title, sizeof(title), "AES-CMAC-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));

            cipher_info = mbedtls_cipher_info_from_type(cipher_type);

            TIME_AND_TSC(title,
                         mbedtls_cipher_cmac(cipher_info, tmp, keysize,
                                             buf, BUFSIZE, output));
        }

        memset(buf, 0, sizeof(buf));
        memset(tmp, 0, sizeof(tmp));
        TIME_AND_TSC("AES-CMAC-PRF-128",
                     mbedtls_aes_cmac_prf_128(tmp, 16, buf, BUFSIZE,
                                              output));
    }
#endif /* MBEDTLS_CMAC_C */
#endif /* MBEDTLS_AES_C */

#if defined(MBEDTLS_ARIA_C) && defined(MBEDTLS_CIPHER_MODE_CBC)
    if (todo.aria) {
        int keysize;
        mbedtls_aria_context aria;
        mbedtls_aria_init(&aria);
        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "ARIA-CBC-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            mbedtls_aria_setkey_enc(&aria, tmp, keysize);

            TIME_AND_TSC(title,
                         mbedtls_aria_crypt_cbc(&aria, MBEDTLS_ARIA_ENCRYPT,
                                                BUFSIZE, tmp, buf, buf));
        }
        mbedtls_aria_free(&aria);
    }
#endif

#if defined(MBEDTLS_CAMELLIA_C) && defined(MBEDTLS_CIPHER_MODE_CBC)
    if (todo.camellia) {
        int keysize;
        mbedtls_camellia_context camellia;
        mbedtls_camellia_init(&camellia);
        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "CAMELLIA-CBC-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            mbedtls_camellia_setkey_enc(&camellia, tmp, keysize);

            TIME_AND_TSC(title,
                         mbedtls_camellia_crypt_cbc(&camellia, MBEDTLS_CAMELLIA_ENCRYPT,
                                                    BUFSIZE, tmp, buf, buf));
        }
        mbedtls_camellia_free(&camellia);
    }
#endif

#if defined(MBEDTLS_CHACHA20_C)
    if (todo.chacha20) {
        TIME_AND_TSC("ChaCha20", mbedtls_chacha20_crypt(buf, buf, 0U, BUFSIZE, buf, buf));
    }
#endif

#if defined(MBEDTLS_POLY1305_C)
    if (todo.poly1305) {
        TIME_AND_TSC("Poly1305", mbedtls_poly1305_mac(buf, buf, BUFSIZE, buf));
    }
#endif

#if defined(MBEDTLS_BLOWFISH_C) && defined(MBEDTLS_CIPHER_MODE_CBC)
    if (todo.blowfish) {
        int keysize;
        mbedtls_blowfish_context blowfish;
        mbedtls_blowfish_init(&blowfish);

        for (keysize = 128; keysize <= 256; keysize += 64) {
            mbedtls_snprintf(title, sizeof(title), "BLOWFISH-CBC-%d", keysize);

            memset(buf, 0, sizeof(buf));
            memset(tmp, 0, sizeof(tmp));
            mbedtls_blowfish_setkey(&blowfish, tmp, keysize);

            TIME_AND_TSC(title,
                         mbedtls_blowfish_crypt_cbc(&blowfish, MBEDTLS_BLOWFISH_ENCRYPT, BUFSIZE,
                                                    tmp, buf, buf));
        }

        mbedtls_blowfish_free(&blowfish);
    }
#endif

#if defined(MBEDTLS_HAVEGE_C)
    if (todo.havege) {
        mbedtls_havege_state hs;
        mbedtls_havege_init(&hs);
        TIME_AND_TSC("HAVEGE", mbedtls_havege_random(&hs, buf, BUFSIZE));
        mbedtls_havege_free(&hs);
    }
#endif

#if defined(MBEDTLS_CTR_DRBG_C)
    if (todo.ctr_drbg) {
        mbedtls_ctr_drbg_context ctr_drbg;

        mbedtls_ctr_drbg_init(&ctr_drbg);
        if (mbedtls_ctr_drbg_seed(&ctr_drbg, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        TIME_AND_TSC("CTR_DRBG (NOPR)",
                     mbedtls_ctr_drbg_random(&ctr_drbg, buf, BUFSIZE));
        mbedtls_ctr_drbg_free(&ctr_drbg);

        mbedtls_ctr_drbg_init(&ctr_drbg);
        if (mbedtls_ctr_drbg_seed(&ctr_drbg, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        mbedtls_ctr_drbg_set_prediction_resistance(&ctr_drbg, MBEDTLS_CTR_DRBG_PR_ON);
        TIME_AND_TSC("CTR_DRBG (PR)",
                     mbedtls_ctr_drbg_random(&ctr_drbg, buf, BUFSIZE));
        mbedtls_ctr_drbg_free(&ctr_drbg);
    }
#endif

#if defined(MBEDTLS_HMAC_DRBG_C) && \
    (defined(MBEDTLS_SHA1_C) || defined(MBEDTLS_SHA256_C))
    if (todo.hmac_drbg) {
        mbedtls_hmac_drbg_context hmac_drbg;
        const mbedtls_md_info_t *md_info;

        mbedtls_hmac_drbg_init(&hmac_drbg);

#if defined(MBEDTLS_SHA1_C)
        if ((md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1)) == NULL) {
            mbedtls_exit(1);
        }

        if (mbedtls_hmac_drbg_seed(&hmac_drbg, md_info, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        TIME_AND_TSC("HMAC_DRBG SHA-1 (NOPR)",
                     mbedtls_hmac_drbg_random(&hmac_drbg, buf, BUFSIZE));

        if (mbedtls_hmac_drbg_seed(&hmac_drbg, md_info, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        mbedtls_hmac_drbg_set_prediction_resistance(&hmac_drbg,
                                                    MBEDTLS_HMAC_DRBG_PR_ON);
        TIME_AND_TSC("HMAC_DRBG SHA-1 (PR)",
                     mbedtls_hmac_drbg_random(&hmac_drbg, buf, BUFSIZE));
#endif

#if defined(MBEDTLS_SHA256_C)
        if ((md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256)) == NULL) {
            mbedtls_exit(1);
        }

        if (mbedtls_hmac_drbg_seed(&hmac_drbg, md_info, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        TIME_AND_TSC("HMAC_DRBG SHA-256 (NOPR)",
                     mbedtls_hmac_drbg_random(&hmac_drbg, buf, BUFSIZE));

        if (mbedtls_hmac_drbg_seed(&hmac_drbg, md_info, myrand, NULL, NULL, 0) != 0) {
            mbedtls_exit(1);
        }
        mbedtls_hmac_drbg_set_prediction_resistance(&hmac_drbg,
                                                    MBEDTLS_HMAC_DRBG_PR_ON);
        TIME_AND_TSC("HMAC_DRBG SHA-256 (PR)",
                     mbedtls_hmac_drbg_random(&hmac_drbg, buf, BUFSIZE));
#endif
        mbedtls_hmac_drbg_free(&hmac_drbg);
    }
#endif /* MBEDTLS_HMAC_DRBG_C && ( MBEDTLS_SHA1_C || MBEDTLS_SHA256_C ) */

#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME)
    if (todo.rsa) {
        int keysize;
        mbedtls_rsa_context rsa;
        for (keysize = 2048; keysize <= 4096; keysize *= 2) {
            mbedtls_snprintf(title, sizeof(title), "RSA-%d", keysize);

            mbedtls_rsa_init(&rsa, MBEDTLS_RSA_PKCS_V15, 0);
            mbedtls_rsa_gen_key(&rsa, myrand, NULL, keysize, 65537);

            TIME_PUBLIC(title, " public",
                        buf[0] = 0;
                        ret = mbedtls_rsa_public(&rsa, buf, buf));

            TIME_PUBLIC(title, "private",
                        buf[0] = 0;
                        ret = mbedtls_rsa_private(&rsa, myrand, NULL, buf, buf));

            mbedtls_rsa_free(&rsa);
        }
    }
#endif

#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_BIGNUM_C)
    if (todo.dhm) {
        int dhm_sizes[] = { 2048, 3072 };
        static const unsigned char dhm_P_2048[] =
            MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN;
        static const unsigned char dhm_P_3072[] =
            MBEDTLS_DHM_RFC3526_MODP_3072_P_BIN;
        static const unsigned char dhm_G_2048[] =
            MBEDTLS_DHM_RFC3526_MODP_2048_G_BIN;
        static const unsigned char dhm_G_3072[] =
            MBEDTLS_DHM_RFC3526_MODP_3072_G_BIN;

        const unsigned char *dhm_P[] = { dhm_P_2048, dhm_P_3072 };
        const size_t dhm_P_size[] = { sizeof(dhm_P_2048),
                                      sizeof(dhm_P_3072) };

        const unsigned char *dhm_G[] = { dhm_G_2048, dhm_G_3072 };
        const size_t dhm_G_size[] = { sizeof(dhm_G_2048),
                                      sizeof(dhm_G_3072) };

        mbedtls_dhm_context dhm;
        size_t olen;
        for (i = 0; (size_t) i < sizeof(dhm_sizes) / sizeof(dhm_sizes[0]); i++) {
            mbedtls_dhm_init(&dhm);

            if (mbedtls_mpi_read_binary(&dhm.P, dhm_P[i],
                                        dhm_P_size[i]) != 0 ||
                mbedtls_mpi_read_binary(&dhm.G, dhm_G[i],
                                        dhm_G_size[i]) != 0) {
                mbedtls_exit(1);
            }

            dhm.len = mbedtls_mpi_size(&dhm.P);
            mbedtls_dhm_make_public(&dhm, (int) dhm.len, buf, dhm.len, myrand, NULL);
            if (mbedtls_mpi_copy(&dhm.GY, &dhm.GX) != 0) {
                mbedtls_exit(1);
            }

            mbedtls_snprintf(title, sizeof(title), "DHE-%d", dhm_sizes[i]);
            TIME_PUBLIC(title, "handshake",
                        ret |= mbedtls_dhm_make_public(&dhm, (int) dhm.len, buf, dhm.len,
                                                       myrand, NULL);
                        ret |=
                            mbedtls_dhm_calc_secret(&dhm, buf, sizeof(buf), &olen, myrand, NULL));

            mbedtls_snprintf(title, sizeof(title), "DH-%d", dhm_sizes[i]);
            TIME_PUBLIC(title, "handshake",
                        ret |=
                            mbedtls_dhm_calc_secret(&dhm, buf, sizeof(buf), &olen, myrand, NULL));

            mbedtls_dhm_free(&dhm);
        }
    }
#endif

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_SHA256_C)
    if (todo.ecdsa) {
        mbedtls_ecdsa_context ecdsa;
        const mbedtls_ecp_curve_info *curve_info;
        size_t sig_len;

        memset(buf, 0x2A, sizeof(buf));

        for (curve_info = curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            if (!mbedtls_ecdsa_can_do(curve_info->grp_id)) {
                continue;
            }

            mbedtls_ecdsa_init(&ecdsa);

            if (mbedtls_ecdsa_genkey(&ecdsa, curve_info->grp_id, myrand, NULL) != 0) {
                mbedtls_exit(1);
            }
            ecp_clear_precomputed(&ecdsa.grp);

            mbedtls_snprintf(title, sizeof(title), "ECDSA-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "sign",
                        ret =
                            mbedtls_ecdsa_write_signature(&ecdsa, MBEDTLS_MD_SHA256, buf,
                                                          curve_info->bit_size,
                                                          tmp, &sig_len, myrand, NULL));

            mbedtls_ecdsa_free(&ecdsa);
        }

        for (curve_info = curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            if (!mbedtls_ecdsa_can_do(curve_info->grp_id)) {
                continue;
            }

            mbedtls_ecdsa_init(&ecdsa);

            if (mbedtls_ecdsa_genkey(&ecdsa, curve_info->grp_id, myrand, NULL) != 0 ||
                mbedtls_ecdsa_write_signature(&ecdsa, MBEDTLS_MD_SHA256, buf, curve_info->bit_size,
                                              tmp, &sig_len, myrand, NULL) != 0) {
                mbedtls_exit(1);
            }
            ecp_clear_precomputed(&ecdsa.grp);

            mbedtls_snprintf(title, sizeof(title), "ECDSA-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "verify",
                        ret = mbedtls_ecdsa_read_signature(&ecdsa, buf, curve_info->bit_size,
                                                           tmp, sig_len));

            mbedtls_ecdsa_free(&ecdsa);
        }
    }
#endif

#if defined(MBEDTLS_ECDH_C) && defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
    if (todo.ecdh) {
        mbedtls_ecdh_context ecdh;
        mbedtls_mpi z;
        const mbedtls_ecp_curve_info montgomery_curve_list[] = {
#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
            { MBEDTLS_ECP_DP_CURVE25519, 0, 0, "Curve25519" },
#endif
#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
            { MBEDTLS_ECP_DP_CURVE448, 0, 0, "Curve448" },
#endif
            { MBEDTLS_ECP_DP_NONE, 0, 0, 0 }
        };
        const mbedtls_ecp_curve_info *curve_info;
        size_t olen;
        const mbedtls_ecp_curve_info *selected_montgomery_curve_list =
            montgomery_curve_list;

        if (curve_list == (const mbedtls_ecp_curve_info *) &single_curve) {
            mbedtls_ecp_group grp;
            mbedtls_ecp_group_init(&grp);
            if (mbedtls_ecp_group_load(&grp, curve_list->grp_id) != 0) {
                mbedtls_exit(1);
            }
            if (mbedtls_ecp_get_type(&grp) == MBEDTLS_ECP_TYPE_MONTGOMERY) {
                selected_montgomery_curve_list = single_curve;
            } else { /* empty list */
                selected_montgomery_curve_list = single_curve + 1;
            }
            mbedtls_ecp_group_free(&grp);
        }

        for (curve_info = curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            if (!mbedtls_ecdh_can_do(curve_info->grp_id)) {
                continue;
            }

            mbedtls_ecdh_init(&ecdh);

            CHECK_AND_CONTINUE(mbedtls_ecp_group_load(&ecdh.grp, curve_info->grp_id));
            CHECK_AND_CONTINUE(mbedtls_ecdh_make_public(&ecdh, &olen, buf, sizeof(buf),
                                                        myrand, NULL));
            CHECK_AND_CONTINUE(mbedtls_ecp_copy(&ecdh.Qp, &ecdh.Q));
            ecp_clear_precomputed(&ecdh.grp);

            mbedtls_snprintf(title, sizeof(title), "ECDHE-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "handshake",
                        CHECK_AND_CONTINUE(mbedtls_ecdh_make_public(&ecdh, &olen, buf, sizeof(buf),
                                                                    myrand, NULL));
                        CHECK_AND_CONTINUE(mbedtls_ecdh_calc_secret(&ecdh, &olen, buf, sizeof(buf),
                                                                    myrand, NULL)));
            mbedtls_ecdh_free(&ecdh);
        }

        /* Montgomery curves need to be handled separately */
        for (curve_info = selected_montgomery_curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            mbedtls_ecdh_init(&ecdh);
            mbedtls_mpi_init(&z);

            CHECK_AND_CONTINUE(mbedtls_ecp_group_load(&ecdh.grp, curve_info->grp_id));
            CHECK_AND_CONTINUE(mbedtls_ecdh_gen_public(&ecdh.grp, &ecdh.d, &ecdh.Qp, myrand, NULL));

            mbedtls_snprintf(title, sizeof(title), "ECDHE-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "handshake",
                        CHECK_AND_CONTINUE(mbedtls_ecdh_gen_public(&ecdh.grp, &ecdh.d, &ecdh.Q,
                                                                   myrand, NULL));
                        CHECK_AND_CONTINUE(mbedtls_ecdh_compute_shared(&ecdh.grp, &z, &ecdh.Qp,
                                                                       &ecdh.d,
                                                                       myrand, NULL)));

            mbedtls_ecdh_free(&ecdh);
            mbedtls_mpi_free(&z);
        }

        for (curve_info = curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            if (!mbedtls_ecdh_can_do(curve_info->grp_id)) {
                continue;
            }

            mbedtls_ecdh_init(&ecdh);

            CHECK_AND_CONTINUE(mbedtls_ecp_group_load(&ecdh.grp, curve_info->grp_id));
            CHECK_AND_CONTINUE(mbedtls_ecdh_make_public(&ecdh, &olen, buf, sizeof(buf),
                                                        myrand, NULL));
            CHECK_AND_CONTINUE(mbedtls_ecp_copy(&ecdh.Qp, &ecdh.Q));
            CHECK_AND_CONTINUE(mbedtls_ecdh_make_public(&ecdh, &olen, buf, sizeof(buf),
                                                        myrand, NULL));
            ecp_clear_precomputed(&ecdh.grp);

            mbedtls_snprintf(title, sizeof(title), "ECDH-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "handshake",
                        CHECK_AND_CONTINUE(mbedtls_ecdh_calc_secret(&ecdh, &olen, buf, sizeof(buf),
                                                                    myrand, NULL)));
            mbedtls_ecdh_free(&ecdh);
        }

        /* Montgomery curves need to be handled separately */
        for (curve_info = selected_montgomery_curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            mbedtls_ecdh_init(&ecdh);
            mbedtls_mpi_init(&z);

            CHECK_AND_CONTINUE(mbedtls_ecp_group_load(&ecdh.grp, curve_info->grp_id));
            CHECK_AND_CONTINUE(mbedtls_ecdh_gen_public(&ecdh.grp, &ecdh.d, &ecdh.Qp,
                                                       myrand, NULL));
            CHECK_AND_CONTINUE(mbedtls_ecdh_gen_public(&ecdh.grp, &ecdh.d, &ecdh.Q, myrand, NULL));

            mbedtls_snprintf(title, sizeof(title), "ECDH-%s",
                             curve_info->name);
            TIME_PUBLIC(title, "handshake",
                        CHECK_AND_CONTINUE(mbedtls_ecdh_compute_shared(&ecdh.grp, &z, &ecdh.Qp,
                                                                       &ecdh.d,
                                                                       myrand, NULL)));

            mbedtls_ecdh_free(&ecdh);
            mbedtls_mpi_free(&z);
        }
    }
#endif

#if defined(MBEDTLS_ECDH_C)
    if (todo.ecdh) {
        mbedtls_ecdh_context ecdh_srv, ecdh_cli;
        unsigned char buf_srv[BUFSIZE], buf_cli[BUFSIZE];
        const mbedtls_ecp_curve_info *curve_info;
        size_t olen;

        for (curve_info = curve_list;
             curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
             curve_info++) {
            if (!mbedtls_ecdh_can_do(curve_info->grp_id)) {
                continue;
            }

            mbedtls_ecdh_init(&ecdh_srv);
            mbedtls_ecdh_init(&ecdh_cli);

            mbedtls_snprintf(title, sizeof(title), "ECDHE-%s", curve_info->name);
            TIME_PUBLIC(title,
                        "full handshake",
                        const unsigned char *p_srv = buf_srv;

                        CHECK_AND_CONTINUE(mbedtls_ecdh_setup(&ecdh_srv, curve_info->grp_id));
                        CHECK_AND_CONTINUE(mbedtls_ecdh_make_params(&ecdh_srv, &olen, buf_srv,
                                                                    sizeof(buf_srv), myrand, NULL));

                        CHECK_AND_CONTINUE(mbedtls_ecdh_read_params(&ecdh_cli, &p_srv,
                                                                    p_srv + olen));
                        CHECK_AND_CONTINUE(mbedtls_ecdh_make_public(&ecdh_cli, &olen, buf_cli,
                                                                    sizeof(buf_cli), myrand, NULL));

                        CHECK_AND_CONTINUE(mbedtls_ecdh_read_public(&ecdh_srv, buf_cli, olen));
                        CHECK_AND_CONTINUE(mbedtls_ecdh_calc_secret(&ecdh_srv, &olen, buf_srv,
                                                                    sizeof(buf_srv), myrand, NULL));

                        CHECK_AND_CONTINUE(mbedtls_ecdh_calc_secret(&ecdh_cli, &olen, buf_cli,
                                                                    sizeof(buf_cli), myrand, NULL));
                        mbedtls_ecdh_free(&ecdh_cli);

                        mbedtls_ecdh_free(&ecdh_srv);
                        );

        }
    }
#endif

    mbedtls_printf("\n");

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
    mbedtls_memory_buffer_alloc_free();
#endif

#if defined(_WIN32)
    mbedtls_printf("  Press Enter to exit this program.\n");
    fflush(stdout); getchar();
#endif

    mbedtls_exit(0);
}

#endif /* MBEDTLS_TIMING_C */