Move mbedtls_cipher_info_from_psa to psa_crypto_cipher.c
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/psa_crypto_cipher.c b/library/psa_crypto_cipher.c
index ca91eaa..5440e45 100644
--- a/library/psa_crypto_cipher.c
+++ b/library/psa_crypto_cipher.c
@@ -55,6 +55,98 @@
#define BUILTIN_KEY_TYPE_CHACHA20 1
#endif
+const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
+ psa_algorithm_t alg,
+ psa_key_type_t key_type,
+ size_t key_bits,
+ mbedtls_cipher_id_t* cipher_id )
+{
+ mbedtls_cipher_mode_t mode;
+ mbedtls_cipher_id_t cipher_id_tmp;
+
+ if( PSA_ALG_IS_AEAD( alg ) )
+ alg = PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, 0 );
+
+ if( PSA_ALG_IS_CIPHER( alg ) || PSA_ALG_IS_AEAD( alg ) )
+ {
+ switch( alg )
+ {
+ case PSA_ALG_STREAM_CIPHER:
+ mode = MBEDTLS_MODE_STREAM;
+ break;
+ case PSA_ALG_CTR:
+ mode = MBEDTLS_MODE_CTR;
+ break;
+ case PSA_ALG_CFB:
+ mode = MBEDTLS_MODE_CFB;
+ break;
+ case PSA_ALG_OFB:
+ mode = MBEDTLS_MODE_OFB;
+ break;
+ case PSA_ALG_ECB_NO_PADDING:
+ mode = MBEDTLS_MODE_ECB;
+ break;
+ case PSA_ALG_CBC_NO_PADDING:
+ mode = MBEDTLS_MODE_CBC;
+ break;
+ case PSA_ALG_CBC_PKCS7:
+ mode = MBEDTLS_MODE_CBC;
+ break;
+ case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CCM, 0 ):
+ mode = MBEDTLS_MODE_CCM;
+ break;
+ case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, 0 ):
+ mode = MBEDTLS_MODE_GCM;
+ break;
+ case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CHACHA20_POLY1305, 0 ):
+ mode = MBEDTLS_MODE_CHACHAPOLY;
+ break;
+ default:
+ return( NULL );
+ }
+ }
+ else if( alg == PSA_ALG_CMAC )
+ mode = MBEDTLS_MODE_ECB;
+ else
+ return( NULL );
+
+ switch( key_type )
+ {
+ case PSA_KEY_TYPE_AES:
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_AES;
+ break;
+ case PSA_KEY_TYPE_DES:
+ /* key_bits is 64 for Single-DES, 128 for two-key Triple-DES,
+ * and 192 for three-key Triple-DES. */
+ if( key_bits == 64 )
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_DES;
+ else
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_3DES;
+ /* mbedtls doesn't recognize two-key Triple-DES as an algorithm,
+ * but two-key Triple-DES is functionally three-key Triple-DES
+ * with K1=K3, so that's how we present it to mbedtls. */
+ if( key_bits == 128 )
+ key_bits = 192;
+ break;
+ case PSA_KEY_TYPE_CAMELLIA:
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_CAMELLIA;
+ break;
+ case PSA_KEY_TYPE_ARC4:
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_ARC4;
+ break;
+ case PSA_KEY_TYPE_CHACHA20:
+ cipher_id_tmp = MBEDTLS_CIPHER_ID_CHACHA20;
+ break;
+ default:
+ return( NULL );
+ }
+ if( cipher_id != NULL )
+ *cipher_id = cipher_id_tmp;
+
+ return( mbedtls_cipher_info_from_values( cipher_id_tmp,
+ (int) key_bits, mode ) );
+}
+
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER) || defined(PSA_CRYPTO_DRIVER_TEST)
static psa_status_t cipher_setup(