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Refactor get_sig_alg_from_pk

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu 2022-03-22 15:47:19 +08:00
parent 5512ad9df8
commit dddf5a0e18
1 changed files with 17 additions and 33 deletions
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50
library/ssl_tls13_generic.c
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@ -983,7 +983,9 @@ cleanup:
* STATE HANDLING: Output Certificate Verify
*/
static uint16_t ssl_tls13_get_sig_alg_from_pk( mbedtls_ssl_context *ssl,
mbedtls_pk_context *own_key )
mbedtls_pk_context *own_key,
mbedtls_pk_type_t *pk_type,
mbedtls_md_type_t *md_alg)
{
mbedtls_pk_type_t sig = mbedtls_ssl_sig_from_pk( own_key );
/* Determine the size of the key */
@ -999,12 +1001,18 @@ static uint16_t ssl_tls13_get_sig_alg_from_pk( mbedtls_ssl_context *ssl,
{
case 256:
algorithm = MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256;
*md_alg = MBEDTLS_MD_SHA256;
*pk_type = MBEDTLS_PK_ECDSA;
break;
case 384:
algorithm = MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384;
*md_alg = MBEDTLS_MD_SHA384;
*pk_type = MBEDTLS_PK_ECDSA;
break;
case 521:
algorithm = MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512;
*md_alg = MBEDTLS_MD_SHA512;
*pk_type = MBEDTLS_PK_ECDSA;
break;
default:
MBEDTLS_SSL_DEBUG_MSG( 3,
@ -1023,18 +1031,24 @@ static uint16_t ssl_tls13_get_sig_alg_from_pk( mbedtls_ssl_context *ssl,
MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256 ) )
{
algorithm = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256;
*md_alg = MBEDTLS_MD_SHA256;
*pk_type = MBEDTLS_PK_RSASSA_PSS;
}
else if( own_key_size <= 3072 &&
mbedtls_ssl_sig_alg_is_received( ssl,
MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384 ) )
{
algorithm = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384;
*md_alg = MBEDTLS_MD_SHA384;
*pk_type = MBEDTLS_PK_RSASSA_PSS;
}
else if( own_key_size <= 4096 &&
mbedtls_ssl_sig_alg_is_received( ssl,
MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512 ) )
{
algorithm = MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512;
*md_alg = MBEDTLS_MD_SHA512;
*pk_type = MBEDTLS_PK_RSASSA_PSS;
}
break;
#endif /* MBEDTLS_X509_RSASSA_PSS_SUPPORT */
@ -1098,7 +1112,8 @@ static int ssl_tls13_write_certificate_verify_body( mbedtls_ssl_context *ssl,
* opaque signature<0..2^16-1>;
* } CertificateVerify;
*/
algorithm = ssl_tls13_get_sig_alg_from_pk( ssl, own_key );
algorithm = ssl_tls13_get_sig_alg_from_pk( ssl, own_key,
&pk_type, &md_alg );
if( algorithm == MBEDTLS_TLS1_3_SIG_NONE ||
! mbedtls_ssl_sig_alg_is_received( ssl, algorithm ) )
{
@ -1113,37 +1128,6 @@ static int ssl_tls13_write_certificate_verify_body( mbedtls_ssl_context *ssl,
return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
}
switch( algorithm )
{
#if defined(MBEDTLS_ECDSA_C)
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256:
md_alg = MBEDTLS_MD_SHA256;
pk_type = MBEDTLS_PK_ECDSA;
break;
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384:
md_alg = MBEDTLS_MD_SHA384;
pk_type = MBEDTLS_PK_ECDSA;
break;
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512:
md_alg = MBEDTLS_MD_SHA512;
pk_type = MBEDTLS_PK_ECDSA;
break;
#endif /* MBEDTLS_ECDSA_C */
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256:
md_alg = MBEDTLS_MD_SHA256;
pk_type = MBEDTLS_PK_RSASSA_PSS;
break;
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384:
md_alg = MBEDTLS_MD_SHA384;
pk_type = MBEDTLS_PK_RSASSA_PSS;
break;
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512:
md_alg = MBEDTLS_MD_SHA512;
pk_type = MBEDTLS_PK_RSASSA_PSS;
break;
default:
break;
}
/* Check there is space for the algorithm identifier (2 bytes) and the
* signature length (2 bytes).
*/