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Introduce mbedtls_ssl_get_ciphersuite_sig_pk_ext_alg() and use it in ssl_pick_cert()

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Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2022-05-12 14:15:06 +02:00
parent e99ec7cb6a
commit 0c9c10a401
3 changed files with 73 additions and 0 deletions
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4
include/mbedtls/ssl_ciphersuites.h
View file

@ -389,6 +389,10 @@ const mbedtls_ssl_ciphersuite_t *mbedtls_ssl_ciphersuite_from_id( int ciphersuit
#if defined(MBEDTLS_PK_C)
mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_pk_alg( const mbedtls_ssl_ciphersuite_t *info );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_algorithm_t mbedtls_ssl_get_ciphersuite_sig_pk_ext_alg( const mbedtls_ssl_ciphersuite_t *info );
psa_key_usage_t mbedtls_ssl_get_ciphersuite_sig_pk_ext_usage( const mbedtls_ssl_ciphersuite_t *info );
#endif
mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info );
#endif

47
library/ssl_ciphersuites.c
View file

@ -1921,6 +1921,53 @@ mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_pk_alg( const mbedtls_ssl_ciph
}
}
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_algorithm_t mbedtls_ssl_get_ciphersuite_sig_pk_ext_alg( const mbedtls_ssl_ciphersuite_t *info )
{
switch( info->key_exchange )
{
case MBEDTLS_KEY_EXCHANGE_RSA:
case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
return( PSA_ALG_RSA_PKCS1V15_CRYPT );
case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
return( PSA_ALG_RSA_PKCS1V15_SIGN(
mbedtls_psa_translate_md( info->mac ) ) );
case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
return( PSA_ALG_ECDSA( mbedtls_psa_translate_md( info->mac ) ) );
case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
return( PSA_ALG_ECDH );
default:
return( PSA_ALG_NONE );
}
}
psa_key_usage_t mbedtls_ssl_get_ciphersuite_sig_pk_ext_usage( const mbedtls_ssl_ciphersuite_t *info )
{
switch( info->key_exchange )
{
case MBEDTLS_KEY_EXCHANGE_RSA:
case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
return( PSA_KEY_USAGE_DECRYPT );
case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
return( PSA_KEY_USAGE_SIGN_HASH );
case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
return( PSA_KEY_USAGE_DERIVE );
default:
return( 0 );
}
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info )
{
switch( info->key_exchange )

22
library/ssl_tls12_server.c
View file

@ -682,8 +682,15 @@ static int ssl_pick_cert( mbedtls_ssl_context *ssl,
const mbedtls_ssl_ciphersuite_t * ciphersuite_info )
{
mbedtls_ssl_key_cert *cur, *list;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_algorithm_t pk_alg =
mbedtls_ssl_get_ciphersuite_sig_pk_ext_alg( ciphersuite_info );
psa_key_usage_t pk_usage =
mbedtls_ssl_get_ciphersuite_sig_pk_ext_usage( ciphersuite_info );
#else
mbedtls_pk_type_t pk_alg =
mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
#endif /* MBEDTLS_USE_PSA_CRYPTO */
uint32_t flags;
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
@ -693,7 +700,11 @@ static int ssl_pick_cert( mbedtls_ssl_context *ssl,
#endif
list = ssl->conf->key_cert;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
if( pk_alg == PSA_ALG_NONE )
#else
if( pk_alg == MBEDTLS_PK_NONE )
#endif /* MBEDTLS_USE_PSA_CRYPTO */
return( 0 );
MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite requires certificate" ) );
@ -710,7 +721,18 @@ static int ssl_pick_cert( mbedtls_ssl_context *ssl,
MBEDTLS_SSL_DEBUG_CRT( 3, "candidate certificate chain, certificate",
cur->cert );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
if( ( ssl->conf->f_async_sign_start == NULL &&
ssl->conf->f_async_decrypt_start == NULL &&
! mbedtls_pk_can_do_ext( cur->key, pk_alg, pk_usage ) ) ||
! mbedtls_pk_can_do_ext( &cur->cert->pk, pk_alg, pk_usage ) )
#else
if( ! mbedtls_pk_can_do_ext( cur->key, pk_alg, pk_usage ) )
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
#else
if( ! mbedtls_pk_can_do( &cur->cert->pk, pk_alg ) )
#endif /* MBEDTLS_USE_PSA_CRYPTO */
{
MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate mismatch: key type" ) );
continue;