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tls/x509: minor enhancement for using the new private key format

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2023-05-18 18:59:06 +02:00
parent ae8c628edb
commit 972077820b
4 changed files with 36 additions and 14 deletions
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9
library/ssl_tls.c
View file

@ -7388,13 +7388,18 @@ static int ssl_parse_certificate_verify(mbedtls_ssl_context *ssl,
/* and in the unlikely case the above assumption no longer holds
* we are making sure that pk_ec() here does not return a NULL
*/
mbedtls_ecp_group_id grp_id;
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
grp_id = mbedtls_ecc_group_of_psa(pk->ec_family, pk->ec_bits, 0);
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
const mbedtls_ecp_keypair *ec = mbedtls_pk_ec_ro(*pk);
if (ec == NULL) {
MBEDTLS_SSL_DEBUG_MSG(1, ("mbedtls_pk_ec_ro() returned NULL"));
return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
}
if (mbedtls_ssl_check_curve(ssl, ec->grp.id) != 0) {
grp_id = ec->grp.id;
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
if (mbedtls_ssl_check_curve(ssl, grp_id) != 0) {
ssl->session_negotiate->verify_result |=
MBEDTLS_X509_BADCERT_BAD_KEY;

20
library/ssl_tls12_client.c
View file

@ -1986,7 +1986,6 @@ MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
const mbedtls_ecp_keypair *peer_key;
mbedtls_pk_context *peer_pk;
#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
@ -2007,21 +2006,24 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
return MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH;
}
peer_key = mbedtls_pk_ec_ro(*peer_pk);
#if defined(MBEDTLS_ECP_C)
const mbedtls_ecp_keypair *peer_key = mbedtls_pk_ec_ro(*peer_pk);
#endif /* MBEDTLS_ECP_C */
#if defined(MBEDTLS_USE_PSA_CRYPTO)
uint16_t tls_id = 0;
psa_ecc_family_t ecc_family;
mbedtls_ecp_group_id grp_id = mbedtls_pk_get_group_id(peer_pk);
if (mbedtls_ssl_check_curve(ssl, peer_key->grp.id) != 0) {
if (mbedtls_ssl_check_curve(ssl, grp_id) != 0) {
MBEDTLS_SSL_DEBUG_MSG(1, ("bad server certificate (ECDH curve)"));
return MBEDTLS_ERR_SSL_BAD_CERTIFICATE;
}
tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id(peer_key->grp.id);
tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id(grp_id);
if (tls_id == 0) {
MBEDTLS_SSL_DEBUG_MSG(1, ("ECC group %u not suported",
peer_key->grp.id));
grp_id));
return MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER;
}
@ -2037,7 +2039,7 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
memcpy(ssl->handshake->ecdh_psa_peerkey, peer_pk->pub_raw, peer_pk->pub_raw_len);
ssl->handshake->ecdh_psa_peerkey_len = peer_pk->pub_raw_len;
ret = 0;
#else
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
size_t olen = 0;
ret = mbedtls_ecp_point_write_binary(&peer_key->grp, &peer_key->Q,
MBEDTLS_ECP_PF_UNCOMPRESSED, &olen,
@ -2049,8 +2051,8 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
return ret;
}
ssl->handshake->ecdh_psa_peerkey_len = olen;
#endif /* MBEDTLS_ECP_C */
#else
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
#else /* MBEDTLS_USE_PSA_CRYPTO */
if ((ret = mbedtls_ecdh_get_params(&ssl->handshake->ecdh_ctx, peer_key,
MBEDTLS_ECDH_THEIRS)) != 0) {
MBEDTLS_SSL_DEBUG_RET(1, ("mbedtls_ecdh_get_params"), ret);
@ -2061,7 +2063,7 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
MBEDTLS_SSL_DEBUG_MSG(1, ("bad server certificate (ECDH curve)"));
return MBEDTLS_ERR_SSL_BAD_CERTIFICATE;
}
#endif
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
/* We don't need the peer's public key anymore. Free it,
* so that more RAM is available for upcoming expensive

19
library/ssl_tls12_server.c
View file

@ -2600,7 +2600,10 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
psa_ecc_family_t ecc_family;
size_t key_len;
mbedtls_pk_context *pk;
mbedtls_ecp_group_id grp_id;
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
mbedtls_ecp_keypair *key;
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
pk = mbedtls_ssl_own_key(ssl);
@ -2636,12 +2639,16 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
case MBEDTLS_PK_ECKEY:
case MBEDTLS_PK_ECKEY_DH:
case MBEDTLS_PK_ECDSA:
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
grp_id = mbedtls_ecc_group_of_psa(pk->ec_family, pk->ec_bits, 0);
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
key = mbedtls_pk_ec_rw(*pk);
if (key == NULL) {
return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
}
tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id(key->grp.id);
grp_id = key->grp.id;
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id(grp_id);
if (tls_id == 0) {
/* This elliptic curve is not supported */
return MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE;
@ -2661,11 +2668,19 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
PSA_KEY_TYPE_ECC_KEY_PAIR(ssl->handshake->ecdh_psa_type));
psa_set_key_bits(&key_attributes, ssl->handshake->ecdh_bits);
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
status = psa_export_key(pk->priv_id, buf, sizeof(buf), &key_len);
if (status != PSA_SUCCESS) {
ret = PSA_TO_MBEDTLS_ERR(status);
goto cleanup;
}
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
key_len = PSA_BITS_TO_BYTES(key->grp.pbits);
ret = mbedtls_ecp_write_key(key, buf, key_len);
if (ret != 0) {
goto cleanup;
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
status = psa_import_key(&key_attributes, buf, key_len,
&ssl->handshake->ecdh_psa_privkey);

2
library/x509_crt.c
View file

@ -238,7 +238,7 @@ static int x509_profile_check_key(const mbedtls_x509_crt_profile *profile,
if (pk_alg == MBEDTLS_PK_ECDSA ||
pk_alg == MBEDTLS_PK_ECKEY ||
pk_alg == MBEDTLS_PK_ECKEY_DH) {
const mbedtls_ecp_group_id gid = mbedtls_pk_ec_ro(*pk)->grp.id;
const mbedtls_ecp_group_id gid = mbedtls_pk_get_group_id(pk);
if (gid == MBEDTLS_ECP_DP_NONE) {
return -1;