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Guard configuration-specific code

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A large block of code is only reachable if MBEDTLS_PK_USE_PSA_EC_DATA is
enabled, i.e. if MBEDTLS_USE_PSA_CRYPTO is enabled with driver-only ECC.
Compilers are likely to figure it out, but still, for clarity and
robustness, do guard that block of code with the appropriate conditional
compilation guard.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2023-12-18 20:38:38 +01:00
parent 29c4017007
commit dc49258c8a
1 changed files with 13 additions and 8 deletions
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21
library/ssl_tls12_server.c
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@ -2631,13 +2631,8 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
ssl->handshake->xxdh_psa_type = psa_get_key_type(&key_attributes);
ssl->handshake->xxdh_psa_bits = psa_get_key_bits(&key_attributes);
if (pk_type == MBEDTLS_PK_OPAQUE) {
/* Opaque key is created by the user (externally from Mbed TLS)
* so we assume it already has the right algorithm and flags
* set. Just copy its ID as reference. */
ssl->handshake->xxdh_psa_privkey = pk->priv_id;
ssl->handshake->xxdh_psa_privkey_is_external = 1;
} else {
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if (pk_type != MBEDTLS_PK_OPAQUE) {
/* PK_ECKEY[_DH] and PK_ECDSA instead as parsed from the PK
* module and only have ECDSA capabilities. Since we need
* them for ECDH later, we export and then re-import them with
@ -2665,10 +2660,20 @@ static int ssl_get_ecdh_params_from_cert(mbedtls_ssl_context *ssl)
/* Set this key as owned by the TLS library: it will be its duty
* to clear it exit. */
ssl->handshake->xxdh_psa_privkey_is_external = 0;
}
ret = 0;
break;
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
/* Opaque key is created by the user (externally from Mbed TLS)
* so we assume it already has the right algorithm and flags
* set. Just copy its ID as reference. */
ssl->handshake->xxdh_psa_privkey = pk->priv_id;
ssl->handshake->xxdh_psa_privkey_is_external = 1;
ret = 0;
break;
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
case MBEDTLS_PK_ECKEY:
case MBEDTLS_PK_ECKEY_DH: