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Make mbedtls_ssl_psk_derive_premaster() only for when MBEDTLS_USE_PSA_CRYPTO is not selected

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Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong
2022-05-03 17:56:38 +02:00
parent 044a32c4c6
commit 80f6f32495
4 changed files with 51 additions and 27 deletions
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19
library/ssl_tls12_server.c
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@ -4053,12 +4053,31 @@ static int ssl_parse_client_key_exchange( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_DECODE_ERROR );
}
#if defined(MBEDTLS_USE_PSA_CRYPTO)
unsigned char *pms = ssl->handshake->premaster;
unsigned char *pms_end = pms + sizeof( ssl->handshake->premaster );
size_t pms_len;
/* Write length only when we know the actual value */
if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
pms + 2, pms_end - ( pms + 2 ), &pms_len,
ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
return( ret );
}
MBEDTLS_PUT_UINT16_BE( pms_len, pms, 0 );
pms += 2 + pms_len;
MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
#else
if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
ciphersuite_info->key_exchange ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
return( ret );
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
}
else
#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */