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Adding early ECDHE key generation to ssl_cli.c

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This commit is contained in:
Hannes Tschofenig 2020-12-03 17:37:49 +01:00
parent c34d9cf37a
commit e151a3528a
1 changed files with 12 additions and 0 deletions
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12
library/ssl_cli.c
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@ -3661,11 +3661,15 @@ static int ssl_out_client_key_exchange_write( mbedtls_ssl_context *ssl,
*p++ = 2 * NUM_ECC_BYTES + 1;
*p++ = 0x04; /* uncompressed point presentation */
#if defined(MBEDTLS_EARLY_KEY_COMPUTATION) && defined(MBEDTLS_USE_TINYCRYPT)
memcpy( p, ssl->handshake->ecdh_publickey, 2 * NUM_ECC_BYTES );
#else
ret = uECC_make_key( p, ssl->handshake->ecdh_privkey );
if( ret == UECC_FAULT_DETECTED )
return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
if( ret != UECC_SUCCESS )
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
#endif /* MBEDTLS_EARLY_KEY_COMPUTATION && MBEDTLS_USE_TINYCRYPT */
p += 2 * NUM_ECC_BYTES;
}
else
@ -4272,6 +4276,14 @@ int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl )
* ServerHelloDone
*/
case MBEDTLS_SSL_SERVER_HELLO:
#if defined(MBEDTLS_EARLY_KEY_COMPUTATION) && defined(MBEDTLS_USE_TINYCRYPT)
ret = uECC_make_key( ssl->handshake->ecdh_publickey, ssl->handshake->ecdh_privkey );
if( ret == UECC_FAULT_DETECTED )
return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
if( ret != UECC_SUCCESS )
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
#endif /* MBEDTLS_EARLY_KEY_COMPUTATION && MBEDTLS_USE_TINYCRYPT */
ret = ssl_parse_server_hello( ssl );
break;