Add set outbound transform
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index 6559bc9..dd6677d 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -27,6 +27,7 @@
#include "mbedtls/hkdf.h"
#include "mbedtls/debug.h"
#include "mbedtls/error.h"
+#include "mbedtls/platform.h"
#include "ssl_misc.h"
#include "ssl_tls13_keys.h"
@@ -1510,4 +1511,58 @@
return( ret );
}
+int mbedtls_ssl_tls13_set_handshake_transform( mbedtls_ssl_context *ssl )
+{
+ int ret;
+ mbedtls_ssl_key_set traffic_keys;
+ mbedtls_ssl_transform *transform_handshake = NULL;
+ mbedtls_ssl_handshake_params *handshake = ssl->handshake;
+
+ /* Compute handshake secret */
+ ret = mbedtls_ssl_tls13_key_schedule_stage_handshake( ssl );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_derive_master_secret", ret );
+ goto cleanup;
+ }
+
+ /* Next evolution in key schedule: Establish handshake secret and
+ * key material. */
+ ret = mbedtls_ssl_tls13_generate_handshake_keys( ssl, &traffic_keys );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_generate_handshake_keys",
+ ret );
+ goto cleanup;
+ }
+
+ transform_handshake = mbedtls_calloc( 1, sizeof( mbedtls_ssl_transform ) );
+ if( transform_handshake == NULL )
+ {
+ ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
+ goto cleanup;
+ }
+
+ ret = mbedtls_ssl_tls13_populate_transform( transform_handshake,
+ ssl->conf->endpoint,
+ ssl->session_negotiate->ciphersuite,
+ &traffic_keys,
+ ssl );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_populate_transform", ret );
+ goto cleanup;
+ }
+ handshake->transform_handshake = transform_handshake;
+
+cleanup:
+ mbedtls_platform_zeroize( &traffic_keys, sizeof( traffic_keys ) );
+ if( ret != 0 )
+ {
+ mbedtls_free( transform_handshake );
+ }
+
+ return( ret );
+}
+
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */