Add usage checks in context_load()
@@ -11370,8 +11370,36 @@ int mbedtls_ssl_context_load( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
{
+ /*
+ * The context should have been freshly setup or reset.
+ * Give the user an error in case of obvious misuse.
+ * (Checking session is useful because if won't be NULL if we're
+ * renegotiating, or if the user mistakenly loaded a session first.)
+ */
+ if( ssl->state != MBEDTLS_SSL_HELLO_REQUEST ||
+ ssl->session != NULL )
+ {
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ }
+
+ /*
+ * We can't check that the config matches the initial one, but we can at
+ * least check it matches the requirements for serializing.
+ */
+ if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
+ ssl->conf->max_major_ver < MBEDTLS_SSL_MAJOR_VERSION_3 ||
+ ssl->conf->min_major_ver > MBEDTLS_SSL_MAJOR_VERSION_3 ||
+ ssl->conf->max_minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 ||
+ ssl->conf->min_minor_ver > MBEDTLS_SSL_MINOR_VERSION_3 ||
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ ssl->conf->disable_renegotiation != MBEDTLS_SSL_RENEGOTIATION_DISABLED
+#endif
+ )
+ {
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ }
+
/* Unimplemented */
- (void) ssl;
(void) buf;
(void) len;
