/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
return 0;
}
+ /*
+ * The HMAC construction is not allowed to be used with the
+ * extendable-output functions (XOF) shake128 and shake256.
+ */
+ if ((EVP_MD_meth_get_flags(md) & EVP_MD_FLAG_XOF) != 0)
+ return 0;
+
if (key != NULL) {
reset = 1;
j = EVP_MD_block_size(md);