the real message is passed to functions like L<EVP_DigestSignUpdate(3)> or
L<EVP_DigestVerifyInit(3)>. This is usually required by some public key
signature algorithms like SM2 which requires a hashed prefix to the message to
-be signed. The digest_custom() will be called by L<EVP_DigestSignInit(3)> and
-L<EVP_DigestVerifyInit(3)>.
+be signed. The digest_custom() function will be called by L<EVP_DigestSignInit(3)>
+and L<EVP_DigestVerifyInit(3)>.
=head2 Functions
Copyright 2017-2018 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
L<https://www.openssl.org/source/license.html>.