SHA224(), SHA256(), SHA384() and SHA512() functions are not thread safe if
B<md> is NULL.
-The predecessor of SHA-1, SHA, is also implemented, but it should be
-used only when backward compatibility is required.
-
=head1 RETURN VALUES
SHA1(), SHA224(), SHA256(), SHA384() and SHA512() return a pointer to the hash
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy