=head1 NOTES
-For all current standard OpenSSL public key algorithms SHA1 is returned.
+For all current standard OpenSSL public key algorithms SHA256 is returned.
=head1 RETURN VALUES
L<EVP_PKEY_CTX_new(3)>,
L<EVP_PKEY_sign(3)>,
+L<EVP_PKEY_supports_digest_nid(3)>,
L<EVP_PKEY_verify(3)>,
L<EVP_PKEY_verify_recover(3)>,