1=pod 2 3=head1 NAME 4 5EVP_md5, 6EVP_md5_sha1 7- MD5 For EVP 8 9=head1 SYNOPSIS 10 11 #include <openssl/evp.h> 12 13 const EVP_MD *EVP_md5(void); 14 const EVP_MD *EVP_md5_sha1(void); 15 16=head1 DESCRIPTION 17 18MD5 is a cryptographic hash function standardized in RFC 1321 and designed by 19Ronald Rivest. 20 21The CMU Software Engineering Institute considers MD5 unsuitable for further 22use since its security has been severely compromised. 23 24=over 4 25 26=item EVP_md5() 27 28The MD5 algorithm which produces a 128-bit output from a given input. 29 30=item EVP_md5_sha1() 31 32A hash algorithm of SSL v3 that combines MD5 with SHA-1 as described in RFC 336101. 34 35WARNING: this algorithm is not intended for non-SSL usage. 36 37=back 38 39 40=head1 RETURN VALUES 41 42These functions return a B<EVP_MD> structure that contains the 43implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for 44details of the B<EVP_MD> structure. 45 46=head1 CONFORMING TO 47 48IETF RFC 1321. 49 50=head1 SEE ALSO 51 52L<evp(7)>, 53L<EVP_DigestInit(3)> 54 55=head1 COPYRIGHT 56 57Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved. 58 59Licensed under the OpenSSL license (the "License"). You may not use 60this file except in compliance with the License. You can obtain a copy 61in the file LICENSE in the source distribution or at 62L<https://www.openssl.org/source/license.html>. 63 64=cut 65 66