xref: /freebsd/crypto/openssl/doc/man3/EVP_md5.pod (revision da327cd22e88f26f6cab9d4c45805b512139aa11)

=pod

=head1 NAME

EVP_md5,
EVP_md5_sha1
- MD5 For EVP

=head1 SYNOPSIS

 #include <openssl/evp.h>

 const EVP_MD *EVP_md5(void);
 const EVP_MD *EVP_md5_sha1(void);

=head1 DESCRIPTION

MD5 is a cryptographic hash function standardized in RFC 1321 and designed by
Ronald Rivest.

The CMU Software Engineering Institute considers MD5 unsuitable for further
use since its security has been severely compromised.

=over 4

=item EVP_md5()

The MD5 algorithm which produces a 128-bit output from a given input.

=item EVP_md5_sha1()

A hash algorithm of SSL v3 that combines MD5 with SHA-1 as described in RFC
6101.

WARNING: this algorithm is not intended for non-SSL usage.

=back


=head1 RETURN VALUES

These functions return a B<EVP_MD> structure that contains the
implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
details of the B<EVP_MD> structure.

=head1 CONFORMING TO

IETF RFC 1321.

=head1 SEE ALSO

L<evp(7)>,
L<EVP_DigestInit(3)>

=head1 COPYRIGHT

Copyright 2017-2019 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
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.

=cut