EVP_MD5(3SSL) OpenSSL EVP_MD5(3SSL)
NAME
EVP_md5, EVP_md5_sha1 - MD5 For EVP
SYNOPSIS
#include <openssl/evp.h>
const EVP_MD *EVP_md5(void);
const EVP_MD *EVP_md5_sha1(void);
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.
EVP_md5()
The MD5 algorithm which produces a 128-bit output from a given
input.
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.
NOTES
Developers should be aware of the negative performance implications of
calling these functions multiple times and should consider using
EVP_MD_fetch(3) with EVP_MD-MD5(7) or EVP_MD-MD5-SHA1(7) instead. See
"Performance" in crypto(7) for further information.
RETURN VALUES
These functions return a EVP_MD structure that contains the
implementation of the message digest. See EVP_MD_meth_new(3) for details
of the EVP_MD structure.
CONFORMING TO
IETF RFC 1321.
SEE ALSO
evp(7), EVP_DigestInit(3)
COPYRIGHT
Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
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
<https://www.openssl.org/source/license.html>.
3.5.7 2026-06-09 EVP_MD5(3SSL)
Generated by dwww version 1.16 on Sat Oct 3 05:12:34 CEST 2026.