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- .\" -*- mode: troff; coding: utf-8 -*-
- .\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
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- .IX Title "EVP_MD5 3ossl"
- .TH EVP_MD5 3ossl 2025-01-17 3.4.0 OpenSSL
- .\" For nroff, turn off justification. Always turn off hyphenation; it makes
- .\" way too many mistakes in technical documents.
- .if n .ad l
- .nh
- .SH NAME
- EVP_md5,
- EVP_md5_sha1
- \&\- MD5 For EVP
- .SH SYNOPSIS
- .IX Header "SYNOPSIS"
- .Vb 1
- \& #include <openssl/evp.h>
- \&
- \& const EVP_MD *EVP_md5(void);
- \& const EVP_MD *EVP_md5_sha1(void);
- .Ve
- .SH DESCRIPTION
- .IX Header "DESCRIPTION"
- MD5 is a cryptographic hash function standardized in RFC 1321 and designed by
- Ronald Rivest.
- .PP
- The CMU Software Engineering Institute considers MD5 unsuitable for further
- use since its security has been severely compromised.
- .IP \fBEVP_md5()\fR 4
- .IX Item "EVP_md5()"
- The MD5 algorithm which produces a 128\-bit output from a given input.
- .IP \fBEVP_md5_sha1()\fR 4
- .IX Item "EVP_md5_sha1()"
- A hash algorithm of SSL v3 that combines MD5 with SHA\-1 as described in RFC
- 6101.
- .Sp
- WARNING: this algorithm is not intended for non-SSL usage.
- .SH NOTES
- .IX Header "NOTES"
- Developers should be aware of the negative performance implications of
- calling these functions multiple times and should consider using
- \&\fBEVP_MD_fetch\fR\|(3) with \fBEVP_MD\-MD5\fR\|(7) or \fBEVP_MD\-MD5\-SHA1\fR\|(7) instead.
- See "Performance" in \fBcrypto\fR\|(7) for further information.
- .SH "RETURN VALUES"
- .IX Header "RETURN VALUES"
- These functions return a \fBEVP_MD\fR structure that contains the
- implementation of the message digest. See \fBEVP_MD_meth_new\fR\|(3) for
- details of the \fBEVP_MD\fR structure.
- .SH "CONFORMING TO"
- .IX Header "CONFORMING TO"
- IETF RFC 1321.
- .SH "SEE ALSO"
- .IX Header "SEE ALSO"
- \&\fBevp\fR\|(7),
- \&\fBEVP_DigestInit\fR\|(3)
- .SH COPYRIGHT
- .IX Header "COPYRIGHT"
- Copyright 2017\-2023 The OpenSSL Project Authors. All Rights Reserved.
- .PP
- 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>.
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