libcrypto/man/EVP_sha1.3

 $NetBSD: EVP_sha1.3,v 1.9 2025/04/16 15:23:15 christos Exp $

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 Title "EVP_sha1 3"  EVP_sha1 3 2025-02-11 3.0.16 OpenSSL
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.nh
 NAME
EVP_sha1
\- SHA-1 For EVP
 SYNOPSIS
 Header "SYNOPSIS" .Vb 1
 #include <openssl/evp.h>
\&
 const EVP_MD *EVP_sha1(void);
.Ve
 DESCRIPTION
 Header "DESCRIPTION" SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function standardized
in NIST FIPS 180-4. The algorithm was designed by the United States National
Security Agency and initially published in 1995.
 EVP_sha1() 4
 Item "EVP_sha1()" The SHA-1 algorithm which produces a 160-bit output from a given input.
 NOTES
 Header "NOTES" Developers should be aware of the negative performance implications of
calling this function multiple times and should consider using
\fBEVP_MD_fetch\|(3) with EVP_MD-SHA1\|(7) instead.
See "Performance" in crypto\|(7) for further information.
 "RETURN VALUES"
 Header "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"
 Header "CONFORMING TO" NIST FIPS 180-4.
 "SEE ALSO"
 Header "SEE ALSO" \fBevp\|(7),
\fBEVP_DigestInit\|(3)
 COPYRIGHT
 Header "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>.