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EVP_SHA1(3ossl) OpenSSL EVP_SHA1(3ossl)
NAME
EVP_sha1 - SHA-1 For EVP
SYNOPSIS
#include <openssl/evp.h>
const EVP_MD *EVP_sha1(void);
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()
The SHA-1 algorithm which produces a 160-bit output from a given
input.
NOTES
Developers should be aware of the negative performance implications of
calling this function multiple times and should consider using
EVP_MD_fetch(3) 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
NIST FIPS 180-4.
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>.
3.0.11 2023-09-19 EVP_SHA1(3ossl)