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>.