1=pod 2 3=head1 NAME 4 5EVP_sha1 6- SHA-1 For EVP 7 8=head1 SYNOPSIS 9 10 #include <openssl/evp.h> 11 12 const EVP_MD *EVP_sha1(void); 13 14=head1 DESCRIPTION 15 16SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function standardized 17in NIST FIPS 180-4. The algorithm was designed by the United States National 18Security Agency and initially published in 1995. 19 20=over 4 21 22=item EVP_sha1() 23 24The SHA-1 algorithm which produces a 160-bit output from a given input. 25 26=back 27 28 29=head1 RETURN VALUES 30 31These functions return a B<EVP_MD> structure that contains the 32implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for 33details of the B<EVP_MD> structure. 34 35=head1 CONFORMING TO 36 37NIST FIPS 180-4. 38 39=head1 SEE ALSO 40 41L<evp(7)>, 42L<EVP_DigestInit(3)> 43 44=head1 COPYRIGHT 45 46Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. 47 48Licensed under the OpenSSL license (the "License"). You may not use 49this file except in compliance with the License. You can obtain a copy 50in the file LICENSE in the source distribution or at 51L<https://www.openssl.org/source/license.html>. 52 53=cut 54 55