=pod

=head1 NAME

EVP_sha1

- SHA-1 For EVP

=head1 SYNOPSIS

 #include <openssl/evp.h>

 const EVP_MD *EVP_sha1(void);

=head1 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.

=over 4

=item EVP_sha1()

The SHA-1 algorithm which produces a 160-bit output from a given input.

=back

=head1 RETURN VALUES

These functions return a B<EVP_MD> structure that contains the

implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for

details of the B<EVP_MD> structure.

=head1 CONFORMING TO

NIST FIPS 180-4.

=head1 SEE ALSO

L<evp(7)>,

L<EVP_DigestInit(3)>

=head1 COPYRIGHT

Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (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

L<https://www.openssl.org/source/license.html>.

=cut