75 lines
1.6 KiB
Plaintext
75 lines
1.6 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
EVP_sha224,
|
||
|
|
EVP_sha256,
|
||
|
|
EVP_sha512_224,
|
||
|
|
EVP_sha512_256,
|
||
|
|
EVP_sha384,
|
||
|
|
EVP_sha512
|
||
|
|
- SHA-2 For EVP
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
#include <openssl/evp.h>
|
||
|
|
|
||
|
|
const EVP_MD *EVP_sha224(void);
|
||
|
|
const EVP_MD *EVP_sha256(void);
|
||
|
|
const EVP_MD *EVP_sha512_224(void);
|
||
|
|
const EVP_MD *EVP_sha512_256(void);
|
||
|
|
const EVP_MD *EVP_sha384(void);
|
||
|
|
const EVP_MD *EVP_sha512(void);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
SHA-2 (Secure Hash Algorithm 2) is a family of cryptographic hash functions
|
||
|
|
standardized in NIST FIPS 180-4, first published in 2001.
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item EVP_sha224(),
|
||
|
|
EVP_sha256(),
|
||
|
|
EVP_sha512_224,
|
||
|
|
EVP_sha512_256,
|
||
|
|
EVP_sha384(),
|
||
|
|
EVP_sha512()
|
||
|
|
|
||
|
|
The SHA-2 SHA-224, SHA-256, SHA-512/224, SHA512/256, SHA-384 and SHA-512
|
||
|
|
algorithms, which generate 224, 256, 224, 256, 384 and 512 bits
|
||
|
|
respectively of output from a given input.
|
||
|
|
|
||
|
|
The two algorithms: SHA-512/224 and SHA512/256 are truncated forms of the
|
||
|
|
SHA-512 algorithm. They are distinct from SHA-224 and SHA-256 even though
|
||
|
|
their outputs are of the same size.
|
||
|
|
|
||
|
|
=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 2017-2018 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
|
||
|
|
|