EVP_SHA224

NAME

EVP_sha224, EVP_sha256, EVP_sha512_224, EVP_sha512_256, EVP_sha384, EVP_sha512 − SHA−2 For EVP

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);

DESCRIPTION

SHA−2 (Secure Hash Algorithm 2) is a family of cryptographic hash functions standardized in NIST FIPS 180−4, first published in 2001.
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.

RETURN VALUES

These functions return a EVP_MD structure that contains the implementation of the symmetric cipher. 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 2017−2018 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 <https://www.openssl.org/source/license.html>.