EVP_SHA224(3SSL) OpenSSL EVP_SHA224(3SSL)
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.
NOTES
Developers should be aware of the negative performance implications of
calling these functions multiple times and should consider using
EVP_MD_fetch(3) with EVP_MD-SHA2(7)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>.
3.5.7 2026-06-09 EVP_SHA224(3SSL)
Generated by dwww version 1.16 on Sat Oct 3 05:09:14 CEST 2026.