EVP_SHA3_224(3SSL) OpenSSL EVP_SHA3_224(3SSL)
NAME
EVP_sha3_224, EVP_sha3_256, EVP_sha3_384, EVP_sha3_512, EVP_shake128,
EVP_shake256 - SHA-3 For EVP
SYNOPSIS
#include <openssl/evp.h>
const EVP_MD *EVP_sha3_224(void);
const EVP_MD *EVP_sha3_256(void);
const EVP_MD *EVP_sha3_384(void);
const EVP_MD *EVP_sha3_512(void);
const EVP_MD *EVP_shake128(void);
const EVP_MD *EVP_shake256(void);
DESCRIPTION
SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash
functions standardized in NIST FIPS 202, first published in 2015. It is
based on the Keccak algorithm.
EVP_sha3_224(), EVP_sha3_256(), EVP_sha3_384(), EVP_sha3_512()
The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms
respectively. They produce 224, 256, 384 and 512 bits of output from
a given input.
EVP_shake128(), EVP_shake256()
The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that
can generate a variable hash length.
Specifically, EVP_shake128 provides an overall security of 128 bits,
while EVP_shake256 provides that of 256 bits.
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-SHA3(7) or EVP_MD-SHAKE(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 202.
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_SHA3_224(3SSL)
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