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.

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 202.

SEE ALSO

       evp(7), EVP_DigestInit(3)

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