=pod =head1 NAME EVP_sha3_224, EVP_sha3_256, EVP_sha3_384, EVP_sha3_512, EVP_shake128, EVP_shake256 - SHA-3 For EVP =head1 SYNOPSIS #include 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); =head1 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. =over 4 =item 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. =item EVP_shake128(), EVP_shake256() The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that can generate a variable hash length. Specifically, B provides an overall security of 128 bits, while B provides that of 256 bits. =back =head1 RETURN VALUES These functions return a B structure that contains the implementation of the symmetric cipher. See L for details of the B structure. =head1 CONFORMING TO NIST FIPS 202. =head1 SEE ALSO L, L =head1 COPYRIGHT Copyright 2017 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 L. =cut