1=pod 2 3=head1 NAME 4 5EVP_sha3_224, 6EVP_sha3_256, 7EVP_sha3_384, 8EVP_sha3_512, 9EVP_shake128, 10EVP_shake256 11- SHA-3 For EVP 12 13=head1 SYNOPSIS 14 15 #include <openssl/evp.h> 16 17 const EVP_MD *EVP_sha3_224(void); 18 const EVP_MD *EVP_sha3_256(void); 19 const EVP_MD *EVP_sha3_384(void); 20 const EVP_MD *EVP_sha3_512(void); 21 22 const EVP_MD *EVP_shake128(void); 23 const EVP_MD *EVP_shake256(void); 24 25=head1 DESCRIPTION 26 27SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash functions 28standardized in NIST FIPS 202, first published in 2015. It is based on the 29Keccak algorithm. 30 31=over 4 32 33=item EVP_sha3_224(), 34EVP_sha3_256(), 35EVP_sha3_384(), 36EVP_sha3_512() 37 38The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms 39respectively. They produce 224, 256, 384 and 512 bits of output from a given 40input. 41 42=item EVP_shake128(), 43EVP_shake256() 44 45The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that can generate 46a variable hash length. 47 48Specifically, B<EVP_shake128> provides an overall security of 128 bits, while 49B<EVP_shake256> provides that of 256 bits. 50 51=back 52 53 54=head1 RETURN VALUES 55 56These functions return a B<EVP_MD> structure that contains the 57implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for 58details of the B<EVP_MD> structure. 59 60=head1 CONFORMING TO 61 62NIST FIPS 202. 63 64=head1 SEE ALSO 65 66L<evp(7)>, 67L<EVP_DigestInit(3)> 68 69=head1 COPYRIGHT 70 71Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. 72 73Licensed under the OpenSSL license (the "License"). You may not use 74this file except in compliance with the License. You can obtain a copy 75in the file LICENSE in the source distribution or at 76L<https://www.openssl.org/source/license.html>. 77 78=cut 79 80