=pod =head1 NAME EVP_blake2b512, EVP_blake2s256 - BLAKE2 For EVP =head1 SYNOPSIS #include const EVP_MD *EVP_blake2b512(void); const EVP_MD *EVP_blake2s256(void); =head1 DESCRIPTION BLAKE2 is an improved version of BLAKE, which was submitted to the NIST SHA-3 algorithm competition. The BLAKE2s and BLAKE2b algorithms are described in RFC 7693. =over 4 =item EVP_blake2s256() The BLAKE2s algorithm that produces a 256-bit output from a given input. =item EVP_blake2b512() The BLAKE2b algorithm that produces a 512-bit output from a given input. =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 RFC 7693. =head1 NOTES While the BLAKE2b and BLAKE2s algorithms supports a variable length digest, this implementation outputs a digest of a fixed length (the maximum length supported), which is 512-bits for BLAKE2b and 256-bits for BLAKE2s. =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