| =pod |
| |
| =head1 NAME |
| |
| EVP_blake2b512, |
| EVP_blake2s256 |
| - BLAKE2 For EVP |
| |
| =head1 SYNOPSIS |
| |
| #include <openssl/evp.h> |
| |
| 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<EVP_MD> structure that contains the |
| implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for |
| details of the B<EVP_MD> 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<evp(7)>, |
| L<EVP_DigestInit(3)> |
| |
| =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<https://www.openssl.org/source/license.html>. |
| |
| =cut |
| |
