| =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 NOTES |
| |
| Developers should be aware of the negative performance implications of |
| calling these functions multiple times and should consider using |
| L<EVP_MD_fetch(3)> with L<EVP_MD-BLAKE2(7)> instead. |
| See L<crypto(7)/Performance> for further information. |
| |
| Both algorithms support a variable-length digest, |
| but this is only available through L<EVP_MD-BLAKE2(7)>. |
| |
| =head1 RETURN VALUES |
| |
| These functions return a B<EVP_MD> structure that contains the |
| implementation of the message digest. See L<EVP_MD_meth_new(3)> for |
| details of the B<EVP_MD> structure. |
| |
| =head1 CONFORMING TO |
| |
| RFC 7693. |
| |
| =head1 SEE ALSO |
| |
| L<evp(7)>, |
| L<EVP_DigestInit(3)> |
| |
| =head1 COPYRIGHT |
| |
| Copyright 2017-2023 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 |
| |
