| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | =pod |
| 2 | |
| 3 | =head1 NAME |
| 4 | |
| 5 | EVP_blake2b512, |
| 6 | EVP_blake2s256 |
| 7 | - BLAKE2 For EVP |
| 8 | |
| 9 | =head1 SYNOPSIS |
| 10 | |
| 11 | #include <openssl/evp.h> |
| 12 | |
| 13 | const EVP_MD *EVP_blake2b512(void); |
| 14 | const EVP_MD *EVP_blake2s256(void); |
| 15 | |
| 16 | =head1 DESCRIPTION |
| 17 | |
| 18 | BLAKE2 is an improved version of BLAKE, which was submitted to the NIST SHA-3 |
| 19 | algorithm competition. The BLAKE2s and BLAKE2b algorithms are described in |
| 20 | RFC 7693. |
| 21 | |
| 22 | =over 4 |
| 23 | |
| 24 | =item EVP_blake2s256() |
| 25 | |
| 26 | The BLAKE2s algorithm that produces a 256-bit output from a given input. |
| 27 | |
| 28 | =item EVP_blake2b512() |
| 29 | |
| 30 | The BLAKE2b algorithm that produces a 512-bit output from a given input. |
| 31 | |
| 32 | =back |
| 33 | |
| 34 | =head1 RETURN VALUES |
| 35 | |
| 36 | These functions return a B<EVP_MD> structure that contains the |
| 37 | implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for |
| 38 | details of the B<EVP_MD> structure. |
| 39 | |
| 40 | =head1 CONFORMING TO |
| 41 | |
| 42 | RFC 7693. |
| 43 | |
| 44 | =head1 NOTES |
| 45 | |
| 46 | While the BLAKE2b and BLAKE2s algorithms supports a variable length digest, |
| 47 | this implementation outputs a digest of a fixed length (the maximum length |
| 48 | supported), which is 512-bits for BLAKE2b and 256-bits for BLAKE2s. |
| 49 | |
| 50 | =head1 SEE ALSO |
| 51 | |
| 52 | L<evp(7)>, |
| 53 | L<EVP_DigestInit(3)> |
| 54 | |
| 55 | =head1 COPYRIGHT |
| 56 | |
| 57 | Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. |
| 58 | |
| 59 | Licensed under the OpenSSL license (the "License"). You may not use |
| 60 | this file except in compliance with the License. You can obtain a copy |
| 61 | in the file LICENSE in the source distribution or at |
| 62 | L<https://www.openssl.org/source/license.html>. |
| 63 | |
| 64 | =cut |
| 65 | |