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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 | ||
4746f25a | 59 | Licensed under the Apache License 2.0 (the "License"). You may not use |
bbda8ce9 RT |
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 |