2 * Copyright (c) 2018 Thomas Pornin <pornin@bolet.org>
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 br_mgf1_xor(void *data
, size_t len
,
30 const br_hash_class
*dig
, const void *seed
, size_t seed_len
)
37 hlen
= br_digest_size(dig
);
38 for (u
= 0, c
= 0; u
< len
; u
+= hlen
, c
++) {
39 br_hash_compat_context hc
;
40 unsigned char tmp
[64];
44 dig
->init(&hc
.vtable
);
45 dig
->update(&hc
.vtable
, seed
, seed_len
);
47 dig
->update(&hc
.vtable
, tmp
, 4);
48 dig
->out(&hc
.vtable
, tmp
);
49 for (v
= 0; v
< hlen
; v
++) {