blob: 30e6f78782d36aa0947850726ec88dc78bb64525 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
size_t
libsha1_hmac_unmarshal(struct libsha1_hmac_state *restrict state, const void *restrict buf_, size_t bufsize)
{
const char *restrict buf = buf_;
size_t off = 0;
size_t r;
if (bufsize < sizeof(int)) {
errno = EINVAL;
return 0;
}
if (*(const int *)buf) { /* version */
errno = EINVAL;
return 0;
}
off += sizeof(int);
r = libsha1_unmarshal(&state->sha1_state, &buf[off], bufsize - off);
if (!r)
return 0;
off += r;
if (bufsize - off < sizeof(size_t) + sizeof(unsigned char) + sizeof(state->ipad) + sizeof(state->opad)) {
errno = EINVAL;
return 0;
}
state->outsize = *(const size_t *)&buf[off];
off += sizeof(size_t);
state->inited = *(const unsigned char *)&buf[off];
off += sizeof(unsigned char);
memcpy(state->ipad, &buf[off], sizeof(state->ipad));
off += sizeof(state->ipad);
memcpy(state->opad, &buf[off], sizeof(state->opad));
off += sizeof(state->opad);
return off;
}
|
