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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* sha1.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <me@cacharle.xyz> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/08/02 14:20:39 by charles #+# #+# */
/* Updated: 2020/08/02 15:42:51 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_ssl.h"
void *sha1_compression_func(void *v_state, uint8_t *chunk)
{
uint32_t buf[80] = {0};
size_t i;
uint32_t a, b, c, d, e, f, k, tmp;
uint32_t *state;
for (i = 0; i < 16; i++)
{
buf[i] = chunk[i * 4] << 24;
buf[i] |= chunk[i * 4 + 1] << 16;
buf[i] |= chunk[i * 4 + 2] << 8;
buf[i] |= chunk[i * 4 + 3];
}
/* ft_memcpy(buf, chunk, 64); */
i = 16;
while (i < 80)
{
buf[i] = rotate_left(buf[i - 3] ^ buf[i - 8] ^ buf[i - 14] ^ buf[i - 16], 1);
i++;
}
state = v_state;
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
i = 0;
while (i < 80)
{
if (i < 20)
{
f = (b & c) | ((~b) & d);
k = 0x5a827999;
}
else if (i < 40)
{
f = b ^ c ^ d;
k = 0x6ed9eba1;
}
else if (i < 60)
{
f = (b & c) | (b & d) | (c & d);
k = 0x8f1bbcdc;
}
else
{
f = b ^ c ^ d;
k = 0xca62c1d6;
}
tmp = rotate_left(a, 5) + f + e + k + buf[i];
e = d;
d = c;
c = rotate_left(b, 30);
b = a;
a = tmp;
i++;
}
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
return (state);
}
|
