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
|
#include <u.h>
#include <libc.h>
#include <authsrv.h>
#include <libsec.h>
static void
passtodeskey(char *key, char *p)
{
uchar buf[ANAMELEN], *t;
int i, n;
n = strlen(p);
if(n >= ANAMELEN)
n = ANAMELEN-1;
memset(buf, ' ', 8);
t = buf;
strncpy((char*)t, p, n);
t[n] = 0;
memset(key, 0, DESKEYLEN);
for(;;){
for(i = 0; i < DESKEYLEN; i++)
key[i] = (t[i] >> i) + (t[i+1] << (8 - (i+1)));
if(n <= 8)
return;
n -= 8;
t += 8;
if(n < 8){
t -= 8 - n;
n = 8;
}
encrypt(key, t, 8);
}
}
static void
passtoaeskey(uchar *key, char *p)
{
static char salt[] = "Plan 9 key derivation";
pbkdf2_hmac_sha1((uchar*)p, strlen(p), (uchar*)salt, sizeof(salt)-1, 9001, key, AESKEYLEN);
}
void
passtokey(Authkey *key, char *p)
{
memset(key, 0, sizeof(Authkey));
passtodeskey(key->des, p);
passtoaeskey(key->aes, p);
}
|
