drawterm/libauthsrv/passtokey.c

34 lines
517 B
C

#include <u.h>
#include <libc.h>
#include <authsrv.h>
int
passtokey(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 1;
n -= 8;
t += 8;
if(n < 8){
t -= 8 - n;
n = 8;
}
encrypt(key, t, 8);
}
return 1; /* not reached */
}