plan9port

fork of plan9port with libvec, libstr and libsdb
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passtokey.c (488B)

      1 #include <u.h>
      2 #include <libc.h>
      3 #include <authsrv.h>
      4 
      5 int
      6 passtokey(char *key, char *p)
      7 {
      8 	uchar buf[ANAMELEN], *t;
      9 	int i, n;
     10 
     11 	n = strlen(p);
     12 	if(n >= ANAMELEN)
     13 		n = ANAMELEN-1;
     14 	memset(buf, ' ', 8);
     15 	t = buf;
     16 	strncpy((char*)t, p, n);
     17 	t[n] = 0;
     18 	memset(key, 0, DESKEYLEN);
     19 	for(;;){
     20 		for(i = 0; i < DESKEYLEN; i++)
     21 			key[i] = (t[i] >> i) + (t[i+1] << (8 - (i+1)));
     22 		if(n <= 8)
     23 			return 1;
     24 		n -= 8;
     25 		t += 8;
     26 		if(n < 8){
     27 			t -= 8 - n;
     28 			n = 8;
     29 		}
     30 		encrypt(key, t, 8);
     31 	}
     32 }