mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-10-05 02:56:12 +00:00
334 lines
7.7 KiB
C
334 lines
7.7 KiB
C
/*
|
|
* From Andy Tanenbaum's book "Computer Networks", rewritten in C.
|
|
*
|
|
* Many performance modifications made
|
|
* January 19-22, 1992 by Jawaid Bazyar
|
|
* Copyright 1992-1997, Procyon Inc.
|
|
*
|
|
* $Id: crypt.c,v 1.1 1998/02/09 08:25:33 taubert Exp $
|
|
*
|
|
* This file is formatted with tab stops every 8 columns.
|
|
*/
|
|
|
|
#ifdef __ORCAC__
|
|
/* segment "libc_gen__"; *//* don't segment this until crypt.asm is done */
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/* These symbols have been moved to or are referenced from crypta.asm */
|
|
#ifndef NOTDEFINED
|
|
#define f(i,key,a,x) __crypt_f(i, key, a, x)
|
|
#define transpose(data,t,n) __crypt_transpose(data, t, n)
|
|
#define rotate(key) __crypt_rotate(key)
|
|
#define s_boxes __crypt_s_boxes
|
|
#define rots __crypt_rots
|
|
#define EP __crypt_EP
|
|
#endif
|
|
|
|
struct block {
|
|
unsigned char b_data[64];
|
|
};
|
|
|
|
struct ordering {
|
|
unsigned char o_data[64];
|
|
};
|
|
|
|
static struct block key; /* gdr added "static" */
|
|
|
|
static struct ordering InitialTr = {
|
|
58,50,42,34,26,18,10, 2,60,52,44,36,28,20,12, 4,
|
|
62,54,46,38,30,22,14, 6,64,56,48,40,32,24,16, 8,
|
|
57,49,41,33,25,17, 9, 1,59,51,43,35,27,19,11, 3,
|
|
61,53,45,37,29,21,13, 5,63,55,47,39,31,23,15, 7,
|
|
};
|
|
|
|
static struct ordering FinalTr = {
|
|
40, 8,48,16,56,24,64,32,39, 7,47,15,55,23,63,31,
|
|
38, 6,46,14,54,22,62,30,37, 5,45,13,53,21,61,29,
|
|
36, 4,44,12,52,20,60,28,35, 3,43,11,51,19,59,27,
|
|
34, 2,42,10,50,18,58,26,33, 1,41, 9,49,17,57,25,
|
|
};
|
|
|
|
static struct ordering swap = {
|
|
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,
|
|
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,
|
|
};
|
|
|
|
static struct ordering KeyTr1 = {
|
|
57,49,41,33,25,17, 9, 1,58,50,42,34,26,18,
|
|
10, 2,59,51,43,35,27,19,11, 3,60,52,44,36,
|
|
63,55,47,39,31,23,15, 7,62,54,46,38,30,22,
|
|
14, 6,61,53,45,37,29,21,13, 5,28,20,12, 4,
|
|
};
|
|
|
|
struct ordering KeyTr2 = {
|
|
14,17,11,24, 1, 5, 3,28,15, 6,21,10,
|
|
23,19,12, 4,26, 8,16, 7,27,20,13, 2,
|
|
41,52,31,37,47,55,30,40,51,45,33,48,
|
|
44,49,39,56,34,53,46,42,50,36,29,32,
|
|
};
|
|
|
|
static struct ordering etr = {
|
|
32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
|
|
8, 9,10,11,12,13,12,13,14,15,16,17,
|
|
16,17,18,19,20,21,20,21,22,23,24,25,
|
|
24,25,26,27,28,29,28,29,30,31,32, 1,
|
|
};
|
|
|
|
struct ordering ptr = {
|
|
16, 7,20,21,29,12,28,17, 1,15,23,26, 5,18,31,10,
|
|
2, 8,24,14,32,27, 3, 9,19,13,30, 6,22,11, 4,25,
|
|
};
|
|
|
|
char s_boxes[8][64] = {
|
|
{ 14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7,
|
|
0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8,
|
|
4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0,
|
|
15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13,
|
|
},
|
|
|
|
{ 15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10,
|
|
3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5,
|
|
0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15,
|
|
13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9,
|
|
},
|
|
|
|
{ 10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8,
|
|
13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1,
|
|
13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7,
|
|
1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12,
|
|
},
|
|
|
|
{ 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15,
|
|
13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9,
|
|
10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4,
|
|
3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14,
|
|
},
|
|
|
|
{ 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9,
|
|
14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6,
|
|
4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14,
|
|
11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3,
|
|
},
|
|
|
|
{ 12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11,
|
|
10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8,
|
|
9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6,
|
|
4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13,
|
|
},
|
|
|
|
{ 4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1,
|
|
13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6,
|
|
1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2,
|
|
6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12,
|
|
},
|
|
|
|
{ 13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7,
|
|
1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2,
|
|
7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8,
|
|
2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11,
|
|
},
|
|
};
|
|
|
|
int rots[] = {
|
|
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1,
|
|
};
|
|
|
|
/* transpose, rotate, and f were rewritten in assembly- see crypta.asm */
|
|
#ifndef NOTDEFINED
|
|
void __crypt_f __P((int i, struct block *key, struct block *a, struct block *x));
|
|
void __crypt_transpose __P((struct block *data, struct ordering *t, int n));
|
|
void __crypt_rotate __P((struct block *key));
|
|
#else
|
|
|
|
static
|
|
transpose(data, t, n)
|
|
register struct block *data;
|
|
register struct ordering *t;
|
|
register int n;
|
|
{
|
|
struct block x;
|
|
|
|
memcpy(&x,data,sizeof(struct block));
|
|
/* x = *data; you can't do that in C!!! */
|
|
|
|
while (n-- > 0) {
|
|
data->b_data[n] = x.b_data[t->o_data[n] - 1];
|
|
}
|
|
}
|
|
|
|
static
|
|
rotate(key)
|
|
register struct block *key;
|
|
{
|
|
register unsigned char *p = key->b_data;
|
|
register unsigned char *ep = &(key->b_data[55]);
|
|
int data0 = key->b_data[0], data28 = key->b_data[28];
|
|
|
|
while (p++ < ep) *(p-1) = *p;
|
|
key->b_data[27] = data0;
|
|
key->b_data[55] = data28;
|
|
}
|
|
|
|
#endif
|
|
|
|
struct ordering *EP = &etr;
|
|
|
|
#ifdef NOTDEFINED
|
|
static
|
|
f(i, key, a, x)
|
|
struct block *key, *a;
|
|
register struct block *x;
|
|
{
|
|
struct block e, ikey, y;
|
|
int k;
|
|
register unsigned char *p, *q, *r;
|
|
|
|
memcpy(&e,a,sizeof(struct block));
|
|
/* e = *a; */
|
|
transpose(&e, EP, 48);
|
|
for (k = rots[i]; k; k--) rotate(key);
|
|
memcpy(&ikey,key,sizeof(struct block));
|
|
/* ikey = *key; */
|
|
transpose(&ikey, &KeyTr2, 48);
|
|
p = &(y.b_data[48]);
|
|
q = &(e.b_data[48]);
|
|
r = &(ikey.b_data[48]);
|
|
while (p > y.b_data) {
|
|
*--p = *--q ^ *--r;
|
|
}
|
|
q = x->b_data;
|
|
for (k = 0; k < 8; k++) {
|
|
register int xb, r;
|
|
|
|
r = *p++ << 5;
|
|
r += *p++ << 3;
|
|
r += *p++ << 2;
|
|
r += *p++ << 1;
|
|
r += *p++;
|
|
r += *p++ << 4;
|
|
|
|
xb = s_boxes[k][r];
|
|
|
|
*q++ = (xb >> 3) & 1;
|
|
*q++ = (xb>>2) & 1;
|
|
*q++ = (xb>>1) & 1;
|
|
*q++ = (xb & 1);
|
|
}
|
|
transpose(x, &ptr, 32);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
setkey(register const char *k)
|
|
{
|
|
|
|
key = *((struct block *) k);
|
|
transpose(&key, &KeyTr1, 56);
|
|
}
|
|
|
|
void
|
|
encrypt(char *blck, int edflag)
|
|
{
|
|
register struct block *p = (struct block *) blck;
|
|
register int i;
|
|
|
|
transpose(p, &InitialTr, 64);
|
|
for (i = 15; i>= 0; i--) {
|
|
int j = edflag ? i : 15 - i;
|
|
register int k;
|
|
struct block b, x;
|
|
|
|
memcpy(&b,p,sizeof(struct block));
|
|
/* b = *p; */
|
|
for (k = 31; k >= 0; k--) {
|
|
p->b_data[k] = b.b_data[k + 32];
|
|
}
|
|
f(j, &key, p, &x);
|
|
for (k = 31; k >= 0; k--) {
|
|
p->b_data[k+32] = b.b_data[k] ^ x.b_data[k];
|
|
}
|
|
}
|
|
transpose(p, &swap, 64);
|
|
transpose(p, &FinalTr, 64);
|
|
}
|
|
|
|
char *
|
|
crypt(register const char *pw, const char *salt)
|
|
{
|
|
/* Unfortunately, I had to look at the sources of V7 crypt.
|
|
There was no other way to find out what this routine
|
|
actually does.
|
|
*/
|
|
|
|
char pwb[66];
|
|
static char result[16];
|
|
register char *p = pwb;
|
|
struct ordering new_etr;
|
|
register int i;
|
|
char *pw2;
|
|
|
|
while (*pw && p < &pwb[64]) {
|
|
register int j = 7;
|
|
|
|
while (j--) {
|
|
*p++ = (*pw >> j) & 01;
|
|
}
|
|
pw++;
|
|
*p++ = 0;
|
|
}
|
|
while (p < &pwb[64]) *p++ = 0;
|
|
|
|
setkey(p = pwb);
|
|
|
|
while (p < &pwb[66]) *p++ = 0;
|
|
|
|
new_etr = etr;
|
|
EP = &new_etr;
|
|
for (i = 0; i < 2; i++) {
|
|
register char c = *salt++;
|
|
register int j;
|
|
|
|
result[i] = c;
|
|
if ( c > 'Z') c -= 6 + 7 + '.'; /* c was a lower case letter */
|
|
else if ( c > '9') c -= 7 + '.';/* c was upper case letter */
|
|
else c -= '.'; /* c was digit, '.' or '/'. */
|
|
/* now, 0 <= c <= 63 */
|
|
for (j = 0; j < 6; j++) {
|
|
if ((c >> j) & 01) {
|
|
int t = 6*i + j;
|
|
int temp = new_etr.o_data[t];
|
|
new_etr.o_data[t] = new_etr.o_data[t+24];
|
|
new_etr.o_data[t+24] = temp;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result[1] == 0) result[1] = result[0];
|
|
|
|
for (i = 0; i < 25; i++) encrypt(pwb,0);
|
|
EP = &etr;
|
|
|
|
p = pwb;
|
|
pw2 = result+2;
|
|
while (p < &pwb[66]) {
|
|
register int c = 0;
|
|
register int j = 6;
|
|
|
|
while (j--) {
|
|
c <<= 1;
|
|
c |= *p++;
|
|
}
|
|
c += '.'; /* becomes >= '.' */
|
|
if (c > '9') c += 7; /* not in [./0-9], becomes upper */
|
|
if (c > 'Z') c += 6; /* not in [A-Z], becomes lower */
|
|
*pw2++ = c;
|
|
}
|
|
*pw2 = 0;
|
|
return result;
|
|
}
|