2 * Routines in this file based on the work of Volker Lendecke,
3 * Adapted for ncplib by Boris Popov
4 * Please note that ncpl_crypt.c file should be indentical to this one
6 * $FreeBSD: src/lib/libncp/ncpl_crypt.c,v 1.1 1999/10/12 11:56:39 bp Exp $
10 #include <sys/malloc.h>
13 /*$*********************************************************
15 $* This code has been taken from DDJ 11/93, from an
16 $* article by Pawel Szczerbina.
18 $* Password encryption routines follow.
19 $* Converted to C from Barry Nance's Pascal
20 $* prog published in the March -93 issue of Byte.
22 $* Adapted to be useable for ncpfs by
23 $* Volker Lendecke <lendecke@namu01.gwdg.de> in
26 $********************************************************* */
30 typedef unsigned char buf32[32];
32 static unsigned char encrypttable[256] = {
33 0x7, 0x8, 0x0, 0x8, 0x6, 0x4, 0xE, 0x4, 0x5, 0xC, 0x1, 0x7, 0xB, 0xF, 0xA, 0x8,
34 0xF, 0x8, 0xC, 0xC, 0x9, 0x4, 0x1, 0xE, 0x4, 0x6, 0x2, 0x4, 0x0, 0xA, 0xB, 0x9,
35 0x2, 0xF, 0xB, 0x1, 0xD, 0x2, 0x1, 0x9, 0x5, 0xE, 0x7, 0x0, 0x0, 0x2, 0x6, 0x6,
36 0x0, 0x7, 0x3, 0x8, 0x2, 0x9, 0x3, 0xF, 0x7, 0xF, 0xC, 0xF, 0x6, 0x4, 0xA, 0x0,
37 0x2, 0x3, 0xA, 0xB, 0xD, 0x8, 0x3, 0xA, 0x1, 0x7, 0xC, 0xF, 0x1, 0x8, 0x9, 0xD,
38 0x9, 0x1, 0x9, 0x4, 0xE, 0x4, 0xC, 0x5, 0x5, 0xC, 0x8, 0xB, 0x2, 0x3, 0x9, 0xE,
39 0x7, 0x7, 0x6, 0x9, 0xE, 0xF, 0xC, 0x8, 0xD, 0x1, 0xA, 0x6, 0xE, 0xD, 0x0, 0x7,
40 0x7, 0xA, 0x0, 0x1, 0xF, 0x5, 0x4, 0xB, 0x7, 0xB, 0xE, 0xC, 0x9, 0x5, 0xD, 0x1,
41 0xB, 0xD, 0x1, 0x3, 0x5, 0xD, 0xE, 0x6, 0x3, 0x0, 0xB, 0xB, 0xF, 0x3, 0x6, 0x4,
42 0x9, 0xD, 0xA, 0x3, 0x1, 0x4, 0x9, 0x4, 0x8, 0x3, 0xB, 0xE, 0x5, 0x0, 0x5, 0x2,
43 0xC, 0xB, 0xD, 0x5, 0xD, 0x5, 0xD, 0x2, 0xD, 0x9, 0xA, 0xC, 0xA, 0x0, 0xB, 0x3,
44 0x5, 0x3, 0x6, 0x9, 0x5, 0x1, 0xE, 0xE, 0x0, 0xE, 0x8, 0x2, 0xD, 0x2, 0x2, 0x0,
45 0x4, 0xF, 0x8, 0x5, 0x9, 0x6, 0x8, 0x6, 0xB, 0xA, 0xB, 0xF, 0x0, 0x7, 0x2, 0x8,
46 0xC, 0x7, 0x3, 0xA, 0x1, 0x4, 0x2, 0x5, 0xF, 0x7, 0xA, 0xC, 0xE, 0x5, 0x9, 0x3,
47 0xE, 0x7, 0x1, 0x2, 0xE, 0x1, 0xF, 0x4, 0xA, 0x6, 0xC, 0x6, 0xF, 0x4, 0x3, 0x0,
48 0xC, 0x0, 0x3, 0x6, 0xF, 0x8, 0x7, 0xB, 0x2, 0xD, 0xC, 0x6, 0xA, 0xA, 0x8, 0xD
51 static buf32 encryptkeys = {
52 0x48, 0x93, 0x46, 0x67, 0x98, 0x3D, 0xE6, 0x8D,
53 0xB7, 0x10, 0x7A, 0x26, 0x5A, 0xB9, 0xB1, 0x35,
54 0x6B, 0x0F, 0xD5, 0x70, 0xAE, 0xFB, 0xAD, 0x11,
55 0xF4, 0x47, 0xDC, 0xA7, 0xEC, 0xCF, 0x50, 0xC0
59 * Create table-based 16-bytes hash from a 32-bytes array
62 nw_hash(buf32 temp, unsigned char *target) {
69 for (b2 = 0; b2 <= 1; ++b2) {
70 for (s = 0; s <= 31; ++s) {
71 b3 = (temp[s] + sum) ^ (temp[(s + sum) & 31] - encryptkeys[s]);
77 for (i = 0; i <= 15; ++i) {
78 target[i] = encrypttable[temp[2 * i]]
79 | (encrypttable[temp[2 * i + 1]] << 4);
85 * Create a 16-bytes pattern from given buffer based on a four bytes key
88 nw_keyhash(const u_char *key, const u_char *buf, int buflen, u_char *target) {
92 while (buflen > 0 && buf[buflen - 1] == 0)
95 bzero(temp, sizeof(temp));
98 while (buflen >= 32) {
99 for (s = 0; s <= 31; ++s)
105 for (s = 0; s <= 31; ++s) {
106 if (d + buflen == b2) {
107 temp[s] ^= encryptkeys[s];
110 temp[s] ^= buf[b2++];
113 for (s = 0; s <= 31; ++s)
114 temp[s] ^= key[s & 3];
116 nw_hash(temp, target);
120 * Create an 8-bytes pattern from an 8-bytes key and 16-bytes of data
123 nw_encrypt(const u_char *fra, const u_char *buf, u_char *target) {
127 nw_keyhash(fra, buf, 16, k);
128 nw_keyhash(fra + 4, buf, 16, k + 16);
130 for (s = 0; s < 16; s++)
133 for (s = 0; s < 8; s++)
134 *target++ = k[s] ^ k[15 - s];