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1/* $OpenBSD: fcrypt.c,v 1.17 2024/08/31 15:39:33 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60
61/* This version of crypt has been developed from my MIT compatible
62 * DES library.
63 * Eric Young (eay@cryptsoft.com)
64 */
65
66/* Modification by Jens Kupferschmidt (Cu)
67 * I have included directive PARA for shared memory computers.
68 * I have included a directive LONGCRYPT to using this routine to cipher
69 * passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN
70 * definition is the maximum of length of password and can changed. I have
71 * defined 24.
72 */
73
74#define DES_FCRYPT
75#include "des_local.h"
76#undef DES_FCRYPT
77
78#ifndef OPENBSD_DES_ASM
79
80#undef PERM_OP
81#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)), \
82 (b)^=(t), \
83 (a)^=((t)<<(n)))
84
85#undef HPERM_OP
86#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)), \
87 (a)=(a)^(t)^(t>>(16-(n)))) \
88
89void
90fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0,
91 DES_LONG Eswap1)
92{
93 DES_LONG l, r, t, u;
94#ifdef DES_PTR
95 const unsigned char *des_SP = (const unsigned char *)DES_SPtrans;
96#endif
97 DES_LONG *s;
98 int j;
99 DES_LONG E0, E1;
100
101 l = 0;
102 r = 0;
103
104 s = (DES_LONG *)ks;
105 E0 = Eswap0;
106 E1 = Eswap1;
107
108 for (j = 0; j < 25; j++) {
109#ifndef DES_UNROLL
110 int i;
111
112 for (i = 0; i < 32; i += 4) {
113 D_ENCRYPT(l, r, i + 0); /* 1 */
114 D_ENCRYPT(r, l, i + 2); /* 2 */
115 }
116#else
117 D_ENCRYPT(l, r, 0); /* 1 */
118 D_ENCRYPT(r, l, 2); /* 2 */
119 D_ENCRYPT(l, r, 4); /* 3 */
120 D_ENCRYPT(r, l, 6); /* 4 */
121 D_ENCRYPT(l, r, 8); /* 5 */
122 D_ENCRYPT(r, l, 10); /* 6 */
123 D_ENCRYPT(l, r, 12); /* 7 */
124 D_ENCRYPT(r, l, 14); /* 8 */
125 D_ENCRYPT(l, r, 16); /* 9 */
126 D_ENCRYPT(r, l, 18); /* 10 */
127 D_ENCRYPT(l, r, 20); /* 11 */
128 D_ENCRYPT(r, l, 22); /* 12 */
129 D_ENCRYPT(l, r, 24); /* 13 */
130 D_ENCRYPT(r, l, 26); /* 14 */
131 D_ENCRYPT(l, r, 28); /* 15 */
132 D_ENCRYPT(r, l, 30); /* 16 */
133#endif
134
135 t = l;
136 l = r;
137 r = t;
138 }
139 l = ROTATE(l, 3) & 0xffffffffL;
140 r = ROTATE(r, 3) & 0xffffffffL;
141
142 PERM_OP(l, r, t, 1, 0x55555555L);
143 PERM_OP(r, l, t, 8, 0x00ff00ffL);
144 PERM_OP(l, r, t, 2, 0x33333333L);
145 PERM_OP(r, l, t, 16, 0x0000ffffL);
146 PERM_OP(l, r, t, 4, 0x0f0f0f0fL);
147
148 out[0] = r;
149 out[1] = l;
150}
151
152#endif /* OPENBSD_DES_ASM */
153
154/* Added more values to handle illegal salt values the way normal
155 * crypt() implementations do. The patch was sent by
156 * Bjorn Gronvall <bg@sics.se>
157 */
158static unsigned const char con_salt[128] = {
159 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9,
160 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1,
161 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9,
162 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1,
163 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
164 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01,
165 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
166 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
167 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
168 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
169 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22,
170 0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24,
171 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
172 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34,
173 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C,
174 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44,
175};
176
177static unsigned const char cov_2char[64] = {
178 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
179 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
180 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
181 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
182 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
183 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
184 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
185 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
186};
187
188char *
189DES_crypt(const char *buf, const char *salt)
190{
191 static char buff[14];
192
193 return (DES_fcrypt(buf, salt, buff));
194}
195LCRYPTO_ALIAS(DES_crypt);
196
197char *
198DES_fcrypt(const char *buf, const char *salt, char *ret)
199{
200 unsigned int i, j, x, y;
201 DES_LONG Eswap0, Eswap1;
202 DES_LONG out[2], ll;
203 DES_cblock key;
204 DES_key_schedule ks;
205 unsigned char bb[9];
206 unsigned char *b = bb;
207 unsigned char c, u;
208
209 /* eay 25/08/92
210 * If you call crypt("pwd","*") as often happens when you
211 * have * as the pwd field in /etc/passwd, the function
212 * returns *\0xxxxxxxxx
213 * The \0 makes the string look like * so the pwd "*" would
214 * crypt to "*". This was found when replacing the crypt in
215 * our shared libraries. People found that the disabled
216 * accounts effectively had no passwd :-(. */
217 x = ret[0] = ((salt[0] == '\0') ? 'A' : salt[0]);
218 Eswap0 = con_salt[x] << 2;
219 x = ret[1] = ((salt[1] == '\0') ? 'A' : salt[1]);
220 Eswap1 = con_salt[x] << 6;
221/* EAY
222r=strlen(buf);
223r=(r+7)/8;
224*/
225 for (i = 0; i < 8; i++) {
226 c = *(buf++);
227 if (!c)
228 break;
229 key[i] = (c << 1);
230 }
231 for (; i < 8; i++)
232 key[i] = 0;
233
234 DES_set_key_unchecked(&key, &ks);
235 fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1);
236
237 ll = out[0];
238 l2c(ll, b);
239 ll = out[1];
240 l2c(ll, b);
241 y = 0;
242 u = 0x80;
243 bb[8] = 0;
244 for (i = 2; i < 13; i++) {
245 c = 0;
246 for (j = 0; j < 6; j++) {
247 c <<= 1;
248 if (bb[y] & u)
249 c |= 1;
250 u >>= 1;
251 if (!u) {
252 y++;
253 u = 0x80;
254 }
255 }
256 ret[i] = cov_2char[c];
257 }
258 ret[13] = '\0';
259 return (ret);
260}
261LCRYPTO_ALIAS(DES_fcrypt);
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