Line data Source code
1 : /*
2 : * FreeSec: libcrypt for NetBSD
3 : *
4 : * contrib/pgcrypto/crypt-des.c
5 : *
6 : * Copyright (c) 1994 David Burren
7 : * All rights reserved.
8 : *
9 : * Adapted for FreeBSD-2.0 by Geoffrey M. Rehmet
10 : * this file should now *only* export crypt(), in order to make
11 : * binaries of libcrypt exportable from the USA
12 : *
13 : * Adapted for FreeBSD-4.0 by Mark R V Murray
14 : * this file should now *only* export px_crypt_des(), in order to make
15 : * a module that can be optionally included in libcrypt.
16 : *
17 : * Redistribution and use in source and binary forms, with or without
18 : * modification, are permitted provided that the following conditions
19 : * are met:
20 : * 1. Redistributions of source code must retain the above copyright
21 : * notice, this list of conditions and the following disclaimer.
22 : * 2. Redistributions in binary form must reproduce the above copyright
23 : * notice, this list of conditions and the following disclaimer in the
24 : * documentation and/or other materials provided with the distribution.
25 : * 3. Neither the name of the author nor the names of other contributors
26 : * may be used to endorse or promote products derived from this software
27 : * without specific prior written permission.
28 : *
29 : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
30 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
33 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 : * SUCH DAMAGE.
40 : *
41 : * $FreeBSD: src/secure/lib/libcrypt/crypt-des.c,v 1.12 1999/09/20 12:39:20 markm Exp $
42 : *
43 : * This is an original implementation of the DES and the crypt(3) interfaces
44 : * by David Burren <davidb@werj.com.au>.
45 : *
46 : * An excellent reference on the underlying algorithm (and related
47 : * algorithms) is:
48 : *
49 : * B. Schneier, Applied Cryptography: protocols, algorithms,
50 : * and source code in C, John Wiley & Sons, 1994.
51 : *
52 : * Note that in that book's description of DES the lookups for the initial,
53 : * pbox, and final permutations are inverted (this has been brought to the
54 : * attention of the author). A list of errata for this book has been
55 : * posted to the sci.crypt newsgroup by the author and is available for FTP.
56 : *
57 : * ARCHITECTURE ASSUMPTIONS:
58 : * It is assumed that the 8-byte arrays passed by reference can be
59 : * addressed as arrays of uint32's (ie. the CPU is not picky about
60 : * alignment).
61 : */
62 :
63 : #include "postgres.h"
64 : #include "miscadmin.h"
65 : #include "port/pg_bswap.h"
66 :
67 : #include "px-crypt.h"
68 :
69 : #define _PASSWORD_EFMT1 '_'
70 :
71 : static const char _crypt_a64[] =
72 : "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
73 :
74 : static uint8 IP[64] = {
75 : 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
76 : 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
77 : 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
78 : 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
79 : };
80 :
81 : static uint8 inv_key_perm[64];
82 : static uint8 u_key_perm[56];
83 : static uint8 key_perm[56] = {
84 : 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
85 : 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
86 : 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
87 : 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
88 : };
89 :
90 : static uint8 key_shifts[16] = {
91 : 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
92 : };
93 :
94 : static uint8 inv_comp_perm[56];
95 : static uint8 comp_perm[48] = {
96 : 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
97 : 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
98 : 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
99 : 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
100 : };
101 :
102 : /*
103 : * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
104 : */
105 :
106 : static uint8 u_sbox[8][64];
107 : static uint8 sbox[8][64] = {
108 : {
109 : 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
110 : 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
111 : 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
112 : 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
113 : },
114 : {
115 : 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
116 : 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
117 : 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
118 : 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
119 : },
120 : {
121 : 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
122 : 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
123 : 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
124 : 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
125 : },
126 : {
127 : 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
128 : 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
129 : 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
130 : 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
131 : },
132 : {
133 : 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
134 : 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
135 : 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
136 : 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
137 : },
138 : {
139 : 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
140 : 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
141 : 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
142 : 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
143 : },
144 : {
145 : 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
146 : 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
147 : 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
148 : 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
149 : },
150 : {
151 : 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
152 : 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
153 : 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
154 : 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
155 : }
156 : };
157 :
158 : static uint8 un_pbox[32];
159 : static uint8 pbox[32] = {
160 : 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
161 : 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
162 : };
163 :
164 : static uint32 _crypt_bits32[32] =
165 : {
166 : 0x80000000, 0x40000000, 0x20000000, 0x10000000,
167 : 0x08000000, 0x04000000, 0x02000000, 0x01000000,
168 : 0x00800000, 0x00400000, 0x00200000, 0x00100000,
169 : 0x00080000, 0x00040000, 0x00020000, 0x00010000,
170 : 0x00008000, 0x00004000, 0x00002000, 0x00001000,
171 : 0x00000800, 0x00000400, 0x00000200, 0x00000100,
172 : 0x00000080, 0x00000040, 0x00000020, 0x00000010,
173 : 0x00000008, 0x00000004, 0x00000002, 0x00000001
174 : };
175 :
176 : static uint8 _crypt_bits8[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
177 :
178 : static uint32 saltbits;
179 : static long old_salt;
180 : static uint32 *bits28,
181 : *bits24;
182 : static uint8 init_perm[64],
183 : final_perm[64];
184 : static uint32 en_keysl[16],
185 : en_keysr[16];
186 : static uint32 de_keysl[16],
187 : de_keysr[16];
188 : static int des_initialised = 0;
189 : static uint8 m_sbox[4][4096];
190 : static uint32 psbox[4][256];
191 : static uint32 ip_maskl[8][256],
192 : ip_maskr[8][256];
193 : static uint32 fp_maskl[8][256],
194 : fp_maskr[8][256];
195 : static uint32 key_perm_maskl[8][128],
196 : key_perm_maskr[8][128];
197 : static uint32 comp_maskl[8][128],
198 : comp_maskr[8][128];
199 : static uint32 old_rawkey0,
200 : old_rawkey1;
201 :
202 : static inline int
203 0 : ascii_to_bin(char ch)
204 : {
205 0 : if (ch > 'z')
206 0 : return 0;
207 0 : if (ch >= 'a')
208 0 : return (ch - 'a' + 38);
209 0 : if (ch > 'Z')
210 0 : return 0;
211 0 : if (ch >= 'A')
212 0 : return (ch - 'A' + 12);
213 0 : if (ch > '9')
214 0 : return 0;
215 0 : if (ch >= '.')
216 0 : return (ch - '.');
217 0 : return 0;
218 0 : }
219 :
220 : static void
221 0 : des_init(void)
222 : {
223 0 : int i,
224 : j,
225 : b,
226 : k,
227 : inbit,
228 : obit;
229 0 : uint32 *p,
230 : *il,
231 : *ir,
232 : *fl,
233 : *fr;
234 :
235 0 : old_rawkey0 = old_rawkey1 = 0L;
236 0 : saltbits = 0L;
237 0 : old_salt = 0L;
238 0 : bits24 = (bits28 = _crypt_bits32 + 4) + 4;
239 :
240 : /*
241 : * Invert the S-boxes, reordering the input bits.
242 : */
243 0 : for (i = 0; i < 8; i++)
244 0 : for (j = 0; j < 64; j++)
245 : {
246 0 : b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
247 0 : u_sbox[i][j] = sbox[i][b];
248 0 : }
249 :
250 : /*
251 : * Convert the inverted S-boxes into 4 arrays of 8 bits. Each will handle
252 : * 12 bits of the S-box input.
253 : */
254 0 : for (b = 0; b < 4; b++)
255 0 : for (i = 0; i < 64; i++)
256 0 : for (j = 0; j < 64; j++)
257 0 : m_sbox[b][(i << 6) | j] =
258 0 : (u_sbox[(b << 1)][i] << 4) |
259 0 : u_sbox[(b << 1) + 1][j];
260 :
261 : /*
262 : * Set up the initial & final permutations into a useful form, and
263 : * initialise the inverted key permutation.
264 : */
265 0 : for (i = 0; i < 64; i++)
266 : {
267 0 : init_perm[final_perm[i] = IP[i] - 1] = i;
268 0 : inv_key_perm[i] = 255;
269 0 : }
270 :
271 : /*
272 : * Invert the key permutation and initialise the inverted key compression
273 : * permutation.
274 : */
275 0 : for (i = 0; i < 56; i++)
276 : {
277 0 : u_key_perm[i] = key_perm[i] - 1;
278 0 : inv_key_perm[key_perm[i] - 1] = i;
279 0 : inv_comp_perm[i] = 255;
280 0 : }
281 :
282 : /*
283 : * Invert the key compression permutation.
284 : */
285 0 : for (i = 0; i < 48; i++)
286 0 : inv_comp_perm[comp_perm[i] - 1] = i;
287 :
288 : /*
289 : * Set up the OR-mask arrays for the initial and final permutations, and
290 : * for the key initial and compression permutations.
291 : */
292 0 : for (k = 0; k < 8; k++)
293 : {
294 0 : for (i = 0; i < 256; i++)
295 : {
296 0 : *(il = &ip_maskl[k][i]) = 0L;
297 0 : *(ir = &ip_maskr[k][i]) = 0L;
298 0 : *(fl = &fp_maskl[k][i]) = 0L;
299 0 : *(fr = &fp_maskr[k][i]) = 0L;
300 0 : for (j = 0; j < 8; j++)
301 : {
302 0 : inbit = 8 * k + j;
303 0 : if (i & _crypt_bits8[j])
304 : {
305 0 : if ((obit = init_perm[inbit]) < 32)
306 0 : *il |= _crypt_bits32[obit];
307 : else
308 0 : *ir |= _crypt_bits32[obit - 32];
309 0 : if ((obit = final_perm[inbit]) < 32)
310 0 : *fl |= _crypt_bits32[obit];
311 : else
312 0 : *fr |= _crypt_bits32[obit - 32];
313 0 : }
314 0 : }
315 0 : }
316 0 : for (i = 0; i < 128; i++)
317 : {
318 0 : *(il = &key_perm_maskl[k][i]) = 0L;
319 0 : *(ir = &key_perm_maskr[k][i]) = 0L;
320 0 : for (j = 0; j < 7; j++)
321 : {
322 0 : inbit = 8 * k + j;
323 0 : if (i & _crypt_bits8[j + 1])
324 : {
325 0 : if ((obit = inv_key_perm[inbit]) == 255)
326 0 : continue;
327 0 : if (obit < 28)
328 0 : *il |= bits28[obit];
329 : else
330 0 : *ir |= bits28[obit - 28];
331 0 : }
332 0 : }
333 0 : *(il = &comp_maskl[k][i]) = 0L;
334 0 : *(ir = &comp_maskr[k][i]) = 0L;
335 0 : for (j = 0; j < 7; j++)
336 : {
337 0 : inbit = 7 * k + j;
338 0 : if (i & _crypt_bits8[j + 1])
339 : {
340 0 : if ((obit = inv_comp_perm[inbit]) == 255)
341 0 : continue;
342 0 : if (obit < 24)
343 0 : *il |= bits24[obit];
344 : else
345 0 : *ir |= bits24[obit - 24];
346 0 : }
347 0 : }
348 0 : }
349 0 : }
350 :
351 : /*
352 : * Invert the P-box permutation, and convert into OR-masks for handling
353 : * the output of the S-box arrays setup above.
354 : */
355 0 : for (i = 0; i < 32; i++)
356 0 : un_pbox[pbox[i] - 1] = i;
357 :
358 0 : for (b = 0; b < 4; b++)
359 0 : for (i = 0; i < 256; i++)
360 : {
361 0 : *(p = &psbox[b][i]) = 0L;
362 0 : for (j = 0; j < 8; j++)
363 : {
364 0 : if (i & _crypt_bits8[j])
365 0 : *p |= _crypt_bits32[un_pbox[8 * b + j]];
366 0 : }
367 0 : }
368 :
369 0 : des_initialised = 1;
370 0 : }
371 :
372 : static void
373 0 : setup_salt(long salt)
374 : {
375 0 : uint32 obit,
376 : saltbit;
377 0 : int i;
378 :
379 0 : if (salt == old_salt)
380 0 : return;
381 0 : old_salt = salt;
382 :
383 0 : saltbits = 0L;
384 0 : saltbit = 1;
385 0 : obit = 0x800000;
386 0 : for (i = 0; i < 24; i++)
387 : {
388 0 : if (salt & saltbit)
389 0 : saltbits |= obit;
390 0 : saltbit <<= 1;
391 0 : obit >>= 1;
392 0 : }
393 0 : }
394 :
395 : static int
396 0 : des_setkey(const char *key)
397 : {
398 0 : uint32 k0,
399 : k1,
400 : rawkey0,
401 : rawkey1;
402 0 : int shifts,
403 : round;
404 :
405 0 : if (!des_initialised)
406 0 : des_init();
407 :
408 0 : rawkey0 = pg_ntoh32(*(const uint32 *) key);
409 0 : rawkey1 = pg_ntoh32(*(const uint32 *) (key + 4));
410 :
411 0 : if ((rawkey0 | rawkey1)
412 0 : && rawkey0 == old_rawkey0
413 0 : && rawkey1 == old_rawkey1)
414 : {
415 : /*
416 : * Already setup for this key. This optimization fails on a zero key
417 : * (which is weak and has bad parity anyway) in order to simplify the
418 : * starting conditions.
419 : */
420 0 : return 0;
421 : }
422 0 : old_rawkey0 = rawkey0;
423 0 : old_rawkey1 = rawkey1;
424 :
425 : /*
426 : * Do key permutation and split into two 28-bit subkeys.
427 : */
428 0 : k0 = key_perm_maskl[0][rawkey0 >> 25]
429 0 : | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
430 0 : | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
431 0 : | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
432 0 : | key_perm_maskl[4][rawkey1 >> 25]
433 0 : | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
434 0 : | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
435 0 : | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
436 0 : k1 = key_perm_maskr[0][rawkey0 >> 25]
437 0 : | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
438 0 : | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
439 0 : | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
440 0 : | key_perm_maskr[4][rawkey1 >> 25]
441 0 : | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
442 0 : | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
443 0 : | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
444 :
445 : /*
446 : * Rotate subkeys and do compression permutation.
447 : */
448 0 : shifts = 0;
449 0 : for (round = 0; round < 16; round++)
450 : {
451 0 : uint32 t0,
452 : t1;
453 :
454 0 : shifts += key_shifts[round];
455 :
456 0 : t0 = (k0 << shifts) | (k0 >> (28 - shifts));
457 0 : t1 = (k1 << shifts) | (k1 >> (28 - shifts));
458 :
459 0 : de_keysl[15 - round] =
460 0 : en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
461 0 : | comp_maskl[1][(t0 >> 14) & 0x7f]
462 0 : | comp_maskl[2][(t0 >> 7) & 0x7f]
463 0 : | comp_maskl[3][t0 & 0x7f]
464 0 : | comp_maskl[4][(t1 >> 21) & 0x7f]
465 0 : | comp_maskl[5][(t1 >> 14) & 0x7f]
466 0 : | comp_maskl[6][(t1 >> 7) & 0x7f]
467 0 : | comp_maskl[7][t1 & 0x7f];
468 :
469 0 : de_keysr[15 - round] =
470 0 : en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
471 0 : | comp_maskr[1][(t0 >> 14) & 0x7f]
472 0 : | comp_maskr[2][(t0 >> 7) & 0x7f]
473 0 : | comp_maskr[3][t0 & 0x7f]
474 0 : | comp_maskr[4][(t1 >> 21) & 0x7f]
475 0 : | comp_maskr[5][(t1 >> 14) & 0x7f]
476 0 : | comp_maskr[6][(t1 >> 7) & 0x7f]
477 0 : | comp_maskr[7][t1 & 0x7f];
478 0 : }
479 0 : return 0;
480 0 : }
481 :
482 : static int
483 0 : do_des(uint32 l_in, uint32 r_in, uint32 *l_out, uint32 *r_out, int count)
484 : {
485 : /*
486 : * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
487 : */
488 0 : uint32 l,
489 : r,
490 : *kl,
491 : *kr,
492 : *kl1,
493 : *kr1;
494 0 : uint32 f,
495 : r48l,
496 : r48r;
497 0 : int round;
498 :
499 0 : if (count == 0)
500 0 : return 1;
501 0 : else if (count > 0)
502 : {
503 : /*
504 : * Encrypting
505 : */
506 0 : kl1 = en_keysl;
507 0 : kr1 = en_keysr;
508 0 : }
509 : else
510 : {
511 : /*
512 : * Decrypting
513 : */
514 0 : count = -count;
515 0 : kl1 = de_keysl;
516 0 : kr1 = de_keysr;
517 : }
518 :
519 : /*
520 : * Do initial permutation (IP).
521 : */
522 0 : l = ip_maskl[0][l_in >> 24]
523 0 : | ip_maskl[1][(l_in >> 16) & 0xff]
524 0 : | ip_maskl[2][(l_in >> 8) & 0xff]
525 0 : | ip_maskl[3][l_in & 0xff]
526 0 : | ip_maskl[4][r_in >> 24]
527 0 : | ip_maskl[5][(r_in >> 16) & 0xff]
528 0 : | ip_maskl[6][(r_in >> 8) & 0xff]
529 0 : | ip_maskl[7][r_in & 0xff];
530 0 : r = ip_maskr[0][l_in >> 24]
531 0 : | ip_maskr[1][(l_in >> 16) & 0xff]
532 0 : | ip_maskr[2][(l_in >> 8) & 0xff]
533 0 : | ip_maskr[3][l_in & 0xff]
534 0 : | ip_maskr[4][r_in >> 24]
535 0 : | ip_maskr[5][(r_in >> 16) & 0xff]
536 0 : | ip_maskr[6][(r_in >> 8) & 0xff]
537 0 : | ip_maskr[7][r_in & 0xff];
538 :
539 0 : while (count--)
540 : {
541 0 : CHECK_FOR_INTERRUPTS();
542 :
543 : /*
544 : * Do each round.
545 : */
546 0 : kl = kl1;
547 0 : kr = kr1;
548 0 : round = 16;
549 0 : while (round--)
550 : {
551 : /*
552 : * Expand R to 48 bits (simulate the E-box).
553 : */
554 0 : r48l = ((r & 0x00000001) << 23)
555 0 : | ((r & 0xf8000000) >> 9)
556 0 : | ((r & 0x1f800000) >> 11)
557 0 : | ((r & 0x01f80000) >> 13)
558 0 : | ((r & 0x001f8000) >> 15);
559 :
560 0 : r48r = ((r & 0x0001f800) << 7)
561 0 : | ((r & 0x00001f80) << 5)
562 0 : | ((r & 0x000001f8) << 3)
563 0 : | ((r & 0x0000001f) << 1)
564 0 : | ((r & 0x80000000) >> 31);
565 :
566 : /*
567 : * Do salting for crypt() and friends, and XOR with the permuted
568 : * key.
569 : */
570 0 : f = (r48l ^ r48r) & saltbits;
571 0 : r48l ^= f ^ *kl++;
572 0 : r48r ^= f ^ *kr++;
573 :
574 : /*
575 : * Do sbox lookups (which shrink it back to 32 bits) and do the
576 : * pbox permutation at the same time.
577 : */
578 0 : f = psbox[0][m_sbox[0][r48l >> 12]]
579 0 : | psbox[1][m_sbox[1][r48l & 0xfff]]
580 0 : | psbox[2][m_sbox[2][r48r >> 12]]
581 0 : | psbox[3][m_sbox[3][r48r & 0xfff]];
582 :
583 : /*
584 : * Now that we've permuted things, complete f().
585 : */
586 0 : f ^= l;
587 0 : l = r;
588 0 : r = f;
589 : }
590 0 : r = l;
591 0 : l = f;
592 : }
593 :
594 : /*
595 : * Do final permutation (inverse of IP).
596 : */
597 0 : *l_out = fp_maskl[0][l >> 24]
598 0 : | fp_maskl[1][(l >> 16) & 0xff]
599 0 : | fp_maskl[2][(l >> 8) & 0xff]
600 0 : | fp_maskl[3][l & 0xff]
601 0 : | fp_maskl[4][r >> 24]
602 0 : | fp_maskl[5][(r >> 16) & 0xff]
603 0 : | fp_maskl[6][(r >> 8) & 0xff]
604 0 : | fp_maskl[7][r & 0xff];
605 0 : *r_out = fp_maskr[0][l >> 24]
606 0 : | fp_maskr[1][(l >> 16) & 0xff]
607 0 : | fp_maskr[2][(l >> 8) & 0xff]
608 0 : | fp_maskr[3][l & 0xff]
609 0 : | fp_maskr[4][r >> 24]
610 0 : | fp_maskr[5][(r >> 16) & 0xff]
611 0 : | fp_maskr[6][(r >> 8) & 0xff]
612 0 : | fp_maskr[7][r & 0xff];
613 0 : return 0;
614 0 : }
615 :
616 : static int
617 0 : des_cipher(const char *in, char *out, long salt, int count)
618 : {
619 0 : uint32 buffer[2];
620 0 : uint32 l_out,
621 : r_out,
622 : rawl,
623 : rawr;
624 0 : int retval;
625 :
626 0 : if (!des_initialised)
627 0 : des_init();
628 :
629 0 : setup_salt(salt);
630 :
631 : /* copy data to avoid assuming input is word-aligned */
632 0 : memcpy(buffer, in, sizeof(buffer));
633 :
634 0 : rawl = pg_ntoh32(buffer[0]);
635 0 : rawr = pg_ntoh32(buffer[1]);
636 :
637 0 : retval = do_des(rawl, rawr, &l_out, &r_out, count);
638 0 : if (retval)
639 0 : return retval;
640 :
641 0 : buffer[0] = pg_hton32(l_out);
642 0 : buffer[1] = pg_hton32(r_out);
643 :
644 : /* copy data to avoid assuming output is word-aligned */
645 0 : memcpy(out, buffer, sizeof(buffer));
646 :
647 0 : return retval;
648 0 : }
649 :
650 : char *
651 0 : px_crypt_des(const char *key, const char *setting)
652 : {
653 0 : int i;
654 0 : uint32 count,
655 : salt,
656 : l,
657 : r0,
658 : r1,
659 : keybuf[2];
660 0 : char *p;
661 0 : uint8 *q;
662 : static char output[21];
663 :
664 0 : if (!des_initialised)
665 0 : des_init();
666 :
667 :
668 : /*
669 : * Copy the key, shifting each character up by one bit and padding with
670 : * zeros.
671 : */
672 0 : q = (uint8 *) keybuf;
673 0 : while (q - (uint8 *) keybuf - 8)
674 : {
675 0 : *q++ = *key << 1;
676 0 : if (*key != '\0')
677 0 : key++;
678 : }
679 0 : if (des_setkey((char *) keybuf))
680 0 : return NULL;
681 :
682 : #ifndef DISABLE_XDES
683 0 : if (*setting == _PASSWORD_EFMT1)
684 : {
685 : /*
686 : * "new"-style: setting must be a 9-character (underscore, then 4
687 : * bytes of count, then 4 bytes of salt) string. See CRYPT(3) under
688 : * the "Extended crypt" heading for further details.
689 : *
690 : * Unlimited characters of the input key are used. This is known as
691 : * the "Extended crypt" DES method.
692 : *
693 : */
694 0 : if (strlen(setting) < 9)
695 0 : ereport(ERROR,
696 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
697 : errmsg("invalid salt")));
698 :
699 0 : for (i = 1, count = 0L; i < 5; i++)
700 0 : count |= ascii_to_bin(setting[i]) << (i - 1) * 6;
701 :
702 0 : for (i = 5, salt = 0L; i < 9; i++)
703 0 : salt |= ascii_to_bin(setting[i]) << (i - 5) * 6;
704 :
705 0 : while (*key)
706 : {
707 : /*
708 : * Encrypt the key with itself.
709 : */
710 0 : if (des_cipher((char *) keybuf, (char *) keybuf, 0L, 1))
711 0 : return NULL;
712 :
713 : /*
714 : * And XOR with the next 8 characters of the key.
715 : */
716 0 : q = (uint8 *) keybuf;
717 0 : while (q - (uint8 *) keybuf - 8 && *key)
718 0 : *q++ ^= *key++ << 1;
719 :
720 0 : if (des_setkey((char *) keybuf))
721 0 : return NULL;
722 : }
723 0 : strlcpy(output, setting, 10);
724 :
725 : /*
726 : * Double check that we weren't given a short setting. If we were, the
727 : * above code will probably have created weird values for count and
728 : * salt, but we don't really care. Just make sure the output string
729 : * doesn't have an extra NUL in it.
730 : */
731 0 : p = output + strlen(output);
732 0 : }
733 : else
734 : #endif /* !DISABLE_XDES */
735 : {
736 : /*
737 : * "old"-style: setting - 2 bytes of salt key - only up to the first 8
738 : * characters of the input key are used.
739 : */
740 0 : count = 25;
741 :
742 0 : if (strlen(setting) < 2)
743 0 : ereport(ERROR,
744 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
745 : errmsg("invalid salt")));
746 :
747 0 : salt = (ascii_to_bin(setting[1]) << 6)
748 0 : | ascii_to_bin(setting[0]);
749 :
750 0 : output[0] = setting[0];
751 :
752 : /*
753 : * If the encrypted password that the salt was extracted from is only
754 : * 1 character long, the salt will be corrupted. We need to ensure
755 : * that the output string doesn't have an extra NUL in it!
756 : */
757 0 : output[1] = setting[1] ? setting[1] : output[0];
758 :
759 0 : p = output + 2;
760 : }
761 0 : setup_salt(salt);
762 :
763 : /*
764 : * Do it.
765 : */
766 0 : if (do_des(0L, 0L, &r0, &r1, count))
767 0 : return NULL;
768 :
769 : /*
770 : * Now encode the result...
771 : */
772 0 : l = (r0 >> 8);
773 0 : *p++ = _crypt_a64[(l >> 18) & 0x3f];
774 0 : *p++ = _crypt_a64[(l >> 12) & 0x3f];
775 0 : *p++ = _crypt_a64[(l >> 6) & 0x3f];
776 0 : *p++ = _crypt_a64[l & 0x3f];
777 :
778 0 : l = (r0 << 16) | ((r1 >> 16) & 0xffff);
779 0 : *p++ = _crypt_a64[(l >> 18) & 0x3f];
780 0 : *p++ = _crypt_a64[(l >> 12) & 0x3f];
781 0 : *p++ = _crypt_a64[(l >> 6) & 0x3f];
782 0 : *p++ = _crypt_a64[l & 0x3f];
783 :
784 0 : l = r1 << 2;
785 0 : *p++ = _crypt_a64[(l >> 12) & 0x3f];
786 0 : *p++ = _crypt_a64[(l >> 6) & 0x3f];
787 0 : *p++ = _crypt_a64[l & 0x3f];
788 0 : *p = 0;
789 :
790 0 : return output;
791 0 : }
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