Annotation of embedaddon/php/ext/standard/crypt_freesec.c, revision 1.1
1.1 ! misho 1: /*
! 2: $Id: crypt_freesec.c 295340 2010-02-22 00:05:02Z pajoye $
! 3: */
! 4: /*
! 5: * This version is derived from the original implementation of FreeSec
! 6: * (release 1.1) by David Burren. I've reviewed the changes made in
! 7: * OpenBSD (as of 2.7) and modified the original code in a similar way
! 8: * where applicable. I've also made it reentrant and made a number of
! 9: * other changes.
! 10: * - Solar Designer <solar at openwall.com>
! 11: */
! 12:
! 13: /*
! 14: * FreeSec: libcrypt for NetBSD
! 15: *
! 16: * Copyright (c) 1994 David Burren
! 17: * All rights reserved.
! 18: *
! 19: * Redistribution and use in source and binary forms, with or without
! 20: * modification, are permitted provided that the following conditions
! 21: * are met:
! 22: * 1. Redistributions of source code must retain the above copyright
! 23: * notice, this list of conditions and the following disclaimer.
! 24: * 2. Redistributions in binary form must reproduce the above copyright
! 25: * notice, this list of conditions and the following disclaimer in the
! 26: * documentation and/or other materials provided with the distribution.
! 27: * 3. Neither the name of the author nor the names of other contributors
! 28: * may be used to endorse or promote products derived from this software
! 29: * without specific prior written permission.
! 30: *
! 31: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 32: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 33: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 34: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 35: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 36: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 37: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 38: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 39: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 40: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 41: * SUCH DAMAGE.
! 42: *
! 43: * $Owl: Owl/packages/glibc/crypt_freesec.c,v 1.4 2005/11/16 13:08:32 solar Exp $
! 44: * $Id: crypt_freesec.c 295340 2010-02-22 00:05:02Z pajoye $
! 45: *
! 46: * This is an original implementation of the DES and the crypt(3) interfaces
! 47: * by David Burren <davidb at werj.com.au>.
! 48: *
! 49: * An excellent reference on the underlying algorithm (and related
! 50: * algorithms) is:
! 51: *
! 52: * B. Schneier, Applied Cryptography: protocols, algorithms,
! 53: * and source code in C, John Wiley & Sons, 1994.
! 54: *
! 55: * Note that in that book's description of DES the lookups for the initial,
! 56: * pbox, and final permutations are inverted (this has been brought to the
! 57: * attention of the author). A list of errata for this book has been
! 58: * posted to the sci.crypt newsgroup by the author and is available for FTP.
! 59: *
! 60: * ARCHITECTURE ASSUMPTIONS:
! 61: * This code used to have some nasty ones, but these have been removed
! 62: * by now. The code requires a 32-bit integer type, though.
! 63: */
! 64:
! 65: #include <sys/types.h>
! 66: #include <string.h>
! 67:
! 68: #ifdef TEST
! 69: #include <stdio.h>
! 70: #endif
! 71:
! 72: #include "crypt_freesec.h"
! 73:
! 74: #define _PASSWORD_EFMT1 '_'
! 75:
! 76: static u_char IP[64] = {
! 77: 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
! 78: 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
! 79: 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
! 80: 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
! 81: };
! 82:
! 83: static u_char 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 u_char key_shifts[16] = {
! 91: 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
! 92: };
! 93:
! 94: static u_char comp_perm[48] = {
! 95: 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
! 96: 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
! 97: 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
! 98: 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
! 99: };
! 100:
! 101: /*
! 102: * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
! 103: */
! 104:
! 105: static u_char sbox[8][64] = {
! 106: {
! 107: 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
! 108: 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
! 109: 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
! 110: 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
! 111: },
! 112: {
! 113: 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
! 114: 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
! 115: 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
! 116: 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
! 117: },
! 118: {
! 119: 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
! 120: 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
! 121: 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
! 122: 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
! 123: },
! 124: {
! 125: 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
! 126: 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
! 127: 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
! 128: 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
! 129: },
! 130: {
! 131: 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
! 132: 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
! 133: 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
! 134: 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
! 135: },
! 136: {
! 137: 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
! 138: 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
! 139: 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
! 140: 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
! 141: },
! 142: {
! 143: 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
! 144: 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
! 145: 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
! 146: 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
! 147: },
! 148: {
! 149: 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
! 150: 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
! 151: 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
! 152: 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
! 153: }
! 154: };
! 155:
! 156: static u_char pbox[32] = {
! 157: 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
! 158: 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
! 159: };
! 160:
! 161: static uint32_t bits32[32] =
! 162: {
! 163: 0x80000000, 0x40000000, 0x20000000, 0x10000000,
! 164: 0x08000000, 0x04000000, 0x02000000, 0x01000000,
! 165: 0x00800000, 0x00400000, 0x00200000, 0x00100000,
! 166: 0x00080000, 0x00040000, 0x00020000, 0x00010000,
! 167: 0x00008000, 0x00004000, 0x00002000, 0x00001000,
! 168: 0x00000800, 0x00000400, 0x00000200, 0x00000100,
! 169: 0x00000080, 0x00000040, 0x00000020, 0x00000010,
! 170: 0x00000008, 0x00000004, 0x00000002, 0x00000001
! 171: };
! 172:
! 173: static u_char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
! 174:
! 175: static unsigned char ascii64[] =
! 176: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
! 177: /* 0000000000111111111122222222223333333333444444444455555555556666 */
! 178: /* 0123456789012345678901234567890123456789012345678901234567890123 */
! 179:
! 180: static u_char m_sbox[4][4096];
! 181: static uint32_t psbox[4][256];
! 182: static uint32_t ip_maskl[8][256], ip_maskr[8][256];
! 183: static uint32_t fp_maskl[8][256], fp_maskr[8][256];
! 184: static uint32_t key_perm_maskl[8][128], key_perm_maskr[8][128];
! 185: static uint32_t comp_maskl[8][128], comp_maskr[8][128];
! 186:
! 187: static inline int
! 188: ascii_to_bin(char ch)
! 189: {
! 190: signed char sch = ch;
! 191: int retval;
! 192:
! 193: retval = sch - '.';
! 194: if (sch >= 'A') {
! 195: retval = sch - ('A' - 12);
! 196: if (sch >= 'a')
! 197: retval = sch - ('a' - 38);
! 198: }
! 199: retval &= 0x3f;
! 200:
! 201: return(retval);
! 202: }
! 203:
! 204: /*
! 205: * When we choose to "support" invalid salts, nevertheless disallow those
! 206: * containing characters that would violate the passwd file format.
! 207: */
! 208: static inline int
! 209: ascii_is_unsafe(char ch)
! 210: {
! 211: return !ch || ch == '\n' || ch == ':';
! 212: }
! 213:
! 214: void
! 215: _crypt_extended_init(void)
! 216: {
! 217: int i, j, b, k, inbit, obit;
! 218: uint32_t *p, *il, *ir, *fl, *fr;
! 219: uint32_t *bits28, *bits24;
! 220: u_char inv_key_perm[64];
! 221: u_char u_key_perm[56];
! 222: u_char inv_comp_perm[56];
! 223: u_char init_perm[64], final_perm[64];
! 224: u_char u_sbox[8][64];
! 225: u_char un_pbox[32];
! 226:
! 227: bits24 = (bits28 = bits32 + 4) + 4;
! 228:
! 229: /*
! 230: * Invert the S-boxes, reordering the input bits.
! 231: */
! 232: for (i = 0; i < 8; i++)
! 233: for (j = 0; j < 64; j++) {
! 234: b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
! 235: u_sbox[i][j] = sbox[i][b];
! 236: }
! 237:
! 238: /*
! 239: * Convert the inverted S-boxes into 4 arrays of 8 bits.
! 240: * Each will handle 12 bits of the S-box input.
! 241: */
! 242: for (b = 0; b < 4; b++)
! 243: for (i = 0; i < 64; i++)
! 244: for (j = 0; j < 64; j++)
! 245: m_sbox[b][(i << 6) | j] =
! 246: (u_sbox[(b << 1)][i] << 4) |
! 247: u_sbox[(b << 1) + 1][j];
! 248:
! 249: /*
! 250: * Set up the initial & final permutations into a useful form, and
! 251: * initialise the inverted key permutation.
! 252: */
! 253: for (i = 0; i < 64; i++) {
! 254: init_perm[final_perm[i] = IP[i] - 1] = i;
! 255: inv_key_perm[i] = 255;
! 256: }
! 257:
! 258: /*
! 259: * Invert the key permutation and initialise the inverted key
! 260: * compression permutation.
! 261: */
! 262: for (i = 0; i < 56; i++) {
! 263: u_key_perm[i] = key_perm[i] - 1;
! 264: inv_key_perm[key_perm[i] - 1] = i;
! 265: inv_comp_perm[i] = 255;
! 266: }
! 267:
! 268: /*
! 269: * Invert the key compression permutation.
! 270: */
! 271: for (i = 0; i < 48; i++) {
! 272: inv_comp_perm[comp_perm[i] - 1] = i;
! 273: }
! 274:
! 275: /*
! 276: * Set up the OR-mask arrays for the initial and final permutations,
! 277: * and for the key initial and compression permutations.
! 278: */
! 279: for (k = 0; k < 8; k++) {
! 280: for (i = 0; i < 256; i++) {
! 281: *(il = &ip_maskl[k][i]) = 0;
! 282: *(ir = &ip_maskr[k][i]) = 0;
! 283: *(fl = &fp_maskl[k][i]) = 0;
! 284: *(fr = &fp_maskr[k][i]) = 0;
! 285: for (j = 0; j < 8; j++) {
! 286: inbit = 8 * k + j;
! 287: if (i & bits8[j]) {
! 288: if ((obit = init_perm[inbit]) < 32)
! 289: *il |= bits32[obit];
! 290: else
! 291: *ir |= bits32[obit-32];
! 292: if ((obit = final_perm[inbit]) < 32)
! 293: *fl |= bits32[obit];
! 294: else
! 295: *fr |= bits32[obit - 32];
! 296: }
! 297: }
! 298: }
! 299: for (i = 0; i < 128; i++) {
! 300: *(il = &key_perm_maskl[k][i]) = 0;
! 301: *(ir = &key_perm_maskr[k][i]) = 0;
! 302: for (j = 0; j < 7; j++) {
! 303: inbit = 8 * k + j;
! 304: if (i & bits8[j + 1]) {
! 305: if ((obit = inv_key_perm[inbit]) == 255)
! 306: continue;
! 307: if (obit < 28)
! 308: *il |= bits28[obit];
! 309: else
! 310: *ir |= bits28[obit - 28];
! 311: }
! 312: }
! 313: *(il = &comp_maskl[k][i]) = 0;
! 314: *(ir = &comp_maskr[k][i]) = 0;
! 315: for (j = 0; j < 7; j++) {
! 316: inbit = 7 * k + j;
! 317: if (i & bits8[j + 1]) {
! 318: if ((obit=inv_comp_perm[inbit]) == 255)
! 319: continue;
! 320: if (obit < 24)
! 321: *il |= bits24[obit];
! 322: else
! 323: *ir |= bits24[obit - 24];
! 324: }
! 325: }
! 326: }
! 327: }
! 328:
! 329: /*
! 330: * Invert the P-box permutation, and convert into OR-masks for
! 331: * handling the output of the S-box arrays setup above.
! 332: */
! 333: for (i = 0; i < 32; i++)
! 334: un_pbox[pbox[i] - 1] = i;
! 335:
! 336: for (b = 0; b < 4; b++)
! 337: for (i = 0; i < 256; i++) {
! 338: *(p = &psbox[b][i]) = 0;
! 339: for (j = 0; j < 8; j++) {
! 340: if (i & bits8[j])
! 341: *p |= bits32[un_pbox[8 * b + j]];
! 342: }
! 343: }
! 344: }
! 345:
! 346: static void
! 347: des_init_local(struct php_crypt_extended_data *data)
! 348: {
! 349: data->old_rawkey0 = data->old_rawkey1 = 0;
! 350: data->saltbits = 0;
! 351: data->old_salt = 0;
! 352:
! 353: data->initialized = 1;
! 354: }
! 355:
! 356: static void
! 357: setup_salt(uint32_t salt, struct php_crypt_extended_data *data)
! 358: {
! 359: uint32_t obit, saltbit, saltbits;
! 360: int i;
! 361:
! 362: if (salt == data->old_salt)
! 363: return;
! 364: data->old_salt = salt;
! 365:
! 366: saltbits = 0;
! 367: saltbit = 1;
! 368: obit = 0x800000;
! 369: for (i = 0; i < 24; i++) {
! 370: if (salt & saltbit)
! 371: saltbits |= obit;
! 372: saltbit <<= 1;
! 373: obit >>= 1;
! 374: }
! 375: data->saltbits = saltbits;
! 376: }
! 377:
! 378: static int
! 379: des_setkey(const char *key, struct php_crypt_extended_data *data)
! 380: {
! 381: uint32_t k0, k1, rawkey0, rawkey1;
! 382: int shifts, round;
! 383:
! 384: rawkey0 =
! 385: (uint32_t)(u_char)key[3] |
! 386: ((uint32_t)(u_char)key[2] << 8) |
! 387: ((uint32_t)(u_char)key[1] << 16) |
! 388: ((uint32_t)(u_char)key[0] << 24);
! 389: rawkey1 =
! 390: (uint32_t)(u_char)key[7] |
! 391: ((uint32_t)(u_char)key[6] << 8) |
! 392: ((uint32_t)(u_char)key[5] << 16) |
! 393: ((uint32_t)(u_char)key[4] << 24);
! 394:
! 395: if ((rawkey0 | rawkey1)
! 396: && rawkey0 == data->old_rawkey0
! 397: && rawkey1 == data->old_rawkey1) {
! 398: /*
! 399: * Already setup for this key.
! 400: * This optimisation fails on a zero key (which is weak and
! 401: * has bad parity anyway) in order to simplify the starting
! 402: * conditions.
! 403: */
! 404: return(0);
! 405: }
! 406: data->old_rawkey0 = rawkey0;
! 407: data->old_rawkey1 = rawkey1;
! 408:
! 409: /*
! 410: * Do key permutation and split into two 28-bit subkeys.
! 411: */
! 412: k0 = key_perm_maskl[0][rawkey0 >> 25]
! 413: | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
! 414: | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
! 415: | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
! 416: | key_perm_maskl[4][rawkey1 >> 25]
! 417: | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
! 418: | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
! 419: | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
! 420: k1 = key_perm_maskr[0][rawkey0 >> 25]
! 421: | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
! 422: | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
! 423: | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
! 424: | key_perm_maskr[4][rawkey1 >> 25]
! 425: | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
! 426: | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
! 427: | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
! 428: /*
! 429: * Rotate subkeys and do compression permutation.
! 430: */
! 431: shifts = 0;
! 432: for (round = 0; round < 16; round++) {
! 433: uint32_t t0, t1;
! 434:
! 435: shifts += key_shifts[round];
! 436:
! 437: t0 = (k0 << shifts) | (k0 >> (28 - shifts));
! 438: t1 = (k1 << shifts) | (k1 >> (28 - shifts));
! 439:
! 440: data->de_keysl[15 - round] =
! 441: data->en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
! 442: | comp_maskl[1][(t0 >> 14) & 0x7f]
! 443: | comp_maskl[2][(t0 >> 7) & 0x7f]
! 444: | comp_maskl[3][t0 & 0x7f]
! 445: | comp_maskl[4][(t1 >> 21) & 0x7f]
! 446: | comp_maskl[5][(t1 >> 14) & 0x7f]
! 447: | comp_maskl[6][(t1 >> 7) & 0x7f]
! 448: | comp_maskl[7][t1 & 0x7f];
! 449:
! 450: data->de_keysr[15 - round] =
! 451: data->en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
! 452: | comp_maskr[1][(t0 >> 14) & 0x7f]
! 453: | comp_maskr[2][(t0 >> 7) & 0x7f]
! 454: | comp_maskr[3][t0 & 0x7f]
! 455: | comp_maskr[4][(t1 >> 21) & 0x7f]
! 456: | comp_maskr[5][(t1 >> 14) & 0x7f]
! 457: | comp_maskr[6][(t1 >> 7) & 0x7f]
! 458: | comp_maskr[7][t1 & 0x7f];
! 459: }
! 460: return(0);
! 461: }
! 462:
! 463: static int
! 464: do_des(uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint32_t *r_out,
! 465: int count, struct php_crypt_extended_data *data)
! 466: {
! 467: /*
! 468: * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
! 469: */
! 470: uint32_t l, r, *kl, *kr, *kl1, *kr1;
! 471: uint32_t f, r48l, r48r, saltbits;
! 472: int round;
! 473:
! 474: if (count == 0) {
! 475: return(1);
! 476: } else if (count > 0) {
! 477: /*
! 478: * Encrypting
! 479: */
! 480: kl1 = data->en_keysl;
! 481: kr1 = data->en_keysr;
! 482: } else {
! 483: /*
! 484: * Decrypting
! 485: */
! 486: count = -count;
! 487: kl1 = data->de_keysl;
! 488: kr1 = data->de_keysr;
! 489: }
! 490:
! 491: /*
! 492: * Do initial permutation (IP).
! 493: */
! 494: l = ip_maskl[0][l_in >> 24]
! 495: | ip_maskl[1][(l_in >> 16) & 0xff]
! 496: | ip_maskl[2][(l_in >> 8) & 0xff]
! 497: | ip_maskl[3][l_in & 0xff]
! 498: | ip_maskl[4][r_in >> 24]
! 499: | ip_maskl[5][(r_in >> 16) & 0xff]
! 500: | ip_maskl[6][(r_in >> 8) & 0xff]
! 501: | ip_maskl[7][r_in & 0xff];
! 502: r = ip_maskr[0][l_in >> 24]
! 503: | ip_maskr[1][(l_in >> 16) & 0xff]
! 504: | ip_maskr[2][(l_in >> 8) & 0xff]
! 505: | ip_maskr[3][l_in & 0xff]
! 506: | ip_maskr[4][r_in >> 24]
! 507: | ip_maskr[5][(r_in >> 16) & 0xff]
! 508: | ip_maskr[6][(r_in >> 8) & 0xff]
! 509: | ip_maskr[7][r_in & 0xff];
! 510:
! 511: saltbits = data->saltbits;
! 512: while (count--) {
! 513: /*
! 514: * Do each round.
! 515: */
! 516: kl = kl1;
! 517: kr = kr1;
! 518: round = 16;
! 519: while (round--) {
! 520: /*
! 521: * Expand R to 48 bits (simulate the E-box).
! 522: */
! 523: r48l = ((r & 0x00000001) << 23)
! 524: | ((r & 0xf8000000) >> 9)
! 525: | ((r & 0x1f800000) >> 11)
! 526: | ((r & 0x01f80000) >> 13)
! 527: | ((r & 0x001f8000) >> 15);
! 528:
! 529: r48r = ((r & 0x0001f800) << 7)
! 530: | ((r & 0x00001f80) << 5)
! 531: | ((r & 0x000001f8) << 3)
! 532: | ((r & 0x0000001f) << 1)
! 533: | ((r & 0x80000000) >> 31);
! 534: /*
! 535: * Do salting for crypt() and friends, and
! 536: * XOR with the permuted key.
! 537: */
! 538: f = (r48l ^ r48r) & saltbits;
! 539: r48l ^= f ^ *kl++;
! 540: r48r ^= f ^ *kr++;
! 541: /*
! 542: * Do sbox lookups (which shrink it back to 32 bits)
! 543: * and do the pbox permutation at the same time.
! 544: */
! 545: f = psbox[0][m_sbox[0][r48l >> 12]]
! 546: | psbox[1][m_sbox[1][r48l & 0xfff]]
! 547: | psbox[2][m_sbox[2][r48r >> 12]]
! 548: | psbox[3][m_sbox[3][r48r & 0xfff]];
! 549: /*
! 550: * Now that we've permuted things, complete f().
! 551: */
! 552: f ^= l;
! 553: l = r;
! 554: r = f;
! 555: }
! 556: r = l;
! 557: l = f;
! 558: }
! 559: /*
! 560: * Do final permutation (inverse of IP).
! 561: */
! 562: *l_out = fp_maskl[0][l >> 24]
! 563: | fp_maskl[1][(l >> 16) & 0xff]
! 564: | fp_maskl[2][(l >> 8) & 0xff]
! 565: | fp_maskl[3][l & 0xff]
! 566: | fp_maskl[4][r >> 24]
! 567: | fp_maskl[5][(r >> 16) & 0xff]
! 568: | fp_maskl[6][(r >> 8) & 0xff]
! 569: | fp_maskl[7][r & 0xff];
! 570: *r_out = fp_maskr[0][l >> 24]
! 571: | fp_maskr[1][(l >> 16) & 0xff]
! 572: | fp_maskr[2][(l >> 8) & 0xff]
! 573: | fp_maskr[3][l & 0xff]
! 574: | fp_maskr[4][r >> 24]
! 575: | fp_maskr[5][(r >> 16) & 0xff]
! 576: | fp_maskr[6][(r >> 8) & 0xff]
! 577: | fp_maskr[7][r & 0xff];
! 578: return(0);
! 579: }
! 580:
! 581: static int
! 582: des_cipher(const char *in, char *out, uint32_t salt, int count,
! 583: struct php_crypt_extended_data *data)
! 584: {
! 585: uint32_t l_out, r_out, rawl, rawr;
! 586: int retval;
! 587:
! 588: setup_salt(salt, data);
! 589:
! 590: rawl =
! 591: (uint32_t)(u_char)in[3] |
! 592: ((uint32_t)(u_char)in[2] << 8) |
! 593: ((uint32_t)(u_char)in[1] << 16) |
! 594: ((uint32_t)(u_char)in[0] << 24);
! 595: rawr =
! 596: (uint32_t)(u_char)in[7] |
! 597: ((uint32_t)(u_char)in[6] << 8) |
! 598: ((uint32_t)(u_char)in[5] << 16) |
! 599: ((uint32_t)(u_char)in[4] << 24);
! 600:
! 601: retval = do_des(rawl, rawr, &l_out, &r_out, count, data);
! 602:
! 603: out[0] = l_out >> 24;
! 604: out[1] = l_out >> 16;
! 605: out[2] = l_out >> 8;
! 606: out[3] = l_out;
! 607: out[4] = r_out >> 24;
! 608: out[5] = r_out >> 16;
! 609: out[6] = r_out >> 8;
! 610: out[7] = r_out;
! 611:
! 612: return(retval);
! 613: }
! 614:
! 615: char *
! 616: _crypt_extended_r(const char *key, const char *setting,
! 617: struct php_crypt_extended_data *data)
! 618: {
! 619: int i;
! 620: uint32_t count, salt, l, r0, r1, keybuf[2];
! 621: u_char *p, *q;
! 622:
! 623: if (!data->initialized)
! 624: des_init_local(data);
! 625:
! 626: /*
! 627: * Copy the key, shifting each character up by one bit
! 628: * and padding with zeros.
! 629: */
! 630: q = (u_char *) keybuf;
! 631: while (q - (u_char *) keybuf < sizeof(keybuf)) {
! 632: if ((*q++ = *key << 1))
! 633: key++;
! 634: }
! 635: if (des_setkey((u_char *) keybuf, data))
! 636: return(NULL);
! 637:
! 638: if (*setting == _PASSWORD_EFMT1) {
! 639: /*
! 640: * "new"-style:
! 641: * setting - underscore, 4 chars of count, 4 chars of salt
! 642: * key - unlimited characters
! 643: */
! 644: for (i = 1, count = 0; i < 5; i++) {
! 645: int value = ascii_to_bin(setting[i]);
! 646: if (ascii64[value] != setting[i])
! 647: return(NULL);
! 648: count |= value << (i - 1) * 6;
! 649: }
! 650: if (!count)
! 651: return(NULL);
! 652:
! 653: for (i = 5, salt = 0; i < 9; i++) {
! 654: int value = ascii_to_bin(setting[i]);
! 655: if (ascii64[value] != setting[i])
! 656: return(NULL);
! 657: salt |= value << (i - 5) * 6;
! 658: }
! 659:
! 660: while (*key) {
! 661: /*
! 662: * Encrypt the key with itself.
! 663: */
! 664: if (des_cipher((u_char *) keybuf, (u_char *) keybuf,
! 665: 0, 1, data))
! 666: return(NULL);
! 667: /*
! 668: * And XOR with the next 8 characters of the key.
! 669: */
! 670: q = (u_char *) keybuf;
! 671: while (q - (u_char *) keybuf < sizeof(keybuf) && *key)
! 672: *q++ ^= *key++ << 1;
! 673:
! 674: if (des_setkey((u_char *) keybuf, data))
! 675: return(NULL);
! 676: }
! 677: memcpy(data->output, setting, 9);
! 678: data->output[9] = '\0';
! 679: p = (u_char *) data->output + 9;
! 680: } else {
! 681: /*
! 682: * "old"-style:
! 683: * setting - 2 chars of salt
! 684: * key - up to 8 characters
! 685: */
! 686: count = 25;
! 687:
! 688: if (ascii_is_unsafe(setting[0]) || ascii_is_unsafe(setting[1]))
! 689: return(NULL);
! 690:
! 691: salt = (ascii_to_bin(setting[1]) << 6)
! 692: | ascii_to_bin(setting[0]);
! 693:
! 694: data->output[0] = setting[0];
! 695: data->output[1] = setting[1];
! 696: p = (u_char *) data->output + 2;
! 697: }
! 698: setup_salt(salt, data);
! 699: /*
! 700: * Do it.
! 701: */
! 702: if (do_des(0, 0, &r0, &r1, count, data))
! 703: return(NULL);
! 704: /*
! 705: * Now encode the result...
! 706: */
! 707: l = (r0 >> 8);
! 708: *p++ = ascii64[(l >> 18) & 0x3f];
! 709: *p++ = ascii64[(l >> 12) & 0x3f];
! 710: *p++ = ascii64[(l >> 6) & 0x3f];
! 711: *p++ = ascii64[l & 0x3f];
! 712:
! 713: l = (r0 << 16) | ((r1 >> 16) & 0xffff);
! 714: *p++ = ascii64[(l >> 18) & 0x3f];
! 715: *p++ = ascii64[(l >> 12) & 0x3f];
! 716: *p++ = ascii64[(l >> 6) & 0x3f];
! 717: *p++ = ascii64[l & 0x3f];
! 718:
! 719: l = r1 << 2;
! 720: *p++ = ascii64[(l >> 12) & 0x3f];
! 721: *p++ = ascii64[(l >> 6) & 0x3f];
! 722: *p++ = ascii64[l & 0x3f];
! 723: *p = 0;
! 724:
! 725: return(data->output);
! 726: }
! 727:
! 728: #ifdef TEST
! 729: static char *
! 730: _crypt_extended(const char *key, const char *setting)
! 731: {
! 732: static int initialized = 0;
! 733: static struct php_crypt_extended_data data;
! 734:
! 735: if (!initialized) {
! 736: _crypt_extended_init();
! 737: initialized = 1;
! 738: data.initialized = 0;
! 739: }
! 740: return _crypt_extended_r(key, setting, &data);
! 741: }
! 742:
! 743: #define crypt _crypt_extended
! 744:
! 745: static struct {
! 746: char *hash;
! 747: char *pw;
! 748: } tests[] = {
! 749: /* "new"-style */
! 750: {"_J9..CCCCXBrJUJV154M", "U*U*U*U*"},
! 751: {"_J9..CCCCXUhOBTXzaiE", "U*U***U"},
! 752: {"_J9..CCCC4gQ.mB/PffM", "U*U***U*"},
! 753: {"_J9..XXXXvlzQGqpPPdk", "*U*U*U*U"},
! 754: {"_J9..XXXXsqM/YSSP..Y", "*U*U*U*U*"},
! 755: {"_J9..XXXXVL7qJCnku0I", "*U*U*U*U*U*U*U*U"},
! 756: {"_J9..XXXXAj8cFbP5scI", "*U*U*U*U*U*U*U*U*"},
! 757: {"_J9..SDizh.vll5VED9g", "ab1234567"},
! 758: {"_J9..SDizRjWQ/zePPHc", "cr1234567"},
! 759: {"_J9..SDizxmRI1GjnQuE", "zxyDPWgydbQjgq"},
! 760: {"_K9..SaltNrQgIYUAeoY", "726 even"},
! 761: {"_J9..SDSD5YGyRCr4W4c", ""},
! 762: /* "old"-style, valid salts */
! 763: {"CCNf8Sbh3HDfQ", "U*U*U*U*"},
! 764: {"CCX.K.MFy4Ois", "U*U***U"},
! 765: {"CC4rMpbg9AMZ.", "U*U***U*"},
! 766: {"XXxzOu6maQKqQ", "*U*U*U*U"},
! 767: {"SDbsugeBiC58A", ""},
! 768: {"./xZjzHv5vzVE", "password"},
! 769: {"0A2hXM1rXbYgo", "password"},
! 770: {"A9RXdR23Y.cY6", "password"},
! 771: {"ZziFATVXHo2.6", "password"},
! 772: {"zZDDIZ0NOlPzw", "password"},
! 773: /* "old"-style, "reasonable" invalid salts, UFC-crypt behavior expected */
! 774: {"\001\002wyd0KZo65Jo", "password"},
! 775: {"a_C10Dk/ExaG.", "password"},
! 776: {"~\377.5OTsRVjwLo", "password"},
! 777: /* The below are erroneous inputs, so NULL return is expected/required */
! 778: {"", ""}, /* no salt */
! 779: {" ", ""}, /* setting string is too short */
! 780: {"a:", ""}, /* unsafe character */
! 781: {"\na", ""}, /* unsafe character */
! 782: {"_/......", ""}, /* setting string is too short for its type */
! 783: {"_........", ""}, /* zero iteration count */
! 784: {"_/!......", ""}, /* invalid character in count */
! 785: {"_/......!", ""}, /* invalid character in salt */
! 786: {NULL}
! 787: };
! 788:
! 789: int main(void)
! 790: {
! 791: int i;
! 792:
! 793: for (i = 0; tests[i].hash; i++) {
! 794: char *hash = crypt(tests[i].pw, tests[i].hash);
! 795: if (!hash && strlen(tests[i].hash) < 13)
! 796: continue; /* expected failure */
! 797: if (!strcmp(hash, tests[i].hash))
! 798: continue; /* expected success */
! 799: puts("FAILED");
! 800: return 1;
! 801: }
! 802:
! 803: puts("PASSED");
! 804:
! 805: return 0;
! 806: }
! 807: #endif
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