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LCOV - code coverage report
Current view: top level - ext/standard - crypt_freesec.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 292 304 96.1 %
Date: 2015-09-02 Functions: 9 9 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   $Id$
       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             :  *      $Id$
      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          41 : ascii_to_bin(char ch)
     189             : {
     190          41 :         signed char sch = ch;
     191             :         int retval;
     192             : 
     193          41 :         retval = sch - '.';
     194          41 :         if (sch >= 'A') {
     195           9 :                 retval = sch - ('A' - 12);
     196           9 :                 if (sch >= 'a')
     197           8 :                         retval = sch - ('a' - 38);
     198             :         }
     199          41 :         retval &= 0x3f;
     200             : 
     201          41 :         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          17 : ascii_is_unsafe(char ch)
     210             : {
     211          17 :         return !ch || ch == '\n' || ch == ':';
     212             : }
     213             : 
     214             : void
     215           5 : _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 inv_comp_perm[56];
     222             :         u_char init_perm[64], final_perm[64];
     223             :         u_char u_sbox[8][64];
     224             :         u_char un_pbox[32];
     225             : 
     226           5 :         bits24 = (bits28 = bits32 + 4) + 4;
     227             : 
     228             :         /*
     229             :          * Invert the S-boxes, reordering the input bits.
     230             :          */
     231          45 :         for (i = 0; i < 8; i++)
     232        2600 :                 for (j = 0; j < 64; j++) {
     233        2560 :                         b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
     234        2560 :                         u_sbox[i][j] = sbox[i][b];
     235             :                 }
     236             : 
     237             :         /*
     238             :          * Convert the inverted S-boxes into 4 arrays of 8 bits.
     239             :          * Each will handle 12 bits of the S-box input.
     240             :          */
     241          25 :         for (b = 0; b < 4; b++)
     242        1300 :                 for (i = 0; i < 64; i++)
     243       83200 :                         for (j = 0; j < 64; j++)
     244      245760 :                                 m_sbox[b][(i << 6) | j] =
     245       81920 :                                         (u_sbox[(b << 1)][i] << 4) |
     246       81920 :                                         u_sbox[(b << 1) + 1][j];
     247             : 
     248             :         /*
     249             :          * Set up the initial & final permutations into a useful form, and
     250             :          * initialise the inverted key permutation.
     251             :          */
     252         325 :         for (i = 0; i < 64; i++) {
     253         320 :                 init_perm[final_perm[i] = IP[i] - 1] = i;
     254         320 :                 inv_key_perm[i] = 255;
     255             :         }
     256             : 
     257             :         /*
     258             :          * Invert the key permutation and initialise the inverted key
     259             :          * compression permutation.
     260             :          */
     261         285 :         for (i = 0; i < 56; i++) {
     262         280 :                 inv_key_perm[key_perm[i] - 1] = i;
     263         280 :                 inv_comp_perm[i] = 255;
     264             :         }
     265             : 
     266             :         /*
     267             :          * Invert the key compression permutation.
     268             :          */
     269         245 :         for (i = 0; i < 48; i++) {
     270         240 :                 inv_comp_perm[comp_perm[i] - 1] = i;
     271             :         }
     272             : 
     273             :         /*
     274             :          * Set up the OR-mask arrays for the initial and final permutations,
     275             :          * and for the key initial and compression permutations.
     276             :          */
     277          45 :         for (k = 0; k < 8; k++) {
     278       10280 :                 for (i = 0; i < 256; i++) {
     279       10240 :                         *(il = &ip_maskl[k][i]) = 0;
     280       10240 :                         *(ir = &ip_maskr[k][i]) = 0;
     281       10240 :                         *(fl = &fp_maskl[k][i]) = 0;
     282       10240 :                         *(fr = &fp_maskr[k][i]) = 0;
     283       92160 :                         for (j = 0; j < 8; j++) {
     284       81920 :                                 inbit = 8 * k + j;
     285       81920 :                                 if (i & bits8[j]) {
     286       40960 :                                         if ((obit = init_perm[inbit]) < 32)
     287       20480 :                                                 *il |= bits32[obit];
     288             :                                         else
     289       20480 :                                                 *ir |= bits32[obit-32];
     290       40960 :                                         if ((obit = final_perm[inbit]) < 32)
     291       20480 :                                                 *fl |= bits32[obit];
     292             :                                         else
     293       20480 :                                                 *fr |= bits32[obit - 32];
     294             :                                 }
     295             :                         }
     296             :                 }
     297        5160 :                 for (i = 0; i < 128; i++) {
     298        5120 :                         *(il = &key_perm_maskl[k][i]) = 0;
     299        5120 :                         *(ir = &key_perm_maskr[k][i]) = 0;
     300       40960 :                         for (j = 0; j < 7; j++) {
     301       35840 :                                 inbit = 8 * k + j;
     302       35840 :                                 if (i & bits8[j + 1]) {
     303       17920 :                                         if ((obit = inv_key_perm[inbit]) == 255)
     304           0 :                                                 continue;
     305       17920 :                                         if (obit < 28)
     306        8960 :                                                 *il |= bits28[obit];
     307             :                                         else
     308        8960 :                                                 *ir |= bits28[obit - 28];
     309             :                                 }
     310             :                         }
     311        5120 :                         *(il = &comp_maskl[k][i]) = 0;
     312        5120 :                         *(ir = &comp_maskr[k][i]) = 0;
     313       40960 :                         for (j = 0; j < 7; j++) {
     314       35840 :                                 inbit = 7 * k + j;
     315       35840 :                                 if (i & bits8[j + 1]) {
     316       17920 :                                         if ((obit=inv_comp_perm[inbit]) == 255)
     317        2560 :                                                 continue;
     318       15360 :                                         if (obit < 24)
     319        7680 :                                                 *il |= bits24[obit];
     320             :                                         else
     321        7680 :                                                 *ir |= bits24[obit - 24];
     322             :                                 }
     323             :                         }
     324             :                 }
     325             :         }
     326             : 
     327             :         /*
     328             :          * Invert the P-box permutation, and convert into OR-masks for
     329             :          * handling the output of the S-box arrays setup above.
     330             :          */
     331         165 :         for (i = 0; i < 32; i++)
     332         160 :                 un_pbox[pbox[i] - 1] = i;
     333             : 
     334          25 :         for (b = 0; b < 4; b++)
     335        5140 :                 for (i = 0; i < 256; i++) {
     336        5120 :                         *(p = &psbox[b][i]) = 0;
     337       46080 :                         for (j = 0; j < 8; j++) {
     338       40960 :                                 if (i & bits8[j])
     339       20480 :                                         *p |= bits32[un_pbox[8 * b + j]];
     340             :                         }
     341             :                 }
     342           5 : }
     343             : 
     344             : static void
     345          13 : des_init_local(struct php_crypt_extended_data *data)
     346             : {
     347          13 :         data->old_rawkey0 = data->old_rawkey1 = 0;
     348          13 :         data->saltbits = 0;
     349          13 :         data->old_salt = 0;
     350             : 
     351          13 :         data->initialized = 1;
     352          13 : }
     353             : 
     354             : static void
     355          14 : setup_salt(uint32_t salt, struct php_crypt_extended_data *data)
     356             : {
     357             :         uint32_t        obit, saltbit, saltbits;
     358             :         int     i;
     359             : 
     360          14 :         if (salt == data->old_salt)
     361           3 :                 return;
     362          11 :         data->old_salt = salt;
     363             : 
     364          11 :         saltbits = 0;
     365          11 :         saltbit = 1;
     366          11 :         obit = 0x800000;
     367         275 :         for (i = 0; i < 24; i++) {
     368         264 :                 if (salt & saltbit)
     369          82 :                         saltbits |= obit;
     370         264 :                 saltbit <<= 1;
     371         264 :                 obit >>= 1;
     372             :         }
     373          11 :         data->saltbits = saltbits;
     374             : }
     375             : 
     376             : static int
     377          16 : des_setkey(const char *key, struct php_crypt_extended_data *data)
     378             : {
     379             :         uint32_t        k0, k1, rawkey0, rawkey1;
     380             :         int     shifts, round;
     381             : 
     382          16 :         rawkey0 =
     383          16 :                 (uint32_t)(u_char)key[3] |
     384          16 :                 ((uint32_t)(u_char)key[2] << 8) |
     385          16 :                 ((uint32_t)(u_char)key[1] << 16) |
     386          16 :                 ((uint32_t)(u_char)key[0] << 24);
     387          16 :         rawkey1 =
     388          16 :                 (uint32_t)(u_char)key[7] |
     389          16 :                 ((uint32_t)(u_char)key[6] << 8) |
     390          16 :                 ((uint32_t)(u_char)key[5] << 16) |
     391          16 :                 ((uint32_t)(u_char)key[4] << 24);
     392             : 
     393          32 :         if ((rawkey0 | rawkey1)
     394             :             && rawkey0 == data->old_rawkey0
     395          16 :             && rawkey1 == data->old_rawkey1) {
     396             :                 /*
     397             :                  * Already setup for this key.
     398             :                  * This optimisation fails on a zero key (which is weak and
     399             :                  * has bad parity anyway) in order to simplify the starting
     400             :                  * conditions.
     401             :                  */
     402           0 :                 return(0);
     403             :         }
     404          16 :         data->old_rawkey0 = rawkey0;
     405          16 :         data->old_rawkey1 = rawkey1;
     406             : 
     407             :         /*
     408             :          *      Do key permutation and split into two 28-bit subkeys.
     409             :          */
     410          32 :         k0 = key_perm_maskl[0][rawkey0 >> 25]
     411          16 :            | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
     412          16 :            | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
     413          16 :            | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
     414          16 :            | key_perm_maskl[4][rawkey1 >> 25]
     415          16 :            | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
     416          16 :            | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
     417          16 :            | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
     418          32 :         k1 = key_perm_maskr[0][rawkey0 >> 25]
     419          16 :            | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
     420          16 :            | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
     421          16 :            | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
     422          16 :            | key_perm_maskr[4][rawkey1 >> 25]
     423          16 :            | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
     424          16 :            | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
     425          16 :            | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
     426             :         /*
     427             :          *      Rotate subkeys and do compression permutation.
     428             :          */
     429          16 :         shifts = 0;
     430         272 :         for (round = 0; round < 16; round++) {
     431             :                 uint32_t        t0, t1;
     432             : 
     433         256 :                 shifts += key_shifts[round];
     434             : 
     435         256 :                 t0 = (k0 << shifts) | (k0 >> (28 - shifts));
     436         256 :                 t1 = (k1 << shifts) | (k1 >> (28 - shifts));
     437             : 
     438         768 :                 data->de_keysl[15 - round] =
     439         768 :                 data->en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
     440         256 :                                 | comp_maskl[1][(t0 >> 14) & 0x7f]
     441         256 :                                 | comp_maskl[2][(t0 >> 7) & 0x7f]
     442         256 :                                 | comp_maskl[3][t0 & 0x7f]
     443         256 :                                 | comp_maskl[4][(t1 >> 21) & 0x7f]
     444         256 :                                 | comp_maskl[5][(t1 >> 14) & 0x7f]
     445         256 :                                 | comp_maskl[6][(t1 >> 7) & 0x7f]
     446         256 :                                 | comp_maskl[7][t1 & 0x7f];
     447             : 
     448         768 :                 data->de_keysr[15 - round] =
     449         768 :                 data->en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
     450         256 :                                 | comp_maskr[1][(t0 >> 14) & 0x7f]
     451         256 :                                 | comp_maskr[2][(t0 >> 7) & 0x7f]
     452         256 :                                 | comp_maskr[3][t0 & 0x7f]
     453         256 :                                 | comp_maskr[4][(t1 >> 21) & 0x7f]
     454         256 :                                 | comp_maskr[5][(t1 >> 14) & 0x7f]
     455         256 :                                 | comp_maskr[6][(t1 >> 7) & 0x7f]
     456         256 :                                 | comp_maskr[7][t1 & 0x7f];
     457             :         }
     458          16 :         return(0);
     459             : }
     460             : 
     461             : static int
     462          14 : do_des(uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint32_t *r_out,
     463             :         int count, struct php_crypt_extended_data *data)
     464             : {
     465             :         /*
     466             :          *      l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
     467             :          */
     468             :         uint32_t        l, r, *kl, *kr, *kl1, *kr1;
     469             :         uint32_t        f, r48l, r48r, saltbits;
     470             :         int     round;
     471             : 
     472          14 :         if (count == 0) {
     473           0 :                 return(1);
     474          14 :         } else if (count > 0) {
     475             :                 /*
     476             :                  * Encrypting
     477             :                  */
     478          14 :                 kl1 = data->en_keysl;
     479          14 :                 kr1 = data->en_keysr;
     480             :         } else {
     481             :                 /*
     482             :                  * Decrypting
     483             :                  */
     484           0 :                 count = -count;
     485           0 :                 kl1 = data->de_keysl;
     486           0 :                 kr1 = data->de_keysr;
     487             :         }
     488             : 
     489             :         /*
     490             :          *      Do initial permutation (IP).
     491             :          */
     492          28 :         l = ip_maskl[0][l_in >> 24]
     493          14 :           | ip_maskl[1][(l_in >> 16) & 0xff]
     494          14 :           | ip_maskl[2][(l_in >> 8) & 0xff]
     495          14 :           | ip_maskl[3][l_in & 0xff]
     496          14 :           | ip_maskl[4][r_in >> 24]
     497          14 :           | ip_maskl[5][(r_in >> 16) & 0xff]
     498          14 :           | ip_maskl[6][(r_in >> 8) & 0xff]
     499          14 :           | ip_maskl[7][r_in & 0xff];
     500          28 :         r = ip_maskr[0][l_in >> 24]
     501          14 :           | ip_maskr[1][(l_in >> 16) & 0xff]
     502          14 :           | ip_maskr[2][(l_in >> 8) & 0xff]
     503          14 :           | ip_maskr[3][l_in & 0xff]
     504          14 :           | ip_maskr[4][r_in >> 24]
     505          14 :           | ip_maskr[5][(r_in >> 16) & 0xff]
     506          14 :           | ip_maskr[6][(r_in >> 8) & 0xff]
     507          14 :           | ip_maskr[7][r_in & 0xff];
     508             : 
     509          14 :         saltbits = data->saltbits;
     510     2655552 :         while (count--) {
     511             :                 /*
     512             :                  * Do each round.
     513             :                  */
     514     2655524 :                 kl = kl1;
     515     2655524 :                 kr = kr1;
     516     2655524 :                 round = 16;
     517    47799432 :                 while (round--) {
     518             :                         /*
     519             :                          * Expand R to 48 bits (simulate the E-box).
     520             :                          */
     521    84976768 :                         r48l    = ((r & 0x00000001) << 23)
     522    42488384 :                                 | ((r & 0xf8000000) >> 9)
     523    42488384 :                                 | ((r & 0x1f800000) >> 11)
     524    42488384 :                                 | ((r & 0x01f80000) >> 13)
     525    42488384 :                                 | ((r & 0x001f8000) >> 15);
     526             : 
     527    84976768 :                         r48r    = ((r & 0x0001f800) << 7)
     528    42488384 :                                 | ((r & 0x00001f80) << 5)
     529    42488384 :                                 | ((r & 0x000001f8) << 3)
     530    42488384 :                                 | ((r & 0x0000001f) << 1)
     531    42488384 :                                 | ((r & 0x80000000) >> 31);
     532             :                         /*
     533             :                          * Do salting for crypt() and friends, and
     534             :                          * XOR with the permuted key.
     535             :                          */
     536    42488384 :                         f = (r48l ^ r48r) & saltbits;
     537    42488384 :                         r48l ^= f ^ *kl++;
     538    42488384 :                         r48r ^= f ^ *kr++;
     539             :                         /*
     540             :                          * Do sbox lookups (which shrink it back to 32 bits)
     541             :                          * and do the pbox permutation at the same time.
     542             :                          */
     543    84976768 :                         f = psbox[0][m_sbox[0][r48l >> 12]]
     544    42488384 :                           | psbox[1][m_sbox[1][r48l & 0xfff]]
     545    42488384 :                           | psbox[2][m_sbox[2][r48r >> 12]]
     546    42488384 :                           | psbox[3][m_sbox[3][r48r & 0xfff]];
     547             :                         /*
     548             :                          * Now that we've permuted things, complete f().
     549             :                          */
     550    42488384 :                         f ^= l;
     551    42488384 :                         l = r;
     552    42488384 :                         r = f;
     553             :                 }
     554     2655524 :                 r = l;
     555     2655524 :                 l = f;
     556             :         }
     557             :         /*
     558             :          * Do final permutation (inverse of IP).
     559             :          */
     560          28 :         *l_out  = fp_maskl[0][l >> 24]
     561          14 :                 | fp_maskl[1][(l >> 16) & 0xff]
     562          14 :                 | fp_maskl[2][(l >> 8) & 0xff]
     563          14 :                 | fp_maskl[3][l & 0xff]
     564          14 :                 | fp_maskl[4][r >> 24]
     565          14 :                 | fp_maskl[5][(r >> 16) & 0xff]
     566          14 :                 | fp_maskl[6][(r >> 8) & 0xff]
     567          14 :                 | fp_maskl[7][r & 0xff];
     568          28 :         *r_out  = fp_maskr[0][l >> 24]
     569          14 :                 | fp_maskr[1][(l >> 16) & 0xff]
     570          14 :                 | fp_maskr[2][(l >> 8) & 0xff]
     571          14 :                 | fp_maskr[3][l & 0xff]
     572          14 :                 | fp_maskr[4][r >> 24]
     573          14 :                 | fp_maskr[5][(r >> 16) & 0xff]
     574          14 :                 | fp_maskr[6][(r >> 8) & 0xff]
     575          14 :                 | fp_maskr[7][r & 0xff];
     576          14 :         return(0);
     577             : }
     578             : 
     579             : static int
     580           3 : des_cipher(const char *in, char *out, uint32_t salt, int count,
     581             :         struct php_crypt_extended_data *data)
     582             : {
     583             :         uint32_t        l_out, r_out, rawl, rawr;
     584             :         int     retval;
     585             : 
     586           3 :         setup_salt(salt, data);
     587             : 
     588           3 :         rawl =
     589           3 :                 (uint32_t)(u_char)in[3] |
     590           3 :                 ((uint32_t)(u_char)in[2] << 8) |
     591           3 :                 ((uint32_t)(u_char)in[1] << 16) |
     592           3 :                 ((uint32_t)(u_char)in[0] << 24);
     593           3 :         rawr =
     594           3 :                 (uint32_t)(u_char)in[7] |
     595           3 :                 ((uint32_t)(u_char)in[6] << 8) |
     596           3 :                 ((uint32_t)(u_char)in[5] << 16) |
     597           3 :                 ((uint32_t)(u_char)in[4] << 24);
     598             : 
     599           3 :         retval = do_des(rawl, rawr, &l_out, &r_out, count, data);
     600             : 
     601           3 :         out[0] = l_out >> 24;
     602           3 :         out[1] = l_out >> 16;
     603           3 :         out[2] = l_out >> 8;
     604           3 :         out[3] = l_out;
     605           3 :         out[4] = r_out >> 24;
     606           3 :         out[5] = r_out >> 16;
     607           3 :         out[6] = r_out >> 8;
     608           3 :         out[7] = r_out;
     609             : 
     610           3 :         return(retval);
     611             : }
     612             : 
     613             : char *
     614          13 : _crypt_extended_r(const char *key, const char *setting,
     615             :         struct php_crypt_extended_data *data)
     616             : {
     617             :         int             i;
     618             :         uint32_t        count, salt, l, r0, r1, keybuf[2];
     619             :         u_char          *p, *q;
     620             : 
     621          13 :         if (!data->initialized)
     622          13 :                 des_init_local(data);
     623             : 
     624             :         /*
     625             :          * Copy the key, shifting each character up by one bit
     626             :          * and padding with zeros.
     627             :          */
     628          13 :         q = (u_char *) keybuf;
     629         130 :         while (q - (u_char *) keybuf < sizeof(keybuf)) {
     630         104 :                 *q++ = *key << 1;
     631         104 :                 if (*key)
     632          74 :                         key++;
     633             :         }
     634          13 :         if (des_setkey((char *) keybuf, data))
     635           0 :                 return(NULL);
     636             : 
     637          13 :         if (*setting == _PASSWORD_EFMT1) {
     638             :                 /*
     639             :                  * "new"-style:
     640             :                  *      setting - underscore, 4 chars of count, 4 chars of salt
     641             :                  *      key - unlimited characters
     642             :                  */
     643          16 :                 for (i = 1, count = 0; i < 5; i++) {
     644          13 :                         int value = ascii_to_bin(setting[i]);
     645          13 :                         if (ascii64[value] != setting[i])
     646           1 :                                 return(NULL);
     647          12 :                         count |= value << (i - 1) * 6;
     648             :                 }
     649           3 :                 if (!count)
     650           0 :                         return(NULL);
     651             : 
     652          15 :                 for (i = 5, salt = 0; i < 9; i++) {
     653          12 :                         int value = ascii_to_bin(setting[i]);
     654          12 :                         if (ascii64[value] != setting[i])
     655           0 :                                 return(NULL);
     656          12 :                         salt |= value << (i - 5) * 6;
     657             :                 }
     658             : 
     659           9 :                 while (*key) {
     660             :                         /*
     661             :                          * Encrypt the key with itself.
     662             :                          */
     663           3 :                         if (des_cipher((char *) keybuf, (char *) keybuf,
     664             :                             0, 1, data))
     665           0 :                                 return(NULL);
     666             :                         /*
     667             :                          * And XOR with the next 8 characters of the key.
     668             :                          */
     669           3 :                         q = (u_char *) keybuf;
     670          15 :                         while (q - (u_char *) keybuf < sizeof(keybuf) && *key)
     671           9 :                                 *q++ ^= *key++ << 1;
     672             : 
     673           3 :                         if (des_setkey((char *) keybuf, data))
     674           0 :                                 return(NULL);
     675             :                 }
     676           3 :                 memcpy(data->output, setting, 9);
     677           3 :                 data->output[9] = '\0';
     678           3 :                 p = (u_char *) data->output + 9;
     679             :         } else {
     680             :                 /*
     681             :                  * "old"-style:
     682             :                  *      setting - 2 chars of salt
     683             :                  *      key - up to 8 characters
     684             :                  */
     685           9 :                 count = 25;
     686             : 
     687           9 :                 if (ascii_is_unsafe(setting[0]) || ascii_is_unsafe(setting[1]))
     688           1 :                         return(NULL);
     689             : 
     690          16 :                 salt = (ascii_to_bin(setting[1]) << 6)
     691           8 :                      |  ascii_to_bin(setting[0]);
     692             : 
     693           8 :                 data->output[0] = setting[0];
     694           8 :                 data->output[1] = setting[1];
     695           8 :                 p = (u_char *) data->output + 2;
     696             :         }
     697          11 :         setup_salt(salt, data);
     698             :         /*
     699             :          * Do it.
     700             :          */
     701          11 :         if (do_des(0, 0, &r0, &r1, count, data))
     702           0 :                 return(NULL);
     703             :         /*
     704             :          * Now encode the result...
     705             :          */
     706          11 :         l = (r0 >> 8);
     707          11 :         *p++ = ascii64[(l >> 18) & 0x3f];
     708          11 :         *p++ = ascii64[(l >> 12) & 0x3f];
     709          11 :         *p++ = ascii64[(l >> 6) & 0x3f];
     710          11 :         *p++ = ascii64[l & 0x3f];
     711             : 
     712          11 :         l = (r0 << 16) | ((r1 >> 16) & 0xffff);
     713          11 :         *p++ = ascii64[(l >> 18) & 0x3f];
     714          11 :         *p++ = ascii64[(l >> 12) & 0x3f];
     715          11 :         *p++ = ascii64[(l >> 6) & 0x3f];
     716          11 :         *p++ = ascii64[l & 0x3f];
     717             : 
     718          11 :         l = r1 << 2;
     719          11 :         *p++ = ascii64[(l >> 12) & 0x3f];
     720          11 :         *p++ = ascii64[(l >> 6) & 0x3f];
     721          11 :         *p++ = ascii64[l & 0x3f];
     722          11 :         *p = 0;
     723             : 
     724          11 :         return(data->output);
     725             : }
     726             : 
     727             : #ifdef TEST
     728             : static char *
     729             : _crypt_extended(const char *key, const char *setting)
     730             : {
     731             :         static int initialized = 0;
     732             :         static struct php_crypt_extended_data data;
     733             : 
     734             :         if (!initialized) {
     735             :                 _crypt_extended_init();
     736             :                 initialized = 1;
     737             :                 data.initialized = 0;
     738             :         }
     739             :         return _crypt_extended_r(key, setting, &data);
     740             : }
     741             : 
     742             : #define crypt _crypt_extended
     743             : 
     744             : static struct {
     745             :         char *hash;
     746             :         char *pw;
     747             : } tests[] = {
     748             : /* "new"-style */
     749             :         {"_J9..CCCCXBrJUJV154M", "U*U*U*U*"},
     750             :         {"_J9..CCCCXUhOBTXzaiE", "U*U***U"},
     751             :         {"_J9..CCCC4gQ.mB/PffM", "U*U***U*"},
     752             :         {"_J9..XXXXvlzQGqpPPdk", "*U*U*U*U"},
     753             :         {"_J9..XXXXsqM/YSSP..Y", "*U*U*U*U*"},
     754             :         {"_J9..XXXXVL7qJCnku0I", "*U*U*U*U*U*U*U*U"},
     755             :         {"_J9..XXXXAj8cFbP5scI", "*U*U*U*U*U*U*U*U*"},
     756             :         {"_J9..SDizh.vll5VED9g", "ab1234567"},
     757             :         {"_J9..SDizRjWQ/zePPHc", "cr1234567"},
     758             :         {"_J9..SDizxmRI1GjnQuE", "zxyDPWgydbQjgq"},
     759             :         {"_K9..SaltNrQgIYUAeoY", "726 even"},
     760             :         {"_J9..SDSD5YGyRCr4W4c", ""},
     761             : /* "old"-style, valid salts */
     762             :         {"CCNf8Sbh3HDfQ", "U*U*U*U*"},
     763             :         {"CCX.K.MFy4Ois", "U*U***U"},
     764             :         {"CC4rMpbg9AMZ.", "U*U***U*"},
     765             :         {"XXxzOu6maQKqQ", "*U*U*U*U"},
     766             :         {"SDbsugeBiC58A", ""},
     767             :         {"./xZjzHv5vzVE", "password"},
     768             :         {"0A2hXM1rXbYgo", "password"},
     769             :         {"A9RXdR23Y.cY6", "password"},
     770             :         {"ZziFATVXHo2.6", "password"},
     771             :         {"zZDDIZ0NOlPzw", "password"},
     772             : /* "old"-style, "reasonable" invalid salts, UFC-crypt behavior expected */
     773             :         {"\001\002wyd0KZo65Jo", "password"},
     774             :         {"a_C10Dk/ExaG.", "password"},
     775             :         {"~\377.5OTsRVjwLo", "password"},
     776             : /* The below are erroneous inputs, so NULL return is expected/required */
     777             :         {"", ""}, /* no salt */
     778             :         {" ", ""}, /* setting string is too short */
     779             :         {"a:", ""}, /* unsafe character */
     780             :         {"\na", ""}, /* unsafe character */
     781             :         {"_/......", ""}, /* setting string is too short for its type */
     782             :         {"_........", ""}, /* zero iteration count */
     783             :         {"_/!......", ""}, /* invalid character in count */
     784             :         {"_/......!", ""}, /* invalid character in salt */
     785             :         {NULL}
     786             : };
     787             : 
     788             : int main(void)
     789             : {
     790             :         int i;
     791             : 
     792             :         for (i = 0; tests[i].hash; i++) {
     793             :                 char *hash = crypt(tests[i].pw, tests[i].hash);
     794             :                 if (!hash && strlen(tests[i].hash) < 13)
     795             :                         continue; /* expected failure */
     796             :                 if (!strcmp(hash, tests[i].hash))
     797             :                         continue; /* expected success */
     798             :                 puts("FAILED");
     799             :                 return 1;
     800             :         }
     801             : 
     802             :         puts("PASSED");
     803             : 
     804             :         return 0;
     805             : }
     806             : #endif

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