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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: 292 305 95.7 %
Date: 2014-07-21 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          35 : ascii_to_bin(char ch)
     189             : {
     190          35 :         signed char sch = ch;
     191             :         int retval;
     192             : 
     193          35 :         retval = sch - '.';
     194          35 :         if (sch >= 'A') {
     195           7 :                 retval = sch - ('A' - 12);
     196           7 :                 if (sch >= 'a')
     197           6 :                         retval = sch - ('a' - 38);
     198             :         }
     199          35 :         retval &= 0x3f;
     200             : 
     201          35 :         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          10 : ascii_is_unsafe(char ch)
     210             : {
     211          10 :         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 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           5 :         bits24 = (bits28 = bits32 + 4) + 4;
     228             : 
     229             :         /*
     230             :          * Invert the S-boxes, reordering the input bits.
     231             :          */
     232          45 :         for (i = 0; i < 8; i++)
     233        2600 :                 for (j = 0; j < 64; j++) {
     234        2560 :                         b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
     235        2560 :                         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          25 :         for (b = 0; b < 4; b++)
     243        1300 :                 for (i = 0; i < 64; i++)
     244       83200 :                         for (j = 0; j < 64; j++)
     245      245760 :                                 m_sbox[b][(i << 6) | j] =
     246       81920 :                                         (u_sbox[(b << 1)][i] << 4) |
     247       81920 :                                         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         325 :         for (i = 0; i < 64; i++) {
     254         320 :                 init_perm[final_perm[i] = IP[i] - 1] = i;
     255         320 :                 inv_key_perm[i] = 255;
     256             :         }
     257             : 
     258             :         /*
     259             :          * Invert the key permutation and initialise the inverted key
     260             :          * compression permutation.
     261             :          */
     262         285 :         for (i = 0; i < 56; i++) {
     263         280 :                 u_key_perm[i] = key_perm[i] - 1;
     264         280 :                 inv_key_perm[key_perm[i] - 1] = i;
     265         280 :                 inv_comp_perm[i] = 255;
     266             :         }
     267             : 
     268             :         /*
     269             :          * Invert the key compression permutation.
     270             :          */
     271         245 :         for (i = 0; i < 48; i++) {
     272         240 :                 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          45 :         for (k = 0; k < 8; k++) {
     280       10280 :                 for (i = 0; i < 256; i++) {
     281       10240 :                         *(il = &ip_maskl[k][i]) = 0;
     282       10240 :                         *(ir = &ip_maskr[k][i]) = 0;
     283       10240 :                         *(fl = &fp_maskl[k][i]) = 0;
     284       10240 :                         *(fr = &fp_maskr[k][i]) = 0;
     285       92160 :                         for (j = 0; j < 8; j++) {
     286       81920 :                                 inbit = 8 * k + j;
     287       81920 :                                 if (i & bits8[j]) {
     288       40960 :                                         if ((obit = init_perm[inbit]) < 32)
     289       20480 :                                                 *il |= bits32[obit];
     290             :                                         else
     291       20480 :                                                 *ir |= bits32[obit-32];
     292       40960 :                                         if ((obit = final_perm[inbit]) < 32)
     293       20480 :                                                 *fl |= bits32[obit];
     294             :                                         else
     295       20480 :                                                 *fr |= bits32[obit - 32];
     296             :                                 }
     297             :                         }
     298             :                 }
     299        5160 :                 for (i = 0; i < 128; i++) {
     300        5120 :                         *(il = &key_perm_maskl[k][i]) = 0;
     301        5120 :                         *(ir = &key_perm_maskr[k][i]) = 0;
     302       40960 :                         for (j = 0; j < 7; j++) {
     303       35840 :                                 inbit = 8 * k + j;
     304       35840 :                                 if (i & bits8[j + 1]) {
     305       17920 :                                         if ((obit = inv_key_perm[inbit]) == 255)
     306           0 :                                                 continue;
     307       17920 :                                         if (obit < 28)
     308        8960 :                                                 *il |= bits28[obit];
     309             :                                         else
     310        8960 :                                                 *ir |= bits28[obit - 28];
     311             :                                 }
     312             :                         }
     313        5120 :                         *(il = &comp_maskl[k][i]) = 0;
     314        5120 :                         *(ir = &comp_maskr[k][i]) = 0;
     315       40960 :                         for (j = 0; j < 7; j++) {
     316       35840 :                                 inbit = 7 * k + j;
     317       35840 :                                 if (i & bits8[j + 1]) {
     318       17920 :                                         if ((obit=inv_comp_perm[inbit]) == 255)
     319        2560 :                                                 continue;
     320       15360 :                                         if (obit < 24)
     321        7680 :                                                 *il |= bits24[obit];
     322             :                                         else
     323        7680 :                                                 *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         165 :         for (i = 0; i < 32; i++)
     334         160 :                 un_pbox[pbox[i] - 1] = i;
     335             : 
     336          25 :         for (b = 0; b < 4; b++)
     337        5140 :                 for (i = 0; i < 256; i++) {
     338        5120 :                         *(p = &psbox[b][i]) = 0;
     339       46080 :                         for (j = 0; j < 8; j++) {
     340       40960 :                                 if (i & bits8[j])
     341       20480 :                                         *p |= bits32[un_pbox[8 * b + j]];
     342             :                         }
     343             :                 }
     344           5 : }
     345             : 
     346             : static void
     347           9 : des_init_local(struct php_crypt_extended_data *data)
     348             : {
     349           9 :         data->old_rawkey0 = data->old_rawkey1 = 0;
     350           9 :         data->saltbits = 0;
     351           9 :         data->old_salt = 0;
     352             : 
     353           9 :         data->initialized = 1;
     354           9 : }
     355             : 
     356             : static void
     357          11 : setup_salt(uint32_t salt, struct php_crypt_extended_data *data)
     358             : {
     359             :         uint32_t        obit, saltbit, saltbits;
     360             :         int     i;
     361             : 
     362          11 :         if (salt == data->old_salt)
     363           3 :                 return;
     364           8 :         data->old_salt = salt;
     365             : 
     366           8 :         saltbits = 0;
     367           8 :         saltbit = 1;
     368           8 :         obit = 0x800000;
     369         200 :         for (i = 0; i < 24; i++) {
     370         192 :                 if (salt & saltbit)
     371          58 :                         saltbits |= obit;
     372         192 :                 saltbit <<= 1;
     373         192 :                 obit >>= 1;
     374             :         }
     375           8 :         data->saltbits = saltbits;
     376             : }
     377             : 
     378             : static int
     379          12 : 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          12 :         rawkey0 =
     385          12 :                 (uint32_t)(u_char)key[3] |
     386          12 :                 ((uint32_t)(u_char)key[2] << 8) |
     387          12 :                 ((uint32_t)(u_char)key[1] << 16) |
     388          12 :                 ((uint32_t)(u_char)key[0] << 24);
     389          12 :         rawkey1 =
     390          12 :                 (uint32_t)(u_char)key[7] |
     391          12 :                 ((uint32_t)(u_char)key[6] << 8) |
     392          12 :                 ((uint32_t)(u_char)key[5] << 16) |
     393          12 :                 ((uint32_t)(u_char)key[4] << 24);
     394             : 
     395          24 :         if ((rawkey0 | rawkey1)
     396             :             && rawkey0 == data->old_rawkey0
     397          12 :             && 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           0 :                 return(0);
     405             :         }
     406          12 :         data->old_rawkey0 = rawkey0;
     407          12 :         data->old_rawkey1 = rawkey1;
     408             : 
     409             :         /*
     410             :          *      Do key permutation and split into two 28-bit subkeys.
     411             :          */
     412          24 :         k0 = key_perm_maskl[0][rawkey0 >> 25]
     413          12 :            | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
     414          12 :            | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
     415          12 :            | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
     416          12 :            | key_perm_maskl[4][rawkey1 >> 25]
     417          12 :            | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
     418          12 :            | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
     419          12 :            | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
     420          24 :         k1 = key_perm_maskr[0][rawkey0 >> 25]
     421          12 :            | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
     422          12 :            | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
     423          12 :            | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
     424          12 :            | key_perm_maskr[4][rawkey1 >> 25]
     425          12 :            | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
     426          12 :            | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
     427          12 :            | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
     428             :         /*
     429             :          *      Rotate subkeys and do compression permutation.
     430             :          */
     431          12 :         shifts = 0;
     432         204 :         for (round = 0; round < 16; round++) {
     433             :                 uint32_t        t0, t1;
     434             : 
     435         192 :                 shifts += key_shifts[round];
     436             : 
     437         192 :                 t0 = (k0 << shifts) | (k0 >> (28 - shifts));
     438         192 :                 t1 = (k1 << shifts) | (k1 >> (28 - shifts));
     439             : 
     440         576 :                 data->de_keysl[15 - round] =
     441         576 :                 data->en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
     442         192 :                                 | comp_maskl[1][(t0 >> 14) & 0x7f]
     443         192 :                                 | comp_maskl[2][(t0 >> 7) & 0x7f]
     444         192 :                                 | comp_maskl[3][t0 & 0x7f]
     445         192 :                                 | comp_maskl[4][(t1 >> 21) & 0x7f]
     446         192 :                                 | comp_maskl[5][(t1 >> 14) & 0x7f]
     447         192 :                                 | comp_maskl[6][(t1 >> 7) & 0x7f]
     448         192 :                                 | comp_maskl[7][t1 & 0x7f];
     449             : 
     450         576 :                 data->de_keysr[15 - round] =
     451         576 :                 data->en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
     452         192 :                                 | comp_maskr[1][(t0 >> 14) & 0x7f]
     453         192 :                                 | comp_maskr[2][(t0 >> 7) & 0x7f]
     454         192 :                                 | comp_maskr[3][t0 & 0x7f]
     455         192 :                                 | comp_maskr[4][(t1 >> 21) & 0x7f]
     456         192 :                                 | comp_maskr[5][(t1 >> 14) & 0x7f]
     457         192 :                                 | comp_maskr[6][(t1 >> 7) & 0x7f]
     458         192 :                                 | comp_maskr[7][t1 & 0x7f];
     459             :         }
     460          12 :         return(0);
     461             : }
     462             : 
     463             : static int
     464          11 : 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          11 :         if (count == 0) {
     475           0 :                 return(1);
     476          11 :         } else if (count > 0) {
     477             :                 /*
     478             :                  * Encrypting
     479             :                  */
     480          11 :                 kl1 = data->en_keysl;
     481          11 :                 kr1 = data->en_keysr;
     482             :         } else {
     483             :                 /*
     484             :                  * Decrypting
     485             :                  */
     486           0 :                 count = -count;
     487           0 :                 kl1 = data->de_keysl;
     488           0 :                 kr1 = data->de_keysr;
     489             :         }
     490             : 
     491             :         /*
     492             :          *      Do initial permutation (IP).
     493             :          */
     494          22 :         l = ip_maskl[0][l_in >> 24]
     495          11 :           | ip_maskl[1][(l_in >> 16) & 0xff]
     496          11 :           | ip_maskl[2][(l_in >> 8) & 0xff]
     497          11 :           | ip_maskl[3][l_in & 0xff]
     498          11 :           | ip_maskl[4][r_in >> 24]
     499          11 :           | ip_maskl[5][(r_in >> 16) & 0xff]
     500          11 :           | ip_maskl[6][(r_in >> 8) & 0xff]
     501          11 :           | ip_maskl[7][r_in & 0xff];
     502          22 :         r = ip_maskr[0][l_in >> 24]
     503          11 :           | ip_maskr[1][(l_in >> 16) & 0xff]
     504          11 :           | ip_maskr[2][(l_in >> 8) & 0xff]
     505          11 :           | ip_maskr[3][l_in & 0xff]
     506          11 :           | ip_maskr[4][r_in >> 24]
     507          11 :           | ip_maskr[5][(r_in >> 16) & 0xff]
     508          11 :           | ip_maskr[6][(r_in >> 8) & 0xff]
     509          11 :           | ip_maskr[7][r_in & 0xff];
     510             : 
     511          11 :         saltbits = data->saltbits;
     512     2655471 :         while (count--) {
     513             :                 /*
     514             :                  * Do each round.
     515             :                  */
     516     2655449 :                 kl = kl1;
     517     2655449 :                 kr = kr1;
     518     2655449 :                 round = 16;
     519    47798082 :                 while (round--) {
     520             :                         /*
     521             :                          * Expand R to 48 bits (simulate the E-box).
     522             :                          */
     523    84974368 :                         r48l    = ((r & 0x00000001) << 23)
     524    42487184 :                                 | ((r & 0xf8000000) >> 9)
     525    42487184 :                                 | ((r & 0x1f800000) >> 11)
     526    42487184 :                                 | ((r & 0x01f80000) >> 13)
     527    42487184 :                                 | ((r & 0x001f8000) >> 15);
     528             : 
     529    84974368 :                         r48r    = ((r & 0x0001f800) << 7)
     530    42487184 :                                 | ((r & 0x00001f80) << 5)
     531    42487184 :                                 | ((r & 0x000001f8) << 3)
     532    42487184 :                                 | ((r & 0x0000001f) << 1)
     533    42487184 :                                 | ((r & 0x80000000) >> 31);
     534             :                         /*
     535             :                          * Do salting for crypt() and friends, and
     536             :                          * XOR with the permuted key.
     537             :                          */
     538    42487184 :                         f = (r48l ^ r48r) & saltbits;
     539    42487184 :                         r48l ^= f ^ *kl++;
     540    42487184 :                         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    84974368 :                         f = psbox[0][m_sbox[0][r48l >> 12]]
     546    42487184 :                           | psbox[1][m_sbox[1][r48l & 0xfff]]
     547    42487184 :                           | psbox[2][m_sbox[2][r48r >> 12]]
     548    42487184 :                           | psbox[3][m_sbox[3][r48r & 0xfff]];
     549             :                         /*
     550             :                          * Now that we've permuted things, complete f().
     551             :                          */
     552    42487184 :                         f ^= l;
     553    42487184 :                         l = r;
     554    42487184 :                         r = f;
     555             :                 }
     556     2655449 :                 r = l;
     557     2655449 :                 l = f;
     558             :         }
     559             :         /*
     560             :          * Do final permutation (inverse of IP).
     561             :          */
     562          22 :         *l_out  = fp_maskl[0][l >> 24]
     563          11 :                 | fp_maskl[1][(l >> 16) & 0xff]
     564          11 :                 | fp_maskl[2][(l >> 8) & 0xff]
     565          11 :                 | fp_maskl[3][l & 0xff]
     566          11 :                 | fp_maskl[4][r >> 24]
     567          11 :                 | fp_maskl[5][(r >> 16) & 0xff]
     568          11 :                 | fp_maskl[6][(r >> 8) & 0xff]
     569          11 :                 | fp_maskl[7][r & 0xff];
     570          22 :         *r_out  = fp_maskr[0][l >> 24]
     571          11 :                 | fp_maskr[1][(l >> 16) & 0xff]
     572          11 :                 | fp_maskr[2][(l >> 8) & 0xff]
     573          11 :                 | fp_maskr[3][l & 0xff]
     574          11 :                 | fp_maskr[4][r >> 24]
     575          11 :                 | fp_maskr[5][(r >> 16) & 0xff]
     576          11 :                 | fp_maskr[6][(r >> 8) & 0xff]
     577          11 :                 | fp_maskr[7][r & 0xff];
     578          11 :         return(0);
     579             : }
     580             : 
     581             : static int
     582           3 : 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           3 :         setup_salt(salt, data);
     589             : 
     590           3 :         rawl =
     591           3 :                 (uint32_t)(u_char)in[3] |
     592           3 :                 ((uint32_t)(u_char)in[2] << 8) |
     593           3 :                 ((uint32_t)(u_char)in[1] << 16) |
     594           3 :                 ((uint32_t)(u_char)in[0] << 24);
     595           3 :         rawr =
     596           3 :                 (uint32_t)(u_char)in[7] |
     597           3 :                 ((uint32_t)(u_char)in[6] << 8) |
     598           3 :                 ((uint32_t)(u_char)in[5] << 16) |
     599           3 :                 ((uint32_t)(u_char)in[4] << 24);
     600             : 
     601           3 :         retval = do_des(rawl, rawr, &l_out, &r_out, count, data);
     602             : 
     603           3 :         out[0] = l_out >> 24;
     604           3 :         out[1] = l_out >> 16;
     605           3 :         out[2] = l_out >> 8;
     606           3 :         out[3] = l_out;
     607           3 :         out[4] = r_out >> 24;
     608           3 :         out[5] = r_out >> 16;
     609           3 :         out[6] = r_out >> 8;
     610           3 :         out[7] = r_out;
     611             : 
     612           3 :         return(retval);
     613             : }
     614             : 
     615             : char *
     616           9 : _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           9 :         if (!data->initialized)
     624           9 :                 des_init_local(data);
     625             : 
     626             :         /*
     627             :          * Copy the key, shifting each character up by one bit
     628             :          * and padding with zeros.
     629             :          */
     630           9 :         q = (u_char *) keybuf;
     631          90 :         while (q - (u_char *) keybuf < sizeof(keybuf)) {
     632          72 :                 *q++ = *key << 1;
     633          72 :                 if (*key)
     634          55 :                         key++;
     635             :         }
     636           9 :         if (des_setkey((u_char *) keybuf, data))
     637           0 :                 return(NULL);
     638             : 
     639           9 :         if (*setting == _PASSWORD_EFMT1) {
     640             :                 /*
     641             :                  * "new"-style:
     642             :                  *      setting - underscore, 4 chars of count, 4 chars of salt
     643             :                  *      key - unlimited characters
     644             :                  */
     645          16 :                 for (i = 1, count = 0; i < 5; i++) {
     646          13 :                         int value = ascii_to_bin(setting[i]);
     647          13 :                         if (ascii64[value] != setting[i])
     648           1 :                                 return(NULL);
     649          12 :                         count |= value << (i - 1) * 6;
     650             :                 }
     651           3 :                 if (!count)
     652           0 :                         return(NULL);
     653             : 
     654          15 :                 for (i = 5, salt = 0; i < 9; i++) {
     655          12 :                         int value = ascii_to_bin(setting[i]);
     656          12 :                         if (ascii64[value] != setting[i])
     657           0 :                                 return(NULL);
     658          12 :                         salt |= value << (i - 5) * 6;
     659             :                 }
     660             : 
     661           9 :                 while (*key) {
     662             :                         /*
     663             :                          * Encrypt the key with itself.
     664             :                          */
     665           3 :                         if (des_cipher((u_char *) keybuf, (u_char *) keybuf,
     666             :                             0, 1, data))
     667           0 :                                 return(NULL);
     668             :                         /*
     669             :                          * And XOR with the next 8 characters of the key.
     670             :                          */
     671           3 :                         q = (u_char *) keybuf;
     672          15 :                         while (q - (u_char *) keybuf < sizeof(keybuf) && *key)
     673           9 :                                 *q++ ^= *key++ << 1;
     674             : 
     675           3 :                         if (des_setkey((u_char *) keybuf, data))
     676           0 :                                 return(NULL);
     677             :                 }
     678           3 :                 memcpy(data->output, setting, 9);
     679           3 :                 data->output[9] = '\0';
     680           3 :                 p = (u_char *) data->output + 9;
     681             :         } else {
     682             :                 /*
     683             :                  * "old"-style:
     684             :                  *      setting - 2 chars of salt
     685             :                  *      key - up to 8 characters
     686             :                  */
     687           5 :                 count = 25;
     688             : 
     689           5 :                 if (ascii_is_unsafe(setting[0]) || ascii_is_unsafe(setting[1]))
     690           0 :                         return(NULL);
     691             : 
     692          10 :                 salt = (ascii_to_bin(setting[1]) << 6)
     693           5 :                      |  ascii_to_bin(setting[0]);
     694             : 
     695           5 :                 data->output[0] = setting[0];
     696           5 :                 data->output[1] = setting[1];
     697           5 :                 p = (u_char *) data->output + 2;
     698             :         }
     699           8 :         setup_salt(salt, data);
     700             :         /*
     701             :          * Do it.
     702             :          */
     703           8 :         if (do_des(0, 0, &r0, &r1, count, data))
     704           0 :                 return(NULL);
     705             :         /*
     706             :          * Now encode the result...
     707             :          */
     708           8 :         l = (r0 >> 8);
     709           8 :         *p++ = ascii64[(l >> 18) & 0x3f];
     710           8 :         *p++ = ascii64[(l >> 12) & 0x3f];
     711           8 :         *p++ = ascii64[(l >> 6) & 0x3f];
     712           8 :         *p++ = ascii64[l & 0x3f];
     713             : 
     714           8 :         l = (r0 << 16) | ((r1 >> 16) & 0xffff);
     715           8 :         *p++ = ascii64[(l >> 18) & 0x3f];
     716           8 :         *p++ = ascii64[(l >> 12) & 0x3f];
     717           8 :         *p++ = ascii64[(l >> 6) & 0x3f];
     718           8 :         *p++ = ascii64[l & 0x3f];
     719             : 
     720           8 :         l = r1 << 2;
     721           8 :         *p++ = ascii64[(l >> 12) & 0x3f];
     722           8 :         *p++ = ascii64[(l >> 6) & 0x3f];
     723           8 :         *p++ = ascii64[l & 0x3f];
     724           8 :         *p = 0;
     725             : 
     726           8 :         return(data->output);
     727             : }
     728             : 
     729             : #ifdef TEST
     730             : static char *
     731             : _crypt_extended(const char *key, const char *setting)
     732             : {
     733             :         static int initialized = 0;
     734             :         static struct php_crypt_extended_data data;
     735             : 
     736             :         if (!initialized) {
     737             :                 _crypt_extended_init();
     738             :                 initialized = 1;
     739             :                 data.initialized = 0;
     740             :         }
     741             :         return _crypt_extended_r(key, setting, &data);
     742             : }
     743             : 
     744             : #define crypt _crypt_extended
     745             : 
     746             : static struct {
     747             :         char *hash;
     748             :         char *pw;
     749             : } tests[] = {
     750             : /* "new"-style */
     751             :         {"_J9..CCCCXBrJUJV154M", "U*U*U*U*"},
     752             :         {"_J9..CCCCXUhOBTXzaiE", "U*U***U"},
     753             :         {"_J9..CCCC4gQ.mB/PffM", "U*U***U*"},
     754             :         {"_J9..XXXXvlzQGqpPPdk", "*U*U*U*U"},
     755             :         {"_J9..XXXXsqM/YSSP..Y", "*U*U*U*U*"},
     756             :         {"_J9..XXXXVL7qJCnku0I", "*U*U*U*U*U*U*U*U"},
     757             :         {"_J9..XXXXAj8cFbP5scI", "*U*U*U*U*U*U*U*U*"},
     758             :         {"_J9..SDizh.vll5VED9g", "ab1234567"},
     759             :         {"_J9..SDizRjWQ/zePPHc", "cr1234567"},
     760             :         {"_J9..SDizxmRI1GjnQuE", "zxyDPWgydbQjgq"},
     761             :         {"_K9..SaltNrQgIYUAeoY", "726 even"},
     762             :         {"_J9..SDSD5YGyRCr4W4c", ""},
     763             : /* "old"-style, valid salts */
     764             :         {"CCNf8Sbh3HDfQ", "U*U*U*U*"},
     765             :         {"CCX.K.MFy4Ois", "U*U***U"},
     766             :         {"CC4rMpbg9AMZ.", "U*U***U*"},
     767             :         {"XXxzOu6maQKqQ", "*U*U*U*U"},
     768             :         {"SDbsugeBiC58A", ""},
     769             :         {"./xZjzHv5vzVE", "password"},
     770             :         {"0A2hXM1rXbYgo", "password"},
     771             :         {"A9RXdR23Y.cY6", "password"},
     772             :         {"ZziFATVXHo2.6", "password"},
     773             :         {"zZDDIZ0NOlPzw", "password"},
     774             : /* "old"-style, "reasonable" invalid salts, UFC-crypt behavior expected */
     775             :         {"\001\002wyd0KZo65Jo", "password"},
     776             :         {"a_C10Dk/ExaG.", "password"},
     777             :         {"~\377.5OTsRVjwLo", "password"},
     778             : /* The below are erroneous inputs, so NULL return is expected/required */
     779             :         {"", ""}, /* no salt */
     780             :         {" ", ""}, /* setting string is too short */
     781             :         {"a:", ""}, /* unsafe character */
     782             :         {"\na", ""}, /* unsafe character */
     783             :         {"_/......", ""}, /* setting string is too short for its type */
     784             :         {"_........", ""}, /* zero iteration count */
     785             :         {"_/!......", ""}, /* invalid character in count */
     786             :         {"_/......!", ""}, /* invalid character in salt */
     787             :         {NULL}
     788             : };
     789             : 
     790             : int main(void)
     791             : {
     792             :         int i;
     793             : 
     794             :         for (i = 0; tests[i].hash; i++) {
     795             :                 char *hash = crypt(tests[i].pw, tests[i].hash);
     796             :                 if (!hash && strlen(tests[i].hash) < 13)
     797             :                         continue; /* expected failure */
     798             :                 if (!strcmp(hash, tests[i].hash))
     799             :                         continue; /* expected success */
     800             :                 puts("FAILED");
     801             :                 return 1;
     802             :         }
     803             : 
     804             :         puts("PASSED");
     805             : 
     806             :         return 0;
     807             : }
     808             : #endif

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Generated at Tue, 22 Jul 2014 01:33:20 +0000 (2 days ago)

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