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LCOV - code coverage report
Current view: top level - ext/hash - hash_snefru.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 0 107 0.0 %
Date: 2014-04-16 Functions: 0 5 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   +----------------------------------------------------------------------+
       3             :   | PHP Version 5                                                        |
       4             :   +----------------------------------------------------------------------+
       5             :   | Copyright (c) 1997-2014 The PHP Group                                |
       6             :   +----------------------------------------------------------------------+
       7             :   | This source file is subject to version 3.01 of the PHP license,      |
       8             :   | that is bundled with this package in the file LICENSE, and is        |
       9             :   | available through the world-wide-web at the following url:           |
      10             :   | http://www.php.net/license/3_01.txt                                  |
      11             :   | If you did not receive a copy of the PHP license and are unable to   |
      12             :   | obtain it through the world-wide-web, please send a note to          |
      13             :   | license@php.net so we can mail you a copy immediately.               |
      14             :   +----------------------------------------------------------------------+
      15             :   | Authors: Michael Wallner <mike@php.net>                              |
      16             :   |          Sara Golemon <pollita@php.net>                              |
      17             :   +----------------------------------------------------------------------+
      18             : */
      19             : 
      20             : /* $Id$ */
      21             : 
      22             : #include "php_hash.h"
      23             : #include "php_hash_snefru.h"
      24             : #include "php_hash_snefru_tables.h"
      25             : 
      26             : #define round(L, C, N, SB)      \
      27             :         SBE = SB[C & 0xff]; \
      28             :         L ^= SBE; \
      29             :         N ^= SBE
      30             : 
      31             : #ifndef DBG_SNEFRU
      32             : #define DBG_SNEFRU 0
      33             : #endif
      34             : 
      35             : #if DBG_SNEFRU
      36             : void ph(php_hash_uint32 h[16])
      37             : {
      38             :         int i;
      39             :         for (i = 0; i < 16; i++)
      40             :                 printf ("%08lx", h[i]); printf("\n");
      41             : }
      42             : #endif
      43             : 
      44           0 : static inline void Snefru(php_hash_uint32 input[16])
      45             : {
      46             :         static int shifts[4] = {16, 8, 16, 24};
      47             :         int b, index, rshift, lshift;
      48             :         const php_hash_uint32 *t0,*t1;
      49             :         php_hash_uint32 SBE,B00,B01,B02,B03,B04,B05,B06,B07,B08,B09,B10,B11,B12,B13,B14,B15;
      50             : 
      51           0 :         B00 = input[0];
      52           0 :         B01 = input[1];
      53           0 :         B02 = input[2];
      54           0 :         B03 = input[3];
      55           0 :         B04 = input[4];
      56           0 :         B05 = input[5];
      57           0 :         B06 = input[6];
      58           0 :         B07 = input[7];
      59           0 :         B08 = input[8];
      60           0 :         B09 = input[9];
      61           0 :         B10 = input[10];
      62           0 :         B11 = input[11];
      63           0 :         B12 = input[12];
      64           0 :         B13 = input[13];
      65           0 :         B14 = input[14];
      66           0 :         B15 = input[15];
      67             : 
      68           0 :         for (index = 0; index < 8; index++) {
      69           0 :                 t0 = tables[2*index+0];
      70           0 :                 t1 = tables[2*index+1];
      71           0 :                 for (b = 0; b < 4; b++) {
      72           0 :                         round(B15, B00, B01, t0);
      73           0 :                         round(B00, B01, B02, t0);
      74           0 :                         round(B01, B02, B03, t1);
      75           0 :                         round(B02, B03, B04, t1);
      76           0 :                         round(B03, B04, B05, t0);
      77           0 :                         round(B04, B05, B06, t0);
      78           0 :                         round(B05, B06, B07, t1);
      79           0 :                         round(B06, B07, B08, t1);
      80           0 :                         round(B07, B08, B09, t0);
      81           0 :                         round(B08, B09, B10, t0);
      82           0 :                         round(B09, B10, B11, t1);
      83           0 :                         round(B10, B11, B12, t1);
      84           0 :                         round(B11, B12, B13, t0);
      85           0 :                         round(B12, B13, B14, t0);
      86           0 :                         round(B13, B14, B15, t1);
      87           0 :                         round(B14, B15, B00, t1);
      88             :                         
      89           0 :                         rshift = shifts[b]; 
      90           0 :                         lshift = 32-rshift;
      91             :                         
      92           0 :                         B00 = (B00 >> rshift) | (B00 << lshift);
      93           0 :                         B01 = (B01 >> rshift) | (B01 << lshift);
      94           0 :                         B02 = (B02 >> rshift) | (B02 << lshift);
      95           0 :                         B03 = (B03 >> rshift) | (B03 << lshift);
      96           0 :                         B04 = (B04 >> rshift) | (B04 << lshift);
      97           0 :                         B05 = (B05 >> rshift) | (B05 << lshift);
      98           0 :                         B06 = (B06 >> rshift) | (B06 << lshift);
      99           0 :                         B07 = (B07 >> rshift) | (B07 << lshift);
     100           0 :                         B08 = (B08 >> rshift) | (B08 << lshift);
     101           0 :                         B09 = (B09 >> rshift) | (B09 << lshift);
     102           0 :                         B10 = (B10 >> rshift) | (B10 << lshift);
     103           0 :                         B11 = (B11 >> rshift) | (B11 << lshift);
     104           0 :                         B12 = (B12 >> rshift) | (B12 << lshift);
     105           0 :                         B13 = (B13 >> rshift) | (B13 << lshift);
     106           0 :                         B14 = (B14 >> rshift) | (B14 << lshift);
     107           0 :                         B15 = (B15 >> rshift) | (B15 << lshift);
     108             :                 }
     109             :         }
     110           0 :         input[0] ^= B15;
     111           0 :         input[1] ^= B14;
     112           0 :         input[2] ^= B13;
     113           0 :         input[3] ^= B12;
     114           0 :         input[4] ^= B11;
     115           0 :         input[5] ^= B10;
     116           0 :         input[6] ^= B09;
     117           0 :         input[7] ^= B08;
     118             : #if DBG_SNEFRU
     119             :         ph(input);
     120             : #endif
     121           0 : }
     122             : 
     123           0 : static inline void SnefruTransform(PHP_SNEFRU_CTX *context, const unsigned char input[32])
     124             : {
     125             :         int i, j;
     126             : 
     127           0 :         for (i = 0, j = 0; i < 32; i += 4, ++j) {
     128           0 :                 context->state[8+j] =        ((input[i] & 0xff) << 24) | ((input[i+1] & 0xff) << 16) |
     129           0 :                                                                 ((input[i+2] & 0xff) << 8) | (input[i+3] & 0xff);
     130             :         }
     131           0 :         Snefru(context->state);
     132           0 :         memset(&context->state[8], 0, sizeof(php_hash_uint32) * 8);
     133           0 : }
     134             : 
     135           0 : PHP_HASH_API void PHP_SNEFRUInit(PHP_SNEFRU_CTX *context)
     136             : {
     137           0 :         memset(context, 0, sizeof(*context));
     138           0 : }
     139             : 
     140             : static const php_hash_uint32 MAX32 = 0xffffffffLU;
     141             : 
     142           0 : PHP_HASH_API void PHP_SNEFRUUpdate(PHP_SNEFRU_CTX *context, const unsigned char *input, size_t len)
     143             : {
     144           0 :         if ((MAX32 - context->count[1]) < (len * 8)) {
     145           0 :                 context->count[0]++;
     146           0 :                 context->count[1] = MAX32 - context->count[1];
     147           0 :                 context->count[1] = (len * 8) - context->count[1];
     148             :         } else {
     149           0 :                 context->count[1] += len * 8;
     150             :         }
     151             :         
     152           0 :         if (context->length + len < 32) {
     153           0 :                 memcpy(&context->buffer[context->length], input, len);
     154           0 :                 context->length += len;
     155             :         } else {
     156           0 :                 size_t i = 0, r = (context->length + len) % 32;
     157             :                 
     158           0 :                 if (context->length) {
     159           0 :                         i = 32 - context->length;
     160           0 :                         memcpy(&context->buffer[context->length], input, i);
     161           0 :                         SnefruTransform(context, context->buffer);
     162             :                 }
     163             :                 
     164           0 :                 for (; i + 32 <= len; i += 32) {
     165           0 :                         SnefruTransform(context, input + i);
     166             :                 }
     167             :                 
     168           0 :                 memcpy(context->buffer, input + i, r);
     169           0 :                 memset(&context->buffer[r], 0, 32 - r);
     170           0 :                 context->length = r;
     171             :         }
     172           0 : }
     173             : 
     174           0 : PHP_HASH_API void PHP_SNEFRUFinal(unsigned char digest[32], PHP_SNEFRU_CTX *context)
     175             : {
     176             :         php_hash_uint32 i, j;
     177             :         
     178           0 :         if (context->length) {
     179           0 :                 SnefruTransform(context, context->buffer);
     180             :         }
     181             :         
     182           0 :         context->state[14] = context->count[0];
     183           0 :         context->state[15] = context->count[1];
     184           0 :         Snefru(context->state);
     185             :         
     186           0 :         for (i = 0, j = 0; j < 32; i++, j += 4) {
     187           0 :                 digest[j] = (unsigned char) ((context->state[i] >> 24) & 0xff);
     188           0 :                 digest[j + 1] = (unsigned char) ((context->state[i] >> 16) & 0xff);
     189           0 :                 digest[j + 2] = (unsigned char) ((context->state[i] >> 8) & 0xff);
     190           0 :                 digest[j + 3] = (unsigned char) (context->state[i] & 0xff);
     191             :         }
     192             :         
     193           0 :         memset(context, 0, sizeof(*context));
     194           0 : }
     195             : 
     196             : const php_hash_ops php_hash_snefru_ops = {
     197             :         (php_hash_init_func_t) PHP_SNEFRUInit,
     198             :         (php_hash_update_func_t) PHP_SNEFRUUpdate,
     199             :         (php_hash_final_func_t) PHP_SNEFRUFinal,
     200             :         (php_hash_copy_func_t) php_hash_copy,
     201             :         32,
     202             :         32,
     203             :         sizeof(PHP_SNEFRU_CTX)
     204             : };
     205             : 
     206             : /*
     207             :  * Local variables:
     208             :  * tab-width: 4
     209             :  * c-basic-offset: 4
     210             :  * End:
     211             :  * vim600: sw=4 ts=4 fdm=marker
     212             :  * vim<600: sw=4 ts=4
     213             :  */

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Generated at Wed, 16 Apr 2014 12:47:48 +0000 (6 days ago)

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