LCOV - code coverage report
Current view: top level - source4/heimdal/lib/hcrypto - md2.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 0 46 0.0 %
Date: 2021-09-23 10:06:22 Functions: 0 4 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2006 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions
       8             :  * are met:
       9             :  *
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  *
      13             :  * 2. Redistributions in binary form must reproduce the above copyright
      14             :  *    notice, this list of conditions and the following disclaimer in the
      15             :  *    documentation and/or other materials provided with the distribution.
      16             :  *
      17             :  * 3. Neither the name of the Institute nor the names of its contributors
      18             :  *    may be used to endorse or promote products derived from this software
      19             :  *    without specific prior written permission.
      20             :  *
      21             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31             :  * SUCH DAMAGE.
      32             :  */
      33             : 
      34             : #include "config.h"
      35             : 
      36             : #include "hash.h"
      37             : #include "md2.h"
      38             : 
      39             : static const unsigned char subst[256] = {
      40             :   41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
      41             :   19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
      42             :   76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
      43             :   138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
      44             :   245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
      45             :   148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
      46             :   39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
      47             :   181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
      48             :   150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
      49             :   112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
      50             :   96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
      51             :   85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
      52             :   234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
      53             :   129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
      54             :   8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
      55             :   203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
      56             :   166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
      57             :   31, 26, 219, 153, 141, 51, 159, 17, 131, 20
      58             : };
      59             : 
      60             : void
      61           0 : MD2_Init (struct md2 *m)
      62             : {
      63           0 :     memset(m, 0, sizeof(*m));
      64           0 : }
      65             : 
      66             : static void
      67           0 : calc(struct md2 *m, const void *v)
      68             : {
      69             :     unsigned char x[48], L;
      70           0 :     const unsigned char *p = v;
      71             :     int i, j, t;
      72             : 
      73           0 :     L = m->checksum[15];
      74           0 :     for (i = 0; i < 16; i++)
      75           0 :         L = m->checksum[i] ^= subst[p[i] ^ L];
      76             : 
      77           0 :     for (i = 0; i < 16; i++) {
      78           0 :         x[i]      = m->state[i];
      79           0 :         x[i + 16] = p[i];
      80           0 :         x[i + 32] = x[i] ^ p[i];
      81             :     }
      82             : 
      83           0 :     t = 0;
      84           0 :     for (i = 0; i < 18; i++) {
      85           0 :         for (j = 0; j < 48; j++)
      86           0 :             t = x[j] ^= subst[t];
      87           0 :         t = (t + i) & 0xff;
      88             :     }
      89             : 
      90           0 :     memcpy(m->state, x, 16);
      91           0 :     memset(x, 0, sizeof(x));
      92           0 : }
      93             : 
      94             : void
      95           0 : MD2_Update (struct md2 *m, const void *v, size_t len)
      96             : {
      97           0 :     size_t idx = m->len & 0xf;
      98           0 :     const unsigned char *p = v;
      99             : 
     100           0 :     m->len += len;
     101           0 :     if (len + idx >= 16) {
     102           0 :         if (idx) {
     103           0 :             memcpy(m->data + idx, p, 16 - idx);
     104           0 :             calc(m, m->data);
     105           0 :             p += 16;
     106           0 :             len -= 16 - idx;
     107             :         }
     108           0 :         while (len >= 16) {
     109           0 :             calc(m, p);
     110           0 :             p += 16;
     111           0 :             len -= 16;
     112             :         }
     113           0 :         idx = 0;
     114             :     }
     115             : 
     116           0 :     memcpy(m->data + idx, p, len);
     117           0 : }
     118             : 
     119             : void
     120           0 : MD2_Final (void *res, struct md2 *m)
     121             : {
     122             :     unsigned char pad[16];
     123             :     size_t padlen;
     124             : 
     125           0 :     padlen = 16 - (m->len % 16);
     126           0 :     memset(pad, padlen, padlen);
     127             : 
     128           0 :     MD2_Update(m, pad, padlen);
     129           0 :     memcpy(pad, m->checksum, 16);
     130           0 :     MD2_Update(m, pad, 16);
     131             : 
     132           0 :     memcpy(res, m->state, MD2_DIGEST_LENGTH);
     133           0 :     memset(m, 0, sizeof(*m));
     134           0 : }

Generated by: LCOV version 1.13