1/*
2 * Copyright (c) 2005 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#ifndef HAVE_CCDESISWEAKKEY
37
38#include <sys/types.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <errno.h>
43
44#include <krb5-types.h>
45
46#include <CommonCrypto/CommonCryptor.h>
47#include "CCDGlue.h"
48
49static uint8_t weak_keys[][8] = {
50    {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, /* weak keys */
51    {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE},
52    {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E},
53    {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1},
54    {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, /* semi-weak keys */
55    {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01},
56    {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1},
57    {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E},
58    {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1},
59    {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01},
60    {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE},
61    {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E},
62    {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E},
63    {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01},
64    {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE},
65    {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}
66};
67
68CCCryptorStatus
69CCDesIsWeakKey(const void *key, size_t length)
70{
71    size_t n;
72
73    if (length != 8)
74        return -1;
75
76    for (n = 0; n < sizeof(weak_keys) / sizeof(weak_keys[0]); n++)
77        if (memcmp(weak_keys[n], key, 8) == 0)
78            return -1;
79
80    return 0;
81}
82
83static uint8_t odd_parity[256] = {
84    1,  1,  2,  2,  4,  4,  7,  7,  8,  8, 11, 11, 13, 13, 14, 14,
85    16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31,
86    32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47,
87    49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62,
88    64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79,
89    81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94,
90    97, 97, 98, 98,100,100,103,103,104,104,107,107,109,109,110,110,
91    112,112,115,115,117,117,118,118,121,121,122,122,124,124,127,127,
92    128,128,131,131,133,133,134,134,137,137,138,138,140,140,143,143,
93    145,145,146,146,148,148,151,151,152,152,155,155,157,157,158,158,
94    161,161,162,162,164,164,167,167,168,168,171,171,173,173,174,174,
95    176,176,179,179,181,181,182,182,185,185,186,186,188,188,191,191,
96    193,193,194,194,196,196,199,199,200,200,203,203,205,205,206,206,
97    208,208,211,211,213,213,214,214,217,217,218,218,220,220,223,223,
98    224,224,227,227,229,229,230,230,233,233,234,234,236,236,239,239,
99    241,241,242,242,244,244,247,247,248,248,251,251,253,253,254,254,
100};
101
102void
103CCDesSetOddParity(void *key, size_t Length)
104{
105    uint8_t *p = key;
106    size_t n;
107
108    for (n = 0; n < Length; n++)
109        p[n] = odd_parity[p[n]];
110
111}
112
113uint32_t
114CCDesCBCCksum(void *input, void *output,
115	      size_t length, void *key, size_t keylen,
116	      void *ivec)
117{
118    abort();
119}
120
121
122#endif
123