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  • Committer: Bazaar Package Importer
  • Author(s): Kurt Roeckx
  • Date: 2011-03-23 19:50:31 UTC
  • Revision ID: james.westby@ubuntu.com-20110323195031-6h9crj4bymhhr8b8
Tags: upstream-0.9.8o
Import upstream version 0.9.8o

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crypto/des/xcbc_enc.c
 
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/* crypto/des/xcbc_enc.c */
 
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 
3
 * All rights reserved.
 
4
 *
 
5
 * This package is an SSL implementation written
 
6
 * by Eric Young (eay@cryptsoft.com).
 
7
 * The implementation was written so as to conform with Netscapes SSL.
 
8
 * 
 
9
 * This library is free for commercial and non-commercial use as long as
 
10
 * the following conditions are aheared to.  The following conditions
 
11
 * apply to all code found in this distribution, be it the RC4, RSA,
 
12
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 
13
 * included with this distribution is covered by the same copyright terms
 
14
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 
15
 * 
 
16
 * Copyright remains Eric Young's, and as such any Copyright notices in
 
17
 * the code are not to be removed.
 
18
 * If this package is used in a product, Eric Young should be given attribution
 
19
 * as the author of the parts of the library used.
 
20
 * This can be in the form of a textual message at program startup or
 
21
 * in documentation (online or textual) provided with the package.
 
22
 * 
 
23
 * Redistribution and use in source and binary forms, with or without
 
24
 * modification, are permitted provided that the following conditions
 
25
 * are met:
 
26
 * 1. Redistributions of source code must retain the copyright
 
27
 *    notice, this list of conditions and the following disclaimer.
 
28
 * 2. Redistributions in binary form must reproduce the above copyright
 
29
 *    notice, this list of conditions and the following disclaimer in the
 
30
 *    documentation and/or other materials provided with the distribution.
 
31
 * 3. All advertising materials mentioning features or use of this software
 
32
 *    must display the following acknowledgement:
 
33
 *    "This product includes cryptographic software written by
 
34
 *     Eric Young (eay@cryptsoft.com)"
 
35
 *    The word 'cryptographic' can be left out if the rouines from the library
 
36
 *    being used are not cryptographic related :-).
 
37
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 
38
 *    the apps directory (application code) you must include an acknowledgement:
 
39
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 
40
 * 
 
41
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 
42
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 
43
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 
44
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 
47
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 
48
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 
49
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 
50
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 
51
 * SUCH DAMAGE.
 
52
 * 
 
53
 * The licence and distribution terms for any publically available version or
 
54
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 
55
 * copied and put under another distribution licence
 
56
 * [including the GNU Public Licence.]
 
57
 */
 
58
 
 
59
#include "des_locl.h"
 
60
 
 
61
/* RSA's DESX */
 
62
 
 
63
#if 0 /* broken code, preserved just in case anyone specifically looks for this */
 
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static unsigned char desx_white_in2out[256]={
 
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0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
 
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0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
 
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0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
 
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0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
 
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0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
 
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0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
 
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0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
 
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0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
 
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0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
 
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0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
 
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0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
 
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0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
 
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0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
 
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0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
 
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0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
 
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0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
 
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        };
 
82
 
 
83
void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white,
 
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             DES_cblock *out_white)
 
85
        {
 
86
        int out0,out1;
 
87
        int i;
 
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        const unsigned char *key = &(*des_key)[0];
 
89
        const unsigned char *in = &(*in_white)[0];
 
90
        unsigned char *out = &(*out_white)[0];
 
91
 
 
92
        out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0;
 
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        out0=out1=0;
 
94
        for (i=0; i<8; i++)
 
95
                {
 
96
                out[i]=key[i]^desx_white_in2out[out0^out1];
 
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                out0=out1;
 
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                out1=(int)out[i&0x07];
 
99
                }
 
100
 
 
101
        out0=out[0];
 
102
        out1=out[i]; /* BUG: out-of-bounds read */
 
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        for (i=0; i<8; i++)
 
104
                {
 
105
                out[i]=in[i]^desx_white_in2out[out0^out1];
 
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                out0=out1;
 
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                out1=(int)out[i&0x07];
 
108
                }
 
109
        }
 
110
#endif
 
111
 
 
112
void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
 
113
                      long length, DES_key_schedule *schedule,
 
114
                      DES_cblock *ivec, const_DES_cblock *inw,
 
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                      const_DES_cblock *outw, int enc)
 
116
        {
 
117
        register DES_LONG tin0,tin1;
 
118
        register DES_LONG tout0,tout1,xor0,xor1;
 
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        register DES_LONG inW0,inW1,outW0,outW1;
 
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        register const unsigned char *in2;
 
121
        register long l=length;
 
122
        DES_LONG tin[2];
 
123
        unsigned char *iv;
 
124
 
 
125
        in2 = &(*inw)[0];
 
126
        c2l(in2,inW0);
 
127
        c2l(in2,inW1);
 
128
        in2 = &(*outw)[0];
 
129
        c2l(in2,outW0);
 
130
        c2l(in2,outW1);
 
131
 
 
132
        iv = &(*ivec)[0];
 
133
 
 
134
        if (enc)
 
135
                {
 
136
                c2l(iv,tout0);
 
137
                c2l(iv,tout1);
 
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                for (l-=8; l>=0; l-=8)
 
139
                        {
 
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                        c2l(in,tin0);
 
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                        c2l(in,tin1);
 
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                        tin0^=tout0^inW0; tin[0]=tin0;
 
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                        tin1^=tout1^inW1; tin[1]=tin1;
 
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                        DES_encrypt1(tin,schedule,DES_ENCRYPT);
 
145
                        tout0=tin[0]^outW0; l2c(tout0,out);
 
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                        tout1=tin[1]^outW1; l2c(tout1,out);
 
147
                        }
 
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                if (l != -8)
 
149
                        {
 
150
                        c2ln(in,tin0,tin1,l+8);
 
151
                        tin0^=tout0^inW0; tin[0]=tin0;
 
152
                        tin1^=tout1^inW1; tin[1]=tin1;
 
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                        DES_encrypt1(tin,schedule,DES_ENCRYPT);
 
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                        tout0=tin[0]^outW0; l2c(tout0,out);
 
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                        tout1=tin[1]^outW1; l2c(tout1,out);
 
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                        }
 
157
                iv = &(*ivec)[0];
 
158
                l2c(tout0,iv);
 
159
                l2c(tout1,iv);
 
160
                }
 
161
        else
 
162
                {
 
163
                c2l(iv,xor0);
 
164
                c2l(iv,xor1);
 
165
                for (l-=8; l>0; l-=8)
 
166
                        {
 
167
                        c2l(in,tin0); tin[0]=tin0^outW0;
 
168
                        c2l(in,tin1); tin[1]=tin1^outW1;
 
169
                        DES_encrypt1(tin,schedule,DES_DECRYPT);
 
170
                        tout0=tin[0]^xor0^inW0;
 
171
                        tout1=tin[1]^xor1^inW1;
 
172
                        l2c(tout0,out);
 
173
                        l2c(tout1,out);
 
174
                        xor0=tin0;
 
175
                        xor1=tin1;
 
176
                        }
 
177
                if (l != -8)
 
178
                        {
 
179
                        c2l(in,tin0); tin[0]=tin0^outW0;
 
180
                        c2l(in,tin1); tin[1]=tin1^outW1;
 
181
                        DES_encrypt1(tin,schedule,DES_DECRYPT);
 
182
                        tout0=tin[0]^xor0^inW0;
 
183
                        tout1=tin[1]^xor1^inW1;
 
184
                        l2cn(tout0,tout1,out,l+8);
 
185
                        xor0=tin0;
 
186
                        xor1=tin1;
 
187
                        }
 
188
 
 
189
                iv = &(*ivec)[0];
 
190
                l2c(xor0,iv);
 
191
                l2c(xor1,iv);
 
192
                }
 
193
        tin0=tin1=tout0=tout1=xor0=xor1=0;
 
194
        inW0=inW1=outW0=outW1=0;
 
195
        tin[0]=tin[1]=0;
 
196
        }
 
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