1 /* crypto/des/xcbc_enc.c */
2 /* 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
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * 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 */
64 static const unsigned char desx_white_in2out[256]={
65 0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
66 0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
67 0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
68 0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
69 0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
70 0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
71 0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
72 0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
73 0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
74 0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
75 0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
76 0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
77 0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
78 0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
79 0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
80 0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
81 };
82
83 void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white,
84 DES_cblock *out_white)
85 {
86 int out0,out1;
87 int i;
88 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;
93 out0=out1=0;
94 for (i=0; i<8; i++)
95 {
96 out[i]=key[i]^desx_white_in2out[out0^out1];
97 out0=out1;
98 out1=(int)out[i&0x07];
99 }
100
101 out0=out[0];
102 out1=out[i]; /* BUG: out-of-bounds read */
103 for (i=0; i<8; i++)
104 {
105 out[i]=in[i]^desx_white_in2out[out0^out1];
106 out0=out1;
107 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,
115 const_DES_cblock *outw, int enc)
116 {
117 register DES_LONG tin0,tin1;
118 register DES_LONG tout0,tout1,xor0,xor1;
119 register DES_LONG inW0,inW1,outW0,outW1;
120 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);
138 for (l-=8; l>=0; l-=8)
139 {
140 c2l(in,tin0);
141 c2l(in,tin1);
142 tin0^=tout0^inW0; tin[0]=tin0;
143 tin1^=tout1^inW1; tin[1]=tin1;
144 DES_encrypt1(tin,schedule,DES_ENCRYPT);
145 tout0=tin[0]^outW0; l2c(tout0,out);
146 tout1=tin[1]^outW1; l2c(tout1,out);
147 }
148 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;
153 DES_encrypt1(tin,schedule,DES_ENCRYPT);
154 tout0=tin[0]^outW0; l2c(tout0,out);
155 tout1=tin[1]^outW1; l2c(tout1,out);
156 }
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 }