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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 : 64 : 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 : 64 : register long l=length;
122 : : DES_LONG tin[2];
123 : : unsigned char *iv;
124 : :
125 : 64 : in2 = &(*inw)[0];
126 : 64 : c2l(in2,inW0);
127 : 64 : c2l(in2,inW1);
128 : 64 : in2 = &(*outw)[0];
129 : 64 : c2l(in2,outW0);
130 : 64 : c2l(in2,outW1);
131 : :
132 : 64 : iv = &(*ivec)[0];
133 : :
134 [ + + ]: 64 : if (enc)
135 : : {
136 : 36 : c2l(iv,tout0);
137 : 36 : c2l(iv,tout1);
138 [ + + ]: 299 : for (l-=8; l>=0; l-=8)
139 : : {
140 : 263 : c2l(in,tin0);
141 : 263 : c2l(in,tin1);
142 : 263 : tin0^=tout0^inW0; tin[0]=tin0;
143 : 263 : tin1^=tout1^inW1; tin[1]=tin1;
144 : 263 : DES_encrypt1(tin,schedule,DES_ENCRYPT);
145 : 263 : tout0=tin[0]^outW0; l2c(tout0,out);
146 : 263 : tout1=tin[1]^outW1; l2c(tout1,out);
147 : : }
148 [ + + ]: 36 : if (l != -8)
149 : : {
150 [ - - - + : 1 : c2ln(in,tin0,tin1,l+8);
- - - -
- ]
151 : 1 : tin0^=tout0^inW0; tin[0]=tin0;
152 : 1 : tin1^=tout1^inW1; tin[1]=tin1;
153 : 1 : DES_encrypt1(tin,schedule,DES_ENCRYPT);
154 : 1 : tout0=tin[0]^outW0; l2c(tout0,out);
155 : 1 : tout1=tin[1]^outW1; l2c(tout1,out);
156 : : }
157 : 36 : iv = &(*ivec)[0];
158 : 36 : l2c(tout0,iv);
159 : 36 : l2c(tout1,iv);
160 : : }
161 : : else
162 : : {
163 : 28 : c2l(iv,xor0);
164 : 28 : c2l(iv,xor1);
165 [ + + ]: 264 : for (l-=8; l>0; l-=8)
166 : : {
167 : 236 : c2l(in,tin0); tin[0]=tin0^outW0;
168 : 236 : c2l(in,tin1); tin[1]=tin1^outW1;
169 : 236 : DES_encrypt1(tin,schedule,DES_DECRYPT);
170 : 236 : tout0=tin[0]^xor0^inW0;
171 : 236 : tout1=tin[1]^xor1^inW1;
172 : 236 : l2c(tout0,out);
173 : 236 : l2c(tout1,out);
174 : 236 : xor0=tin0;
175 : 236 : xor1=tin1;
176 : : }
177 [ + - ]: 28 : if (l != -8)
178 : : {
179 : 28 : c2l(in,tin0); tin[0]=tin0^outW0;
180 : 28 : c2l(in,tin1); tin[1]=tin1^outW1;
181 : 28 : DES_encrypt1(tin,schedule,DES_DECRYPT);
182 : 28 : tout0=tin[0]^xor0^inW0;
183 : 28 : tout1=tin[1]^xor1^inW1;
184 [ + - - + : 28 : l2cn(tout0,tout1,out,l+8);
- - - -
- ]
185 : 28 : xor0=tin0;
186 : 28 : xor1=tin1;
187 : : }
188 : :
189 : 28 : iv = &(*ivec)[0];
190 : 28 : l2c(xor0,iv);
191 : 28 : l2c(xor1,iv);
192 : : }
193 : 64 : tin0=tin1=tout0=tout1=xor0=xor1=0;
194 : 64 : inW0=inW1=outW0=outW1=0;
195 : : tin[0]=tin[1]=0;
196 : 64 : }
197 : :
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