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d02b48c6 | 1 | /* crypto/des/xcbc_enc.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 | static unsigned char desx_white_in2out[256]={ | |
64 | 0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0, | |
65 | 0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A, | |
66 | 0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36, | |
67 | 0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C, | |
68 | 0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60, | |
69 | 0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA, | |
70 | 0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E, | |
71 | 0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF, | |
72 | 0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6, | |
73 | 0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3, | |
74 | 0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C, | |
75 | 0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2, | |
76 | 0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5, | |
77 | 0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5, | |
78 | 0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F, | |
79 | 0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB, | |
80 | }; | |
81 | ||
6b691a5c UM |
82 | void des_xwhite_in2out(const des_cblock key, const des_cblock in, |
83 | des_cblock out) | |
d02b48c6 | 84 | { |
d02b48c6 RE |
85 | int out0,out1; |
86 | int i; | |
87 | ||
d02b48c6 RE |
88 | out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0; |
89 | out0=out1=0; | |
90 | for (i=0; i<8; i++) | |
91 | { | |
92 | out[i]=key[i]^desx_white_in2out[out0^out1]; | |
93 | out0=out1; | |
94 | out1=(int)out[i&0x07]; | |
95 | } | |
96 | ||
97 | out0=out[0]; | |
98 | out1=out[i]; | |
99 | for (i=0; i<8; i++) | |
100 | { | |
101 | out[i]=in[i]^desx_white_in2out[out0^out1]; | |
102 | out0=out1; | |
103 | out1=(int)out[i&0x07]; | |
104 | } | |
105 | } | |
106 | ||
6b691a5c UM |
107 | void des_xcbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
108 | des_key_schedule schedule, des_cblock ivec, const des_cblock inw, | |
109 | const des_cblock outw, int enc) | |
d02b48c6 RE |
110 | { |
111 | register DES_LONG tin0,tin1; | |
112 | register DES_LONG tout0,tout1,xor0,xor1; | |
113 | register DES_LONG inW0,inW1,outW0,outW1; | |
4e31df2c | 114 | register const unsigned char *in2; |
d02b48c6 RE |
115 | register long l=length; |
116 | DES_LONG tin[2]; | |
117 | unsigned char *iv; | |
118 | ||
4e31df2c BL |
119 | in2=inw; |
120 | c2l(in2,inW0); | |
121 | c2l(in2,inW1); | |
122 | in2=outw; | |
123 | c2l(in2,outW0); | |
124 | c2l(in2,outW1); | |
d02b48c6 | 125 | |
4e31df2c | 126 | iv=ivec; |
d02b48c6 RE |
127 | |
128 | if (enc) | |
129 | { | |
130 | c2l(iv,tout0); | |
131 | c2l(iv,tout1); | |
132 | for (l-=8; l>=0; l-=8) | |
133 | { | |
134 | c2l(in,tin0); | |
135 | c2l(in,tin1); | |
136 | tin0^=tout0^inW0; tin[0]=tin0; | |
137 | tin1^=tout1^inW1; tin[1]=tin1; | |
4e31df2c | 138 | des_encrypt(tin,schedule,DES_ENCRYPT); |
d02b48c6 RE |
139 | tout0=tin[0]^outW0; l2c(tout0,out); |
140 | tout1=tin[1]^outW1; l2c(tout1,out); | |
141 | } | |
142 | if (l != -8) | |
143 | { | |
144 | c2ln(in,tin0,tin1,l+8); | |
145 | tin0^=tout0^inW0; tin[0]=tin0; | |
146 | tin1^=tout1^inW1; tin[1]=tin1; | |
4e31df2c | 147 | des_encrypt(tin,schedule,DES_ENCRYPT); |
d02b48c6 RE |
148 | tout0=tin[0]^outW0; l2c(tout0,out); |
149 | tout1=tin[1]^outW1; l2c(tout1,out); | |
150 | } | |
4e31df2c | 151 | iv=ivec; |
d02b48c6 RE |
152 | l2c(tout0,iv); |
153 | l2c(tout1,iv); | |
154 | } | |
155 | else | |
156 | { | |
157 | c2l(iv,xor0); | |
158 | c2l(iv,xor1); | |
159 | for (l-=8; l>0; l-=8) | |
160 | { | |
161 | c2l(in,tin0); tin[0]=tin0^outW0; | |
162 | c2l(in,tin1); tin[1]=tin1^outW1; | |
4e31df2c | 163 | des_encrypt(tin,schedule,DES_DECRYPT); |
d02b48c6 RE |
164 | tout0=tin[0]^xor0^inW0; |
165 | tout1=tin[1]^xor1^inW1; | |
166 | l2c(tout0,out); | |
167 | l2c(tout1,out); | |
168 | xor0=tin0; | |
169 | xor1=tin1; | |
170 | } | |
171 | if (l != -8) | |
172 | { | |
173 | c2l(in,tin0); tin[0]=tin0^outW0; | |
174 | c2l(in,tin1); tin[1]=tin1^outW1; | |
4e31df2c | 175 | des_encrypt(tin,schedule,DES_DECRYPT); |
d02b48c6 RE |
176 | tout0=tin[0]^xor0^inW0; |
177 | tout1=tin[1]^xor1^inW1; | |
178 | l2cn(tout0,tout1,out,l+8); | |
179 | xor0=tin0; | |
180 | xor1=tin1; | |
181 | } | |
182 | ||
4e31df2c | 183 | iv=ivec; |
d02b48c6 RE |
184 | l2c(xor0,iv); |
185 | l2c(xor1,iv); | |
186 | } | |
187 | tin0=tin1=tout0=tout1=xor0=xor1=0; | |
188 | inW0=inW1=outW0=outW1=0; | |
189 | tin[0]=tin[1]=0; | |
190 | } | |
191 |