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[PATCH] x86: ptep_clear optimization
[linux-2.6/mini2440.git] / crypto / des.c
bloba3c863ddddedd381ba4ed96bffb3fc34e1e49fce
1 /*
2 * Cryptographic API.
3 *
4 * DES & Triple DES EDE Cipher Algorithms.
5 *
6 * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 */
14
15 #include <linux/bitops.h>
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/errno.h>
19 #include <linux/crypto.h>
20
21 #define DES_KEY_SIZE 8
22 #define DES_EXPKEY_WORDS 32
23 #define DES_BLOCK_SIZE 8
24
25 #define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE)
26 #define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS)
27 #define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE
28
29 #define ROL(x, r) ((x) = rol32((x), (r)))
30 #define ROR(x, r) ((x) = ror32((x), (r)))
31
32 struct des_ctx {
33 u32 expkey[DES_EXPKEY_WORDS];
34 };
35
36 struct des3_ede_ctx {
37 u32 expkey[DES3_EDE_EXPKEY_WORDS];
38 };
39
40 /* Lookup tables for key expansion */
41
42 static const u8 pc1[256] = {
43 0x00, 0x00, 0x40, 0x04, 0x10, 0x10, 0x50, 0x14,
44 0x04, 0x40, 0x44, 0x44, 0x14, 0x50, 0x54, 0x54,
45 0x02, 0x02, 0x42, 0x06, 0x12, 0x12, 0x52, 0x16,
46 0x06, 0x42, 0x46, 0x46, 0x16, 0x52, 0x56, 0x56,
47 0x80, 0x08, 0xc0, 0x0c, 0x90, 0x18, 0xd0, 0x1c,
48 0x84, 0x48, 0xc4, 0x4c, 0x94, 0x58, 0xd4, 0x5c,
49 0x82, 0x0a, 0xc2, 0x0e, 0x92, 0x1a, 0xd2, 0x1e,
50 0x86, 0x4a, 0xc6, 0x4e, 0x96, 0x5a, 0xd6, 0x5e,
51 0x20, 0x20, 0x60, 0x24, 0x30, 0x30, 0x70, 0x34,
52 0x24, 0x60, 0x64, 0x64, 0x34, 0x70, 0x74, 0x74,
53 0x22, 0x22, 0x62, 0x26, 0x32, 0x32, 0x72, 0x36,
54 0x26, 0x62, 0x66, 0x66, 0x36, 0x72, 0x76, 0x76,
55 0xa0, 0x28, 0xe0, 0x2c, 0xb0, 0x38, 0xf0, 0x3c,
56 0xa4, 0x68, 0xe4, 0x6c, 0xb4, 0x78, 0xf4, 0x7c,
57 0xa2, 0x2a, 0xe2, 0x2e, 0xb2, 0x3a, 0xf2, 0x3e,
58 0xa6, 0x6a, 0xe6, 0x6e, 0xb6, 0x7a, 0xf6, 0x7e,
59 0x08, 0x80, 0x48, 0x84, 0x18, 0x90, 0x58, 0x94,
60 0x0c, 0xc0, 0x4c, 0xc4, 0x1c, 0xd0, 0x5c, 0xd4,
61 0x0a, 0x82, 0x4a, 0x86, 0x1a, 0x92, 0x5a, 0x96,
62 0x0e, 0xc2, 0x4e, 0xc6, 0x1e, 0xd2, 0x5e, 0xd6,
63 0x88, 0x88, 0xc8, 0x8c, 0x98, 0x98, 0xd8, 0x9c,
64 0x8c, 0xc8, 0xcc, 0xcc, 0x9c, 0xd8, 0xdc, 0xdc,
65 0x8a, 0x8a, 0xca, 0x8e, 0x9a, 0x9a, 0xda, 0x9e,
66 0x8e, 0xca, 0xce, 0xce, 0x9e, 0xda, 0xde, 0xde,
67 0x28, 0xa0, 0x68, 0xa4, 0x38, 0xb0, 0x78, 0xb4,
68 0x2c, 0xe0, 0x6c, 0xe4, 0x3c, 0xf0, 0x7c, 0xf4,
69 0x2a, 0xa2, 0x6a, 0xa6, 0x3a, 0xb2, 0x7a, 0xb6,
70 0x2e, 0xe2, 0x6e, 0xe6, 0x3e, 0xf2, 0x7e, 0xf6,
71 0xa8, 0xa8, 0xe8, 0xac, 0xb8, 0xb8, 0xf8, 0xbc,
72 0xac, 0xe8, 0xec, 0xec, 0xbc, 0xf8, 0xfc, 0xfc,
73 0xaa, 0xaa, 0xea, 0xae, 0xba, 0xba, 0xfa, 0xbe,
74 0xae, 0xea, 0xee, 0xee, 0xbe, 0xfa, 0xfe, 0xfe
75 };
76
77 static const u8 rs[256] = {
78 0x00, 0x00, 0x80, 0x80, 0x02, 0x02, 0x82, 0x82,
79 0x04, 0x04, 0x84, 0x84, 0x06, 0x06, 0x86, 0x86,
80 0x08, 0x08, 0x88, 0x88, 0x0a, 0x0a, 0x8a, 0x8a,
81 0x0c, 0x0c, 0x8c, 0x8c, 0x0e, 0x0e, 0x8e, 0x8e,
82 0x10, 0x10, 0x90, 0x90, 0x12, 0x12, 0x92, 0x92,
83 0x14, 0x14, 0x94, 0x94, 0x16, 0x16, 0x96, 0x96,
84 0x18, 0x18, 0x98, 0x98, 0x1a, 0x1a, 0x9a, 0x9a,
85 0x1c, 0x1c, 0x9c, 0x9c, 0x1e, 0x1e, 0x9e, 0x9e,
86 0x20, 0x20, 0xa0, 0xa0, 0x22, 0x22, 0xa2, 0xa2,
87 0x24, 0x24, 0xa4, 0xa4, 0x26, 0x26, 0xa6, 0xa6,
88 0x28, 0x28, 0xa8, 0xa8, 0x2a, 0x2a, 0xaa, 0xaa,
89 0x2c, 0x2c, 0xac, 0xac, 0x2e, 0x2e, 0xae, 0xae,
90 0x30, 0x30, 0xb0, 0xb0, 0x32, 0x32, 0xb2, 0xb2,
91 0x34, 0x34, 0xb4, 0xb4, 0x36, 0x36, 0xb6, 0xb6,
92 0x38, 0x38, 0xb8, 0xb8, 0x3a, 0x3a, 0xba, 0xba,
93 0x3c, 0x3c, 0xbc, 0xbc, 0x3e, 0x3e, 0xbe, 0xbe,
94 0x40, 0x40, 0xc0, 0xc0, 0x42, 0x42, 0xc2, 0xc2,
95 0x44, 0x44, 0xc4, 0xc4, 0x46, 0x46, 0xc6, 0xc6,
96 0x48, 0x48, 0xc8, 0xc8, 0x4a, 0x4a, 0xca, 0xca,
97 0x4c, 0x4c, 0xcc, 0xcc, 0x4e, 0x4e, 0xce, 0xce,
98 0x50, 0x50, 0xd0, 0xd0, 0x52, 0x52, 0xd2, 0xd2,
99 0x54, 0x54, 0xd4, 0xd4, 0x56, 0x56, 0xd6, 0xd6,
100 0x58, 0x58, 0xd8, 0xd8, 0x5a, 0x5a, 0xda, 0xda,
101 0x5c, 0x5c, 0xdc, 0xdc, 0x5e, 0x5e, 0xde, 0xde,
102 0x60, 0x60, 0xe0, 0xe0, 0x62, 0x62, 0xe2, 0xe2,
103 0x64, 0x64, 0xe4, 0xe4, 0x66, 0x66, 0xe6, 0xe6,
104 0x68, 0x68, 0xe8, 0xe8, 0x6a, 0x6a, 0xea, 0xea,
105 0x6c, 0x6c, 0xec, 0xec, 0x6e, 0x6e, 0xee, 0xee,
106 0x70, 0x70, 0xf0, 0xf0, 0x72, 0x72, 0xf2, 0xf2,
107 0x74, 0x74, 0xf4, 0xf4, 0x76, 0x76, 0xf6, 0xf6,
108 0x78, 0x78, 0xf8, 0xf8, 0x7a, 0x7a, 0xfa, 0xfa,
109 0x7c, 0x7c, 0xfc, 0xfc, 0x7e, 0x7e, 0xfe, 0xfe
110 };
111
112 static const u32 pc2[1024] = {
113 0x00000000, 0x00000000, 0x00000000, 0x00000000,
114 0x00040000, 0x00000000, 0x04000000, 0x00100000,
115 0x00400000, 0x00000008, 0x00000800, 0x40000000,
116 0x00440000, 0x00000008, 0x04000800, 0x40100000,
117 0x00000400, 0x00000020, 0x08000000, 0x00000100,
118 0x00040400, 0x00000020, 0x0c000000, 0x00100100,
119 0x00400400, 0x00000028, 0x08000800, 0x40000100,
120 0x00440400, 0x00000028, 0x0c000800, 0x40100100,
121 0x80000000, 0x00000010, 0x00000000, 0x00800000,
122 0x80040000, 0x00000010, 0x04000000, 0x00900000,
123 0x80400000, 0x00000018, 0x00000800, 0x40800000,
124 0x80440000, 0x00000018, 0x04000800, 0x40900000,
125 0x80000400, 0x00000030, 0x08000000, 0x00800100,
126 0x80040400, 0x00000030, 0x0c000000, 0x00900100,
127 0x80400400, 0x00000038, 0x08000800, 0x40800100,
128 0x80440400, 0x00000038, 0x0c000800, 0x40900100,
129 0x10000000, 0x00000000, 0x00200000, 0x00001000,
130 0x10040000, 0x00000000, 0x04200000, 0x00101000,
131 0x10400000, 0x00000008, 0x00200800, 0x40001000,
132 0x10440000, 0x00000008, 0x04200800, 0x40101000,
133 0x10000400, 0x00000020, 0x08200000, 0x00001100,
134 0x10040400, 0x00000020, 0x0c200000, 0x00101100,
135 0x10400400, 0x00000028, 0x08200800, 0x40001100,
136 0x10440400, 0x00000028, 0x0c200800, 0x40101100,
137 0x90000000, 0x00000010, 0x00200000, 0x00801000,
138 0x90040000, 0x00000010, 0x04200000, 0x00901000,
139 0x90400000, 0x00000018, 0x00200800, 0x40801000,
140 0x90440000, 0x00000018, 0x04200800, 0x40901000,
141 0x90000400, 0x00000030, 0x08200000, 0x00801100,
142 0x90040400, 0x00000030, 0x0c200000, 0x00901100,
143 0x90400400, 0x00000038, 0x08200800, 0x40801100,
144 0x90440400, 0x00000038, 0x0c200800, 0x40901100,
145 0x00000200, 0x00080000, 0x00000000, 0x00000004,
146 0x00040200, 0x00080000, 0x04000000, 0x00100004,
147 0x00400200, 0x00080008, 0x00000800, 0x40000004,
148 0x00440200, 0x00080008, 0x04000800, 0x40100004,
149 0x00000600, 0x00080020, 0x08000000, 0x00000104,
150 0x00040600, 0x00080020, 0x0c000000, 0x00100104,
151 0x00400600, 0x00080028, 0x08000800, 0x40000104,
152 0x00440600, 0x00080028, 0x0c000800, 0x40100104,
153 0x80000200, 0x00080010, 0x00000000, 0x00800004,
154 0x80040200, 0x00080010, 0x04000000, 0x00900004,
155 0x80400200, 0x00080018, 0x00000800, 0x40800004,
156 0x80440200, 0x00080018, 0x04000800, 0x40900004,
157 0x80000600, 0x00080030, 0x08000000, 0x00800104,
158 0x80040600, 0x00080030, 0x0c000000, 0x00900104,
159 0x80400600, 0x00080038, 0x08000800, 0x40800104,
160 0x80440600, 0x00080038, 0x0c000800, 0x40900104,
161 0x10000200, 0x00080000, 0x00200000, 0x00001004,
162 0x10040200, 0x00080000, 0x04200000, 0x00101004,
163 0x10400200, 0x00080008, 0x00200800, 0x40001004,
164 0x10440200, 0x00080008, 0x04200800, 0x40101004,
165 0x10000600, 0x00080020, 0x08200000, 0x00001104,
166 0x10040600, 0x00080020, 0x0c200000, 0x00101104,
167 0x10400600, 0x00080028, 0x08200800, 0x40001104,
168 0x10440600, 0x00080028, 0x0c200800, 0x40101104,
169 0x90000200, 0x00080010, 0x00200000, 0x00801004,
170 0x90040200, 0x00080010, 0x04200000, 0x00901004,
171 0x90400200, 0x00080018, 0x00200800, 0x40801004,
172 0x90440200, 0x00080018, 0x04200800, 0x40901004,
173 0x90000600, 0x00080030, 0x08200000, 0x00801104,
174 0x90040600, 0x00080030, 0x0c200000, 0x00901104,
175 0x90400600, 0x00080038, 0x08200800, 0x40801104,
176 0x90440600, 0x00080038, 0x0c200800, 0x40901104,
177 0x00000002, 0x00002000, 0x20000000, 0x00000001,
178 0x00040002, 0x00002000, 0x24000000, 0x00100001,
179 0x00400002, 0x00002008, 0x20000800, 0x40000001,
180 0x00440002, 0x00002008, 0x24000800, 0x40100001,
181 0x00000402, 0x00002020, 0x28000000, 0x00000101,
182 0x00040402, 0x00002020, 0x2c000000, 0x00100101,
183 0x00400402, 0x00002028, 0x28000800, 0x40000101,
184 0x00440402, 0x00002028, 0x2c000800, 0x40100101,
185 0x80000002, 0x00002010, 0x20000000, 0x00800001,
186 0x80040002, 0x00002010, 0x24000000, 0x00900001,
187 0x80400002, 0x00002018, 0x20000800, 0x40800001,
188 0x80440002, 0x00002018, 0x24000800, 0x40900001,
189 0x80000402, 0x00002030, 0x28000000, 0x00800101,
190 0x80040402, 0x00002030, 0x2c000000, 0x00900101,
191 0x80400402, 0x00002038, 0x28000800, 0x40800101,
192 0x80440402, 0x00002038, 0x2c000800, 0x40900101,
193 0x10000002, 0x00002000, 0x20200000, 0x00001001,
194 0x10040002, 0x00002000, 0x24200000, 0x00101001,
195 0x10400002, 0x00002008, 0x20200800, 0x40001001,
196 0x10440002, 0x00002008, 0x24200800, 0x40101001,
197 0x10000402, 0x00002020, 0x28200000, 0x00001101,
198 0x10040402, 0x00002020, 0x2c200000, 0x00101101,
199 0x10400402, 0x00002028, 0x28200800, 0x40001101,
200 0x10440402, 0x00002028, 0x2c200800, 0x40101101,
201 0x90000002, 0x00002010, 0x20200000, 0x00801001,
202 0x90040002, 0x00002010, 0x24200000, 0x00901001,
203 0x90400002, 0x00002018, 0x20200800, 0x40801001,
204 0x90440002, 0x00002018, 0x24200800, 0x40901001,
205 0x90000402, 0x00002030, 0x28200000, 0x00801101,
206 0x90040402, 0x00002030, 0x2c200000, 0x00901101,
207 0x90400402, 0x00002038, 0x28200800, 0x40801101,
208 0x90440402, 0x00002038, 0x2c200800, 0x40901101,
209 0x00000202, 0x00082000, 0x20000000, 0x00000005,
210 0x00040202, 0x00082000, 0x24000000, 0x00100005,
211 0x00400202, 0x00082008, 0x20000800, 0x40000005,
212 0x00440202, 0x00082008, 0x24000800, 0x40100005,
213 0x00000602, 0x00082020, 0x28000000, 0x00000105,
214 0x00040602, 0x00082020, 0x2c000000, 0x00100105,
215 0x00400602, 0x00082028, 0x28000800, 0x40000105,
216 0x00440602, 0x00082028, 0x2c000800, 0x40100105,
217 0x80000202, 0x00082010, 0x20000000, 0x00800005,
218 0x80040202, 0x00082010, 0x24000000, 0x00900005,
219 0x80400202, 0x00082018, 0x20000800, 0x40800005,
220 0x80440202, 0x00082018, 0x24000800, 0x40900005,
221 0x80000602, 0x00082030, 0x28000000, 0x00800105,
222 0x80040602, 0x00082030, 0x2c000000, 0x00900105,
223 0x80400602, 0x00082038, 0x28000800, 0x40800105,
224 0x80440602, 0x00082038, 0x2c000800, 0x40900105,
225 0x10000202, 0x00082000, 0x20200000, 0x00001005,
226 0x10040202, 0x00082000, 0x24200000, 0x00101005,
227 0x10400202, 0x00082008, 0x20200800, 0x40001005,
228 0x10440202, 0x00082008, 0x24200800, 0x40101005,
229 0x10000602, 0x00082020, 0x28200000, 0x00001105,
230 0x10040602, 0x00082020, 0x2c200000, 0x00101105,
231 0x10400602, 0x00082028, 0x28200800, 0x40001105,
232 0x10440602, 0x00082028, 0x2c200800, 0x40101105,
233 0x90000202, 0x00082010, 0x20200000, 0x00801005,
234 0x90040202, 0x00082010, 0x24200000, 0x00901005,
235 0x90400202, 0x00082018, 0x20200800, 0x40801005,
236 0x90440202, 0x00082018, 0x24200800, 0x40901005,
237 0x90000602, 0x00082030, 0x28200000, 0x00801105,
238 0x90040602, 0x00082030, 0x2c200000, 0x00901105,
239 0x90400602, 0x00082038, 0x28200800, 0x40801105,
240 0x90440602, 0x00082038, 0x2c200800, 0x40901105,
241
242 0x00000000, 0x00000000, 0x00000000, 0x00000000,
243 0x00000000, 0x00000008, 0x00080000, 0x10000000,
244 0x02000000, 0x00000000, 0x00000080, 0x00001000,
245 0x02000000, 0x00000008, 0x00080080, 0x10001000,
246 0x00004000, 0x00000000, 0x00000040, 0x00040000,
247 0x00004000, 0x00000008, 0x00080040, 0x10040000,
248 0x02004000, 0x00000000, 0x000000c0, 0x00041000,
249 0x02004000, 0x00000008, 0x000800c0, 0x10041000,
250 0x00020000, 0x00008000, 0x08000000, 0x00200000,
251 0x00020000, 0x00008008, 0x08080000, 0x10200000,
252 0x02020000, 0x00008000, 0x08000080, 0x00201000,
253 0x02020000, 0x00008008, 0x08080080, 0x10201000,
254 0x00024000, 0x00008000, 0x08000040, 0x00240000,
255 0x00024000, 0x00008008, 0x08080040, 0x10240000,
256 0x02024000, 0x00008000, 0x080000c0, 0x00241000,
257 0x02024000, 0x00008008, 0x080800c0, 0x10241000,
258 0x00000000, 0x01000000, 0x00002000, 0x00000020,
259 0x00000000, 0x01000008, 0x00082000, 0x10000020,
260 0x02000000, 0x01000000, 0x00002080, 0x00001020,
261 0x02000000, 0x01000008, 0x00082080, 0x10001020,
262 0x00004000, 0x01000000, 0x00002040, 0x00040020,
263 0x00004000, 0x01000008, 0x00082040, 0x10040020,
264 0x02004000, 0x01000000, 0x000020c0, 0x00041020,
265 0x02004000, 0x01000008, 0x000820c0, 0x10041020,
266 0x00020000, 0x01008000, 0x08002000, 0x00200020,
267 0x00020000, 0x01008008, 0x08082000, 0x10200020,
268 0x02020000, 0x01008000, 0x08002080, 0x00201020,
269 0x02020000, 0x01008008, 0x08082080, 0x10201020,
270 0x00024000, 0x01008000, 0x08002040, 0x00240020,
271 0x00024000, 0x01008008, 0x08082040, 0x10240020,
272 0x02024000, 0x01008000, 0x080020c0, 0x00241020,
273 0x02024000, 0x01008008, 0x080820c0, 0x10241020,
274 0x00000400, 0x04000000, 0x00100000, 0x00000004,
275 0x00000400, 0x04000008, 0x00180000, 0x10000004,
276 0x02000400, 0x04000000, 0x00100080, 0x00001004,
277 0x02000400, 0x04000008, 0x00180080, 0x10001004,
278 0x00004400, 0x04000000, 0x00100040, 0x00040004,
279 0x00004400, 0x04000008, 0x00180040, 0x10040004,
280 0x02004400, 0x04000000, 0x001000c0, 0x00041004,
281 0x02004400, 0x04000008, 0x001800c0, 0x10041004,
282 0x00020400, 0x04008000, 0x08100000, 0x00200004,
283 0x00020400, 0x04008008, 0x08180000, 0x10200004,
284 0x02020400, 0x04008000, 0x08100080, 0x00201004,
285 0x02020400, 0x04008008, 0x08180080, 0x10201004,
286 0x00024400, 0x04008000, 0x08100040, 0x00240004,
287 0x00024400, 0x04008008, 0x08180040, 0x10240004,
288 0x02024400, 0x04008000, 0x081000c0, 0x00241004,
289 0x02024400, 0x04008008, 0x081800c0, 0x10241004,
290 0x00000400, 0x05000000, 0x00102000, 0x00000024,
291 0x00000400, 0x05000008, 0x00182000, 0x10000024,
292 0x02000400, 0x05000000, 0x00102080, 0x00001024,
293 0x02000400, 0x05000008, 0x00182080, 0x10001024,
294 0x00004400, 0x05000000, 0x00102040, 0x00040024,
295 0x00004400, 0x05000008, 0x00182040, 0x10040024,
296 0x02004400, 0x05000000, 0x001020c0, 0x00041024,
297 0x02004400, 0x05000008, 0x001820c0, 0x10041024,
298 0x00020400, 0x05008000, 0x08102000, 0x00200024,
299 0x00020400, 0x05008008, 0x08182000, 0x10200024,
300 0x02020400, 0x05008000, 0x08102080, 0x00201024,
301 0x02020400, 0x05008008, 0x08182080, 0x10201024,
302 0x00024400, 0x05008000, 0x08102040, 0x00240024,
303 0x00024400, 0x05008008, 0x08182040, 0x10240024,
304 0x02024400, 0x05008000, 0x081020c0, 0x00241024,
305 0x02024400, 0x05008008, 0x081820c0, 0x10241024,
306 0x00000800, 0x00010000, 0x20000000, 0x00000010,
307 0x00000800, 0x00010008, 0x20080000, 0x10000010,
308 0x02000800, 0x00010000, 0x20000080, 0x00001010,
309 0x02000800, 0x00010008, 0x20080080, 0x10001010,
310 0x00004800, 0x00010000, 0x20000040, 0x00040010,
311 0x00004800, 0x00010008, 0x20080040, 0x10040010,
312 0x02004800, 0x00010000, 0x200000c0, 0x00041010,
313 0x02004800, 0x00010008, 0x200800c0, 0x10041010,
314 0x00020800, 0x00018000, 0x28000000, 0x00200010,
315 0x00020800, 0x00018008, 0x28080000, 0x10200010,
316 0x02020800, 0x00018000, 0x28000080, 0x00201010,
317 0x02020800, 0x00018008, 0x28080080, 0x10201010,
318 0x00024800, 0x00018000, 0x28000040, 0x00240010,
319 0x00024800, 0x00018008, 0x28080040, 0x10240010,
320 0x02024800, 0x00018000, 0x280000c0, 0x00241010,
321 0x02024800, 0x00018008, 0x280800c0, 0x10241010,
322 0x00000800, 0x01010000, 0x20002000, 0x00000030,
323 0x00000800, 0x01010008, 0x20082000, 0x10000030,
324 0x02000800, 0x01010000, 0x20002080, 0x00001030,
325 0x02000800, 0x01010008, 0x20082080, 0x10001030,
326 0x00004800, 0x01010000, 0x20002040, 0x00040030,
327 0x00004800, 0x01010008, 0x20082040, 0x10040030,
328 0x02004800, 0x01010000, 0x200020c0, 0x00041030,
329 0x02004800, 0x01010008, 0x200820c0, 0x10041030,
330 0x00020800, 0x01018000, 0x28002000, 0x00200030,
331 0x00020800, 0x01018008, 0x28082000, 0x10200030,
332 0x02020800, 0x01018000, 0x28002080, 0x00201030,
333 0x02020800, 0x01018008, 0x28082080, 0x10201030,
334 0x00024800, 0x01018000, 0x28002040, 0x00240030,
335 0x00024800, 0x01018008, 0x28082040, 0x10240030,
336 0x02024800, 0x01018000, 0x280020c0, 0x00241030,
337 0x02024800, 0x01018008, 0x280820c0, 0x10241030,
338 0x00000c00, 0x04010000, 0x20100000, 0x00000014,
339 0x00000c00, 0x04010008, 0x20180000, 0x10000014,
340 0x02000c00, 0x04010000, 0x20100080, 0x00001014,
341 0x02000c00, 0x04010008, 0x20180080, 0x10001014,
342 0x00004c00, 0x04010000, 0x20100040, 0x00040014,
343 0x00004c00, 0x04010008, 0x20180040, 0x10040014,
344 0x02004c00, 0x04010000, 0x201000c0, 0x00041014,
345 0x02004c00, 0x04010008, 0x201800c0, 0x10041014,
346 0x00020c00, 0x04018000, 0x28100000, 0x00200014,
347 0x00020c00, 0x04018008, 0x28180000, 0x10200014,
348 0x02020c00, 0x04018000, 0x28100080, 0x00201014,
349 0x02020c00, 0x04018008, 0x28180080, 0x10201014,
350 0x00024c00, 0x04018000, 0x28100040, 0x00240014,
351 0x00024c00, 0x04018008, 0x28180040, 0x10240014,
352 0x02024c00, 0x04018000, 0x281000c0, 0x00241014,
353 0x02024c00, 0x04018008, 0x281800c0, 0x10241014,
354 0x00000c00, 0x05010000, 0x20102000, 0x00000034,
355 0x00000c00, 0x05010008, 0x20182000, 0x10000034,
356 0x02000c00, 0x05010000, 0x20102080, 0x00001034,
357 0x02000c00, 0x05010008, 0x20182080, 0x10001034,
358 0x00004c00, 0x05010000, 0x20102040, 0x00040034,
359 0x00004c00, 0x05010008, 0x20182040, 0x10040034,
360 0x02004c00, 0x05010000, 0x201020c0, 0x00041034,
361 0x02004c00, 0x05010008, 0x201820c0, 0x10041034,
362 0x00020c00, 0x05018000, 0x28102000, 0x00200034,
363 0x00020c00, 0x05018008, 0x28182000, 0x10200034,
364 0x02020c00, 0x05018000, 0x28102080, 0x00201034,
365 0x02020c00, 0x05018008, 0x28182080, 0x10201034,
366 0x00024c00, 0x05018000, 0x28102040, 0x00240034,
367 0x00024c00, 0x05018008, 0x28182040, 0x10240034,
368 0x02024c00, 0x05018000, 0x281020c0, 0x00241034,
369 0x02024c00, 0x05018008, 0x281820c0, 0x10241034
370 };
371
372 /* S-box lookup tables */
373
374 static const u32 S1[64] = {
375 0x01010400, 0x00000000, 0x00010000, 0x01010404,
376 0x01010004, 0x00010404, 0x00000004, 0x00010000,
377 0x00000400, 0x01010400, 0x01010404, 0x00000400,
378 0x01000404, 0x01010004, 0x01000000, 0x00000004,
379 0x00000404, 0x01000400, 0x01000400, 0x00010400,
380 0x00010400, 0x01010000, 0x01010000, 0x01000404,
381 0x00010004, 0x01000004, 0x01000004, 0x00010004,
382 0x00000000, 0x00000404, 0x00010404, 0x01000000,
383 0x00010000, 0x01010404, 0x00000004, 0x01010000,
384 0x01010400, 0x01000000, 0x01000000, 0x00000400,
385 0x01010004, 0x00010000, 0x00010400, 0x01000004,
386 0x00000400, 0x00000004, 0x01000404, 0x00010404,
387 0x01010404, 0x00010004, 0x01010000, 0x01000404,
388 0x01000004, 0x00000404, 0x00010404, 0x01010400,
389 0x00000404, 0x01000400, 0x01000400, 0x00000000,
390 0x00010004, 0x00010400, 0x00000000, 0x01010004
391 };
392
393 static const u32 S2[64] = {
394 0x80108020, 0x80008000, 0x00008000, 0x00108020,
395 0x00100000, 0x00000020, 0x80100020, 0x80008020,
396 0x80000020, 0x80108020, 0x80108000, 0x80000000,
397 0x80008000, 0x00100000, 0x00000020, 0x80100020,
398 0x00108000, 0x00100020, 0x80008020, 0x00000000,
399 0x80000000, 0x00008000, 0x00108020, 0x80100000,
400 0x00100020, 0x80000020, 0x00000000, 0x00108000,
401 0x00008020, 0x80108000, 0x80100000, 0x00008020,
402 0x00000000, 0x00108020, 0x80100020, 0x00100000,
403 0x80008020, 0x80100000, 0x80108000, 0x00008000,
404 0x80100000, 0x80008000, 0x00000020, 0x80108020,
405 0x00108020, 0x00000020, 0x00008000, 0x80000000,
406 0x00008020, 0x80108000, 0x00100000, 0x80000020,
407 0x00100020, 0x80008020, 0x80000020, 0x00100020,
408 0x00108000, 0x00000000, 0x80008000, 0x00008020,
409 0x80000000, 0x80100020, 0x80108020, 0x00108000
410 };
411
412 static const u32 S3[64] = {
413 0x00000208, 0x08020200, 0x00000000, 0x08020008,
414 0x08000200, 0x00000000, 0x00020208, 0x08000200,
415 0x00020008, 0x08000008, 0x08000008, 0x00020000,
416 0x08020208, 0x00020008, 0x08020000, 0x00000208,
417 0x08000000, 0x00000008, 0x08020200, 0x00000200,
418 0x00020200, 0x08020000, 0x08020008, 0x00020208,
419 0x08000208, 0x00020200, 0x00020000, 0x08000208,
420 0x00000008, 0x08020208, 0x00000200, 0x08000000,
421 0x08020200, 0x08000000, 0x00020008, 0x00000208,
422 0x00020000, 0x08020200, 0x08000200, 0x00000000,
423 0x00000200, 0x00020008, 0x08020208, 0x08000200,
424 0x08000008, 0x00000200, 0x00000000, 0x08020008,
425 0x08000208, 0x00020000, 0x08000000, 0x08020208,
426 0x00000008, 0x00020208, 0x00020200, 0x08000008,
427 0x08020000, 0x08000208, 0x00000208, 0x08020000,
428 0x00020208, 0x00000008, 0x08020008, 0x00020200
429 };
430
431 static const u32 S4[64] = {
432 0x00802001, 0x00002081, 0x00002081, 0x00000080,
433 0x00802080, 0x00800081, 0x00800001, 0x00002001,
434 0x00000000, 0x00802000, 0x00802000, 0x00802081,
435 0x00000081, 0x00000000, 0x00800080, 0x00800001,
436 0x00000001, 0x00002000, 0x00800000, 0x00802001,
437 0x00000080, 0x00800000, 0x00002001, 0x00002080,
438 0x00800081, 0x00000001, 0x00002080, 0x00800080,
439 0x00002000, 0x00802080, 0x00802081, 0x00000081,
440 0x00800080, 0x00800001, 0x00802000, 0x00802081,
441 0x00000081, 0x00000000, 0x00000000, 0x00802000,
442 0x00002080, 0x00800080, 0x00800081, 0x00000001,
443 0x00802001, 0x00002081, 0x00002081, 0x00000080,
444 0x00802081, 0x00000081, 0x00000001, 0x00002000,
445 0x00800001, 0x00002001, 0x00802080, 0x00800081,
446 0x00002001, 0x00002080, 0x00800000, 0x00802001,
447 0x00000080, 0x00800000, 0x00002000, 0x00802080
448 };
449
450 static const u32 S5[64] = {
451 0x00000100, 0x02080100, 0x02080000, 0x42000100,
452 0x00080000, 0x00000100, 0x40000000, 0x02080000,
453 0x40080100, 0x00080000, 0x02000100, 0x40080100,
454 0x42000100, 0x42080000, 0x00080100, 0x40000000,
455 0x02000000, 0x40080000, 0x40080000, 0x00000000,
456 0x40000100, 0x42080100, 0x42080100, 0x02000100,
457 0x42080000, 0x40000100, 0x00000000, 0x42000000,
458 0x02080100, 0x02000000, 0x42000000, 0x00080100,
459 0x00080000, 0x42000100, 0x00000100, 0x02000000,
460 0x40000000, 0x02080000, 0x42000100, 0x40080100,
461 0x02000100, 0x40000000, 0x42080000, 0x02080100,
462 0x40080100, 0x00000100, 0x02000000, 0x42080000,
463 0x42080100, 0x00080100, 0x42000000, 0x42080100,
464 0x02080000, 0x00000000, 0x40080000, 0x42000000,
465 0x00080100, 0x02000100, 0x40000100, 0x00080000,
466 0x00000000, 0x40080000, 0x02080100, 0x40000100
467 };
468
469 static const u32 S6[64] = {
470 0x20000010, 0x20400000, 0x00004000, 0x20404010,
471 0x20400000, 0x00000010, 0x20404010, 0x00400000,
472 0x20004000, 0x00404010, 0x00400000, 0x20000010,
473 0x00400010, 0x20004000, 0x20000000, 0x00004010,
474 0x00000000, 0x00400010, 0x20004010, 0x00004000,
475 0x00404000, 0x20004010, 0x00000010, 0x20400010,
476 0x20400010, 0x00000000, 0x00404010, 0x20404000,
477 0x00004010, 0x00404000, 0x20404000, 0x20000000,
478 0x20004000, 0x00000010, 0x20400010, 0x00404000,
479 0x20404010, 0x00400000, 0x00004010, 0x20000010,
480 0x00400000, 0x20004000, 0x20000000, 0x00004010,
481 0x20000010, 0x20404010, 0x00404000, 0x20400000,
482 0x00404010, 0x20404000, 0x00000000, 0x20400010,
483 0x00000010, 0x00004000, 0x20400000, 0x00404010,
484 0x00004000, 0x00400010, 0x20004010, 0x00000000,
485 0x20404000, 0x20000000, 0x00400010, 0x20004010
486 };
487
488 static const u32 S7[64] = {
489 0x00200000, 0x04200002, 0x04000802, 0x00000000,
490 0x00000800, 0x04000802, 0x00200802, 0x04200800,
491 0x04200802, 0x00200000, 0x00000000, 0x04000002,
492 0x00000002, 0x04000000, 0x04200002, 0x00000802,
493 0x04000800, 0x00200802, 0x00200002, 0x04000800,
494 0x04000002, 0x04200000, 0x04200800, 0x00200002,
495 0x04200000, 0x00000800, 0x00000802, 0x04200802,
496 0x00200800, 0x00000002, 0x04000000, 0x00200800,
497 0x04000000, 0x00200800, 0x00200000, 0x04000802,
498 0x04000802, 0x04200002, 0x04200002, 0x00000002,
499 0x00200002, 0x04000000, 0x04000800, 0x00200000,
500 0x04200800, 0x00000802, 0x00200802, 0x04200800,
501 0x00000802, 0x04000002, 0x04200802, 0x04200000,
502 0x00200800, 0x00000000, 0x00000002, 0x04200802,
503 0x00000000, 0x00200802, 0x04200000, 0x00000800,
504 0x04000002, 0x04000800, 0x00000800, 0x00200002
505 };
506
507 static const u32 S8[64] = {
508 0x10001040, 0x00001000, 0x00040000, 0x10041040,
509 0x10000000, 0x10001040, 0x00000040, 0x10000000,
510 0x00040040, 0x10040000, 0x10041040, 0x00041000,
511 0x10041000, 0x00041040, 0x00001000, 0x00000040,
512 0x10040000, 0x10000040, 0x10001000, 0x00001040,
513 0x00041000, 0x00040040, 0x10040040, 0x10041000,
514 0x00001040, 0x00000000, 0x00000000, 0x10040040,
515 0x10000040, 0x10001000, 0x00041040, 0x00040000,
516 0x00041040, 0x00040000, 0x10041000, 0x00001000,
517 0x00000040, 0x10040040, 0x00001000, 0x00041040,
518 0x10001000, 0x00000040, 0x10000040, 0x10040000,
519 0x10040040, 0x10000000, 0x00040000, 0x10001040,
520 0x00000000, 0x10041040, 0x00040040, 0x10000040,
521 0x10040000, 0x10001000, 0x10001040, 0x00000000,
522 0x10041040, 0x00041000, 0x00041000, 0x00001040,
523 0x00001040, 0x00040040, 0x10000000, 0x10041000
524 };
525
526 /* Encryption components: IP, FP, and round function */
527
528 #define IP(L, R, T) \
529 ROL(R, 4); \
530 T = L; \
531 L ^= R; \
532 L &= 0xf0f0f0f0; \
533 R ^= L; \
534 L ^= T; \
535 ROL(R, 12); \
536 T = L; \
537 L ^= R; \
538 L &= 0xffff0000; \
539 R ^= L; \
540 L ^= T; \
541 ROR(R, 14); \
542 T = L; \
543 L ^= R; \
544 L &= 0xcccccccc; \
545 R ^= L; \
546 L ^= T; \
547 ROL(R, 6); \
548 T = L; \
549 L ^= R; \
550 L &= 0xff00ff00; \
551 R ^= L; \
552 L ^= T; \
553 ROR(R, 7); \
554 T = L; \
555 L ^= R; \
556 L &= 0xaaaaaaaa; \
557 R ^= L; \
558 L ^= T; \
559 ROL(L, 1);
560
561 #define FP(L, R, T) \
562 ROR(L, 1); \
563 T = L; \
564 L ^= R; \
565 L &= 0xaaaaaaaa; \
566 R ^= L; \
567 L ^= T; \
568 ROL(R, 7); \
569 T = L; \
570 L ^= R; \
571 L &= 0xff00ff00; \
572 R ^= L; \
573 L ^= T; \
574 ROR(R, 6); \
575 T = L; \
576 L ^= R; \
577 L &= 0xcccccccc; \
578 R ^= L; \
579 L ^= T; \
580 ROL(R, 14); \
581 T = L; \
582 L ^= R; \
583 L &= 0xffff0000; \
584 R ^= L; \
585 L ^= T; \
586 ROR(R, 12); \
587 T = L; \
588 L ^= R; \
589 L &= 0xf0f0f0f0; \
590 R ^= L; \
591 L ^= T; \
592 ROR(R, 4);
593
594 #define ROUND(L, R, A, B, K, d) \
595 B = K[0]; A = K[1]; K += d; \
596 B ^= R; A ^= R; \
597 B &= 0x3f3f3f3f; ROR(A, 4); \
598 L ^= S8[0xff & B]; A &= 0x3f3f3f3f; \
599 L ^= S6[0xff & (B >> 8)]; B >>= 16; \
600 L ^= S7[0xff & A]; \
601 L ^= S5[0xff & (A >> 8)]; A >>= 16; \
602 L ^= S4[0xff & B]; \
603 L ^= S2[0xff & (B >> 8)]; \
604 L ^= S3[0xff & A]; \
605 L ^= S1[0xff & (A >> 8)];
606
607 /*
608 * PC2 lookup tables are organized as 2 consecutive sets of 4 interleaved
609 * tables of 128 elements. One set is for C_i and the other for D_i, while
610 * the 4 interleaved tables correspond to four 7-bit subsets of C_i or D_i.
611 *
612 * After PC1 each of the variables a,b,c,d contains a 7 bit subset of C_i
613 * or D_i in bits 7-1 (bit 0 being the least significant).
614 */
615
616 #define T1(x) pt[2 * (x) + 0]
617 #define T2(x) pt[2 * (x) + 1]
618 #define T3(x) pt[2 * (x) + 2]
619 #define T4(x) pt[2 * (x) + 3]
620
621 #define PC2(a, b, c, d) (T4(d) | T3(c) | T2(b) | T1(a))
622
623 /*
624 * Encryption key expansion
625 *
626 * RFC2451: Weak key checks SHOULD be performed.
627 *
628 * FIPS 74:
629 *
630 * Keys having duals are keys which produce all zeros, all ones, or
631 * alternating zero-one patterns in the C and D registers after Permuted
632 * Choice 1 has operated on the key.
633 *
634 */
635 static unsigned long ekey(u32 *pe, const u8 *k)
636 {
637 /* K&R: long is at least 32 bits */
638 unsigned long a, b, c, d, w;
639 const u32 *pt = pc2;
640
641 d = k[4]; d &= 0x0e; d <<= 4; d |= k[0] & 0x1e; d = pc1[d];
642 c = k[5]; c &= 0x0e; c <<= 4; c |= k[1] & 0x1e; c = pc1[c];
643 b = k[6]; b &= 0x0e; b <<= 4; b |= k[2] & 0x1e; b = pc1[b];
644 a = k[7]; a &= 0x0e; a <<= 4; a |= k[3] & 0x1e; a = pc1[a];
645
646 pe[15 * 2 + 0] = PC2(a, b, c, d); d = rs[d];
647 pe[14 * 2 + 0] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
648 pe[13 * 2 + 0] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
649 pe[12 * 2 + 0] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
650 pe[11 * 2 + 0] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
651 pe[10 * 2 + 0] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
652 pe[ 9 * 2 + 0] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
653 pe[ 8 * 2 + 0] = PC2(d, a, b, c); c = rs[c];
654 pe[ 7 * 2 + 0] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
655 pe[ 6 * 2 + 0] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
656 pe[ 5 * 2 + 0] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
657 pe[ 4 * 2 + 0] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
658 pe[ 3 * 2 + 0] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
659 pe[ 2 * 2 + 0] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
660 pe[ 1 * 2 + 0] = PC2(c, d, a, b); b = rs[b];
661 pe[ 0 * 2 + 0] = PC2(b, c, d, a);
662
663 /* Check if first half is weak */
664 w = (a ^ c) | (b ^ d) | (rs[a] ^ c) | (b ^ rs[d]);
665
666 /* Skip to next table set */
667 pt += 512;
668
669 d = k[0]; d &= 0xe0; d >>= 4; d |= k[4] & 0xf0; d = pc1[d + 1];
670 c = k[1]; c &= 0xe0; c >>= 4; c |= k[5] & 0xf0; c = pc1[c + 1];
671 b = k[2]; b &= 0xe0; b >>= 4; b |= k[6] & 0xf0; b = pc1[b + 1];
672 a = k[3]; a &= 0xe0; a >>= 4; a |= k[7] & 0xf0; a = pc1[a + 1];
673
674 /* Check if second half is weak */
675 w |= (a ^ c) | (b ^ d) | (rs[a] ^ c) | (b ^ rs[d]);
676
677 pe[15 * 2 + 1] = PC2(a, b, c, d); d = rs[d];
678 pe[14 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
679 pe[13 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
680 pe[12 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
681 pe[11 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
682 pe[10 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
683 pe[ 9 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
684 pe[ 8 * 2 + 1] = PC2(d, a, b, c); c = rs[c];
685 pe[ 7 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
686 pe[ 6 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
687 pe[ 5 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
688 pe[ 4 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
689 pe[ 3 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
690 pe[ 2 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
691 pe[ 1 * 2 + 1] = PC2(c, d, a, b); b = rs[b];
692 pe[ 0 * 2 + 1] = PC2(b, c, d, a);
693
694 /* Fixup: 2413 5768 -> 1357 2468 */
695 for (d = 0; d < 16; ++d) {
696 a = pe[2 * d];
697 b = pe[2 * d + 1];
698 c = a ^ b;
699 c &= 0xffff0000;
700 a ^= c;
701 b ^= c;
702 ROL(b, 18);
703 pe[2 * d] = a;
704 pe[2 * d + 1] = b;
705 }
706
707 /* Zero if weak key */
708 return w;
709 }
710
711 /*
712 * Decryption key expansion
713 *
714 * No weak key checking is performed, as this is only used by triple DES
715 *
716 */
717 static void dkey(u32 *pe, const u8 *k)
718 {
719 /* K&R: long is at least 32 bits */
720 unsigned long a, b, c, d;
721 const u32 *pt = pc2;
722
723 d = k[4]; d &= 0x0e; d <<= 4; d |= k[0] & 0x1e; d = pc1[d];
724 c = k[5]; c &= 0x0e; c <<= 4; c |= k[1] & 0x1e; c = pc1[c];
725 b = k[6]; b &= 0x0e; b <<= 4; b |= k[2] & 0x1e; b = pc1[b];
726 a = k[7]; a &= 0x0e; a <<= 4; a |= k[3] & 0x1e; a = pc1[a];
727
728 pe[ 0 * 2] = PC2(a, b, c, d); d = rs[d];
729 pe[ 1 * 2] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
730 pe[ 2 * 2] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
731 pe[ 3 * 2] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
732 pe[ 4 * 2] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
733 pe[ 5 * 2] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
734 pe[ 6 * 2] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
735 pe[ 7 * 2] = PC2(d, a, b, c); c = rs[c];
736 pe[ 8 * 2] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
737 pe[ 9 * 2] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
738 pe[10 * 2] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
739 pe[11 * 2] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
740 pe[12 * 2] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
741 pe[13 * 2] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
742 pe[14 * 2] = PC2(c, d, a, b); b = rs[b];
743 pe[15 * 2] = PC2(b, c, d, a);
744
745 /* Skip to next table set */
746 pt += 512;
747
748 d = k[0]; d &= 0xe0; d >>= 4; d |= k[4] & 0xf0; d = pc1[d + 1];
749 c = k[1]; c &= 0xe0; c >>= 4; c |= k[5] & 0xf0; c = pc1[c + 1];
750 b = k[2]; b &= 0xe0; b >>= 4; b |= k[6] & 0xf0; b = pc1[b + 1];
751 a = k[3]; a &= 0xe0; a >>= 4; a |= k[7] & 0xf0; a = pc1[a + 1];
752
753 pe[ 0 * 2 + 1] = PC2(a, b, c, d); d = rs[d];
754 pe[ 1 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
755 pe[ 2 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
756 pe[ 3 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
757 pe[ 4 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
758 pe[ 5 * 2 + 1] = PC2(d, a, b, c); c = rs[c]; b = rs[b];
759 pe[ 6 * 2 + 1] = PC2(b, c, d, a); a = rs[a]; d = rs[d];
760 pe[ 7 * 2 + 1] = PC2(d, a, b, c); c = rs[c];
761 pe[ 8 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
762 pe[ 9 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
763 pe[10 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
764 pe[11 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
765 pe[12 * 2 + 1] = PC2(c, d, a, b); b = rs[b]; a = rs[a];
766 pe[13 * 2 + 1] = PC2(a, b, c, d); d = rs[d]; c = rs[c];
767 pe[14 * 2 + 1] = PC2(c, d, a, b); b = rs[b];
768 pe[15 * 2 + 1] = PC2(b, c, d, a);
769
770 /* Fixup: 2413 5768 -> 1357 2468 */
771 for (d = 0; d < 16; ++d) {
772 a = pe[2 * d];
773 b = pe[2 * d + 1];
774 c = a ^ b;
775 c &= 0xffff0000;
776 a ^= c;
777 b ^= c;
778 ROL(b, 18);
779 pe[2 * d] = a;
780 pe[2 * d + 1] = b;
781 }
782 }
783
784 static int des_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
785 {
786 struct des_ctx *dctx = ctx;
787 u32 tmp[DES_EXPKEY_WORDS];
788 int ret;
789
790 /* Expand to tmp */
791 ret = ekey(tmp, key);
792
793 if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
794 *flags |= CRYPTO_TFM_RES_WEAK_KEY;
795 return -EINVAL;
796 }
797
798 /* Copy to output */
799 memcpy(dctx->expkey, tmp, sizeof(dctx->expkey));
800
801 return 0;
802 }
803
804 static void des_encrypt(void *ctx, u8 *dst, const u8 *src)
805 {
806 const u32 *K = ((struct des_ctx *)ctx)->expkey;
807 const __le32 *s = (const __le32 *)src;
808 __le32 *d = (__le32 *)dst;
809 u32 L, R, A, B;
810 int i;
811
812 L = le32_to_cpu(s[0]);
813 R = le32_to_cpu(s[1]);
814
815 IP(L, R, A);
816 for (i = 0; i < 8; i++) {
817 ROUND(L, R, A, B, K, 2);
818 ROUND(R, L, A, B, K, 2);
819 }
820 FP(R, L, A);
821
822 d[0] = cpu_to_le32(R);
823 d[1] = cpu_to_le32(L);
824 }
825
826 static void des_decrypt(void *ctx, u8 *dst, const u8 *src)
827 {
828 const u32 *K = ((struct des_ctx *)ctx)->expkey + DES_EXPKEY_WORDS - 2;
829 const __le32 *s = (const __le32 *)src;
830 __le32 *d = (__le32 *)dst;
831 u32 L, R, A, B;
832 int i;
833
834 L = le32_to_cpu(s[0]);
835 R = le32_to_cpu(s[1]);
836
837 IP(L, R, A);
838 for (i = 0; i < 8; i++) {
839 ROUND(L, R, A, B, K, -2);
840 ROUND(R, L, A, B, K, -2);
841 }
842 FP(R, L, A);
843
844 d[0] = cpu_to_le32(R);
845 d[1] = cpu_to_le32(L);
846 }
847
848 /*
849 * RFC2451:
850 *
851 * For DES-EDE3, there is no known need to reject weak or
852 * complementation keys. Any weakness is obviated by the use of
853 * multiple keys.
854 *
855 * However, if the first two or last two independent 64-bit keys are
856 * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
857 * same as DES. Implementers MUST reject keys that exhibit this
858 * property.
859 *
860 */
861 static int des3_ede_setkey(void *ctx, const u8 *key,
862 unsigned int keylen, u32 *flags)
863 {
864 const u32 *K = (const u32 *)key;
865 struct des3_ede_ctx *dctx = ctx;
866 u32 *expkey = dctx->expkey;
867
868 if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
869 !((K[2] ^ K[4]) | (K[3] ^ K[5]))))
870 {
871 *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
872 return -EINVAL;
873 }
874
875 ekey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
876 dkey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
877 ekey(expkey, key);
878
879 return 0;
880 }
881
882 static void des3_ede_encrypt(void *ctx, u8 *dst, const u8 *src)
883 {
884 struct des3_ede_ctx *dctx = ctx;
885 const u32 *K = dctx->expkey;
886 const __le32 *s = (const __le32 *)src;
887 __le32 *d = (__le32 *)dst;
888 u32 L, R, A, B;
889 int i;
890
891 L = le32_to_cpu(s[0]);
892 R = le32_to_cpu(s[1]);
893
894 IP(L, R, A);
895 for (i = 0; i < 8; i++) {
896 ROUND(L, R, A, B, K, 2);
897 ROUND(R, L, A, B, K, 2);
898 }
899 for (i = 0; i < 8; i++) {
900 ROUND(R, L, A, B, K, 2);
901 ROUND(L, R, A, B, K, 2);
902 }
903 for (i = 0; i < 8; i++) {
904 ROUND(L, R, A, B, K, 2);
905 ROUND(R, L, A, B, K, 2);
906 }
907 FP(R, L, A);
908
909 d[0] = cpu_to_le32(R);
910 d[1] = cpu_to_le32(L);
911 }
912
913 static void des3_ede_decrypt(void *ctx, u8 *dst, const u8 *src)
914 {
915 struct des3_ede_ctx *dctx = ctx;
916 const u32 *K = dctx->expkey + DES3_EDE_EXPKEY_WORDS - 2;
917 const __le32 *s = (const __le32 *)src;
918 __le32 *d = (__le32 *)dst;
919 u32 L, R, A, B;
920 int i;
921
922 L = le32_to_cpu(s[0]);
923 R = le32_to_cpu(s[1]);
924
925 IP(L, R, A);
926 for (i = 0; i < 8; i++) {
927 ROUND(L, R, A, B, K, -2);
928 ROUND(R, L, A, B, K, -2);
929 }
930 for (i = 0; i < 8; i++) {
931 ROUND(R, L, A, B, K, -2);
932 ROUND(L, R, A, B, K, -2);
933 }
934 for (i = 0; i < 8; i++) {
935 ROUND(L, R, A, B, K, -2);
936 ROUND(R, L, A, B, K, -2);
937 }
938 FP(R, L, A);
939
940 d[0] = cpu_to_le32(R);
941 d[1] = cpu_to_le32(L);
942 }
943
944 static struct crypto_alg des_alg = {
945 .cra_name = "des",
946 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
947 .cra_blocksize = DES_BLOCK_SIZE,
948 .cra_ctxsize = sizeof(struct des_ctx),
949 .cra_module = THIS_MODULE,
950 .cra_list = LIST_HEAD_INIT(des_alg.cra_list),
951 .cra_u = { .cipher = {
952 .cia_min_keysize = DES_KEY_SIZE,
953 .cia_max_keysize = DES_KEY_SIZE,
954 .cia_setkey = des_setkey,
955 .cia_encrypt = des_encrypt,
956 .cia_decrypt = des_decrypt } }
957 };
958
959 static struct crypto_alg des3_ede_alg = {
960 .cra_name = "des3_ede",
961 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
962 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
963 .cra_ctxsize = sizeof(struct des3_ede_ctx),
964 .cra_module = THIS_MODULE,
965 .cra_list = LIST_HEAD_INIT(des3_ede_alg.cra_list),
966 .cra_u = { .cipher = {
967 .cia_min_keysize = DES3_EDE_KEY_SIZE,
968 .cia_max_keysize = DES3_EDE_KEY_SIZE,
969 .cia_setkey = des3_ede_setkey,
970 .cia_encrypt = des3_ede_encrypt,
971 .cia_decrypt = des3_ede_decrypt } }
972 };
973
974 MODULE_ALIAS("des3_ede");
975
976 static int __init init(void)
977 {
978 int ret = 0;
979
980 ret = crypto_register_alg(&des_alg);
981 if (ret < 0)
982 goto out;
983
984 ret = crypto_register_alg(&des3_ede_alg);
985 if (ret < 0)
986 crypto_unregister_alg(&des_alg);
987 out:
988 return ret;
989 }
990
991 static void __exit fini(void)
992 {
993 crypto_unregister_alg(&des3_ede_alg);
994 crypto_unregister_alg(&des_alg);
995 }
996
997 module_init(init);
998 module_exit(fini);
999
1000 MODULE_LICENSE("GPL");
1001 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");
1002 MODULE_AUTHOR("Dag Arne Osvik <da@osvik.no>");
Support for the Chinese Samsung S3C2440 based development boards