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2fe58dfd SE |
1 | /* |
2 | * This file is | |
3 | * Copyright (C) 1998 Ross Anderson, Eli Biham, Lars Knudsen | |
4 | * | |
5 | * For more information see http://www.cl.cam.ac.uk/users/rja14/serpent.html | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software Foundation, | |
19 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | * | |
21 | */ | |
22 | ||
23 | #include "secnet.h" | |
24 | ||
25 | #include "serpent.h" | |
26 | #include "serpentsboxes.h" | |
27 | ||
28 | void serpent_makekey(struct keyInstance *key, int keyLen, | |
29 | uint8_t *keyMaterial) | |
30 | { | |
1caa23ff IJ |
31 | int i; |
32 | uint32_t j; | |
2fe58dfd SE |
33 | uint32_t w[132],k[132]; |
34 | ||
35 | for(i=0; i<keyLen/32; i++) | |
3b83c932 | 36 | w[i]=GET_32BIT_MSB_FIRST(keyMaterial + (keyLen/8 - i*4) - 4); |
2fe58dfd | 37 | if(keyLen<256) |
3b83c932 SE |
38 | w[i]=(GET_32BIT_MSB_FIRST(keyMaterial + (keyLen/8 - i*4) - 4) |
39 | & ((1L<<((keyLen&31)))-1)) | (1L<<((keyLen&31))); | |
2fe58dfd SE |
40 | for(i++; i<8; i++) |
41 | w[i]=0; | |
42 | for(i=8; i<16; i++) | |
43 | w[i]=ROL(w[i-8]^w[i-5]^w[i-3]^w[i-1]^PHI^(i-8),11); | |
44 | for(i=0; i<8; i++) | |
45 | w[i]=w[i+8]; | |
46 | for(i=8; i<132; i++) | |
47 | w[i]=ROL(w[i-8]^w[i-5]^w[i-3]^w[i-1]^PHI^i,11); | |
48 | ||
49 | RND03(w[ 0], w[ 1], w[ 2], w[ 3], k[ 0], k[ 1], k[ 2], k[ 3]); | |
50 | RND02(w[ 4], w[ 5], w[ 6], w[ 7], k[ 4], k[ 5], k[ 6], k[ 7]); | |
51 | RND01(w[ 8], w[ 9], w[ 10], w[ 11], k[ 8], k[ 9], k[ 10], k[ 11]); | |
52 | RND00(w[ 12], w[ 13], w[ 14], w[ 15], k[ 12], k[ 13], k[ 14], k[ 15]); | |
53 | RND31(w[ 16], w[ 17], w[ 18], w[ 19], k[ 16], k[ 17], k[ 18], k[ 19]); | |
54 | RND30(w[ 20], w[ 21], w[ 22], w[ 23], k[ 20], k[ 21], k[ 22], k[ 23]); | |
55 | RND29(w[ 24], w[ 25], w[ 26], w[ 27], k[ 24], k[ 25], k[ 26], k[ 27]); | |
56 | RND28(w[ 28], w[ 29], w[ 30], w[ 31], k[ 28], k[ 29], k[ 30], k[ 31]); | |
57 | RND27(w[ 32], w[ 33], w[ 34], w[ 35], k[ 32], k[ 33], k[ 34], k[ 35]); | |
58 | RND26(w[ 36], w[ 37], w[ 38], w[ 39], k[ 36], k[ 37], k[ 38], k[ 39]); | |
59 | RND25(w[ 40], w[ 41], w[ 42], w[ 43], k[ 40], k[ 41], k[ 42], k[ 43]); | |
60 | RND24(w[ 44], w[ 45], w[ 46], w[ 47], k[ 44], k[ 45], k[ 46], k[ 47]); | |
61 | RND23(w[ 48], w[ 49], w[ 50], w[ 51], k[ 48], k[ 49], k[ 50], k[ 51]); | |
62 | RND22(w[ 52], w[ 53], w[ 54], w[ 55], k[ 52], k[ 53], k[ 54], k[ 55]); | |
63 | RND21(w[ 56], w[ 57], w[ 58], w[ 59], k[ 56], k[ 57], k[ 58], k[ 59]); | |
64 | RND20(w[ 60], w[ 61], w[ 62], w[ 63], k[ 60], k[ 61], k[ 62], k[ 63]); | |
65 | RND19(w[ 64], w[ 65], w[ 66], w[ 67], k[ 64], k[ 65], k[ 66], k[ 67]); | |
66 | RND18(w[ 68], w[ 69], w[ 70], w[ 71], k[ 68], k[ 69], k[ 70], k[ 71]); | |
67 | RND17(w[ 72], w[ 73], w[ 74], w[ 75], k[ 72], k[ 73], k[ 74], k[ 75]); | |
68 | RND16(w[ 76], w[ 77], w[ 78], w[ 79], k[ 76], k[ 77], k[ 78], k[ 79]); | |
69 | RND15(w[ 80], w[ 81], w[ 82], w[ 83], k[ 80], k[ 81], k[ 82], k[ 83]); | |
70 | RND14(w[ 84], w[ 85], w[ 86], w[ 87], k[ 84], k[ 85], k[ 86], k[ 87]); | |
71 | RND13(w[ 88], w[ 89], w[ 90], w[ 91], k[ 88], k[ 89], k[ 90], k[ 91]); | |
72 | RND12(w[ 92], w[ 93], w[ 94], w[ 95], k[ 92], k[ 93], k[ 94], k[ 95]); | |
73 | RND11(w[ 96], w[ 97], w[ 98], w[ 99], k[ 96], k[ 97], k[ 98], k[ 99]); | |
74 | RND10(w[100], w[101], w[102], w[103], k[100], k[101], k[102], k[103]); | |
75 | RND09(w[104], w[105], w[106], w[107], k[104], k[105], k[106], k[107]); | |
76 | RND08(w[108], w[109], w[110], w[111], k[108], k[109], k[110], k[111]); | |
77 | RND07(w[112], w[113], w[114], w[115], k[112], k[113], k[114], k[115]); | |
78 | RND06(w[116], w[117], w[118], w[119], k[116], k[117], k[118], k[119]); | |
79 | RND05(w[120], w[121], w[122], w[123], k[120], k[121], k[122], k[123]); | |
80 | RND04(w[124], w[125], w[126], w[127], k[124], k[125], k[126], k[127]); | |
81 | RND03(w[128], w[129], w[130], w[131], k[128], k[129], k[130], k[131]); | |
82 | ||
83 | for(i=0; i<=32; i++) | |
84 | for(j=0; j<4; j++) | |
85 | key->subkeys[i][j] = k[4*i+j]; | |
86 | } | |
87 | ||
88 | void serpent_encrypt(struct keyInstance *key, | |
3b83c932 SE |
89 | uint8_t plaintext[16], |
90 | uint8_t ciphertext[16]) | |
2fe58dfd SE |
91 | { |
92 | register uint32_t x0, x1, x2, x3; | |
93 | register uint32_t y0, y1, y2, y3; | |
94 | ||
3b83c932 SE |
95 | x0=GET_32BIT_MSB_FIRST(plaintext+12); |
96 | x1=GET_32BIT_MSB_FIRST(plaintext+8); | |
97 | x2=GET_32BIT_MSB_FIRST(plaintext+4); | |
98 | x3=GET_32BIT_MSB_FIRST(plaintext); | |
2fe58dfd SE |
99 | |
100 | /* Start to encrypt the plaintext x */ | |
101 | keying(x0, x1, x2, x3, key->subkeys[ 0]); | |
102 | RND00(x0, x1, x2, x3, y0, y1, y2, y3); | |
103 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
104 | keying(x0, x1, x2, x3, key->subkeys[ 1]); | |
105 | RND01(x0, x1, x2, x3, y0, y1, y2, y3); | |
106 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
107 | keying(x0, x1, x2, x3, key->subkeys[ 2]); | |
108 | RND02(x0, x1, x2, x3, y0, y1, y2, y3); | |
109 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
110 | keying(x0, x1, x2, x3, key->subkeys[ 3]); | |
111 | RND03(x0, x1, x2, x3, y0, y1, y2, y3); | |
112 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
113 | keying(x0, x1, x2, x3, key->subkeys[ 4]); | |
114 | RND04(x0, x1, x2, x3, y0, y1, y2, y3); | |
115 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
116 | keying(x0, x1, x2, x3, key->subkeys[ 5]); | |
117 | RND05(x0, x1, x2, x3, y0, y1, y2, y3); | |
118 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
119 | keying(x0, x1, x2, x3, key->subkeys[ 6]); | |
120 | RND06(x0, x1, x2, x3, y0, y1, y2, y3); | |
121 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
122 | keying(x0, x1, x2, x3, key->subkeys[ 7]); | |
123 | RND07(x0, x1, x2, x3, y0, y1, y2, y3); | |
124 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
125 | keying(x0, x1, x2, x3, key->subkeys[ 8]); | |
126 | RND08(x0, x1, x2, x3, y0, y1, y2, y3); | |
127 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
128 | keying(x0, x1, x2, x3, key->subkeys[ 9]); | |
129 | RND09(x0, x1, x2, x3, y0, y1, y2, y3); | |
130 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
131 | keying(x0, x1, x2, x3, key->subkeys[10]); | |
132 | RND10(x0, x1, x2, x3, y0, y1, y2, y3); | |
133 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
134 | keying(x0, x1, x2, x3, key->subkeys[11]); | |
135 | RND11(x0, x1, x2, x3, y0, y1, y2, y3); | |
136 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
137 | keying(x0, x1, x2, x3, key->subkeys[12]); | |
138 | RND12(x0, x1, x2, x3, y0, y1, y2, y3); | |
139 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
140 | keying(x0, x1, x2, x3, key->subkeys[13]); | |
141 | RND13(x0, x1, x2, x3, y0, y1, y2, y3); | |
142 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
143 | keying(x0, x1, x2, x3, key->subkeys[14]); | |
144 | RND14(x0, x1, x2, x3, y0, y1, y2, y3); | |
145 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
146 | keying(x0, x1, x2, x3, key->subkeys[15]); | |
147 | RND15(x0, x1, x2, x3, y0, y1, y2, y3); | |
148 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
149 | keying(x0, x1, x2, x3, key->subkeys[16]); | |
150 | RND16(x0, x1, x2, x3, y0, y1, y2, y3); | |
151 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
152 | keying(x0, x1, x2, x3, key->subkeys[17]); | |
153 | RND17(x0, x1, x2, x3, y0, y1, y2, y3); | |
154 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
155 | keying(x0, x1, x2, x3, key->subkeys[18]); | |
156 | RND18(x0, x1, x2, x3, y0, y1, y2, y3); | |
157 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
158 | keying(x0, x1, x2, x3, key->subkeys[19]); | |
159 | RND19(x0, x1, x2, x3, y0, y1, y2, y3); | |
160 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
161 | keying(x0, x1, x2, x3, key->subkeys[20]); | |
162 | RND20(x0, x1, x2, x3, y0, y1, y2, y3); | |
163 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
164 | keying(x0, x1, x2, x3, key->subkeys[21]); | |
165 | RND21(x0, x1, x2, x3, y0, y1, y2, y3); | |
166 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
167 | keying(x0, x1, x2, x3, key->subkeys[22]); | |
168 | RND22(x0, x1, x2, x3, y0, y1, y2, y3); | |
169 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
170 | keying(x0, x1, x2, x3, key->subkeys[23]); | |
171 | RND23(x0, x1, x2, x3, y0, y1, y2, y3); | |
172 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
173 | keying(x0, x1, x2, x3, key->subkeys[24]); | |
174 | RND24(x0, x1, x2, x3, y0, y1, y2, y3); | |
175 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
176 | keying(x0, x1, x2, x3, key->subkeys[25]); | |
177 | RND25(x0, x1, x2, x3, y0, y1, y2, y3); | |
178 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
179 | keying(x0, x1, x2, x3, key->subkeys[26]); | |
180 | RND26(x0, x1, x2, x3, y0, y1, y2, y3); | |
181 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
182 | keying(x0, x1, x2, x3, key->subkeys[27]); | |
183 | RND27(x0, x1, x2, x3, y0, y1, y2, y3); | |
184 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
185 | keying(x0, x1, x2, x3, key->subkeys[28]); | |
186 | RND28(x0, x1, x2, x3, y0, y1, y2, y3); | |
187 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
188 | keying(x0, x1, x2, x3, key->subkeys[29]); | |
189 | RND29(x0, x1, x2, x3, y0, y1, y2, y3); | |
190 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
191 | keying(x0, x1, x2, x3, key->subkeys[30]); | |
192 | RND30(x0, x1, x2, x3, y0, y1, y2, y3); | |
193 | transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
194 | keying(x0, x1, x2, x3, key->subkeys[31]); | |
195 | RND31(x0, x1, x2, x3, y0, y1, y2, y3); | |
196 | x0 = y0; x1 = y1; x2 = y2; x3 = y3; | |
197 | keying(x0, x1, x2, x3, key->subkeys[32]); | |
198 | /* The ciphertext is now in x */ | |
199 | ||
3b83c932 SE |
200 | PUT_32BIT_MSB_FIRST(ciphertext+12, x0); |
201 | PUT_32BIT_MSB_FIRST(ciphertext+8, x1); | |
202 | PUT_32BIT_MSB_FIRST(ciphertext+4, x2); | |
203 | PUT_32BIT_MSB_FIRST(ciphertext, x3); | |
2fe58dfd SE |
204 | } |
205 | ||
206 | void serpent_decrypt(struct keyInstance *key, | |
3b83c932 SE |
207 | uint8_t ciphertext[16], |
208 | uint8_t plaintext[16]) | |
2fe58dfd SE |
209 | { |
210 | register uint32_t x0, x1, x2, x3; | |
211 | register uint32_t y0, y1, y2, y3; | |
212 | ||
3b83c932 SE |
213 | x0=GET_32BIT_MSB_FIRST(ciphertext+12); |
214 | x1=GET_32BIT_MSB_FIRST(ciphertext+8); | |
215 | x2=GET_32BIT_MSB_FIRST(ciphertext+4); | |
216 | x3=GET_32BIT_MSB_FIRST(ciphertext); | |
2fe58dfd SE |
217 | |
218 | /* Start to decrypt the ciphertext x */ | |
219 | keying(x0, x1, x2, x3, key->subkeys[32]); | |
220 | InvRND31(x0, x1, x2, x3, y0, y1, y2, y3); | |
221 | keying(y0, y1, y2, y3, key->subkeys[31]); | |
222 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
223 | InvRND30(x0, x1, x2, x3, y0, y1, y2, y3); | |
224 | keying(y0, y1, y2, y3, key->subkeys[30]); | |
225 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
226 | InvRND29(x0, x1, x2, x3, y0, y1, y2, y3); | |
227 | keying(y0, y1, y2, y3, key->subkeys[29]); | |
228 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
229 | InvRND28(x0, x1, x2, x3, y0, y1, y2, y3); | |
230 | keying(y0, y1, y2, y3, key->subkeys[28]); | |
231 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
232 | InvRND27(x0, x1, x2, x3, y0, y1, y2, y3); | |
233 | keying(y0, y1, y2, y3, key->subkeys[27]); | |
234 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
235 | InvRND26(x0, x1, x2, x3, y0, y1, y2, y3); | |
236 | keying(y0, y1, y2, y3, key->subkeys[26]); | |
237 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
238 | InvRND25(x0, x1, x2, x3, y0, y1, y2, y3); | |
239 | keying(y0, y1, y2, y3, key->subkeys[25]); | |
240 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
241 | InvRND24(x0, x1, x2, x3, y0, y1, y2, y3); | |
242 | keying(y0, y1, y2, y3, key->subkeys[24]); | |
243 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
244 | InvRND23(x0, x1, x2, x3, y0, y1, y2, y3); | |
245 | keying(y0, y1, y2, y3, key->subkeys[23]); | |
246 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
247 | InvRND22(x0, x1, x2, x3, y0, y1, y2, y3); | |
248 | keying(y0, y1, y2, y3, key->subkeys[22]); | |
249 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
250 | InvRND21(x0, x1, x2, x3, y0, y1, y2, y3); | |
251 | keying(y0, y1, y2, y3, key->subkeys[21]); | |
252 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
253 | InvRND20(x0, x1, x2, x3, y0, y1, y2, y3); | |
254 | keying(y0, y1, y2, y3, key->subkeys[20]); | |
255 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
256 | InvRND19(x0, x1, x2, x3, y0, y1, y2, y3); | |
257 | keying(y0, y1, y2, y3, key->subkeys[19]); | |
258 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
259 | InvRND18(x0, x1, x2, x3, y0, y1, y2, y3); | |
260 | keying(y0, y1, y2, y3, key->subkeys[18]); | |
261 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
262 | InvRND17(x0, x1, x2, x3, y0, y1, y2, y3); | |
263 | keying(y0, y1, y2, y3, key->subkeys[17]); | |
264 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
265 | InvRND16(x0, x1, x2, x3, y0, y1, y2, y3); | |
266 | keying(y0, y1, y2, y3, key->subkeys[16]); | |
267 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
268 | InvRND15(x0, x1, x2, x3, y0, y1, y2, y3); | |
269 | keying(y0, y1, y2, y3, key->subkeys[15]); | |
270 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
271 | InvRND14(x0, x1, x2, x3, y0, y1, y2, y3); | |
272 | keying(y0, y1, y2, y3, key->subkeys[14]); | |
273 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
274 | InvRND13(x0, x1, x2, x3, y0, y1, y2, y3); | |
275 | keying(y0, y1, y2, y3, key->subkeys[13]); | |
276 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
277 | InvRND12(x0, x1, x2, x3, y0, y1, y2, y3); | |
278 | keying(y0, y1, y2, y3, key->subkeys[12]); | |
279 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
280 | InvRND11(x0, x1, x2, x3, y0, y1, y2, y3); | |
281 | keying(y0, y1, y2, y3, key->subkeys[11]); | |
282 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
283 | InvRND10(x0, x1, x2, x3, y0, y1, y2, y3); | |
284 | keying(y0, y1, y2, y3, key->subkeys[10]); | |
285 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
286 | InvRND09(x0, x1, x2, x3, y0, y1, y2, y3); | |
287 | keying(y0, y1, y2, y3, key->subkeys[ 9]); | |
288 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
289 | InvRND08(x0, x1, x2, x3, y0, y1, y2, y3); | |
290 | keying(y0, y1, y2, y3, key->subkeys[ 8]); | |
291 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
292 | InvRND07(x0, x1, x2, x3, y0, y1, y2, y3); | |
293 | keying(y0, y1, y2, y3, key->subkeys[ 7]); | |
294 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
295 | InvRND06(x0, x1, x2, x3, y0, y1, y2, y3); | |
296 | keying(y0, y1, y2, y3, key->subkeys[ 6]); | |
297 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
298 | InvRND05(x0, x1, x2, x3, y0, y1, y2, y3); | |
299 | keying(y0, y1, y2, y3, key->subkeys[ 5]); | |
300 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
301 | InvRND04(x0, x1, x2, x3, y0, y1, y2, y3); | |
302 | keying(y0, y1, y2, y3, key->subkeys[ 4]); | |
303 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
304 | InvRND03(x0, x1, x2, x3, y0, y1, y2, y3); | |
305 | keying(y0, y1, y2, y3, key->subkeys[ 3]); | |
306 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
307 | InvRND02(x0, x1, x2, x3, y0, y1, y2, y3); | |
308 | keying(y0, y1, y2, y3, key->subkeys[ 2]); | |
309 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
310 | InvRND01(x0, x1, x2, x3, y0, y1, y2, y3); | |
311 | keying(y0, y1, y2, y3, key->subkeys[ 1]); | |
312 | inv_transform(y0, y1, y2, y3, x0, x1, x2, x3); | |
313 | InvRND00(x0, x1, x2, x3, y0, y1, y2, y3); | |
314 | x0 = y0; x1 = y1; x2 = y2; x3 = y3; | |
315 | keying(x0, x1, x2, x3, key->subkeys[ 0]); | |
316 | /* The plaintext is now in x */ | |
317 | ||
3b83c932 SE |
318 | PUT_32BIT_MSB_FIRST(plaintext+12, x0); |
319 | PUT_32BIT_MSB_FIRST(plaintext+8, x1); | |
320 | PUT_32BIT_MSB_FIRST(plaintext+4, x2); | |
321 | PUT_32BIT_MSB_FIRST(plaintext, x3); | |
2fe58dfd | 322 | } |