]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - crypto/serpent_generic.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Serpent Cipher Algorithm.
7 * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/errno.h>
13 #include <asm/unaligned.h>
14 #include <linux/crypto.h>
15 #include <linux/types.h>
16 #include <crypto/serpent.h>
18 /* Key is padded to the maximum of 256 bits before round key generation.
19 * Any key length <= 256 bits (32 bytes) is allowed by the algorithm.
22 #define PHI 0x9e3779b9UL
24 #define keyiter(a, b, c, d, i, j) \
25 ({ b ^= d; b ^= c; b ^= a; b ^= PHI ^ i; b = rol32(b, 11); k[j] = b; })
27 #define loadkeys(x0, x1, x2, x3, i) \
28 ({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
30 #define storekeys(x0, x1, x2, x3, i) \
31 ({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
33 #define store_and_load_keys(x0, x1, x2, x3, s, l) \
34 ({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); })
36 #define K(x0, x1, x2, x3, i) ({ \
37 x3 ^= k[4*(i)+3]; x2 ^= k[4*(i)+2]; \
38 x1 ^= k[4*(i)+1]; x0 ^= k[4*(i)+0]; \
41 #define LK(x0, x1, x2, x3, x4, i) ({ \
43 x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \
45 x1 = rol32(x1, 1); x3 ^= x4; \
46 x3 = rol32(x3, 7); x4 = x1; \
47 x0 ^= x1; x4 <<= 7; x2 ^= x3; \
48 x0 ^= x3; x2 ^= x4; x3 ^= k[4*i+3]; \
49 x1 ^= k[4*i+1]; x0 = rol32(x0, 5); x2 = rol32(x2, 22);\
50 x0 ^= k[4*i+0]; x2 ^= k[4*i+2]; \
53 #define KL(x0, x1, x2, x3, x4, i) ({ \
54 x0 ^= k[4*i+0]; x1 ^= k[4*i+1]; x2 ^= k[4*i+2]; \
55 x3 ^= k[4*i+3]; x0 = ror32(x0, 5); x2 = ror32(x2, 22);\
56 x4 = x1; x2 ^= x3; x0 ^= x3; \
57 x4 <<= 7; x0 ^= x1; x1 = ror32(x1, 1); \
58 x2 ^= x4; x3 = ror32(x3, 7); x4 = x0 << 3; \
59 x1 ^= x0; x3 ^= x4; x0 = ror32(x0, 13);\
60 x1 ^= x2; x3 ^= x2; x2 = ror32(x2, 3); \
63 #define S0(x0, x1, x2, x3, x4) ({ \
65 x3 |= x0; x0 ^= x4; x4 ^= x2; \
66 x4 = ~x4; x3 ^= x1; x1 &= x0; \
67 x1 ^= x4; x2 ^= x0; x0 ^= x3; \
68 x4 |= x0; x0 ^= x2; x2 &= x1; \
69 x3 ^= x2; x1 = ~x1; x2 ^= x4; \
73 #define S1(x0, x1, x2, x3, x4) ({ \
75 x1 ^= x0; x0 ^= x3; x3 = ~x3; \
76 x4 &= x1; x0 |= x1; x3 ^= x2; \
77 x0 ^= x3; x1 ^= x3; x3 ^= x4; \
78 x1 |= x4; x4 ^= x2; x2 &= x0; \
79 x2 ^= x1; x1 |= x0; x0 = ~x0; \
83 #define S2(x0, x1, x2, x3, x4) ({ \
85 x1 ^= x0; x4 = x0; x0 &= x2; \
86 x0 ^= x3; x3 |= x4; x2 ^= x1; \
87 x3 ^= x1; x1 &= x0; x0 ^= x2; \
88 x2 &= x3; x3 |= x1; x0 = ~x0; \
89 x3 ^= x0; x4 ^= x0; x0 ^= x2; \
93 #define S3(x0, x1, x2, x3, x4) ({ \
95 x1 ^= x3; x3 |= x0; x4 &= x0; \
96 x0 ^= x2; x2 ^= x1; x1 &= x3; \
97 x2 ^= x3; x0 |= x4; x4 ^= x3; \
98 x1 ^= x0; x0 &= x3; x3 &= x4; \
99 x3 ^= x2; x4 |= x1; x2 &= x1; \
100 x4 ^= x3; x0 ^= x3; x3 ^= x2; \
103 #define S4(x0, x1, x2, x3, x4) ({ \
105 x3 &= x0; x0 ^= x4; \
106 x3 ^= x2; x2 |= x4; x0 ^= x1; \
107 x4 ^= x3; x2 |= x0; \
108 x2 ^= x1; x1 &= x0; \
109 x1 ^= x4; x4 &= x2; x2 ^= x3; \
110 x4 ^= x0; x3 |= x1; x1 = ~x1; \
114 #define S5(x0, x1, x2, x3, x4) ({ \
116 x2 ^= x1; x3 = ~x3; x4 ^= x0; \
117 x0 ^= x2; x1 &= x4; x4 |= x3; \
118 x4 ^= x0; x0 &= x3; x1 ^= x3; \
119 x3 ^= x2; x0 ^= x1; x2 &= x4; \
120 x1 ^= x2; x2 &= x0; \
124 #define S6(x0, x1, x2, x3, x4) ({ \
126 x3 ^= x0; x1 ^= x2; x2 ^= x0; \
127 x0 &= x3; x1 |= x3; x4 = ~x4; \
128 x0 ^= x1; x1 ^= x2; \
129 x3 ^= x4; x4 ^= x0; x2 &= x0; \
130 x4 ^= x1; x2 ^= x3; x3 &= x1; \
131 x3 ^= x0; x1 ^= x2; \
134 #define S7(x0, x1, x2, x3, x4) ({ \
136 x4 = x1; x0 = ~x0; x1 &= x2; \
137 x1 ^= x3; x3 |= x4; x4 ^= x2; \
138 x2 ^= x3; x3 ^= x0; x0 |= x1; \
139 x2 &= x0; x0 ^= x4; x4 ^= x3; \
140 x3 &= x0; x4 ^= x1; \
141 x2 ^= x4; x3 ^= x1; x4 |= x0; \
145 #define SI0(x0, x1, x2, x3, x4) ({ \
147 x3 |= x1; x4 ^= x1; x0 = ~x0; \
148 x2 ^= x3; x3 ^= x0; x0 &= x1; \
149 x0 ^= x2; x2 &= x3; x3 ^= x4; \
150 x2 ^= x3; x1 ^= x3; x3 &= x0; \
151 x1 ^= x0; x0 ^= x2; x4 ^= x3; \
154 #define SI1(x0, x1, x2, x3, x4) ({ \
156 x0 ^= x2; x2 = ~x2; x4 |= x1; \
157 x4 ^= x3; x3 &= x1; x1 ^= x2; \
158 x2 &= x4; x4 ^= x1; x1 |= x3; \
159 x3 ^= x0; x2 ^= x0; x0 |= x4; \
160 x2 ^= x4; x1 ^= x0; \
164 #define SI2(x0, x1, x2, x3, x4) ({ \
165 x2 ^= x1; x4 = x3; x3 = ~x3; \
166 x3 |= x2; x2 ^= x4; x4 ^= x0; \
167 x3 ^= x1; x1 |= x2; x2 ^= x0; \
168 x1 ^= x4; x4 |= x3; x2 ^= x3; \
169 x4 ^= x2; x2 &= x1; \
170 x2 ^= x3; x3 ^= x4; x4 ^= x0; \
173 #define SI3(x0, x1, x2, x3, x4) ({ \
176 x1 ^= x0; x0 |= x4; x4 ^= x3; \
177 x0 ^= x3; x3 |= x1; x1 ^= x2; \
178 x1 ^= x3; x0 ^= x2; x2 ^= x3; \
179 x3 &= x1; x1 ^= x0; x0 &= x2; \
180 x4 ^= x3; x3 ^= x0; x0 ^= x1; \
183 #define SI4(x0, x1, x2, x3, x4) ({ \
184 x2 ^= x3; x4 = x0; x0 &= x1; \
185 x0 ^= x2; x2 |= x3; x4 = ~x4; \
186 x1 ^= x0; x0 ^= x2; x2 &= x4; \
187 x2 ^= x0; x0 |= x4; \
188 x0 ^= x3; x3 &= x2; \
189 x4 ^= x3; x3 ^= x1; x1 &= x0; \
190 x4 ^= x1; x0 ^= x3; \
193 #define SI5(x0, x1, x2, x3, x4) ({ \
195 x2 ^= x4; x1 ^= x3; x3 &= x4; \
196 x2 ^= x3; x3 |= x0; x0 = ~x0; \
197 x3 ^= x2; x2 |= x0; x4 ^= x1; \
198 x2 ^= x4; x4 &= x0; x0 ^= x1; \
199 x1 ^= x3; x0 &= x2; x2 ^= x3; \
200 x0 ^= x2; x2 ^= x4; x4 ^= x3; \
203 #define SI6(x0, x1, x2, x3, x4) ({ \
205 x4 = x0; x0 &= x3; x2 ^= x3; \
206 x0 ^= x2; x3 ^= x1; x2 |= x4; \
207 x2 ^= x3; x3 &= x0; x0 = ~x0; \
208 x3 ^= x1; x1 &= x2; x4 ^= x0; \
209 x3 ^= x4; x4 ^= x2; x0 ^= x1; \
213 #define SI7(x0, x1, x2, x3, x4) ({ \
214 x4 = x3; x3 &= x0; x0 ^= x2; \
215 x2 |= x4; x4 ^= x1; x0 = ~x0; \
216 x1 |= x3; x4 ^= x0; x0 &= x2; \
217 x0 ^= x1; x1 &= x2; x3 ^= x2; \
218 x4 ^= x3; x2 &= x3; x3 |= x0; \
219 x1 ^= x4; x3 ^= x4; x4 &= x0; \
224 * both gcc and clang have misoptimized this function in the past,
225 * producing horrible object code from spilling temporary variables
226 * on the stack. Forcing this part out of line avoids that.
228 static noinline
void __serpent_setkey_sbox(u32 r0
, u32 r1
, u32 r2
,
229 u32 r3
, u32 r4
, u32
*k
)
232 S3(r3
, r4
, r0
, r1
, r2
); store_and_load_keys(r1
, r2
, r4
, r3
, 28, 24);
233 S4(r1
, r2
, r4
, r3
, r0
); store_and_load_keys(r2
, r4
, r3
, r0
, 24, 20);
234 S5(r2
, r4
, r3
, r0
, r1
); store_and_load_keys(r1
, r2
, r4
, r0
, 20, 16);
235 S6(r1
, r2
, r4
, r0
, r3
); store_and_load_keys(r4
, r3
, r2
, r0
, 16, 12);
236 S7(r4
, r3
, r2
, r0
, r1
); store_and_load_keys(r1
, r2
, r0
, r4
, 12, 8);
237 S0(r1
, r2
, r0
, r4
, r3
); store_and_load_keys(r0
, r2
, r4
, r1
, 8, 4);
238 S1(r0
, r2
, r4
, r1
, r3
); store_and_load_keys(r3
, r4
, r1
, r0
, 4, 0);
239 S2(r3
, r4
, r1
, r0
, r2
); store_and_load_keys(r2
, r4
, r3
, r0
, 0, -4);
240 S3(r2
, r4
, r3
, r0
, r1
); store_and_load_keys(r0
, r1
, r4
, r2
, -4, -8);
241 S4(r0
, r1
, r4
, r2
, r3
); store_and_load_keys(r1
, r4
, r2
, r3
, -8, -12);
242 S5(r1
, r4
, r2
, r3
, r0
); store_and_load_keys(r0
, r1
, r4
, r3
, -12, -16);
243 S6(r0
, r1
, r4
, r3
, r2
); store_and_load_keys(r4
, r2
, r1
, r3
, -16, -20);
244 S7(r4
, r2
, r1
, r3
, r0
); store_and_load_keys(r0
, r1
, r3
, r4
, -20, -24);
245 S0(r0
, r1
, r3
, r4
, r2
); store_and_load_keys(r3
, r1
, r4
, r0
, -24, -28);
247 S1(r3
, r1
, r4
, r0
, r2
); store_and_load_keys(r2
, r4
, r0
, r3
, 22, 18);
248 S2(r2
, r4
, r0
, r3
, r1
); store_and_load_keys(r1
, r4
, r2
, r3
, 18, 14);
249 S3(r1
, r4
, r2
, r3
, r0
); store_and_load_keys(r3
, r0
, r4
, r1
, 14, 10);
250 S4(r3
, r0
, r4
, r1
, r2
); store_and_load_keys(r0
, r4
, r1
, r2
, 10, 6);
251 S5(r0
, r4
, r1
, r2
, r3
); store_and_load_keys(r3
, r0
, r4
, r2
, 6, 2);
252 S6(r3
, r0
, r4
, r2
, r1
); store_and_load_keys(r4
, r1
, r0
, r2
, 2, -2);
253 S7(r4
, r1
, r0
, r2
, r3
); store_and_load_keys(r3
, r0
, r2
, r4
, -2, -6);
254 S0(r3
, r0
, r2
, r4
, r1
); store_and_load_keys(r2
, r0
, r4
, r3
, -6, -10);
255 S1(r2
, r0
, r4
, r3
, r1
); store_and_load_keys(r1
, r4
, r3
, r2
, -10, -14);
256 S2(r1
, r4
, r3
, r2
, r0
); store_and_load_keys(r0
, r4
, r1
, r2
, -14, -18);
257 S3(r0
, r4
, r1
, r2
, r3
); store_and_load_keys(r2
, r3
, r4
, r0
, -18, -22);
259 S4(r2
, r3
, r4
, r0
, r1
); store_and_load_keys(r3
, r4
, r0
, r1
, 28, 24);
260 S5(r3
, r4
, r0
, r1
, r2
); store_and_load_keys(r2
, r3
, r4
, r1
, 24, 20);
261 S6(r2
, r3
, r4
, r1
, r0
); store_and_load_keys(r4
, r0
, r3
, r1
, 20, 16);
262 S7(r4
, r0
, r3
, r1
, r2
); store_and_load_keys(r2
, r3
, r1
, r4
, 16, 12);
263 S0(r2
, r3
, r1
, r4
, r0
); store_and_load_keys(r1
, r3
, r4
, r2
, 12, 8);
264 S1(r1
, r3
, r4
, r2
, r0
); store_and_load_keys(r0
, r4
, r2
, r1
, 8, 4);
265 S2(r0
, r4
, r2
, r1
, r3
); store_and_load_keys(r3
, r4
, r0
, r1
, 4, 0);
266 S3(r3
, r4
, r0
, r1
, r2
); storekeys(r1
, r2
, r4
, r3
, 0);
269 int __serpent_setkey(struct serpent_ctx
*ctx
, const u8
*key
,
272 u32
*k
= ctx
->expkey
;
274 u32 r0
, r1
, r2
, r3
, r4
;
277 /* Copy key, add padding */
279 for (i
= 0; i
< keylen
; ++i
)
281 if (i
< SERPENT_MAX_KEY_SIZE
)
283 while (i
< SERPENT_MAX_KEY_SIZE
)
286 /* Expand key using polynomial */
288 r0
= le32_to_cpu(k
[3]);
289 r1
= le32_to_cpu(k
[4]);
290 r2
= le32_to_cpu(k
[5]);
291 r3
= le32_to_cpu(k
[6]);
292 r4
= le32_to_cpu(k
[7]);
294 keyiter(le32_to_cpu(k
[0]), r0
, r4
, r2
, 0, 0);
295 keyiter(le32_to_cpu(k
[1]), r1
, r0
, r3
, 1, 1);
296 keyiter(le32_to_cpu(k
[2]), r2
, r1
, r4
, 2, 2);
297 keyiter(le32_to_cpu(k
[3]), r3
, r2
, r0
, 3, 3);
298 keyiter(le32_to_cpu(k
[4]), r4
, r3
, r1
, 4, 4);
299 keyiter(le32_to_cpu(k
[5]), r0
, r4
, r2
, 5, 5);
300 keyiter(le32_to_cpu(k
[6]), r1
, r0
, r3
, 6, 6);
301 keyiter(le32_to_cpu(k
[7]), r2
, r1
, r4
, 7, 7);
303 keyiter(k
[0], r3
, r2
, r0
, 8, 8);
304 keyiter(k
[1], r4
, r3
, r1
, 9, 9);
305 keyiter(k
[2], r0
, r4
, r2
, 10, 10);
306 keyiter(k
[3], r1
, r0
, r3
, 11, 11);
307 keyiter(k
[4], r2
, r1
, r4
, 12, 12);
308 keyiter(k
[5], r3
, r2
, r0
, 13, 13);
309 keyiter(k
[6], r4
, r3
, r1
, 14, 14);
310 keyiter(k
[7], r0
, r4
, r2
, 15, 15);
311 keyiter(k
[8], r1
, r0
, r3
, 16, 16);
312 keyiter(k
[9], r2
, r1
, r4
, 17, 17);
313 keyiter(k
[10], r3
, r2
, r0
, 18, 18);
314 keyiter(k
[11], r4
, r3
, r1
, 19, 19);
315 keyiter(k
[12], r0
, r4
, r2
, 20, 20);
316 keyiter(k
[13], r1
, r0
, r3
, 21, 21);
317 keyiter(k
[14], r2
, r1
, r4
, 22, 22);
318 keyiter(k
[15], r3
, r2
, r0
, 23, 23);
319 keyiter(k
[16], r4
, r3
, r1
, 24, 24);
320 keyiter(k
[17], r0
, r4
, r2
, 25, 25);
321 keyiter(k
[18], r1
, r0
, r3
, 26, 26);
322 keyiter(k
[19], r2
, r1
, r4
, 27, 27);
323 keyiter(k
[20], r3
, r2
, r0
, 28, 28);
324 keyiter(k
[21], r4
, r3
, r1
, 29, 29);
325 keyiter(k
[22], r0
, r4
, r2
, 30, 30);
326 keyiter(k
[23], r1
, r0
, r3
, 31, 31);
330 keyiter(k
[-26], r2
, r1
, r4
, 32, -18);
331 keyiter(k
[-25], r3
, r2
, r0
, 33, -17);
332 keyiter(k
[-24], r4
, r3
, r1
, 34, -16);
333 keyiter(k
[-23], r0
, r4
, r2
, 35, -15);
334 keyiter(k
[-22], r1
, r0
, r3
, 36, -14);
335 keyiter(k
[-21], r2
, r1
, r4
, 37, -13);
336 keyiter(k
[-20], r3
, r2
, r0
, 38, -12);
337 keyiter(k
[-19], r4
, r3
, r1
, 39, -11);
338 keyiter(k
[-18], r0
, r4
, r2
, 40, -10);
339 keyiter(k
[-17], r1
, r0
, r3
, 41, -9);
340 keyiter(k
[-16], r2
, r1
, r4
, 42, -8);
341 keyiter(k
[-15], r3
, r2
, r0
, 43, -7);
342 keyiter(k
[-14], r4
, r3
, r1
, 44, -6);
343 keyiter(k
[-13], r0
, r4
, r2
, 45, -5);
344 keyiter(k
[-12], r1
, r0
, r3
, 46, -4);
345 keyiter(k
[-11], r2
, r1
, r4
, 47, -3);
346 keyiter(k
[-10], r3
, r2
, r0
, 48, -2);
347 keyiter(k
[-9], r4
, r3
, r1
, 49, -1);
348 keyiter(k
[-8], r0
, r4
, r2
, 50, 0);
349 keyiter(k
[-7], r1
, r0
, r3
, 51, 1);
350 keyiter(k
[-6], r2
, r1
, r4
, 52, 2);
351 keyiter(k
[-5], r3
, r2
, r0
, 53, 3);
352 keyiter(k
[-4], r4
, r3
, r1
, 54, 4);
353 keyiter(k
[-3], r0
, r4
, r2
, 55, 5);
354 keyiter(k
[-2], r1
, r0
, r3
, 56, 6);
355 keyiter(k
[-1], r2
, r1
, r4
, 57, 7);
356 keyiter(k
[0], r3
, r2
, r0
, 58, 8);
357 keyiter(k
[1], r4
, r3
, r1
, 59, 9);
358 keyiter(k
[2], r0
, r4
, r2
, 60, 10);
359 keyiter(k
[3], r1
, r0
, r3
, 61, 11);
360 keyiter(k
[4], r2
, r1
, r4
, 62, 12);
361 keyiter(k
[5], r3
, r2
, r0
, 63, 13);
362 keyiter(k
[6], r4
, r3
, r1
, 64, 14);
363 keyiter(k
[7], r0
, r4
, r2
, 65, 15);
364 keyiter(k
[8], r1
, r0
, r3
, 66, 16);
365 keyiter(k
[9], r2
, r1
, r4
, 67, 17);
366 keyiter(k
[10], r3
, r2
, r0
, 68, 18);
367 keyiter(k
[11], r4
, r3
, r1
, 69, 19);
368 keyiter(k
[12], r0
, r4
, r2
, 70, 20);
369 keyiter(k
[13], r1
, r0
, r3
, 71, 21);
370 keyiter(k
[14], r2
, r1
, r4
, 72, 22);
371 keyiter(k
[15], r3
, r2
, r0
, 73, 23);
372 keyiter(k
[16], r4
, r3
, r1
, 74, 24);
373 keyiter(k
[17], r0
, r4
, r2
, 75, 25);
374 keyiter(k
[18], r1
, r0
, r3
, 76, 26);
375 keyiter(k
[19], r2
, r1
, r4
, 77, 27);
376 keyiter(k
[20], r3
, r2
, r0
, 78, 28);
377 keyiter(k
[21], r4
, r3
, r1
, 79, 29);
378 keyiter(k
[22], r0
, r4
, r2
, 80, 30);
379 keyiter(k
[23], r1
, r0
, r3
, 81, 31);
383 keyiter(k
[-26], r2
, r1
, r4
, 82, -18);
384 keyiter(k
[-25], r3
, r2
, r0
, 83, -17);
385 keyiter(k
[-24], r4
, r3
, r1
, 84, -16);
386 keyiter(k
[-23], r0
, r4
, r2
, 85, -15);
387 keyiter(k
[-22], r1
, r0
, r3
, 86, -14);
388 keyiter(k
[-21], r2
, r1
, r4
, 87, -13);
389 keyiter(k
[-20], r3
, r2
, r0
, 88, -12);
390 keyiter(k
[-19], r4
, r3
, r1
, 89, -11);
391 keyiter(k
[-18], r0
, r4
, r2
, 90, -10);
392 keyiter(k
[-17], r1
, r0
, r3
, 91, -9);
393 keyiter(k
[-16], r2
, r1
, r4
, 92, -8);
394 keyiter(k
[-15], r3
, r2
, r0
, 93, -7);
395 keyiter(k
[-14], r4
, r3
, r1
, 94, -6);
396 keyiter(k
[-13], r0
, r4
, r2
, 95, -5);
397 keyiter(k
[-12], r1
, r0
, r3
, 96, -4);
398 keyiter(k
[-11], r2
, r1
, r4
, 97, -3);
399 keyiter(k
[-10], r3
, r2
, r0
, 98, -2);
400 keyiter(k
[-9], r4
, r3
, r1
, 99, -1);
401 keyiter(k
[-8], r0
, r4
, r2
, 100, 0);
402 keyiter(k
[-7], r1
, r0
, r3
, 101, 1);
403 keyiter(k
[-6], r2
, r1
, r4
, 102, 2);
404 keyiter(k
[-5], r3
, r2
, r0
, 103, 3);
405 keyiter(k
[-4], r4
, r3
, r1
, 104, 4);
406 keyiter(k
[-3], r0
, r4
, r2
, 105, 5);
407 keyiter(k
[-2], r1
, r0
, r3
, 106, 6);
408 keyiter(k
[-1], r2
, r1
, r4
, 107, 7);
409 keyiter(k
[0], r3
, r2
, r0
, 108, 8);
410 keyiter(k
[1], r4
, r3
, r1
, 109, 9);
411 keyiter(k
[2], r0
, r4
, r2
, 110, 10);
412 keyiter(k
[3], r1
, r0
, r3
, 111, 11);
413 keyiter(k
[4], r2
, r1
, r4
, 112, 12);
414 keyiter(k
[5], r3
, r2
, r0
, 113, 13);
415 keyiter(k
[6], r4
, r3
, r1
, 114, 14);
416 keyiter(k
[7], r0
, r4
, r2
, 115, 15);
417 keyiter(k
[8], r1
, r0
, r3
, 116, 16);
418 keyiter(k
[9], r2
, r1
, r4
, 117, 17);
419 keyiter(k
[10], r3
, r2
, r0
, 118, 18);
420 keyiter(k
[11], r4
, r3
, r1
, 119, 19);
421 keyiter(k
[12], r0
, r4
, r2
, 120, 20);
422 keyiter(k
[13], r1
, r0
, r3
, 121, 21);
423 keyiter(k
[14], r2
, r1
, r4
, 122, 22);
424 keyiter(k
[15], r3
, r2
, r0
, 123, 23);
425 keyiter(k
[16], r4
, r3
, r1
, 124, 24);
426 keyiter(k
[17], r0
, r4
, r2
, 125, 25);
427 keyiter(k
[18], r1
, r0
, r3
, 126, 26);
428 keyiter(k
[19], r2
, r1
, r4
, 127, 27);
429 keyiter(k
[20], r3
, r2
, r0
, 128, 28);
430 keyiter(k
[21], r4
, r3
, r1
, 129, 29);
431 keyiter(k
[22], r0
, r4
, r2
, 130, 30);
432 keyiter(k
[23], r1
, r0
, r3
, 131, 31);
435 __serpent_setkey_sbox(r0
, r1
, r2
, r3
, r4
, ctx
->expkey
);
439 EXPORT_SYMBOL_GPL(__serpent_setkey
);
441 int serpent_setkey(struct crypto_tfm
*tfm
, const u8
*key
, unsigned int keylen
)
443 return __serpent_setkey(crypto_tfm_ctx(tfm
), key
, keylen
);
445 EXPORT_SYMBOL_GPL(serpent_setkey
);
447 void __serpent_encrypt(const void *c
, u8
*dst
, const u8
*src
)
449 const struct serpent_ctx
*ctx
= c
;
450 const u32
*k
= ctx
->expkey
;
451 u32 r0
, r1
, r2
, r3
, r4
;
453 r0
= get_unaligned_le32(src
);
454 r1
= get_unaligned_le32(src
+ 4);
455 r2
= get_unaligned_le32(src
+ 8);
456 r3
= get_unaligned_le32(src
+ 12);
458 K(r0
, r1
, r2
, r3
, 0);
459 S0(r0
, r1
, r2
, r3
, r4
); LK(r2
, r1
, r3
, r0
, r4
, 1);
460 S1(r2
, r1
, r3
, r0
, r4
); LK(r4
, r3
, r0
, r2
, r1
, 2);
461 S2(r4
, r3
, r0
, r2
, r1
); LK(r1
, r3
, r4
, r2
, r0
, 3);
462 S3(r1
, r3
, r4
, r2
, r0
); LK(r2
, r0
, r3
, r1
, r4
, 4);
463 S4(r2
, r0
, r3
, r1
, r4
); LK(r0
, r3
, r1
, r4
, r2
, 5);
464 S5(r0
, r3
, r1
, r4
, r2
); LK(r2
, r0
, r3
, r4
, r1
, 6);
465 S6(r2
, r0
, r3
, r4
, r1
); LK(r3
, r1
, r0
, r4
, r2
, 7);
466 S7(r3
, r1
, r0
, r4
, r2
); LK(r2
, r0
, r4
, r3
, r1
, 8);
467 S0(r2
, r0
, r4
, r3
, r1
); LK(r4
, r0
, r3
, r2
, r1
, 9);
468 S1(r4
, r0
, r3
, r2
, r1
); LK(r1
, r3
, r2
, r4
, r0
, 10);
469 S2(r1
, r3
, r2
, r4
, r0
); LK(r0
, r3
, r1
, r4
, r2
, 11);
470 S3(r0
, r3
, r1
, r4
, r2
); LK(r4
, r2
, r3
, r0
, r1
, 12);
471 S4(r4
, r2
, r3
, r0
, r1
); LK(r2
, r3
, r0
, r1
, r4
, 13);
472 S5(r2
, r3
, r0
, r1
, r4
); LK(r4
, r2
, r3
, r1
, r0
, 14);
473 S6(r4
, r2
, r3
, r1
, r0
); LK(r3
, r0
, r2
, r1
, r4
, 15);
474 S7(r3
, r0
, r2
, r1
, r4
); LK(r4
, r2
, r1
, r3
, r0
, 16);
475 S0(r4
, r2
, r1
, r3
, r0
); LK(r1
, r2
, r3
, r4
, r0
, 17);
476 S1(r1
, r2
, r3
, r4
, r0
); LK(r0
, r3
, r4
, r1
, r2
, 18);
477 S2(r0
, r3
, r4
, r1
, r2
); LK(r2
, r3
, r0
, r1
, r4
, 19);
478 S3(r2
, r3
, r0
, r1
, r4
); LK(r1
, r4
, r3
, r2
, r0
, 20);
479 S4(r1
, r4
, r3
, r2
, r0
); LK(r4
, r3
, r2
, r0
, r1
, 21);
480 S5(r4
, r3
, r2
, r0
, r1
); LK(r1
, r4
, r3
, r0
, r2
, 22);
481 S6(r1
, r4
, r3
, r0
, r2
); LK(r3
, r2
, r4
, r0
, r1
, 23);
482 S7(r3
, r2
, r4
, r0
, r1
); LK(r1
, r4
, r0
, r3
, r2
, 24);
483 S0(r1
, r4
, r0
, r3
, r2
); LK(r0
, r4
, r3
, r1
, r2
, 25);
484 S1(r0
, r4
, r3
, r1
, r2
); LK(r2
, r3
, r1
, r0
, r4
, 26);
485 S2(r2
, r3
, r1
, r0
, r4
); LK(r4
, r3
, r2
, r0
, r1
, 27);
486 S3(r4
, r3
, r2
, r0
, r1
); LK(r0
, r1
, r3
, r4
, r2
, 28);
487 S4(r0
, r1
, r3
, r4
, r2
); LK(r1
, r3
, r4
, r2
, r0
, 29);
488 S5(r1
, r3
, r4
, r2
, r0
); LK(r0
, r1
, r3
, r2
, r4
, 30);
489 S6(r0
, r1
, r3
, r2
, r4
); LK(r3
, r4
, r1
, r2
, r0
, 31);
490 S7(r3
, r4
, r1
, r2
, r0
); K(r0
, r1
, r2
, r3
, 32);
492 put_unaligned_le32(r0
, dst
);
493 put_unaligned_le32(r1
, dst
+ 4);
494 put_unaligned_le32(r2
, dst
+ 8);
495 put_unaligned_le32(r3
, dst
+ 12);
497 EXPORT_SYMBOL_GPL(__serpent_encrypt
);
499 static void serpent_encrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
501 struct serpent_ctx
*ctx
= crypto_tfm_ctx(tfm
);
503 __serpent_encrypt(ctx
, dst
, src
);
506 void __serpent_decrypt(const void *c
, u8
*dst
, const u8
*src
)
508 const struct serpent_ctx
*ctx
= c
;
509 const u32
*k
= ctx
->expkey
;
510 u32 r0
, r1
, r2
, r3
, r4
;
512 r0
= get_unaligned_le32(src
);
513 r1
= get_unaligned_le32(src
+ 4);
514 r2
= get_unaligned_le32(src
+ 8);
515 r3
= get_unaligned_le32(src
+ 12);
517 K(r0
, r1
, r2
, r3
, 32);
518 SI7(r0
, r1
, r2
, r3
, r4
); KL(r1
, r3
, r0
, r4
, r2
, 31);
519 SI6(r1
, r3
, r0
, r4
, r2
); KL(r0
, r2
, r4
, r1
, r3
, 30);
520 SI5(r0
, r2
, r4
, r1
, r3
); KL(r2
, r3
, r0
, r4
, r1
, 29);
521 SI4(r2
, r3
, r0
, r4
, r1
); KL(r2
, r0
, r1
, r4
, r3
, 28);
522 SI3(r2
, r0
, r1
, r4
, r3
); KL(r1
, r2
, r3
, r4
, r0
, 27);
523 SI2(r1
, r2
, r3
, r4
, r0
); KL(r2
, r0
, r4
, r3
, r1
, 26);
524 SI1(r2
, r0
, r4
, r3
, r1
); KL(r1
, r0
, r4
, r3
, r2
, 25);
525 SI0(r1
, r0
, r4
, r3
, r2
); KL(r4
, r2
, r0
, r1
, r3
, 24);
526 SI7(r4
, r2
, r0
, r1
, r3
); KL(r2
, r1
, r4
, r3
, r0
, 23);
527 SI6(r2
, r1
, r4
, r3
, r0
); KL(r4
, r0
, r3
, r2
, r1
, 22);
528 SI5(r4
, r0
, r3
, r2
, r1
); KL(r0
, r1
, r4
, r3
, r2
, 21);
529 SI4(r0
, r1
, r4
, r3
, r2
); KL(r0
, r4
, r2
, r3
, r1
, 20);
530 SI3(r0
, r4
, r2
, r3
, r1
); KL(r2
, r0
, r1
, r3
, r4
, 19);
531 SI2(r2
, r0
, r1
, r3
, r4
); KL(r0
, r4
, r3
, r1
, r2
, 18);
532 SI1(r0
, r4
, r3
, r1
, r2
); KL(r2
, r4
, r3
, r1
, r0
, 17);
533 SI0(r2
, r4
, r3
, r1
, r0
); KL(r3
, r0
, r4
, r2
, r1
, 16);
534 SI7(r3
, r0
, r4
, r2
, r1
); KL(r0
, r2
, r3
, r1
, r4
, 15);
535 SI6(r0
, r2
, r3
, r1
, r4
); KL(r3
, r4
, r1
, r0
, r2
, 14);
536 SI5(r3
, r4
, r1
, r0
, r2
); KL(r4
, r2
, r3
, r1
, r0
, 13);
537 SI4(r4
, r2
, r3
, r1
, r0
); KL(r4
, r3
, r0
, r1
, r2
, 12);
538 SI3(r4
, r3
, r0
, r1
, r2
); KL(r0
, r4
, r2
, r1
, r3
, 11);
539 SI2(r0
, r4
, r2
, r1
, r3
); KL(r4
, r3
, r1
, r2
, r0
, 10);
540 SI1(r4
, r3
, r1
, r2
, r0
); KL(r0
, r3
, r1
, r2
, r4
, 9);
541 SI0(r0
, r3
, r1
, r2
, r4
); KL(r1
, r4
, r3
, r0
, r2
, 8);
542 SI7(r1
, r4
, r3
, r0
, r2
); KL(r4
, r0
, r1
, r2
, r3
, 7);
543 SI6(r4
, r0
, r1
, r2
, r3
); KL(r1
, r3
, r2
, r4
, r0
, 6);
544 SI5(r1
, r3
, r2
, r4
, r0
); KL(r3
, r0
, r1
, r2
, r4
, 5);
545 SI4(r3
, r0
, r1
, r2
, r4
); KL(r3
, r1
, r4
, r2
, r0
, 4);
546 SI3(r3
, r1
, r4
, r2
, r0
); KL(r4
, r3
, r0
, r2
, r1
, 3);
547 SI2(r4
, r3
, r0
, r2
, r1
); KL(r3
, r1
, r2
, r0
, r4
, 2);
548 SI1(r3
, r1
, r2
, r0
, r4
); KL(r4
, r1
, r2
, r0
, r3
, 1);
549 SI0(r4
, r1
, r2
, r0
, r3
); K(r2
, r3
, r1
, r4
, 0);
551 put_unaligned_le32(r2
, dst
);
552 put_unaligned_le32(r3
, dst
+ 4);
553 put_unaligned_le32(r1
, dst
+ 8);
554 put_unaligned_le32(r4
, dst
+ 12);
556 EXPORT_SYMBOL_GPL(__serpent_decrypt
);
558 static void serpent_decrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
560 struct serpent_ctx
*ctx
= crypto_tfm_ctx(tfm
);
562 __serpent_decrypt(ctx
, dst
, src
);
565 static struct crypto_alg srp_alg
= {
566 .cra_name
= "serpent",
567 .cra_driver_name
= "serpent-generic",
569 .cra_flags
= CRYPTO_ALG_TYPE_CIPHER
,
570 .cra_blocksize
= SERPENT_BLOCK_SIZE
,
571 .cra_ctxsize
= sizeof(struct serpent_ctx
),
572 .cra_module
= THIS_MODULE
,
573 .cra_u
= { .cipher
= {
574 .cia_min_keysize
= SERPENT_MIN_KEY_SIZE
,
575 .cia_max_keysize
= SERPENT_MAX_KEY_SIZE
,
576 .cia_setkey
= serpent_setkey
,
577 .cia_encrypt
= serpent_encrypt
,
578 .cia_decrypt
= serpent_decrypt
} }
581 static int __init
serpent_mod_init(void)
583 return crypto_register_alg(&srp_alg
);
586 static void __exit
serpent_mod_fini(void)
588 crypto_unregister_alg(&srp_alg
);
591 subsys_initcall(serpent_mod_init
);
592 module_exit(serpent_mod_fini
);
594 MODULE_LICENSE("GPL");
595 MODULE_DESCRIPTION("Serpent Cipher Algorithm");
596 MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
597 MODULE_ALIAS_CRYPTO("serpent");
598 MODULE_ALIAS_CRYPTO("serpent-generic");