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7efe4076 JG |
1 | /* |
2 | * Glue Code for AVX assembler versions of Serpent Cipher | |
3 | * | |
4 | * Copyright (C) 2012 Johannes Goetzfried | |
5 | * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> | |
6 | * | |
a05248ed | 7 | * Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
7efe4076 JG |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/hardirq.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/crypto.h> | |
30 | #include <linux/err.h> | |
801201aa | 31 | #include <crypto/ablk_helper.h> |
7efe4076 JG |
32 | #include <crypto/algapi.h> |
33 | #include <crypto/serpent.h> | |
34 | #include <crypto/cryptd.h> | |
35 | #include <crypto/b128ops.h> | |
36 | #include <crypto/ctr.h> | |
37 | #include <crypto/lrw.h> | |
38 | #include <crypto/xts.h> | |
7efe4076 JG |
39 | #include <asm/xcr.h> |
40 | #include <asm/xsave.h> | |
d4af0e9d | 41 | #include <asm/crypto/serpent-avx.h> |
1d0debbd | 42 | #include <asm/crypto/glue_helper.h> |
7efe4076 | 43 | |
56d76c96 JK |
44 | /* 8-way parallel cipher functions */ |
45 | asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
46 | const u8 *src); | |
47 | EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx); | |
48 | ||
49 | asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
50 | const u8 *src); | |
51 | EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx); | |
52 | ||
53 | asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
54 | const u8 *src); | |
55 | EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx); | |
56 | ||
57 | asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
58 | const u8 *src, le128 *iv); | |
59 | EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx); | |
60 | ||
61 | asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
62 | const u8 *src, le128 *iv); | |
63 | EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx); | |
64 | ||
65 | asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, | |
66 | const u8 *src, le128 *iv); | |
67 | EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx); | |
68 | ||
69 | void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv) | |
7efe4076 | 70 | { |
1d0debbd | 71 | be128 ctrblk; |
7efe4076 | 72 | |
58990986 JK |
73 | le128_to_be128(&ctrblk, iv); |
74 | le128_inc(iv); | |
7efe4076 | 75 | |
1d0debbd JK |
76 | __serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk); |
77 | u128_xor(dst, src, (u128 *)&ctrblk); | |
7efe4076 | 78 | } |
56d76c96 | 79 | EXPORT_SYMBOL_GPL(__serpent_crypt_ctr); |
7efe4076 | 80 | |
56d76c96 | 81 | void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
a05248ed JK |
82 | { |
83 | glue_xts_crypt_128bit_one(ctx, dst, src, iv, | |
84 | GLUE_FUNC_CAST(__serpent_encrypt)); | |
85 | } | |
56d76c96 | 86 | EXPORT_SYMBOL_GPL(serpent_xts_enc); |
a05248ed | 87 | |
56d76c96 | 88 | void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
a05248ed JK |
89 | { |
90 | glue_xts_crypt_128bit_one(ctx, dst, src, iv, | |
91 | GLUE_FUNC_CAST(__serpent_decrypt)); | |
92 | } | |
56d76c96 JK |
93 | EXPORT_SYMBOL_GPL(serpent_xts_dec); |
94 | ||
a05248ed | 95 | |
1d0debbd JK |
96 | static const struct common_glue_ctx serpent_enc = { |
97 | .num_funcs = 2, | |
98 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
7efe4076 | 99 | |
1d0debbd JK |
100 | .funcs = { { |
101 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
facd416f | 102 | .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) } |
1d0debbd JK |
103 | }, { |
104 | .num_blocks = 1, | |
105 | .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) } | |
106 | } } | |
107 | }; | |
7efe4076 | 108 | |
1d0debbd JK |
109 | static const struct common_glue_ctx serpent_ctr = { |
110 | .num_funcs = 2, | |
111 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
112 | ||
113 | .funcs = { { | |
114 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
facd416f | 115 | .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) } |
1d0debbd JK |
116 | }, { |
117 | .num_blocks = 1, | |
56d76c96 | 118 | .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) } |
1d0debbd JK |
119 | } } |
120 | }; | |
7efe4076 | 121 | |
a05248ed JK |
122 | static const struct common_glue_ctx serpent_enc_xts = { |
123 | .num_funcs = 2, | |
124 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
125 | ||
126 | .funcs = { { | |
127 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
128 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) } | |
129 | }, { | |
130 | .num_blocks = 1, | |
131 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) } | |
132 | } } | |
133 | }; | |
134 | ||
1d0debbd JK |
135 | static const struct common_glue_ctx serpent_dec = { |
136 | .num_funcs = 2, | |
137 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
138 | ||
139 | .funcs = { { | |
140 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
facd416f | 141 | .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) } |
1d0debbd JK |
142 | }, { |
143 | .num_blocks = 1, | |
144 | .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) } | |
145 | } } | |
146 | }; | |
7efe4076 | 147 | |
1d0debbd JK |
148 | static const struct common_glue_ctx serpent_dec_cbc = { |
149 | .num_funcs = 2, | |
150 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
151 | ||
152 | .funcs = { { | |
153 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
facd416f | 154 | .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) } |
1d0debbd JK |
155 | }, { |
156 | .num_blocks = 1, | |
157 | .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) } | |
158 | } } | |
159 | }; | |
7efe4076 | 160 | |
a05248ed JK |
161 | static const struct common_glue_ctx serpent_dec_xts = { |
162 | .num_funcs = 2, | |
163 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, | |
164 | ||
165 | .funcs = { { | |
166 | .num_blocks = SERPENT_PARALLEL_BLOCKS, | |
167 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) } | |
168 | }, { | |
169 | .num_blocks = 1, | |
170 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) } | |
171 | } } | |
172 | }; | |
173 | ||
1d0debbd | 174 | static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
7efe4076 JG |
175 | struct scatterlist *src, unsigned int nbytes) |
176 | { | |
1d0debbd | 177 | return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes); |
7efe4076 JG |
178 | } |
179 | ||
1d0debbd JK |
180 | static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
181 | struct scatterlist *src, unsigned int nbytes) | |
7efe4076 | 182 | { |
1d0debbd | 183 | return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes); |
7efe4076 JG |
184 | } |
185 | ||
1d0debbd JK |
186 | static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
187 | struct scatterlist *src, unsigned int nbytes) | |
7efe4076 | 188 | { |
1d0debbd JK |
189 | return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc, |
190 | dst, src, nbytes); | |
7efe4076 JG |
191 | } |
192 | ||
1d0debbd JK |
193 | static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
194 | struct scatterlist *src, unsigned int nbytes) | |
7efe4076 | 195 | { |
1d0debbd JK |
196 | return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src, |
197 | nbytes); | |
7efe4076 JG |
198 | } |
199 | ||
1d0debbd JK |
200 | static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
201 | struct scatterlist *src, unsigned int nbytes) | |
7efe4076 | 202 | { |
1d0debbd | 203 | return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes); |
7efe4076 JG |
204 | } |
205 | ||
1d0debbd | 206 | static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes) |
7efe4076 | 207 | { |
1d0debbd JK |
208 | return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS, |
209 | NULL, fpu_enabled, nbytes); | |
7efe4076 JG |
210 | } |
211 | ||
1d0debbd | 212 | static inline void serpent_fpu_end(bool fpu_enabled) |
7efe4076 | 213 | { |
1d0debbd | 214 | glue_fpu_end(fpu_enabled); |
7efe4076 JG |
215 | } |
216 | ||
217 | struct crypt_priv { | |
218 | struct serpent_ctx *ctx; | |
219 | bool fpu_enabled; | |
220 | }; | |
221 | ||
222 | static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) | |
223 | { | |
224 | const unsigned int bsize = SERPENT_BLOCK_SIZE; | |
225 | struct crypt_priv *ctx = priv; | |
226 | int i; | |
227 | ||
228 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); | |
229 | ||
230 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { | |
facd416f | 231 | serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst); |
7efe4076 JG |
232 | return; |
233 | } | |
234 | ||
235 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) | |
236 | __serpent_encrypt(ctx->ctx, srcdst, srcdst); | |
237 | } | |
238 | ||
239 | static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) | |
240 | { | |
241 | const unsigned int bsize = SERPENT_BLOCK_SIZE; | |
242 | struct crypt_priv *ctx = priv; | |
243 | int i; | |
244 | ||
245 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); | |
246 | ||
247 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { | |
facd416f | 248 | serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst); |
7efe4076 JG |
249 | return; |
250 | } | |
251 | ||
252 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) | |
253 | __serpent_decrypt(ctx->ctx, srcdst, srcdst); | |
254 | } | |
255 | ||
56d76c96 JK |
256 | int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
257 | unsigned int keylen) | |
7efe4076 JG |
258 | { |
259 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); | |
260 | int err; | |
261 | ||
262 | err = __serpent_setkey(&ctx->serpent_ctx, key, keylen - | |
263 | SERPENT_BLOCK_SIZE); | |
264 | if (err) | |
265 | return err; | |
266 | ||
267 | return lrw_init_table(&ctx->lrw_table, key + keylen - | |
268 | SERPENT_BLOCK_SIZE); | |
269 | } | |
56d76c96 | 270 | EXPORT_SYMBOL_GPL(lrw_serpent_setkey); |
7efe4076 JG |
271 | |
272 | static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
273 | struct scatterlist *src, unsigned int nbytes) | |
274 | { | |
275 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
276 | be128 buf[SERPENT_PARALLEL_BLOCKS]; | |
277 | struct crypt_priv crypt_ctx = { | |
278 | .ctx = &ctx->serpent_ctx, | |
279 | .fpu_enabled = false, | |
280 | }; | |
281 | struct lrw_crypt_req req = { | |
282 | .tbuf = buf, | |
283 | .tbuflen = sizeof(buf), | |
284 | ||
285 | .table_ctx = &ctx->lrw_table, | |
286 | .crypt_ctx = &crypt_ctx, | |
287 | .crypt_fn = encrypt_callback, | |
288 | }; | |
289 | int ret; | |
290 | ||
291 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
292 | ret = lrw_crypt(desc, dst, src, nbytes, &req); | |
293 | serpent_fpu_end(crypt_ctx.fpu_enabled); | |
294 | ||
295 | return ret; | |
296 | } | |
297 | ||
298 | static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
299 | struct scatterlist *src, unsigned int nbytes) | |
300 | { | |
301 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
302 | be128 buf[SERPENT_PARALLEL_BLOCKS]; | |
303 | struct crypt_priv crypt_ctx = { | |
304 | .ctx = &ctx->serpent_ctx, | |
305 | .fpu_enabled = false, | |
306 | }; | |
307 | struct lrw_crypt_req req = { | |
308 | .tbuf = buf, | |
309 | .tbuflen = sizeof(buf), | |
310 | ||
311 | .table_ctx = &ctx->lrw_table, | |
312 | .crypt_ctx = &crypt_ctx, | |
313 | .crypt_fn = decrypt_callback, | |
314 | }; | |
315 | int ret; | |
316 | ||
317 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
318 | ret = lrw_crypt(desc, dst, src, nbytes, &req); | |
319 | serpent_fpu_end(crypt_ctx.fpu_enabled); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
56d76c96 | 324 | void lrw_serpent_exit_tfm(struct crypto_tfm *tfm) |
7efe4076 JG |
325 | { |
326 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); | |
327 | ||
328 | lrw_free_table(&ctx->lrw_table); | |
329 | } | |
56d76c96 | 330 | EXPORT_SYMBOL_GPL(lrw_serpent_exit_tfm); |
7efe4076 | 331 | |
56d76c96 JK |
332 | int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
333 | unsigned int keylen) | |
7efe4076 JG |
334 | { |
335 | struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm); | |
336 | u32 *flags = &tfm->crt_flags; | |
337 | int err; | |
338 | ||
339 | /* key consists of keys of equal size concatenated, therefore | |
340 | * the length must be even | |
341 | */ | |
342 | if (keylen % 2) { | |
343 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | /* first half of xts-key is for crypt */ | |
348 | err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2); | |
349 | if (err) | |
350 | return err; | |
351 | ||
352 | /* second half of xts-key is for tweak */ | |
353 | return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2); | |
354 | } | |
56d76c96 | 355 | EXPORT_SYMBOL_GPL(xts_serpent_setkey); |
7efe4076 JG |
356 | |
357 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
358 | struct scatterlist *src, unsigned int nbytes) | |
359 | { | |
360 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
7efe4076 | 361 | |
a05248ed JK |
362 | return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes, |
363 | XTS_TWEAK_CAST(__serpent_encrypt), | |
364 | &ctx->tweak_ctx, &ctx->crypt_ctx); | |
7efe4076 JG |
365 | } |
366 | ||
367 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
368 | struct scatterlist *src, unsigned int nbytes) | |
369 | { | |
370 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
7efe4076 | 371 | |
a05248ed JK |
372 | return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes, |
373 | XTS_TWEAK_CAST(__serpent_encrypt), | |
374 | &ctx->tweak_ctx, &ctx->crypt_ctx); | |
7efe4076 JG |
375 | } |
376 | ||
7efe4076 JG |
377 | static struct crypto_alg serpent_algs[10] = { { |
378 | .cra_name = "__ecb-serpent-avx", | |
379 | .cra_driver_name = "__driver-ecb-serpent-avx", | |
380 | .cra_priority = 0, | |
381 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
382 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
383 | .cra_ctxsize = sizeof(struct serpent_ctx), | |
384 | .cra_alignmask = 0, | |
385 | .cra_type = &crypto_blkcipher_type, | |
386 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
387 | .cra_u = { |
388 | .blkcipher = { | |
389 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
390 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
391 | .setkey = serpent_setkey, | |
392 | .encrypt = ecb_encrypt, | |
393 | .decrypt = ecb_decrypt, | |
394 | }, | |
395 | }, | |
396 | }, { | |
397 | .cra_name = "__cbc-serpent-avx", | |
398 | .cra_driver_name = "__driver-cbc-serpent-avx", | |
399 | .cra_priority = 0, | |
400 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
401 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
402 | .cra_ctxsize = sizeof(struct serpent_ctx), | |
403 | .cra_alignmask = 0, | |
404 | .cra_type = &crypto_blkcipher_type, | |
405 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
406 | .cra_u = { |
407 | .blkcipher = { | |
408 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
409 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
410 | .setkey = serpent_setkey, | |
411 | .encrypt = cbc_encrypt, | |
412 | .decrypt = cbc_decrypt, | |
413 | }, | |
414 | }, | |
415 | }, { | |
416 | .cra_name = "__ctr-serpent-avx", | |
417 | .cra_driver_name = "__driver-ctr-serpent-avx", | |
418 | .cra_priority = 0, | |
419 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
420 | .cra_blocksize = 1, | |
421 | .cra_ctxsize = sizeof(struct serpent_ctx), | |
422 | .cra_alignmask = 0, | |
423 | .cra_type = &crypto_blkcipher_type, | |
424 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
425 | .cra_u = { |
426 | .blkcipher = { | |
427 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
428 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
429 | .ivsize = SERPENT_BLOCK_SIZE, | |
430 | .setkey = serpent_setkey, | |
431 | .encrypt = ctr_crypt, | |
432 | .decrypt = ctr_crypt, | |
433 | }, | |
434 | }, | |
435 | }, { | |
436 | .cra_name = "__lrw-serpent-avx", | |
437 | .cra_driver_name = "__driver-lrw-serpent-avx", | |
438 | .cra_priority = 0, | |
439 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
440 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
441 | .cra_ctxsize = sizeof(struct serpent_lrw_ctx), | |
442 | .cra_alignmask = 0, | |
443 | .cra_type = &crypto_blkcipher_type, | |
444 | .cra_module = THIS_MODULE, | |
56d76c96 | 445 | .cra_exit = lrw_serpent_exit_tfm, |
7efe4076 JG |
446 | .cra_u = { |
447 | .blkcipher = { | |
448 | .min_keysize = SERPENT_MIN_KEY_SIZE + | |
449 | SERPENT_BLOCK_SIZE, | |
450 | .max_keysize = SERPENT_MAX_KEY_SIZE + | |
451 | SERPENT_BLOCK_SIZE, | |
452 | .ivsize = SERPENT_BLOCK_SIZE, | |
453 | .setkey = lrw_serpent_setkey, | |
454 | .encrypt = lrw_encrypt, | |
455 | .decrypt = lrw_decrypt, | |
456 | }, | |
457 | }, | |
458 | }, { | |
459 | .cra_name = "__xts-serpent-avx", | |
460 | .cra_driver_name = "__driver-xts-serpent-avx", | |
461 | .cra_priority = 0, | |
462 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
463 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
464 | .cra_ctxsize = sizeof(struct serpent_xts_ctx), | |
465 | .cra_alignmask = 0, | |
466 | .cra_type = &crypto_blkcipher_type, | |
467 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
468 | .cra_u = { |
469 | .blkcipher = { | |
470 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, | |
471 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, | |
472 | .ivsize = SERPENT_BLOCK_SIZE, | |
473 | .setkey = xts_serpent_setkey, | |
474 | .encrypt = xts_encrypt, | |
475 | .decrypt = xts_decrypt, | |
476 | }, | |
477 | }, | |
478 | }, { | |
479 | .cra_name = "ecb(serpent)", | |
480 | .cra_driver_name = "ecb-serpent-avx", | |
481 | .cra_priority = 500, | |
482 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
483 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
ffaf9156 | 484 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
7efe4076 JG |
485 | .cra_alignmask = 0, |
486 | .cra_type = &crypto_ablkcipher_type, | |
487 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
488 | .cra_init = ablk_init, |
489 | .cra_exit = ablk_exit, | |
490 | .cra_u = { | |
491 | .ablkcipher = { | |
492 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
493 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
494 | .setkey = ablk_set_key, | |
495 | .encrypt = ablk_encrypt, | |
496 | .decrypt = ablk_decrypt, | |
497 | }, | |
498 | }, | |
499 | }, { | |
500 | .cra_name = "cbc(serpent)", | |
501 | .cra_driver_name = "cbc-serpent-avx", | |
502 | .cra_priority = 500, | |
503 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
504 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
ffaf9156 | 505 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
7efe4076 JG |
506 | .cra_alignmask = 0, |
507 | .cra_type = &crypto_ablkcipher_type, | |
508 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
509 | .cra_init = ablk_init, |
510 | .cra_exit = ablk_exit, | |
511 | .cra_u = { | |
512 | .ablkcipher = { | |
513 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
514 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
515 | .ivsize = SERPENT_BLOCK_SIZE, | |
516 | .setkey = ablk_set_key, | |
517 | .encrypt = __ablk_encrypt, | |
518 | .decrypt = ablk_decrypt, | |
519 | }, | |
520 | }, | |
521 | }, { | |
522 | .cra_name = "ctr(serpent)", | |
523 | .cra_driver_name = "ctr-serpent-avx", | |
524 | .cra_priority = 500, | |
525 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
526 | .cra_blocksize = 1, | |
ffaf9156 | 527 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
7efe4076 JG |
528 | .cra_alignmask = 0, |
529 | .cra_type = &crypto_ablkcipher_type, | |
530 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
531 | .cra_init = ablk_init, |
532 | .cra_exit = ablk_exit, | |
533 | .cra_u = { | |
534 | .ablkcipher = { | |
535 | .min_keysize = SERPENT_MIN_KEY_SIZE, | |
536 | .max_keysize = SERPENT_MAX_KEY_SIZE, | |
537 | .ivsize = SERPENT_BLOCK_SIZE, | |
538 | .setkey = ablk_set_key, | |
539 | .encrypt = ablk_encrypt, | |
540 | .decrypt = ablk_encrypt, | |
541 | .geniv = "chainiv", | |
542 | }, | |
543 | }, | |
544 | }, { | |
545 | .cra_name = "lrw(serpent)", | |
546 | .cra_driver_name = "lrw-serpent-avx", | |
547 | .cra_priority = 500, | |
548 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
549 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
ffaf9156 | 550 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
7efe4076 JG |
551 | .cra_alignmask = 0, |
552 | .cra_type = &crypto_ablkcipher_type, | |
553 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
554 | .cra_init = ablk_init, |
555 | .cra_exit = ablk_exit, | |
556 | .cra_u = { | |
557 | .ablkcipher = { | |
558 | .min_keysize = SERPENT_MIN_KEY_SIZE + | |
559 | SERPENT_BLOCK_SIZE, | |
560 | .max_keysize = SERPENT_MAX_KEY_SIZE + | |
561 | SERPENT_BLOCK_SIZE, | |
562 | .ivsize = SERPENT_BLOCK_SIZE, | |
563 | .setkey = ablk_set_key, | |
564 | .encrypt = ablk_encrypt, | |
565 | .decrypt = ablk_decrypt, | |
566 | }, | |
567 | }, | |
568 | }, { | |
569 | .cra_name = "xts(serpent)", | |
570 | .cra_driver_name = "xts-serpent-avx", | |
571 | .cra_priority = 500, | |
572 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
573 | .cra_blocksize = SERPENT_BLOCK_SIZE, | |
ffaf9156 | 574 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
7efe4076 JG |
575 | .cra_alignmask = 0, |
576 | .cra_type = &crypto_ablkcipher_type, | |
577 | .cra_module = THIS_MODULE, | |
7efe4076 JG |
578 | .cra_init = ablk_init, |
579 | .cra_exit = ablk_exit, | |
580 | .cra_u = { | |
581 | .ablkcipher = { | |
582 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, | |
583 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, | |
584 | .ivsize = SERPENT_BLOCK_SIZE, | |
585 | .setkey = ablk_set_key, | |
586 | .encrypt = ablk_encrypt, | |
587 | .decrypt = ablk_decrypt, | |
588 | }, | |
589 | }, | |
590 | } }; | |
591 | ||
592 | static int __init serpent_init(void) | |
593 | { | |
594 | u64 xcr0; | |
595 | ||
596 | if (!cpu_has_avx || !cpu_has_osxsave) { | |
597 | printk(KERN_INFO "AVX instructions are not detected.\n"); | |
598 | return -ENODEV; | |
599 | } | |
600 | ||
601 | xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
602 | if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) { | |
603 | printk(KERN_INFO "AVX detected but unusable.\n"); | |
604 | return -ENODEV; | |
605 | } | |
606 | ||
607 | return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); | |
608 | } | |
609 | ||
610 | static void __exit serpent_exit(void) | |
611 | { | |
612 | crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); | |
613 | } | |
614 | ||
615 | module_init(serpent_init); | |
616 | module_exit(serpent_exit); | |
617 | ||
618 | MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized"); | |
619 | MODULE_LICENSE("GPL"); | |
620 | MODULE_ALIAS("serpent"); |