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-rw-r--r--arch/x86/crypto/serpent_sse2_glue.c719
1 files changed, 719 insertions, 0 deletions
diff --git a/arch/x86/crypto/serpent_sse2_glue.c b/arch/x86/crypto/serpent_sse2_glue.c
new file mode 100644
index 000000000000..947cf570f6a7
--- /dev/null
+++ b/arch/x86/crypto/serpent_sse2_glue.c
@@ -0,0 +1,719 @@
1/*
2 * Glue Code for SSE2 assembler versions of Serpent Cipher
3 *
4 * Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
5 *
6 * Glue code based on aesni-intel_glue.c by:
7 * Copyright (C) 2008, Intel Corp.
8 * Author: Huang Ying <ying.huang@intel.com>
9 *
10 * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
11 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
12 * CTR part based on code (crypto/ctr.c) by:
13 * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 * USA
29 *
30 */
31
32#include <linux/module.h>
33#include <linux/hardirq.h>
34#include <linux/types.h>
35#include <linux/crypto.h>
36#include <linux/err.h>
37#include <crypto/algapi.h>
38#include <crypto/serpent.h>
39#include <crypto/cryptd.h>
40#include <crypto/b128ops.h>
41#include <crypto/ctr.h>
42#include <asm/i387.h>
43#include <asm/serpent.h>
44#include <crypto/scatterwalk.h>
45#include <linux/workqueue.h>
46#include <linux/spinlock.h>
47
48struct async_serpent_ctx {
49 struct cryptd_ablkcipher *cryptd_tfm;
50};
51
52static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
53{
54 if (fpu_enabled)
55 return true;
56
57 /* SSE2 is only used when chunk to be processed is large enough, so
58 * do not enable FPU until it is necessary.
59 */
60 if (nbytes < SERPENT_BLOCK_SIZE * SERPENT_PARALLEL_BLOCKS)
61 return false;
62
63 kernel_fpu_begin();
64 return true;
65}
66
67static inline void serpent_fpu_end(bool fpu_enabled)
68{
69 if (fpu_enabled)
70 kernel_fpu_end();
71}
72
73static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
74 bool enc)
75{
76 bool fpu_enabled = false;
77 struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
78 const unsigned int bsize = SERPENT_BLOCK_SIZE;
79 unsigned int nbytes;
80 int err;
81
82 err = blkcipher_walk_virt(desc, walk);
83 desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
84
85 while ((nbytes = walk->nbytes)) {
86 u8 *wsrc = walk->src.virt.addr;
87 u8 *wdst = walk->dst.virt.addr;
88
89 fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
90
91 /* Process multi-block batch */
92 if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
93 do {
94 if (enc)
95 serpent_enc_blk_xway(ctx, wdst, wsrc);
96 else
97 serpent_dec_blk_xway(ctx, wdst, wsrc);
98
99 wsrc += bsize * SERPENT_PARALLEL_BLOCKS;
100 wdst += bsize * SERPENT_PARALLEL_BLOCKS;
101 nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
102 } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
103
104 if (nbytes < bsize)
105 goto done;
106 }
107
108 /* Handle leftovers */
109 do {
110 if (enc)
111 __serpent_encrypt(ctx, wdst, wsrc);
112 else
113 __serpent_decrypt(ctx, wdst, wsrc);
114
115 wsrc += bsize;
116 wdst += bsize;
117 nbytes -= bsize;
118 } while (nbytes >= bsize);
119
120done:
121 err = blkcipher_walk_done(desc, walk, nbytes);
122 }
123
124 serpent_fpu_end(fpu_enabled);
125 return err;
126}
127
128static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
129 struct scatterlist *src, unsigned int nbytes)
130{
131 struct blkcipher_walk walk;
132
133 blkcipher_walk_init(&walk, dst, src, nbytes);
134 return ecb_crypt(desc, &walk, true);
135}
136
137static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
138 struct scatterlist *src, unsigned int nbytes)
139{
140 struct blkcipher_walk walk;
141
142 blkcipher_walk_init(&walk, dst, src, nbytes);
143 return ecb_crypt(desc, &walk, false);
144}
145
146static struct crypto_alg blk_ecb_alg = {
147 .cra_name = "__ecb-serpent-sse2",
148 .cra_driver_name = "__driver-ecb-serpent-sse2",
149 .cra_priority = 0,
150 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
151 .cra_blocksize = SERPENT_BLOCK_SIZE,
152 .cra_ctxsize = sizeof(struct serpent_ctx),
153 .cra_alignmask = 0,
154 .cra_type = &crypto_blkcipher_type,
155 .cra_module = THIS_MODULE,
156 .cra_list = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
157 .cra_u = {
158 .blkcipher = {
159 .min_keysize = SERPENT_MIN_KEY_SIZE,
160 .max_keysize = SERPENT_MAX_KEY_SIZE,
161 .setkey = serpent_setkey,
162 .encrypt = ecb_encrypt,
163 .decrypt = ecb_decrypt,
164 },
165 },
166};
167
168static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
169 struct blkcipher_walk *walk)
170{
171 struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
172 const unsigned int bsize = SERPENT_BLOCK_SIZE;
173 unsigned int nbytes = walk->nbytes;
174 u128 *src = (u128 *)walk->src.virt.addr;
175 u128 *dst = (u128 *)walk->dst.virt.addr;
176 u128 *iv = (u128 *)walk->iv;
177
178 do {
179 u128_xor(dst, src, iv);
180 __serpent_encrypt(ctx, (u8 *)dst, (u8 *)dst);
181 iv = dst;
182
183 src += 1;
184 dst += 1;
185 nbytes -= bsize;
186 } while (nbytes >= bsize);
187
188 u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
189 return nbytes;
190}
191
192static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
193 struct scatterlist *src, unsigned int nbytes)
194{
195 struct blkcipher_walk walk;
196 int err;
197
198 blkcipher_walk_init(&walk, dst, src, nbytes);
199 err = blkcipher_walk_virt(desc, &walk);
200
201 while ((nbytes = walk.nbytes)) {
202 nbytes = __cbc_encrypt(desc, &walk);
203 err = blkcipher_walk_done(desc, &walk, nbytes);
204 }
205
206 return err;
207}
208
209static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
210 struct blkcipher_walk *walk)
211{
212 struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
213 const unsigned int bsize = SERPENT_BLOCK_SIZE;
214 unsigned int nbytes = walk->nbytes;
215 u128 *src = (u128 *)walk->src.virt.addr;
216 u128 *dst = (u128 *)walk->dst.virt.addr;
217 u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
218 u128 last_iv;
219 int i;
220
221 /* Start of the last block. */
222 src += nbytes / bsize - 1;
223 dst += nbytes / bsize - 1;
224
225 last_iv = *src;
226
227 /* Process multi-block batch */
228 if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
229 do {
230 nbytes -= bsize * (SERPENT_PARALLEL_BLOCKS - 1);
231 src -= SERPENT_PARALLEL_BLOCKS - 1;
232 dst -= SERPENT_PARALLEL_BLOCKS - 1;
233
234 for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
235 ivs[i] = src[i];
236
237 serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
238
239 for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
240 u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
241
242 nbytes -= bsize;
243 if (nbytes < bsize)
244 goto done;
245
246 u128_xor(dst, dst, src - 1);
247 src -= 1;
248 dst -= 1;
249 } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
250
251 if (nbytes < bsize)
252 goto done;
253 }
254
255 /* Handle leftovers */
256 for (;;) {
257 __serpent_decrypt(ctx, (u8 *)dst, (u8 *)src);
258
259 nbytes -= bsize;
260 if (nbytes < bsize)
261 break;
262
263 u128_xor(dst, dst, src - 1);
264 src -= 1;
265 dst -= 1;
266 }
267
268done:
269 u128_xor(dst, dst, (u128 *)walk->iv);
270 *(u128 *)walk->iv = last_iv;
271
272 return nbytes;
273}
274
275static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
276 struct scatterlist *src, unsigned int nbytes)
277{
278 bool fpu_enabled = false;
279 struct blkcipher_walk walk;
280 int err;
281
282 blkcipher_walk_init(&walk, dst, src, nbytes);
283 err = blkcipher_walk_virt(desc, &walk);
284 desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
285
286 while ((nbytes = walk.nbytes)) {
287 fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
288 nbytes = __cbc_decrypt(desc, &walk);
289 err = blkcipher_walk_done(desc, &walk, nbytes);
290 }
291
292 serpent_fpu_end(fpu_enabled);
293 return err;
294}
295
296static struct crypto_alg blk_cbc_alg = {
297 .cra_name = "__cbc-serpent-sse2",
298 .cra_driver_name = "__driver-cbc-serpent-sse2",
299 .cra_priority = 0,
300 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
301 .cra_blocksize = SERPENT_BLOCK_SIZE,
302 .cra_ctxsize = sizeof(struct serpent_ctx),
303 .cra_alignmask = 0,
304 .cra_type = &crypto_blkcipher_type,
305 .cra_module = THIS_MODULE,
306 .cra_list = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
307 .cra_u = {
308 .blkcipher = {
309 .min_keysize = SERPENT_MIN_KEY_SIZE,
310 .max_keysize = SERPENT_MAX_KEY_SIZE,
311 .setkey = serpent_setkey,
312 .encrypt = cbc_encrypt,
313 .decrypt = cbc_decrypt,
314 },
315 },
316};
317
318static inline void u128_to_be128(be128 *dst, const u128 *src)
319{
320 dst->a = cpu_to_be64(src->a);
321 dst->b = cpu_to_be64(src->b);
322}
323
324static inline void be128_to_u128(u128 *dst, const be128 *src)
325{
326 dst->a = be64_to_cpu(src->a);
327 dst->b = be64_to_cpu(src->b);
328}
329
330static inline void u128_inc(u128 *i)
331{
332 i->b++;
333 if (!i->b)
334 i->a++;
335}
336
337static void ctr_crypt_final(struct blkcipher_desc *desc,
338 struct blkcipher_walk *walk)
339{
340 struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
341 u8 *ctrblk = walk->iv;
342 u8 keystream[SERPENT_BLOCK_SIZE];
343 u8 *src = walk->src.virt.addr;
344 u8 *dst = walk->dst.virt.addr;
345 unsigned int nbytes = walk->nbytes;
346
347 __serpent_encrypt(ctx, keystream, ctrblk);
348 crypto_xor(keystream, src, nbytes);
349 memcpy(dst, keystream, nbytes);
350
351 crypto_inc(ctrblk, SERPENT_BLOCK_SIZE);
352}
353
354static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
355 struct blkcipher_walk *walk)
356{
357 struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
358 const unsigned int bsize = SERPENT_BLOCK_SIZE;
359 unsigned int nbytes = walk->nbytes;
360 u128 *src = (u128 *)walk->src.virt.addr;
361 u128 *dst = (u128 *)walk->dst.virt.addr;
362 u128 ctrblk;
363 be128 ctrblocks[SERPENT_PARALLEL_BLOCKS];
364 int i;
365
366 be128_to_u128(&ctrblk, (be128 *)walk->iv);
367
368 /* Process multi-block batch */
369 if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
370 do {
371 /* create ctrblks for parallel encrypt */
372 for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) {
373 if (dst != src)
374 dst[i] = src[i];
375
376 u128_to_be128(&ctrblocks[i], &ctrblk);
377 u128_inc(&ctrblk);
378 }
379
380 serpent_enc_blk_xway_xor(ctx, (u8 *)dst,
381 (u8 *)ctrblocks);
382
383 src += SERPENT_PARALLEL_BLOCKS;
384 dst += SERPENT_PARALLEL_BLOCKS;
385 nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
386 } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
387
388 if (nbytes < bsize)
389 goto done;
390 }
391
392 /* Handle leftovers */
393 do {
394 if (dst != src)
395 *dst = *src;
396
397 u128_to_be128(&ctrblocks[0], &ctrblk);
398 u128_inc(&ctrblk);
399
400 __serpent_encrypt(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks);
401 u128_xor(dst, dst, (u128 *)ctrblocks);
402
403 src += 1;
404 dst += 1;
405 nbytes -= bsize;
406 } while (nbytes >= bsize);
407
408done:
409 u128_to_be128((be128 *)walk->iv, &ctrblk);
410 return nbytes;
411}
412
413static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
414 struct scatterlist *src, unsigned int nbytes)
415{
416 bool fpu_enabled = false;
417 struct blkcipher_walk walk;
418 int err;
419
420 blkcipher_walk_init(&walk, dst, src, nbytes);
421 err = blkcipher_walk_virt_block(desc, &walk, SERPENT_BLOCK_SIZE);
422 desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
423
424 while ((nbytes = walk.nbytes) >= SERPENT_BLOCK_SIZE) {
425 fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
426 nbytes = __ctr_crypt(desc, &walk);
427 err = blkcipher_walk_done(desc, &walk, nbytes);
428 }
429
430 serpent_fpu_end(fpu_enabled);
431
432 if (walk.nbytes) {
433 ctr_crypt_final(desc, &walk);
434 err = blkcipher_walk_done(desc, &walk, 0);
435 }
436
437 return err;
438}
439
440static struct crypto_alg blk_ctr_alg = {
441 .cra_name = "__ctr-serpent-sse2",
442 .cra_driver_name = "__driver-ctr-serpent-sse2",
443 .cra_priority = 0,
444 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
445 .cra_blocksize = 1,
446 .cra_ctxsize = sizeof(struct serpent_ctx),
447 .cra_alignmask = 0,
448 .cra_type = &crypto_blkcipher_type,
449 .cra_module = THIS_MODULE,
450 .cra_list = LIST_HEAD_INIT(blk_ctr_alg.cra_list),
451 .cra_u = {
452 .blkcipher = {
453 .min_keysize = SERPENT_MIN_KEY_SIZE,
454 .max_keysize = SERPENT_MAX_KEY_SIZE,
455 .ivsize = SERPENT_BLOCK_SIZE,
456 .setkey = serpent_setkey,
457 .encrypt = ctr_crypt,
458 .decrypt = ctr_crypt,
459 },
460 },
461};
462
463static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
464 unsigned int key_len)
465{
466 struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
467 struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
468 int err;
469
470 crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
471 crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
472 & CRYPTO_TFM_REQ_MASK);
473 err = crypto_ablkcipher_setkey(child, key, key_len);
474 crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
475 & CRYPTO_TFM_RES_MASK);
476 return err;
477}
478
479static int __ablk_encrypt(struct ablkcipher_request *req)
480{
481 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
482 struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
483 struct blkcipher_desc desc;
484
485 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
486 desc.info = req->info;
487 desc.flags = 0;
488
489 return crypto_blkcipher_crt(desc.tfm)->encrypt(
490 &desc, req->dst, req->src, req->nbytes);
491}
492
493static int ablk_encrypt(struct ablkcipher_request *req)
494{
495 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
496 struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
497
498 if (!irq_fpu_usable()) {
499 struct ablkcipher_request *cryptd_req =
500 ablkcipher_request_ctx(req);
501
502 memcpy(cryptd_req, req, sizeof(*req));
503 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
504
505 return crypto_ablkcipher_encrypt(cryptd_req);
506 } else {
507 return __ablk_encrypt(req);
508 }
509}
510
511static int ablk_decrypt(struct ablkcipher_request *req)
512{
513 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
514 struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
515
516 if (!irq_fpu_usable()) {
517 struct ablkcipher_request *cryptd_req =
518 ablkcipher_request_ctx(req);
519
520 memcpy(cryptd_req, req, sizeof(*req));
521 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
522
523 return crypto_ablkcipher_decrypt(cryptd_req);
524 } else {
525 struct blkcipher_desc desc;
526
527 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
528 desc.info = req->info;
529 desc.flags = 0;
530
531 return crypto_blkcipher_crt(desc.tfm)->decrypt(
532 &desc, req->dst, req->src, req->nbytes);
533 }
534}
535
536static void ablk_exit(struct crypto_tfm *tfm)
537{
538 struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm);
539
540 cryptd_free_ablkcipher(ctx->cryptd_tfm);
541}
542
543static void ablk_init_common(struct crypto_tfm *tfm,
544 struct cryptd_ablkcipher *cryptd_tfm)
545{
546 struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm);
547
548 ctx->cryptd_tfm = cryptd_tfm;
549 tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
550 crypto_ablkcipher_reqsize(&cryptd_tfm->base);
551}
552
553static int ablk_ecb_init(struct crypto_tfm *tfm)
554{
555 struct cryptd_ablkcipher *cryptd_tfm;
556
557 cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-serpent-sse2", 0, 0);
558 if (IS_ERR(cryptd_tfm))
559 return PTR_ERR(cryptd_tfm);
560 ablk_init_common(tfm, cryptd_tfm);
561 return 0;
562}
563
564static struct crypto_alg ablk_ecb_alg = {
565 .cra_name = "ecb(serpent)",
566 .cra_driver_name = "ecb-serpent-sse2",
567 .cra_priority = 400,
568 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
569 .cra_blocksize = SERPENT_BLOCK_SIZE,
570 .cra_ctxsize = sizeof(struct async_serpent_ctx),
571 .cra_alignmask = 0,
572 .cra_type = &crypto_ablkcipher_type,
573 .cra_module = THIS_MODULE,
574 .cra_list = LIST_HEAD_INIT(ablk_ecb_alg.cra_list),
575 .cra_init = ablk_ecb_init,
576 .cra_exit = ablk_exit,
577 .cra_u = {
578 .ablkcipher = {
579 .min_keysize = SERPENT_MIN_KEY_SIZE,
580 .max_keysize = SERPENT_MAX_KEY_SIZE,
581 .setkey = ablk_set_key,
582 .encrypt = ablk_encrypt,
583 .decrypt = ablk_decrypt,
584 },
585 },
586};
587
588static int ablk_cbc_init(struct crypto_tfm *tfm)
589{
590 struct cryptd_ablkcipher *cryptd_tfm;
591
592 cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-serpent-sse2", 0, 0);
593 if (IS_ERR(cryptd_tfm))
594 return PTR_ERR(cryptd_tfm);
595 ablk_init_common(tfm, cryptd_tfm);
596 return 0;
597}
598
599static struct crypto_alg ablk_cbc_alg = {
600 .cra_name = "cbc(serpent)",
601 .cra_driver_name = "cbc-serpent-sse2",
602 .cra_priority = 400,
603 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
604 .cra_blocksize = SERPENT_BLOCK_SIZE,
605 .cra_ctxsize = sizeof(struct async_serpent_ctx),
606 .cra_alignmask = 0,
607 .cra_type = &crypto_ablkcipher_type,
608 .cra_module = THIS_MODULE,
609 .cra_list = LIST_HEAD_INIT(ablk_cbc_alg.cra_list),
610 .cra_init = ablk_cbc_init,
611 .cra_exit = ablk_exit,
612 .cra_u = {
613 .ablkcipher = {
614 .min_keysize = SERPENT_MIN_KEY_SIZE,
615 .max_keysize = SERPENT_MAX_KEY_SIZE,
616 .ivsize = SERPENT_BLOCK_SIZE,
617 .setkey = ablk_set_key,
618 .encrypt = __ablk_encrypt,
619 .decrypt = ablk_decrypt,
620 },
621 },
622};
623
624static int ablk_ctr_init(struct crypto_tfm *tfm)
625{
626 struct cryptd_ablkcipher *cryptd_tfm;
627
628 cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ctr-serpent-sse2", 0, 0);
629 if (IS_ERR(cryptd_tfm))
630 return PTR_ERR(cryptd_tfm);
631 ablk_init_common(tfm, cryptd_tfm);
632 return 0;
633}
634
635static struct crypto_alg ablk_ctr_alg = {
636 .cra_name = "ctr(serpent)",
637 .cra_driver_name = "ctr-serpent-sse2",
638 .cra_priority = 400,
639 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
640 .cra_blocksize = 1,
641 .cra_ctxsize = sizeof(struct async_serpent_ctx),
642 .cra_alignmask = 0,
643 .cra_type = &crypto_ablkcipher_type,
644 .cra_module = THIS_MODULE,
645 .cra_list = LIST_HEAD_INIT(ablk_ctr_alg.cra_list),
646 .cra_init = ablk_ctr_init,
647 .cra_exit = ablk_exit,
648 .cra_u = {
649 .ablkcipher = {
650 .min_keysize = SERPENT_MIN_KEY_SIZE,
651 .max_keysize = SERPENT_MAX_KEY_SIZE,
652 .ivsize = SERPENT_BLOCK_SIZE,
653 .setkey = ablk_set_key,
654 .encrypt = ablk_encrypt,
655 .decrypt = ablk_encrypt,
656 .geniv = "chainiv",
657 },
658 },
659};
660
661static int __init serpent_sse2_init(void)
662{
663 int err;
664
665 if (!cpu_has_xmm2) {
666 printk(KERN_INFO "SSE2 instructions are not detected.\n");
667 return -ENODEV;
668 }
669
670 err = crypto_register_alg(&blk_ecb_alg);
671 if (err)
672 goto blk_ecb_err;
673 err = crypto_register_alg(&blk_cbc_alg);
674 if (err)
675 goto blk_cbc_err;
676 err = crypto_register_alg(&blk_ctr_alg);
677 if (err)
678 goto blk_ctr_err;
679 err = crypto_register_alg(&ablk_ecb_alg);
680 if (err)
681 goto ablk_ecb_err;
682 err = crypto_register_alg(&ablk_cbc_alg);
683 if (err)
684 goto ablk_cbc_err;
685 err = crypto_register_alg(&ablk_ctr_alg);
686 if (err)
687 goto ablk_ctr_err;
688 return err;
689
690ablk_ctr_err:
691 crypto_unregister_alg(&ablk_cbc_alg);
692ablk_cbc_err:
693 crypto_unregister_alg(&ablk_ecb_alg);
694ablk_ecb_err:
695 crypto_unregister_alg(&blk_ctr_alg);
696blk_ctr_err:
697 crypto_unregister_alg(&blk_cbc_alg);
698blk_cbc_err:
699 crypto_unregister_alg(&blk_ecb_alg);
700blk_ecb_err:
701 return err;
702}
703
704static void __exit serpent_sse2_exit(void)
705{
706 crypto_unregister_alg(&ablk_ctr_alg);
707 crypto_unregister_alg(&ablk_cbc_alg);
708 crypto_unregister_alg(&ablk_ecb_alg);
709 crypto_unregister_alg(&blk_ctr_alg);
710 crypto_unregister_alg(&blk_cbc_alg);
711 crypto_unregister_alg(&blk_ecb_alg);
712}
713
714module_init(serpent_sse2_init);
715module_exit(serpent_sse2_exit);
716
717MODULE_DESCRIPTION("Serpent Cipher Algorithm, SSE2 optimized");
718MODULE_LICENSE("GPL");
719MODULE_ALIAS("serpent");
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-18 10:02:00 -0500