ac7f5cd019e876f44eaaa3330bc9ef87f61b6c3d
[linux-3.10.git] / arch / x86 / crypto / aesni-intel_glue.c
1 /*
2  * Support for Intel AES-NI instructions. This file contains glue
3  * code, the real AES implementation is in intel-aes_asm.S.
4  *
5  * Copyright (C) 2008, Intel Corp.
6  *    Author: Huang Ying <ying.huang@intel.com>
7  *
8  * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
9  * interface for 64-bit kernels.
10  *    Authors: Adrian Hoban <adrian.hoban@intel.com>
11  *             Gabriele Paoloni <gabriele.paoloni@intel.com>
12  *             Tadeusz Struk (tadeusz.struk@intel.com)
13  *             Aidan O'Mahony (aidan.o.mahony@intel.com)
14  *    Copyright (c) 2010, Intel Corporation.
15  *
16  * This program is free software; you can redistribute it and/or modify
17  * it under the terms of the GNU General Public License as published by
18  * the Free Software Foundation; either version 2 of the License, or
19  * (at your option) any later version.
20  */
21
22 #include <linux/hardirq.h>
23 #include <linux/types.h>
24 #include <linux/crypto.h>
25 #include <linux/module.h>
26 #include <linux/err.h>
27 #include <crypto/algapi.h>
28 #include <crypto/aes.h>
29 #include <crypto/cryptd.h>
30 #include <crypto/ctr.h>
31 #include <asm/cpu_device_id.h>
32 #include <asm/i387.h>
33 #include <asm/aes.h>
34 #include <crypto/scatterwalk.h>
35 #include <crypto/internal/aead.h>
36 #include <linux/workqueue.h>
37 #include <linux/spinlock.h>
38
39 #if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
40 #define HAS_CTR
41 #endif
42
43 #if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
44 #define HAS_LRW
45 #endif
46
47 #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
48 #define HAS_PCBC
49 #endif
50
51 #if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
52 #define HAS_XTS
53 #endif
54
55 struct async_aes_ctx {
56         struct cryptd_ablkcipher *cryptd_tfm;
57 };
58
59 /* This data is stored at the end of the crypto_tfm struct.
60  * It's a type of per "session" data storage location.
61  * This needs to be 16 byte aligned.
62  */
63 struct aesni_rfc4106_gcm_ctx {
64         u8 hash_subkey[16];
65         struct crypto_aes_ctx aes_key_expanded;
66         u8 nonce[4];
67         struct cryptd_aead *cryptd_tfm;
68 };
69
70 struct aesni_gcm_set_hash_subkey_result {
71         int err;
72         struct completion completion;
73 };
74
75 struct aesni_hash_subkey_req_data {
76         u8 iv[16];
77         struct aesni_gcm_set_hash_subkey_result result;
78         struct scatterlist sg;
79 };
80
81 #define AESNI_ALIGN     (16)
82 #define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE-1))
83 #define RFC4106_HASH_SUBKEY_SIZE 16
84
85 asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
86                              unsigned int key_len);
87 asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
88                           const u8 *in);
89 asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
90                           const u8 *in);
91 asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
92                               const u8 *in, unsigned int len);
93 asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
94                               const u8 *in, unsigned int len);
95 asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
96                               const u8 *in, unsigned int len, u8 *iv);
97 asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
98                               const u8 *in, unsigned int len, u8 *iv);
99
100 int crypto_fpu_init(void);
101 void crypto_fpu_exit(void);
102
103 #ifdef CONFIG_X86_64
104 asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
105                               const u8 *in, unsigned int len, u8 *iv);
106
107 /* asmlinkage void aesni_gcm_enc()
108  * void *ctx,  AES Key schedule. Starts on a 16 byte boundary.
109  * u8 *out, Ciphertext output. Encrypt in-place is allowed.
110  * const u8 *in, Plaintext input
111  * unsigned long plaintext_len, Length of data in bytes for encryption.
112  * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
113  *         concatenated with 8 byte Initialisation Vector (from IPSec ESP
114  *         Payload) concatenated with 0x00000001. 16-byte aligned pointer.
115  * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
116  * const u8 *aad, Additional Authentication Data (AAD)
117  * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this
118  *          is going to be 8 or 12 bytes
119  * u8 *auth_tag, Authenticated Tag output.
120  * unsigned long auth_tag_len), Authenticated Tag Length in bytes.
121  *          Valid values are 16 (most likely), 12 or 8.
122  */
123 asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
124                         const u8 *in, unsigned long plaintext_len, u8 *iv,
125                         u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
126                         u8 *auth_tag, unsigned long auth_tag_len);
127
128 /* asmlinkage void aesni_gcm_dec()
129  * void *ctx, AES Key schedule. Starts on a 16 byte boundary.
130  * u8 *out, Plaintext output. Decrypt in-place is allowed.
131  * const u8 *in, Ciphertext input
132  * unsigned long ciphertext_len, Length of data in bytes for decryption.
133  * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
134  *         concatenated with 8 byte Initialisation Vector (from IPSec ESP
135  *         Payload) concatenated with 0x00000001. 16-byte aligned pointer.
136  * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
137  * const u8 *aad, Additional Authentication Data (AAD)
138  * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
139  * to be 8 or 12 bytes
140  * u8 *auth_tag, Authenticated Tag output.
141  * unsigned long auth_tag_len) Authenticated Tag Length in bytes.
142  * Valid values are 16 (most likely), 12 or 8.
143  */
144 asmlinkage void aesni_gcm_dec(void *ctx, u8 *out,
145                         const u8 *in, unsigned long ciphertext_len, u8 *iv,
146                         u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
147                         u8 *auth_tag, unsigned long auth_tag_len);
148
149 static inline struct
150 aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
151 {
152         return
153                 (struct aesni_rfc4106_gcm_ctx *)
154                 PTR_ALIGN((u8 *)
155                 crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_ALIGN);
156 }
157 #endif
158
159 static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
160 {
161         unsigned long addr = (unsigned long)raw_ctx;
162         unsigned long align = AESNI_ALIGN;
163
164         if (align <= crypto_tfm_ctx_alignment())
165                 align = 1;
166         return (struct crypto_aes_ctx *)ALIGN(addr, align);
167 }
168
169 static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
170                               const u8 *in_key, unsigned int key_len)
171 {
172         struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
173         u32 *flags = &tfm->crt_flags;
174         int err;
175
176         if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
177             key_len != AES_KEYSIZE_256) {
178                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
179                 return -EINVAL;
180         }
181
182         if (!irq_fpu_usable())
183                 err = crypto_aes_expand_key(ctx, in_key, key_len);
184         else {
185                 kernel_fpu_begin();
186                 err = aesni_set_key(ctx, in_key, key_len);
187                 kernel_fpu_end();
188         }
189
190         return err;
191 }
192
193 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
194                        unsigned int key_len)
195 {
196         return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
197 }
198
199 static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
200 {
201         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
202
203         if (!irq_fpu_usable())
204                 crypto_aes_encrypt_x86(ctx, dst, src);
205         else {
206                 kernel_fpu_begin();
207                 aesni_enc(ctx, dst, src);
208                 kernel_fpu_end();
209         }
210 }
211
212 static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
213 {
214         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
215
216         if (!irq_fpu_usable())
217                 crypto_aes_decrypt_x86(ctx, dst, src);
218         else {
219                 kernel_fpu_begin();
220                 aesni_dec(ctx, dst, src);
221                 kernel_fpu_end();
222         }
223 }
224
225 static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
226 {
227         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
228
229         aesni_enc(ctx, dst, src);
230 }
231
232 static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
233 {
234         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
235
236         aesni_dec(ctx, dst, src);
237 }
238
239 static int ecb_encrypt(struct blkcipher_desc *desc,
240                        struct scatterlist *dst, struct scatterlist *src,
241                        unsigned int nbytes)
242 {
243         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
244         struct blkcipher_walk walk;
245         int err;
246
247         blkcipher_walk_init(&walk, dst, src, nbytes);
248         err = blkcipher_walk_virt(desc, &walk);
249         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
250
251         kernel_fpu_begin();
252         while ((nbytes = walk.nbytes)) {
253                 aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
254                               nbytes & AES_BLOCK_MASK);
255                 nbytes &= AES_BLOCK_SIZE - 1;
256                 err = blkcipher_walk_done(desc, &walk, nbytes);
257         }
258         kernel_fpu_end();
259
260         return err;
261 }
262
263 static int ecb_decrypt(struct blkcipher_desc *desc,
264                        struct scatterlist *dst, struct scatterlist *src,
265                        unsigned int nbytes)
266 {
267         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
268         struct blkcipher_walk walk;
269         int err;
270
271         blkcipher_walk_init(&walk, dst, src, nbytes);
272         err = blkcipher_walk_virt(desc, &walk);
273         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
274
275         kernel_fpu_begin();
276         while ((nbytes = walk.nbytes)) {
277                 aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
278                               nbytes & AES_BLOCK_MASK);
279                 nbytes &= AES_BLOCK_SIZE - 1;
280                 err = blkcipher_walk_done(desc, &walk, nbytes);
281         }
282         kernel_fpu_end();
283
284         return err;
285 }
286
287 static int cbc_encrypt(struct blkcipher_desc *desc,
288                        struct scatterlist *dst, struct scatterlist *src,
289                        unsigned int nbytes)
290 {
291         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
292         struct blkcipher_walk walk;
293         int err;
294
295         blkcipher_walk_init(&walk, dst, src, nbytes);
296         err = blkcipher_walk_virt(desc, &walk);
297         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
298
299         kernel_fpu_begin();
300         while ((nbytes = walk.nbytes)) {
301                 aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
302                               nbytes & AES_BLOCK_MASK, walk.iv);
303                 nbytes &= AES_BLOCK_SIZE - 1;
304                 err = blkcipher_walk_done(desc, &walk, nbytes);
305         }
306         kernel_fpu_end();
307
308         return err;
309 }
310
311 static int cbc_decrypt(struct blkcipher_desc *desc,
312                        struct scatterlist *dst, struct scatterlist *src,
313                        unsigned int nbytes)
314 {
315         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
316         struct blkcipher_walk walk;
317         int err;
318
319         blkcipher_walk_init(&walk, dst, src, nbytes);
320         err = blkcipher_walk_virt(desc, &walk);
321         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
322
323         kernel_fpu_begin();
324         while ((nbytes = walk.nbytes)) {
325                 aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
326                               nbytes & AES_BLOCK_MASK, walk.iv);
327                 nbytes &= AES_BLOCK_SIZE - 1;
328                 err = blkcipher_walk_done(desc, &walk, nbytes);
329         }
330         kernel_fpu_end();
331
332         return err;
333 }
334
335 #ifdef CONFIG_X86_64
336 static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
337                             struct blkcipher_walk *walk)
338 {
339         u8 *ctrblk = walk->iv;
340         u8 keystream[AES_BLOCK_SIZE];
341         u8 *src = walk->src.virt.addr;
342         u8 *dst = walk->dst.virt.addr;
343         unsigned int nbytes = walk->nbytes;
344
345         aesni_enc(ctx, keystream, ctrblk);
346         crypto_xor(keystream, src, nbytes);
347         memcpy(dst, keystream, nbytes);
348         crypto_inc(ctrblk, AES_BLOCK_SIZE);
349 }
350
351 static int ctr_crypt(struct blkcipher_desc *desc,
352                      struct scatterlist *dst, struct scatterlist *src,
353                      unsigned int nbytes)
354 {
355         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
356         struct blkcipher_walk walk;
357         int err;
358
359         blkcipher_walk_init(&walk, dst, src, nbytes);
360         err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
361         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
362
363         kernel_fpu_begin();
364         while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
365                 aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
366                               nbytes & AES_BLOCK_MASK, walk.iv);
367                 nbytes &= AES_BLOCK_SIZE - 1;
368                 err = blkcipher_walk_done(desc, &walk, nbytes);
369         }
370         if (walk.nbytes) {
371                 ctr_crypt_final(ctx, &walk);
372                 err = blkcipher_walk_done(desc, &walk, 0);
373         }
374         kernel_fpu_end();
375
376         return err;
377 }
378 #endif
379
380 static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
381                         unsigned int key_len)
382 {
383         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
384         struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
385         int err;
386
387         crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
388         crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
389                                     & CRYPTO_TFM_REQ_MASK);
390         err = crypto_ablkcipher_setkey(child, key, key_len);
391         crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
392                                     & CRYPTO_TFM_RES_MASK);
393         return err;
394 }
395
396 static int ablk_encrypt(struct ablkcipher_request *req)
397 {
398         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
399         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
400
401         if (!irq_fpu_usable()) {
402                 struct ablkcipher_request *cryptd_req =
403                         ablkcipher_request_ctx(req);
404                 memcpy(cryptd_req, req, sizeof(*req));
405                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
406                 return crypto_ablkcipher_encrypt(cryptd_req);
407         } else {
408                 struct blkcipher_desc desc;
409                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
410                 desc.info = req->info;
411                 desc.flags = 0;
412                 return crypto_blkcipher_crt(desc.tfm)->encrypt(
413                         &desc, req->dst, req->src, req->nbytes);
414         }
415 }
416
417 static int ablk_decrypt(struct ablkcipher_request *req)
418 {
419         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
420         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
421
422         if (!irq_fpu_usable()) {
423                 struct ablkcipher_request *cryptd_req =
424                         ablkcipher_request_ctx(req);
425                 memcpy(cryptd_req, req, sizeof(*req));
426                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
427                 return crypto_ablkcipher_decrypt(cryptd_req);
428         } else {
429                 struct blkcipher_desc desc;
430                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
431                 desc.info = req->info;
432                 desc.flags = 0;
433                 return crypto_blkcipher_crt(desc.tfm)->decrypt(
434                         &desc, req->dst, req->src, req->nbytes);
435         }
436 }
437
438 static void ablk_exit(struct crypto_tfm *tfm)
439 {
440         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
441
442         cryptd_free_ablkcipher(ctx->cryptd_tfm);
443 }
444
445 static int ablk_init_common(struct crypto_tfm *tfm, const char *drv_name)
446 {
447         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
448         struct cryptd_ablkcipher *cryptd_tfm;
449
450         cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0);
451         if (IS_ERR(cryptd_tfm))
452                 return PTR_ERR(cryptd_tfm);
453
454         ctx->cryptd_tfm = cryptd_tfm;
455         tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
456                 crypto_ablkcipher_reqsize(&cryptd_tfm->base);
457
458         return 0;
459 }
460
461 static int ablk_ecb_init(struct crypto_tfm *tfm)
462 {
463         return ablk_init_common(tfm, "__driver-ecb-aes-aesni");
464 }
465
466 static int ablk_cbc_init(struct crypto_tfm *tfm)
467 {
468         return ablk_init_common(tfm, "__driver-cbc-aes-aesni");
469 }
470
471 #ifdef CONFIG_X86_64
472 static int ablk_ctr_init(struct crypto_tfm *tfm)
473 {
474         return ablk_init_common(tfm, "__driver-ctr-aes-aesni");
475 }
476
477 #ifdef HAS_CTR
478 static int ablk_rfc3686_ctr_init(struct crypto_tfm *tfm)
479 {
480         return ablk_init_common(tfm, "rfc3686(__driver-ctr-aes-aesni)");
481 }
482 #endif
483 #endif
484
485 #ifdef HAS_LRW
486 static int ablk_lrw_init(struct crypto_tfm *tfm)
487 {
488         return ablk_init_common(tfm, "fpu(lrw(__driver-aes-aesni))");
489 }
490 #endif
491
492 #ifdef HAS_PCBC
493 static int ablk_pcbc_init(struct crypto_tfm *tfm)
494 {
495         return ablk_init_common(tfm, "fpu(pcbc(__driver-aes-aesni))");
496 }
497 #endif
498
499 #ifdef HAS_XTS
500 static int ablk_xts_init(struct crypto_tfm *tfm)
501 {
502         return ablk_init_common(tfm, "fpu(xts(__driver-aes-aesni))");
503 }
504 #endif
505
506 #ifdef CONFIG_X86_64
507 static int rfc4106_init(struct crypto_tfm *tfm)
508 {
509         struct cryptd_aead *cryptd_tfm;
510         struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *)
511                 PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
512         struct crypto_aead *cryptd_child;
513         struct aesni_rfc4106_gcm_ctx *child_ctx;
514         cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0);
515         if (IS_ERR(cryptd_tfm))
516                 return PTR_ERR(cryptd_tfm);
517
518         cryptd_child = cryptd_aead_child(cryptd_tfm);
519         child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child);
520         memcpy(child_ctx, ctx, sizeof(*ctx));
521         ctx->cryptd_tfm = cryptd_tfm;
522         tfm->crt_aead.reqsize = sizeof(struct aead_request)
523                 + crypto_aead_reqsize(&cryptd_tfm->base);
524         return 0;
525 }
526
527 static void rfc4106_exit(struct crypto_tfm *tfm)
528 {
529         struct aesni_rfc4106_gcm_ctx *ctx =
530                 (struct aesni_rfc4106_gcm_ctx *)
531                 PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
532         if (!IS_ERR(ctx->cryptd_tfm))
533                 cryptd_free_aead(ctx->cryptd_tfm);
534         return;
535 }
536
537 static void
538 rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err)
539 {
540         struct aesni_gcm_set_hash_subkey_result *result = req->data;
541
542         if (err == -EINPROGRESS)
543                 return;
544         result->err = err;
545         complete(&result->completion);
546 }
547
548 static int
549 rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
550 {
551         struct crypto_ablkcipher *ctr_tfm;
552         struct ablkcipher_request *req;
553         int ret = -EINVAL;
554         struct aesni_hash_subkey_req_data *req_data;
555
556         ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0);
557         if (IS_ERR(ctr_tfm))
558                 return PTR_ERR(ctr_tfm);
559
560         crypto_ablkcipher_clear_flags(ctr_tfm, ~0);
561
562         ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len);
563         if (ret)
564                 goto out_free_ablkcipher;
565
566         ret = -ENOMEM;
567         req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
568         if (!req)
569                 goto out_free_ablkcipher;
570
571         req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
572         if (!req_data)
573                 goto out_free_request;
574
575         memset(req_data->iv, 0, sizeof(req_data->iv));
576
577         /* Clear the data in the hash sub key container to zero.*/
578         /* We want to cipher all zeros to create the hash sub key. */
579         memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);
580
581         init_completion(&req_data->result.completion);
582         sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE);
583         ablkcipher_request_set_tfm(req, ctr_tfm);
584         ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP |
585                                         CRYPTO_TFM_REQ_MAY_BACKLOG,
586                                         rfc4106_set_hash_subkey_done,
587                                         &req_data->result);
588
589         ablkcipher_request_set_crypt(req, &req_data->sg,
590                 &req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv);
591
592         ret = crypto_ablkcipher_encrypt(req);
593         if (ret == -EINPROGRESS || ret == -EBUSY) {
594                 ret = wait_for_completion_interruptible
595                         (&req_data->result.completion);
596                 if (!ret)
597                         ret = req_data->result.err;
598         }
599         kfree(req_data);
600 out_free_request:
601         ablkcipher_request_free(req);
602 out_free_ablkcipher:
603         crypto_free_ablkcipher(ctr_tfm);
604         return ret;
605 }
606
607 static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
608                                                    unsigned int key_len)
609 {
610         int ret = 0;
611         struct crypto_tfm *tfm = crypto_aead_tfm(parent);
612         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
613         struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
614         struct aesni_rfc4106_gcm_ctx *child_ctx =
615                                  aesni_rfc4106_gcm_ctx_get(cryptd_child);
616         u8 *new_key_mem = NULL;
617
618         if (key_len < 4) {
619                 crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
620                 return -EINVAL;
621         }
622         /*Account for 4 byte nonce at the end.*/
623         key_len -= 4;
624         if (key_len != AES_KEYSIZE_128) {
625                 crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
626                 return -EINVAL;
627         }
628
629         memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
630         /*This must be on a 16 byte boundary!*/
631         if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN)
632                 return -EINVAL;
633
634         if ((unsigned long)key % AESNI_ALIGN) {
635                 /*key is not aligned: use an auxuliar aligned pointer*/
636                 new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL);
637                 if (!new_key_mem)
638                         return -ENOMEM;
639
640                 new_key_mem = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
641                 memcpy(new_key_mem, key, key_len);
642                 key = new_key_mem;
643         }
644
645         if (!irq_fpu_usable())
646                 ret = crypto_aes_expand_key(&(ctx->aes_key_expanded),
647                 key, key_len);
648         else {
649                 kernel_fpu_begin();
650                 ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len);
651                 kernel_fpu_end();
652         }
653         /*This must be on a 16 byte boundary!*/
654         if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) {
655                 ret = -EINVAL;
656                 goto exit;
657         }
658         ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
659         memcpy(child_ctx, ctx, sizeof(*ctx));
660 exit:
661         kfree(new_key_mem);
662         return ret;
663 }
664
665 /* This is the Integrity Check Value (aka the authentication tag length and can
666  * be 8, 12 or 16 bytes long. */
667 static int rfc4106_set_authsize(struct crypto_aead *parent,
668                                 unsigned int authsize)
669 {
670         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
671         struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
672
673         switch (authsize) {
674         case 8:
675         case 12:
676         case 16:
677                 break;
678         default:
679                 return -EINVAL;
680         }
681         crypto_aead_crt(parent)->authsize = authsize;
682         crypto_aead_crt(cryptd_child)->authsize = authsize;
683         return 0;
684 }
685
686 static int rfc4106_encrypt(struct aead_request *req)
687 {
688         int ret;
689         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
690         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
691
692         if (!irq_fpu_usable()) {
693                 struct aead_request *cryptd_req =
694                         (struct aead_request *) aead_request_ctx(req);
695                 memcpy(cryptd_req, req, sizeof(*req));
696                 aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
697                 return crypto_aead_encrypt(cryptd_req);
698         } else {
699                 struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
700                 kernel_fpu_begin();
701                 ret = cryptd_child->base.crt_aead.encrypt(req);
702                 kernel_fpu_end();
703                 return ret;
704         }
705 }
706
707 static int rfc4106_decrypt(struct aead_request *req)
708 {
709         int ret;
710         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
711         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
712
713         if (!irq_fpu_usable()) {
714                 struct aead_request *cryptd_req =
715                         (struct aead_request *) aead_request_ctx(req);
716                 memcpy(cryptd_req, req, sizeof(*req));
717                 aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
718                 return crypto_aead_decrypt(cryptd_req);
719         } else {
720                 struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
721                 kernel_fpu_begin();
722                 ret = cryptd_child->base.crt_aead.decrypt(req);
723                 kernel_fpu_end();
724                 return ret;
725         }
726 }
727
728 static int __driver_rfc4106_encrypt(struct aead_request *req)
729 {
730         u8 one_entry_in_sg = 0;
731         u8 *src, *dst, *assoc;
732         __be32 counter = cpu_to_be32(1);
733         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
734         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
735         void *aes_ctx = &(ctx->aes_key_expanded);
736         unsigned long auth_tag_len = crypto_aead_authsize(tfm);
737         u8 iv_tab[16+AESNI_ALIGN];
738         u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN);
739         struct scatter_walk src_sg_walk;
740         struct scatter_walk assoc_sg_walk;
741         struct scatter_walk dst_sg_walk;
742         unsigned int i;
743
744         /* Assuming we are supporting rfc4106 64-bit extended */
745         /* sequence numbers We need to have the AAD length equal */
746         /* to 8 or 12 bytes */
747         if (unlikely(req->assoclen != 8 && req->assoclen != 12))
748                 return -EINVAL;
749         /* IV below built */
750         for (i = 0; i < 4; i++)
751                 *(iv+i) = ctx->nonce[i];
752         for (i = 0; i < 8; i++)
753                 *(iv+4+i) = req->iv[i];
754         *((__be32 *)(iv+12)) = counter;
755
756         if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
757                 one_entry_in_sg = 1;
758                 scatterwalk_start(&src_sg_walk, req->src);
759                 scatterwalk_start(&assoc_sg_walk, req->assoc);
760                 src = scatterwalk_map(&src_sg_walk);
761                 assoc = scatterwalk_map(&assoc_sg_walk);
762                 dst = src;
763                 if (unlikely(req->src != req->dst)) {
764                         scatterwalk_start(&dst_sg_walk, req->dst);
765                         dst = scatterwalk_map(&dst_sg_walk);
766                 }
767
768         } else {
769                 /* Allocate memory for src, dst, assoc */
770                 src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
771                         GFP_ATOMIC);
772                 if (unlikely(!src))
773                         return -ENOMEM;
774                 assoc = (src + req->cryptlen + auth_tag_len);
775                 scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
776                 scatterwalk_map_and_copy(assoc, req->assoc, 0,
777                                         req->assoclen, 0);
778                 dst = src;
779         }
780
781         aesni_gcm_enc(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv,
782                 ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst
783                 + ((unsigned long)req->cryptlen), auth_tag_len);
784
785         /* The authTag (aka the Integrity Check Value) needs to be written
786          * back to the packet. */
787         if (one_entry_in_sg) {
788                 if (unlikely(req->src != req->dst)) {
789                         scatterwalk_unmap(dst);
790                         scatterwalk_done(&dst_sg_walk, 0, 0);
791                 }
792                 scatterwalk_unmap(src);
793                 scatterwalk_unmap(assoc);
794                 scatterwalk_done(&src_sg_walk, 0, 0);
795                 scatterwalk_done(&assoc_sg_walk, 0, 0);
796         } else {
797                 scatterwalk_map_and_copy(dst, req->dst, 0,
798                         req->cryptlen + auth_tag_len, 1);
799                 kfree(src);
800         }
801         return 0;
802 }
803
804 static int __driver_rfc4106_decrypt(struct aead_request *req)
805 {
806         u8 one_entry_in_sg = 0;
807         u8 *src, *dst, *assoc;
808         unsigned long tempCipherLen = 0;
809         __be32 counter = cpu_to_be32(1);
810         int retval = 0;
811         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
812         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
813         void *aes_ctx = &(ctx->aes_key_expanded);
814         unsigned long auth_tag_len = crypto_aead_authsize(tfm);
815         u8 iv_and_authTag[32+AESNI_ALIGN];
816         u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN);
817         u8 *authTag = iv + 16;
818         struct scatter_walk src_sg_walk;
819         struct scatter_walk assoc_sg_walk;
820         struct scatter_walk dst_sg_walk;
821         unsigned int i;
822
823         if (unlikely((req->cryptlen < auth_tag_len) ||
824                 (req->assoclen != 8 && req->assoclen != 12)))
825                 return -EINVAL;
826         /* Assuming we are supporting rfc4106 64-bit extended */
827         /* sequence numbers We need to have the AAD length */
828         /* equal to 8 or 12 bytes */
829
830         tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
831         /* IV below built */
832         for (i = 0; i < 4; i++)
833                 *(iv+i) = ctx->nonce[i];
834         for (i = 0; i < 8; i++)
835                 *(iv+4+i) = req->iv[i];
836         *((__be32 *)(iv+12)) = counter;
837
838         if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
839                 one_entry_in_sg = 1;
840                 scatterwalk_start(&src_sg_walk, req->src);
841                 scatterwalk_start(&assoc_sg_walk, req->assoc);
842                 src = scatterwalk_map(&src_sg_walk);
843                 assoc = scatterwalk_map(&assoc_sg_walk);
844                 dst = src;
845                 if (unlikely(req->src != req->dst)) {
846                         scatterwalk_start(&dst_sg_walk, req->dst);
847                         dst = scatterwalk_map(&dst_sg_walk);
848                 }
849
850         } else {
851                 /* Allocate memory for src, dst, assoc */
852                 src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
853                 if (!src)
854                         return -ENOMEM;
855                 assoc = (src + req->cryptlen + auth_tag_len);
856                 scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
857                 scatterwalk_map_and_copy(assoc, req->assoc, 0,
858                         req->assoclen, 0);
859                 dst = src;
860         }
861
862         aesni_gcm_dec(aes_ctx, dst, src, tempCipherLen, iv,
863                 ctx->hash_subkey, assoc, (unsigned long)req->assoclen,
864                 authTag, auth_tag_len);
865
866         /* Compare generated tag with passed in tag. */
867         retval = memcmp(src + tempCipherLen, authTag, auth_tag_len) ?
868                 -EBADMSG : 0;
869
870         if (one_entry_in_sg) {
871                 if (unlikely(req->src != req->dst)) {
872                         scatterwalk_unmap(dst);
873                         scatterwalk_done(&dst_sg_walk, 0, 0);
874                 }
875                 scatterwalk_unmap(src);
876                 scatterwalk_unmap(assoc);
877                 scatterwalk_done(&src_sg_walk, 0, 0);
878                 scatterwalk_done(&assoc_sg_walk, 0, 0);
879         } else {
880                 scatterwalk_map_and_copy(dst, req->dst, 0, req->cryptlen, 1);
881                 kfree(src);
882         }
883         return retval;
884 }
885 #endif
886
887 static struct crypto_alg aesni_algs[] = { {
888         .cra_name               = "aes",
889         .cra_driver_name        = "aes-aesni",
890         .cra_priority           = 300,
891         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
892         .cra_blocksize          = AES_BLOCK_SIZE,
893         .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
894                                   AESNI_ALIGN - 1,
895         .cra_alignmask          = 0,
896         .cra_module             = THIS_MODULE,
897         .cra_u  = {
898                 .cipher = {
899                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
900                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
901                         .cia_setkey             = aes_set_key,
902                         .cia_encrypt            = aes_encrypt,
903                         .cia_decrypt            = aes_decrypt
904                 }
905         }
906 }, {
907         .cra_name               = "__aes-aesni",
908         .cra_driver_name        = "__driver-aes-aesni",
909         .cra_priority           = 0,
910         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
911         .cra_blocksize          = AES_BLOCK_SIZE,
912         .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
913                                   AESNI_ALIGN - 1,
914         .cra_alignmask          = 0,
915         .cra_module             = THIS_MODULE,
916         .cra_u  = {
917                 .cipher = {
918                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
919                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
920                         .cia_setkey             = aes_set_key,
921                         .cia_encrypt            = __aes_encrypt,
922                         .cia_decrypt            = __aes_decrypt
923                 }
924         }
925 }, {
926         .cra_name               = "__ecb-aes-aesni",
927         .cra_driver_name        = "__driver-ecb-aes-aesni",
928         .cra_priority           = 0,
929         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
930         .cra_blocksize          = AES_BLOCK_SIZE,
931         .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
932                                   AESNI_ALIGN - 1,
933         .cra_alignmask          = 0,
934         .cra_type               = &crypto_blkcipher_type,
935         .cra_module             = THIS_MODULE,
936         .cra_u = {
937                 .blkcipher = {
938                         .min_keysize    = AES_MIN_KEY_SIZE,
939                         .max_keysize    = AES_MAX_KEY_SIZE,
940                         .setkey         = aes_set_key,
941                         .encrypt        = ecb_encrypt,
942                         .decrypt        = ecb_decrypt,
943                 },
944         },
945 }, {
946         .cra_name               = "__cbc-aes-aesni",
947         .cra_driver_name        = "__driver-cbc-aes-aesni",
948         .cra_priority           = 0,
949         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
950         .cra_blocksize          = AES_BLOCK_SIZE,
951         .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
952                                   AESNI_ALIGN - 1,
953         .cra_alignmask          = 0,
954         .cra_type               = &crypto_blkcipher_type,
955         .cra_module             = THIS_MODULE,
956         .cra_u = {
957                 .blkcipher = {
958                         .min_keysize    = AES_MIN_KEY_SIZE,
959                         .max_keysize    = AES_MAX_KEY_SIZE,
960                         .setkey         = aes_set_key,
961                         .encrypt        = cbc_encrypt,
962                         .decrypt        = cbc_decrypt,
963                 },
964         },
965 }, {
966         .cra_name               = "ecb(aes)",
967         .cra_driver_name        = "ecb-aes-aesni",
968         .cra_priority           = 400,
969         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
970         .cra_blocksize          = AES_BLOCK_SIZE,
971         .cra_ctxsize            = sizeof(struct async_aes_ctx),
972         .cra_alignmask          = 0,
973         .cra_type               = &crypto_ablkcipher_type,
974         .cra_module             = THIS_MODULE,
975         .cra_init               = ablk_ecb_init,
976         .cra_exit               = ablk_exit,
977         .cra_u = {
978                 .ablkcipher = {
979                         .min_keysize    = AES_MIN_KEY_SIZE,
980                         .max_keysize    = AES_MAX_KEY_SIZE,
981                         .setkey         = ablk_set_key,
982                         .encrypt        = ablk_encrypt,
983                         .decrypt        = ablk_decrypt,
984                 },
985         },
986 }, {
987         .cra_name               = "cbc(aes)",
988         .cra_driver_name        = "cbc-aes-aesni",
989         .cra_priority           = 400,
990         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
991         .cra_blocksize          = AES_BLOCK_SIZE,
992         .cra_ctxsize            = sizeof(struct async_aes_ctx),
993         .cra_alignmask          = 0,
994         .cra_type               = &crypto_ablkcipher_type,
995         .cra_module             = THIS_MODULE,
996         .cra_init               = ablk_cbc_init,
997         .cra_exit               = ablk_exit,
998         .cra_u = {
999                 .ablkcipher = {
1000                         .min_keysize    = AES_MIN_KEY_SIZE,
1001                         .max_keysize    = AES_MAX_KEY_SIZE,
1002                         .ivsize         = AES_BLOCK_SIZE,
1003                         .setkey         = ablk_set_key,
1004                         .encrypt        = ablk_encrypt,
1005                         .decrypt        = ablk_decrypt,
1006                 },
1007         },
1008 #ifdef CONFIG_X86_64
1009 }, {
1010         .cra_name               = "__ctr-aes-aesni",
1011         .cra_driver_name        = "__driver-ctr-aes-aesni",
1012         .cra_priority           = 0,
1013         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
1014         .cra_blocksize          = 1,
1015         .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
1016                                   AESNI_ALIGN - 1,
1017         .cra_alignmask          = 0,
1018         .cra_type               = &crypto_blkcipher_type,
1019         .cra_module             = THIS_MODULE,
1020         .cra_u = {
1021                 .blkcipher = {
1022                         .min_keysize    = AES_MIN_KEY_SIZE,
1023                         .max_keysize    = AES_MAX_KEY_SIZE,
1024                         .ivsize         = AES_BLOCK_SIZE,
1025                         .setkey         = aes_set_key,
1026                         .encrypt        = ctr_crypt,
1027                         .decrypt        = ctr_crypt,
1028                 },
1029         },
1030 }, {
1031         .cra_name               = "ctr(aes)",
1032         .cra_driver_name        = "ctr-aes-aesni",
1033         .cra_priority           = 400,
1034         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1035         .cra_blocksize          = 1,
1036         .cra_ctxsize            = sizeof(struct async_aes_ctx),
1037         .cra_alignmask          = 0,
1038         .cra_type               = &crypto_ablkcipher_type,
1039         .cra_module             = THIS_MODULE,
1040         .cra_init               = ablk_ctr_init,
1041         .cra_exit               = ablk_exit,
1042         .cra_u = {
1043                 .ablkcipher = {
1044                         .min_keysize    = AES_MIN_KEY_SIZE,
1045                         .max_keysize    = AES_MAX_KEY_SIZE,
1046                         .ivsize         = AES_BLOCK_SIZE,
1047                         .setkey         = ablk_set_key,
1048                         .encrypt        = ablk_encrypt,
1049                         .decrypt        = ablk_encrypt,
1050                         .geniv          = "chainiv",
1051                 },
1052         },
1053 }, {
1054         .cra_name               = "__gcm-aes-aesni",
1055         .cra_driver_name        = "__driver-gcm-aes-aesni",
1056         .cra_priority           = 0,
1057         .cra_flags              = CRYPTO_ALG_TYPE_AEAD,
1058         .cra_blocksize          = 1,
1059         .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx) +
1060                                   AESNI_ALIGN,
1061         .cra_alignmask          = 0,
1062         .cra_type               = &crypto_aead_type,
1063         .cra_module             = THIS_MODULE,
1064         .cra_u = {
1065                 .aead = {
1066                         .encrypt        = __driver_rfc4106_encrypt,
1067                         .decrypt        = __driver_rfc4106_decrypt,
1068                 },
1069         },
1070 }, {
1071         .cra_name               = "rfc4106(gcm(aes))",
1072         .cra_driver_name        = "rfc4106-gcm-aesni",
1073         .cra_priority           = 400,
1074         .cra_flags              = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1075         .cra_blocksize          = 1,
1076         .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx) +
1077                                   AESNI_ALIGN,
1078         .cra_alignmask          = 0,
1079         .cra_type               = &crypto_nivaead_type,
1080         .cra_module             = THIS_MODULE,
1081         .cra_init               = rfc4106_init,
1082         .cra_exit               = rfc4106_exit,
1083         .cra_u = {
1084                 .aead = {
1085                         .setkey         = rfc4106_set_key,
1086                         .setauthsize    = rfc4106_set_authsize,
1087                         .encrypt        = rfc4106_encrypt,
1088                         .decrypt        = rfc4106_decrypt,
1089                         .geniv          = "seqiv",
1090                         .ivsize         = 8,
1091                         .maxauthsize    = 16,
1092                 },
1093         },
1094 #ifdef HAS_CTR
1095 }, {
1096         .cra_name               = "rfc3686(ctr(aes))",
1097         .cra_driver_name        = "rfc3686-ctr-aes-aesni",
1098         .cra_priority           = 400,
1099         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1100         .cra_blocksize          = 1,
1101         .cra_ctxsize            = sizeof(struct async_aes_ctx),
1102         .cra_alignmask          = 0,
1103         .cra_type               = &crypto_ablkcipher_type,
1104         .cra_module             = THIS_MODULE,
1105         .cra_init               = ablk_rfc3686_ctr_init,
1106         .cra_exit               = ablk_exit,
1107         .cra_u = {
1108                 .ablkcipher = {
1109                         .min_keysize = AES_MIN_KEY_SIZE +
1110                                        CTR_RFC3686_NONCE_SIZE,
1111                         .max_keysize = AES_MAX_KEY_SIZE +
1112                                        CTR_RFC3686_NONCE_SIZE,
1113                         .ivsize      = CTR_RFC3686_IV_SIZE,
1114                         .setkey      = ablk_set_key,
1115                         .encrypt     = ablk_encrypt,
1116                         .decrypt     = ablk_decrypt,
1117                         .geniv       = "seqiv",
1118                 },
1119         },
1120 #endif
1121 #endif
1122 #ifdef HAS_LRW
1123 }, {
1124         .cra_name               = "lrw(aes)",
1125         .cra_driver_name        = "lrw-aes-aesni",
1126         .cra_priority           = 400,
1127         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1128         .cra_blocksize          = AES_BLOCK_SIZE,
1129         .cra_ctxsize            = sizeof(struct async_aes_ctx),
1130         .cra_alignmask          = 0,
1131         .cra_type               = &crypto_ablkcipher_type,
1132         .cra_module             = THIS_MODULE,
1133         .cra_init               = ablk_lrw_init,
1134         .cra_exit               = ablk_exit,
1135         .cra_u = {
1136                 .ablkcipher = {
1137                         .min_keysize    = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
1138                         .max_keysize    = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
1139                         .ivsize         = AES_BLOCK_SIZE,
1140                         .setkey         = ablk_set_key,
1141                         .encrypt        = ablk_encrypt,
1142                         .decrypt        = ablk_decrypt,
1143                 },
1144         },
1145 #endif
1146 #ifdef HAS_PCBC
1147 }, {
1148         .cra_name               = "pcbc(aes)",
1149         .cra_driver_name        = "pcbc-aes-aesni",
1150         .cra_priority           = 400,
1151         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1152         .cra_blocksize          = AES_BLOCK_SIZE,
1153         .cra_ctxsize            = sizeof(struct async_aes_ctx),
1154         .cra_alignmask          = 0,
1155         .cra_type               = &crypto_ablkcipher_type,
1156         .cra_module             = THIS_MODULE,
1157         .cra_init               = ablk_pcbc_init,
1158         .cra_exit               = ablk_exit,
1159         .cra_u = {
1160                 .ablkcipher = {
1161                         .min_keysize    = AES_MIN_KEY_SIZE,
1162                         .max_keysize    = AES_MAX_KEY_SIZE,
1163                         .ivsize         = AES_BLOCK_SIZE,
1164                         .setkey         = ablk_set_key,
1165                         .encrypt        = ablk_encrypt,
1166                         .decrypt        = ablk_decrypt,
1167                 },
1168         },
1169 #endif
1170 #ifdef HAS_XTS
1171 }, {
1172         .cra_name               = "xts(aes)",
1173         .cra_driver_name        = "xts-aes-aesni",
1174         .cra_priority           = 400,
1175         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1176         .cra_blocksize          = AES_BLOCK_SIZE,
1177         .cra_ctxsize            = sizeof(struct async_aes_ctx),
1178         .cra_alignmask          = 0,
1179         .cra_type               = &crypto_ablkcipher_type,
1180         .cra_module             = THIS_MODULE,
1181         .cra_init               = ablk_xts_init,
1182         .cra_exit               = ablk_exit,
1183         .cra_u = {
1184                 .ablkcipher = {
1185                         .min_keysize    = 2 * AES_MIN_KEY_SIZE,
1186                         .max_keysize    = 2 * AES_MAX_KEY_SIZE,
1187                         .ivsize         = AES_BLOCK_SIZE,
1188                         .setkey         = ablk_set_key,
1189                         .encrypt        = ablk_encrypt,
1190                         .decrypt        = ablk_decrypt,
1191                 },
1192         },
1193 #endif
1194 } };
1195
1196
1197 static const struct x86_cpu_id aesni_cpu_id[] = {
1198         X86_FEATURE_MATCH(X86_FEATURE_AES),
1199         {}
1200 };
1201 MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
1202
1203 static int __init aesni_init(void)
1204 {
1205         int err, i;
1206
1207         if (!x86_match_cpu(aesni_cpu_id))
1208                 return -ENODEV;
1209
1210         err = crypto_fpu_init();
1211         if (err)
1212                 return err;
1213
1214         for (i = 0; i < ARRAY_SIZE(aesni_algs); i++)
1215                 INIT_LIST_HEAD(&aesni_algs[i].cra_list);
1216
1217         return crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
1218 }
1219
1220 static void __exit aesni_exit(void)
1221 {
1222         crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
1223
1224         crypto_fpu_exit();
1225 }
1226
1227 module_init(aesni_init);
1228 module_exit(aesni_exit);
1229
1230 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
1231 MODULE_LICENSE("GPL");
1232 MODULE_ALIAS("aes");