Commit | Line | Data |
---|---|---|
54b6a1bd HY |
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 | * | |
0bd82f5f TS |
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 | * | |
54b6a1bd HY |
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> | |
7c52d551 | 25 | #include <linux/module.h> |
54b6a1bd HY |
26 | #include <linux/err.h> |
27 | #include <crypto/algapi.h> | |
28 | #include <crypto/aes.h> | |
29 | #include <crypto/cryptd.h> | |
12387a46 | 30 | #include <crypto/ctr.h> |
023af608 JK |
31 | #include <crypto/b128ops.h> |
32 | #include <crypto/lrw.h> | |
33 | #include <crypto/xts.h> | |
3bd391f0 | 34 | #include <asm/cpu_device_id.h> |
54b6a1bd | 35 | #include <asm/i387.h> |
70ef2601 | 36 | #include <asm/crypto/aes.h> |
a9629d71 | 37 | #include <asm/crypto/ablk_helper.h> |
0bd82f5f TS |
38 | #include <crypto/scatterwalk.h> |
39 | #include <crypto/internal/aead.h> | |
40 | #include <linux/workqueue.h> | |
41 | #include <linux/spinlock.h> | |
54b6a1bd | 42 | |
2cf4ac8b HY |
43 | #if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE) |
44 | #define HAS_CTR | |
45 | #endif | |
46 | ||
2cf4ac8b HY |
47 | #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE) |
48 | #define HAS_PCBC | |
49 | #endif | |
50 | ||
0bd82f5f TS |
51 | /* This data is stored at the end of the crypto_tfm struct. |
52 | * It's a type of per "session" data storage location. | |
53 | * This needs to be 16 byte aligned. | |
54 | */ | |
55 | struct aesni_rfc4106_gcm_ctx { | |
56 | u8 hash_subkey[16]; | |
57 | struct crypto_aes_ctx aes_key_expanded; | |
58 | u8 nonce[4]; | |
59 | struct cryptd_aead *cryptd_tfm; | |
60 | }; | |
61 | ||
62 | struct aesni_gcm_set_hash_subkey_result { | |
63 | int err; | |
64 | struct completion completion; | |
65 | }; | |
66 | ||
67 | struct aesni_hash_subkey_req_data { | |
68 | u8 iv[16]; | |
69 | struct aesni_gcm_set_hash_subkey_result result; | |
70 | struct scatterlist sg; | |
71 | }; | |
72 | ||
73 | #define AESNI_ALIGN (16) | |
54b6a1bd | 74 | #define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1)) |
0bd82f5f | 75 | #define RFC4106_HASH_SUBKEY_SIZE 16 |
54b6a1bd | 76 | |
023af608 JK |
77 | struct aesni_lrw_ctx { |
78 | struct lrw_table_ctx lrw_table; | |
79 | u8 raw_aes_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; | |
80 | }; | |
81 | ||
82 | struct aesni_xts_ctx { | |
83 | u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; | |
84 | u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; | |
85 | }; | |
86 | ||
54b6a1bd HY |
87 | asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, |
88 | unsigned int key_len); | |
89 | asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
90 | const u8 *in); | |
91 | asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
92 | const u8 *in); | |
93 | asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
94 | const u8 *in, unsigned int len); | |
95 | asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
96 | const u8 *in, unsigned int len); | |
97 | asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
98 | const u8 *in, unsigned int len, u8 *iv); | |
99 | asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
100 | const u8 *in, unsigned int len, u8 *iv); | |
9bed4aca RD |
101 | |
102 | int crypto_fpu_init(void); | |
103 | void crypto_fpu_exit(void); | |
104 | ||
0d258efb | 105 | #ifdef CONFIG_X86_64 |
12387a46 HY |
106 | asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out, |
107 | const u8 *in, unsigned int len, u8 *iv); | |
54b6a1bd | 108 | |
0bd82f5f TS |
109 | /* asmlinkage void aesni_gcm_enc() |
110 | * void *ctx, AES Key schedule. Starts on a 16 byte boundary. | |
111 | * u8 *out, Ciphertext output. Encrypt in-place is allowed. | |
112 | * const u8 *in, Plaintext input | |
113 | * unsigned long plaintext_len, Length of data in bytes for encryption. | |
114 | * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association) | |
115 | * concatenated with 8 byte Initialisation Vector (from IPSec ESP | |
116 | * Payload) concatenated with 0x00000001. 16-byte aligned pointer. | |
117 | * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. | |
118 | * const u8 *aad, Additional Authentication Data (AAD) | |
119 | * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this | |
120 | * is going to be 8 or 12 bytes | |
121 | * u8 *auth_tag, Authenticated Tag output. | |
122 | * unsigned long auth_tag_len), Authenticated Tag Length in bytes. | |
123 | * Valid values are 16 (most likely), 12 or 8. | |
124 | */ | |
125 | asmlinkage void aesni_gcm_enc(void *ctx, u8 *out, | |
126 | const u8 *in, unsigned long plaintext_len, u8 *iv, | |
127 | u8 *hash_subkey, const u8 *aad, unsigned long aad_len, | |
128 | u8 *auth_tag, unsigned long auth_tag_len); | |
129 | ||
130 | /* asmlinkage void aesni_gcm_dec() | |
131 | * void *ctx, AES Key schedule. Starts on a 16 byte boundary. | |
132 | * u8 *out, Plaintext output. Decrypt in-place is allowed. | |
133 | * const u8 *in, Ciphertext input | |
134 | * unsigned long ciphertext_len, Length of data in bytes for decryption. | |
135 | * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association) | |
136 | * concatenated with 8 byte Initialisation Vector (from IPSec ESP | |
137 | * Payload) concatenated with 0x00000001. 16-byte aligned pointer. | |
138 | * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. | |
139 | * const u8 *aad, Additional Authentication Data (AAD) | |
140 | * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going | |
141 | * to be 8 or 12 bytes | |
142 | * u8 *auth_tag, Authenticated Tag output. | |
143 | * unsigned long auth_tag_len) Authenticated Tag Length in bytes. | |
144 | * Valid values are 16 (most likely), 12 or 8. | |
145 | */ | |
146 | asmlinkage void aesni_gcm_dec(void *ctx, u8 *out, | |
147 | const u8 *in, unsigned long ciphertext_len, u8 *iv, | |
148 | u8 *hash_subkey, const u8 *aad, unsigned long aad_len, | |
149 | u8 *auth_tag, unsigned long auth_tag_len); | |
150 | ||
151 | static inline struct | |
152 | aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm) | |
153 | { | |
154 | return | |
155 | (struct aesni_rfc4106_gcm_ctx *) | |
156 | PTR_ALIGN((u8 *) | |
157 | crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_ALIGN); | |
158 | } | |
559ad0ff | 159 | #endif |
0bd82f5f | 160 | |
54b6a1bd HY |
161 | static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx) |
162 | { | |
163 | unsigned long addr = (unsigned long)raw_ctx; | |
164 | unsigned long align = AESNI_ALIGN; | |
165 | ||
166 | if (align <= crypto_tfm_ctx_alignment()) | |
167 | align = 1; | |
168 | return (struct crypto_aes_ctx *)ALIGN(addr, align); | |
169 | } | |
170 | ||
171 | static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx, | |
172 | const u8 *in_key, unsigned int key_len) | |
173 | { | |
174 | struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx); | |
175 | u32 *flags = &tfm->crt_flags; | |
176 | int err; | |
177 | ||
178 | if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 && | |
179 | key_len != AES_KEYSIZE_256) { | |
180 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
181 | return -EINVAL; | |
182 | } | |
183 | ||
13b79b97 | 184 | if (!irq_fpu_usable()) |
54b6a1bd HY |
185 | err = crypto_aes_expand_key(ctx, in_key, key_len); |
186 | else { | |
187 | kernel_fpu_begin(); | |
188 | err = aesni_set_key(ctx, in_key, key_len); | |
189 | kernel_fpu_end(); | |
190 | } | |
191 | ||
192 | return err; | |
193 | } | |
194 | ||
195 | static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, | |
196 | unsigned int key_len) | |
197 | { | |
198 | return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len); | |
199 | } | |
200 | ||
201 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
202 | { | |
203 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
204 | ||
13b79b97 | 205 | if (!irq_fpu_usable()) |
54b6a1bd HY |
206 | crypto_aes_encrypt_x86(ctx, dst, src); |
207 | else { | |
208 | kernel_fpu_begin(); | |
209 | aesni_enc(ctx, dst, src); | |
210 | kernel_fpu_end(); | |
211 | } | |
212 | } | |
213 | ||
214 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
215 | { | |
216 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
217 | ||
13b79b97 | 218 | if (!irq_fpu_usable()) |
54b6a1bd HY |
219 | crypto_aes_decrypt_x86(ctx, dst, src); |
220 | else { | |
221 | kernel_fpu_begin(); | |
222 | aesni_dec(ctx, dst, src); | |
223 | kernel_fpu_end(); | |
224 | } | |
225 | } | |
226 | ||
2cf4ac8b HY |
227 | static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
228 | { | |
229 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
230 | ||
231 | aesni_enc(ctx, dst, src); | |
232 | } | |
233 | ||
234 | static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
235 | { | |
236 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
237 | ||
238 | aesni_dec(ctx, dst, src); | |
239 | } | |
240 | ||
54b6a1bd HY |
241 | static int ecb_encrypt(struct blkcipher_desc *desc, |
242 | struct scatterlist *dst, struct scatterlist *src, | |
243 | unsigned int nbytes) | |
244 | { | |
245 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
246 | struct blkcipher_walk walk; | |
247 | int err; | |
248 | ||
249 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
250 | err = blkcipher_walk_virt(desc, &walk); | |
9251b64f | 251 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
54b6a1bd HY |
252 | |
253 | kernel_fpu_begin(); | |
254 | while ((nbytes = walk.nbytes)) { | |
255 | aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
256 | nbytes & AES_BLOCK_MASK); | |
257 | nbytes &= AES_BLOCK_SIZE - 1; | |
258 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
259 | } | |
260 | kernel_fpu_end(); | |
261 | ||
262 | return err; | |
263 | } | |
264 | ||
265 | static int ecb_decrypt(struct blkcipher_desc *desc, | |
266 | struct scatterlist *dst, struct scatterlist *src, | |
267 | unsigned int nbytes) | |
268 | { | |
269 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
270 | struct blkcipher_walk walk; | |
271 | int err; | |
272 | ||
273 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
274 | err = blkcipher_walk_virt(desc, &walk); | |
9251b64f | 275 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
54b6a1bd HY |
276 | |
277 | kernel_fpu_begin(); | |
278 | while ((nbytes = walk.nbytes)) { | |
279 | aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
280 | nbytes & AES_BLOCK_MASK); | |
281 | nbytes &= AES_BLOCK_SIZE - 1; | |
282 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
283 | } | |
284 | kernel_fpu_end(); | |
285 | ||
286 | return err; | |
287 | } | |
288 | ||
54b6a1bd HY |
289 | static int cbc_encrypt(struct blkcipher_desc *desc, |
290 | struct scatterlist *dst, struct scatterlist *src, | |
291 | unsigned int nbytes) | |
292 | { | |
293 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
294 | struct blkcipher_walk walk; | |
295 | int err; | |
296 | ||
297 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
298 | err = blkcipher_walk_virt(desc, &walk); | |
9251b64f | 299 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
54b6a1bd HY |
300 | |
301 | kernel_fpu_begin(); | |
302 | while ((nbytes = walk.nbytes)) { | |
303 | aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
304 | nbytes & AES_BLOCK_MASK, walk.iv); | |
305 | nbytes &= AES_BLOCK_SIZE - 1; | |
306 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
307 | } | |
308 | kernel_fpu_end(); | |
309 | ||
310 | return err; | |
311 | } | |
312 | ||
313 | static int cbc_decrypt(struct blkcipher_desc *desc, | |
314 | struct scatterlist *dst, struct scatterlist *src, | |
315 | unsigned int nbytes) | |
316 | { | |
317 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
318 | struct blkcipher_walk walk; | |
319 | int err; | |
320 | ||
321 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
322 | err = blkcipher_walk_virt(desc, &walk); | |
9251b64f | 323 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
54b6a1bd HY |
324 | |
325 | kernel_fpu_begin(); | |
326 | while ((nbytes = walk.nbytes)) { | |
327 | aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
328 | nbytes & AES_BLOCK_MASK, walk.iv); | |
329 | nbytes &= AES_BLOCK_SIZE - 1; | |
330 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
331 | } | |
332 | kernel_fpu_end(); | |
333 | ||
334 | return err; | |
335 | } | |
336 | ||
0d258efb | 337 | #ifdef CONFIG_X86_64 |
12387a46 HY |
338 | static void ctr_crypt_final(struct crypto_aes_ctx *ctx, |
339 | struct blkcipher_walk *walk) | |
340 | { | |
341 | u8 *ctrblk = walk->iv; | |
342 | u8 keystream[AES_BLOCK_SIZE]; | |
343 | u8 *src = walk->src.virt.addr; | |
344 | u8 *dst = walk->dst.virt.addr; | |
345 | unsigned int nbytes = walk->nbytes; | |
346 | ||
347 | aesni_enc(ctx, keystream, ctrblk); | |
348 | crypto_xor(keystream, src, nbytes); | |
349 | memcpy(dst, keystream, nbytes); | |
350 | crypto_inc(ctrblk, AES_BLOCK_SIZE); | |
351 | } | |
352 | ||
353 | static int ctr_crypt(struct blkcipher_desc *desc, | |
354 | struct scatterlist *dst, struct scatterlist *src, | |
355 | unsigned int nbytes) | |
356 | { | |
357 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
358 | struct blkcipher_walk walk; | |
359 | int err; | |
360 | ||
361 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
362 | err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); | |
363 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
364 | ||
365 | kernel_fpu_begin(); | |
366 | while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { | |
367 | aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
368 | nbytes & AES_BLOCK_MASK, walk.iv); | |
369 | nbytes &= AES_BLOCK_SIZE - 1; | |
370 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
371 | } | |
372 | if (walk.nbytes) { | |
373 | ctr_crypt_final(ctx, &walk); | |
374 | err = blkcipher_walk_done(desc, &walk, 0); | |
375 | } | |
376 | kernel_fpu_end(); | |
377 | ||
378 | return err; | |
379 | } | |
0d258efb | 380 | #endif |
12387a46 | 381 | |
54b6a1bd HY |
382 | static int ablk_ecb_init(struct crypto_tfm *tfm) |
383 | { | |
ef45b834 | 384 | return ablk_init_common(tfm, "__driver-ecb-aes-aesni"); |
54b6a1bd HY |
385 | } |
386 | ||
54b6a1bd HY |
387 | static int ablk_cbc_init(struct crypto_tfm *tfm) |
388 | { | |
ef45b834 | 389 | return ablk_init_common(tfm, "__driver-cbc-aes-aesni"); |
54b6a1bd HY |
390 | } |
391 | ||
0d258efb | 392 | #ifdef CONFIG_X86_64 |
2cf4ac8b HY |
393 | static int ablk_ctr_init(struct crypto_tfm *tfm) |
394 | { | |
ef45b834 | 395 | return ablk_init_common(tfm, "__driver-ctr-aes-aesni"); |
2cf4ac8b HY |
396 | } |
397 | ||
12387a46 HY |
398 | #ifdef HAS_CTR |
399 | static int ablk_rfc3686_ctr_init(struct crypto_tfm *tfm) | |
400 | { | |
ef45b834 | 401 | return ablk_init_common(tfm, "rfc3686(__driver-ctr-aes-aesni)"); |
12387a46 | 402 | } |
2cf4ac8b | 403 | #endif |
0d258efb | 404 | #endif |
2cf4ac8b | 405 | |
2cf4ac8b HY |
406 | #ifdef HAS_PCBC |
407 | static int ablk_pcbc_init(struct crypto_tfm *tfm) | |
408 | { | |
ef45b834 | 409 | return ablk_init_common(tfm, "fpu(pcbc(__driver-aes-aesni))"); |
2cf4ac8b | 410 | } |
2cf4ac8b HY |
411 | #endif |
412 | ||
023af608 | 413 | static void lrw_xts_encrypt_callback(void *ctx, u8 *blks, unsigned int nbytes) |
2cf4ac8b | 414 | { |
023af608 JK |
415 | aesni_ecb_enc(ctx, blks, blks, nbytes); |
416 | } | |
417 | ||
418 | static void lrw_xts_decrypt_callback(void *ctx, u8 *blks, unsigned int nbytes) | |
419 | { | |
420 | aesni_ecb_dec(ctx, blks, blks, nbytes); | |
421 | } | |
422 | ||
423 | static int lrw_aesni_setkey(struct crypto_tfm *tfm, const u8 *key, | |
424 | unsigned int keylen) | |
425 | { | |
426 | struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm); | |
427 | int err; | |
428 | ||
429 | err = aes_set_key_common(tfm, ctx->raw_aes_ctx, key, | |
430 | keylen - AES_BLOCK_SIZE); | |
431 | if (err) | |
432 | return err; | |
433 | ||
434 | return lrw_init_table(&ctx->lrw_table, key + keylen - AES_BLOCK_SIZE); | |
435 | } | |
436 | ||
437 | static void lrw_aesni_exit_tfm(struct crypto_tfm *tfm) | |
438 | { | |
439 | struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm); | |
440 | ||
441 | lrw_free_table(&ctx->lrw_table); | |
442 | } | |
443 | ||
444 | static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
445 | struct scatterlist *src, unsigned int nbytes) | |
446 | { | |
447 | struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
448 | be128 buf[8]; | |
449 | struct lrw_crypt_req req = { | |
450 | .tbuf = buf, | |
451 | .tbuflen = sizeof(buf), | |
452 | ||
453 | .table_ctx = &ctx->lrw_table, | |
454 | .crypt_ctx = aes_ctx(ctx->raw_aes_ctx), | |
455 | .crypt_fn = lrw_xts_encrypt_callback, | |
456 | }; | |
457 | int ret; | |
458 | ||
459 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
460 | ||
461 | kernel_fpu_begin(); | |
462 | ret = lrw_crypt(desc, dst, src, nbytes, &req); | |
463 | kernel_fpu_end(); | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
469 | struct scatterlist *src, unsigned int nbytes) | |
470 | { | |
471 | struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
472 | be128 buf[8]; | |
473 | struct lrw_crypt_req req = { | |
474 | .tbuf = buf, | |
475 | .tbuflen = sizeof(buf), | |
476 | ||
477 | .table_ctx = &ctx->lrw_table, | |
478 | .crypt_ctx = aes_ctx(ctx->raw_aes_ctx), | |
479 | .crypt_fn = lrw_xts_decrypt_callback, | |
480 | }; | |
481 | int ret; | |
482 | ||
483 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
484 | ||
485 | kernel_fpu_begin(); | |
486 | ret = lrw_crypt(desc, dst, src, nbytes, &req); | |
487 | kernel_fpu_end(); | |
488 | ||
489 | return ret; | |
490 | } | |
491 | ||
492 | static int xts_aesni_setkey(struct crypto_tfm *tfm, const u8 *key, | |
493 | unsigned int keylen) | |
494 | { | |
495 | struct aesni_xts_ctx *ctx = crypto_tfm_ctx(tfm); | |
496 | u32 *flags = &tfm->crt_flags; | |
497 | int err; | |
498 | ||
499 | /* key consists of keys of equal size concatenated, therefore | |
500 | * the length must be even | |
501 | */ | |
502 | if (keylen % 2) { | |
503 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
504 | return -EINVAL; | |
505 | } | |
506 | ||
507 | /* first half of xts-key is for crypt */ | |
508 | err = aes_set_key_common(tfm, ctx->raw_crypt_ctx, key, keylen / 2); | |
509 | if (err) | |
510 | return err; | |
511 | ||
512 | /* second half of xts-key is for tweak */ | |
513 | return aes_set_key_common(tfm, ctx->raw_tweak_ctx, key + keylen / 2, | |
514 | keylen / 2); | |
515 | } | |
516 | ||
517 | ||
32bec973 JK |
518 | static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in) |
519 | { | |
520 | aesni_enc(ctx, out, in); | |
521 | } | |
522 | ||
023af608 JK |
523 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
524 | struct scatterlist *src, unsigned int nbytes) | |
525 | { | |
526 | struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
527 | be128 buf[8]; | |
528 | struct xts_crypt_req req = { | |
529 | .tbuf = buf, | |
530 | .tbuflen = sizeof(buf), | |
531 | ||
532 | .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), | |
32bec973 | 533 | .tweak_fn = aesni_xts_tweak, |
023af608 JK |
534 | .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), |
535 | .crypt_fn = lrw_xts_encrypt_callback, | |
536 | }; | |
537 | int ret; | |
538 | ||
539 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
540 | ||
541 | kernel_fpu_begin(); | |
542 | ret = xts_crypt(desc, dst, src, nbytes, &req); | |
543 | kernel_fpu_end(); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
548 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
549 | struct scatterlist *src, unsigned int nbytes) | |
550 | { | |
551 | struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
552 | be128 buf[8]; | |
553 | struct xts_crypt_req req = { | |
554 | .tbuf = buf, | |
555 | .tbuflen = sizeof(buf), | |
556 | ||
557 | .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), | |
32bec973 | 558 | .tweak_fn = aesni_xts_tweak, |
023af608 JK |
559 | .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), |
560 | .crypt_fn = lrw_xts_decrypt_callback, | |
561 | }; | |
562 | int ret; | |
563 | ||
564 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
565 | ||
566 | kernel_fpu_begin(); | |
567 | ret = xts_crypt(desc, dst, src, nbytes, &req); | |
568 | kernel_fpu_end(); | |
569 | ||
570 | return ret; | |
2cf4ac8b | 571 | } |
2cf4ac8b | 572 | |
559ad0ff | 573 | #ifdef CONFIG_X86_64 |
0bd82f5f TS |
574 | static int rfc4106_init(struct crypto_tfm *tfm) |
575 | { | |
576 | struct cryptd_aead *cryptd_tfm; | |
577 | struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *) | |
578 | PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN); | |
60af520c TS |
579 | struct crypto_aead *cryptd_child; |
580 | struct aesni_rfc4106_gcm_ctx *child_ctx; | |
0bd82f5f TS |
581 | cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0); |
582 | if (IS_ERR(cryptd_tfm)) | |
583 | return PTR_ERR(cryptd_tfm); | |
60af520c TS |
584 | |
585 | cryptd_child = cryptd_aead_child(cryptd_tfm); | |
586 | child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child); | |
587 | memcpy(child_ctx, ctx, sizeof(*ctx)); | |
0bd82f5f TS |
588 | ctx->cryptd_tfm = cryptd_tfm; |
589 | tfm->crt_aead.reqsize = sizeof(struct aead_request) | |
590 | + crypto_aead_reqsize(&cryptd_tfm->base); | |
591 | return 0; | |
592 | } | |
593 | ||
594 | static void rfc4106_exit(struct crypto_tfm *tfm) | |
595 | { | |
596 | struct aesni_rfc4106_gcm_ctx *ctx = | |
597 | (struct aesni_rfc4106_gcm_ctx *) | |
598 | PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN); | |
599 | if (!IS_ERR(ctx->cryptd_tfm)) | |
600 | cryptd_free_aead(ctx->cryptd_tfm); | |
601 | return; | |
602 | } | |
603 | ||
604 | static void | |
605 | rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err) | |
606 | { | |
607 | struct aesni_gcm_set_hash_subkey_result *result = req->data; | |
608 | ||
609 | if (err == -EINPROGRESS) | |
610 | return; | |
611 | result->err = err; | |
612 | complete(&result->completion); | |
613 | } | |
614 | ||
615 | static int | |
616 | rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len) | |
617 | { | |
618 | struct crypto_ablkcipher *ctr_tfm; | |
619 | struct ablkcipher_request *req; | |
620 | int ret = -EINVAL; | |
621 | struct aesni_hash_subkey_req_data *req_data; | |
622 | ||
623 | ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0); | |
624 | if (IS_ERR(ctr_tfm)) | |
625 | return PTR_ERR(ctr_tfm); | |
626 | ||
627 | crypto_ablkcipher_clear_flags(ctr_tfm, ~0); | |
628 | ||
629 | ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len); | |
7efd95f6 | 630 | if (ret) |
fc9044e2 | 631 | goto out_free_ablkcipher; |
0bd82f5f | 632 | |
fc9044e2 | 633 | ret = -ENOMEM; |
0bd82f5f | 634 | req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL); |
fc9044e2 | 635 | if (!req) |
7efd95f6 | 636 | goto out_free_ablkcipher; |
0bd82f5f TS |
637 | |
638 | req_data = kmalloc(sizeof(*req_data), GFP_KERNEL); | |
fc9044e2 | 639 | if (!req_data) |
7efd95f6 | 640 | goto out_free_request; |
fc9044e2 | 641 | |
0bd82f5f TS |
642 | memset(req_data->iv, 0, sizeof(req_data->iv)); |
643 | ||
644 | /* Clear the data in the hash sub key container to zero.*/ | |
645 | /* We want to cipher all zeros to create the hash sub key. */ | |
646 | memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE); | |
647 | ||
648 | init_completion(&req_data->result.completion); | |
649 | sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE); | |
650 | ablkcipher_request_set_tfm(req, ctr_tfm); | |
651 | ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP | | |
652 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
653 | rfc4106_set_hash_subkey_done, | |
654 | &req_data->result); | |
655 | ||
656 | ablkcipher_request_set_crypt(req, &req_data->sg, | |
657 | &req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv); | |
658 | ||
659 | ret = crypto_ablkcipher_encrypt(req); | |
660 | if (ret == -EINPROGRESS || ret == -EBUSY) { | |
661 | ret = wait_for_completion_interruptible | |
662 | (&req_data->result.completion); | |
663 | if (!ret) | |
664 | ret = req_data->result.err; | |
665 | } | |
fc9044e2 | 666 | kfree(req_data); |
7efd95f6 | 667 | out_free_request: |
0bd82f5f | 668 | ablkcipher_request_free(req); |
7efd95f6 | 669 | out_free_ablkcipher: |
0bd82f5f TS |
670 | crypto_free_ablkcipher(ctr_tfm); |
671 | return ret; | |
672 | } | |
673 | ||
674 | static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key, | |
675 | unsigned int key_len) | |
676 | { | |
677 | int ret = 0; | |
678 | struct crypto_tfm *tfm = crypto_aead_tfm(parent); | |
679 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent); | |
60af520c TS |
680 | struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
681 | struct aesni_rfc4106_gcm_ctx *child_ctx = | |
682 | aesni_rfc4106_gcm_ctx_get(cryptd_child); | |
bf084d8f | 683 | u8 *new_key_align, *new_key_mem = NULL; |
0bd82f5f TS |
684 | |
685 | if (key_len < 4) { | |
686 | crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
687 | return -EINVAL; | |
688 | } | |
689 | /*Account for 4 byte nonce at the end.*/ | |
690 | key_len -= 4; | |
691 | if (key_len != AES_KEYSIZE_128) { | |
692 | crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
693 | return -EINVAL; | |
694 | } | |
695 | ||
696 | memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce)); | |
697 | /*This must be on a 16 byte boundary!*/ | |
698 | if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN) | |
699 | return -EINVAL; | |
700 | ||
701 | if ((unsigned long)key % AESNI_ALIGN) { | |
702 | /*key is not aligned: use an auxuliar aligned pointer*/ | |
703 | new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL); | |
704 | if (!new_key_mem) | |
705 | return -ENOMEM; | |
706 | ||
bf084d8f MB |
707 | new_key_align = PTR_ALIGN(new_key_mem, AESNI_ALIGN); |
708 | memcpy(new_key_align, key, key_len); | |
709 | key = new_key_align; | |
0bd82f5f TS |
710 | } |
711 | ||
712 | if (!irq_fpu_usable()) | |
713 | ret = crypto_aes_expand_key(&(ctx->aes_key_expanded), | |
714 | key, key_len); | |
715 | else { | |
716 | kernel_fpu_begin(); | |
717 | ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len); | |
718 | kernel_fpu_end(); | |
719 | } | |
720 | /*This must be on a 16 byte boundary!*/ | |
721 | if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) { | |
722 | ret = -EINVAL; | |
723 | goto exit; | |
724 | } | |
725 | ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len); | |
60af520c | 726 | memcpy(child_ctx, ctx, sizeof(*ctx)); |
0bd82f5f TS |
727 | exit: |
728 | kfree(new_key_mem); | |
729 | return ret; | |
730 | } | |
731 | ||
732 | /* This is the Integrity Check Value (aka the authentication tag length and can | |
733 | * be 8, 12 or 16 bytes long. */ | |
734 | static int rfc4106_set_authsize(struct crypto_aead *parent, | |
735 | unsigned int authsize) | |
736 | { | |
737 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent); | |
738 | struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); | |
739 | ||
740 | switch (authsize) { | |
741 | case 8: | |
742 | case 12: | |
743 | case 16: | |
744 | break; | |
745 | default: | |
746 | return -EINVAL; | |
747 | } | |
748 | crypto_aead_crt(parent)->authsize = authsize; | |
749 | crypto_aead_crt(cryptd_child)->authsize = authsize; | |
750 | return 0; | |
751 | } | |
752 | ||
753 | static int rfc4106_encrypt(struct aead_request *req) | |
754 | { | |
755 | int ret; | |
756 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
757 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); | |
0bd82f5f TS |
758 | |
759 | if (!irq_fpu_usable()) { | |
760 | struct aead_request *cryptd_req = | |
761 | (struct aead_request *) aead_request_ctx(req); | |
762 | memcpy(cryptd_req, req, sizeof(*req)); | |
763 | aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); | |
764 | return crypto_aead_encrypt(cryptd_req); | |
765 | } else { | |
60af520c | 766 | struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
0bd82f5f TS |
767 | kernel_fpu_begin(); |
768 | ret = cryptd_child->base.crt_aead.encrypt(req); | |
769 | kernel_fpu_end(); | |
770 | return ret; | |
771 | } | |
772 | } | |
773 | ||
774 | static int rfc4106_decrypt(struct aead_request *req) | |
775 | { | |
776 | int ret; | |
777 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
778 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); | |
0bd82f5f TS |
779 | |
780 | if (!irq_fpu_usable()) { | |
781 | struct aead_request *cryptd_req = | |
782 | (struct aead_request *) aead_request_ctx(req); | |
783 | memcpy(cryptd_req, req, sizeof(*req)); | |
784 | aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); | |
785 | return crypto_aead_decrypt(cryptd_req); | |
786 | } else { | |
60af520c | 787 | struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
0bd82f5f TS |
788 | kernel_fpu_begin(); |
789 | ret = cryptd_child->base.crt_aead.decrypt(req); | |
790 | kernel_fpu_end(); | |
791 | return ret; | |
792 | } | |
793 | } | |
794 | ||
0bd82f5f TS |
795 | static int __driver_rfc4106_encrypt(struct aead_request *req) |
796 | { | |
797 | u8 one_entry_in_sg = 0; | |
798 | u8 *src, *dst, *assoc; | |
799 | __be32 counter = cpu_to_be32(1); | |
800 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
801 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); | |
802 | void *aes_ctx = &(ctx->aes_key_expanded); | |
803 | unsigned long auth_tag_len = crypto_aead_authsize(tfm); | |
804 | u8 iv_tab[16+AESNI_ALIGN]; | |
805 | u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN); | |
806 | struct scatter_walk src_sg_walk; | |
807 | struct scatter_walk assoc_sg_walk; | |
808 | struct scatter_walk dst_sg_walk; | |
809 | unsigned int i; | |
810 | ||
811 | /* Assuming we are supporting rfc4106 64-bit extended */ | |
812 | /* sequence numbers We need to have the AAD length equal */ | |
813 | /* to 8 or 12 bytes */ | |
814 | if (unlikely(req->assoclen != 8 && req->assoclen != 12)) | |
815 | return -EINVAL; | |
816 | /* IV below built */ | |
817 | for (i = 0; i < 4; i++) | |
818 | *(iv+i) = ctx->nonce[i]; | |
819 | for (i = 0; i < 8; i++) | |
820 | *(iv+4+i) = req->iv[i]; | |
821 | *((__be32 *)(iv+12)) = counter; | |
822 | ||
823 | if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) { | |
824 | one_entry_in_sg = 1; | |
825 | scatterwalk_start(&src_sg_walk, req->src); | |
826 | scatterwalk_start(&assoc_sg_walk, req->assoc); | |
8fd75e12 CW |
827 | src = scatterwalk_map(&src_sg_walk); |
828 | assoc = scatterwalk_map(&assoc_sg_walk); | |
0bd82f5f TS |
829 | dst = src; |
830 | if (unlikely(req->src != req->dst)) { | |
831 | scatterwalk_start(&dst_sg_walk, req->dst); | |
8fd75e12 | 832 | dst = scatterwalk_map(&dst_sg_walk); |
0bd82f5f TS |
833 | } |
834 | ||
835 | } else { | |
836 | /* Allocate memory for src, dst, assoc */ | |
837 | src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen, | |
838 | GFP_ATOMIC); | |
839 | if (unlikely(!src)) | |
840 | return -ENOMEM; | |
841 | assoc = (src + req->cryptlen + auth_tag_len); | |
842 | scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0); | |
843 | scatterwalk_map_and_copy(assoc, req->assoc, 0, | |
844 | req->assoclen, 0); | |
845 | dst = src; | |
846 | } | |
847 | ||
848 | aesni_gcm_enc(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv, | |
849 | ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst | |
850 | + ((unsigned long)req->cryptlen), auth_tag_len); | |
851 | ||
852 | /* The authTag (aka the Integrity Check Value) needs to be written | |
853 | * back to the packet. */ | |
854 | if (one_entry_in_sg) { | |
855 | if (unlikely(req->src != req->dst)) { | |
8fd75e12 | 856 | scatterwalk_unmap(dst); |
0bd82f5f TS |
857 | scatterwalk_done(&dst_sg_walk, 0, 0); |
858 | } | |
8fd75e12 CW |
859 | scatterwalk_unmap(src); |
860 | scatterwalk_unmap(assoc); | |
0bd82f5f TS |
861 | scatterwalk_done(&src_sg_walk, 0, 0); |
862 | scatterwalk_done(&assoc_sg_walk, 0, 0); | |
863 | } else { | |
864 | scatterwalk_map_and_copy(dst, req->dst, 0, | |
865 | req->cryptlen + auth_tag_len, 1); | |
866 | kfree(src); | |
867 | } | |
868 | return 0; | |
869 | } | |
870 | ||
871 | static int __driver_rfc4106_decrypt(struct aead_request *req) | |
872 | { | |
873 | u8 one_entry_in_sg = 0; | |
874 | u8 *src, *dst, *assoc; | |
875 | unsigned long tempCipherLen = 0; | |
876 | __be32 counter = cpu_to_be32(1); | |
877 | int retval = 0; | |
878 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
879 | struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); | |
880 | void *aes_ctx = &(ctx->aes_key_expanded); | |
881 | unsigned long auth_tag_len = crypto_aead_authsize(tfm); | |
882 | u8 iv_and_authTag[32+AESNI_ALIGN]; | |
883 | u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN); | |
884 | u8 *authTag = iv + 16; | |
885 | struct scatter_walk src_sg_walk; | |
886 | struct scatter_walk assoc_sg_walk; | |
887 | struct scatter_walk dst_sg_walk; | |
888 | unsigned int i; | |
889 | ||
890 | if (unlikely((req->cryptlen < auth_tag_len) || | |
891 | (req->assoclen != 8 && req->assoclen != 12))) | |
892 | return -EINVAL; | |
893 | /* Assuming we are supporting rfc4106 64-bit extended */ | |
894 | /* sequence numbers We need to have the AAD length */ | |
895 | /* equal to 8 or 12 bytes */ | |
896 | ||
897 | tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len); | |
898 | /* IV below built */ | |
899 | for (i = 0; i < 4; i++) | |
900 | *(iv+i) = ctx->nonce[i]; | |
901 | for (i = 0; i < 8; i++) | |
902 | *(iv+4+i) = req->iv[i]; | |
903 | *((__be32 *)(iv+12)) = counter; | |
904 | ||
905 | if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) { | |
906 | one_entry_in_sg = 1; | |
907 | scatterwalk_start(&src_sg_walk, req->src); | |
908 | scatterwalk_start(&assoc_sg_walk, req->assoc); | |
8fd75e12 CW |
909 | src = scatterwalk_map(&src_sg_walk); |
910 | assoc = scatterwalk_map(&assoc_sg_walk); | |
0bd82f5f TS |
911 | dst = src; |
912 | if (unlikely(req->src != req->dst)) { | |
913 | scatterwalk_start(&dst_sg_walk, req->dst); | |
8fd75e12 | 914 | dst = scatterwalk_map(&dst_sg_walk); |
0bd82f5f TS |
915 | } |
916 | ||
917 | } else { | |
918 | /* Allocate memory for src, dst, assoc */ | |
919 | src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC); | |
920 | if (!src) | |
921 | return -ENOMEM; | |
922 | assoc = (src + req->cryptlen + auth_tag_len); | |
923 | scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0); | |
924 | scatterwalk_map_and_copy(assoc, req->assoc, 0, | |
925 | req->assoclen, 0); | |
926 | dst = src; | |
927 | } | |
928 | ||
929 | aesni_gcm_dec(aes_ctx, dst, src, tempCipherLen, iv, | |
930 | ctx->hash_subkey, assoc, (unsigned long)req->assoclen, | |
931 | authTag, auth_tag_len); | |
932 | ||
933 | /* Compare generated tag with passed in tag. */ | |
934 | retval = memcmp(src + tempCipherLen, authTag, auth_tag_len) ? | |
935 | -EBADMSG : 0; | |
936 | ||
937 | if (one_entry_in_sg) { | |
938 | if (unlikely(req->src != req->dst)) { | |
8fd75e12 | 939 | scatterwalk_unmap(dst); |
0bd82f5f TS |
940 | scatterwalk_done(&dst_sg_walk, 0, 0); |
941 | } | |
8fd75e12 CW |
942 | scatterwalk_unmap(src); |
943 | scatterwalk_unmap(assoc); | |
0bd82f5f TS |
944 | scatterwalk_done(&src_sg_walk, 0, 0); |
945 | scatterwalk_done(&assoc_sg_walk, 0, 0); | |
946 | } else { | |
947 | scatterwalk_map_and_copy(dst, req->dst, 0, req->cryptlen, 1); | |
948 | kfree(src); | |
949 | } | |
950 | return retval; | |
951 | } | |
fa46ccb8 | 952 | #endif |
0bd82f5f | 953 | |
fa46ccb8 JK |
954 | static struct crypto_alg aesni_algs[] = { { |
955 | .cra_name = "aes", | |
956 | .cra_driver_name = "aes-aesni", | |
957 | .cra_priority = 300, | |
958 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
959 | .cra_blocksize = AES_BLOCK_SIZE, | |
960 | .cra_ctxsize = sizeof(struct crypto_aes_ctx) + | |
961 | AESNI_ALIGN - 1, | |
962 | .cra_alignmask = 0, | |
963 | .cra_module = THIS_MODULE, | |
964 | .cra_u = { | |
965 | .cipher = { | |
966 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
967 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
968 | .cia_setkey = aes_set_key, | |
969 | .cia_encrypt = aes_encrypt, | |
970 | .cia_decrypt = aes_decrypt | |
971 | } | |
972 | } | |
973 | }, { | |
974 | .cra_name = "__aes-aesni", | |
975 | .cra_driver_name = "__driver-aes-aesni", | |
976 | .cra_priority = 0, | |
977 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
978 | .cra_blocksize = AES_BLOCK_SIZE, | |
979 | .cra_ctxsize = sizeof(struct crypto_aes_ctx) + | |
980 | AESNI_ALIGN - 1, | |
981 | .cra_alignmask = 0, | |
982 | .cra_module = THIS_MODULE, | |
983 | .cra_u = { | |
984 | .cipher = { | |
985 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
986 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
987 | .cia_setkey = aes_set_key, | |
988 | .cia_encrypt = __aes_encrypt, | |
989 | .cia_decrypt = __aes_decrypt | |
990 | } | |
991 | } | |
992 | }, { | |
993 | .cra_name = "__ecb-aes-aesni", | |
994 | .cra_driver_name = "__driver-ecb-aes-aesni", | |
995 | .cra_priority = 0, | |
996 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
997 | .cra_blocksize = AES_BLOCK_SIZE, | |
998 | .cra_ctxsize = sizeof(struct crypto_aes_ctx) + | |
999 | AESNI_ALIGN - 1, | |
1000 | .cra_alignmask = 0, | |
1001 | .cra_type = &crypto_blkcipher_type, | |
1002 | .cra_module = THIS_MODULE, | |
1003 | .cra_u = { | |
1004 | .blkcipher = { | |
1005 | .min_keysize = AES_MIN_KEY_SIZE, | |
1006 | .max_keysize = AES_MAX_KEY_SIZE, | |
1007 | .setkey = aes_set_key, | |
1008 | .encrypt = ecb_encrypt, | |
1009 | .decrypt = ecb_decrypt, | |
1010 | }, | |
1011 | }, | |
1012 | }, { | |
1013 | .cra_name = "__cbc-aes-aesni", | |
1014 | .cra_driver_name = "__driver-cbc-aes-aesni", | |
1015 | .cra_priority = 0, | |
1016 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1017 | .cra_blocksize = AES_BLOCK_SIZE, | |
1018 | .cra_ctxsize = sizeof(struct crypto_aes_ctx) + | |
1019 | AESNI_ALIGN - 1, | |
1020 | .cra_alignmask = 0, | |
1021 | .cra_type = &crypto_blkcipher_type, | |
1022 | .cra_module = THIS_MODULE, | |
1023 | .cra_u = { | |
1024 | .blkcipher = { | |
1025 | .min_keysize = AES_MIN_KEY_SIZE, | |
1026 | .max_keysize = AES_MAX_KEY_SIZE, | |
1027 | .setkey = aes_set_key, | |
1028 | .encrypt = cbc_encrypt, | |
1029 | .decrypt = cbc_decrypt, | |
1030 | }, | |
1031 | }, | |
1032 | }, { | |
1033 | .cra_name = "ecb(aes)", | |
1034 | .cra_driver_name = "ecb-aes-aesni", | |
1035 | .cra_priority = 400, | |
1036 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1037 | .cra_blocksize = AES_BLOCK_SIZE, | |
a9629d71 | 1038 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1039 | .cra_alignmask = 0, |
1040 | .cra_type = &crypto_ablkcipher_type, | |
1041 | .cra_module = THIS_MODULE, | |
1042 | .cra_init = ablk_ecb_init, | |
1043 | .cra_exit = ablk_exit, | |
1044 | .cra_u = { | |
1045 | .ablkcipher = { | |
1046 | .min_keysize = AES_MIN_KEY_SIZE, | |
1047 | .max_keysize = AES_MAX_KEY_SIZE, | |
1048 | .setkey = ablk_set_key, | |
1049 | .encrypt = ablk_encrypt, | |
1050 | .decrypt = ablk_decrypt, | |
1051 | }, | |
1052 | }, | |
1053 | }, { | |
1054 | .cra_name = "cbc(aes)", | |
1055 | .cra_driver_name = "cbc-aes-aesni", | |
1056 | .cra_priority = 400, | |
1057 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1058 | .cra_blocksize = AES_BLOCK_SIZE, | |
a9629d71 | 1059 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1060 | .cra_alignmask = 0, |
1061 | .cra_type = &crypto_ablkcipher_type, | |
1062 | .cra_module = THIS_MODULE, | |
1063 | .cra_init = ablk_cbc_init, | |
1064 | .cra_exit = ablk_exit, | |
1065 | .cra_u = { | |
1066 | .ablkcipher = { | |
1067 | .min_keysize = AES_MIN_KEY_SIZE, | |
1068 | .max_keysize = AES_MAX_KEY_SIZE, | |
1069 | .ivsize = AES_BLOCK_SIZE, | |
1070 | .setkey = ablk_set_key, | |
1071 | .encrypt = ablk_encrypt, | |
1072 | .decrypt = ablk_decrypt, | |
1073 | }, | |
1074 | }, | |
1075 | #ifdef CONFIG_X86_64 | |
1076 | }, { | |
1077 | .cra_name = "__ctr-aes-aesni", | |
1078 | .cra_driver_name = "__driver-ctr-aes-aesni", | |
1079 | .cra_priority = 0, | |
1080 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1081 | .cra_blocksize = 1, | |
1082 | .cra_ctxsize = sizeof(struct crypto_aes_ctx) + | |
1083 | AESNI_ALIGN - 1, | |
1084 | .cra_alignmask = 0, | |
1085 | .cra_type = &crypto_blkcipher_type, | |
1086 | .cra_module = THIS_MODULE, | |
1087 | .cra_u = { | |
1088 | .blkcipher = { | |
1089 | .min_keysize = AES_MIN_KEY_SIZE, | |
1090 | .max_keysize = AES_MAX_KEY_SIZE, | |
1091 | .ivsize = AES_BLOCK_SIZE, | |
1092 | .setkey = aes_set_key, | |
1093 | .encrypt = ctr_crypt, | |
1094 | .decrypt = ctr_crypt, | |
1095 | }, | |
1096 | }, | |
1097 | }, { | |
1098 | .cra_name = "ctr(aes)", | |
1099 | .cra_driver_name = "ctr-aes-aesni", | |
1100 | .cra_priority = 400, | |
1101 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1102 | .cra_blocksize = 1, | |
a9629d71 | 1103 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1104 | .cra_alignmask = 0, |
1105 | .cra_type = &crypto_ablkcipher_type, | |
1106 | .cra_module = THIS_MODULE, | |
1107 | .cra_init = ablk_ctr_init, | |
1108 | .cra_exit = ablk_exit, | |
1109 | .cra_u = { | |
1110 | .ablkcipher = { | |
1111 | .min_keysize = AES_MIN_KEY_SIZE, | |
1112 | .max_keysize = AES_MAX_KEY_SIZE, | |
1113 | .ivsize = AES_BLOCK_SIZE, | |
1114 | .setkey = ablk_set_key, | |
1115 | .encrypt = ablk_encrypt, | |
1116 | .decrypt = ablk_encrypt, | |
1117 | .geniv = "chainiv", | |
1118 | }, | |
1119 | }, | |
1120 | }, { | |
1121 | .cra_name = "__gcm-aes-aesni", | |
1122 | .cra_driver_name = "__driver-gcm-aes-aesni", | |
0bd82f5f TS |
1123 | .cra_priority = 0, |
1124 | .cra_flags = CRYPTO_ALG_TYPE_AEAD, | |
1125 | .cra_blocksize = 1, | |
fa46ccb8 JK |
1126 | .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + |
1127 | AESNI_ALIGN, | |
0bd82f5f TS |
1128 | .cra_alignmask = 0, |
1129 | .cra_type = &crypto_aead_type, | |
1130 | .cra_module = THIS_MODULE, | |
0bd82f5f TS |
1131 | .cra_u = { |
1132 | .aead = { | |
1133 | .encrypt = __driver_rfc4106_encrypt, | |
1134 | .decrypt = __driver_rfc4106_decrypt, | |
1135 | }, | |
1136 | }, | |
fa46ccb8 JK |
1137 | }, { |
1138 | .cra_name = "rfc4106(gcm(aes))", | |
1139 | .cra_driver_name = "rfc4106-gcm-aesni", | |
1140 | .cra_priority = 400, | |
1141 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1142 | .cra_blocksize = 1, | |
1143 | .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + | |
1144 | AESNI_ALIGN, | |
1145 | .cra_alignmask = 0, | |
1146 | .cra_type = &crypto_nivaead_type, | |
1147 | .cra_module = THIS_MODULE, | |
1148 | .cra_init = rfc4106_init, | |
1149 | .cra_exit = rfc4106_exit, | |
1150 | .cra_u = { | |
1151 | .aead = { | |
1152 | .setkey = rfc4106_set_key, | |
1153 | .setauthsize = rfc4106_set_authsize, | |
1154 | .encrypt = rfc4106_encrypt, | |
1155 | .decrypt = rfc4106_decrypt, | |
1156 | .geniv = "seqiv", | |
1157 | .ivsize = 8, | |
1158 | .maxauthsize = 16, | |
1159 | }, | |
1160 | }, | |
1161 | #ifdef HAS_CTR | |
1162 | }, { | |
1163 | .cra_name = "rfc3686(ctr(aes))", | |
1164 | .cra_driver_name = "rfc3686-ctr-aes-aesni", | |
1165 | .cra_priority = 400, | |
1166 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1167 | .cra_blocksize = 1, | |
a9629d71 | 1168 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1169 | .cra_alignmask = 0, |
1170 | .cra_type = &crypto_ablkcipher_type, | |
1171 | .cra_module = THIS_MODULE, | |
1172 | .cra_init = ablk_rfc3686_ctr_init, | |
1173 | .cra_exit = ablk_exit, | |
1174 | .cra_u = { | |
1175 | .ablkcipher = { | |
1176 | .min_keysize = AES_MIN_KEY_SIZE + | |
1177 | CTR_RFC3686_NONCE_SIZE, | |
1178 | .max_keysize = AES_MAX_KEY_SIZE + | |
1179 | CTR_RFC3686_NONCE_SIZE, | |
1180 | .ivsize = CTR_RFC3686_IV_SIZE, | |
1181 | .setkey = ablk_set_key, | |
1182 | .encrypt = ablk_encrypt, | |
1183 | .decrypt = ablk_decrypt, | |
1184 | .geniv = "seqiv", | |
1185 | }, | |
1186 | }, | |
1187 | #endif | |
1188 | #endif | |
023af608 | 1189 | #ifdef HAS_PCBC |
fa46ccb8 | 1190 | }, { |
023af608 JK |
1191 | .cra_name = "pcbc(aes)", |
1192 | .cra_driver_name = "pcbc-aes-aesni", | |
fa46ccb8 JK |
1193 | .cra_priority = 400, |
1194 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1195 | .cra_blocksize = AES_BLOCK_SIZE, | |
a9629d71 | 1196 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1197 | .cra_alignmask = 0, |
1198 | .cra_type = &crypto_ablkcipher_type, | |
1199 | .cra_module = THIS_MODULE, | |
023af608 | 1200 | .cra_init = ablk_pcbc_init, |
fa46ccb8 JK |
1201 | .cra_exit = ablk_exit, |
1202 | .cra_u = { | |
1203 | .ablkcipher = { | |
023af608 JK |
1204 | .min_keysize = AES_MIN_KEY_SIZE, |
1205 | .max_keysize = AES_MAX_KEY_SIZE, | |
fa46ccb8 JK |
1206 | .ivsize = AES_BLOCK_SIZE, |
1207 | .setkey = ablk_set_key, | |
1208 | .encrypt = ablk_encrypt, | |
1209 | .decrypt = ablk_decrypt, | |
1210 | }, | |
1211 | }, | |
1212 | #endif | |
fa46ccb8 | 1213 | }, { |
023af608 JK |
1214 | .cra_name = "__lrw-aes-aesni", |
1215 | .cra_driver_name = "__driver-lrw-aes-aesni", | |
1216 | .cra_priority = 0, | |
1217 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1218 | .cra_blocksize = AES_BLOCK_SIZE, | |
1219 | .cra_ctxsize = sizeof(struct aesni_lrw_ctx), | |
1220 | .cra_alignmask = 0, | |
1221 | .cra_type = &crypto_blkcipher_type, | |
1222 | .cra_module = THIS_MODULE, | |
1223 | .cra_exit = lrw_aesni_exit_tfm, | |
1224 | .cra_u = { | |
1225 | .blkcipher = { | |
1226 | .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE, | |
1227 | .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE, | |
1228 | .ivsize = AES_BLOCK_SIZE, | |
1229 | .setkey = lrw_aesni_setkey, | |
1230 | .encrypt = lrw_encrypt, | |
1231 | .decrypt = lrw_decrypt, | |
1232 | }, | |
1233 | }, | |
1234 | }, { | |
1235 | .cra_name = "__xts-aes-aesni", | |
1236 | .cra_driver_name = "__driver-xts-aes-aesni", | |
1237 | .cra_priority = 0, | |
1238 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1239 | .cra_blocksize = AES_BLOCK_SIZE, | |
1240 | .cra_ctxsize = sizeof(struct aesni_xts_ctx), | |
1241 | .cra_alignmask = 0, | |
1242 | .cra_type = &crypto_blkcipher_type, | |
1243 | .cra_module = THIS_MODULE, | |
1244 | .cra_u = { | |
1245 | .blkcipher = { | |
1246 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
1247 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
1248 | .ivsize = AES_BLOCK_SIZE, | |
1249 | .setkey = xts_aesni_setkey, | |
1250 | .encrypt = xts_encrypt, | |
1251 | .decrypt = xts_decrypt, | |
1252 | }, | |
1253 | }, | |
1254 | }, { | |
1255 | .cra_name = "lrw(aes)", | |
1256 | .cra_driver_name = "lrw-aes-aesni", | |
fa46ccb8 JK |
1257 | .cra_priority = 400, |
1258 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1259 | .cra_blocksize = AES_BLOCK_SIZE, | |
a9629d71 | 1260 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1261 | .cra_alignmask = 0, |
1262 | .cra_type = &crypto_ablkcipher_type, | |
1263 | .cra_module = THIS_MODULE, | |
023af608 | 1264 | .cra_init = ablk_init, |
fa46ccb8 JK |
1265 | .cra_exit = ablk_exit, |
1266 | .cra_u = { | |
1267 | .ablkcipher = { | |
023af608 JK |
1268 | .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE, |
1269 | .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE, | |
fa46ccb8 JK |
1270 | .ivsize = AES_BLOCK_SIZE, |
1271 | .setkey = ablk_set_key, | |
1272 | .encrypt = ablk_encrypt, | |
1273 | .decrypt = ablk_decrypt, | |
1274 | }, | |
1275 | }, | |
fa46ccb8 JK |
1276 | }, { |
1277 | .cra_name = "xts(aes)", | |
1278 | .cra_driver_name = "xts-aes-aesni", | |
1279 | .cra_priority = 400, | |
1280 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1281 | .cra_blocksize = AES_BLOCK_SIZE, | |
a9629d71 | 1282 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
fa46ccb8 JK |
1283 | .cra_alignmask = 0, |
1284 | .cra_type = &crypto_ablkcipher_type, | |
1285 | .cra_module = THIS_MODULE, | |
023af608 | 1286 | .cra_init = ablk_init, |
fa46ccb8 JK |
1287 | .cra_exit = ablk_exit, |
1288 | .cra_u = { | |
1289 | .ablkcipher = { | |
1290 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
1291 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
1292 | .ivsize = AES_BLOCK_SIZE, | |
1293 | .setkey = ablk_set_key, | |
1294 | .encrypt = ablk_encrypt, | |
1295 | .decrypt = ablk_decrypt, | |
1296 | }, | |
1297 | }, | |
fa46ccb8 | 1298 | } }; |
0bd82f5f | 1299 | |
3bd391f0 AK |
1300 | |
1301 | static const struct x86_cpu_id aesni_cpu_id[] = { | |
1302 | X86_FEATURE_MATCH(X86_FEATURE_AES), | |
1303 | {} | |
1304 | }; | |
1305 | MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id); | |
1306 | ||
54b6a1bd HY |
1307 | static int __init aesni_init(void) |
1308 | { | |
7af6c245 | 1309 | int err; |
54b6a1bd | 1310 | |
3bd391f0 | 1311 | if (!x86_match_cpu(aesni_cpu_id)) |
54b6a1bd | 1312 | return -ENODEV; |
0bd82f5f | 1313 | |
fa46ccb8 JK |
1314 | err = crypto_fpu_init(); |
1315 | if (err) | |
1316 | return err; | |
54b6a1bd | 1317 | |
fa46ccb8 | 1318 | return crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs)); |
54b6a1bd HY |
1319 | } |
1320 | ||
1321 | static void __exit aesni_exit(void) | |
1322 | { | |
fa46ccb8 | 1323 | crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs)); |
b23b6451 AL |
1324 | |
1325 | crypto_fpu_exit(); | |
54b6a1bd HY |
1326 | } |
1327 | ||
1328 | module_init(aesni_init); | |
1329 | module_exit(aesni_exit); | |
1330 | ||
1331 | MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized"); | |
1332 | MODULE_LICENSE("GPL"); | |
1333 | MODULE_ALIAS("aes"); |