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Commit | Line | Data |
---|---|---|
23e353c8 JL |
1 | /* |
2 | * CTR: Counter mode | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <crypto/algapi.h> | |
5311f248 | 14 | #include <crypto/ctr.h> |
69d3150c | 15 | #include <crypto/internal/skcipher.h> |
23e353c8 JL |
16 | #include <linux/err.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/random.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/slab.h> | |
23 | ||
23e353c8 JL |
24 | struct crypto_ctr_ctx { |
25 | struct crypto_cipher *child; | |
5311f248 HX |
26 | }; |
27 | ||
28 | struct crypto_rfc3686_ctx { | |
b2b39c2f | 29 | struct crypto_skcipher *child; |
5311f248 | 30 | u8 nonce[CTR_RFC3686_NONCE_SIZE]; |
23e353c8 JL |
31 | }; |
32 | ||
69d3150c JK |
33 | struct crypto_rfc3686_req_ctx { |
34 | u8 iv[CTR_RFC3686_BLOCK_SIZE]; | |
b2b39c2f | 35 | struct skcipher_request subreq CRYPTO_MINALIGN_ATTR; |
69d3150c JK |
36 | }; |
37 | ||
23e353c8 JL |
38 | static int crypto_ctr_setkey(struct crypto_tfm *parent, const u8 *key, |
39 | unsigned int keylen) | |
40 | { | |
41 | struct crypto_ctr_ctx *ctx = crypto_tfm_ctx(parent); | |
42 | struct crypto_cipher *child = ctx->child; | |
5311f248 | 43 | int err; |
23e353c8 JL |
44 | |
45 | crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); | |
46 | crypto_cipher_set_flags(child, crypto_tfm_get_flags(parent) & | |
47 | CRYPTO_TFM_REQ_MASK); | |
48 | err = crypto_cipher_setkey(child, key, keylen); | |
49 | crypto_tfm_set_flags(parent, crypto_cipher_get_flags(child) & | |
50 | CRYPTO_TFM_RES_MASK); | |
51 | ||
52 | return err; | |
53 | } | |
54 | ||
0971eb0d | 55 | static void crypto_ctr_crypt_final(struct blkcipher_walk *walk, |
5311f248 | 56 | struct crypto_cipher *tfm) |
0971eb0d HX |
57 | { |
58 | unsigned int bsize = crypto_cipher_blocksize(tfm); | |
5311f248 HX |
59 | unsigned long alignmask = crypto_cipher_alignmask(tfm); |
60 | u8 *ctrblk = walk->iv; | |
61 | u8 tmp[bsize + alignmask]; | |
62 | u8 *keystream = PTR_ALIGN(tmp + 0, alignmask + 1); | |
0971eb0d HX |
63 | u8 *src = walk->src.virt.addr; |
64 | u8 *dst = walk->dst.virt.addr; | |
65 | unsigned int nbytes = walk->nbytes; | |
66 | ||
67 | crypto_cipher_encrypt_one(tfm, keystream, ctrblk); | |
68 | crypto_xor(keystream, src, nbytes); | |
69 | memcpy(dst, keystream, nbytes); | |
5311f248 HX |
70 | |
71 | crypto_inc(ctrblk, bsize); | |
0971eb0d HX |
72 | } |
73 | ||
23e353c8 | 74 | static int crypto_ctr_crypt_segment(struct blkcipher_walk *walk, |
5311f248 | 75 | struct crypto_cipher *tfm) |
23e353c8 JL |
76 | { |
77 | void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = | |
78 | crypto_cipher_alg(tfm)->cia_encrypt; | |
79 | unsigned int bsize = crypto_cipher_blocksize(tfm); | |
5311f248 | 80 | u8 *ctrblk = walk->iv; |
23e353c8 JL |
81 | u8 *src = walk->src.virt.addr; |
82 | u8 *dst = walk->dst.virt.addr; | |
83 | unsigned int nbytes = walk->nbytes; | |
84 | ||
85 | do { | |
86 | /* create keystream */ | |
0971eb0d HX |
87 | fn(crypto_cipher_tfm(tfm), dst, ctrblk); |
88 | crypto_xor(dst, src, bsize); | |
23e353c8 JL |
89 | |
90 | /* increment counter in counterblock */ | |
5311f248 | 91 | crypto_inc(ctrblk, bsize); |
23e353c8 | 92 | |
23e353c8 JL |
93 | src += bsize; |
94 | dst += bsize; | |
0971eb0d | 95 | } while ((nbytes -= bsize) >= bsize); |
23e353c8 | 96 | |
0971eb0d | 97 | return nbytes; |
23e353c8 JL |
98 | } |
99 | ||
100 | static int crypto_ctr_crypt_inplace(struct blkcipher_walk *walk, | |
5311f248 | 101 | struct crypto_cipher *tfm) |
23e353c8 JL |
102 | { |
103 | void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = | |
104 | crypto_cipher_alg(tfm)->cia_encrypt; | |
105 | unsigned int bsize = crypto_cipher_blocksize(tfm); | |
5311f248 | 106 | unsigned long alignmask = crypto_cipher_alignmask(tfm); |
23e353c8 | 107 | unsigned int nbytes = walk->nbytes; |
5311f248 | 108 | u8 *ctrblk = walk->iv; |
23e353c8 | 109 | u8 *src = walk->src.virt.addr; |
5311f248 HX |
110 | u8 tmp[bsize + alignmask]; |
111 | u8 *keystream = PTR_ALIGN(tmp + 0, alignmask + 1); | |
23e353c8 JL |
112 | |
113 | do { | |
114 | /* create keystream */ | |
115 | fn(crypto_cipher_tfm(tfm), keystream, ctrblk); | |
0971eb0d | 116 | crypto_xor(src, keystream, bsize); |
23e353c8 JL |
117 | |
118 | /* increment counter in counterblock */ | |
5311f248 | 119 | crypto_inc(ctrblk, bsize); |
23e353c8 | 120 | |
23e353c8 | 121 | src += bsize; |
0971eb0d | 122 | } while ((nbytes -= bsize) >= bsize); |
23e353c8 | 123 | |
0971eb0d | 124 | return nbytes; |
23e353c8 JL |
125 | } |
126 | ||
127 | static int crypto_ctr_crypt(struct blkcipher_desc *desc, | |
128 | struct scatterlist *dst, struct scatterlist *src, | |
129 | unsigned int nbytes) | |
130 | { | |
131 | struct blkcipher_walk walk; | |
132 | struct crypto_blkcipher *tfm = desc->tfm; | |
133 | struct crypto_ctr_ctx *ctx = crypto_blkcipher_ctx(tfm); | |
134 | struct crypto_cipher *child = ctx->child; | |
135 | unsigned int bsize = crypto_cipher_blocksize(child); | |
23e353c8 JL |
136 | int err; |
137 | ||
138 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
139 | err = blkcipher_walk_virt_block(desc, &walk, bsize); | |
140 | ||
0971eb0d | 141 | while (walk.nbytes >= bsize) { |
23e353c8 | 142 | if (walk.src.virt.addr == walk.dst.virt.addr) |
5311f248 | 143 | nbytes = crypto_ctr_crypt_inplace(&walk, child); |
23e353c8 | 144 | else |
5311f248 | 145 | nbytes = crypto_ctr_crypt_segment(&walk, child); |
23e353c8 JL |
146 | |
147 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
148 | } | |
0971eb0d HX |
149 | |
150 | if (walk.nbytes) { | |
5311f248 | 151 | crypto_ctr_crypt_final(&walk, child); |
0971eb0d HX |
152 | err = blkcipher_walk_done(desc, &walk, 0); |
153 | } | |
154 | ||
23e353c8 JL |
155 | return err; |
156 | } | |
157 | ||
158 | static int crypto_ctr_init_tfm(struct crypto_tfm *tfm) | |
159 | { | |
160 | struct crypto_instance *inst = (void *)tfm->__crt_alg; | |
5311f248 | 161 | struct crypto_spawn *spawn = crypto_instance_ctx(inst); |
23e353c8 JL |
162 | struct crypto_ctr_ctx *ctx = crypto_tfm_ctx(tfm); |
163 | struct crypto_cipher *cipher; | |
164 | ||
5311f248 | 165 | cipher = crypto_spawn_cipher(spawn); |
23e353c8 JL |
166 | if (IS_ERR(cipher)) |
167 | return PTR_ERR(cipher); | |
168 | ||
169 | ctx->child = cipher; | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static void crypto_ctr_exit_tfm(struct crypto_tfm *tfm) | |
175 | { | |
176 | struct crypto_ctr_ctx *ctx = crypto_tfm_ctx(tfm); | |
177 | ||
23e353c8 JL |
178 | crypto_free_cipher(ctx->child); |
179 | } | |
180 | ||
181 | static struct crypto_instance *crypto_ctr_alloc(struct rtattr **tb) | |
182 | { | |
183 | struct crypto_instance *inst; | |
184 | struct crypto_alg *alg; | |
23e353c8 JL |
185 | int err; |
186 | ||
187 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_BLKCIPHER); | |
188 | if (err) | |
189 | return ERR_PTR(err); | |
190 | ||
191 | alg = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_CIPHER, | |
192 | CRYPTO_ALG_TYPE_MASK); | |
193 | if (IS_ERR(alg)) | |
8db05078 | 194 | return ERR_CAST(alg); |
23e353c8 | 195 | |
5311f248 | 196 | /* Block size must be >= 4 bytes. */ |
23e353c8 | 197 | err = -EINVAL; |
5311f248 | 198 | if (alg->cra_blocksize < 4) |
23e353c8 JL |
199 | goto out_put_alg; |
200 | ||
3f8214ea | 201 | /* If this is false we'd fail the alignment of crypto_inc. */ |
5311f248 | 202 | if (alg->cra_blocksize % 4) |
3f8214ea HX |
203 | goto out_put_alg; |
204 | ||
5311f248 HX |
205 | inst = crypto_alloc_instance("ctr", alg); |
206 | if (IS_ERR(inst)) | |
207 | goto out; | |
23e353c8 | 208 | |
23e353c8 JL |
209 | inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER; |
210 | inst->alg.cra_priority = alg->cra_priority; | |
211 | inst->alg.cra_blocksize = 1; | |
0971eb0d | 212 | inst->alg.cra_alignmask = alg->cra_alignmask | (__alignof__(u32) - 1); |
23e353c8 JL |
213 | inst->alg.cra_type = &crypto_blkcipher_type; |
214 | ||
5311f248 HX |
215 | inst->alg.cra_blkcipher.ivsize = alg->cra_blocksize; |
216 | inst->alg.cra_blkcipher.min_keysize = alg->cra_cipher.cia_min_keysize; | |
217 | inst->alg.cra_blkcipher.max_keysize = alg->cra_cipher.cia_max_keysize; | |
23e353c8 JL |
218 | |
219 | inst->alg.cra_ctxsize = sizeof(struct crypto_ctr_ctx); | |
220 | ||
221 | inst->alg.cra_init = crypto_ctr_init_tfm; | |
222 | inst->alg.cra_exit = crypto_ctr_exit_tfm; | |
223 | ||
224 | inst->alg.cra_blkcipher.setkey = crypto_ctr_setkey; | |
225 | inst->alg.cra_blkcipher.encrypt = crypto_ctr_crypt; | |
226 | inst->alg.cra_blkcipher.decrypt = crypto_ctr_crypt; | |
227 | ||
aef27136 HX |
228 | inst->alg.cra_blkcipher.geniv = "chainiv"; |
229 | ||
5311f248 | 230 | out: |
23e353c8 | 231 | crypto_mod_put(alg); |
23e353c8 | 232 | return inst; |
5311f248 HX |
233 | |
234 | out_put_alg: | |
235 | inst = ERR_PTR(err); | |
236 | goto out; | |
23e353c8 JL |
237 | } |
238 | ||
239 | static void crypto_ctr_free(struct crypto_instance *inst) | |
240 | { | |
5311f248 | 241 | crypto_drop_spawn(crypto_instance_ctx(inst)); |
23e353c8 JL |
242 | kfree(inst); |
243 | } | |
244 | ||
245 | static struct crypto_template crypto_ctr_tmpl = { | |
246 | .name = "ctr", | |
247 | .alloc = crypto_ctr_alloc, | |
248 | .free = crypto_ctr_free, | |
249 | .module = THIS_MODULE, | |
250 | }; | |
251 | ||
b2b39c2f | 252 | static int crypto_rfc3686_setkey(struct crypto_skcipher *parent, |
69d3150c | 253 | const u8 *key, unsigned int keylen) |
5311f248 | 254 | { |
b2b39c2f HX |
255 | struct crypto_rfc3686_ctx *ctx = crypto_skcipher_ctx(parent); |
256 | struct crypto_skcipher *child = ctx->child; | |
5311f248 HX |
257 | int err; |
258 | ||
259 | /* the nonce is stored in bytes at end of key */ | |
260 | if (keylen < CTR_RFC3686_NONCE_SIZE) | |
261 | return -EINVAL; | |
262 | ||
263 | memcpy(ctx->nonce, key + (keylen - CTR_RFC3686_NONCE_SIZE), | |
264 | CTR_RFC3686_NONCE_SIZE); | |
265 | ||
266 | keylen -= CTR_RFC3686_NONCE_SIZE; | |
267 | ||
b2b39c2f HX |
268 | crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
269 | crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) & | |
270 | CRYPTO_TFM_REQ_MASK); | |
271 | err = crypto_skcipher_setkey(child, key, keylen); | |
272 | crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) & | |
273 | CRYPTO_TFM_RES_MASK); | |
5311f248 HX |
274 | |
275 | return err; | |
276 | } | |
277 | ||
b2b39c2f | 278 | static int crypto_rfc3686_crypt(struct skcipher_request *req) |
5311f248 | 279 | { |
b2b39c2f HX |
280 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
281 | struct crypto_rfc3686_ctx *ctx = crypto_skcipher_ctx(tfm); | |
282 | struct crypto_skcipher *child = ctx->child; | |
283 | unsigned long align = crypto_skcipher_alignmask(tfm); | |
69d3150c | 284 | struct crypto_rfc3686_req_ctx *rctx = |
b2b39c2f HX |
285 | (void *)PTR_ALIGN((u8 *)skcipher_request_ctx(req), align + 1); |
286 | struct skcipher_request *subreq = &rctx->subreq; | |
69d3150c | 287 | u8 *iv = rctx->iv; |
5311f248 HX |
288 | |
289 | /* set up counter block */ | |
290 | memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); | |
b2b39c2f | 291 | memcpy(iv + CTR_RFC3686_NONCE_SIZE, req->iv, CTR_RFC3686_IV_SIZE); |
5311f248 HX |
292 | |
293 | /* initialize counter portion of counter block */ | |
294 | *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = | |
295 | cpu_to_be32(1); | |
296 | ||
b2b39c2f HX |
297 | skcipher_request_set_tfm(subreq, child); |
298 | skcipher_request_set_callback(subreq, req->base.flags, | |
299 | req->base.complete, req->base.data); | |
300 | skcipher_request_set_crypt(subreq, req->src, req->dst, | |
301 | req->cryptlen, iv); | |
5311f248 | 302 | |
b2b39c2f | 303 | return crypto_skcipher_encrypt(subreq); |
5311f248 HX |
304 | } |
305 | ||
b2b39c2f | 306 | static int crypto_rfc3686_init_tfm(struct crypto_skcipher *tfm) |
5311f248 | 307 | { |
b2b39c2f HX |
308 | struct skcipher_instance *inst = skcipher_alg_instance(tfm); |
309 | struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst); | |
310 | struct crypto_rfc3686_ctx *ctx = crypto_skcipher_ctx(tfm); | |
311 | struct crypto_skcipher *cipher; | |
69d3150c | 312 | unsigned long align; |
b2b39c2f | 313 | unsigned int reqsize; |
5311f248 | 314 | |
60425a8b | 315 | cipher = crypto_spawn_skcipher(spawn); |
5311f248 HX |
316 | if (IS_ERR(cipher)) |
317 | return PTR_ERR(cipher); | |
318 | ||
319 | ctx->child = cipher; | |
320 | ||
b2b39c2f | 321 | align = crypto_skcipher_alignmask(tfm); |
69d3150c | 322 | align &= ~(crypto_tfm_ctx_alignment() - 1); |
b2b39c2f HX |
323 | reqsize = align + sizeof(struct crypto_rfc3686_req_ctx) + |
324 | crypto_skcipher_reqsize(cipher); | |
325 | crypto_skcipher_set_reqsize(tfm, reqsize); | |
69d3150c | 326 | |
5311f248 HX |
327 | return 0; |
328 | } | |
329 | ||
b2b39c2f | 330 | static void crypto_rfc3686_exit_tfm(struct crypto_skcipher *tfm) |
5311f248 | 331 | { |
b2b39c2f HX |
332 | struct crypto_rfc3686_ctx *ctx = crypto_skcipher_ctx(tfm); |
333 | ||
334 | crypto_free_skcipher(ctx->child); | |
335 | } | |
5311f248 | 336 | |
b2b39c2f HX |
337 | static void crypto_rfc3686_free(struct skcipher_instance *inst) |
338 | { | |
339 | struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst); | |
340 | ||
341 | crypto_drop_skcipher(spawn); | |
342 | kfree(inst); | |
5311f248 HX |
343 | } |
344 | ||
b2b39c2f HX |
345 | static int crypto_rfc3686_create(struct crypto_template *tmpl, |
346 | struct rtattr **tb) | |
5311f248 | 347 | { |
69d3150c | 348 | struct crypto_attr_type *algt; |
b2b39c2f HX |
349 | struct skcipher_instance *inst; |
350 | struct skcipher_alg *alg; | |
69d3150c JK |
351 | struct crypto_skcipher_spawn *spawn; |
352 | const char *cipher_name; | |
5311f248 HX |
353 | int err; |
354 | ||
69d3150c | 355 | algt = crypto_get_attr_type(tb); |
69d3150c | 356 | if (IS_ERR(algt)) |
b2b39c2f | 357 | return PTR_ERR(algt); |
5311f248 | 358 | |
b2b39c2f HX |
359 | if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) |
360 | return -EINVAL; | |
69d3150c JK |
361 | |
362 | cipher_name = crypto_attr_alg_name(tb[1]); | |
69d3150c | 363 | if (IS_ERR(cipher_name)) |
b2b39c2f | 364 | return PTR_ERR(cipher_name); |
5311f248 | 365 | |
69d3150c JK |
366 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); |
367 | if (!inst) | |
b2b39c2f | 368 | return -ENOMEM; |
69d3150c | 369 | |
b2b39c2f | 370 | spawn = skcipher_instance_ctx(inst); |
69d3150c | 371 | |
b2b39c2f | 372 | crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst)); |
a35528ec EB |
373 | err = crypto_grab_skcipher(spawn, cipher_name, 0, |
374 | crypto_requires_sync(algt->type, | |
375 | algt->mask)); | |
69d3150c JK |
376 | if (err) |
377 | goto err_free_inst; | |
378 | ||
b2b39c2f | 379 | alg = crypto_spawn_skcipher_alg(spawn); |
69d3150c | 380 | |
5311f248 HX |
381 | /* We only support 16-byte blocks. */ |
382 | err = -EINVAL; | |
b2b39c2f | 383 | if (crypto_skcipher_alg_ivsize(alg) != CTR_RFC3686_BLOCK_SIZE) |
69d3150c | 384 | goto err_drop_spawn; |
5311f248 HX |
385 | |
386 | /* Not a stream cipher? */ | |
b2b39c2f | 387 | if (alg->base.cra_blocksize != 1) |
69d3150c | 388 | goto err_drop_spawn; |
5311f248 | 389 | |
69d3150c | 390 | err = -ENAMETOOLONG; |
b2b39c2f HX |
391 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
392 | "rfc3686(%s)", alg->base.cra_name) >= CRYPTO_MAX_ALG_NAME) | |
69d3150c | 393 | goto err_drop_spawn; |
b2b39c2f HX |
394 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
395 | "rfc3686(%s)", alg->base.cra_driver_name) >= | |
396 | CRYPTO_MAX_ALG_NAME) | |
69d3150c | 397 | goto err_drop_spawn; |
5311f248 | 398 | |
b2b39c2f HX |
399 | inst->alg.base.cra_priority = alg->base.cra_priority; |
400 | inst->alg.base.cra_blocksize = 1; | |
401 | inst->alg.base.cra_alignmask = alg->base.cra_alignmask; | |
5311f248 | 402 | |
b2b39c2f | 403 | inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; |
69d3150c | 404 | |
b2b39c2f HX |
405 | inst->alg.ivsize = CTR_RFC3686_IV_SIZE; |
406 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); | |
407 | inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg) + | |
408 | CTR_RFC3686_NONCE_SIZE; | |
409 | inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg) + | |
410 | CTR_RFC3686_NONCE_SIZE; | |
5311f248 | 411 | |
b2b39c2f HX |
412 | inst->alg.setkey = crypto_rfc3686_setkey; |
413 | inst->alg.encrypt = crypto_rfc3686_crypt; | |
414 | inst->alg.decrypt = crypto_rfc3686_crypt; | |
69d3150c | 415 | |
b2b39c2f | 416 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc3686_ctx); |
0a270321 | 417 | |
b2b39c2f HX |
418 | inst->alg.init = crypto_rfc3686_init_tfm; |
419 | inst->alg.exit = crypto_rfc3686_exit_tfm; | |
5311f248 | 420 | |
b2b39c2f | 421 | inst->free = crypto_rfc3686_free; |
5311f248 | 422 | |
b2b39c2f HX |
423 | err = skcipher_register_instance(tmpl, inst); |
424 | if (err) | |
425 | goto err_drop_spawn; | |
426 | ||
427 | out: | |
428 | return err; | |
5311f248 | 429 | |
69d3150c JK |
430 | err_drop_spawn: |
431 | crypto_drop_skcipher(spawn); | |
432 | err_free_inst: | |
433 | kfree(inst); | |
b2b39c2f | 434 | goto out; |
5311f248 HX |
435 | } |
436 | ||
437 | static struct crypto_template crypto_rfc3686_tmpl = { | |
438 | .name = "rfc3686", | |
b2b39c2f | 439 | .create = crypto_rfc3686_create, |
5311f248 HX |
440 | .module = THIS_MODULE, |
441 | }; | |
442 | ||
23e353c8 JL |
443 | static int __init crypto_ctr_module_init(void) |
444 | { | |
5311f248 HX |
445 | int err; |
446 | ||
447 | err = crypto_register_template(&crypto_ctr_tmpl); | |
448 | if (err) | |
449 | goto out; | |
450 | ||
451 | err = crypto_register_template(&crypto_rfc3686_tmpl); | |
452 | if (err) | |
453 | goto out_drop_ctr; | |
454 | ||
455 | out: | |
456 | return err; | |
457 | ||
458 | out_drop_ctr: | |
459 | crypto_unregister_template(&crypto_ctr_tmpl); | |
460 | goto out; | |
23e353c8 JL |
461 | } |
462 | ||
463 | static void __exit crypto_ctr_module_exit(void) | |
464 | { | |
5311f248 | 465 | crypto_unregister_template(&crypto_rfc3686_tmpl); |
23e353c8 JL |
466 | crypto_unregister_template(&crypto_ctr_tmpl); |
467 | } | |
468 | ||
469 | module_init(crypto_ctr_module_init); | |
470 | module_exit(crypto_ctr_module_exit); | |
471 | ||
472 | MODULE_LICENSE("GPL"); | |
473 | MODULE_DESCRIPTION("CTR Counter block mode"); | |
5d26a105 | 474 | MODULE_ALIAS_CRYPTO("rfc3686"); |
4943ba16 | 475 | MODULE_ALIAS_CRYPTO("ctr"); |