Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Software async crypto daemon. |
| 3 | * |
| 4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| 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> |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 14 | #include <crypto/internal/hash.h> |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 15 | #include <crypto/cryptd.h> |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 16 | #include <crypto/crypto_wq.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 17 | #include <linux/err.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/kernel.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 20 | #include <linux/list.h> |
| 21 | #include <linux/module.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 22 | #include <linux/scatterlist.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/slab.h> |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 25 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 26 | #define CRYPTD_MAX_CPU_QLEN 100 |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 27 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 28 | struct cryptd_cpu_queue { |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 29 | struct crypto_queue queue; |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 30 | struct work_struct work; |
| 31 | }; |
| 32 | |
| 33 | struct cryptd_queue { |
| 34 | struct cryptd_cpu_queue *cpu_queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 35 | }; |
| 36 | |
| 37 | struct cryptd_instance_ctx { |
| 38 | struct crypto_spawn spawn; |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 39 | struct cryptd_queue *queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 40 | }; |
| 41 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 42 | struct hashd_instance_ctx { |
| 43 | struct crypto_shash_spawn spawn; |
| 44 | struct cryptd_queue *queue; |
| 45 | }; |
| 46 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 47 | struct cryptd_blkcipher_ctx { |
| 48 | struct crypto_blkcipher *child; |
| 49 | }; |
| 50 | |
| 51 | struct cryptd_blkcipher_request_ctx { |
| 52 | crypto_completion_t complete; |
| 53 | }; |
| 54 | |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 55 | struct cryptd_hash_ctx { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 56 | struct crypto_shash *child; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | struct cryptd_hash_request_ctx { |
| 60 | crypto_completion_t complete; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 61 | struct shash_desc desc; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 62 | }; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 63 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 64 | static void cryptd_queue_worker(struct work_struct *work); |
| 65 | |
| 66 | static int cryptd_init_queue(struct cryptd_queue *queue, |
| 67 | unsigned int max_cpu_qlen) |
| 68 | { |
| 69 | int cpu; |
| 70 | struct cryptd_cpu_queue *cpu_queue; |
| 71 | |
| 72 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); |
| 73 | if (!queue->cpu_queue) |
| 74 | return -ENOMEM; |
| 75 | for_each_possible_cpu(cpu) { |
| 76 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 77 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); |
| 78 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); |
| 79 | } |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static void cryptd_fini_queue(struct cryptd_queue *queue) |
| 84 | { |
| 85 | int cpu; |
| 86 | struct cryptd_cpu_queue *cpu_queue; |
| 87 | |
| 88 | for_each_possible_cpu(cpu) { |
| 89 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 90 | BUG_ON(cpu_queue->queue.qlen); |
| 91 | } |
| 92 | free_percpu(queue->cpu_queue); |
| 93 | } |
| 94 | |
| 95 | static int cryptd_enqueue_request(struct cryptd_queue *queue, |
| 96 | struct crypto_async_request *request) |
| 97 | { |
| 98 | int cpu, err; |
| 99 | struct cryptd_cpu_queue *cpu_queue; |
| 100 | |
| 101 | cpu = get_cpu(); |
| 102 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 103 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
| 104 | queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
| 105 | put_cpu(); |
| 106 | |
| 107 | return err; |
| 108 | } |
| 109 | |
| 110 | /* Called in workqueue context, do one real cryption work (via |
| 111 | * req->complete) and reschedule itself if there are more work to |
| 112 | * do. */ |
| 113 | static void cryptd_queue_worker(struct work_struct *work) |
| 114 | { |
| 115 | struct cryptd_cpu_queue *cpu_queue; |
| 116 | struct crypto_async_request *req, *backlog; |
| 117 | |
| 118 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); |
| 119 | /* Only handle one request at a time to avoid hogging crypto |
| 120 | * workqueue. preempt_disable/enable is used to prevent |
| 121 | * being preempted by cryptd_enqueue_request() */ |
| 122 | preempt_disable(); |
| 123 | backlog = crypto_get_backlog(&cpu_queue->queue); |
| 124 | req = crypto_dequeue_request(&cpu_queue->queue); |
| 125 | preempt_enable(); |
| 126 | |
| 127 | if (!req) |
| 128 | return; |
| 129 | |
| 130 | if (backlog) |
| 131 | backlog->complete(backlog, -EINPROGRESS); |
| 132 | req->complete(req, 0); |
| 133 | |
| 134 | if (cpu_queue->queue.qlen) |
| 135 | queue_work(kcrypto_wq, &cpu_queue->work); |
| 136 | } |
| 137 | |
| 138 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 139 | { |
| 140 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 141 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 142 | return ictx->queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent, |
| 146 | const u8 *key, unsigned int keylen) |
| 147 | { |
| 148 | struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent); |
| 149 | struct crypto_blkcipher *child = ctx->child; |
| 150 | int err; |
| 151 | |
| 152 | crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 153 | crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) & |
| 154 | CRYPTO_TFM_REQ_MASK); |
| 155 | err = crypto_blkcipher_setkey(child, key, keylen); |
| 156 | crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) & |
| 157 | CRYPTO_TFM_RES_MASK); |
| 158 | return err; |
| 159 | } |
| 160 | |
| 161 | static void cryptd_blkcipher_crypt(struct ablkcipher_request *req, |
| 162 | struct crypto_blkcipher *child, |
| 163 | int err, |
| 164 | int (*crypt)(struct blkcipher_desc *desc, |
| 165 | struct scatterlist *dst, |
| 166 | struct scatterlist *src, |
| 167 | unsigned int len)) |
| 168 | { |
| 169 | struct cryptd_blkcipher_request_ctx *rctx; |
| 170 | struct blkcipher_desc desc; |
| 171 | |
| 172 | rctx = ablkcipher_request_ctx(req); |
| 173 | |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 174 | if (unlikely(err == -EINPROGRESS)) |
| 175 | goto out; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 176 | |
| 177 | desc.tfm = child; |
| 178 | desc.info = req->info; |
| 179 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 180 | |
| 181 | err = crypt(&desc, req->dst, req->src, req->nbytes); |
| 182 | |
| 183 | req->base.complete = rctx->complete; |
| 184 | |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 185 | out: |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 186 | local_bh_disable(); |
Herbert Xu | 93aa7f8 | 2008-05-07 21:10:13 +0800 | [diff] [blame] | 187 | rctx->complete(&req->base, err); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 188 | local_bh_enable(); |
| 189 | } |
| 190 | |
| 191 | static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err) |
| 192 | { |
| 193 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); |
| 194 | struct crypto_blkcipher *child = ctx->child; |
| 195 | |
| 196 | cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, |
| 197 | crypto_blkcipher_crt(child)->encrypt); |
| 198 | } |
| 199 | |
| 200 | static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err) |
| 201 | { |
| 202 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); |
| 203 | struct crypto_blkcipher *child = ctx->child; |
| 204 | |
| 205 | cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, |
| 206 | crypto_blkcipher_crt(child)->decrypt); |
| 207 | } |
| 208 | |
| 209 | static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req, |
| 210 | crypto_completion_t complete) |
| 211 | { |
| 212 | struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req); |
| 213 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 214 | struct cryptd_queue *queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 215 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 216 | queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm)); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 217 | rctx->complete = req->base.complete; |
| 218 | req->base.complete = complete; |
| 219 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 220 | return cryptd_enqueue_request(queue, &req->base); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req) |
| 224 | { |
| 225 | return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt); |
| 226 | } |
| 227 | |
| 228 | static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req) |
| 229 | { |
| 230 | return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt); |
| 231 | } |
| 232 | |
| 233 | static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm) |
| 234 | { |
| 235 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 236 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 237 | struct crypto_spawn *spawn = &ictx->spawn; |
| 238 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); |
| 239 | struct crypto_blkcipher *cipher; |
| 240 | |
| 241 | cipher = crypto_spawn_blkcipher(spawn); |
| 242 | if (IS_ERR(cipher)) |
| 243 | return PTR_ERR(cipher); |
| 244 | |
| 245 | ctx->child = cipher; |
| 246 | tfm->crt_ablkcipher.reqsize = |
| 247 | sizeof(struct cryptd_blkcipher_request_ctx); |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm) |
| 252 | { |
| 253 | struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 254 | |
| 255 | crypto_free_blkcipher(ctx->child); |
| 256 | } |
| 257 | |
| 258 | static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg, |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 259 | unsigned int tail) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 260 | { |
| 261 | struct crypto_instance *inst; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 262 | int err; |
| 263 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 264 | inst = kzalloc(sizeof(*inst) + tail, GFP_KERNEL); |
Julia Lawall | b1145ce | 2008-04-30 00:27:14 +0800 | [diff] [blame] | 265 | if (!inst) { |
| 266 | inst = ERR_PTR(-ENOMEM); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 267 | goto out; |
Julia Lawall | b1145ce | 2008-04-30 00:27:14 +0800 | [diff] [blame] | 268 | } |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 269 | |
| 270 | err = -ENAMETOOLONG; |
| 271 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 272 | "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
| 273 | goto out_free_inst; |
| 274 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 275 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); |
| 276 | |
| 277 | inst->alg.cra_priority = alg->cra_priority + 50; |
| 278 | inst->alg.cra_blocksize = alg->cra_blocksize; |
| 279 | inst->alg.cra_alignmask = alg->cra_alignmask; |
| 280 | |
| 281 | out: |
| 282 | return inst; |
| 283 | |
| 284 | out_free_inst: |
| 285 | kfree(inst); |
| 286 | inst = ERR_PTR(err); |
| 287 | goto out; |
| 288 | } |
| 289 | |
| 290 | static struct crypto_instance *cryptd_alloc_blkcipher( |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 291 | struct rtattr **tb, struct cryptd_queue *queue) |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 292 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 293 | struct cryptd_instance_ctx *ctx; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 294 | struct crypto_instance *inst; |
| 295 | struct crypto_alg *alg; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 296 | int err; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 297 | |
| 298 | alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER, |
Herbert Xu | 332f884 | 2007-11-15 22:36:07 +0800 | [diff] [blame] | 299 | CRYPTO_ALG_TYPE_MASK); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 300 | if (IS_ERR(alg)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 301 | return ERR_CAST(alg); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 302 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 303 | inst = cryptd_alloc_instance(alg, sizeof(*ctx)); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 304 | if (IS_ERR(inst)) |
| 305 | goto out_put_alg; |
| 306 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 307 | ctx = crypto_instance_ctx(inst); |
| 308 | ctx->queue = queue; |
| 309 | |
| 310 | err = crypto_init_spawn(&ctx->spawn, alg, inst, |
| 311 | CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
| 312 | if (err) |
| 313 | goto out_free_inst; |
| 314 | |
Herbert Xu | 332f884 | 2007-11-15 22:36:07 +0800 | [diff] [blame] | 315 | inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 316 | inst->alg.cra_type = &crypto_ablkcipher_type; |
| 317 | |
| 318 | inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize; |
| 319 | inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize; |
| 320 | inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize; |
| 321 | |
Herbert Xu | 927eead | 2007-11-27 21:15:31 +0800 | [diff] [blame] | 322 | inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv; |
| 323 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 324 | inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx); |
| 325 | |
| 326 | inst->alg.cra_init = cryptd_blkcipher_init_tfm; |
| 327 | inst->alg.cra_exit = cryptd_blkcipher_exit_tfm; |
| 328 | |
| 329 | inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey; |
| 330 | inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue; |
| 331 | inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue; |
| 332 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 333 | out_put_alg: |
| 334 | crypto_mod_put(alg); |
| 335 | return inst; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 336 | |
| 337 | out_free_inst: |
| 338 | kfree(inst); |
| 339 | inst = ERR_PTR(err); |
| 340 | goto out_put_alg; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 341 | } |
| 342 | |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 343 | static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) |
| 344 | { |
| 345 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 346 | struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 347 | struct crypto_shash_spawn *spawn = &ictx->spawn; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 348 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 349 | struct crypto_shash *hash; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 350 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 351 | hash = crypto_spawn_shash(spawn); |
| 352 | if (IS_ERR(hash)) |
| 353 | return PTR_ERR(hash); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 354 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 355 | ctx->child = hash; |
Herbert Xu | 0d6669e | 2009-07-12 23:06:33 +0800 | [diff] [blame^] | 356 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| 357 | sizeof(struct cryptd_hash_request_ctx) + |
| 358 | crypto_shash_descsize(hash)); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) |
| 363 | { |
| 364 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 365 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 366 | crypto_free_shash(ctx->child); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | static int cryptd_hash_setkey(struct crypto_ahash *parent, |
| 370 | const u8 *key, unsigned int keylen) |
| 371 | { |
| 372 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 373 | struct crypto_shash *child = ctx->child; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 374 | int err; |
| 375 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 376 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 377 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & |
| 378 | CRYPTO_TFM_REQ_MASK); |
| 379 | err = crypto_shash_setkey(child, key, keylen); |
| 380 | crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) & |
| 381 | CRYPTO_TFM_RES_MASK); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 382 | return err; |
| 383 | } |
| 384 | |
| 385 | static int cryptd_hash_enqueue(struct ahash_request *req, |
| 386 | crypto_completion_t complete) |
| 387 | { |
| 388 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 389 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 390 | struct cryptd_queue *queue = |
| 391 | cryptd_get_queue(crypto_ahash_tfm(tfm)); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 392 | |
| 393 | rctx->complete = req->base.complete; |
| 394 | req->base.complete = complete; |
| 395 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 396 | return cryptd_enqueue_request(queue, &req->base); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | static void cryptd_hash_init(struct crypto_async_request *req_async, int err) |
| 400 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 401 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 402 | struct crypto_shash *child = ctx->child; |
| 403 | struct ahash_request *req = ahash_request_cast(req_async); |
| 404 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 405 | struct shash_desc *desc = &rctx->desc; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 406 | |
| 407 | if (unlikely(err == -EINPROGRESS)) |
| 408 | goto out; |
| 409 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 410 | desc->tfm = child; |
| 411 | desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 412 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 413 | err = crypto_shash_init(desc); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 414 | |
| 415 | req->base.complete = rctx->complete; |
| 416 | |
| 417 | out: |
| 418 | local_bh_disable(); |
| 419 | rctx->complete(&req->base, err); |
| 420 | local_bh_enable(); |
| 421 | } |
| 422 | |
| 423 | static int cryptd_hash_init_enqueue(struct ahash_request *req) |
| 424 | { |
| 425 | return cryptd_hash_enqueue(req, cryptd_hash_init); |
| 426 | } |
| 427 | |
| 428 | static void cryptd_hash_update(struct crypto_async_request *req_async, int err) |
| 429 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 430 | struct ahash_request *req = ahash_request_cast(req_async); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 431 | struct cryptd_hash_request_ctx *rctx; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 432 | |
| 433 | rctx = ahash_request_ctx(req); |
| 434 | |
| 435 | if (unlikely(err == -EINPROGRESS)) |
| 436 | goto out; |
| 437 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 438 | err = shash_ahash_update(req, &rctx->desc); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 439 | |
| 440 | req->base.complete = rctx->complete; |
| 441 | |
| 442 | out: |
| 443 | local_bh_disable(); |
| 444 | rctx->complete(&req->base, err); |
| 445 | local_bh_enable(); |
| 446 | } |
| 447 | |
| 448 | static int cryptd_hash_update_enqueue(struct ahash_request *req) |
| 449 | { |
| 450 | return cryptd_hash_enqueue(req, cryptd_hash_update); |
| 451 | } |
| 452 | |
| 453 | static void cryptd_hash_final(struct crypto_async_request *req_async, int err) |
| 454 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 455 | struct ahash_request *req = ahash_request_cast(req_async); |
| 456 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 457 | |
| 458 | if (unlikely(err == -EINPROGRESS)) |
| 459 | goto out; |
| 460 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 461 | err = crypto_shash_final(&rctx->desc, req->result); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 462 | |
| 463 | req->base.complete = rctx->complete; |
| 464 | |
| 465 | out: |
| 466 | local_bh_disable(); |
| 467 | rctx->complete(&req->base, err); |
| 468 | local_bh_enable(); |
| 469 | } |
| 470 | |
| 471 | static int cryptd_hash_final_enqueue(struct ahash_request *req) |
| 472 | { |
| 473 | return cryptd_hash_enqueue(req, cryptd_hash_final); |
| 474 | } |
| 475 | |
| 476 | static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) |
| 477 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 478 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
| 479 | struct crypto_shash *child = ctx->child; |
| 480 | struct ahash_request *req = ahash_request_cast(req_async); |
| 481 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 482 | struct shash_desc *desc = &rctx->desc; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 483 | |
| 484 | if (unlikely(err == -EINPROGRESS)) |
| 485 | goto out; |
| 486 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 487 | desc->tfm = child; |
| 488 | desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 489 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 490 | err = shash_ahash_digest(req, desc); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 491 | |
| 492 | req->base.complete = rctx->complete; |
| 493 | |
| 494 | out: |
| 495 | local_bh_disable(); |
| 496 | rctx->complete(&req->base, err); |
| 497 | local_bh_enable(); |
| 498 | } |
| 499 | |
| 500 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) |
| 501 | { |
| 502 | return cryptd_hash_enqueue(req, cryptd_hash_digest); |
| 503 | } |
| 504 | |
| 505 | static struct crypto_instance *cryptd_alloc_hash( |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 506 | struct rtattr **tb, struct cryptd_queue *queue) |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 507 | { |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 508 | struct hashd_instance_ctx *ctx; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 509 | struct crypto_instance *inst; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 510 | struct shash_alg *salg; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 511 | struct crypto_alg *alg; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 512 | int err; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 513 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 514 | salg = shash_attr_alg(tb[1], 0, 0); |
| 515 | if (IS_ERR(salg)) |
| 516 | return ERR_CAST(salg); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 517 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 518 | alg = &salg->base; |
| 519 | inst = cryptd_alloc_instance(alg, sizeof(*ctx)); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 520 | if (IS_ERR(inst)) |
| 521 | goto out_put_alg; |
| 522 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 523 | ctx = crypto_instance_ctx(inst); |
| 524 | ctx->queue = queue; |
| 525 | |
| 526 | err = crypto_init_shash_spawn(&ctx->spawn, salg, inst); |
| 527 | if (err) |
| 528 | goto out_free_inst; |
| 529 | |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 530 | inst->alg.cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC; |
| 531 | inst->alg.cra_type = &crypto_ahash_type; |
| 532 | |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 533 | inst->alg.cra_ahash.digestsize = salg->digestsize; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 534 | inst->alg.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
| 535 | |
| 536 | inst->alg.cra_init = cryptd_hash_init_tfm; |
| 537 | inst->alg.cra_exit = cryptd_hash_exit_tfm; |
| 538 | |
| 539 | inst->alg.cra_ahash.init = cryptd_hash_init_enqueue; |
| 540 | inst->alg.cra_ahash.update = cryptd_hash_update_enqueue; |
| 541 | inst->alg.cra_ahash.final = cryptd_hash_final_enqueue; |
| 542 | inst->alg.cra_ahash.setkey = cryptd_hash_setkey; |
| 543 | inst->alg.cra_ahash.digest = cryptd_hash_digest_enqueue; |
| 544 | |
| 545 | out_put_alg: |
| 546 | crypto_mod_put(alg); |
| 547 | return inst; |
Herbert Xu | 46309d8 | 2009-07-12 21:38:59 +0800 | [diff] [blame] | 548 | |
| 549 | out_free_inst: |
| 550 | kfree(inst); |
| 551 | inst = ERR_PTR(err); |
| 552 | goto out_put_alg; |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 553 | } |
| 554 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 555 | static struct cryptd_queue queue; |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 556 | |
| 557 | static struct crypto_instance *cryptd_alloc(struct rtattr **tb) |
| 558 | { |
| 559 | struct crypto_attr_type *algt; |
| 560 | |
| 561 | algt = crypto_get_attr_type(tb); |
| 562 | if (IS_ERR(algt)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 563 | return ERR_CAST(algt); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 564 | |
| 565 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { |
| 566 | case CRYPTO_ALG_TYPE_BLKCIPHER: |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 567 | return cryptd_alloc_blkcipher(tb, &queue); |
Loc Ho | b8a2825 | 2008-05-14 21:23:00 +0800 | [diff] [blame] | 568 | case CRYPTO_ALG_TYPE_DIGEST: |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 569 | return cryptd_alloc_hash(tb, &queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | return ERR_PTR(-EINVAL); |
| 573 | } |
| 574 | |
| 575 | static void cryptd_free(struct crypto_instance *inst) |
| 576 | { |
| 577 | struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst); |
| 578 | |
| 579 | crypto_drop_spawn(&ctx->spawn); |
| 580 | kfree(inst); |
| 581 | } |
| 582 | |
| 583 | static struct crypto_template cryptd_tmpl = { |
| 584 | .name = "cryptd", |
| 585 | .alloc = cryptd_alloc, |
| 586 | .free = cryptd_free, |
| 587 | .module = THIS_MODULE, |
| 588 | }; |
| 589 | |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 590 | struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, |
| 591 | u32 type, u32 mask) |
| 592 | { |
| 593 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame] | 594 | struct crypto_tfm *tfm; |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 595 | |
| 596 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 597 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 598 | return ERR_PTR(-EINVAL); |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame] | 599 | type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
| 600 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
| 601 | mask &= ~CRYPTO_ALG_TYPE_MASK; |
| 602 | mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK); |
| 603 | tfm = crypto_alloc_base(cryptd_alg_name, type, mask); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 604 | if (IS_ERR(tfm)) |
| 605 | return ERR_CAST(tfm); |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame] | 606 | if (tfm->__crt_alg->cra_module != THIS_MODULE) { |
| 607 | crypto_free_tfm(tfm); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 608 | return ERR_PTR(-EINVAL); |
| 609 | } |
| 610 | |
Huang Ying | 505fd21 | 2009-03-29 15:33:53 +0800 | [diff] [blame] | 611 | return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm)); |
Huang Ying | 1cac2cb | 2009-01-18 16:19:46 +1100 | [diff] [blame] | 612 | } |
| 613 | EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher); |
| 614 | |
| 615 | struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm) |
| 616 | { |
| 617 | struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); |
| 618 | return ctx->child; |
| 619 | } |
| 620 | EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child); |
| 621 | |
| 622 | void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) |
| 623 | { |
| 624 | crypto_free_ablkcipher(&tfm->base); |
| 625 | } |
| 626 | EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); |
| 627 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 628 | static int __init cryptd_init(void) |
| 629 | { |
| 630 | int err; |
| 631 | |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 632 | err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 633 | if (err) |
| 634 | return err; |
| 635 | |
| 636 | err = crypto_register_template(&cryptd_tmpl); |
| 637 | if (err) |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 638 | cryptd_fini_queue(&queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 639 | |
| 640 | return err; |
| 641 | } |
| 642 | |
| 643 | static void __exit cryptd_exit(void) |
| 644 | { |
Huang Ying | 254eff7 | 2009-02-19 14:42:19 +0800 | [diff] [blame] | 645 | cryptd_fini_queue(&queue); |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 646 | crypto_unregister_template(&cryptd_tmpl); |
| 647 | } |
| 648 | |
| 649 | module_init(cryptd_init); |
| 650 | module_exit(cryptd_exit); |
| 651 | |
| 652 | MODULE_LICENSE("GPL"); |
| 653 | MODULE_DESCRIPTION("Software async crypto daemon"); |