Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API for algorithms (i.e., low-level API). |
| 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 | #ifndef _CRYPTO_ALGAPI_H |
| 13 | #define _CRYPTO_ALGAPI_H |
| 14 | |
| 15 | #include <linux/crypto.h> |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 16 | #include <linux/list.h> |
| 17 | #include <linux/kernel.h> |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 18 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 19 | struct module; |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 20 | struct rtattr; |
Herbert Xu | e853c3c | 2006-08-22 00:06:54 +1000 | [diff] [blame] | 21 | struct seq_file; |
| 22 | |
| 23 | struct crypto_type { |
Herbert Xu | 27d2a33 | 2007-01-24 20:50:26 +1100 | [diff] [blame] | 24 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
| 25 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
Herbert Xu | e853c3c | 2006-08-22 00:06:54 +1000 | [diff] [blame] | 26 | void (*exit)(struct crypto_tfm *tfm); |
| 27 | void (*show)(struct seq_file *m, struct crypto_alg *alg); |
| 28 | }; |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 29 | |
| 30 | struct crypto_instance { |
| 31 | struct crypto_alg alg; |
| 32 | |
| 33 | struct crypto_template *tmpl; |
| 34 | struct hlist_node list; |
| 35 | |
| 36 | void *__ctx[] CRYPTO_MINALIGN_ATTR; |
| 37 | }; |
| 38 | |
| 39 | struct crypto_template { |
| 40 | struct list_head list; |
| 41 | struct hlist_head instances; |
| 42 | struct module *module; |
| 43 | |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 44 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 45 | void (*free)(struct crypto_instance *inst); |
| 46 | |
| 47 | char name[CRYPTO_MAX_ALG_NAME]; |
| 48 | }; |
| 49 | |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 50 | struct crypto_spawn { |
| 51 | struct list_head list; |
| 52 | struct crypto_alg *alg; |
| 53 | struct crypto_instance *inst; |
Herbert Xu | a73e699 | 2007-04-08 21:31:36 +1000 | [diff] [blame] | 54 | u32 mask; |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 55 | }; |
| 56 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 57 | struct crypto_queue { |
| 58 | struct list_head list; |
| 59 | struct list_head *backlog; |
| 60 | |
| 61 | unsigned int qlen; |
| 62 | unsigned int max_qlen; |
| 63 | }; |
| 64 | |
Herbert Xu | 5c64097 | 2006-08-12 21:56:17 +1000 | [diff] [blame] | 65 | struct scatter_walk { |
| 66 | struct scatterlist *sg; |
| 67 | unsigned int offset; |
| 68 | }; |
| 69 | |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 70 | struct blkcipher_walk { |
| 71 | union { |
| 72 | struct { |
| 73 | struct page *page; |
| 74 | unsigned long offset; |
| 75 | } phys; |
| 76 | |
| 77 | struct { |
| 78 | u8 *page; |
| 79 | u8 *addr; |
| 80 | } virt; |
| 81 | } src, dst; |
| 82 | |
| 83 | struct scatter_walk in; |
| 84 | unsigned int nbytes; |
| 85 | |
| 86 | struct scatter_walk out; |
| 87 | unsigned int total; |
| 88 | |
| 89 | void *page; |
| 90 | u8 *buffer; |
| 91 | u8 *iv; |
| 92 | |
| 93 | int flags; |
| 94 | }; |
| 95 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 96 | extern const struct crypto_type crypto_ablkcipher_type; |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 97 | extern const struct crypto_type crypto_aead_type; |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 98 | extern const struct crypto_type crypto_blkcipher_type; |
Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 99 | extern const struct crypto_type crypto_hash_type; |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 100 | |
Herbert Xu | db131ef | 2006-09-21 11:44:08 +1000 | [diff] [blame] | 101 | void crypto_mod_put(struct crypto_alg *alg); |
| 102 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 103 | int crypto_register_template(struct crypto_template *tmpl); |
| 104 | void crypto_unregister_template(struct crypto_template *tmpl); |
| 105 | struct crypto_template *crypto_lookup_template(const char *name); |
| 106 | |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 107 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
Herbert Xu | a73e699 | 2007-04-08 21:31:36 +1000 | [diff] [blame] | 108 | struct crypto_instance *inst, u32 mask); |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 109 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
Herbert Xu | 2e306ee | 2006-12-17 10:05:58 +1100 | [diff] [blame] | 110 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
| 111 | u32 mask); |
Herbert Xu | 6bfd480 | 2006-09-21 11:39:29 +1000 | [diff] [blame] | 112 | |
Herbert Xu | ebc610e | 2007-01-01 18:37:02 +1100 | [diff] [blame] | 113 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
| 114 | int crypto_check_attr_type(struct rtattr **tb, u32 type); |
| 115 | struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask); |
Herbert Xu | 7fed0bf | 2006-08-06 23:10:45 +1000 | [diff] [blame] | 116 | struct crypto_instance *crypto_alloc_instance(const char *name, |
| 117 | struct crypto_alg *alg); |
| 118 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 119 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
| 120 | int crypto_enqueue_request(struct crypto_queue *queue, |
| 121 | struct crypto_async_request *request); |
| 122 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
| 123 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); |
| 124 | |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 125 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
| 126 | struct blkcipher_walk *walk, int err); |
| 127 | int blkcipher_walk_virt(struct blkcipher_desc *desc, |
| 128 | struct blkcipher_walk *walk); |
| 129 | int blkcipher_walk_phys(struct blkcipher_desc *desc, |
| 130 | struct blkcipher_walk *walk); |
| 131 | |
| 132 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
| 133 | { |
| 134 | unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm); |
| 135 | unsigned long align = crypto_tfm_alg_alignmask(tfm); |
| 136 | |
| 137 | if (align <= crypto_tfm_ctx_alignment()) |
| 138 | align = 1; |
| 139 | return (void *)ALIGN(addr, align); |
| 140 | } |
| 141 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 142 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
| 143 | struct crypto_tfm *tfm) |
| 144 | { |
| 145 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); |
| 146 | } |
| 147 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 148 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
| 149 | { |
| 150 | return inst->__ctx; |
| 151 | } |
| 152 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 153 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
| 154 | struct crypto_ablkcipher *tfm) |
| 155 | { |
| 156 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; |
| 157 | } |
| 158 | |
| 159 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) |
| 160 | { |
| 161 | return crypto_tfm_ctx(&tfm->base); |
| 162 | } |
| 163 | |
Sebastian Siewior | aa379a6 | 2007-08-02 20:41:53 +0800 | [diff] [blame] | 164 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
| 165 | { |
| 166 | return crypto_tfm_ctx_aligned(&tfm->base); |
| 167 | } |
| 168 | |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 169 | static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm) |
| 170 | { |
| 171 | return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead; |
| 172 | } |
| 173 | |
Herbert Xu | 124b53d | 2007-04-16 20:49:20 +1000 | [diff] [blame] | 174 | static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
| 175 | struct crypto_spawn *spawn) |
| 176 | { |
| 177 | u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; |
| 178 | u32 mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC; |
| 179 | |
| 180 | return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
| 181 | } |
| 182 | |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 183 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
| 184 | { |
| 185 | return crypto_tfm_ctx(&tfm->base); |
| 186 | } |
| 187 | |
| 188 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) |
| 189 | { |
| 190 | return crypto_tfm_ctx_aligned(&tfm->base); |
| 191 | } |
| 192 | |
Herbert Xu | 2e306ee | 2006-12-17 10:05:58 +1100 | [diff] [blame] | 193 | static inline struct crypto_cipher *crypto_spawn_cipher( |
| 194 | struct crypto_spawn *spawn) |
| 195 | { |
| 196 | u32 type = CRYPTO_ALG_TYPE_CIPHER; |
| 197 | u32 mask = CRYPTO_ALG_TYPE_MASK; |
| 198 | |
| 199 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
| 200 | } |
| 201 | |
Herbert Xu | f28776a | 2006-08-13 20:58:18 +1000 | [diff] [blame] | 202 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
| 203 | { |
| 204 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; |
| 205 | } |
| 206 | |
Herbert Xu | 2e306ee | 2006-12-17 10:05:58 +1100 | [diff] [blame] | 207 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
| 208 | { |
| 209 | u32 type = CRYPTO_ALG_TYPE_HASH; |
| 210 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; |
| 211 | |
| 212 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); |
| 213 | } |
| 214 | |
Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 215 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
| 216 | { |
| 217 | return crypto_tfm_ctx_aligned(&tfm->base); |
| 218 | } |
| 219 | |
Herbert Xu | 5cde0af | 2006-08-22 00:07:53 +1000 | [diff] [blame] | 220 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
| 221 | struct scatterlist *dst, |
| 222 | struct scatterlist *src, |
| 223 | unsigned int nbytes) |
| 224 | { |
| 225 | walk->in.sg = src; |
| 226 | walk->out.sg = dst; |
| 227 | walk->total = nbytes; |
| 228 | } |
| 229 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 230 | static inline struct crypto_async_request *crypto_get_backlog( |
| 231 | struct crypto_queue *queue) |
| 232 | { |
| 233 | return queue->backlog == &queue->list ? NULL : |
| 234 | container_of(queue->backlog, struct crypto_async_request, list); |
| 235 | } |
| 236 | |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 237 | static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 238 | struct ablkcipher_request *request) |
| 239 | { |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 240 | return crypto_enqueue_request(queue, &request->base); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 244 | struct crypto_queue *queue) |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 245 | { |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 246 | return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) |
| 250 | { |
| 251 | return req->__ctx; |
| 252 | } |
| 253 | |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 254 | static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
| 255 | struct crypto_ablkcipher *tfm) |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 256 | { |
Herbert Xu | 2de98e7 | 2007-08-26 19:12:47 +0800 | [diff] [blame^] | 257 | return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 258 | } |
| 259 | |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 260 | #endif /* _CRYPTO_ALGAPI_H */ |
| 261 | |