Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Hash: Hash algorithms under the crypto API |
| 3 | * |
| 4 | * Copyright (c) 2008 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 | #ifndef _CRYPTO_HASH_H |
| 14 | #define _CRYPTO_HASH_H |
| 15 | |
| 16 | #include <linux/crypto.h> |
| 17 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame^] | 18 | struct shash_desc { |
| 19 | struct crypto_shash *tfm; |
| 20 | u32 flags; |
| 21 | |
| 22 | void *__ctx[] CRYPTO_MINALIGN_ATTR; |
| 23 | }; |
| 24 | |
| 25 | struct shash_alg { |
| 26 | int (*init)(struct shash_desc *desc); |
| 27 | int (*update)(struct shash_desc *desc, const u8 *data, |
| 28 | unsigned int len); |
| 29 | int (*final)(struct shash_desc *desc, u8 *out); |
| 30 | int (*finup)(struct shash_desc *desc, const u8 *data, |
| 31 | unsigned int len, u8 *out); |
| 32 | int (*digest)(struct shash_desc *desc, const u8 *data, |
| 33 | unsigned int len, u8 *out); |
| 34 | int (*setkey)(struct crypto_shash *tfm, const u8 *key, |
| 35 | unsigned int keylen); |
| 36 | |
| 37 | unsigned int descsize; |
| 38 | unsigned int digestsize; |
| 39 | |
| 40 | struct crypto_alg base; |
| 41 | }; |
| 42 | |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 43 | struct crypto_ahash { |
| 44 | struct crypto_tfm base; |
| 45 | }; |
| 46 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame^] | 47 | struct crypto_shash { |
| 48 | struct crypto_tfm base; |
| 49 | }; |
| 50 | |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 51 | static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm) |
| 52 | { |
| 53 | return (struct crypto_ahash *)tfm; |
| 54 | } |
| 55 | |
| 56 | static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, |
| 57 | u32 type, u32 mask) |
| 58 | { |
| 59 | type &= ~CRYPTO_ALG_TYPE_MASK; |
| 60 | mask &= ~CRYPTO_ALG_TYPE_MASK; |
| 61 | type |= CRYPTO_ALG_TYPE_AHASH; |
| 62 | mask |= CRYPTO_ALG_TYPE_AHASH_MASK; |
| 63 | |
| 64 | return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask)); |
| 65 | } |
| 66 | |
| 67 | static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm) |
| 68 | { |
| 69 | return &tfm->base; |
| 70 | } |
| 71 | |
| 72 | static inline void crypto_free_ahash(struct crypto_ahash *tfm) |
| 73 | { |
| 74 | crypto_free_tfm(crypto_ahash_tfm(tfm)); |
| 75 | } |
| 76 | |
| 77 | static inline unsigned int crypto_ahash_alignmask( |
| 78 | struct crypto_ahash *tfm) |
| 79 | { |
| 80 | return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm)); |
| 81 | } |
| 82 | |
| 83 | static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm) |
| 84 | { |
| 85 | return &crypto_ahash_tfm(tfm)->crt_ahash; |
| 86 | } |
| 87 | |
| 88 | static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm) |
| 89 | { |
| 90 | return crypto_ahash_crt(tfm)->digestsize; |
| 91 | } |
| 92 | |
| 93 | static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm) |
| 94 | { |
| 95 | return crypto_tfm_get_flags(crypto_ahash_tfm(tfm)); |
| 96 | } |
| 97 | |
| 98 | static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags) |
| 99 | { |
| 100 | crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags); |
| 101 | } |
| 102 | |
| 103 | static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags) |
| 104 | { |
| 105 | crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags); |
| 106 | } |
| 107 | |
| 108 | static inline struct crypto_ahash *crypto_ahash_reqtfm( |
| 109 | struct ahash_request *req) |
| 110 | { |
| 111 | return __crypto_ahash_cast(req->base.tfm); |
| 112 | } |
| 113 | |
| 114 | static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm) |
| 115 | { |
| 116 | return crypto_ahash_crt(tfm)->reqsize; |
| 117 | } |
| 118 | |
| 119 | static inline int crypto_ahash_setkey(struct crypto_ahash *tfm, |
| 120 | const u8 *key, unsigned int keylen) |
| 121 | { |
| 122 | struct ahash_tfm *crt = crypto_ahash_crt(tfm); |
| 123 | |
| 124 | return crt->setkey(tfm, key, keylen); |
| 125 | } |
| 126 | |
| 127 | static inline int crypto_ahash_digest(struct ahash_request *req) |
| 128 | { |
| 129 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); |
| 130 | return crt->digest(req); |
| 131 | } |
| 132 | |
Herbert Xu | 318e531 | 2008-08-05 13:34:30 +0800 | [diff] [blame] | 133 | static inline int crypto_ahash_init(struct ahash_request *req) |
| 134 | { |
| 135 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); |
| 136 | return crt->init(req); |
| 137 | } |
| 138 | |
| 139 | static inline int crypto_ahash_update(struct ahash_request *req) |
| 140 | { |
| 141 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); |
| 142 | return crt->update(req); |
| 143 | } |
| 144 | |
| 145 | static inline int crypto_ahash_final(struct ahash_request *req) |
| 146 | { |
| 147 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); |
| 148 | return crt->final(req); |
| 149 | } |
| 150 | |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 151 | static inline void ahash_request_set_tfm(struct ahash_request *req, |
| 152 | struct crypto_ahash *tfm) |
| 153 | { |
| 154 | req->base.tfm = crypto_ahash_tfm(tfm); |
| 155 | } |
| 156 | |
| 157 | static inline struct ahash_request *ahash_request_alloc( |
| 158 | struct crypto_ahash *tfm, gfp_t gfp) |
| 159 | { |
| 160 | struct ahash_request *req; |
| 161 | |
| 162 | req = kmalloc(sizeof(struct ahash_request) + |
| 163 | crypto_ahash_reqsize(tfm), gfp); |
| 164 | |
| 165 | if (likely(req)) |
| 166 | ahash_request_set_tfm(req, tfm); |
| 167 | |
| 168 | return req; |
| 169 | } |
| 170 | |
| 171 | static inline void ahash_request_free(struct ahash_request *req) |
| 172 | { |
| 173 | kfree(req); |
| 174 | } |
| 175 | |
| 176 | static inline struct ahash_request *ahash_request_cast( |
| 177 | struct crypto_async_request *req) |
| 178 | { |
| 179 | return container_of(req, struct ahash_request, base); |
| 180 | } |
| 181 | |
| 182 | static inline void ahash_request_set_callback(struct ahash_request *req, |
| 183 | u32 flags, |
| 184 | crypto_completion_t complete, |
| 185 | void *data) |
| 186 | { |
| 187 | req->base.complete = complete; |
| 188 | req->base.data = data; |
| 189 | req->base.flags = flags; |
| 190 | } |
| 191 | |
| 192 | static inline void ahash_request_set_crypt(struct ahash_request *req, |
| 193 | struct scatterlist *src, u8 *result, |
| 194 | unsigned int nbytes) |
| 195 | { |
| 196 | req->src = src; |
| 197 | req->nbytes = nbytes; |
| 198 | req->result = result; |
| 199 | } |
| 200 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame^] | 201 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
| 202 | u32 mask); |
| 203 | |
| 204 | static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm) |
| 205 | { |
| 206 | return &tfm->base; |
| 207 | } |
| 208 | |
| 209 | static inline void crypto_free_shash(struct crypto_shash *tfm) |
| 210 | { |
| 211 | crypto_free_tfm(crypto_shash_tfm(tfm)); |
| 212 | } |
| 213 | |
| 214 | static inline unsigned int crypto_shash_alignmask( |
| 215 | struct crypto_shash *tfm) |
| 216 | { |
| 217 | return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm)); |
| 218 | } |
| 219 | |
| 220 | static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg) |
| 221 | { |
| 222 | return container_of(alg, struct shash_alg, base); |
| 223 | } |
| 224 | |
| 225 | static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm) |
| 226 | { |
| 227 | return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg); |
| 228 | } |
| 229 | |
| 230 | static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm) |
| 231 | { |
| 232 | return crypto_shash_alg(tfm)->digestsize; |
| 233 | } |
| 234 | |
| 235 | static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm) |
| 236 | { |
| 237 | return crypto_tfm_get_flags(crypto_shash_tfm(tfm)); |
| 238 | } |
| 239 | |
| 240 | static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags) |
| 241 | { |
| 242 | crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags); |
| 243 | } |
| 244 | |
| 245 | static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags) |
| 246 | { |
| 247 | crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags); |
| 248 | } |
| 249 | |
| 250 | static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm) |
| 251 | { |
| 252 | return crypto_shash_alg(tfm)->descsize; |
| 253 | } |
| 254 | |
| 255 | static inline void *shash_desc_ctx(struct shash_desc *desc) |
| 256 | { |
| 257 | return desc->__ctx; |
| 258 | } |
| 259 | |
| 260 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
| 261 | unsigned int keylen); |
| 262 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
| 263 | unsigned int len, u8 *out); |
| 264 | |
| 265 | static inline int crypto_shash_init(struct shash_desc *desc) |
| 266 | { |
| 267 | return crypto_shash_alg(desc->tfm)->init(desc); |
| 268 | } |
| 269 | |
| 270 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
| 271 | unsigned int len); |
| 272 | int crypto_shash_final(struct shash_desc *desc, u8 *out); |
| 273 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
| 274 | unsigned int len, u8 *out); |
| 275 | |
Herbert Xu | 18e33e6 | 2008-07-10 16:01:22 +0800 | [diff] [blame] | 276 | #endif /* _CRYPTO_HASH_H */ |