diff options
Diffstat (limited to 'include/crypto/algapi.h')
| -rw-r--r-- | include/crypto/algapi.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h new file mode 100644 index 000000000000..5748aecdb414 --- /dev/null +++ b/include/crypto/algapi.h | |||
| @@ -0,0 +1,156 @@ | |||
| 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> | ||
| 16 | |||
| 17 | struct module; | ||
| 18 | struct seq_file; | ||
| 19 | |||
| 20 | struct crypto_type { | ||
| 21 | unsigned int (*ctxsize)(struct crypto_alg *alg); | ||
| 22 | int (*init)(struct crypto_tfm *tfm); | ||
| 23 | void (*exit)(struct crypto_tfm *tfm); | ||
| 24 | void (*show)(struct seq_file *m, struct crypto_alg *alg); | ||
| 25 | }; | ||
| 26 | |||
| 27 | struct crypto_instance { | ||
| 28 | struct crypto_alg alg; | ||
| 29 | |||
| 30 | struct crypto_template *tmpl; | ||
| 31 | struct hlist_node list; | ||
| 32 | |||
| 33 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | ||
| 34 | }; | ||
| 35 | |||
| 36 | struct crypto_template { | ||
| 37 | struct list_head list; | ||
| 38 | struct hlist_head instances; | ||
| 39 | struct module *module; | ||
| 40 | |||
| 41 | struct crypto_instance *(*alloc)(void *param, unsigned int len); | ||
| 42 | void (*free)(struct crypto_instance *inst); | ||
| 43 | |||
| 44 | char name[CRYPTO_MAX_ALG_NAME]; | ||
| 45 | }; | ||
| 46 | |||
| 47 | struct crypto_spawn { | ||
| 48 | struct list_head list; | ||
| 49 | struct crypto_alg *alg; | ||
| 50 | struct crypto_instance *inst; | ||
| 51 | }; | ||
| 52 | |||
| 53 | struct scatter_walk { | ||
| 54 | struct scatterlist *sg; | ||
| 55 | unsigned int offset; | ||
| 56 | }; | ||
| 57 | |||
| 58 | struct blkcipher_walk { | ||
| 59 | union { | ||
| 60 | struct { | ||
| 61 | struct page *page; | ||
| 62 | unsigned long offset; | ||
| 63 | } phys; | ||
| 64 | |||
| 65 | struct { | ||
| 66 | u8 *page; | ||
| 67 | u8 *addr; | ||
| 68 | } virt; | ||
| 69 | } src, dst; | ||
| 70 | |||
| 71 | struct scatter_walk in; | ||
| 72 | unsigned int nbytes; | ||
| 73 | |||
| 74 | struct scatter_walk out; | ||
| 75 | unsigned int total; | ||
| 76 | |||
| 77 | void *page; | ||
| 78 | u8 *buffer; | ||
| 79 | u8 *iv; | ||
| 80 | |||
| 81 | int flags; | ||
| 82 | }; | ||
| 83 | |||
| 84 | extern const struct crypto_type crypto_blkcipher_type; | ||
| 85 | extern const struct crypto_type crypto_hash_type; | ||
| 86 | |||
| 87 | void crypto_mod_put(struct crypto_alg *alg); | ||
| 88 | |||
| 89 | int crypto_register_template(struct crypto_template *tmpl); | ||
| 90 | void crypto_unregister_template(struct crypto_template *tmpl); | ||
| 91 | struct crypto_template *crypto_lookup_template(const char *name); | ||
| 92 | |||
| 93 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, | ||
| 94 | struct crypto_instance *inst); | ||
| 95 | void crypto_drop_spawn(struct crypto_spawn *spawn); | ||
| 96 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn); | ||
| 97 | |||
| 98 | struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len, | ||
| 99 | u32 type, u32 mask); | ||
| 100 | struct crypto_instance *crypto_alloc_instance(const char *name, | ||
| 101 | struct crypto_alg *alg); | ||
| 102 | |||
| 103 | int blkcipher_walk_done(struct blkcipher_desc *desc, | ||
| 104 | struct blkcipher_walk *walk, int err); | ||
| 105 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | ||
| 106 | struct blkcipher_walk *walk); | ||
| 107 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | ||
| 108 | struct blkcipher_walk *walk); | ||
| 109 | |||
| 110 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) | ||
| 111 | { | ||
| 112 | unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm); | ||
| 113 | unsigned long align = crypto_tfm_alg_alignmask(tfm); | ||
| 114 | |||
| 115 | if (align <= crypto_tfm_ctx_alignment()) | ||
| 116 | align = 1; | ||
| 117 | return (void *)ALIGN(addr, align); | ||
| 118 | } | ||
| 119 | |||
| 120 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) | ||
| 121 | { | ||
| 122 | return inst->__ctx; | ||
| 123 | } | ||
| 124 | |||
| 125 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) | ||
| 126 | { | ||
| 127 | return crypto_tfm_ctx(&tfm->base); | ||
| 128 | } | ||
| 129 | |||
| 130 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | ||
| 131 | { | ||
| 132 | return crypto_tfm_ctx_aligned(&tfm->base); | ||
| 133 | } | ||
| 134 | |||
| 135 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) | ||
| 136 | { | ||
| 137 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | ||
| 138 | } | ||
| 139 | |||
| 140 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) | ||
| 141 | { | ||
| 142 | return crypto_tfm_ctx_aligned(&tfm->base); | ||
| 143 | } | ||
| 144 | |||
| 145 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, | ||
| 146 | struct scatterlist *dst, | ||
| 147 | struct scatterlist *src, | ||
| 148 | unsigned int nbytes) | ||
| 149 | { | ||
| 150 | walk->in.sg = src; | ||
| 151 | walk->out.sg = dst; | ||
| 152 | walk->total = nbytes; | ||
| 153 | } | ||
| 154 | |||
| 155 | #endif /* _CRYPTO_ALGAPI_H */ | ||
| 156 | |||