| /* |
| * Cryptographic API for algorithms (i.e., low-level API). |
| * |
| * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| */ |
| #ifndef _CRYPTO_ALGAPI_H |
| #define _CRYPTO_ALGAPI_H |
| |
| #include <linux/crypto.h> |
| #include <linux/list.h> |
| #include <linux/kernel.h> |
| |
| struct module; |
| struct rtattr; |
| struct seq_file; |
| |
| struct crypto_type { |
| unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
| int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
| void (*exit)(struct crypto_tfm *tfm); |
| void (*show)(struct seq_file *m, struct crypto_alg *alg); |
| }; |
| |
| struct crypto_instance { |
| struct crypto_alg alg; |
| |
| struct crypto_template *tmpl; |
| struct hlist_node list; |
| |
| void *__ctx[] CRYPTO_MINALIGN_ATTR; |
| }; |
| |
| struct crypto_template { |
| struct list_head list; |
| struct hlist_head instances; |
| struct module *module; |
| |
| struct crypto_instance *(*alloc)(struct rtattr **tb); |
| void (*free)(struct crypto_instance *inst); |
| |
| char name[CRYPTO_MAX_ALG_NAME]; |
| }; |
| |
| struct crypto_spawn { |
| struct list_head list; |
| struct crypto_alg *alg; |
| struct crypto_instance *inst; |
| u32 mask; |
| }; |
| |
| struct crypto_queue { |
| struct list_head list; |
| struct list_head *backlog; |
| |
| unsigned int qlen; |
| unsigned int max_qlen; |
| }; |
| |
| struct scatter_walk { |
| struct scatterlist *sg; |
| unsigned int offset; |
| }; |
| |
| struct blkcipher_walk { |
| union { |
| struct { |
| struct page *page; |
| unsigned long offset; |
| } phys; |
| |
| struct { |
| u8 *page; |
| u8 *addr; |
| } virt; |
| } src, dst; |
| |
| struct scatter_walk in; |
| unsigned int nbytes; |
| |
| struct scatter_walk out; |
| unsigned int total; |
| |
| void *page; |
| u8 *buffer; |
| u8 *iv; |
| |
| int flags; |
| unsigned int blocksize; |
| }; |
| |
| extern const struct crypto_type crypto_ablkcipher_type; |
| extern const struct crypto_type crypto_aead_type; |
| extern const struct crypto_type crypto_blkcipher_type; |
| extern const struct crypto_type crypto_hash_type; |
| extern const struct crypto_type crypto_ahash_type; |
| |
| void crypto_mod_put(struct crypto_alg *alg); |
| |
| int crypto_register_template(struct crypto_template *tmpl); |
| void crypto_unregister_template(struct crypto_template *tmpl); |
| struct crypto_template *crypto_lookup_template(const char *name); |
| |
| int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
| struct crypto_instance *inst, u32 mask); |
| void crypto_drop_spawn(struct crypto_spawn *spawn); |
| struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
| u32 mask); |
| |
| static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
| struct crypto_instance *inst) |
| { |
| spawn->inst = inst; |
| } |
| |
| struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
| int crypto_check_attr_type(struct rtattr **tb, u32 type); |
| const char *crypto_attr_alg_name(struct rtattr *rta); |
| struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask); |
| int crypto_attr_u32(struct rtattr *rta, u32 *num); |
| struct crypto_instance *crypto_alloc_instance(const char *name, |
| struct crypto_alg *alg); |
| |
| void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
| int crypto_enqueue_request(struct crypto_queue *queue, |
| struct crypto_async_request *request); |
| struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
| int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); |
| |
| /* These functions require the input/output to be aligned as u32. */ |
| void crypto_inc(u8 *a, unsigned int size); |
| void crypto_xor(u8 *dst, const u8 *src, unsigned int size); |
| |
| int blkcipher_walk_done(struct blkcipher_desc *desc, |
| struct blkcipher_walk *walk, int err); |
| int blkcipher_walk_virt(struct blkcipher_desc *desc, |
| struct blkcipher_walk *walk); |
| int blkcipher_walk_phys(struct blkcipher_desc *desc, |
| struct blkcipher_walk *walk); |
| int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
| struct blkcipher_walk *walk, |
| unsigned int blocksize); |
| |
| static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
| { |
| unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm); |
| unsigned long align = crypto_tfm_alg_alignmask(tfm); |
| |
| if (align <= crypto_tfm_ctx_alignment()) |
| align = 1; |
| return (void *)ALIGN(addr, align); |
| } |
| |
| static inline struct crypto_instance *crypto_tfm_alg_instance( |
| struct crypto_tfm *tfm) |
| { |
| return container_of(tfm->__crt_alg, struct crypto_instance, alg); |
| } |
| |
| static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
| { |
| return inst->__ctx; |
| } |
| |
| static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
| struct crypto_ablkcipher *tfm) |
| { |
| return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; |
| } |
| |
| static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) |
| { |
| return crypto_tfm_ctx(&tfm->base); |
| } |
| |
| static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
| { |
| return crypto_tfm_ctx_aligned(&tfm->base); |
| } |
| |
| static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm) |
| { |
| return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead; |
| } |
| |
| static inline void *crypto_aead_ctx(struct crypto_aead *tfm) |
| { |
| return crypto_tfm_ctx(&tfm->base); |
| } |
| |
| static inline struct crypto_instance *crypto_aead_alg_instance( |
| struct crypto_aead *aead) |
| { |
| return crypto_tfm_alg_instance(&aead->base); |
| } |
| |
| static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
| struct crypto_spawn *spawn) |
| { |
| u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; |
| u32 mask = CRYPTO_ALG_TYPE_MASK; |
| |
| return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
| } |
| |
| static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
| { |
| return crypto_tfm_ctx(&tfm->base); |
| } |
| |
| static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) |
| { |
| return crypto_tfm_ctx_aligned(&tfm->base); |
| } |
| |
| static inline struct crypto_cipher *crypto_spawn_cipher( |
| struct crypto_spawn *spawn) |
| { |
| u32 type = CRYPTO_ALG_TYPE_CIPHER; |
| u32 mask = CRYPTO_ALG_TYPE_MASK; |
| |
| return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
| } |
| |
| static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
| { |
| return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; |
| } |
| |
| static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
| { |
| u32 type = CRYPTO_ALG_TYPE_HASH; |
| u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; |
| |
| return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); |
| } |
| |
| static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
| { |
| return crypto_tfm_ctx_aligned(&tfm->base); |
| } |
| |
| static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
| struct scatterlist *dst, |
| struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| walk->in.sg = src; |
| walk->out.sg = dst; |
| walk->total = nbytes; |
| } |
| |
| static inline struct crypto_async_request *crypto_get_backlog( |
| struct crypto_queue *queue) |
| { |
| return queue->backlog == &queue->list ? NULL : |
| container_of(queue->backlog, struct crypto_async_request, list); |
| } |
| |
| static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
| struct ablkcipher_request *request) |
| { |
| return crypto_enqueue_request(queue, &request->base); |
| } |
| |
| static inline struct ablkcipher_request *ablkcipher_dequeue_request( |
| struct crypto_queue *queue) |
| { |
| return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
| } |
| |
| static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) |
| { |
| return req->__ctx; |
| } |
| |
| static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
| struct crypto_ablkcipher *tfm) |
| { |
| return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
| } |
| |
| static inline void *aead_request_ctx(struct aead_request *req) |
| { |
| return req->__ctx; |
| } |
| |
| static inline void aead_request_complete(struct aead_request *req, int err) |
| { |
| req->base.complete(&req->base, err); |
| } |
| |
| static inline u32 aead_request_flags(struct aead_request *req) |
| { |
| return req->base.flags; |
| } |
| |
| static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, |
| u32 type, u32 mask) |
| { |
| return crypto_attr_alg(tb[1], type, mask); |
| } |
| |
| /* |
| * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. |
| * Otherwise returns zero. |
| */ |
| static inline int crypto_requires_sync(u32 type, u32 mask) |
| { |
| return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; |
| } |
| |
| static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) |
| { |
| return crypto_tfm_ctx(&tfm->base); |
| } |
| |
| static inline struct ahash_alg *crypto_ahash_alg( |
| struct crypto_ahash *tfm) |
| { |
| return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash; |
| } |
| |
| static inline int ahash_enqueue_request(struct crypto_queue *queue, |
| struct ahash_request *request) |
| { |
| return crypto_enqueue_request(queue, &request->base); |
| } |
| |
| static inline struct ahash_request *ahash_dequeue_request( |
| struct crypto_queue *queue) |
| { |
| return ahash_request_cast(crypto_dequeue_request(queue)); |
| } |
| |
| static inline void *ahash_request_ctx(struct ahash_request *req) |
| { |
| return req->__ctx; |
| } |
| |
| static inline int ahash_tfm_in_queue(struct crypto_queue *queue, |
| struct crypto_ahash *tfm) |
| { |
| return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); |
| } |
| |
| |
| #endif /* _CRYPTO_ALGAPI_H */ |
| |