/* * 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> struct module;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)(void *param, unsigned int len);	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;}; 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;}; extern const struct crypto_type crypto_blkcipher_type;extern const struct crypto_type crypto_hash_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);void crypto_drop_spawn(struct crypto_spawn *spawn);struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,				    u32 mask); struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,				       u32 type, u32 mask);struct crypto_instance *crypto_alloc_instance(const char *name,					      struct crypto_alg *alg); 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); 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 void *crypto_instance_ctx(struct crypto_instance *inst){	return inst->__ctx;} 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;} #endif	/* _CRYPTO_ALGAPI_H */