[net-next-2.6.git] / include / crypto / algapi.h

/*
 * 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 */
Commit	Line	Data
cce9e06d HX	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
4cc7720c	17	struct module;
e853c3cf HX	18	struct seq_file;
	19
	20	struct crypto_type {
27d2a330 HX	21	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
27d2a330 HX	22	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
e853c3cf HX	23	void (exit)(struct crypto_tfm tfm);
	24	void (show)(struct seq_file m, struct crypto_alg *alg);
	25	};
4cc7720c HX	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
6bfd4809 HX	47	struct crypto_spawn {
	48	struct list_head list;
	49	struct crypto_alg *alg;
	50	struct crypto_instance *inst;
	51	};
	52
5c64097a HX	53	struct scatter_walk {
	54	struct scatterlist *sg;
	55	unsigned int offset;
	56	};
	57
5cde0af2 HX	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;
055bcee3	85	extern const struct crypto_type crypto_hash_type;
5cde0af2	86
db131ef9 HX	87	void crypto_mod_put(struct crypto_alg *alg);
db131ef9 HX	88
4cc7720c HX	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
6bfd4809 HX	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);
2e306ee0 HX	96	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
2e306ee0 HX	97	u32 mask);
6bfd4809	98
7fed0bf2 HX	99	struct crypto_alg crypto_get_attr_alg(void param, unsigned int len,
	100	u32 type, u32 mask);
	101	struct crypto_instance crypto_alloc_instance(const char name,
	102	struct crypto_alg *alg);
	103
5cde0af2 HX	104	int blkcipher_walk_done(struct blkcipher_desc *desc,
	105	struct blkcipher_walk *walk, int err);
	106	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	107	struct blkcipher_walk *walk);
	108	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	109	struct blkcipher_walk *walk);
	110
	111	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
	112	{
	113	unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
	114	unsigned long align = crypto_tfm_alg_alignmask(tfm);
	115
	116	if (align <= crypto_tfm_ctx_alignment())
	117	align = 1;
	118	return (void *)ALIGN(addr, align);
	119	}
	120
4cc7720c HX	121	static inline void crypto_instance_ctx(struct crypto_instance inst)
	122	{
	123	return inst->__ctx;
	124	}
	125
5cde0af2 HX	126	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	127	{
	128	return crypto_tfm_ctx(&tfm->base);
	129	}
	130
	131	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	132	{
	133	return crypto_tfm_ctx_aligned(&tfm->base);
	134	}
	135
2e306ee0 HX	136	static inline struct crypto_cipher *crypto_spawn_cipher(
	137	struct crypto_spawn *spawn)
	138	{
	139	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	140	u32 mask = CRYPTO_ALG_TYPE_MASK;
	141
	142	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	143	}
	144
f28776a3 HX	145	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	146	{
	147	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	148	}
	149
2e306ee0 HX	150	static inline struct crypto_hash crypto_spawn_hash(struct crypto_spawn spawn)
	151	{
	152	u32 type = CRYPTO_ALG_TYPE_HASH;
	153	u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
	154
	155	return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
	156	}
	157
055bcee3 HX	158	static inline void crypto_hash_ctx_aligned(struct crypto_hash tfm)
	159	{
	160	return crypto_tfm_ctx_aligned(&tfm->base);
	161	}
	162
5cde0af2 HX	163	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	164	struct scatterlist *dst,
	165	struct scatterlist *src,
	166	unsigned int nbytes)
	167	{
	168	walk->in.sg = src;
	169	walk->out.sg = dst;
	170	walk->total = nbytes;
	171	}
	172
cce9e06d HX	173	#endif /* _CRYPTO_ALGAPI_H */
cce9e06d HX	174