[deliverable/linux.git] / crypto / internal.h

/*
 * Cryptographic API.
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 * Copyright (c) 2005 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_INTERNAL_H
#define _CRYPTO_INTERNAL_H

#include <crypto/algapi.h>
#include <linux/completion.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/rwsem.h>
#include <linux/slab.h>

/* Crypto notification events. */
enum {
	CRYPTO_MSG_ALG_REQUEST,
	CRYPTO_MSG_ALG_REGISTER,
	CRYPTO_MSG_ALG_UNREGISTER,
	CRYPTO_MSG_TMPL_REGISTER,
	CRYPTO_MSG_TMPL_UNREGISTER,
};

struct crypto_instance;
struct crypto_template;

struct crypto_larval {
	struct crypto_alg alg;
	struct crypto_alg *adult;
	struct completion completion;
	u32 mask;
};

extern struct list_head crypto_alg_list;
extern struct rw_semaphore crypto_alg_sem;
extern struct blocking_notifier_head crypto_chain;

#ifdef CONFIG_PROC_FS
void __init crypto_init_proc(void);
void __exit crypto_exit_proc(void);
#else
static inline void crypto_init_proc(void)
{ }
static inline void crypto_exit_proc(void)
{ }
#endif

static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
{
	unsigned int len = alg->cra_ctxsize;

	if (alg->cra_alignmask) {
		len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
		len += alg->cra_digest.dia_digestsize;
	}

	return len;
}

static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
{
	return alg->cra_ctxsize;
}

static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
{
	return alg->cra_ctxsize;
}

struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);

int crypto_init_digest_ops(struct crypto_tfm *tfm);
int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
int crypto_init_cipher_ops(struct crypto_tfm *tfm);
int crypto_init_compress_ops(struct crypto_tfm *tfm);

void crypto_exit_digest_ops(struct crypto_tfm *tfm);
void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
void crypto_exit_compress_ops(struct crypto_tfm *tfm);

void crypto_larval_kill(struct crypto_alg *alg);
struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
void crypto_larval_error(const char *name, u32 type, u32 mask);

void crypto_shoot_alg(struct crypto_alg *alg);
struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
				      u32 mask);

int crypto_register_instance(struct crypto_template *tmpl,
			     struct crypto_instance *inst);

int crypto_register_notifier(struct notifier_block *nb);
int crypto_unregister_notifier(struct notifier_block *nb);

static inline void crypto_alg_put(struct crypto_alg *alg)
{
	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
		alg->cra_destroy(alg);
}

static inline int crypto_tmpl_get(struct crypto_template *tmpl)
{
	return try_module_get(tmpl->module);
}

static inline void crypto_tmpl_put(struct crypto_template *tmpl)
{
	module_put(tmpl->module);
}

static inline int crypto_is_larval(struct crypto_alg *alg)
{
	return alg->cra_flags & CRYPTO_ALG_LARVAL;
}

static inline int crypto_is_dead(struct crypto_alg *alg)
{
	return alg->cra_flags & CRYPTO_ALG_DEAD;
}

static inline int crypto_is_moribund(struct crypto_alg *alg)
{
	return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
}

static inline int crypto_notify(unsigned long val, void *v)
{
	return blocking_notifier_call_chain(&crypto_chain, val, v);
}

#endif	/* _CRYPTO_INTERNAL_H */
Commit	Line	Data
	1	/*
	2	* Cryptographic API.
	3	*
	4	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
	5	* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the Free
	9	* Software Foundation; either version 2 of the License, or (at your option)
	10	* any later version.
	11	*
	12	*/
	13	#ifndef _CRYPTO_INTERNAL_H
	14	#define _CRYPTO_INTERNAL_H
	15
	16	#include <crypto/algapi.h>
	17	#include <linux/completion.h>
	18	#include <linux/mm.h>
	19	#include <linux/highmem.h>
	20	#include <linux/interrupt.h>
	21	#include <linux/init.h>
	22	#include <linux/list.h>
	23	#include <linux/module.h>
	24	#include <linux/kernel.h>
	25	#include <linux/notifier.h>
	26	#include <linux/rwsem.h>
	27	#include <linux/slab.h>
	28
	29	/* Crypto notification events. */
	30	enum {
	31	CRYPTO_MSG_ALG_REQUEST,
	32	CRYPTO_MSG_ALG_REGISTER,
	33	CRYPTO_MSG_ALG_UNREGISTER,
	34	CRYPTO_MSG_TMPL_REGISTER,
	35	CRYPTO_MSG_TMPL_UNREGISTER,
	36	};
	37
	38	struct crypto_instance;
	39	struct crypto_template;
	40
	41	struct crypto_larval {
	42	struct crypto_alg alg;
	43	struct crypto_alg *adult;
	44	struct completion completion;
	45	u32 mask;
	46	};
	47
	48	extern struct list_head crypto_alg_list;
	49	extern struct rw_semaphore crypto_alg_sem;
	50	extern struct blocking_notifier_head crypto_chain;
	51
	52	#ifdef CONFIG_PROC_FS
	53	void __init crypto_init_proc(void);
	54	void __exit crypto_exit_proc(void);
	55	#else
	56	static inline void crypto_init_proc(void)
	57	{ }
	58	static inline void crypto_exit_proc(void)
	59	{ }
	60	#endif
	61
	62	static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
	63	{
	64	unsigned int len = alg->cra_ctxsize;
	65
	66	if (alg->cra_alignmask) {
	67	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
	68	len += alg->cra_digest.dia_digestsize;
	69	}
	70
	71	return len;
	72	}
	73
	74	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
	75	{
	76	return alg->cra_ctxsize;
	77	}
	78
	79	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
	80	{
	81	return alg->cra_ctxsize;
	82	}
	83
	84	struct crypto_alg crypto_mod_get(struct crypto_alg alg);
	85	struct crypto_alg __crypto_alg_lookup(const char name, u32 type, u32 mask);
	86	struct crypto_alg crypto_alg_mod_lookup(const char name, u32 type, u32 mask);
	87
	88	int crypto_init_digest_ops(struct crypto_tfm *tfm);
	89	int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
	90	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	91	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	92
	93	void crypto_exit_digest_ops(struct crypto_tfm *tfm);
	94	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	95	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	96
	97	void crypto_larval_kill(struct crypto_alg *alg);
	98	struct crypto_alg crypto_larval_lookup(const char name, u32 type, u32 mask);
	99	void crypto_larval_error(const char *name, u32 type, u32 mask);
	100
	101	void crypto_shoot_alg(struct crypto_alg *alg);
	102	struct crypto_tfm __crypto_alloc_tfm(struct crypto_alg alg, u32 type,
	103	u32 mask);
	104
	105	int crypto_register_instance(struct crypto_template *tmpl,
	106	struct crypto_instance *inst);
	107
	108	int crypto_register_notifier(struct notifier_block *nb);
	109	int crypto_unregister_notifier(struct notifier_block *nb);
	110
	111	static inline void crypto_alg_put(struct crypto_alg *alg)
	112	{
	113	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
	114	alg->cra_destroy(alg);
	115	}
	116
	117	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	118	{
	119	return try_module_get(tmpl->module);
	120	}
	121
	122	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	123	{
	124	module_put(tmpl->module);
	125	}
	126
	127	static inline int crypto_is_larval(struct crypto_alg *alg)
	128	{
	129	return alg->cra_flags & CRYPTO_ALG_LARVAL;
	130	}
	131
	132	static inline int crypto_is_dead(struct crypto_alg *alg)
	133	{
	134	return alg->cra_flags & CRYPTO_ALG_DEAD;
	135	}
	136
	137	static inline int crypto_is_moribund(struct crypto_alg *alg)
	138	{
	139	return alg->cra_flags & (CRYPTO_ALG_DEAD \| CRYPTO_ALG_DYING);
	140	}
	141
	142	static inline int crypto_notify(unsigned long val, void *v)
	143	{
	144	return blocking_notifier_call_chain(&crypto_chain, val, v);
	145	}
	146
	147	#endif /* _CRYPTO_INTERNAL_H */
	148