[net-next-2.6.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>
#include <asm/kmap_types.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;

extern enum km_type crypto_km_types[];

static inline enum km_type crypto_kmap_type(int out)
{
	return crypto_km_types[(in_softirq() ? 2 : 0) + out];
}

static inline void *crypto_kmap(struct page *page, int out)
{
	return kmap_atomic(page, crypto_kmap_type(out));
}

static inline void crypto_kunmap(void *vaddr, int out)
{
	kunmap_atomic(vaddr, crypto_kmap_type(out));
}

static inline void crypto_yield(u32 flags)
{
	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
		cond_resched();
}

#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,
						 int flags)
{
	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,
						 int flags)
{
	unsigned int len = alg->cra_ctxsize;
	
	switch (flags & CRYPTO_TFM_MODE_MASK) {
	case CRYPTO_TFM_MODE_CBC:
		len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
		len += alg->cra_blocksize;
		break;
	}

	return len;
}

static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
						   int flags)
{
	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_flags(struct crypto_tfm *tfm, u32 flags);
int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);

int crypto_init_digest_ops(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_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 flags);

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
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
	4	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b	5	* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
1da177e4 LT	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
cce9e06d HX	15
cce9e06d HX	16	#include <crypto/algapi.h>
2825982d	17	#include <linux/completion.h>
1da177e4 LT	18	#include <linux/mm.h>
	19	#include <linux/highmem.h>
	20	#include <linux/interrupt.h>
	21	#include <linux/init.h>
5cb1454b	22	#include <linux/list.h>
4cc7720c	23	#include <linux/module.h>
fbdae9f3	24	#include <linux/kernel.h>
2825982d	25	#include <linux/notifier.h>
5cb1454b	26	#include <linux/rwsem.h>
64baf3cf	27	#include <linux/slab.h>
1da177e4 LT	28	#include <asm/kmap_types.h>
1da177e4 LT	29
2825982d HX	30	/* Crypto notification events. */
	31	enum {
	32	CRYPTO_MSG_ALG_REQUEST,
	33	CRYPTO_MSG_ALG_REGISTER,
	34	CRYPTO_MSG_ALG_UNREGISTER,
	35	CRYPTO_MSG_TMPL_REGISTER,
	36	CRYPTO_MSG_TMPL_UNREGISTER,
	37	};
	38
4cc7720c HX	39	struct crypto_instance;
	40	struct crypto_template;
	41
2825982d HX	42	struct crypto_larval {
	43	struct crypto_alg alg;
	44	struct crypto_alg *adult;
	45	struct completion completion;
492e2b63	46	u32 mask;
2825982d HX	47	};
2825982d HX	48
5cb1454b HX	49	extern struct list_head crypto_alg_list;
5cb1454b HX	50	extern struct rw_semaphore crypto_alg_sem;
2825982d	51	extern struct blocking_notifier_head crypto_chain;
5cb1454b	52
1da177e4 LT	53	extern enum km_type crypto_km_types[];
	54
	55	static inline enum km_type crypto_kmap_type(int out)
	56	{
	57	return crypto_km_types[(in_softirq() ? 2 : 0) + out];
	58	}
	59
	60	static inline void crypto_kmap(struct page page, int out)
	61	{
	62	return kmap_atomic(page, crypto_kmap_type(out));
	63	}
	64
	65	static inline void crypto_kunmap(void *vaddr, int out)
	66	{
	67	kunmap_atomic(vaddr, crypto_kmap_type(out));
	68	}
	69
8f21cf0d	70	static inline void crypto_yield(u32 flags)
1da177e4	71	{
8f21cf0d	72	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
1da177e4 LT	73	cond_resched();
	74	}
	75
1da177e4 LT	76	#ifdef CONFIG_PROC_FS
1da177e4 LT	77	void __init crypto_init_proc(void);
cce9e06d	78	void __exit crypto_exit_proc(void);
1da177e4 LT	79	#else
	80	static inline void crypto_init_proc(void)
	81	{ }
cce9e06d HX	82	static inline void crypto_exit_proc(void)
cce9e06d HX	83	{ }
1da177e4 LT	84	#endif
1da177e4 LT	85
fbdae9f3 HX	86	static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
	87	int flags)
	88	{
ee756416 HX	89	unsigned int len = alg->cra_ctxsize;
	90
	91	if (alg->cra_alignmask) {
	92	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
	93	len += alg->cra_digest.dia_digestsize;
	94	}
	95
	96	return len;
fbdae9f3 HX	97	}
	98
	99	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
	100	int flags)
	101	{
	102	unsigned int len = alg->cra_ctxsize;
	103
	104	switch (flags & CRYPTO_TFM_MODE_MASK) {
	105	case CRYPTO_TFM_MODE_CBC:
9d853c37	106	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
fbdae9f3 HX	107	len += alg->cra_blocksize;
	108	break;
	109	}
	110
	111	return len;
	112	}
	113
	114	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
	115	int flags)
	116	{
	117	return alg->cra_ctxsize;
	118	}
	119
2825982d	120	struct crypto_alg crypto_mod_get(struct crypto_alg alg);
492e2b63 HX	121	struct crypto_alg __crypto_alg_lookup(const char name, u32 type, u32 mask);
492e2b63 HX	122	struct crypto_alg crypto_alg_mod_lookup(const char name, u32 type, u32 mask);
2825982d	123
1da177e4 LT	124	int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
	125	int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
	126	int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
	127
	128	int crypto_init_digest_ops(struct crypto_tfm *tfm);
	129	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	130	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	131
	132	void crypto_exit_digest_ops(struct crypto_tfm *tfm);
	133	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	134	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	135
492e2b63	136	void crypto_larval_error(const char *name, u32 type, u32 mask);
2825982d	137
6bfd4809 HX	138	void crypto_shoot_alg(struct crypto_alg *alg);
	139	struct crypto_tfm __crypto_alloc_tfm(struct crypto_alg alg, u32 flags);
	140
4cc7720c HX	141	int crypto_register_instance(struct crypto_template *tmpl,
	142	struct crypto_instance *inst);
	143
2825982d HX	144	int crypto_register_notifier(struct notifier_block *nb);
	145	int crypto_unregister_notifier(struct notifier_block *nb);
	146
6bfd4809 HX	147	static inline void crypto_alg_put(struct crypto_alg *alg)
	148	{
	149	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
	150	alg->cra_destroy(alg);
	151	}
	152
4cc7720c HX	153	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	154	{
	155	return try_module_get(tmpl->module);
	156	}
	157
	158	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	159	{
	160	module_put(tmpl->module);
	161	}
	162
2825982d HX	163	static inline int crypto_is_larval(struct crypto_alg *alg)
	164	{
	165	return alg->cra_flags & CRYPTO_ALG_LARVAL;
	166	}
	167
6bfd4809 HX	168	static inline int crypto_is_dead(struct crypto_alg *alg)
	169	{
	170	return alg->cra_flags & CRYPTO_ALG_DEAD;
	171	}
	172
	173	static inline int crypto_is_moribund(struct crypto_alg *alg)
	174	{
	175	return alg->cra_flags & (CRYPTO_ALG_DEAD \| CRYPTO_ALG_DYING);
	176	}
	177
2825982d HX	178	static inline int crypto_notify(unsigned long val, void *v)
	179	{
	180	return blocking_notifier_call_chain(&crypto_chain, val, v);
	181	}
	182
1da177e4 LT	183	#endif /* _CRYPTO_INTERNAL_H */
1da177e4 LT	184