[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>
#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_CRYPTO_HMAC
int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
void crypto_free_hmac_block(struct crypto_tfm *tfm);
#else
static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
{
	return 0;
}

static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
{ }
#endif

#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_CRYPTO_HMAC
	77	int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
	78	void crypto_free_hmac_block(struct crypto_tfm *tfm);
	79	#else
	80	static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
	81	{
	82	return 0;
	83	}
	84
	85	static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
	86	{ }
	87	#endif
	88
	89	#ifdef CONFIG_PROC_FS
	90	void __init crypto_init_proc(void);
cce9e06d	91	void __exit crypto_exit_proc(void);
1da177e4 LT	92	#else
	93	static inline void crypto_init_proc(void)
	94	{ }
cce9e06d HX	95	static inline void crypto_exit_proc(void)
cce9e06d HX	96	{ }
1da177e4 LT	97	#endif
1da177e4 LT	98
fbdae9f3 HX	99	static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
	100	int flags)
	101	{
ee756416 HX	102	unsigned int len = alg->cra_ctxsize;
	103
	104	if (alg->cra_alignmask) {
	105	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
	106	len += alg->cra_digest.dia_digestsize;
	107	}
	108
	109	return len;
fbdae9f3 HX	110	}
	111
	112	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
	113	int flags)
	114	{
	115	unsigned int len = alg->cra_ctxsize;
	116
	117	switch (flags & CRYPTO_TFM_MODE_MASK) {
	118	case CRYPTO_TFM_MODE_CBC:
9d853c37	119	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
fbdae9f3 HX	120	len += alg->cra_blocksize;
	121	break;
	122	}
	123
	124	return len;
	125	}
	126
	127	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
	128	int flags)
	129	{
	130	return alg->cra_ctxsize;
	131	}
	132
2825982d	133	struct crypto_alg crypto_mod_get(struct crypto_alg alg);
492e2b63 HX	134	struct crypto_alg __crypto_alg_lookup(const char name, u32 type, u32 mask);
492e2b63 HX	135	struct crypto_alg crypto_alg_mod_lookup(const char name, u32 type, u32 mask);
2825982d	136
1da177e4 LT	137	int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
	138	int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
	139	int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
	140
	141	int crypto_init_digest_ops(struct crypto_tfm *tfm);
	142	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	143	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	144
	145	void crypto_exit_digest_ops(struct crypto_tfm *tfm);
	146	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	147	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	148
492e2b63	149	void crypto_larval_error(const char *name, u32 type, u32 mask);
2825982d	150
6bfd4809 HX	151	void crypto_shoot_alg(struct crypto_alg *alg);
	152	struct crypto_tfm __crypto_alloc_tfm(struct crypto_alg alg, u32 flags);
	153
4cc7720c HX	154	int crypto_register_instance(struct crypto_template *tmpl,
	155	struct crypto_instance *inst);
	156
2825982d HX	157	int crypto_register_notifier(struct notifier_block *nb);
	158	int crypto_unregister_notifier(struct notifier_block *nb);
	159
6bfd4809 HX	160	static inline void crypto_alg_put(struct crypto_alg *alg)
	161	{
	162	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
	163	alg->cra_destroy(alg);
	164	}
	165
4cc7720c HX	166	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	167	{
	168	return try_module_get(tmpl->module);
	169	}
	170
	171	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	172	{
	173	module_put(tmpl->module);
	174	}
	175
2825982d HX	176	static inline int crypto_is_larval(struct crypto_alg *alg)
	177	{
	178	return alg->cra_flags & CRYPTO_ALG_LARVAL;
	179	}
	180
6bfd4809 HX	181	static inline int crypto_is_dead(struct crypto_alg *alg)
	182	{
	183	return alg->cra_flags & CRYPTO_ALG_DEAD;
	184	}
	185
	186	static inline int crypto_is_moribund(struct crypto_alg *alg)
	187	{
	188	return alg->cra_flags & (CRYPTO_ALG_DEAD \| CRYPTO_ALG_DYING);
	189	}
	190
2825982d HX	191	static inline int crypto_notify(unsigned long val, void *v)
	192	{
	193	return blocking_notifier_call_chain(&crypto_chain, val, v);
	194	}
	195
1da177e4 LT	196	#endif /* _CRYPTO_INTERNAL_H */
1da177e4 LT	197