[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(struct crypto_tfm *tfm)
{
	if (tfm->crt_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)
{
	return alg->cra_ctxsize;
}

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);
void crypto_mod_put(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);

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 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_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
	70	static inline void crypto_yield(struct crypto_tfm *tfm)
	71	{
64baf3cf	72	if (tfm->crt_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	{
	102	return alg->cra_ctxsize;
	103	}
	104
	105	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
	106	int flags)
	107	{
	108	unsigned int len = alg->cra_ctxsize;
	109
	110	switch (flags & CRYPTO_TFM_MODE_MASK) {
	111	case CRYPTO_TFM_MODE_CBC:
9d853c37	112	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
fbdae9f3 HX	113	len += alg->cra_blocksize;
	114	break;
	115	}
	116
	117	return len;
	118	}
	119
	120	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
	121	int flags)
	122	{
	123	return alg->cra_ctxsize;
	124	}
	125
2825982d HX	126	struct crypto_alg crypto_mod_get(struct crypto_alg alg);
2825982d HX	127	void crypto_mod_put(struct crypto_alg *alg);
492e2b63 HX	128	struct crypto_alg __crypto_alg_lookup(const char name, u32 type, u32 mask);
492e2b63 HX	129	struct crypto_alg crypto_alg_mod_lookup(const char name, u32 type, u32 mask);
2825982d	130
1da177e4 LT	131	int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
	132	int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
	133	int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
	134
	135	int crypto_init_digest_ops(struct crypto_tfm *tfm);
	136	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	137	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	138
	139	void crypto_exit_digest_ops(struct crypto_tfm *tfm);
	140	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	141	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	142
492e2b63	143	void crypto_larval_error(const char *name, u32 type, u32 mask);
2825982d	144
4cc7720c HX	145	int crypto_register_instance(struct crypto_template *tmpl,
	146	struct crypto_instance *inst);
	147
2825982d HX	148	int crypto_register_notifier(struct notifier_block *nb);
	149	int crypto_unregister_notifier(struct notifier_block *nb);
	150
4cc7720c HX	151	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	152	{
	153	return try_module_get(tmpl->module);
	154	}
	155
	156	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	157	{
	158	module_put(tmpl->module);
	159	}
	160
2825982d HX	161	static inline int crypto_is_larval(struct crypto_alg *alg)
	162	{
	163	return alg->cra_flags & CRYPTO_ALG_LARVAL;
	164	}
	165
	166	static inline int crypto_notify(unsigned long val, void *v)
	167	{
	168	return blocking_notifier_call_chain(&crypto_chain, val, v);
	169	}
	170
1da177e4 LT	171	#endif /* _CRYPTO_INTERNAL_H */
1da177e4 LT	172