[linux-2.6-block.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/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/rwsem.h>
#include <linux/slab.h>
#include <asm/kmap_types.h>

struct crypto_instance;
struct crypto_template;

extern struct list_head crypto_alg_list;
extern struct rw_semaphore crypto_alg_sem;

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;
}

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);

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

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);
}

#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>
1da177e4 LT	17	#include <linux/mm.h>
	18	#include <linux/highmem.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/init.h>
5cb1454b	21	#include <linux/list.h>
4cc7720c	22	#include <linux/module.h>
fbdae9f3	23	#include <linux/kernel.h>
5cb1454b	24	#include <linux/rwsem.h>
64baf3cf	25	#include <linux/slab.h>
1da177e4 LT	26	#include <asm/kmap_types.h>
1da177e4 LT	27
4cc7720c HX	28	struct crypto_instance;
	29	struct crypto_template;
	30
5cb1454b HX	31	extern struct list_head crypto_alg_list;
	32	extern struct rw_semaphore crypto_alg_sem;
	33
1da177e4 LT	34	extern enum km_type crypto_km_types[];
	35
	36	static inline enum km_type crypto_kmap_type(int out)
	37	{
	38	return crypto_km_types[(in_softirq() ? 2 : 0) + out];
	39	}
	40
	41	static inline void crypto_kmap(struct page page, int out)
	42	{
	43	return kmap_atomic(page, crypto_kmap_type(out));
	44	}
	45
	46	static inline void crypto_kunmap(void *vaddr, int out)
	47	{
	48	kunmap_atomic(vaddr, crypto_kmap_type(out));
	49	}
	50
	51	static inline void crypto_yield(struct crypto_tfm *tfm)
	52	{
64baf3cf	53	if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
1da177e4 LT	54	cond_resched();
	55	}
	56
1da177e4 LT	57	#ifdef CONFIG_CRYPTO_HMAC
	58	int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
	59	void crypto_free_hmac_block(struct crypto_tfm *tfm);
	60	#else
	61	static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
	62	{
	63	return 0;
	64	}
	65
	66	static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
	67	{ }
	68	#endif
	69
	70	#ifdef CONFIG_PROC_FS
	71	void __init crypto_init_proc(void);
cce9e06d	72	void __exit crypto_exit_proc(void);
1da177e4 LT	73	#else
	74	static inline void crypto_init_proc(void)
	75	{ }
cce9e06d HX	76	static inline void crypto_exit_proc(void)
cce9e06d HX	77	{ }
1da177e4 LT	78	#endif
1da177e4 LT	79
fbdae9f3 HX	80	static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
	81	int flags)
	82	{
	83	return alg->cra_ctxsize;
	84	}
	85
	86	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
	87	int flags)
	88	{
	89	unsigned int len = alg->cra_ctxsize;
	90
	91	switch (flags & CRYPTO_TFM_MODE_MASK) {
	92	case CRYPTO_TFM_MODE_CBC:
9d853c37	93	len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
fbdae9f3 HX	94	len += alg->cra_blocksize;
	95	break;
	96	}
	97
	98	return len;
	99	}
	100
	101	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
	102	int flags)
	103	{
	104	return alg->cra_ctxsize;
	105	}
	106
1da177e4 LT	107	int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
	108	int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
	109	int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
	110
	111	int crypto_init_digest_ops(struct crypto_tfm *tfm);
	112	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	113	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	114
	115	void crypto_exit_digest_ops(struct crypto_tfm *tfm);
	116	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	117	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	118
4cc7720c HX	119	int crypto_register_instance(struct crypto_template *tmpl,
	120	struct crypto_instance *inst);
	121
	122	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	123	{
	124	return try_module_get(tmpl->module);
	125	}
	126
	127	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	128	{
	129	module_put(tmpl->module);
	130	}
	131
1da177e4 LT	132	#endif /* _CRYPTO_INTERNAL_H */
1da177e4 LT	133