[linux-2.6-block.git] / include / crypto / hash.h

/*
 * Hash: Hash algorithms under the crypto API
 * 
 * Copyright (c) 2008 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_HASH_H
#define _CRYPTO_HASH_H

#include <linux/crypto.h>

struct crypto_ahash;

struct hash_alg_common {
	unsigned int digestsize;
	unsigned int statesize;

	struct crypto_alg base;
};

struct ahash_request {
	struct crypto_async_request base;

	unsigned int nbytes;
	struct scatterlist *src;
	u8 *result;

	/* This field may only be used by the ahash API code. */
	void *priv;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct ahash_alg {
	int (*init)(struct ahash_request *req);
	int (*update)(struct ahash_request *req);
	int (*final)(struct ahash_request *req);
	int (*finup)(struct ahash_request *req);
	int (*digest)(struct ahash_request *req);
	int (*export)(struct ahash_request *req, void *out);
	int (*import)(struct ahash_request *req, const void *in);
	int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
		      unsigned int keylen);

	struct hash_alg_common halg;
};

struct shash_desc {
	struct crypto_shash *tfm;
	u32 flags;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct shash_alg {
	int (*init)(struct shash_desc *desc);
	int (*update)(struct shash_desc *desc, const u8 *data,
		      unsigned int len);
	int (*final)(struct shash_desc *desc, u8 *out);
	int (*finup)(struct shash_desc *desc, const u8 *data,
		     unsigned int len, u8 *out);
	int (*digest)(struct shash_desc *desc, const u8 *data,
		      unsigned int len, u8 *out);
	int (*export)(struct shash_desc *desc, void *out);
	int (*import)(struct shash_desc *desc, const void *in);
	int (*setkey)(struct crypto_shash *tfm, const u8 *key,
		      unsigned int keylen);

	unsigned int descsize;

	/* These fields must match hash_alg_common. */
	unsigned int digestsize;
	unsigned int statesize;

	struct crypto_alg base;
};

struct crypto_ahash {
	int (*init)(struct ahash_request *req);
	int (*update)(struct ahash_request *req);
	int (*final)(struct ahash_request *req);
	int (*finup)(struct ahash_request *req);
	int (*digest)(struct ahash_request *req);
	int (*export)(struct ahash_request *req, void *out);
	int (*import)(struct ahash_request *req, const void *in);
	int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
		      unsigned int keylen);

	unsigned int reqsize;
	struct crypto_tfm base;
};

struct crypto_shash {
	unsigned int descsize;
	struct crypto_tfm base;
};

static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
{
	return container_of(tfm, struct crypto_ahash, base);
}

struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
					u32 mask);

static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
{
	return &tfm->base;
}

static inline void crypto_free_ahash(struct crypto_ahash *tfm)
{
	crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
}

static inline unsigned int crypto_ahash_alignmask(
	struct crypto_ahash *tfm)
{
	return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
}

static inline struct hash_alg_common *__crypto_hash_alg_common(
	struct crypto_alg *alg)
{
	return container_of(alg, struct hash_alg_common, base);
}

static inline struct hash_alg_common *crypto_hash_alg_common(
	struct crypto_ahash *tfm)
{
	return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
}

static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
{
	return crypto_hash_alg_common(tfm)->digestsize;
}

static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
{
	return crypto_hash_alg_common(tfm)->statesize;
}

static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
{
	return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
}

static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
{
	crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
}

static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
{
	crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
}

static inline struct crypto_ahash *crypto_ahash_reqtfm(
	struct ahash_request *req)
{
	return __crypto_ahash_cast(req->base.tfm);
}

static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
{
	return tfm->reqsize;
}

static inline void *ahash_request_ctx(struct ahash_request *req)
{
	return req->__ctx;
}

int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
			unsigned int keylen);
int crypto_ahash_finup(struct ahash_request *req);
int crypto_ahash_final(struct ahash_request *req);
int crypto_ahash_digest(struct ahash_request *req);

static inline int crypto_ahash_export(struct ahash_request *req, void *out)
{
	return crypto_ahash_reqtfm(req)->export(req, out);
}

static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
{
	return crypto_ahash_reqtfm(req)->import(req, in);
}

static inline int crypto_ahash_init(struct ahash_request *req)
{
	return crypto_ahash_reqtfm(req)->init(req);
}

static inline int crypto_ahash_update(struct ahash_request *req)
{
	return crypto_ahash_reqtfm(req)->update(req);
}

static inline void ahash_request_set_tfm(struct ahash_request *req,
					 struct crypto_ahash *tfm)
{
	req->base.tfm = crypto_ahash_tfm(tfm);
}

static inline struct ahash_request *ahash_request_alloc(
	struct crypto_ahash *tfm, gfp_t gfp)
{
	struct ahash_request *req;

	req = kmalloc(sizeof(struct ahash_request) +
		      crypto_ahash_reqsize(tfm), gfp);

	if (likely(req))
		ahash_request_set_tfm(req, tfm);

	return req;
}

static inline void ahash_request_free(struct ahash_request *req)
{
	kzfree(req);
}

static inline struct ahash_request *ahash_request_cast(
	struct crypto_async_request *req)
{
	return container_of(req, struct ahash_request, base);
}

static inline void ahash_request_set_callback(struct ahash_request *req,
					      u32 flags,
					      crypto_completion_t complete,
					      void *data)
{
	req->base.complete = complete;
	req->base.data = data;
	req->base.flags = flags;
}

static inline void ahash_request_set_crypt(struct ahash_request *req,
					   struct scatterlist *src, u8 *result,
					   unsigned int nbytes)
{
	req->src = src;
	req->nbytes = nbytes;
	req->result = result;
}

struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
					u32 mask);

static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
{
	return &tfm->base;
}

static inline void crypto_free_shash(struct crypto_shash *tfm)
{
	crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
}

static inline unsigned int crypto_shash_alignmask(
	struct crypto_shash *tfm)
{
	return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
}

static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
{
	return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
}

static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
{
	return container_of(alg, struct shash_alg, base);
}

static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
{
	return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
}

static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
{
	return crypto_shash_alg(tfm)->digestsize;
}

static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
{
	return crypto_shash_alg(tfm)->statesize;
}

static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
{
	return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
}

static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
{
	crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
}

static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
{
	crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
}

static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
{
	return tfm->descsize;
}

static inline void *shash_desc_ctx(struct shash_desc *desc)
{
	return desc->__ctx;
}

int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
			unsigned int keylen);
int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
			unsigned int len, u8 *out);

static inline int crypto_shash_export(struct shash_desc *desc, void *out)
{
	return crypto_shash_alg(desc->tfm)->export(desc, out);
}

static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
{
	return crypto_shash_alg(desc->tfm)->import(desc, in);
}

static inline int crypto_shash_init(struct shash_desc *desc)
{
	return crypto_shash_alg(desc->tfm)->init(desc);
}

int crypto_shash_update(struct shash_desc *desc, const u8 *data,
			unsigned int len);
int crypto_shash_final(struct shash_desc *desc, u8 *out);
int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
		       unsigned int len, u8 *out);

#endif	/* _CRYPTO_HASH_H */
Commit	Line	Data
18e33e6d HX	1	/*
	2	* Hash: Hash algorithms under the crypto API
	3	*
	4	* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	*/
	12
	13	#ifndef _CRYPTO_HASH_H
	14	#define _CRYPTO_HASH_H
	15
	16	#include <linux/crypto.h>
	17
88056ec3 HX	18	struct crypto_ahash;
	19
	20	struct hash_alg_common {
	21	unsigned int digestsize;
	22	unsigned int statesize;
	23
	24	struct crypto_alg base;
	25	};
	26
	27	struct ahash_request {
	28	struct crypto_async_request base;
	29
	30	unsigned int nbytes;
	31	struct scatterlist *src;
	32	u8 *result;
	33
66f6ce5e HX	34	/* This field may only be used by the ahash API code. */
	35	void *priv;
	36
88056ec3 HX	37	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	38	};
	39
	40	struct ahash_alg {
	41	int (init)(struct ahash_request req);
	42	int (update)(struct ahash_request req);
	43	int (final)(struct ahash_request req);
	44	int (finup)(struct ahash_request req);
	45	int (digest)(struct ahash_request req);
	46	int (export)(struct ahash_request req, void *out);
	47	int (import)(struct ahash_request req, const void *in);
	48	int (setkey)(struct crypto_ahash tfm, const u8 *key,
	49	unsigned int keylen);
	50
	51	struct hash_alg_common halg;
	52	};
	53
7b5a080b HX	54	struct shash_desc {
	55	struct crypto_shash *tfm;
	56	u32 flags;
	57
	58	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	59	};
	60
	61	struct shash_alg {
	62	int (init)(struct shash_desc desc);
	63	int (update)(struct shash_desc desc, const u8 *data,
	64	unsigned int len);
	65	int (final)(struct shash_desc desc, u8 *out);
	66	int (finup)(struct shash_desc desc, const u8 *data,
	67	unsigned int len, u8 *out);
	68	int (digest)(struct shash_desc desc, const u8 *data,
	69	unsigned int len, u8 *out);
99d27e1c HX	70	int (export)(struct shash_desc desc, void *out);
99d27e1c HX	71	int (import)(struct shash_desc desc, const void *in);
7b5a080b HX	72	int (setkey)(struct crypto_shash tfm, const u8 *key,
	73	unsigned int keylen);
	74
	75	unsigned int descsize;
88056ec3 HX	76
88056ec3 HX	77	/* These fields must match hash_alg_common. */
7b5a080b	78	unsigned int digestsize;
99d27e1c	79	unsigned int statesize;
7b5a080b HX	80
	81	struct crypto_alg base;
	82	};
	83
18e33e6d	84	struct crypto_ahash {
88056ec3 HX	85	int (init)(struct ahash_request req);
	86	int (update)(struct ahash_request req);
	87	int (final)(struct ahash_request req);
	88	int (finup)(struct ahash_request req);
	89	int (digest)(struct ahash_request req);
	90	int (export)(struct ahash_request req, void *out);
	91	int (import)(struct ahash_request req, const void *in);
	92	int (setkey)(struct crypto_ahash tfm, const u8 *key,
	93	unsigned int keylen);
	94
88056ec3	95	unsigned int reqsize;
18e33e6d HX	96	struct crypto_tfm base;
	97	};
	98
7b5a080b	99	struct crypto_shash {
113adefc	100	unsigned int descsize;
7b5a080b HX	101	struct crypto_tfm base;
	102	};
	103
18e33e6d HX	104	static inline struct crypto_ahash __crypto_ahash_cast(struct crypto_tfm tfm)
18e33e6d HX	105	{
88056ec3	106	return container_of(tfm, struct crypto_ahash, base);
18e33e6d HX	107	}
18e33e6d HX	108
88056ec3 HX	109	struct crypto_ahash crypto_alloc_ahash(const char alg_name, u32 type,
88056ec3 HX	110	u32 mask);
18e33e6d HX	111
	112	static inline struct crypto_tfm crypto_ahash_tfm(struct crypto_ahash tfm)
	113	{
	114	return &tfm->base;
	115	}
	116
	117	static inline void crypto_free_ahash(struct crypto_ahash *tfm)
	118	{
88056ec3	119	crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
18e33e6d HX	120	}
	121
	122	static inline unsigned int crypto_ahash_alignmask(
	123	struct crypto_ahash *tfm)
	124	{
	125	return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
	126	}
	127
88056ec3 HX	128	static inline struct hash_alg_common *__crypto_hash_alg_common(
	129	struct crypto_alg *alg)
	130	{
	131	return container_of(alg, struct hash_alg_common, base);
	132	}
	133
	134	static inline struct hash_alg_common *crypto_hash_alg_common(
	135	struct crypto_ahash *tfm)
18e33e6d	136	{
88056ec3	137	return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
18e33e6d HX	138	}
	139
	140	static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
	141	{
500b3e3c	142	return crypto_hash_alg_common(tfm)->digestsize;
88056ec3 HX	143	}
	144
	145	static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
	146	{
	147	return crypto_hash_alg_common(tfm)->statesize;
18e33e6d HX	148	}
	149
	150	static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
	151	{
	152	return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
	153	}
	154
	155	static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
	156	{
	157	crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
	158	}
	159
	160	static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
	161	{
	162	crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
	163	}
	164
	165	static inline struct crypto_ahash *crypto_ahash_reqtfm(
	166	struct ahash_request *req)
	167	{
	168	return __crypto_ahash_cast(req->base.tfm);
	169	}
	170
	171	static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
	172	{
88056ec3	173	return tfm->reqsize;
18e33e6d HX	174	}
18e33e6d HX	175
dec8b786 HX	176	static inline void ahash_request_ctx(struct ahash_request req)
	177	{
	178	return req->__ctx;
	179	}
	180
66f6ce5e HX	181	int crypto_ahash_setkey(struct crypto_ahash tfm, const u8 key,
	182	unsigned int keylen);
	183	int crypto_ahash_finup(struct ahash_request *req);
	184	int crypto_ahash_final(struct ahash_request *req);
	185	int crypto_ahash_digest(struct ahash_request *req);
18e33e6d	186
88056ec3	187	static inline int crypto_ahash_export(struct ahash_request req, void out)
dec8b786	188	{
88056ec3	189	return crypto_ahash_reqtfm(req)->export(req, out);
dec8b786 HX	190	}
dec8b786 HX	191
88056ec3 HX	192	static inline int crypto_ahash_import(struct ahash_request req, const void in)
	193	{
	194	return crypto_ahash_reqtfm(req)->import(req, in);
	195	}
dec8b786	196
318e5313 HX	197	static inline int crypto_ahash_init(struct ahash_request *req)
318e5313 HX	198	{
88056ec3	199	return crypto_ahash_reqtfm(req)->init(req);
318e5313 HX	200	}
	201
	202	static inline int crypto_ahash_update(struct ahash_request *req)
	203	{
88056ec3	204	return crypto_ahash_reqtfm(req)->update(req);
318e5313 HX	205	}
318e5313 HX	206
18e33e6d HX	207	static inline void ahash_request_set_tfm(struct ahash_request *req,
	208	struct crypto_ahash *tfm)
	209	{
	210	req->base.tfm = crypto_ahash_tfm(tfm);
	211	}
	212
	213	static inline struct ahash_request *ahash_request_alloc(
	214	struct crypto_ahash *tfm, gfp_t gfp)
	215	{
	216	struct ahash_request *req;
	217
	218	req = kmalloc(sizeof(struct ahash_request) +
	219	crypto_ahash_reqsize(tfm), gfp);
	220
	221	if (likely(req))
	222	ahash_request_set_tfm(req, tfm);
	223
	224	return req;
	225	}
	226
	227	static inline void ahash_request_free(struct ahash_request *req)
	228	{
aef73cfc	229	kzfree(req);
18e33e6d HX	230	}
	231
	232	static inline struct ahash_request *ahash_request_cast(
	233	struct crypto_async_request *req)
	234	{
	235	return container_of(req, struct ahash_request, base);
	236	}
	237
	238	static inline void ahash_request_set_callback(struct ahash_request *req,
	239	u32 flags,
	240	crypto_completion_t complete,
	241	void *data)
	242	{
	243	req->base.complete = complete;
	244	req->base.data = data;
	245	req->base.flags = flags;
	246	}
	247
	248	static inline void ahash_request_set_crypt(struct ahash_request *req,
	249	struct scatterlist src, u8 result,
	250	unsigned int nbytes)
	251	{
	252	req->src = src;
	253	req->nbytes = nbytes;
	254	req->result = result;
	255	}
	256
7b5a080b HX	257	struct crypto_shash crypto_alloc_shash(const char alg_name, u32 type,
	258	u32 mask);
	259
	260	static inline struct crypto_tfm crypto_shash_tfm(struct crypto_shash tfm)
	261	{
	262	return &tfm->base;
	263	}
	264
	265	static inline void crypto_free_shash(struct crypto_shash *tfm)
	266	{
412e87ae	267	crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
7b5a080b HX	268	}
	269
	270	static inline unsigned int crypto_shash_alignmask(
	271	struct crypto_shash *tfm)
	272	{
	273	return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
	274	}
	275
97495986 HX	276	static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
	277	{
	278	return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
	279	}
	280
7b5a080b HX	281	static inline struct shash_alg __crypto_shash_alg(struct crypto_alg alg)
	282	{
	283	return container_of(alg, struct shash_alg, base);
	284	}
	285
	286	static inline struct shash_alg crypto_shash_alg(struct crypto_shash tfm)
	287	{
	288	return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
	289	}
	290
	291	static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
	292	{
	293	return crypto_shash_alg(tfm)->digestsize;
	294	}
	295
99d27e1c HX	296	static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
	297	{
	298	return crypto_shash_alg(tfm)->statesize;
	299	}
	300
7b5a080b HX	301	static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
	302	{
	303	return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
	304	}
	305
	306	static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
	307	{
	308	crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
	309	}
	310
	311	static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
	312	{
	313	crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
	314	}
	315
	316	static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
	317	{
113adefc	318	return tfm->descsize;
7b5a080b HX	319	}
	320
	321	static inline void shash_desc_ctx(struct shash_desc desc)
	322	{
	323	return desc->__ctx;
	324	}
	325
	326	int crypto_shash_setkey(struct crypto_shash tfm, const u8 key,
	327	unsigned int keylen);
	328	int crypto_shash_digest(struct shash_desc desc, const u8 data,
	329	unsigned int len, u8 *out);
	330
99d27e1c	331	static inline int crypto_shash_export(struct shash_desc desc, void out)
dec8b786	332	{
99d27e1c	333	return crypto_shash_alg(desc->tfm)->export(desc, out);
dec8b786 HX	334	}
dec8b786 HX	335
99d27e1c HX	336	static inline int crypto_shash_import(struct shash_desc desc, const void in)
	337	{
	338	return crypto_shash_alg(desc->tfm)->import(desc, in);
	339	}
dec8b786	340
7b5a080b HX	341	static inline int crypto_shash_init(struct shash_desc *desc)
	342	{
	343	return crypto_shash_alg(desc->tfm)->init(desc);
	344	}
	345
	346	int crypto_shash_update(struct shash_desc desc, const u8 data,
	347	unsigned int len);
	348	int crypto_shash_final(struct shash_desc desc, u8 out);
	349	int crypto_shash_finup(struct shash_desc desc, const u8 data,
	350	unsigned int len, u8 *out);
	351
18e33e6d	352	#endif /* _CRYPTO_HASH_H */