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

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Hash algorithms.
 * 
 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
 */

#ifndef _CRYPTO_INTERNAL_HASH_H
#define _CRYPTO_INTERNAL_HASH_H

#include <crypto/algapi.h>
#include <crypto/hash.h>

/* Set this bit to handle partial blocks in the API. */
#define CRYPTO_AHASH_ALG_BLOCK_ONLY	0x01000000

/* Set this bit if final requires at least one byte. */
#define CRYPTO_AHASH_ALG_FINAL_NONZERO	0x02000000

/* Set this bit if finup can deal with multiple blocks. */
#define CRYPTO_AHASH_ALG_FINUP_MAX	0x04000000

/* This bit is set by the Crypto API if export_core is not supported. */
#define CRYPTO_AHASH_ALG_NO_EXPORT_CORE	0x08000000

#define HASH_FBREQ_ON_STACK(name, req) \
        char __##name##_req[sizeof(struct ahash_request) + \
                            MAX_SYNC_HASH_REQSIZE] CRYPTO_MINALIGN_ATTR; \
        struct ahash_request *name = ahash_fbreq_on_stack_init( \
                __##name##_req, (req))

struct ahash_request;

struct ahash_instance {
	void (*free)(struct ahash_instance *inst);
	union {
		struct {
			char head[offsetof(struct ahash_alg, halg.base)];
			struct crypto_instance base;
		} s;
		struct ahash_alg alg;
	};
};

struct shash_instance {
	void (*free)(struct shash_instance *inst);
	union {
		struct {
			char head[offsetof(struct shash_alg, base)];
			struct crypto_instance base;
		} s;
		struct shash_alg alg;
	};
};

struct crypto_ahash_spawn {
	struct crypto_spawn base;
};

struct crypto_shash_spawn {
	struct crypto_spawn base;
};

int crypto_register_ahash(struct ahash_alg *alg);
void crypto_unregister_ahash(struct ahash_alg *alg);
int crypto_register_ahashes(struct ahash_alg *algs, int count);
void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
int ahash_register_instance(struct crypto_template *tmpl,
			    struct ahash_instance *inst);
void ahash_free_singlespawn_instance(struct ahash_instance *inst);

int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
		    unsigned int keylen);

static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
{
	return alg->setkey != shash_no_setkey;
}

bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);

static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg)
{
	return crypto_shash_alg_has_setkey(alg) &&
		!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
}

static inline bool crypto_hash_alg_needs_key(struct hash_alg_common *alg)
{
	return crypto_hash_alg_has_setkey(alg) &&
		!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
}

int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
		      struct crypto_instance *inst,
		      const char *name, u32 type, u32 mask);

static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
{
	crypto_drop_spawn(&spawn->base);
}

static inline struct hash_alg_common *crypto_spawn_ahash_alg(
	struct crypto_ahash_spawn *spawn)
{
	return __crypto_hash_alg_common(spawn->base.alg);
}

int crypto_register_shash(struct shash_alg *alg);
void crypto_unregister_shash(struct shash_alg *alg);
int crypto_register_shashes(struct shash_alg *algs, int count);
void crypto_unregister_shashes(struct shash_alg *algs, int count);
int shash_register_instance(struct crypto_template *tmpl,
			    struct shash_instance *inst);
void shash_free_singlespawn_instance(struct shash_instance *inst);

int crypto_grab_shash(struct crypto_shash_spawn *spawn,
		      struct crypto_instance *inst,
		      const char *name, u32 type, u32 mask);

static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
{
	crypto_drop_spawn(&spawn->base);
}

static inline struct shash_alg *crypto_spawn_shash_alg(
	struct crypto_shash_spawn *spawn)
{
	return __crypto_shash_alg(spawn->base.alg);
}

int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);

static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
{
	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
}

static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm)
{
	return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
}

static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
{
	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
			    halg);
}

static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash)
{
	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
			    halg);
}

static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm,
					      unsigned int size)
{
	tfm->statesize = size;
}

static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
					    unsigned int reqsize)
{
	tfm->reqsize = reqsize;
}

static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,
						unsigned int reqsize)
{
	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
	ahash->reqsize = reqsize;
}

static inline struct crypto_instance *ahash_crypto_instance(
	struct ahash_instance *inst)
{
	return &inst->s.base;
}

static inline struct ahash_instance *ahash_instance(
	struct crypto_instance *inst)
{
	return container_of(inst, struct ahash_instance, s.base);
}

static inline struct ahash_instance *ahash_alg_instance(
	struct crypto_ahash *ahash)
{
	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
}

static inline void *ahash_instance_ctx(struct ahash_instance *inst)
{
	return crypto_instance_ctx(ahash_crypto_instance(inst));
}

static inline void *ahash_request_ctx_dma(struct ahash_request *req)
{
	unsigned int align = crypto_dma_align();

	if (align <= crypto_tfm_ctx_alignment())
		align = 1;

	return PTR_ALIGN(ahash_request_ctx(req), align);
}

static inline void ahash_request_complete(struct ahash_request *req, int err)
{
	crypto_request_complete(&req->base, err);
}

static inline u32 ahash_request_flags(struct ahash_request *req)
{
	return crypto_request_flags(&req->base) & ~CRYPTO_AHASH_REQ_PRIVATE;
}

static inline struct crypto_ahash *crypto_spawn_ahash(
	struct crypto_ahash_spawn *spawn)
{
	return crypto_spawn_tfm2(&spawn->base);
}

static inline int ahash_enqueue_request(struct crypto_queue *queue,
					     struct ahash_request *request)
{
	return crypto_enqueue_request(queue, &request->base);
}

static inline struct ahash_request *ahash_dequeue_request(
	struct crypto_queue *queue)
{
	return ahash_request_cast(crypto_dequeue_request(queue));
}

static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline struct crypto_instance *shash_crypto_instance(
	struct shash_instance *inst)
{
	return &inst->s.base;
}

static inline struct shash_instance *shash_instance(
	struct crypto_instance *inst)
{
	return container_of(inst, struct shash_instance, s.base);
}

static inline struct shash_instance *shash_alg_instance(
	struct crypto_shash *shash)
{
	return shash_instance(crypto_tfm_alg_instance(&shash->base));
}

static inline void *shash_instance_ctx(struct shash_instance *inst)
{
	return crypto_instance_ctx(shash_crypto_instance(inst));
}

static inline struct crypto_shash *crypto_spawn_shash(
	struct crypto_shash_spawn *spawn)
{
	return crypto_spawn_tfm2(&spawn->base);
}

static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
{
	return container_of(tfm, struct crypto_shash, base);
}

static inline bool ahash_request_isvirt(struct ahash_request *req)
{
	return req->base.flags & CRYPTO_AHASH_REQ_VIRT;
}

static inline bool crypto_ahash_req_virt(struct crypto_ahash *tfm)
{
	return crypto_tfm_req_virt(&tfm->base);
}

static inline struct crypto_ahash *crypto_ahash_fb(struct crypto_ahash *tfm)
{
	return __crypto_ahash_cast(crypto_ahash_tfm(tfm)->fb);
}

static inline struct ahash_request *ahash_fbreq_on_stack_init(
	char *buf, struct ahash_request *old)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(old);
	struct ahash_request *req = (void *)buf;

	crypto_stack_request_init(&req->base,
				  crypto_ahash_tfm(crypto_ahash_fb(tfm)));
	ahash_request_set_callback(req, ahash_request_flags(old), NULL, NULL);
	req->base.flags &= ~CRYPTO_AHASH_REQ_PRIVATE;
	req->base.flags |= old->base.flags & CRYPTO_AHASH_REQ_PRIVATE;
	req->src = old->src;
	req->result = old->result;
	req->nbytes = old->nbytes;

	return req;
}

/* Return the state size without partial block for block-only algorithms. */
static inline unsigned int crypto_shash_coresize(struct crypto_shash *tfm)
{
	return crypto_shash_statesize(tfm) - crypto_shash_blocksize(tfm) - 1;
}

/* This can only be used if the request was never cloned. */
#define HASH_REQUEST_ZERO(name) \
	memzero_explicit(__##name##_req, sizeof(__##name##_req))

/**
 * crypto_ahash_export_core() - extract core state for message digest
 * @req: reference to the ahash_request handle whose state is exported
 * @out: output buffer of sufficient size that can hold the hash state
 *
 * Export the hash state without the partial block buffer.
 *
 * Context: Softirq or process context.
 * Return: 0 if the export creation was successful; < 0 if an error occurred
 */
int crypto_ahash_export_core(struct ahash_request *req, void *out);

/**
 * crypto_ahash_import_core() - import core state
 * @req: reference to ahash_request handle the state is imported into
 * @in: buffer holding the state
 *
 * Import the hash state without the partial block buffer.
 *
 * Context: Softirq or process context.
 * Return: 0 if the import was successful; < 0 if an error occurred
 */
int crypto_ahash_import_core(struct ahash_request *req, const void *in);

/**
 * crypto_shash_export_core() - extract core state for message digest
 * @desc: reference to the operational state handle whose state is exported
 * @out: output buffer of sufficient size that can hold the hash state
 *
 * Export the hash state without the partial block buffer.
 *
 * Context: Softirq or process context.
 * Return: 0 if the export creation was successful; < 0 if an error occurred
 */
int crypto_shash_export_core(struct shash_desc *desc, void *out);

/**
 * crypto_shash_import_core() - import core state
 * @desc: reference to the operational state handle the state imported into
 * @in: buffer holding the state
 *
 * Import the hash state without the partial block buffer.
 *
 * Context: Softirq or process context.
 * Return: 0 if the import was successful; < 0 if an error occurred
 */
int crypto_shash_import_core(struct shash_desc *desc, const void *in);

#endif	/* _CRYPTO_INTERNAL_HASH_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
20036252 HX	2	/*
	3	* Hash algorithms.
	4	*
	5	* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
20036252 HX	6	*/
	7
	8	#ifndef _CRYPTO_INTERNAL_HASH_H
	9	#define _CRYPTO_INTERNAL_HASH_H
	10
	11	#include <crypto/algapi.h>
18e33e6d	12	#include <crypto/hash.h>
20036252	13
7650f826 HX	14	/* Set this bit to handle partial blocks in the API. */
	15	#define CRYPTO_AHASH_ALG_BLOCK_ONLY 0x01000000
	16
	17	/* Set this bit if final requires at least one byte. */
	18	#define CRYPTO_AHASH_ALG_FINAL_NONZERO 0x02000000
	19
	20	/* Set this bit if finup can deal with multiple blocks. */
	21	#define CRYPTO_AHASH_ALG_FINUP_MAX 0x04000000
	22
c6a12f39 HX	23	/* This bit is set by the Crypto API if export_core is not supported. */
	24	#define CRYPTO_AHASH_ALG_NO_EXPORT_CORE 0x08000000
	25
04bfa4c7 HX	26	#define HASH_FBREQ_ON_STACK(name, req) \
	27	char __##name##_req[sizeof(struct ahash_request) + \
	28	MAX_SYNC_HASH_REQSIZE] CRYPTO_MINALIGN_ATTR; \
	29	struct ahash_request *name = ahash_fbreq_on_stack_init( \
	30	__##name##_req, (req))
	31
20036252	32	struct ahash_request;
20036252	33
01c2dece	34	struct ahash_instance {
48fb3e57	35	void (free)(struct ahash_instance inst);
77f7e94d EB	36	union {
	37	struct {
	38	char head[offsetof(struct ahash_alg, halg.base)];
	39	struct crypto_instance base;
	40	} s;
	41	struct ahash_alg alg;
	42	};
01c2dece HX	43	};
01c2dece HX	44
2e4fddd8	45	struct shash_instance {
48fb3e57	46	void (free)(struct shash_instance inst);
1b84e7d0 EB	47	union {
	48	struct {
	49	char head[offsetof(struct shash_alg, base)];
	50	struct crypto_instance base;
	51	} s;
	52	struct shash_alg alg;
	53	};
2e4fddd8 HX	54	};
2e4fddd8 HX	55
01c2dece HX	56	struct crypto_ahash_spawn {
	57	struct crypto_spawn base;
	58	};
	59
94296999 HX	60	struct crypto_shash_spawn {
	61	struct crypto_spawn base;
	62	};
	63
88056ec3	64	int crypto_register_ahash(struct ahash_alg *alg);
c6d633a9	65	void crypto_unregister_ahash(struct ahash_alg *alg);
6f7473c5 RV	66	int crypto_register_ahashes(struct ahash_alg *algs, int count);
6f7473c5 RV	67	void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
01c2dece HX	68	int ahash_register_instance(struct crypto_template *tmpl,
01c2dece HX	69	struct ahash_instance *inst);
c3103416	70	void ahash_free_singlespawn_instance(struct ahash_instance *inst);
01c2dece	71
c060e16d EB	72	int shash_no_setkey(struct crypto_shash tfm, const u8 key,
	73	unsigned int keylen);
	74
	75	static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
	76	{
	77	return alg->setkey != shash_no_setkey;
	78	}
af3ff804	79
c3103416 HX	80	bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
c3103416 HX	81
c2881789 EB	82	static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg)
	83	{
	84	return crypto_shash_alg_has_setkey(alg) &&
	85	!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
	86	}
	87
c3103416 HX	88	static inline bool crypto_hash_alg_needs_key(struct hash_alg_common *alg)
	89	{
	90	return crypto_hash_alg_has_setkey(alg) &&
	91	!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
	92	}
	93
84a9c938 EB	94	int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
	95	struct crypto_instance *inst,
	96	const char *name, u32 type, u32 mask);
	97
52861c7c HX	98	static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
	99	{
	100	crypto_drop_spawn(&spawn->base);
	101	}
	102
84a9c938 EB	103	static inline struct hash_alg_common *crypto_spawn_ahash_alg(
	104	struct crypto_ahash_spawn *spawn)
	105	{
	106	return __crypto_hash_alg_common(spawn->base.alg);
	107	}
	108
7b5a080b	109	int crypto_register_shash(struct shash_alg *alg);
c6d633a9	110	void crypto_unregister_shash(struct shash_alg *alg);
50fc3e8d	111	int crypto_register_shashes(struct shash_alg *algs, int count);
c6d633a9	112	void crypto_unregister_shashes(struct shash_alg *algs, int count);
619a6ebd HX	113	int shash_register_instance(struct crypto_template *tmpl,
619a6ebd HX	114	struct shash_instance *inst);
a39c66cc	115	void shash_free_singlespawn_instance(struct shash_instance *inst);
2e4fddd8	116
fdfad1ff EB	117	int crypto_grab_shash(struct crypto_shash_spawn *spawn,
	118	struct crypto_instance *inst,
	119	const char *name, u32 type, u32 mask);
	120
52861c7c HX	121	static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
	122	{
	123	crypto_drop_spawn(&spawn->base);
	124	}
	125
fdfad1ff EB	126	static inline struct shash_alg *crypto_spawn_shash_alg(
	127	struct crypto_shash_spawn *spawn)
	128	{
	129	return __crypto_shash_alg(spawn->base.alg);
	130	}
	131
7eddf95e	132	int shash_ahash_update(struct ahash_request req, struct shash_desc desc);
66f6ce5e	133	int shash_ahash_finup(struct ahash_request req, struct shash_desc desc);
7eddf95e	134	int shash_ahash_digest(struct ahash_request req, struct shash_desc desc);
1e65b81a	135
18e33e6d HX	136	static inline void crypto_ahash_ctx(struct crypto_ahash tfm)
18e33e6d HX	137	{
88056ec3	138	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
18e33e6d HX	139	}
18e33e6d HX	140
b5f755fb HX	141	static inline void crypto_ahash_ctx_dma(struct crypto_ahash tfm)
	142	{
	143	return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
	144	}
	145
4dc10c01 HX	146	static inline struct ahash_alg __crypto_ahash_alg(struct crypto_alg alg)
	147	{
	148	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
	149	halg);
	150	}
	151
3908edf8 HX	152	static inline struct ahash_alg crypto_ahash_alg(struct crypto_ahash hash)
	153	{
	154	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
	155	halg);
	156	}
	157
c7535fb2 HX	158	static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm,
	159	unsigned int size)
	160	{
	161	tfm->statesize = size;
	162	}
	163
fc00127f HX	164	static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
	165	unsigned int reqsize)
	166	{
88056ec3	167	tfm->reqsize = reqsize;
fc00127f HX	168	}
fc00127f HX	169
b5f755fb HX	170	static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,
	171	unsigned int reqsize)
	172	{
	173	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
	174	ahash->reqsize = reqsize;
	175	}
	176
01c2dece HX	177	static inline struct crypto_instance *ahash_crypto_instance(
	178	struct ahash_instance *inst)
	179	{
77f7e94d	180	return &inst->s.base;
01c2dece HX	181	}
	182
	183	static inline struct ahash_instance *ahash_instance(
	184	struct crypto_instance *inst)
	185	{
77f7e94d	186	return container_of(inst, struct ahash_instance, s.base);
01c2dece HX	187	}
01c2dece HX	188
b00ba76a HX	189	static inline struct ahash_instance *ahash_alg_instance(
	190	struct crypto_ahash *ahash)
	191	{
	192	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
	193	}
	194
01c2dece HX	195	static inline void ahash_instance_ctx(struct ahash_instance inst)
	196	{
	197	return crypto_instance_ctx(ahash_crypto_instance(inst));
	198	}
	199
b5f755fb HX	200	static inline void ahash_request_ctx_dma(struct ahash_request req)
	201	{
	202	unsigned int align = crypto_dma_align();
	203
	204	if (align <= crypto_tfm_ctx_alignment())
	205	align = 1;
	206
	207	return PTR_ALIGN(ahash_request_ctx(req), align);
	208	}
	209
ef0579b6 HX	210	static inline void ahash_request_complete(struct ahash_request *req, int err)
ef0579b6 HX	211	{
d9588045	212	crypto_request_complete(&req->base, err);
ef0579b6 HX	213	}
	214
	215	static inline u32 ahash_request_flags(struct ahash_request *req)
	216	{
04bfa4c7	217	return crypto_request_flags(&req->base) & ~CRYPTO_AHASH_REQ_PRIVATE;
ef0579b6 HX	218	}
ef0579b6 HX	219
01c2dece HX	220	static inline struct crypto_ahash *crypto_spawn_ahash(
	221	struct crypto_ahash_spawn *spawn)
	222	{
	223	return crypto_spawn_tfm2(&spawn->base);
	224	}
	225
18e33e6d HX	226	static inline int ahash_enqueue_request(struct crypto_queue *queue,
	227	struct ahash_request *request)
	228	{
	229	return crypto_enqueue_request(queue, &request->base);
	230	}
	231
	232	static inline struct ahash_request *ahash_dequeue_request(
	233	struct crypto_queue *queue)
	234	{
	235	return ahash_request_cast(crypto_dequeue_request(queue));
	236	}
	237
7b5a080b HX	238	static inline void crypto_shash_ctx(struct crypto_shash tfm)
	239	{
	240	return crypto_tfm_ctx(&tfm->base);
	241	}
	242
2e4fddd8 HX	243	static inline struct crypto_instance *shash_crypto_instance(
	244	struct shash_instance *inst)
	245	{
1b84e7d0	246	return &inst->s.base;
2e4fddd8 HX	247	}
	248
	249	static inline struct shash_instance *shash_instance(
	250	struct crypto_instance *inst)
	251	{
1b84e7d0	252	return container_of(inst, struct shash_instance, s.base);
2e4fddd8 HX	253	}
2e4fddd8 HX	254
d9e1670b HX	255	static inline struct shash_instance *shash_alg_instance(
	256	struct crypto_shash *shash)
	257	{
	258	return shash_instance(crypto_tfm_alg_instance(&shash->base));
	259	}
	260
ef5d590c HX	261	static inline void shash_instance_ctx(struct shash_instance inst)
	262	{
	263	return crypto_instance_ctx(shash_crypto_instance(inst));
	264	}
	265
94296999 HX	266	static inline struct crypto_shash *crypto_spawn_shash(
	267	struct crypto_shash_spawn *spawn)
	268	{
	269	return crypto_spawn_tfm2(&spawn->base);
	270	}
	271
0390e6ae HX	272	static inline struct crypto_shash __crypto_shash_cast(struct crypto_tfm tfm)
0390e6ae HX	273	{
113adefc	274	return container_of(tfm, struct crypto_shash, base);
0390e6ae HX	275	}
0390e6ae HX	276
439963cd HX	277	static inline bool ahash_request_isvirt(struct ahash_request *req)
	278	{
	279	return req->base.flags & CRYPTO_AHASH_REQ_VIRT;
	280	}
	281
8fd17374	282	static inline bool crypto_ahash_req_virt(struct crypto_ahash *tfm)
f2ffe5a9	283	{
8fd17374	284	return crypto_tfm_req_virt(&tfm->base);
f2ffe5a9 HX	285	}
f2ffe5a9 HX	286
19da081a HX	287	static inline struct crypto_ahash crypto_ahash_fb(struct crypto_ahash tfm)
	288	{
	289	return __crypto_ahash_cast(crypto_ahash_tfm(tfm)->fb);
	290	}
	291
04bfa4c7 HX	292	static inline struct ahash_request *ahash_fbreq_on_stack_init(
	293	char buf, struct ahash_request old)
	294	{
	295	struct crypto_ahash *tfm = crypto_ahash_reqtfm(old);
	296	struct ahash_request req = (void )buf;
	297
b75fa20c HX	298	crypto_stack_request_init(&req->base,
b75fa20c HX	299	crypto_ahash_tfm(crypto_ahash_fb(tfm)));
04bfa4c7 HX	300	ahash_request_set_callback(req, ahash_request_flags(old), NULL, NULL);
	301	req->base.flags &= ~CRYPTO_AHASH_REQ_PRIVATE;
	302	req->base.flags \|= old->base.flags & CRYPTO_AHASH_REQ_PRIVATE;
	303	req->src = old->src;
	304	req->result = old->result;
	305	req->nbytes = old->nbytes;
	306
	307	return req;
	308	}
	309
7650f826 HX	310	/* Return the state size without partial block for block-only algorithms. */
	311	static inline unsigned int crypto_shash_coresize(struct crypto_shash *tfm)
	312	{
	313	return crypto_shash_statesize(tfm) - crypto_shash_blocksize(tfm) - 1;
	314	}
	315
88bca957 HX	316	/* This can only be used if the request was never cloned. */
	317	#define HASH_REQUEST_ZERO(name) \
	318	memzero_explicit(__##name##_req, sizeof(__##name##_req))
	319
cd5a4d53 HX	320	/**
	321	* crypto_ahash_export_core() - extract core state for message digest
	322	* @req: reference to the ahash_request handle whose state is exported
	323	* @out: output buffer of sufficient size that can hold the hash state
	324	*
	325	* Export the hash state without the partial block buffer.
	326	*
	327	* Context: Softirq or process context.
	328	* Return: 0 if the export creation was successful; < 0 if an error occurred
	329	*/
	330	int crypto_ahash_export_core(struct ahash_request req, void out);
	331
	332	/**
	333	* crypto_ahash_import_core() - import core state
	334	* @req: reference to ahash_request handle the state is imported into
	335	* @in: buffer holding the state
	336	*
	337	* Import the hash state without the partial block buffer.
	338	*
	339	* Context: Softirq or process context.
	340	* Return: 0 if the import was successful; < 0 if an error occurred
	341	*/
	342	int crypto_ahash_import_core(struct ahash_request req, const void in);
	343
	344	/**
	345	* crypto_shash_export_core() - extract core state for message digest
	346	* @desc: reference to the operational state handle whose state is exported
	347	* @out: output buffer of sufficient size that can hold the hash state
	348	*
	349	* Export the hash state without the partial block buffer.
	350	*
	351	* Context: Softirq or process context.
	352	* Return: 0 if the export creation was successful; < 0 if an error occurred
	353	*/
	354	int crypto_shash_export_core(struct shash_desc desc, void out);
	355
	356	/**
	357	* crypto_shash_import_core() - import core state
	358	* @desc: reference to the operational state handle the state imported into
	359	* @in: buffer holding the state
	360	*
	361	* Import the hash state without the partial block buffer.
	362	*
	363	* Context: Softirq or process context.
	364	* Return: 0 if the import was successful; < 0 if an error occurred
	365	*/
	366	int crypto_shash_import_core(struct shash_desc desc, const void in);
	367
20036252 HX	368	#endif /* _CRYPTO_INTERNAL_HASH_H */
20036252 HX	369