[mirror_ubuntu-bionic-kernel.git] / include / crypto / algapi.h

/*
 * Cryptographic API for algorithms (i.e., low-level API).
 *
 * Copyright (c) 2006 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_ALGAPI_H
#define _CRYPTO_ALGAPI_H

#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>

struct crypto_aead;
struct module;
struct rtattr;
struct seq_file;

struct crypto_type {
	unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
	unsigned int (*extsize)(struct crypto_alg *alg);
	int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
	int (*init_tfm)(struct crypto_tfm *tfm);
	void (*show)(struct seq_file *m, struct crypto_alg *alg);
	int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
	struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);

	unsigned int type;
	unsigned int maskclear;
	unsigned int maskset;
	unsigned int tfmsize;
};

struct crypto_instance {
	struct crypto_alg alg;

	struct crypto_template *tmpl;
	struct hlist_node list;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct crypto_template {
	struct list_head list;
	struct hlist_head instances;
	struct module *module;

	struct crypto_instance *(*alloc)(struct rtattr **tb);
	void (*free)(struct crypto_instance *inst);
	int (*create)(struct crypto_template *tmpl, struct rtattr **tb);

	char name[CRYPTO_MAX_ALG_NAME];
};

struct crypto_spawn {
	struct list_head list;
	struct crypto_alg *alg;
	struct crypto_instance *inst;
	const struct crypto_type *frontend;
	u32 mask;
};

struct crypto_queue {
	struct list_head list;
	struct list_head *backlog;

	unsigned int qlen;
	unsigned int max_qlen;
};

struct scatter_walk {
	struct scatterlist *sg;
	unsigned int offset;
};

struct blkcipher_walk {
	union {
		struct {
			struct page *page;
			unsigned long offset;
		} phys;

		struct {
			u8 *page;
			u8 *addr;
		} virt;
	} src, dst;

	struct scatter_walk in;
	unsigned int nbytes;

	struct scatter_walk out;
	unsigned int total;

	void *page;
	u8 *buffer;
	u8 *iv;
	unsigned int ivsize;

	int flags;
	unsigned int walk_blocksize;
	unsigned int cipher_blocksize;
	unsigned int alignmask;
};

struct ablkcipher_walk {
	struct {
		struct page *page;
		unsigned int offset;
	} src, dst;

	struct scatter_walk	in;
	unsigned int		nbytes;
	struct scatter_walk	out;
	unsigned int		total;
	struct list_head	buffers;
	u8			*iv_buffer;
	u8			*iv;
	int			flags;
	unsigned int		blocksize;
};

extern const struct crypto_type crypto_ablkcipher_type;
extern const struct crypto_type crypto_blkcipher_type;

void crypto_mod_put(struct crypto_alg *alg);

int crypto_register_template(struct crypto_template *tmpl);
void crypto_unregister_template(struct crypto_template *tmpl);
struct crypto_template *crypto_lookup_template(const char *name);

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

int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
		      struct crypto_instance *inst, u32 mask);
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
		       struct crypto_instance *inst,
		       const struct crypto_type *frontend);
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
		      u32 type, u32 mask);

void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
				    u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);

static inline void crypto_set_spawn(struct crypto_spawn *spawn,
				    struct crypto_instance *inst)
{
	spawn->inst = inst;
}

struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta);
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
				    const struct crypto_type *frontend,
				    u32 type, u32 mask);

static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
						 u32 type, u32 mask)
{
	return crypto_attr_alg2(rta, NULL, type, mask);
}

int crypto_attr_u32(struct rtattr *rta, u32 *num);
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
			     unsigned int head);
struct crypto_instance *crypto_alloc_instance(const char *name,
					      struct crypto_alg *alg);

void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
int crypto_enqueue_request(struct crypto_queue *queue,
			   struct crypto_async_request *request);
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);

/* These functions require the input/output to be aligned as u32. */
void crypto_inc(u8 *a, unsigned int size);
void crypto_xor(u8 *dst, const u8 *src, unsigned int size);

int blkcipher_walk_done(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk, int err);
int blkcipher_walk_virt(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_phys(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
			      struct blkcipher_walk *walk,
			      unsigned int blocksize);
int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
				   struct blkcipher_walk *walk,
				   struct crypto_aead *tfm,
				   unsigned int blocksize);

int ablkcipher_walk_done(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk, int err);
int ablkcipher_walk_phys(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk);
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);

static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
	return PTR_ALIGN(crypto_tfm_ctx(tfm),
			 crypto_tfm_alg_alignmask(tfm) + 1);
}

static inline struct crypto_instance *crypto_tfm_alg_instance(
	struct crypto_tfm *tfm)
{
	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
}

static inline void *crypto_instance_ctx(struct crypto_instance *inst)
{
	return inst->__ctx;
}

static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	struct crypto_ablkcipher *tfm)
{
	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
}

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

static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

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

static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_cipher *crypto_spawn_cipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
{
	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
}

static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_HASH;
	u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;

	return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
}

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

static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
				       struct scatterlist *dst,
				       struct scatterlist *src,
				       unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
}

static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
					struct scatterlist *dst,
					struct scatterlist *src,
					unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
	INIT_LIST_HEAD(&walk->buffers);
}

static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
{
	if (unlikely(!list_empty(&walk->buffers)))
		__ablkcipher_walk_complete(walk);
}

static inline struct crypto_async_request *crypto_get_backlog(
	struct crypto_queue *queue)
{
	return queue->backlog == &queue->list ? NULL :
	       container_of(queue->backlog, struct crypto_async_request, list);
}

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

static inline struct ablkcipher_request *ablkcipher_dequeue_request(
	struct crypto_queue *queue)
{
	return ablkcipher_request_cast(crypto_dequeue_request(queue));
}

static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
{
	return req->__ctx;
}

static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
					  struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
}

static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
						     u32 type, u32 mask)
{
	return crypto_attr_alg(tb[1], type, mask);
}

/*
 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
 * Otherwise returns zero.
 */
static inline int crypto_requires_sync(u32 type, u32 mask)
{
	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
}

noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);

/**
 * crypto_memneq - Compare two areas of memory without leaking
 *		   timing information.
 *
 * @a: One area of memory
 * @b: Another area of memory
 * @size: The size of the area.
 *
 * Returns 0 when data is equal, 1 otherwise.
 */
static inline int crypto_memneq(const void *a, const void *b, size_t size)
{
	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
}

static inline void crypto_yield(u32 flags)
{
	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
		cond_resched();
}

#endif	/* _CRYPTO_ALGAPI_H */
Commit	Line	Data
cce9e06d HX	1	/*
	2	* Cryptographic API for algorithms (i.e., low-level API).
	3	*
	4	* Copyright (c) 2006 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	#ifndef _CRYPTO_ALGAPI_H
	13	#define _CRYPTO_ALGAPI_H
	14
	15	#include <linux/crypto.h>
b5b7f088 HX	16	#include <linux/list.h>
b5b7f088 HX	17	#include <linux/kernel.h>
b6aa63c0	18	#include <linux/skbuff.h>
cce9e06d	19
5d1d65f8	20	struct crypto_aead;
4cc7720c	21	struct module;
ebc610e5	22	struct rtattr;
e853c3cf HX	23	struct seq_file;
	24
	25	struct crypto_type {
27d2a330	26	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
2ca33da1	27	unsigned int (extsize)(struct crypto_alg alg);
27d2a330	28	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
2ca33da1	29	int (init_tfm)(struct crypto_tfm tfm);
e853c3cf	30	void (show)(struct seq_file m, struct crypto_alg *alg);
b6aa63c0	31	int (report)(struct sk_buff skb, struct crypto_alg *alg);
7b0bac64 HX	32	struct crypto_alg (lookup)(const char *name, u32 type, u32 mask);
	33
	34	unsigned int type;
	35	unsigned int maskclear;
	36	unsigned int maskset;
	37	unsigned int tfmsize;
e853c3cf	38	};
4cc7720c HX	39
	40	struct crypto_instance {
	41	struct crypto_alg alg;
	42
	43	struct crypto_template *tmpl;
	44	struct hlist_node list;
	45
	46	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	47	};
	48
	49	struct crypto_template {
	50	struct list_head list;
	51	struct hlist_head instances;
	52	struct module *module;
	53
ebc610e5	54	struct crypto_instance (alloc)(struct rtattr **tb);
4cc7720c	55	void (free)(struct crypto_instance inst);
f2ac72e8	56	int (create)(struct crypto_template tmpl, struct rtattr **tb);
4cc7720c HX	57
	58	char name[CRYPTO_MAX_ALG_NAME];
	59	};
	60
6bfd4809 HX	61	struct crypto_spawn {
	62	struct list_head list;
	63	struct crypto_alg *alg;
	64	struct crypto_instance *inst;
97eedce1	65	const struct crypto_type *frontend;
a73e6996	66	u32 mask;
6bfd4809 HX	67	};
6bfd4809 HX	68
b5b7f088 HX	69	struct crypto_queue {
	70	struct list_head list;
	71	struct list_head *backlog;
	72
	73	unsigned int qlen;
	74	unsigned int max_qlen;
	75	};
	76
5c64097a HX	77	struct scatter_walk {
	78	struct scatterlist *sg;
	79	unsigned int offset;
	80	};
	81
5cde0af2 HX	82	struct blkcipher_walk {
	83	union {
	84	struct {
	85	struct page *page;
	86	unsigned long offset;
	87	} phys;
	88
	89	struct {
	90	u8 *page;
	91	u8 *addr;
	92	} virt;
	93	} src, dst;
	94
	95	struct scatter_walk in;
	96	unsigned int nbytes;
	97
	98	struct scatter_walk out;
	99	unsigned int total;
	100
	101	void *page;
	102	u8 *buffer;
	103	u8 *iv;
822be00f	104	unsigned int ivsize;
5cde0af2 HX	105
5cde0af2 HX	106	int flags;
822be00f AB	107	unsigned int walk_blocksize;
	108	unsigned int cipher_blocksize;
	109	unsigned int alignmask;
5cde0af2 HX	110	};
5cde0af2 HX	111
bf06099d DM	112	struct ablkcipher_walk {
	113	struct {
	114	struct page *page;
	115	unsigned int offset;
	116	} src, dst;
	117
	118	struct scatter_walk in;
	119	unsigned int nbytes;
	120	struct scatter_walk out;
	121	unsigned int total;
	122	struct list_head buffers;
	123	u8 *iv_buffer;
	124	u8 *iv;
	125	int flags;
	126	unsigned int blocksize;
	127	};
	128
b5b7f088	129	extern const struct crypto_type crypto_ablkcipher_type;
5cde0af2 HX	130	extern const struct crypto_type crypto_blkcipher_type;
5cde0af2 HX	131
db131ef9 HX	132	void crypto_mod_put(struct crypto_alg *alg);
db131ef9 HX	133
4cc7720c HX	134	int crypto_register_template(struct crypto_template *tmpl);
	135	void crypto_unregister_template(struct crypto_template *tmpl);
	136	struct crypto_template crypto_lookup_template(const char name);
	137
9cd899a3 HX	138	int crypto_register_instance(struct crypto_template *tmpl,
9cd899a3 HX	139	struct crypto_instance *inst);
87b16756	140	int crypto_unregister_instance(struct crypto_instance *inst);
9cd899a3	141
6bfd4809	142	int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,
a73e6996	143	struct crypto_instance *inst, u32 mask);
97eedce1 HX	144	int crypto_init_spawn2(struct crypto_spawn spawn, struct crypto_alg alg,
	145	struct crypto_instance *inst,
	146	const struct crypto_type *frontend);
d6ef2f19 HX	147	int crypto_grab_spawn(struct crypto_spawn spawn, const char name,
d6ef2f19 HX	148	u32 type, u32 mask);
97eedce1	149
6bfd4809	150	void crypto_drop_spawn(struct crypto_spawn *spawn);
2e306ee0 HX	151	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
2e306ee0 HX	152	u32 mask);
97eedce1	153	void crypto_spawn_tfm2(struct crypto_spawn spawn);
6bfd4809	154
378f4f51 HX	155	static inline void crypto_set_spawn(struct crypto_spawn *spawn,
	156	struct crypto_instance *inst)
	157	{
	158	spawn->inst = inst;
	159	}
	160
ebc610e5 HX	161	struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb);
ebc610e5 HX	162	int crypto_check_attr_type(struct rtattr **tb, u32 type);
68b6c7d6	163	const char crypto_attr_alg_name(struct rtattr rta);
d06854f0 HX	164	struct crypto_alg crypto_attr_alg2(struct rtattr rta,
	165	const struct crypto_type *frontend,
	166	u32 type, u32 mask);
	167
	168	static inline struct crypto_alg crypto_attr_alg(struct rtattr rta,
	169	u32 type, u32 mask)
	170	{
	171	return crypto_attr_alg2(rta, NULL, type, mask);
	172	}
	173
3c09f17c	174	int crypto_attr_u32(struct rtattr rta, u32 num);
70ec7bb9 HX	175	void crypto_alloc_instance2(const char name, struct crypto_alg *alg,
70ec7bb9 HX	176	unsigned int head);
7fed0bf2 HX	177	struct crypto_instance crypto_alloc_instance(const char name,
	178	struct crypto_alg *alg);
	179
b5b7f088 HX	180	void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
	181	int crypto_enqueue_request(struct crypto_queue *queue,
	182	struct crypto_async_request *request);
	183	struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue);
	184	int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm);
	185
7613636d HX	186	/* These functions require the input/output to be aligned as u32. */
	187	void crypto_inc(u8 *a, unsigned int size);
	188	void crypto_xor(u8 dst, const u8 src, unsigned int size);
	189
5cde0af2 HX	190	int blkcipher_walk_done(struct blkcipher_desc *desc,
	191	struct blkcipher_walk *walk, int err);
	192	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	193	struct blkcipher_walk *walk);
	194	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	195	struct blkcipher_walk *walk);
7607bd8f HX	196	int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
	197	struct blkcipher_walk *walk,
	198	unsigned int blocksize);
4f7f1d7c AB	199	int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
	200	struct blkcipher_walk *walk,
	201	struct crypto_aead *tfm,
	202	unsigned int blocksize);
5cde0af2	203
bf06099d DM	204	int ablkcipher_walk_done(struct ablkcipher_request *req,
	205	struct ablkcipher_walk *walk, int err);
	206	int ablkcipher_walk_phys(struct ablkcipher_request *req,
	207	struct ablkcipher_walk *walk);
	208	void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
	209
5cde0af2 HX	210	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
5cde0af2 HX	211	{
ab300465 HX	212	return PTR_ALIGN(crypto_tfm_ctx(tfm),
ab300465 HX	213	crypto_tfm_alg_alignmask(tfm) + 1);
5cde0af2 HX	214	}
5cde0af2 HX	215
124b53d0 HX	216	static inline struct crypto_instance *crypto_tfm_alg_instance(
	217	struct crypto_tfm *tfm)
	218	{
	219	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
	220	}
	221
4cc7720c HX	222	static inline void crypto_instance_ctx(struct crypto_instance inst)
	223	{
	224	return inst->__ctx;
	225	}
	226
b5b7f088 HX	227	static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	228	struct crypto_ablkcipher *tfm)
	229	{
	230	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
	231	}
	232
	233	static inline void crypto_ablkcipher_ctx(struct crypto_ablkcipher tfm)
	234	{
	235	return crypto_tfm_ctx(&tfm->base);
	236	}
	237
aa379a6a SS	238	static inline void crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher tfm)
	239	{
	240	return crypto_tfm_ctx_aligned(&tfm->base);
	241	}
	242
124b53d0 HX	243	static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	244	struct crypto_spawn *spawn)
	245	{
	246	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
332f8840	247	u32 mask = CRYPTO_ALG_TYPE_MASK;
124b53d0 HX	248
	249	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
	250	}
	251
5cde0af2 HX	252	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	253	{
	254	return crypto_tfm_ctx(&tfm->base);
	255	}
	256
	257	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	258	{
	259	return crypto_tfm_ctx_aligned(&tfm->base);
	260	}
	261
2e306ee0 HX	262	static inline struct crypto_cipher *crypto_spawn_cipher(
	263	struct crypto_spawn *spawn)
	264	{
	265	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	266	u32 mask = CRYPTO_ALG_TYPE_MASK;
	267
	268	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	269	}
	270
f28776a3 HX	271	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	272	{
	273	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	274	}
	275
2e306ee0 HX	276	static inline struct crypto_hash crypto_spawn_hash(struct crypto_spawn spawn)
	277	{
	278	u32 type = CRYPTO_ALG_TYPE_HASH;
	279	u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
	280
	281	return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
	282	}
	283
5f7082ed HX	284	static inline void crypto_hash_ctx(struct crypto_hash tfm)
	285	{
	286	return crypto_tfm_ctx(&tfm->base);
	287	}
	288
055bcee3 HX	289	static inline void crypto_hash_ctx_aligned(struct crypto_hash tfm)
	290	{
	291	return crypto_tfm_ctx_aligned(&tfm->base);
	292	}
	293
5cde0af2 HX	294	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	295	struct scatterlist *dst,
	296	struct scatterlist *src,
	297	unsigned int nbytes)
	298	{
	299	walk->in.sg = src;
	300	walk->out.sg = dst;
	301	walk->total = nbytes;
	302	}
	303
bf06099d DM	304	static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
	305	struct scatterlist *dst,
	306	struct scatterlist *src,
	307	unsigned int nbytes)
	308	{
	309	walk->in.sg = src;
	310	walk->out.sg = dst;
	311	walk->total = nbytes;
	312	INIT_LIST_HEAD(&walk->buffers);
	313	}
	314
	315	static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
	316	{
	317	if (unlikely(!list_empty(&walk->buffers)))
	318	__ablkcipher_walk_complete(walk);
	319	}
	320
b5b7f088 HX	321	static inline struct crypto_async_request *crypto_get_backlog(
	322	struct crypto_queue *queue)
	323	{
	324	return queue->backlog == &queue->list ? NULL :
	325	container_of(queue->backlog, struct crypto_async_request, list);
	326	}
	327
2de98e75	328	static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
b5b7f088 HX	329	struct ablkcipher_request *request)
b5b7f088 HX	330	{
2de98e75	331	return crypto_enqueue_request(queue, &request->base);
b5b7f088 HX	332	}
	333
	334	static inline struct ablkcipher_request *ablkcipher_dequeue_request(
2de98e75	335	struct crypto_queue *queue)
b5b7f088	336	{
2de98e75	337	return ablkcipher_request_cast(crypto_dequeue_request(queue));
b5b7f088 HX	338	}
	339
	340	static inline void ablkcipher_request_ctx(struct ablkcipher_request req)
	341	{
	342	return req->__ctx;
	343	}
	344
2de98e75 HX	345	static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
2de98e75 HX	346	struct crypto_ablkcipher *tfm)
b5b7f088	347	{
2de98e75	348	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
b5b7f088 HX	349	}
b5b7f088 HX	350
3c09f17c HX	351	static inline struct crypto_alg crypto_get_attr_alg(struct rtattr *tb,
	352	u32 type, u32 mask)
	353	{
	354	return crypto_attr_alg(tb[1], type, mask);
	355	}
	356
378f4f51 HX	357	/*
	358	* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
	359	* Otherwise returns zero.
	360	*/
	361	static inline int crypto_requires_sync(u32 type, u32 mask)
	362	{
	363	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
	364	}
	365
6bf37e5a JY	366	noinline unsigned long __crypto_memneq(const void a, const void b, size_t size);
	367
	368	/**
	369	* crypto_memneq - Compare two areas of memory without leaking
	370	* timing information.
	371	*
	372	* @a: One area of memory
	373	* @b: Another area of memory
	374	* @size: The size of the area.
	375	*
	376	* Returns 0 when data is equal, 1 otherwise.
	377	*/
	378	static inline int crypto_memneq(const void a, const void b, size_t size)
	379	{
	380	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
	381	}
cce9e06d	382
bb55a4c1 MV	383	static inline void crypto_yield(u32 flags)
	384	{
	385	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
	386	cond_resched();
	387	}
	388
6bf37e5a	389	#endif /* _CRYPTO_ALGAPI_H */