[linux.git] / include / crypto / algapi.h

/*
 * Cryptographic API for algorithms (i.e., low-level API).
 *
 * Copyright (c) 2006 Herbert Xu <[email protected]>
 *
 * 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 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_aead_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_alg *alg);

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);

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);
void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
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 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 aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
{
	return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
}

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

static inline struct crypto_instance *crypto_aead_alg_instance(
	struct crypto_aead *aead)
{
	return crypto_tfm_alg_instance(&aead->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 void *aead_request_ctx(struct aead_request *req)
{
	return req->__ctx;
}

static inline void aead_request_complete(struct aead_request *req, int err)
{
	req->base.complete(&req->base, err);
}

static inline u32 aead_request_flags(struct aead_request *req)
{
	return req->base.flags;
}

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;
}

#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 <[email protected]>
	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
4cc7720c	20	struct module;
ebc610e5	21	struct rtattr;
e853c3cf HX	22	struct seq_file;
	23
	24	struct crypto_type {
27d2a330	25	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
2ca33da1	26	unsigned int (extsize)(struct crypto_alg alg);
27d2a330	27	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
2ca33da1	28	int (init_tfm)(struct crypto_tfm tfm);
e853c3cf	29	void (show)(struct seq_file m, struct crypto_alg *alg);
b6aa63c0	30	int (report)(struct sk_buff skb, struct crypto_alg *alg);
7b0bac64 HX	31	struct crypto_alg (lookup)(const char *name, u32 type, u32 mask);
	32
	33	unsigned int type;
	34	unsigned int maskclear;
	35	unsigned int maskset;
	36	unsigned int tfmsize;
e853c3cf	37	};
4cc7720c HX	38
	39	struct crypto_instance {
	40	struct crypto_alg alg;
	41
	42	struct crypto_template *tmpl;
	43	struct hlist_node list;
	44
	45	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	46	};
	47
	48	struct crypto_template {
	49	struct list_head list;
	50	struct hlist_head instances;
	51	struct module *module;
	52
ebc610e5	53	struct crypto_instance (alloc)(struct rtattr **tb);
4cc7720c	54	void (free)(struct crypto_instance inst);
f2ac72e8	55	int (create)(struct crypto_template tmpl, struct rtattr **tb);
4cc7720c HX	56
	57	char name[CRYPTO_MAX_ALG_NAME];
	58	};
	59
6bfd4809 HX	60	struct crypto_spawn {
	61	struct list_head list;
	62	struct crypto_alg *alg;
	63	struct crypto_instance *inst;
97eedce1	64	const struct crypto_type *frontend;
a73e6996	65	u32 mask;
6bfd4809 HX	66	};
6bfd4809 HX	67
b5b7f088 HX	68	struct crypto_queue {
	69	struct list_head list;
	70	struct list_head *backlog;
	71
	72	unsigned int qlen;
	73	unsigned int max_qlen;
	74	};
	75
5c64097a HX	76	struct scatter_walk {
	77	struct scatterlist *sg;
	78	unsigned int offset;
	79	};
	80
5cde0af2 HX	81	struct blkcipher_walk {
	82	union {
	83	struct {
	84	struct page *page;
	85	unsigned long offset;
	86	} phys;
	87
	88	struct {
	89	u8 *page;
	90	u8 *addr;
	91	} virt;
	92	} src, dst;
	93
	94	struct scatter_walk in;
	95	unsigned int nbytes;
	96
	97	struct scatter_walk out;
	98	unsigned int total;
	99
	100	void *page;
	101	u8 *buffer;
	102	u8 *iv;
822be00f	103	unsigned int ivsize;
5cde0af2 HX	104
5cde0af2 HX	105	int flags;
822be00f AB	106	unsigned int walk_blocksize;
	107	unsigned int cipher_blocksize;
	108	unsigned int alignmask;
5cde0af2 HX	109	};
5cde0af2 HX	110
bf06099d DM	111	struct ablkcipher_walk {
	112	struct {
	113	struct page *page;
	114	unsigned int offset;
	115	} src, dst;
	116
	117	struct scatter_walk in;
	118	unsigned int nbytes;
	119	struct scatter_walk out;
	120	unsigned int total;
	121	struct list_head buffers;
	122	u8 *iv_buffer;
	123	u8 *iv;
	124	int flags;
	125	unsigned int blocksize;
	126	};
	127
b5b7f088	128	extern const struct crypto_type crypto_ablkcipher_type;
1ae97820	129	extern const struct crypto_type crypto_aead_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);
ce3fd840	140	int crypto_unregister_instance(struct crypto_alg *alg);
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);
	147
6bfd4809	148	void crypto_drop_spawn(struct crypto_spawn *spawn);
2e306ee0 HX	149	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
2e306ee0 HX	150	u32 mask);
97eedce1	151	void crypto_spawn_tfm2(struct crypto_spawn spawn);
6bfd4809	152
378f4f51 HX	153	static inline void crypto_set_spawn(struct crypto_spawn *spawn,
	154	struct crypto_instance *inst)
	155	{
	156	spawn->inst = inst;
	157	}
	158
ebc610e5 HX	159	struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb);
ebc610e5 HX	160	int crypto_check_attr_type(struct rtattr **tb, u32 type);
68b6c7d6	161	const char crypto_attr_alg_name(struct rtattr rta);
d06854f0 HX	162	struct crypto_alg crypto_attr_alg2(struct rtattr rta,
	163	const struct crypto_type *frontend,
	164	u32 type, u32 mask);
	165
	166	static inline struct crypto_alg crypto_attr_alg(struct rtattr rta,
	167	u32 type, u32 mask)
	168	{
	169	return crypto_attr_alg2(rta, NULL, type, mask);
	170	}
	171
3c09f17c	172	int crypto_attr_u32(struct rtattr rta, u32 num);
70ec7bb9 HX	173	void crypto_alloc_instance2(const char name, struct crypto_alg *alg,
70ec7bb9 HX	174	unsigned int head);
7fed0bf2 HX	175	struct crypto_instance crypto_alloc_instance(const char name,
	176	struct crypto_alg *alg);
	177
b5b7f088 HX	178	void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
	179	int crypto_enqueue_request(struct crypto_queue *queue,
	180	struct crypto_async_request *request);
0c7d400f	181	void __crypto_dequeue_request(struct crypto_queue queue, unsigned int offset);
b5b7f088 HX	182	struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue);
	183	int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm);
	184
7613636d HX	185	/* These functions require the input/output to be aligned as u32. */
	186	void crypto_inc(u8 *a, unsigned int size);
	187	void crypto_xor(u8 dst, const u8 src, unsigned int size);
	188
5cde0af2 HX	189	int blkcipher_walk_done(struct blkcipher_desc *desc,
	190	struct blkcipher_walk *walk, int err);
	191	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	192	struct blkcipher_walk *walk);
	193	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	194	struct blkcipher_walk *walk);
7607bd8f HX	195	int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
	196	struct blkcipher_walk *walk,
	197	unsigned int blocksize);
5cde0af2	198
bf06099d DM	199	int ablkcipher_walk_done(struct ablkcipher_request *req,
	200	struct ablkcipher_walk *walk, int err);
	201	int ablkcipher_walk_phys(struct ablkcipher_request *req,
	202	struct ablkcipher_walk *walk);
	203	void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
	204
5cde0af2 HX	205	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
5cde0af2 HX	206	{
ab300465 HX	207	return PTR_ALIGN(crypto_tfm_ctx(tfm),
ab300465 HX	208	crypto_tfm_alg_alignmask(tfm) + 1);
5cde0af2 HX	209	}
5cde0af2 HX	210
124b53d0 HX	211	static inline struct crypto_instance *crypto_tfm_alg_instance(
	212	struct crypto_tfm *tfm)
	213	{
	214	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
	215	}
	216
4cc7720c HX	217	static inline void crypto_instance_ctx(struct crypto_instance inst)
	218	{
	219	return inst->__ctx;
	220	}
	221
b5b7f088 HX	222	static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	223	struct crypto_ablkcipher *tfm)
	224	{
	225	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
	226	}
	227
	228	static inline void crypto_ablkcipher_ctx(struct crypto_ablkcipher tfm)
	229	{
	230	return crypto_tfm_ctx(&tfm->base);
	231	}
	232
aa379a6a SS	233	static inline void crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher tfm)
	234	{
	235	return crypto_tfm_ctx_aligned(&tfm->base);
	236	}
	237
1ae97820 HX	238	static inline struct aead_alg crypto_aead_alg(struct crypto_aead tfm)
	239	{
	240	return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
	241	}
	242
3c09f17c HX	243	static inline void crypto_aead_ctx(struct crypto_aead tfm)
	244	{
	245	return crypto_tfm_ctx(&tfm->base);
	246	}
	247
	248	static inline struct crypto_instance *crypto_aead_alg_instance(
	249	struct crypto_aead *aead)
	250	{
	251	return crypto_tfm_alg_instance(&aead->base);
	252	}
	253
124b53d0 HX	254	static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	255	struct crypto_spawn *spawn)
	256	{
	257	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
332f8840	258	u32 mask = CRYPTO_ALG_TYPE_MASK;
124b53d0 HX	259
	260	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
	261	}
	262
5cde0af2 HX	263	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	264	{
	265	return crypto_tfm_ctx(&tfm->base);
	266	}
	267
	268	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	269	{
	270	return crypto_tfm_ctx_aligned(&tfm->base);
	271	}
	272
2e306ee0 HX	273	static inline struct crypto_cipher *crypto_spawn_cipher(
	274	struct crypto_spawn *spawn)
	275	{
	276	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	277	u32 mask = CRYPTO_ALG_TYPE_MASK;
	278
	279	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	280	}
	281
f28776a3 HX	282	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	283	{
	284	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	285	}
	286
2e306ee0 HX	287	static inline struct crypto_hash crypto_spawn_hash(struct crypto_spawn spawn)
	288	{
	289	u32 type = CRYPTO_ALG_TYPE_HASH;
	290	u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
	291
	292	return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
	293	}
	294
5f7082ed HX	295	static inline void crypto_hash_ctx(struct crypto_hash tfm)
	296	{
	297	return crypto_tfm_ctx(&tfm->base);
	298	}
	299
055bcee3 HX	300	static inline void crypto_hash_ctx_aligned(struct crypto_hash tfm)
	301	{
	302	return crypto_tfm_ctx_aligned(&tfm->base);
	303	}
	304
5cde0af2 HX	305	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	306	struct scatterlist *dst,
	307	struct scatterlist *src,
	308	unsigned int nbytes)
	309	{
	310	walk->in.sg = src;
	311	walk->out.sg = dst;
	312	walk->total = nbytes;
	313	}
	314
bf06099d DM	315	static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
	316	struct scatterlist *dst,
	317	struct scatterlist *src,
	318	unsigned int nbytes)
	319	{
	320	walk->in.sg = src;
	321	walk->out.sg = dst;
	322	walk->total = nbytes;
	323	INIT_LIST_HEAD(&walk->buffers);
	324	}
	325
	326	static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
	327	{
	328	if (unlikely(!list_empty(&walk->buffers)))
	329	__ablkcipher_walk_complete(walk);
	330	}
	331
b5b7f088 HX	332	static inline struct crypto_async_request *crypto_get_backlog(
	333	struct crypto_queue *queue)
	334	{
	335	return queue->backlog == &queue->list ? NULL :
	336	container_of(queue->backlog, struct crypto_async_request, list);
	337	}
	338
2de98e75	339	static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
b5b7f088 HX	340	struct ablkcipher_request *request)
b5b7f088 HX	341	{
2de98e75	342	return crypto_enqueue_request(queue, &request->base);
b5b7f088 HX	343	}
	344
	345	static inline struct ablkcipher_request *ablkcipher_dequeue_request(
2de98e75	346	struct crypto_queue *queue)
b5b7f088	347	{
2de98e75	348	return ablkcipher_request_cast(crypto_dequeue_request(queue));
b5b7f088 HX	349	}
	350
	351	static inline void ablkcipher_request_ctx(struct ablkcipher_request req)
	352	{
	353	return req->__ctx;
	354	}
	355
2de98e75 HX	356	static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
2de98e75 HX	357	struct crypto_ablkcipher *tfm)
b5b7f088	358	{
2de98e75	359	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
b5b7f088 HX	360	}
b5b7f088 HX	361
3c09f17c HX	362	static inline void aead_request_ctx(struct aead_request req)
	363	{
	364	return req->__ctx;
	365	}
	366
	367	static inline void aead_request_complete(struct aead_request *req, int err)
	368	{
	369	req->base.complete(&req->base, err);
	370	}
	371
	372	static inline u32 aead_request_flags(struct aead_request *req)
	373	{
	374	return req->base.flags;
	375	}
	376
	377	static inline struct crypto_alg crypto_get_attr_alg(struct rtattr *tb,
	378	u32 type, u32 mask)
	379	{
	380	return crypto_attr_alg(tb[1], type, mask);
	381	}
	382
378f4f51 HX	383	/*
	384	* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
	385	* Otherwise returns zero.
	386	*/
	387	static inline int crypto_requires_sync(u32 type, u32 mask)
	388	{
	389	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
	390	}
	391
6bf37e5a JY	392	noinline unsigned long __crypto_memneq(const void a, const void b, size_t size);
	393
	394	/**
	395	* crypto_memneq - Compare two areas of memory without leaking
	396	* timing information.
	397	*
	398	* @a: One area of memory
	399	* @b: Another area of memory
	400	* @size: The size of the area.
	401	*
	402	* Returns 0 when data is equal, 1 otherwise.
	403	*/
	404	static inline int crypto_memneq(const void a, const void b, size_t size)
	405	{
	406	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
	407	}
cce9e06d	408
6bf37e5a	409	#endif /* _CRYPTO_ALGAPI_H */