[mirror_ubuntu-jammy-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>

/*
 * Maximum values for blocksize and alignmask, used to allocate
 * static buffers that are big enough for any combination of
 * algs and architectures. Ciphers have a lower maximum size.
 */
#define MAX_ALGAPI_BLOCKSIZE		160
#define MAX_ALGAPI_ALIGNMASK		63
#define MAX_CIPHER_BLOCKSIZE		16
#define MAX_CIPHER_ALIGNMASK		15

struct crypto_aead;
struct crypto_instance;
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);
	void (*free)(struct crypto_instance *inst);

	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);
int crypto_register_templates(struct crypto_template *tmpls, int count);
void crypto_unregister_template(struct crypto_template *tmpl);
void crypto_unregister_templates(struct crypto_template *tmpls, int count);
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);
int crypto_inst_setname(struct crypto_instance *inst, const char *name,
			struct crypto_alg *alg);
void *crypto_alloc_instance(const char *name, struct crypto_alg *alg,
			    unsigned int head);

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);
static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
{
	return queue->qlen;
}

void crypto_inc(u8 *a, unsigned int size);
void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);

static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
{
	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
	    __builtin_constant_p(size) &&
	    (size % sizeof(unsigned long)) == 0) {
		unsigned long *d = (unsigned long *)dst;
		unsigned long *s = (unsigned long *)src;

		while (size > 0) {
			*d++ ^= *s++;
			size -= sizeof(unsigned long);
		}
	} else {
		__crypto_xor(dst, dst, src, size);
	}
}

static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
				  unsigned int size)
{
	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
	    __builtin_constant_p(size) &&
	    (size % sizeof(unsigned long)) == 0) {
		unsigned long *d = (unsigned long *)dst;
		unsigned long *s1 = (unsigned long *)src1;
		unsigned long *s2 = (unsigned long *)src2;

		while (size > 0) {
			*d++ = *s1++ ^ *s2++;
			size -= sizeof(unsigned long);
		}
	} else {
		__crypto_xor(dst, src1, src2, 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 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);
}

static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
{
	return (type ^ off) & mask & off;
}

/*
 * 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 crypto_requires_off(type, 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 !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
		cond_resched();
#endif
}

int crypto_register_notifier(struct notifier_block *nb);
int crypto_unregister_notifier(struct notifier_block *nb);

/* Crypto notification events. */
enum {
	CRYPTO_MSG_ALG_REQUEST,
	CRYPTO_MSG_ALG_REGISTER,
	CRYPTO_MSG_ALG_LOADED,
};

#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
13c935bb SM	20	/*
	21	* Maximum values for blocksize and alignmask, used to allocate
	22	* static buffers that are big enough for any combination of
a9f7f88a	23	* algs and architectures. Ciphers have a lower maximum size.
13c935bb	24	*/
a9f7f88a KC	25	#define MAX_ALGAPI_BLOCKSIZE 160
a9f7f88a KC	26	#define MAX_ALGAPI_ALIGNMASK 63
13c935bb SM	27	#define MAX_CIPHER_BLOCKSIZE 16
	28	#define MAX_CIPHER_ALIGNMASK 15
	29
5d1d65f8	30	struct crypto_aead;
319382a6	31	struct crypto_instance;
4cc7720c	32	struct module;
ebc610e5	33	struct rtattr;
e853c3cf HX	34	struct seq_file;
	35
	36	struct crypto_type {
27d2a330	37	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
2ca33da1	38	unsigned int (extsize)(struct crypto_alg alg);
27d2a330	39	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
2ca33da1	40	int (init_tfm)(struct crypto_tfm tfm);
e853c3cf	41	void (show)(struct seq_file m, struct crypto_alg *alg);
b6aa63c0	42	int (report)(struct sk_buff skb, struct crypto_alg *alg);
319382a6	43	void (free)(struct crypto_instance inst);
7b0bac64 HX	44
	45	unsigned int type;
	46	unsigned int maskclear;
	47	unsigned int maskset;
	48	unsigned int tfmsize;
e853c3cf	49	};
4cc7720c HX	50
	51	struct crypto_instance {
	52	struct crypto_alg alg;
	53
	54	struct crypto_template *tmpl;
	55	struct hlist_node list;
	56
	57	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	58	};
	59
	60	struct crypto_template {
	61	struct list_head list;
	62	struct hlist_head instances;
	63	struct module *module;
	64
ebc610e5	65	struct crypto_instance (alloc)(struct rtattr **tb);
4cc7720c	66	void (free)(struct crypto_instance inst);
f2ac72e8	67	int (create)(struct crypto_template tmpl, struct rtattr **tb);
4cc7720c HX	68
	69	char name[CRYPTO_MAX_ALG_NAME];
	70	};
	71
6bfd4809 HX	72	struct crypto_spawn {
	73	struct list_head list;
	74	struct crypto_alg *alg;
	75	struct crypto_instance *inst;
97eedce1	76	const struct crypto_type *frontend;
a73e6996	77	u32 mask;
6bfd4809 HX	78	};
6bfd4809 HX	79
b5b7f088 HX	80	struct crypto_queue {
	81	struct list_head list;
	82	struct list_head *backlog;
	83
	84	unsigned int qlen;
	85	unsigned int max_qlen;
	86	};
	87
5c64097a HX	88	struct scatter_walk {
	89	struct scatterlist *sg;
	90	unsigned int offset;
	91	};
	92
5cde0af2 HX	93	struct blkcipher_walk {
	94	union {
	95	struct {
	96	struct page *page;
	97	unsigned long offset;
	98	} phys;
	99
	100	struct {
	101	u8 *page;
	102	u8 *addr;
	103	} virt;
	104	} src, dst;
	105
	106	struct scatter_walk in;
	107	unsigned int nbytes;
	108
	109	struct scatter_walk out;
	110	unsigned int total;
	111
	112	void *page;
	113	u8 *buffer;
	114	u8 *iv;
822be00f	115	unsigned int ivsize;
5cde0af2 HX	116
5cde0af2 HX	117	int flags;
822be00f AB	118	unsigned int walk_blocksize;
	119	unsigned int cipher_blocksize;
	120	unsigned int alignmask;
5cde0af2 HX	121	};
5cde0af2 HX	122
bf06099d DM	123	struct ablkcipher_walk {
	124	struct {
	125	struct page *page;
	126	unsigned int offset;
	127	} src, dst;
	128
	129	struct scatter_walk in;
	130	unsigned int nbytes;
	131	struct scatter_walk out;
	132	unsigned int total;
	133	struct list_head buffers;
	134	u8 *iv_buffer;
	135	u8 *iv;
	136	int flags;
	137	unsigned int blocksize;
	138	};
	139
b5b7f088	140	extern const struct crypto_type crypto_ablkcipher_type;
5cde0af2 HX	141	extern const struct crypto_type crypto_blkcipher_type;
5cde0af2 HX	142
db131ef9 HX	143	void crypto_mod_put(struct crypto_alg *alg);
db131ef9 HX	144
4cc7720c	145	int crypto_register_template(struct crypto_template *tmpl);
9572442d	146	int crypto_register_templates(struct crypto_template *tmpls, int count);
4cc7720c	147	void crypto_unregister_template(struct crypto_template *tmpl);
9572442d	148	void crypto_unregister_templates(struct crypto_template *tmpls, int count);
4cc7720c HX	149	struct crypto_template crypto_lookup_template(const char name);
4cc7720c HX	150
9cd899a3 HX	151	int crypto_register_instance(struct crypto_template *tmpl,
9cd899a3 HX	152	struct crypto_instance *inst);
87b16756	153	int crypto_unregister_instance(struct crypto_instance *inst);
9cd899a3	154
6bfd4809	155	int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,
a73e6996	156	struct crypto_instance *inst, u32 mask);
97eedce1 HX	157	int crypto_init_spawn2(struct crypto_spawn spawn, struct crypto_alg alg,
	158	struct crypto_instance *inst,
	159	const struct crypto_type *frontend);
d6ef2f19 HX	160	int crypto_grab_spawn(struct crypto_spawn spawn, const char name,
d6ef2f19 HX	161	u32 type, u32 mask);
97eedce1	162
6bfd4809	163	void crypto_drop_spawn(struct crypto_spawn *spawn);
2e306ee0 HX	164	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
2e306ee0 HX	165	u32 mask);
97eedce1	166	void crypto_spawn_tfm2(struct crypto_spawn spawn);
6bfd4809	167
378f4f51 HX	168	static inline void crypto_set_spawn(struct crypto_spawn *spawn,
	169	struct crypto_instance *inst)
	170	{
	171	spawn->inst = inst;
	172	}
	173
ebc610e5 HX	174	struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb);
ebc610e5 HX	175	int crypto_check_attr_type(struct rtattr **tb, u32 type);
68b6c7d6	176	const char crypto_attr_alg_name(struct rtattr rta);
d06854f0 HX	177	struct crypto_alg crypto_attr_alg2(struct rtattr rta,
	178	const struct crypto_type *frontend,
	179	u32 type, u32 mask);
	180
	181	static inline struct crypto_alg crypto_attr_alg(struct rtattr rta,
	182	u32 type, u32 mask)
	183	{
	184	return crypto_attr_alg2(rta, NULL, type, mask);
	185	}
	186
3c09f17c	187	int crypto_attr_u32(struct rtattr rta, u32 num);
32f27c74 HX	188	int crypto_inst_setname(struct crypto_instance inst, const char name,
32f27c74 HX	189	struct crypto_alg *alg);
14aa1a83 EB	190	void crypto_alloc_instance(const char name, struct crypto_alg *alg,
14aa1a83 EB	191	unsigned int head);
7fed0bf2	192
b5b7f088 HX	193	void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
	194	int crypto_enqueue_request(struct crypto_queue *queue,
	195	struct crypto_async_request *request);
	196	struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue);
	197	int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm);
9f93a8a0 BW	198	static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
	199	{
	200	return queue->qlen;
	201	}
b5b7f088	202
7613636d	203	void crypto_inc(u8 *a, unsigned int size);
a7c391f0	204	void __crypto_xor(u8 dst, const u8 src1, const u8 *src2, unsigned int size);
db91af0f AB	205
	206	static inline void crypto_xor(u8 dst, const u8 src, unsigned int size)
	207	{
	208	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
	209	__builtin_constant_p(size) &&
	210	(size % sizeof(unsigned long)) == 0) {
	211	unsigned long d = (unsigned long )dst;
	212	unsigned long s = (unsigned long )src;
	213
	214	while (size > 0) {
	215	d++ ^= s++;
	216	size -= sizeof(unsigned long);
	217	}
	218	} else {
a7c391f0	219	__crypto_xor(dst, dst, src, size);
db91af0f AB	220	}
db91af0f AB	221	}
7613636d	222
45fe93df AB	223	static inline void crypto_xor_cpy(u8 dst, const u8 src1, const u8 *src2,
	224	unsigned int size)
	225	{
	226	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
	227	__builtin_constant_p(size) &&
	228	(size % sizeof(unsigned long)) == 0) {
	229	unsigned long d = (unsigned long )dst;
	230	unsigned long s1 = (unsigned long )src1;
	231	unsigned long s2 = (unsigned long )src2;
	232
	233	while (size > 0) {
	234	d++ = s1++ ^ *s2++;
	235	size -= sizeof(unsigned long);
	236	}
	237	} else {
	238	__crypto_xor(dst, src1, src2, size);
	239	}
	240	}
	241
5cde0af2 HX	242	int blkcipher_walk_done(struct blkcipher_desc *desc,
	243	struct blkcipher_walk *walk, int err);
	244	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	245	struct blkcipher_walk *walk);
	246	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	247	struct blkcipher_walk *walk);
7607bd8f HX	248	int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
	249	struct blkcipher_walk *walk,
	250	unsigned int blocksize);
4f7f1d7c AB	251	int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
	252	struct blkcipher_walk *walk,
	253	struct crypto_aead *tfm,
	254	unsigned int blocksize);
5cde0af2	255
bf06099d DM	256	int ablkcipher_walk_done(struct ablkcipher_request *req,
	257	struct ablkcipher_walk *walk, int err);
	258	int ablkcipher_walk_phys(struct ablkcipher_request *req,
	259	struct ablkcipher_walk *walk);
	260	void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
	261
5cde0af2 HX	262	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
5cde0af2 HX	263	{
ab300465 HX	264	return PTR_ALIGN(crypto_tfm_ctx(tfm),
ab300465 HX	265	crypto_tfm_alg_alignmask(tfm) + 1);
5cde0af2 HX	266	}
5cde0af2 HX	267
124b53d0 HX	268	static inline struct crypto_instance *crypto_tfm_alg_instance(
	269	struct crypto_tfm *tfm)
	270	{
	271	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
	272	}
	273
4cc7720c HX	274	static inline void crypto_instance_ctx(struct crypto_instance inst)
	275	{
	276	return inst->__ctx;
	277	}
	278
b5b7f088 HX	279	static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	280	struct crypto_ablkcipher *tfm)
	281	{
	282	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
	283	}
	284
	285	static inline void crypto_ablkcipher_ctx(struct crypto_ablkcipher tfm)
	286	{
	287	return crypto_tfm_ctx(&tfm->base);
	288	}
	289
aa379a6a SS	290	static inline void crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher tfm)
	291	{
	292	return crypto_tfm_ctx_aligned(&tfm->base);
	293	}
	294
124b53d0 HX	295	static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	296	struct crypto_spawn *spawn)
	297	{
	298	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
332f8840	299	u32 mask = CRYPTO_ALG_TYPE_MASK;
124b53d0 HX	300
	301	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
	302	}
	303
5cde0af2 HX	304	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	305	{
	306	return crypto_tfm_ctx(&tfm->base);
	307	}
	308
	309	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	310	{
	311	return crypto_tfm_ctx_aligned(&tfm->base);
	312	}
	313
2e306ee0 HX	314	static inline struct crypto_cipher *crypto_spawn_cipher(
	315	struct crypto_spawn *spawn)
	316	{
	317	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	318	u32 mask = CRYPTO_ALG_TYPE_MASK;
	319
	320	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	321	}
	322
f28776a3 HX	323	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	324	{
	325	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	326	}
	327
5cde0af2 HX	328	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	329	struct scatterlist *dst,
	330	struct scatterlist *src,
	331	unsigned int nbytes)
	332	{
	333	walk->in.sg = src;
	334	walk->out.sg = dst;
	335	walk->total = nbytes;
	336	}
	337
bf06099d DM	338	static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
	339	struct scatterlist *dst,
	340	struct scatterlist *src,
	341	unsigned int nbytes)
	342	{
	343	walk->in.sg = src;
	344	walk->out.sg = dst;
	345	walk->total = nbytes;
	346	INIT_LIST_HEAD(&walk->buffers);
	347	}
	348
	349	static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
	350	{
	351	if (unlikely(!list_empty(&walk->buffers)))
	352	__ablkcipher_walk_complete(walk);
	353	}
	354
b5b7f088 HX	355	static inline struct crypto_async_request *crypto_get_backlog(
	356	struct crypto_queue *queue)
	357	{
	358	return queue->backlog == &queue->list ? NULL :
	359	container_of(queue->backlog, struct crypto_async_request, list);
	360	}
	361
2de98e75	362	static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
b5b7f088 HX	363	struct ablkcipher_request *request)
b5b7f088 HX	364	{
2de98e75	365	return crypto_enqueue_request(queue, &request->base);
b5b7f088 HX	366	}
	367
	368	static inline struct ablkcipher_request *ablkcipher_dequeue_request(
2de98e75	369	struct crypto_queue *queue)
b5b7f088	370	{
2de98e75	371	return ablkcipher_request_cast(crypto_dequeue_request(queue));
b5b7f088 HX	372	}
	373
	374	static inline void ablkcipher_request_ctx(struct ablkcipher_request req)
	375	{
	376	return req->__ctx;
	377	}
	378
2de98e75 HX	379	static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
2de98e75 HX	380	struct crypto_ablkcipher *tfm)
b5b7f088	381	{
2de98e75	382	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
b5b7f088 HX	383	}
b5b7f088 HX	384
3c09f17c HX	385	static inline struct crypto_alg crypto_get_attr_alg(struct rtattr *tb,
	386	u32 type, u32 mask)
	387	{
	388	return crypto_attr_alg(tb[1], type, mask);
	389	}
	390
016df0ab HX	391	static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
	392	{
	393	return (type ^ off) & mask & off;
	394	}
	395
378f4f51 HX	396	/*
	397	* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
	398	* Otherwise returns zero.
	399	*/
	400	static inline int crypto_requires_sync(u32 type, u32 mask)
	401	{
016df0ab	402	return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
378f4f51 HX	403	}
378f4f51 HX	404
6bf37e5a JY	405	noinline unsigned long __crypto_memneq(const void a, const void b, size_t size);
	406
	407	/**
	408	* crypto_memneq - Compare two areas of memory without leaking
	409	* timing information.
	410	*
	411	* @a: One area of memory
	412	* @b: Another area of memory
	413	* @size: The size of the area.
	414	*
	415	* Returns 0 when data is equal, 1 otherwise.
	416	*/
	417	static inline int crypto_memneq(const void a, const void b, size_t size)
	418	{
	419	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
	420	}
cce9e06d	421
bb55a4c1 MV	422	static inline void crypto_yield(u32 flags)
bb55a4c1 MV	423	{
41401397	424	#if !defined(CONFIG_PREEMPT) \|\| defined(CONFIG_PREEMPT_VOLUNTARY)
bb55a4c1 MV	425	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
bb55a4c1 MV	426	cond_resched();
41401397	427	#endif
bb55a4c1 MV	428	}
bb55a4c1 MV	429
dd8b083f MP	430	int crypto_register_notifier(struct notifier_block *nb);
	431	int crypto_unregister_notifier(struct notifier_block *nb);
	432
	433	/* Crypto notification events. */
	434	enum {
	435	CRYPTO_MSG_ALG_REQUEST,
	436	CRYPTO_MSG_ALG_REGISTER,
	437	CRYPTO_MSG_ALG_LOADED,
	438	};
	439
6bf37e5a	440	#endif /* _CRYPTO_ALGAPI_H */