[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>

struct module;
struct seq_file;

struct crypto_type {
	unsigned int (*ctxsize)(struct crypto_alg *alg);
	int (*init)(struct crypto_tfm *tfm);
	void (*exit)(struct crypto_tfm *tfm);
	void (*show)(struct seq_file *m, struct crypto_alg *alg);
};

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)(void *param, unsigned int len);
	void (*free)(struct crypto_instance *inst);

	char name[CRYPTO_MAX_ALG_NAME];
};

struct crypto_spawn {
	struct list_head list;
	struct crypto_alg *alg;
	struct crypto_instance *inst;
};

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

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_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
		      struct crypto_instance *inst);
void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn);

struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
				       u32 type, u32 mask);
struct crypto_instance *crypto_alloc_instance(const char *name,
					      struct crypto_alg *alg);

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

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

#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>
	16
4cc7720c	17	struct module;
e853c3cf HX	18	struct seq_file;
	19
	20	struct crypto_type {
	21	unsigned int (ctxsize)(struct crypto_alg alg);
	22	int (init)(struct crypto_tfm tfm);
	23	void (exit)(struct crypto_tfm tfm);
	24	void (show)(struct seq_file m, struct crypto_alg *alg);
	25	};
4cc7720c HX	26
	27	struct crypto_instance {
	28	struct crypto_alg alg;
	29
	30	struct crypto_template *tmpl;
	31	struct hlist_node list;
	32
	33	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	34	};
	35
	36	struct crypto_template {
	37	struct list_head list;
	38	struct hlist_head instances;
	39	struct module *module;
	40
	41	struct crypto_instance (alloc)(void *param, unsigned int len);
	42	void (free)(struct crypto_instance inst);
	43
	44	char name[CRYPTO_MAX_ALG_NAME];
	45	};
	46
6bfd4809 HX	47	struct crypto_spawn {
	48	struct list_head list;
	49	struct crypto_alg *alg;
	50	struct crypto_instance *inst;
	51	};
	52
5c64097a HX	53	struct scatter_walk {
	54	struct scatterlist *sg;
	55	unsigned int offset;
	56	};
	57
4cc7720c HX	58	int crypto_register_template(struct crypto_template *tmpl);
	59	void crypto_unregister_template(struct crypto_template *tmpl);
	60	struct crypto_template crypto_lookup_template(const char name);
	61
6bfd4809 HX	62	int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,
	63	struct crypto_instance *inst);
	64	void crypto_drop_spawn(struct crypto_spawn *spawn);
	65	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn);
	66
7fed0bf2 HX	67	struct crypto_alg crypto_get_attr_alg(void param, unsigned int len,
	68	u32 type, u32 mask);
	69	struct crypto_instance crypto_alloc_instance(const char name,
	70	struct crypto_alg *alg);
	71
4cc7720c HX	72	static inline void crypto_instance_ctx(struct crypto_instance inst)
	73	{
	74	return inst->__ctx;
	75	}
	76
f28776a3 HX	77	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	78	{
	79	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	80	}
	81
cce9e06d HX	82	#endif /* _CRYPTO_ALGAPI_H */
cce9e06d HX	83