[mirror_ubuntu-zesty-kernel.git] / crypto / akcipher.c

/*
 * Public Key Encryption
 *
 * Copyright (c) 2015, Intel Corporation
 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
 *
 * 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.
 *
 */
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>
#include <crypto/akcipher.h>
#include <crypto/internal/akcipher.h>
#include "internal.h"

#ifdef CONFIG_NET
static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_akcipher rakcipher;

	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));

	if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
		    sizeof(struct crypto_report_akcipher), &rakcipher))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}
#else
static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	return -ENOSYS;
}
#endif

static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
	__attribute__ ((unused));

static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
	seq_puts(m, "type         : akcipher\n");
}

static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
{
	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);

	alg->exit(akcipher);
}

static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);

	if (alg->exit)
		akcipher->base.exit = crypto_akcipher_exit_tfm;

	if (alg->init)
		return alg->init(akcipher);

	return 0;
}

static void crypto_akcipher_free_instance(struct crypto_instance *inst)
{
	struct akcipher_instance *akcipher = akcipher_instance(inst);

	akcipher->free(akcipher);
}

static const struct crypto_type crypto_akcipher_type = {
	.extsize = crypto_alg_extsize,
	.init_tfm = crypto_akcipher_init_tfm,
	.free = crypto_akcipher_free_instance,
#ifdef CONFIG_PROC_FS
	.show = crypto_akcipher_show,
#endif
	.report = crypto_akcipher_report,
	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	.maskset = CRYPTO_ALG_TYPE_MASK,
	.type = CRYPTO_ALG_TYPE_AKCIPHER,
	.tfmsize = offsetof(struct crypto_akcipher, base),
};

int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
			 u32 type, u32 mask)
{
	spawn->base.frontend = &crypto_akcipher_type;
	return crypto_grab_spawn(&spawn->base, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_akcipher);

struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
					      u32 mask)
{
	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);

static void akcipher_prepare_alg(struct akcipher_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	base->cra_type = &crypto_akcipher_type;
	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
}

int crypto_register_akcipher(struct akcipher_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	akcipher_prepare_alg(alg);
	return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_akcipher);

void crypto_unregister_akcipher(struct akcipher_alg *alg)
{
	crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);

int akcipher_register_instance(struct crypto_template *tmpl,
			       struct akcipher_instance *inst)
{
	akcipher_prepare_alg(&inst->alg);
	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
}
EXPORT_SYMBOL_GPL(akcipher_register_instance);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic public key cipher type");
Commit	Line	Data
3c339ab8 TS	1	/*
	2	* Public Key Encryption
	3	*
	4	* Copyright (c) 2015, Intel Corporation
	5	* Authors: Tadeusz Struk <tadeusz.struk@intel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the Free
	9	* Software Foundation; either version 2 of the License, or (at your option)
	10	* any later version.
	11	*
	12	*/
	13	#include <linux/errno.h>
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/seq_file.h>
	17	#include <linux/slab.h>
	18	#include <linux/string.h>
	19	#include <linux/crypto.h>
	20	#include <crypto/algapi.h>
	21	#include <linux/cryptouser.h>
	22	#include <net/netlink.h>
	23	#include <crypto/akcipher.h>
28a4618a	24	#include <crypto/internal/akcipher.h>
3c339ab8 TS	25	#include "internal.h"
	26
	27	#ifdef CONFIG_NET
	28	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	29	{
	30	struct crypto_report_akcipher rakcipher;
	31
	32	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	33
	34	if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
	35	sizeof(struct crypto_report_akcipher), &rakcipher))
	36	goto nla_put_failure;
	37	return 0;
	38
	39	nla_put_failure:
	40	return -EMSGSIZE;
	41	}
	42	#else
	43	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	44	{
	45	return -ENOSYS;
	46	}
	47	#endif
	48
	49	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	50	__attribute__ ((unused));
	51
	52	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	53	{
	54	seq_puts(m, "type : akcipher\n");
	55	}
	56
	57	static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
	58	{
	59	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	60	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	61
	62	alg->exit(akcipher);
	63	}
	64
	65	static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
	66	{
	67	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	68	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	69
	70	if (alg->exit)
	71	akcipher->base.exit = crypto_akcipher_exit_tfm;
	72
	73	if (alg->init)
	74	return alg->init(akcipher);
	75
	76	return 0;
	77	}
	78
28a4618a AZ	79	static void crypto_akcipher_free_instance(struct crypto_instance *inst)
	80	{
	81	struct akcipher_instance *akcipher = akcipher_instance(inst);
	82
	83	akcipher->free(akcipher);
	84	}
	85
3c339ab8 TS	86	static const struct crypto_type crypto_akcipher_type = {
	87	.extsize = crypto_alg_extsize,
	88	.init_tfm = crypto_akcipher_init_tfm,
28a4618a	89	.free = crypto_akcipher_free_instance,
3c339ab8 TS	90	#ifdef CONFIG_PROC_FS
	91	.show = crypto_akcipher_show,
	92	#endif
	93	.report = crypto_akcipher_report,
	94	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	95	.maskset = CRYPTO_ALG_TYPE_MASK,
	96	.type = CRYPTO_ALG_TYPE_AKCIPHER,
	97	.tfmsize = offsetof(struct crypto_akcipher, base),
	98	};
	99
28a4618a AZ	100	int crypto_grab_akcipher(struct crypto_akcipher_spawn spawn, const char name,
	101	u32 type, u32 mask)
	102	{
	103	spawn->base.frontend = &crypto_akcipher_type;
	104	return crypto_grab_spawn(&spawn->base, name, type, mask);
	105	}
	106	EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
	107
3c339ab8 TS	108	struct crypto_akcipher crypto_alloc_akcipher(const char alg_name, u32 type,
	109	u32 mask)
	110	{
	111	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
	112	}
	113	EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
	114
28a4618a	115	static void akcipher_prepare_alg(struct akcipher_alg *alg)
3c339ab8 TS	116	{
	117	struct crypto_alg *base = &alg->base;
	118
	119	base->cra_type = &crypto_akcipher_type;
	120	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	121	base->cra_flags \|= CRYPTO_ALG_TYPE_AKCIPHER;
28a4618a AZ	122	}
	123
	124	int crypto_register_akcipher(struct akcipher_alg *alg)
	125	{
	126	struct crypto_alg *base = &alg->base;
	127
	128	akcipher_prepare_alg(alg);
3c339ab8 TS	129	return crypto_register_alg(base);
	130	}
	131	EXPORT_SYMBOL_GPL(crypto_register_akcipher);
	132
	133	void crypto_unregister_akcipher(struct akcipher_alg *alg)
	134	{
	135	crypto_unregister_alg(&alg->base);
	136	}
	137	EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
	138
28a4618a AZ	139	int akcipher_register_instance(struct crypto_template *tmpl,
	140	struct akcipher_instance *inst)
	141	{
	142	akcipher_prepare_alg(&inst->alg);
	143	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
	144	}
	145	EXPORT_SYMBOL_GPL(akcipher_register_instance);
	146
3c339ab8	147	MODULE_LICENSE("GPL");
338a9de0	148	MODULE_DESCRIPTION("Generic public key cipher type");