[mirror_ubuntu-artful-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 <linux/compiler.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)
	__maybe_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>
d8c34b94	20	#include <linux/compiler.h>
3c339ab8 TS	21	#include <crypto/algapi.h>
	22	#include <linux/cryptouser.h>
	23	#include <net/netlink.h>
	24	#include <crypto/akcipher.h>
28a4618a	25	#include <crypto/internal/akcipher.h>
3c339ab8 TS	26	#include "internal.h"
	27
	28	#ifdef CONFIG_NET
	29	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	30	{
	31	struct crypto_report_akcipher rakcipher;
	32
	33	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	34
	35	if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
	36	sizeof(struct crypto_report_akcipher), &rakcipher))
	37	goto nla_put_failure;
	38	return 0;
	39
	40	nla_put_failure:
	41	return -EMSGSIZE;
	42	}
	43	#else
	44	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	45	{
	46	return -ENOSYS;
	47	}
	48	#endif
	49
	50	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
d8c34b94	51	__maybe_unused;
3c339ab8 TS	52
	53	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	54	{
	55	seq_puts(m, "type : akcipher\n");
	56	}
	57
	58	static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
	59	{
	60	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	61	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	62
	63	alg->exit(akcipher);
	64	}
	65
	66	static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
	67	{
	68	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	69	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	70
	71	if (alg->exit)
	72	akcipher->base.exit = crypto_akcipher_exit_tfm;
	73
	74	if (alg->init)
	75	return alg->init(akcipher);
	76
	77	return 0;
	78	}
	79
28a4618a AZ	80	static void crypto_akcipher_free_instance(struct crypto_instance *inst)
	81	{
	82	struct akcipher_instance *akcipher = akcipher_instance(inst);
	83
	84	akcipher->free(akcipher);
	85	}
	86
3c339ab8 TS	87	static const struct crypto_type crypto_akcipher_type = {
	88	.extsize = crypto_alg_extsize,
	89	.init_tfm = crypto_akcipher_init_tfm,
28a4618a	90	.free = crypto_akcipher_free_instance,
3c339ab8 TS	91	#ifdef CONFIG_PROC_FS
	92	.show = crypto_akcipher_show,
	93	#endif
	94	.report = crypto_akcipher_report,
	95	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	96	.maskset = CRYPTO_ALG_TYPE_MASK,
	97	.type = CRYPTO_ALG_TYPE_AKCIPHER,
	98	.tfmsize = offsetof(struct crypto_akcipher, base),
	99	};
	100
28a4618a AZ	101	int crypto_grab_akcipher(struct crypto_akcipher_spawn spawn, const char name,
	102	u32 type, u32 mask)
	103	{
	104	spawn->base.frontend = &crypto_akcipher_type;
	105	return crypto_grab_spawn(&spawn->base, name, type, mask);
	106	}
	107	EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
	108
3c339ab8 TS	109	struct crypto_akcipher crypto_alloc_akcipher(const char alg_name, u32 type,
	110	u32 mask)
	111	{
	112	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
	113	}
	114	EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
	115
28a4618a	116	static void akcipher_prepare_alg(struct akcipher_alg *alg)
3c339ab8 TS	117	{
	118	struct crypto_alg *base = &alg->base;
	119
	120	base->cra_type = &crypto_akcipher_type;
	121	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	122	base->cra_flags \|= CRYPTO_ALG_TYPE_AKCIPHER;
28a4618a AZ	123	}
	124
	125	int crypto_register_akcipher(struct akcipher_alg *alg)
	126	{
	127	struct crypto_alg *base = &alg->base;
	128
	129	akcipher_prepare_alg(alg);
3c339ab8 TS	130	return crypto_register_alg(base);
	131	}
	132	EXPORT_SYMBOL_GPL(crypto_register_akcipher);
	133
	134	void crypto_unregister_akcipher(struct akcipher_alg *alg)
	135	{
	136	crypto_unregister_alg(&alg->base);
	137	}
	138	EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
	139
28a4618a AZ	140	int akcipher_register_instance(struct crypto_template *tmpl,
	141	struct akcipher_instance *inst)
	142	{
	143	akcipher_prepare_alg(&inst->alg);
	144	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
	145	}
	146	EXPORT_SYMBOL_GPL(akcipher_register_instance);
	147
3c339ab8	148	MODULE_LICENSE("GPL");
338a9de0	149	MODULE_DESCRIPTION("Generic public key cipher type");