[linux.git] / crypto / kpp.c

/*
 * Key-agreement Protocol Primitives (KPP)
 *
 * Copyright (c) 2016, Intel Corporation
 * Authors: Salvatore Benedetto <[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.
 *
 */
#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 <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/kpp.h>
#include <crypto/internal/kpp.h>
#include "internal.h"

#ifdef CONFIG_NET
static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_kpp rkpp;

	strncpy(rkpp.type, "kpp", sizeof(rkpp.type));

	if (nla_put(skb, CRYPTOCFGA_REPORT_KPP,
		    sizeof(struct crypto_report_kpp), &rkpp))
		goto nla_put_failure;
	return 0;

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

static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
	__maybe_unused;

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

static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
{
	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
	struct kpp_alg *alg = crypto_kpp_alg(kpp);

	alg->exit(kpp);
}

static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
	struct kpp_alg *alg = crypto_kpp_alg(kpp);

	if (alg->exit)
		kpp->base.exit = crypto_kpp_exit_tfm;

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

	return 0;
}

static const struct crypto_type crypto_kpp_type = {
	.extsize = crypto_alg_extsize,
	.init_tfm = crypto_kpp_init_tfm,
#ifdef CONFIG_PROC_FS
	.show = crypto_kpp_show,
#endif
	.report = crypto_kpp_report,
	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	.maskset = CRYPTO_ALG_TYPE_MASK,
	.type = CRYPTO_ALG_TYPE_KPP,
	.tfmsize = offsetof(struct crypto_kpp, base),
};

struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
{
	return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_kpp);

static void kpp_prepare_alg(struct kpp_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	base->cra_type = &crypto_kpp_type;
	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
}

int crypto_register_kpp(struct kpp_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	kpp_prepare_alg(alg);
	return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_kpp);

void crypto_unregister_kpp(struct kpp_alg *alg)
{
	crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_kpp);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
Commit	Line	Data
4e5f2c40 SB	1	/*
	2	* Key-agreement Protocol Primitives (KPP)
	3	*
	4	* Copyright (c) 2016, Intel Corporation
	5	* Authors: Salvatore Benedetto <[email protected]>
	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>
d8c34b94	22	#include <linux/compiler.h>
4e5f2c40 SB	23	#include <net/netlink.h>
	24	#include <crypto/kpp.h>
	25	#include <crypto/internal/kpp.h>
	26	#include "internal.h"
	27
	28	#ifdef CONFIG_NET
	29	static int crypto_kpp_report(struct sk_buff skb, struct crypto_alg alg)
	30	{
	31	struct crypto_report_kpp rkpp;
	32
	33	strncpy(rkpp.type, "kpp", sizeof(rkpp.type));
	34
	35	if (nla_put(skb, CRYPTOCFGA_REPORT_KPP,
	36	sizeof(struct crypto_report_kpp), &rkpp))
	37	goto nla_put_failure;
	38	return 0;
	39
	40	nla_put_failure:
	41	return -EMSGSIZE;
	42	}
	43	#else
	44	static int crypto_kpp_report(struct sk_buff skb, struct crypto_alg alg)
	45	{
	46	return -ENOSYS;
	47	}
	48	#endif
	49
	50	static void crypto_kpp_show(struct seq_file m, struct crypto_alg alg)
d8c34b94	51	__maybe_unused;
4e5f2c40 SB	52
	53	static void crypto_kpp_show(struct seq_file m, struct crypto_alg alg)
	54	{
	55	seq_puts(m, "type : kpp\n");
	56	}
	57
	58	static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
	59	{
	60	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
	61	struct kpp_alg *alg = crypto_kpp_alg(kpp);
	62
	63	alg->exit(kpp);
	64	}
	65
	66	static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
	67	{
	68	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
	69	struct kpp_alg *alg = crypto_kpp_alg(kpp);
	70
	71	if (alg->exit)
	72	kpp->base.exit = crypto_kpp_exit_tfm;
	73
	74	if (alg->init)
	75	return alg->init(kpp);
	76
	77	return 0;
	78	}
	79
	80	static const struct crypto_type crypto_kpp_type = {
	81	.extsize = crypto_alg_extsize,
	82	.init_tfm = crypto_kpp_init_tfm,
	83	#ifdef CONFIG_PROC_FS
	84	.show = crypto_kpp_show,
	85	#endif
	86	.report = crypto_kpp_report,
	87	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	88	.maskset = CRYPTO_ALG_TYPE_MASK,
	89	.type = CRYPTO_ALG_TYPE_KPP,
	90	.tfmsize = offsetof(struct crypto_kpp, base),
	91	};
	92
	93	struct crypto_kpp crypto_alloc_kpp(const char alg_name, u32 type, u32 mask)
	94	{
	95	return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
	96	}
	97	EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
	98
	99	static void kpp_prepare_alg(struct kpp_alg *alg)
	100	{
	101	struct crypto_alg *base = &alg->base;
	102
	103	base->cra_type = &crypto_kpp_type;
	104	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	105	base->cra_flags \|= CRYPTO_ALG_TYPE_KPP;
	106	}
	107
	108	int crypto_register_kpp(struct kpp_alg *alg)
	109	{
	110	struct crypto_alg *base = &alg->base;
	111
	112	kpp_prepare_alg(alg);
	113	return crypto_register_alg(base);
	114	}
	115	EXPORT_SYMBOL_GPL(crypto_register_kpp);
116
117	void crypto_unregister_kpp(struct kpp_alg *alg)
118	{
119	crypto_unregister_alg(&alg->base);
120	}
121	EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
122
123	MODULE_LICENSE("GPL");
124	MODULE_DESCRIPTION("Key-agreement Protocol Primitives");