[GitHub/exynos8895/android_kernel_samsung_universal8895.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 "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 const struct crypto_type crypto_akcipher_type = {
	.extsize = crypto_alg_extsize,
	.init_tfm = crypto_akcipher_init_tfm,
#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),
};

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);

int crypto_register_akcipher(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;
	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);

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>
3c339ab8 TS	24	#include "internal.h"
	25
	26	#ifdef CONFIG_NET
	27	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	28	{
	29	struct crypto_report_akcipher rakcipher;
	30
	31	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	32
	33	if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
	34	sizeof(struct crypto_report_akcipher), &rakcipher))
	35	goto nla_put_failure;
	36	return 0;
	37
	38	nla_put_failure:
	39	return -EMSGSIZE;
	40	}
	41	#else
	42	static int crypto_akcipher_report(struct sk_buff skb, struct crypto_alg alg)
	43	{
	44	return -ENOSYS;
	45	}
	46	#endif
	47
	48	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	49	__attribute__ ((unused));
	50
	51	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	52	{
	53	seq_puts(m, "type : akcipher\n");
	54	}
	55
	56	static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
	57	{
	58	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	59	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	60
	61	alg->exit(akcipher);
	62	}
	63
	64	static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
	65	{
	66	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	67	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	68
	69	if (alg->exit)
	70	akcipher->base.exit = crypto_akcipher_exit_tfm;
	71
	72	if (alg->init)
	73	return alg->init(akcipher);
	74
	75	return 0;
	76	}
	77
	78	static const struct crypto_type crypto_akcipher_type = {
	79	.extsize = crypto_alg_extsize,
	80	.init_tfm = crypto_akcipher_init_tfm,
	81	#ifdef CONFIG_PROC_FS
	82	.show = crypto_akcipher_show,
	83	#endif
	84	.report = crypto_akcipher_report,
	85	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	86	.maskset = CRYPTO_ALG_TYPE_MASK,
	87	.type = CRYPTO_ALG_TYPE_AKCIPHER,
88	.tfmsize = offsetof(struct crypto_akcipher, base),
89	};
90
91	struct crypto_akcipher crypto_alloc_akcipher(const char alg_name, u32 type,
92	u32 mask)
93	{
94	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
95	}
96	EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
97
98	int crypto_register_akcipher(struct akcipher_alg *alg)
99	{
100	struct crypto_alg *base = &alg->base;
101
102	base->cra_type = &crypto_akcipher_type;
103	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
104	base->cra_flags \|= CRYPTO_ALG_TYPE_AKCIPHER;
105	return crypto_register_alg(base);
106	}
107	EXPORT_SYMBOL_GPL(crypto_register_akcipher);
108
109	void crypto_unregister_akcipher(struct akcipher_alg *alg)
110	{
111	crypto_unregister_alg(&alg->base);
112	}
113	EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
114
115	MODULE_LICENSE("GPL");
338a9de0	116	MODULE_DESCRIPTION("Generic public key cipher type");