[linux-block.git] / crypto / akcipher.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Public Key Encryption
 *
 * Copyright (c) 2015, Intel Corporation
 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
 */
#include <crypto/internal/akcipher.h>
#include <linux/cryptouser.h>
#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 <net/netlink.h>

#include "internal.h"

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

	memset(&rakcipher, 0, sizeof(rakcipher));

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

	return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
		       sizeof(rakcipher), &rakcipher);
}

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 int __maybe_unused crypto_akcipher_report_stat(
	struct sk_buff *skb, struct crypto_alg *alg)
{
	struct akcipher_alg *akcipher = __crypto_akcipher_alg(alg);
	struct crypto_istat_akcipher *istat;
	struct crypto_stat_akcipher rakcipher;

	istat = akcipher_get_stat(akcipher);

	memset(&rakcipher, 0, sizeof(rakcipher));

	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	rakcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
	rakcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
	rakcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
	rakcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
	rakcipher.stat_sign_cnt = atomic64_read(&istat->sign_cnt);
	rakcipher.stat_verify_cnt = atomic64_read(&istat->verify_cnt);
	rakcipher.stat_err_cnt = atomic64_read(&istat->err_cnt);

	return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
		       sizeof(rakcipher), &rakcipher);
}

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
#if IS_ENABLED(CONFIG_CRYPTO_USER)
	.report = crypto_akcipher_report,
#endif
#ifdef CONFIG_CRYPTO_STATS
	.report_stat = crypto_akcipher_report_stat,
#endif
	.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,
			 struct crypto_instance *inst,
			 const char *name, u32 type, u32 mask)
{
	spawn->base.frontend = &crypto_akcipher_type;
	return crypto_grab_spawn(&spawn->base, inst, 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_istat_akcipher *istat = akcipher_get_stat(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;

	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
		memset(istat, 0, sizeof(*istat));
}

static int akcipher_default_op(struct akcipher_request *req)
{
	return -ENOSYS;
}

static int akcipher_default_set_key(struct crypto_akcipher *tfm,
				     const void *key, unsigned int keylen)
{
	return -ENOSYS;
}

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

	if (!alg->sign)
		alg->sign = akcipher_default_op;
	if (!alg->verify)
		alg->verify = akcipher_default_op;
	if (!alg->encrypt)
		alg->encrypt = akcipher_default_op;
	if (!alg->decrypt)
		alg->decrypt = akcipher_default_op;
	if (!alg->set_priv_key)
		alg->set_priv_key = akcipher_default_set_key;

	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)
{
	if (WARN_ON(!inst->free))
		return -EINVAL;
	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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
3c339ab8 TS	2	/*
	3	* Public Key Encryption
	4	*
	5	* Copyright (c) 2015, Intel Corporation
	6	* Authors: Tadeusz Struk <tadeusz.struk@intel.com>
3c339ab8	7	*/
035d78a1 HX	8	#include <crypto/internal/akcipher.h>
035d78a1 HX	9	#include <linux/cryptouser.h>
3c339ab8 TS	10	#include <linux/errno.h>
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/seq_file.h>
	14	#include <linux/slab.h>
	15	#include <linux/string.h>
3c339ab8	16	#include <net/netlink.h>
035d78a1	17
3c339ab8 TS	18	#include "internal.h"
3c339ab8 TS	19
c0f9e01d HX	20	static int __maybe_unused crypto_akcipher_report(
c0f9e01d HX	21	struct sk_buff skb, struct crypto_alg alg)
3c339ab8 TS	22	{
	23	struct crypto_report_akcipher rakcipher;
	24
37db69e0	25	memset(&rakcipher, 0, sizeof(rakcipher));
3c339ab8	26
37db69e0	27	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
3c339ab8	28
37db69e0 EB	29	return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
37db69e0 EB	30	sizeof(rakcipher), &rakcipher);
3c339ab8	31	}
3c339ab8 TS	32
3c339ab8 TS	33	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
d8c34b94	34	__maybe_unused;
3c339ab8 TS	35
	36	static void crypto_akcipher_show(struct seq_file m, struct crypto_alg alg)
	37	{
	38	seq_puts(m, "type : akcipher\n");
	39	}
	40
	41	static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
	42	{
	43	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	44	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	45
	46	alg->exit(akcipher);
	47	}
	48
	49	static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
	50	{
	51	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
	52	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
	53
	54	if (alg->exit)
	55	akcipher->base.exit = crypto_akcipher_exit_tfm;
	56
	57	if (alg->init)
	58	return alg->init(akcipher);
	59
	60	return 0;
	61	}
	62
28a4618a AZ	63	static void crypto_akcipher_free_instance(struct crypto_instance *inst)
	64	{
	65	struct akcipher_instance *akcipher = akcipher_instance(inst);
	66
	67	akcipher->free(akcipher);
	68	}
	69
035d78a1 HX	70	static int __maybe_unused crypto_akcipher_report_stat(
	71	struct sk_buff skb, struct crypto_alg alg)
	72	{
	73	struct akcipher_alg *akcipher = __crypto_akcipher_alg(alg);
	74	struct crypto_istat_akcipher *istat;
	75	struct crypto_stat_akcipher rakcipher;
	76
	77	istat = akcipher_get_stat(akcipher);
	78
	79	memset(&rakcipher, 0, sizeof(rakcipher));
	80
	81	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	82	rakcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
	83	rakcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
	84	rakcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
	85	rakcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
	86	rakcipher.stat_sign_cnt = atomic64_read(&istat->sign_cnt);
	87	rakcipher.stat_verify_cnt = atomic64_read(&istat->verify_cnt);
	88	rakcipher.stat_err_cnt = atomic64_read(&istat->err_cnt);
	89
	90	return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
	91	sizeof(rakcipher), &rakcipher);
	92	}
	93
3c339ab8 TS	94	static const struct crypto_type crypto_akcipher_type = {
	95	.extsize = crypto_alg_extsize,
	96	.init_tfm = crypto_akcipher_init_tfm,
28a4618a	97	.free = crypto_akcipher_free_instance,
3c339ab8 TS	98	#ifdef CONFIG_PROC_FS
	99	.show = crypto_akcipher_show,
	100	#endif
b8969a1b	101	#if IS_ENABLED(CONFIG_CRYPTO_USER)
3c339ab8	102	.report = crypto_akcipher_report,
c0f9e01d	103	#endif
035d78a1 HX	104	#ifdef CONFIG_CRYPTO_STATS
	105	.report_stat = crypto_akcipher_report_stat,
	106	#endif
3c339ab8 TS	107	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	108	.maskset = CRYPTO_ALG_TYPE_MASK,
	109	.type = CRYPTO_ALG_TYPE_AKCIPHER,
	110	.tfmsize = offsetof(struct crypto_akcipher, base),
	111	};
	112
73bed26f EB	113	int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
	114	struct crypto_instance *inst,
	115	const char *name, u32 type, u32 mask)
28a4618a AZ	116	{
28a4618a AZ	117	spawn->base.frontend = &crypto_akcipher_type;
de95c957	118	return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
28a4618a AZ	119	}
	120	EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
	121
3c339ab8 TS	122	struct crypto_akcipher crypto_alloc_akcipher(const char alg_name, u32 type,
	123	u32 mask)
	124	{
	125	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
	126	}
	127	EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
	128
28a4618a	129	static void akcipher_prepare_alg(struct akcipher_alg *alg)
3c339ab8	130	{
035d78a1	131	struct crypto_istat_akcipher *istat = akcipher_get_stat(alg);
3c339ab8 TS	132	struct crypto_alg *base = &alg->base;
	133
	134	base->cra_type = &crypto_akcipher_type;
	135	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	136	base->cra_flags \|= CRYPTO_ALG_TYPE_AKCIPHER;
035d78a1 HX	137
	138	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
	139	memset(istat, 0, sizeof(*istat));
28a4618a AZ	140	}
28a4618a AZ	141
78a0324f VC	142	static int akcipher_default_op(struct akcipher_request *req)
	143	{
	144	return -ENOSYS;
	145	}
	146
bc155c6c IK	147	static int akcipher_default_set_key(struct crypto_akcipher *tfm,
	148	const void *key, unsigned int keylen)
	149	{
	150	return -ENOSYS;
	151	}
	152
28a4618a AZ	153	int crypto_register_akcipher(struct akcipher_alg *alg)
	154	{
	155	struct crypto_alg *base = &alg->base;
	156
78a0324f VC	157	if (!alg->sign)
	158	alg->sign = akcipher_default_op;
	159	if (!alg->verify)
	160	alg->verify = akcipher_default_op;
	161	if (!alg->encrypt)
	162	alg->encrypt = akcipher_default_op;
	163	if (!alg->decrypt)
	164	alg->decrypt = akcipher_default_op;
bc155c6c IK	165	if (!alg->set_priv_key)
bc155c6c IK	166	alg->set_priv_key = akcipher_default_set_key;
78a0324f	167
28a4618a	168	akcipher_prepare_alg(alg);
3c339ab8 TS	169	return crypto_register_alg(base);
	170	}
	171	EXPORT_SYMBOL_GPL(crypto_register_akcipher);
	172
	173	void crypto_unregister_akcipher(struct akcipher_alg *alg)
	174	{
	175	crypto_unregister_alg(&alg->base);
	176	}
	177	EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
	178
28a4618a AZ	179	int akcipher_register_instance(struct crypto_template *tmpl,
	180	struct akcipher_instance *inst)
	181	{
d4fdc2df EB	182	if (WARN_ON(!inst->free))
d4fdc2df EB	183	return -EINVAL;
28a4618a AZ	184	akcipher_prepare_alg(&inst->alg);
	185	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
	186	}
	187	EXPORT_SYMBOL_GPL(akcipher_register_instance);
	188
3c339ab8	189	MODULE_LICENSE("GPL");
338a9de0	190	MODULE_DESCRIPTION("Generic public key cipher type");