[linux-2.6-block.git] / crypto / pcompress.c

/*
 * Cryptographic API.
 *
 * Partial (de)compression operations.
 *
 * Copyright 2008 Sony Corporation
 *
 * 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; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/crypto.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>

#include <crypto/compress.h>
#include <crypto/internal/compress.h>

#include "internal.h"


static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
{
	return 0;
}

static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
{
	return 0;
}

#ifdef CONFIG_NET
static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_comp rpcomp;

	strncpy(rpcomp.type, "pcomp", sizeof(rpcomp.type));
	if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
		    sizeof(struct crypto_report_comp), &rpcomp))
		goto nla_put_failure;
	return 0;

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

static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
	__attribute__ ((unused));
static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
{
	seq_printf(m, "type         : pcomp\n");
}

static const struct crypto_type crypto_pcomp_type = {
	.extsize	= crypto_alg_extsize,
	.init		= crypto_pcomp_init,
	.init_tfm	= crypto_pcomp_init_tfm,
#ifdef CONFIG_PROC_FS
	.show		= crypto_pcomp_show,
#endif
	.report		= crypto_pcomp_report,
	.maskclear	= ~CRYPTO_ALG_TYPE_MASK,
	.maskset	= CRYPTO_ALG_TYPE_MASK,
	.type		= CRYPTO_ALG_TYPE_PCOMPRESS,
	.tfmsize	= offsetof(struct crypto_pcomp, base),
};

struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
					u32 mask)
{
	return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);

int crypto_register_pcomp(struct pcomp_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	base->cra_type = &crypto_pcomp_type;
	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;

	return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_pcomp);

int crypto_unregister_pcomp(struct pcomp_alg *alg)
{
	return crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Partial (de)compression type");
MODULE_AUTHOR("Sony Corporation");
Commit	Line	Data
a1d2f095 GU	1	/*
	2	* Cryptographic API.
	3	*
	4	* Partial (de)compression operations.
	5	*
	6	* Copyright 2008 Sony Corporation
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; version 2 of the License.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program.
	19	* If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	#include <linux/crypto.h>
	23	#include <linux/errno.h>
	24	#include <linux/module.h>
	25	#include <linux/seq_file.h>
	26	#include <linux/string.h>
a55465dc SK	27	#include <linux/cryptouser.h>
a55465dc SK	28	#include <net/netlink.h>
a1d2f095 GU	29
a1d2f095 GU	30	#include <crypto/compress.h>
2f6ceb79	31	#include <crypto/internal/compress.h>
a1d2f095 GU	32
	33	#include "internal.h"
	34
	35
	36	static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
	37	{
	38	return 0;
	39	}
	40
2ca33da1	41	static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
a1d2f095 GU	42	{
	43	return 0;
	44	}
	45
3acc8473	46	#ifdef CONFIG_NET
a55465dc SK	47	static int crypto_pcomp_report(struct sk_buff skb, struct crypto_alg alg)
	48	{
	49	struct crypto_report_comp rpcomp;
	50
9a5467bf	51	strncpy(rpcomp.type, "pcomp", sizeof(rpcomp.type));
6662df33 DM	52	if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
	53	sizeof(struct crypto_report_comp), &rpcomp))
	54	goto nla_put_failure;
a55465dc SK	55	return 0;
	56
	57	nla_put_failure:
	58	return -EMSGSIZE;
	59	}
3acc8473 HX	60	#else
	61	static int crypto_pcomp_report(struct sk_buff skb, struct crypto_alg alg)
	62	{
	63	return -ENOSYS;
	64	}
	65	#endif
a55465dc	66
a1d2f095 GU	67	static void crypto_pcomp_show(struct seq_file m, struct crypto_alg alg)
	68	__attribute__ ((unused));
	69	static void crypto_pcomp_show(struct seq_file m, struct crypto_alg alg)
	70	{
	71	seq_printf(m, "type : pcomp\n");
	72	}
	73
	74	static const struct crypto_type crypto_pcomp_type = {
f7c9bebe	75	.extsize = crypto_alg_extsize,
a1d2f095 GU	76	.init = crypto_pcomp_init,
	77	.init_tfm = crypto_pcomp_init_tfm,
	78	#ifdef CONFIG_PROC_FS
	79	.show = crypto_pcomp_show,
	80	#endif
a55465dc	81	.report = crypto_pcomp_report,
a1d2f095 GU	82	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	83	.maskset = CRYPTO_ALG_TYPE_MASK,
	84	.type = CRYPTO_ALG_TYPE_PCOMPRESS,
	85	.tfmsize = offsetof(struct crypto_pcomp, base),
	86	};
	87
	88	struct crypto_pcomp crypto_alloc_pcomp(const char alg_name, u32 type,
	89	u32 mask)
	90	{
	91	return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
	92	}
	93	EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
	94
	95	int crypto_register_pcomp(struct pcomp_alg *alg)
	96	{
	97	struct crypto_alg *base = &alg->base;
	98
	99	base->cra_type = &crypto_pcomp_type;
	100	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	101	base->cra_flags \|= CRYPTO_ALG_TYPE_PCOMPRESS;
	102
	103	return crypto_register_alg(base);
	104	}
	105	EXPORT_SYMBOL_GPL(crypto_register_pcomp);
	106
	107	int crypto_unregister_pcomp(struct pcomp_alg *alg)
	108	{
	109	return crypto_unregister_alg(&alg->base);
	110	}
	111	EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
	112
	113	MODULE_LICENSE("GPL");
	114	MODULE_DESCRIPTION("Partial (de)compression type");
	115	MODULE_AUTHOR("Sony Corporation");