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/*
* 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 unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)
{
return alg->cra_ctxsize;
}
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));
NLA_PUT(skb, CRYPTOCFGA_REPORT_COMPRESS,
sizeof(struct crypto_report_comp), &rpcomp);
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_pcomp_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");
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