121 lines
3 KiB
C
121 lines
3 KiB
C
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/*
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* Cryptographic API.
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*
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* Partial (de)compression operations.
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*
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* Copyright 2008 Sony Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/crypto.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/string.h>
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#include <linux/cryptouser.h>
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#include <net/netlink.h>
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#include <crypto/compress.h>
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#include <crypto/internal/compress.h>
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#include "internal.h"
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static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
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{
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return 0;
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}
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static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)
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{
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return alg->cra_ctxsize;
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}
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static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
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{
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return 0;
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}
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#ifdef CONFIG_NET
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static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_report_comp rpcomp;
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strncpy(rpcomp.type, "pcomp", sizeof(rpcomp.type));
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if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
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sizeof(struct crypto_report_comp), &rpcomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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#else
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static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
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{
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return -ENOSYS;
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}
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#endif
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static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
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__attribute__ ((unused));
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static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
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{
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seq_printf(m, "type : pcomp\n");
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}
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static const struct crypto_type crypto_pcomp_type = {
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.extsize = crypto_pcomp_extsize,
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.init = crypto_pcomp_init,
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.init_tfm = crypto_pcomp_init_tfm,
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#ifdef CONFIG_PROC_FS
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.show = crypto_pcomp_show,
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#endif
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.report = crypto_pcomp_report,
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.maskclear = ~CRYPTO_ALG_TYPE_MASK,
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.maskset = CRYPTO_ALG_TYPE_MASK,
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.type = CRYPTO_ALG_TYPE_PCOMPRESS,
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.tfmsize = offsetof(struct crypto_pcomp, base),
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};
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struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
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u32 mask)
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{
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return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
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}
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EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
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int crypto_register_pcomp(struct pcomp_alg *alg)
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{
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struct crypto_alg *base = &alg->base;
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base->cra_type = &crypto_pcomp_type;
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base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
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base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
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return crypto_register_alg(base);
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}
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EXPORT_SYMBOL_GPL(crypto_register_pcomp);
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int crypto_unregister_pcomp(struct pcomp_alg *alg)
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{
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return crypto_unregister_alg(&alg->base);
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}
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EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Partial (de)compression type");
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MODULE_AUTHOR("Sony Corporation");
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