/* * 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; snprintf(rpcomp.type, CRYPTO_MAX_ALG_NAME, "%s", "pcomp"); 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_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");