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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Key-agreement Protocol Primitives (KPP)
- *
- * Copyright (c) 2016, Intel Corporation
- * Authors: Salvatore Benedetto <[email protected]>
- */
- #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 <linux/crypto.h>
- #include <crypto/algapi.h>
- #include <linux/cryptouser.h>
- #include <linux/compiler.h>
- #include <net/netlink.h>
- #include <crypto/kpp.h>
- #include <crypto/internal/kpp.h>
- #include "internal.h"
- #ifdef CONFIG_NET
- static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
- {
- struct crypto_report_kpp rkpp;
- memset(&rkpp, 0, sizeof(rkpp));
- strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
- return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
- }
- #else
- static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
- {
- return -ENOSYS;
- }
- #endif
- static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
- __maybe_unused;
- static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
- {
- seq_puts(m, "type : kpp\n");
- }
- static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
- {
- struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
- struct kpp_alg *alg = crypto_kpp_alg(kpp);
- alg->exit(kpp);
- }
- static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
- {
- struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
- struct kpp_alg *alg = crypto_kpp_alg(kpp);
- if (alg->exit)
- kpp->base.exit = crypto_kpp_exit_tfm;
- if (alg->init)
- return alg->init(kpp);
- return 0;
- }
- static void crypto_kpp_free_instance(struct crypto_instance *inst)
- {
- struct kpp_instance *kpp = kpp_instance(inst);
- kpp->free(kpp);
- }
- static const struct crypto_type crypto_kpp_type = {
- .extsize = crypto_alg_extsize,
- .init_tfm = crypto_kpp_init_tfm,
- .free = crypto_kpp_free_instance,
- #ifdef CONFIG_PROC_FS
- .show = crypto_kpp_show,
- #endif
- .report = crypto_kpp_report,
- .maskclear = ~CRYPTO_ALG_TYPE_MASK,
- .maskset = CRYPTO_ALG_TYPE_MASK,
- .type = CRYPTO_ALG_TYPE_KPP,
- .tfmsize = offsetof(struct crypto_kpp, base),
- };
- struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
- {
- return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
- }
- EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
- int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
- struct crypto_instance *inst,
- const char *name, u32 type, u32 mask)
- {
- spawn->base.frontend = &crypto_kpp_type;
- return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
- }
- EXPORT_SYMBOL_GPL(crypto_grab_kpp);
- int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
- {
- return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
- }
- EXPORT_SYMBOL_GPL(crypto_has_kpp);
- static void kpp_prepare_alg(struct kpp_alg *alg)
- {
- struct crypto_alg *base = &alg->base;
- base->cra_type = &crypto_kpp_type;
- base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
- base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
- }
- int crypto_register_kpp(struct kpp_alg *alg)
- {
- struct crypto_alg *base = &alg->base;
- kpp_prepare_alg(alg);
- return crypto_register_alg(base);
- }
- EXPORT_SYMBOL_GPL(crypto_register_kpp);
- void crypto_unregister_kpp(struct kpp_alg *alg)
- {
- crypto_unregister_alg(&alg->base);
- }
- EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
- int kpp_register_instance(struct crypto_template *tmpl,
- struct kpp_instance *inst)
- {
- if (WARN_ON(!inst->free))
- return -EINVAL;
- kpp_prepare_alg(&inst->alg);
- return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
- }
- EXPORT_SYMBOL_GPL(kpp_register_instance);
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
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