| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Key-agreement Protocol Primitives (KPP) |
| * |
| * Copyright (c) 2016, Intel Corporation |
| * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> |
| */ |
| #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 const struct crypto_type crypto_kpp_type = { |
| .extsize = crypto_alg_extsize, |
| .init_tfm = crypto_kpp_init_tfm, |
| #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); |
| |
| 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); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); |