| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Key-agreement Protocol Primitives (KPP) |
| 3 | * |
| 4 | * Copyright (c) 2016, Intel Corporation |
| 5 | * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the Free |
| 9 | * Software Foundation; either version 2 of the License, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | */ |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/seq_file.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/crypto.h> |
| 20 | #include <crypto/algapi.h> |
| 21 | #include <linux/cryptouser.h> |
| 22 | #include <linux/compiler.h> |
| 23 | #include <net/netlink.h> |
| 24 | #include <crypto/kpp.h> |
| 25 | #include <crypto/internal/kpp.h> |
| 26 | #include "internal.h" |
| 27 | |
| 28 | #ifdef CONFIG_NET |
| 29 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 30 | { |
| 31 | struct crypto_report_kpp rkpp; |
| 32 | |
| 33 | strncpy(rkpp.type, "kpp", sizeof(rkpp.type)); |
| 34 | |
| 35 | if (nla_put(skb, CRYPTOCFGA_REPORT_KPP, |
| 36 | sizeof(struct crypto_report_kpp), &rkpp)) |
| 37 | goto nla_put_failure; |
| 38 | return 0; |
| 39 | |
| 40 | nla_put_failure: |
| 41 | return -EMSGSIZE; |
| 42 | } |
| 43 | #else |
| 44 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 45 | { |
| 46 | return -ENOSYS; |
| 47 | } |
| 48 | #endif |
| 49 | |
| 50 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
| 51 | __maybe_unused; |
| 52 | |
| 53 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
| 54 | { |
| 55 | seq_puts(m, "type : kpp\n"); |
| 56 | } |
| 57 | |
| 58 | static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) |
| 59 | { |
| 60 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
| 61 | struct kpp_alg *alg = crypto_kpp_alg(kpp); |
| 62 | |
| 63 | alg->exit(kpp); |
| 64 | } |
| 65 | |
| 66 | static int crypto_kpp_init_tfm(struct crypto_tfm *tfm) |
| 67 | { |
| 68 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
| 69 | struct kpp_alg *alg = crypto_kpp_alg(kpp); |
| 70 | |
| 71 | if (alg->exit) |
| 72 | kpp->base.exit = crypto_kpp_exit_tfm; |
| 73 | |
| 74 | if (alg->init) |
| 75 | return alg->init(kpp); |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static const struct crypto_type crypto_kpp_type = { |
| 81 | .extsize = crypto_alg_extsize, |
| 82 | .init_tfm = crypto_kpp_init_tfm, |
| 83 | #ifdef CONFIG_PROC_FS |
| 84 | .show = crypto_kpp_show, |
| 85 | #endif |
| 86 | .report = crypto_kpp_report, |
| 87 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
| 88 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 89 | .type = CRYPTO_ALG_TYPE_KPP, |
| 90 | .tfmsize = offsetof(struct crypto_kpp, base), |
| 91 | }; |
| 92 | |
| 93 | struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask) |
| 94 | { |
| 95 | return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask); |
| 96 | } |
| 97 | EXPORT_SYMBOL_GPL(crypto_alloc_kpp); |
| 98 | |
| 99 | static void kpp_prepare_alg(struct kpp_alg *alg) |
| 100 | { |
| 101 | struct crypto_alg *base = &alg->base; |
| 102 | |
| 103 | base->cra_type = &crypto_kpp_type; |
| 104 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 105 | base->cra_flags |= CRYPTO_ALG_TYPE_KPP; |
| 106 | } |
| 107 | |
| 108 | int crypto_register_kpp(struct kpp_alg *alg) |
| 109 | { |
| 110 | struct crypto_alg *base = &alg->base; |
| 111 | |
| 112 | kpp_prepare_alg(alg); |
| 113 | return crypto_register_alg(base); |
| 114 | } |
| 115 | EXPORT_SYMBOL_GPL(crypto_register_kpp); |
| 116 | |
| 117 | void crypto_unregister_kpp(struct kpp_alg *alg) |
| 118 | { |
| 119 | crypto_unregister_alg(&alg->base); |
| 120 | } |
| 121 | EXPORT_SYMBOL_GPL(crypto_unregister_kpp); |
| 122 | |
| 123 | MODULE_LICENSE("GPL"); |
| 124 | MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); |