blob: d36ce05eee43856ba9378944427c6230ad272df3
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 <net/netlink.h> |
23 | #include <crypto/kpp.h> |
24 | #include <crypto/internal/kpp.h> |
25 | #include "internal.h" |
26 | |
27 | #ifdef CONFIG_NET |
28 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) |
29 | { |
30 | struct crypto_report_kpp rkpp; |
31 | |
32 | strncpy(rkpp.type, "kpp", sizeof(rkpp.type)); |
33 | |
34 | if (nla_put(skb, CRYPTOCFGA_REPORT_KPP, |
35 | sizeof(struct crypto_report_kpp), &rkpp)) |
36 | goto nla_put_failure; |
37 | return 0; |
38 | |
39 | nla_put_failure: |
40 | return -EMSGSIZE; |
41 | } |
42 | #else |
43 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) |
44 | { |
45 | return -ENOSYS; |
46 | } |
47 | #endif |
48 | |
49 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
50 | __attribute__ ((unused)); |
51 | |
52 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
53 | { |
54 | seq_puts(m, "type : kpp\n"); |
55 | } |
56 | |
57 | static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) |
58 | { |
59 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
60 | struct kpp_alg *alg = crypto_kpp_alg(kpp); |
61 | |
62 | alg->exit(kpp); |
63 | } |
64 | |
65 | static int crypto_kpp_init_tfm(struct crypto_tfm *tfm) |
66 | { |
67 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
68 | struct kpp_alg *alg = crypto_kpp_alg(kpp); |
69 | |
70 | if (alg->exit) |
71 | kpp->base.exit = crypto_kpp_exit_tfm; |
72 | |
73 | if (alg->init) |
74 | return alg->init(kpp); |
75 | |
76 | return 0; |
77 | } |
78 | |
79 | static const struct crypto_type crypto_kpp_type = { |
80 | .extsize = crypto_alg_extsize, |
81 | .init_tfm = crypto_kpp_init_tfm, |
82 | #ifdef CONFIG_PROC_FS |
83 | .show = crypto_kpp_show, |
84 | #endif |
85 | .report = crypto_kpp_report, |
86 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
87 | .maskset = CRYPTO_ALG_TYPE_MASK, |
88 | .type = CRYPTO_ALG_TYPE_KPP, |
89 | .tfmsize = offsetof(struct crypto_kpp, base), |
90 | }; |
91 | |
92 | struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask) |
93 | { |
94 | return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask); |
95 | } |
96 | EXPORT_SYMBOL_GPL(crypto_alloc_kpp); |
97 | |
98 | static void kpp_prepare_alg(struct kpp_alg *alg) |
99 | { |
100 | struct crypto_alg *base = &alg->base; |
101 | |
102 | base->cra_type = &crypto_kpp_type; |
103 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
104 | base->cra_flags |= CRYPTO_ALG_TYPE_KPP; |
105 | } |
106 | |
107 | int crypto_register_kpp(struct kpp_alg *alg) |
108 | { |
109 | struct crypto_alg *base = &alg->base; |
110 | |
111 | kpp_prepare_alg(alg); |
112 | return crypto_register_alg(base); |
113 | } |
114 | EXPORT_SYMBOL_GPL(crypto_register_kpp); |
115 | |
116 | void crypto_unregister_kpp(struct kpp_alg *alg) |
117 | { |
118 | crypto_unregister_alg(&alg->base); |
119 | } |
120 | EXPORT_SYMBOL_GPL(crypto_unregister_kpp); |
121 | |
122 | MODULE_LICENSE("GPL"); |
123 | MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); |
124 |