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4e5f2c40 SB |
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"); |