Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4e5f2c40 SB |
2 | /* |
3 | * Key-agreement Protocol Primitives (KPP) | |
4 | * | |
5 | * Copyright (c) 2016, Intel Corporation | |
6 | * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> | |
4e5f2c40 SB |
7 | */ |
8 | #include <linux/errno.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/seq_file.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/crypto.h> | |
15 | #include <crypto/algapi.h> | |
16 | #include <linux/cryptouser.h> | |
d8c34b94 | 17 | #include <linux/compiler.h> |
4e5f2c40 SB |
18 | #include <net/netlink.h> |
19 | #include <crypto/kpp.h> | |
20 | #include <crypto/internal/kpp.h> | |
21 | #include "internal.h" | |
22 | ||
23 | #ifdef CONFIG_NET | |
24 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) | |
25 | { | |
26 | struct crypto_report_kpp rkpp; | |
27 | ||
37db69e0 | 28 | memset(&rkpp, 0, sizeof(rkpp)); |
4e5f2c40 | 29 | |
37db69e0 | 30 | strscpy(rkpp.type, "kpp", sizeof(rkpp.type)); |
4e5f2c40 | 31 | |
37db69e0 | 32 | return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp); |
4e5f2c40 SB |
33 | } |
34 | #else | |
35 | static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg) | |
36 | { | |
37 | return -ENOSYS; | |
38 | } | |
39 | #endif | |
40 | ||
41 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) | |
d8c34b94 | 42 | __maybe_unused; |
4e5f2c40 SB |
43 | |
44 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) | |
45 | { | |
46 | seq_puts(m, "type : kpp\n"); | |
47 | } | |
48 | ||
49 | static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) | |
50 | { | |
51 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); | |
52 | struct kpp_alg *alg = crypto_kpp_alg(kpp); | |
53 | ||
54 | alg->exit(kpp); | |
55 | } | |
56 | ||
57 | static int crypto_kpp_init_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 | if (alg->exit) | |
63 | kpp->base.exit = crypto_kpp_exit_tfm; | |
64 | ||
65 | if (alg->init) | |
66 | return alg->init(kpp); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
1038fd78 NS |
71 | static void crypto_kpp_free_instance(struct crypto_instance *inst) |
72 | { | |
73 | struct kpp_instance *kpp = kpp_instance(inst); | |
74 | ||
75 | kpp->free(kpp); | |
76 | } | |
77 | ||
4e5f2c40 SB |
78 | static const struct crypto_type crypto_kpp_type = { |
79 | .extsize = crypto_alg_extsize, | |
80 | .init_tfm = crypto_kpp_init_tfm, | |
1038fd78 | 81 | .free = crypto_kpp_free_instance, |
4e5f2c40 SB |
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 | ||
46ed5269 NS |
98 | int crypto_grab_kpp(struct crypto_kpp_spawn *spawn, |
99 | struct crypto_instance *inst, | |
100 | const char *name, u32 type, u32 mask) | |
101 | { | |
102 | spawn->base.frontend = &crypto_kpp_type; | |
103 | return crypto_grab_spawn(&spawn->base, inst, name, type, mask); | |
104 | } | |
105 | EXPORT_SYMBOL_GPL(crypto_grab_kpp); | |
106 | ||
4e5f2c40 SB |
107 | static void kpp_prepare_alg(struct kpp_alg *alg) |
108 | { | |
109 | struct crypto_alg *base = &alg->base; | |
110 | ||
111 | base->cra_type = &crypto_kpp_type; | |
112 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
113 | base->cra_flags |= CRYPTO_ALG_TYPE_KPP; | |
114 | } | |
115 | ||
116 | int crypto_register_kpp(struct kpp_alg *alg) | |
117 | { | |
118 | struct crypto_alg *base = &alg->base; | |
119 | ||
120 | kpp_prepare_alg(alg); | |
121 | return crypto_register_alg(base); | |
122 | } | |
123 | EXPORT_SYMBOL_GPL(crypto_register_kpp); | |
124 | ||
125 | void crypto_unregister_kpp(struct kpp_alg *alg) | |
126 | { | |
127 | crypto_unregister_alg(&alg->base); | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(crypto_unregister_kpp); | |
130 | ||
1038fd78 NS |
131 | int kpp_register_instance(struct crypto_template *tmpl, |
132 | struct kpp_instance *inst) | |
133 | { | |
134 | if (WARN_ON(!inst->free)) | |
135 | return -EINVAL; | |
136 | ||
137 | kpp_prepare_alg(&inst->alg); | |
138 | ||
139 | return crypto_register_instance(tmpl, kpp_crypto_instance(inst)); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(kpp_register_instance); | |
142 | ||
4e5f2c40 SB |
143 | MODULE_LICENSE("GPL"); |
144 | MODULE_DESCRIPTION("Key-agreement Protocol Primitives"); |