1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Key-agreement Protocol Primitives (KPP) |
4 | * |
5 | * Copyright (c) 2016, Intel Corporation |
6 | * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> |
7 | */ |
8 | |
9 | #include <crypto/internal/kpp.h> |
10 | #include <linux/cryptouser.h> |
11 | #include <linux/errno.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> |
14 | #include <linux/seq_file.h> |
15 | #include <linux/string.h> |
16 | #include <net/netlink.h> |
17 | |
18 | #include "internal.h" |
19 | |
20 | static int __maybe_unused crypto_kpp_report( |
21 | struct sk_buff *skb, struct crypto_alg *alg) |
22 | { |
23 | struct crypto_report_kpp rkpp; |
24 | |
25 | memset(&rkpp, 0, sizeof(rkpp)); |
26 | |
27 | strscpy(p: rkpp.type, q: "kpp" , size: sizeof(rkpp.type)); |
28 | |
29 | return nla_put(skb, attrtype: CRYPTOCFGA_REPORT_KPP, attrlen: sizeof(rkpp), data: &rkpp); |
30 | } |
31 | |
32 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
33 | __maybe_unused; |
34 | |
35 | static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg) |
36 | { |
37 | seq_puts(m, s: "type : kpp\n" ); |
38 | } |
39 | |
40 | static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm) |
41 | { |
42 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
43 | struct kpp_alg *alg = crypto_kpp_alg(tfm: kpp); |
44 | |
45 | alg->exit(kpp); |
46 | } |
47 | |
48 | static int crypto_kpp_init_tfm(struct crypto_tfm *tfm) |
49 | { |
50 | struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm); |
51 | struct kpp_alg *alg = crypto_kpp_alg(tfm: kpp); |
52 | |
53 | if (alg->exit) |
54 | kpp->base.exit = crypto_kpp_exit_tfm; |
55 | |
56 | if (alg->init) |
57 | return alg->init(kpp); |
58 | |
59 | return 0; |
60 | } |
61 | |
62 | static void crypto_kpp_free_instance(struct crypto_instance *inst) |
63 | { |
64 | struct kpp_instance *kpp = kpp_instance(inst); |
65 | |
66 | kpp->free(kpp); |
67 | } |
68 | |
69 | static int __maybe_unused crypto_kpp_report_stat( |
70 | struct sk_buff *skb, struct crypto_alg *alg) |
71 | { |
72 | struct kpp_alg *kpp = __crypto_kpp_alg(alg); |
73 | struct crypto_istat_kpp *istat; |
74 | struct crypto_stat_kpp rkpp; |
75 | |
76 | istat = kpp_get_stat(alg: kpp); |
77 | |
78 | memset(&rkpp, 0, sizeof(rkpp)); |
79 | |
80 | strscpy(p: rkpp.type, q: "kpp" , size: sizeof(rkpp.type)); |
81 | |
82 | rkpp.stat_setsecret_cnt = atomic64_read(v: &istat->setsecret_cnt); |
83 | rkpp.stat_generate_public_key_cnt = |
84 | atomic64_read(v: &istat->generate_public_key_cnt); |
85 | rkpp.stat_compute_shared_secret_cnt = |
86 | atomic64_read(v: &istat->compute_shared_secret_cnt); |
87 | rkpp.stat_err_cnt = atomic64_read(v: &istat->err_cnt); |
88 | |
89 | return nla_put(skb, attrtype: CRYPTOCFGA_STAT_KPP, attrlen: sizeof(rkpp), data: &rkpp); |
90 | } |
91 | |
92 | static const struct crypto_type crypto_kpp_type = { |
93 | .extsize = crypto_alg_extsize, |
94 | .init_tfm = crypto_kpp_init_tfm, |
95 | .free = crypto_kpp_free_instance, |
96 | #ifdef CONFIG_PROC_FS |
97 | .show = crypto_kpp_show, |
98 | #endif |
99 | #if IS_ENABLED(CONFIG_CRYPTO_USER) |
100 | .report = crypto_kpp_report, |
101 | #endif |
102 | #ifdef CONFIG_CRYPTO_STATS |
103 | .report_stat = crypto_kpp_report_stat, |
104 | #endif |
105 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
106 | .maskset = CRYPTO_ALG_TYPE_MASK, |
107 | .type = CRYPTO_ALG_TYPE_KPP, |
108 | .tfmsize = offsetof(struct crypto_kpp, base), |
109 | }; |
110 | |
111 | struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask) |
112 | { |
113 | return crypto_alloc_tfm(alg_name, frontend: &crypto_kpp_type, type, mask); |
114 | } |
115 | EXPORT_SYMBOL_GPL(crypto_alloc_kpp); |
116 | |
117 | int crypto_grab_kpp(struct crypto_kpp_spawn *spawn, |
118 | struct crypto_instance *inst, |
119 | const char *name, u32 type, u32 mask) |
120 | { |
121 | spawn->base.frontend = &crypto_kpp_type; |
122 | return crypto_grab_spawn(spawn: &spawn->base, inst, name, type, mask); |
123 | } |
124 | EXPORT_SYMBOL_GPL(crypto_grab_kpp); |
125 | |
126 | int crypto_has_kpp(const char *alg_name, u32 type, u32 mask) |
127 | { |
128 | return crypto_type_has_alg(name: alg_name, frontend: &crypto_kpp_type, type, mask); |
129 | } |
130 | EXPORT_SYMBOL_GPL(crypto_has_kpp); |
131 | |
132 | static void kpp_prepare_alg(struct kpp_alg *alg) |
133 | { |
134 | struct crypto_istat_kpp *istat = kpp_get_stat(alg); |
135 | struct crypto_alg *base = &alg->base; |
136 | |
137 | base->cra_type = &crypto_kpp_type; |
138 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
139 | base->cra_flags |= CRYPTO_ALG_TYPE_KPP; |
140 | |
141 | if (IS_ENABLED(CONFIG_CRYPTO_STATS)) |
142 | memset(istat, 0, sizeof(*istat)); |
143 | } |
144 | |
145 | int crypto_register_kpp(struct kpp_alg *alg) |
146 | { |
147 | struct crypto_alg *base = &alg->base; |
148 | |
149 | kpp_prepare_alg(alg); |
150 | return crypto_register_alg(alg: base); |
151 | } |
152 | EXPORT_SYMBOL_GPL(crypto_register_kpp); |
153 | |
154 | void crypto_unregister_kpp(struct kpp_alg *alg) |
155 | { |
156 | crypto_unregister_alg(alg: &alg->base); |
157 | } |
158 | EXPORT_SYMBOL_GPL(crypto_unregister_kpp); |
159 | |
160 | int kpp_register_instance(struct crypto_template *tmpl, |
161 | struct kpp_instance *inst) |
162 | { |
163 | if (WARN_ON(!inst->free)) |
164 | return -EINVAL; |
165 | |
166 | kpp_prepare_alg(alg: &inst->alg); |
167 | |
168 | return crypto_register_instance(tmpl, inst: kpp_crypto_instance(inst)); |
169 | } |
170 | EXPORT_SYMBOL_GPL(kpp_register_instance); |
171 | |
172 | MODULE_LICENSE("GPL" ); |
173 | MODULE_DESCRIPTION("Key-agreement Protocol Primitives" ); |
174 | |