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
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)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(rkpp.type, "kpp", sizeof(rkpp.type));
28
29 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
30 }
31
32 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
33 __maybe_unused;
34
crypto_kpp_show(struct seq_file * m,struct crypto_alg * alg)35 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
36 {
37 seq_puts(m, "type : kpp\n");
38 }
39
crypto_kpp_exit_tfm(struct crypto_tfm * tfm)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(kpp);
44
45 alg->exit(kpp);
46 }
47
crypto_kpp_init_tfm(struct crypto_tfm * tfm)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(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
crypto_kpp_free_instance(struct crypto_instance * inst)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
crypto_kpp_report_stat(struct sk_buff * skb,struct crypto_alg * alg)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(kpp);
77
78 memset(&rkpp, 0, sizeof(rkpp));
79
80 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
81
82 rkpp.stat_setsecret_cnt = atomic64_read(&istat->setsecret_cnt);
83 rkpp.stat_generate_public_key_cnt =
84 atomic64_read(&istat->generate_public_key_cnt);
85 rkpp.stat_compute_shared_secret_cnt =
86 atomic64_read(&istat->compute_shared_secret_cnt);
87 rkpp.stat_err_cnt = atomic64_read(&istat->err_cnt);
88
89 return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &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
crypto_alloc_kpp(const char * alg_name,u32 type,u32 mask)111 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
112 {
113 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
114 }
115 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
116
crypto_grab_kpp(struct crypto_kpp_spawn * spawn,struct crypto_instance * inst,const char * name,u32 type,u32 mask)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->base, inst, name, type, mask);
123 }
124 EXPORT_SYMBOL_GPL(crypto_grab_kpp);
125
crypto_has_kpp(const char * alg_name,u32 type,u32 mask)126 int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
127 {
128 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
129 }
130 EXPORT_SYMBOL_GPL(crypto_has_kpp);
131
kpp_prepare_alg(struct kpp_alg * alg)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
crypto_register_kpp(struct kpp_alg * alg)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(base);
151 }
152 EXPORT_SYMBOL_GPL(crypto_register_kpp);
153
crypto_unregister_kpp(struct kpp_alg * alg)154 void crypto_unregister_kpp(struct kpp_alg *alg)
155 {
156 crypto_unregister_alg(&alg->base);
157 }
158 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
159
kpp_register_instance(struct crypto_template * tmpl,struct kpp_instance * inst)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(&inst->alg);
167
168 return crypto_register_instance(tmpl, 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