1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Key-agreement Protocol Primitives (KPP)
5 * Copyright (c) 2016, Intel Corporation
6 * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
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>
20 static int __maybe_unused crypto_kpp_report(
21 struct sk_buff *skb, struct crypto_alg *alg)
23 struct crypto_report_kpp rkpp;
25 memset(&rkpp, 0, sizeof(rkpp));
27 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
29 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
32 static void 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)
37 seq_puts(m, "type : kpp\n");
40 static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
42 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
43 struct kpp_alg *alg = crypto_kpp_alg(kpp);
48 static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
50 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
51 struct kpp_alg *alg = crypto_kpp_alg(kpp);
54 kpp->base.exit = crypto_kpp_exit_tfm;
57 return alg->init(kpp);
62 static void crypto_kpp_free_instance(struct crypto_instance *inst)
64 struct kpp_instance *kpp = kpp_instance(inst);
69 static int __maybe_unused crypto_kpp_report_stat(
70 struct sk_buff *skb, struct crypto_alg *alg)
72 struct kpp_alg *kpp = __crypto_kpp_alg(alg);
73 struct crypto_istat_kpp *istat;
74 struct crypto_stat_kpp rkpp;
76 istat = kpp_get_stat(kpp);
78 memset(&rkpp, 0, sizeof(rkpp));
80 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
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);
89 return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp);
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,
97 .show = crypto_kpp_show,
99 #ifdef CONFIG_CRYPTO_USER
100 .report = crypto_kpp_report,
102 #ifdef CONFIG_CRYPTO_STATS
103 .report_stat = crypto_kpp_report_stat,
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),
111 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
113 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
115 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
117 int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
118 struct crypto_instance *inst,
119 const char *name, u32 type, u32 mask)
121 spawn->base.frontend = &crypto_kpp_type;
122 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
124 EXPORT_SYMBOL_GPL(crypto_grab_kpp);
126 int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
128 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
130 EXPORT_SYMBOL_GPL(crypto_has_kpp);
132 static void kpp_prepare_alg(struct kpp_alg *alg)
134 struct crypto_istat_kpp *istat = kpp_get_stat(alg);
135 struct crypto_alg *base = &alg->base;
137 base->cra_type = &crypto_kpp_type;
138 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
139 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
141 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
142 memset(istat, 0, sizeof(*istat));
145 int crypto_register_kpp(struct kpp_alg *alg)
147 struct crypto_alg *base = &alg->base;
149 kpp_prepare_alg(alg);
150 return crypto_register_alg(base);
152 EXPORT_SYMBOL_GPL(crypto_register_kpp);
154 void crypto_unregister_kpp(struct kpp_alg *alg)
156 crypto_unregister_alg(&alg->base);
158 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
160 int kpp_register_instance(struct crypto_template *tmpl,
161 struct kpp_instance *inst)
163 if (WARN_ON(!inst->free))
166 kpp_prepare_alg(&inst->alg);
168 return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
170 EXPORT_SYMBOL_GPL(kpp_register_instance);
172 MODULE_LICENSE("GPL");
173 MODULE_DESCRIPTION("Key-agreement Protocol Primitives");