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>
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>
17 #include <linux/compiler.h>
18 #include <net/netlink.h>
19 #include <crypto/kpp.h>
20 #include <crypto/internal/kpp.h>
24 static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
26 struct crypto_report_kpp rkpp;
28 memset(&rkpp, 0, sizeof(rkpp));
30 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
32 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
35 static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
41 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
44 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
46 seq_puts(m, "type : kpp\n");
49 static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
51 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
52 struct kpp_alg *alg = crypto_kpp_alg(kpp);
57 static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
59 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
60 struct kpp_alg *alg = crypto_kpp_alg(kpp);
63 kpp->base.exit = crypto_kpp_exit_tfm;
66 return alg->init(kpp);
71 static void crypto_kpp_free_instance(struct crypto_instance *inst)
73 struct kpp_instance *kpp = kpp_instance(inst);
78 static const struct crypto_type crypto_kpp_type = {
79 .extsize = crypto_alg_extsize,
80 .init_tfm = crypto_kpp_init_tfm,
81 .free = crypto_kpp_free_instance,
83 .show = crypto_kpp_show,
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),
92 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
94 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
96 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
98 int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
99 struct crypto_instance *inst,
100 const char *name, u32 type, u32 mask)
102 spawn->base.frontend = &crypto_kpp_type;
103 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
105 EXPORT_SYMBOL_GPL(crypto_grab_kpp);
107 int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
109 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
111 EXPORT_SYMBOL_GPL(crypto_has_kpp);
113 static void kpp_prepare_alg(struct kpp_alg *alg)
115 struct crypto_alg *base = &alg->base;
117 base->cra_type = &crypto_kpp_type;
118 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
119 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
122 int crypto_register_kpp(struct kpp_alg *alg)
124 struct crypto_alg *base = &alg->base;
126 kpp_prepare_alg(alg);
127 return crypto_register_alg(base);
129 EXPORT_SYMBOL_GPL(crypto_register_kpp);
131 void crypto_unregister_kpp(struct kpp_alg *alg)
133 crypto_unregister_alg(&alg->base);
135 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
137 int kpp_register_instance(struct crypto_template *tmpl,
138 struct kpp_instance *inst)
140 if (WARN_ON(!inst->free))
143 kpp_prepare_alg(&inst->alg);
145 return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
147 EXPORT_SYMBOL_GPL(kpp_register_instance);
149 MODULE_LICENSE("GPL");
150 MODULE_DESCRIPTION("Key-agreement Protocol Primitives");