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
20static 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(s: &rkpp, c: 0, n: sizeof(rkpp));
26
27 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
28
29 return nla_put(skb, attrtype: CRYPTOCFGA_REPORT_KPP, attrlen: sizeof(rkpp), data: &rkpp);
30}
31
32static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
33 __maybe_unused;
34
35static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
36{
37 seq_puts(m, s: "type : kpp\n");
38}
39
40static 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
48static 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
62static 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
69static const struct crypto_type crypto_kpp_type = {
70 .extsize = crypto_alg_extsize,
71 .init_tfm = crypto_kpp_init_tfm,
72 .free = crypto_kpp_free_instance,
73#ifdef CONFIG_PROC_FS
74 .show = crypto_kpp_show,
75#endif
76#if IS_ENABLED(CONFIG_CRYPTO_USER)
77 .report = crypto_kpp_report,
78#endif
79 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
80 .maskset = CRYPTO_ALG_TYPE_MASK,
81 .type = CRYPTO_ALG_TYPE_KPP,
82 .tfmsize = offsetof(struct crypto_kpp, base),
83 .algsize = offsetof(struct kpp_alg, base),
84};
85
86struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
87{
88 return crypto_alloc_tfm(alg_name, frontend: &crypto_kpp_type, type, mask);
89}
90EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
91
92int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
93 struct crypto_instance *inst,
94 const char *name, u32 type, u32 mask)
95{
96 spawn->base.frontend = &crypto_kpp_type;
97 return crypto_grab_spawn(spawn: &spawn->base, inst, name, type, mask);
98}
99EXPORT_SYMBOL_GPL(crypto_grab_kpp);
100
101int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
102{
103 return crypto_type_has_alg(name: alg_name, frontend: &crypto_kpp_type, type, mask);
104}
105EXPORT_SYMBOL_GPL(crypto_has_kpp);
106
107static 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
116int 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(alg: base);
122}
123EXPORT_SYMBOL_GPL(crypto_register_kpp);
124
125void crypto_unregister_kpp(struct kpp_alg *alg)
126{
127 crypto_unregister_alg(alg: &alg->base);
128}
129EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
130
131int 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(alg: &inst->alg);
138
139 return crypto_register_instance(tmpl, inst: kpp_crypto_instance(inst));
140}
141EXPORT_SYMBOL_GPL(kpp_register_instance);
142
143MODULE_LICENSE("GPL");
144MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
145