tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#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>
21#include "internal.h"
22
23#ifdef CONFIG_NET
24static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
25{
26 struct crypto_report_kpp rkpp;
27
28 memset(&rkpp, 0, sizeof(rkpp));
29
30 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
31
32 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
33}
34#else
35static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
36{
37 return -ENOSYS;
38}
39#endif
40
41static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
42 __maybe_unused;
43
44static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
45{
46 seq_puts(m, "type : kpp\n");
47}
48
49static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
50{
51 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
52 struct kpp_alg *alg = crypto_kpp_alg(kpp);
53
54 alg->exit(kpp);
55}
56
57static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
58{
59 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
60 struct kpp_alg *alg = crypto_kpp_alg(kpp);
61
62 if (alg->exit)
63 kpp->base.exit = crypto_kpp_exit_tfm;
64
65 if (alg->init)
66 return alg->init(kpp);
67
68 return 0;
69}
70
71static void crypto_kpp_free_instance(struct crypto_instance *inst)
72{
73 struct kpp_instance *kpp = kpp_instance(inst);
74
75 kpp->free(kpp);
76}
77
78static 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,
82#ifdef CONFIG_PROC_FS
83 .show = crypto_kpp_show,
84#endif
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),
90};
91
92struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
93{
94 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
95}
96EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
97
98int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
99 struct crypto_instance *inst,
100 const char *name, u32 type, u32 mask)
101{
102 spawn->base.frontend = &crypto_kpp_type;
103 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
104}
105EXPORT_SYMBOL_GPL(crypto_grab_kpp);
106
107int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
108{
109 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
110}
111EXPORT_SYMBOL_GPL(crypto_has_kpp);
112
113static void kpp_prepare_alg(struct kpp_alg *alg)
114{
115 struct crypto_alg *base = &alg->base;
116
117 base->cra_type = &crypto_kpp_type;
118 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
119 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
120}
121
122int crypto_register_kpp(struct kpp_alg *alg)
123{
124 struct crypto_alg *base = &alg->base;
125
126 kpp_prepare_alg(alg);
127 return crypto_register_alg(base);
128}
129EXPORT_SYMBOL_GPL(crypto_register_kpp);
130
131void crypto_unregister_kpp(struct kpp_alg *alg)
132{
133 crypto_unregister_alg(&alg->base);
134}
135EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
136
137int kpp_register_instance(struct crypto_template *tmpl,
138 struct kpp_instance *inst)
139{
140 if (WARN_ON(!inst->free))
141 return -EINVAL;
142
143 kpp_prepare_alg(&inst->alg);
144
145 return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
146}
147EXPORT_SYMBOL_GPL(kpp_register_instance);
148
149MODULE_LICENSE("GPL");
150MODULE_DESCRIPTION("Key-agreement Protocol Primitives");