Linux kernel mirror (for testing)
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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 const struct crypto_type crypto_kpp_type = {
72 .extsize = crypto_alg_extsize,
73 .init_tfm = crypto_kpp_init_tfm,
74#ifdef CONFIG_PROC_FS
75 .show = crypto_kpp_show,
76#endif
77 .report = crypto_kpp_report,
78 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
79 .maskset = CRYPTO_ALG_TYPE_MASK,
80 .type = CRYPTO_ALG_TYPE_KPP,
81 .tfmsize = offsetof(struct crypto_kpp, base),
82};
83
84struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
85{
86 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
87}
88EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
89
90static void kpp_prepare_alg(struct kpp_alg *alg)
91{
92 struct crypto_alg *base = &alg->base;
93
94 base->cra_type = &crypto_kpp_type;
95 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
96 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
97}
98
99int crypto_register_kpp(struct kpp_alg *alg)
100{
101 struct crypto_alg *base = &alg->base;
102
103 kpp_prepare_alg(alg);
104 return crypto_register_alg(base);
105}
106EXPORT_SYMBOL_GPL(crypto_register_kpp);
107
108void crypto_unregister_kpp(struct kpp_alg *alg)
109{
110 crypto_unregister_alg(&alg->base);
111}
112EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
113
114MODULE_LICENSE("GPL");
115MODULE_DESCRIPTION("Key-agreement Protocol Primitives");