Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/*
2 * Key-agreement Protocol Primitives (KPP)
3 *
4 * Copyright (c) 2016, Intel Corporation
5 * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 */
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/seq_file.h>
17#include <linux/slab.h>
18#include <linux/string.h>
19#include <linux/crypto.h>
20#include <crypto/algapi.h>
21#include <linux/cryptouser.h>
22#include <linux/compiler.h>
23#include <net/netlink.h>
24#include <crypto/kpp.h>
25#include <crypto/internal/kpp.h>
26#include "internal.h"
27
28#ifdef CONFIG_NET
29static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
30{
31 struct crypto_report_kpp rkpp;
32
33 strncpy(rkpp.type, "kpp", sizeof(rkpp.type));
34
35 if (nla_put(skb, CRYPTOCFGA_REPORT_KPP,
36 sizeof(struct crypto_report_kpp), &rkpp))
37 goto nla_put_failure;
38 return 0;
39
40nla_put_failure:
41 return -EMSGSIZE;
42}
43#else
44static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
45{
46 return -ENOSYS;
47}
48#endif
49
50static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
51 __maybe_unused;
52
53static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
54{
55 seq_puts(m, "type : kpp\n");
56}
57
58static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
59{
60 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
61 struct kpp_alg *alg = crypto_kpp_alg(kpp);
62
63 alg->exit(kpp);
64}
65
66static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
67{
68 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
69 struct kpp_alg *alg = crypto_kpp_alg(kpp);
70
71 if (alg->exit)
72 kpp->base.exit = crypto_kpp_exit_tfm;
73
74 if (alg->init)
75 return alg->init(kpp);
76
77 return 0;
78}
79
80static const struct crypto_type crypto_kpp_type = {
81 .extsize = crypto_alg_extsize,
82 .init_tfm = crypto_kpp_init_tfm,
83#ifdef CONFIG_PROC_FS
84 .show = crypto_kpp_show,
85#endif
86 .report = crypto_kpp_report,
87 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
88 .maskset = CRYPTO_ALG_TYPE_MASK,
89 .type = CRYPTO_ALG_TYPE_KPP,
90 .tfmsize = offsetof(struct crypto_kpp, base),
91};
92
93struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
94{
95 return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
96}
97EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
98
99static void kpp_prepare_alg(struct kpp_alg *alg)
100{
101 struct crypto_alg *base = &alg->base;
102
103 base->cra_type = &crypto_kpp_type;
104 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
105 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
106}
107
108int crypto_register_kpp(struct kpp_alg *alg)
109{
110 struct crypto_alg *base = &alg->base;
111
112 kpp_prepare_alg(alg);
113 return crypto_register_alg(base);
114}
115EXPORT_SYMBOL_GPL(crypto_register_kpp);
116
117void crypto_unregister_kpp(struct kpp_alg *alg)
118{
119 crypto_unregister_alg(&alg->base);
120}
121EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
122
123MODULE_LICENSE("GPL");
124MODULE_DESCRIPTION("Key-agreement Protocol Primitives");