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
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)29 static 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
40 nla_put_failure:
41 return -EMSGSIZE;
42 }
43 #else
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)44 static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
45 {
46 return -ENOSYS;
47 }
48 #endif
49
50 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
51 __maybe_unused;
52
crypto_kpp_show(struct seq_file * m,struct crypto_alg * alg)53 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
54 {
55 seq_puts(m, "type : kpp\n");
56 }
57
crypto_kpp_exit_tfm(struct crypto_tfm * tfm)58 static 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
crypto_kpp_init_tfm(struct crypto_tfm * tfm)66 static 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
80 static 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
crypto_alloc_kpp(const char * alg_name,u32 type,u32 mask)93 struct 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 }
97 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
98
kpp_prepare_alg(struct kpp_alg * alg)99 static 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
crypto_register_kpp(struct kpp_alg * alg)108 int 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 }
115 EXPORT_SYMBOL_GPL(crypto_register_kpp);
116
crypto_unregister_kpp(struct kpp_alg * alg)117 void crypto_unregister_kpp(struct kpp_alg *alg)
118 {
119 crypto_unregister_alg(&alg->base);
120 }
121 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
122
123 MODULE_LICENSE("GPL");
124 MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
125
