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
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)24 static 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
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)35 static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
36 {
37 return -ENOSYS;
38 }
39 #endif
40
41 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
42 __maybe_unused;
43
crypto_kpp_show(struct seq_file * m,struct crypto_alg * alg)44 static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
45 {
46 seq_puts(m, "type : kpp\n");
47 }
48
crypto_kpp_exit_tfm(struct crypto_tfm * tfm)49 static 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
crypto_kpp_init_tfm(struct crypto_tfm * tfm)57 static 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
71 static 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
crypto_alloc_kpp(const char * alg_name,u32 type,u32 mask)84 struct 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 }
88 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
89
kpp_prepare_alg(struct kpp_alg * alg)90 static 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
crypto_register_kpp(struct kpp_alg * alg)99 int 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 }
106 EXPORT_SYMBOL_GPL(crypto_register_kpp);
107
crypto_unregister_kpp(struct kpp_alg * alg)108 void crypto_unregister_kpp(struct kpp_alg *alg)
109 {
110 crypto_unregister_alg(&alg->base);
111 }
112 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
113
114 MODULE_LICENSE("GPL");
115 MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
116