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
9 #include <crypto/internal/kpp.h>
10 #include <linux/cryptouser.h>
11 #include <linux/errno.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/seq_file.h>
15 #include <linux/string.h>
16 #include <net/netlink.h>
17
18 #include "internal.h"
19
crypto_kpp_report(struct sk_buff * skb,struct crypto_alg * alg)20 static int __maybe_unused crypto_kpp_report(
21 struct sk_buff *skb, struct crypto_alg *alg)
22 {
23 struct crypto_report_kpp rkpp;
24
25 memset(&rkpp, 0, sizeof(rkpp));
26
27 strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
28
29 return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
30 }
31
crypto_kpp_show(struct seq_file * m,struct crypto_alg * alg)32 static void __maybe_unused crypto_kpp_show(struct seq_file *m,
33 struct crypto_alg *alg)
34 {
35 seq_puts(m, "type : kpp\n");
36 }
37
crypto_kpp_exit_tfm(struct crypto_tfm * tfm)38 static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
39 {
40 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
41 struct kpp_alg *alg = crypto_kpp_alg(kpp);
42
43 alg->exit(kpp);
44 }
45
crypto_kpp_init_tfm(struct crypto_tfm * tfm)46 static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
47 {
48 struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
49 struct kpp_alg *alg = crypto_kpp_alg(kpp);
50
51 if (alg->exit)
52 kpp->base.exit = crypto_kpp_exit_tfm;
53
54 if (alg->init)
55 return alg->init(kpp);
56
57 return 0;
58 }
59
crypto_kpp_free_instance(struct crypto_instance * inst)60 static void crypto_kpp_free_instance(struct crypto_instance *inst)
61 {
62 struct kpp_instance *kpp = kpp_instance(inst);
63
64 kpp->free(kpp);
65 }
66
67 static const struct crypto_type crypto_kpp_type = {
68 .extsize = crypto_alg_extsize,
69 .init_tfm = crypto_kpp_init_tfm,
70 .free = crypto_kpp_free_instance,
71 #ifdef CONFIG_PROC_FS
72 .show = crypto_kpp_show,
73 #endif
74 #if IS_ENABLED(CONFIG_CRYPTO_USER)
75 .report = crypto_kpp_report,
76 #endif
77 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
78 .maskset = CRYPTO_ALG_TYPE_MASK,
79 .type = CRYPTO_ALG_TYPE_KPP,
80 .tfmsize = offsetof(struct crypto_kpp, base),
81 .algsize = offsetof(struct kpp_alg, 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
crypto_grab_kpp(struct crypto_kpp_spawn * spawn,struct crypto_instance * inst,const char * name,u32 type,u32 mask)90 int crypto_grab_kpp(struct crypto_kpp_spawn *spawn,
91 struct crypto_instance *inst,
92 const char *name, u32 type, u32 mask)
93 {
94 spawn->base.frontend = &crypto_kpp_type;
95 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
96 }
97 EXPORT_SYMBOL_GPL(crypto_grab_kpp);
98
crypto_has_kpp(const char * alg_name,u32 type,u32 mask)99 int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
100 {
101 return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
102 }
103 EXPORT_SYMBOL_GPL(crypto_has_kpp);
104
kpp_prepare_alg(struct kpp_alg * alg)105 static void kpp_prepare_alg(struct kpp_alg *alg)
106 {
107 struct crypto_alg *base = &alg->base;
108
109 base->cra_type = &crypto_kpp_type;
110 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
111 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
112 }
113
crypto_register_kpp(struct kpp_alg * alg)114 int crypto_register_kpp(struct kpp_alg *alg)
115 {
116 struct crypto_alg *base = &alg->base;
117
118 kpp_prepare_alg(alg);
119 return crypto_register_alg(base);
120 }
121 EXPORT_SYMBOL_GPL(crypto_register_kpp);
122
crypto_unregister_kpp(struct kpp_alg * alg)123 void crypto_unregister_kpp(struct kpp_alg *alg)
124 {
125 crypto_unregister_alg(&alg->base);
126 }
127 EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
128
kpp_register_instance(struct crypto_template * tmpl,struct kpp_instance * inst)129 int kpp_register_instance(struct crypto_template *tmpl,
130 struct kpp_instance *inst)
131 {
132 if (WARN_ON(!inst->free))
133 return -EINVAL;
134
135 kpp_prepare_alg(&inst->alg);
136
137 return crypto_register_instance(tmpl, kpp_crypto_instance(inst));
138 }
139 EXPORT_SYMBOL_GPL(kpp_register_instance);
140
141 MODULE_LICENSE("GPL");
142 MODULE_DESCRIPTION("Key-agreement Protocol Primitives");
143