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Tadeusz Struk3c339ab2015-06-16 10:30:55 -07001/*
2 * Public Key Encryption
3 *
4 * Copyright (c) 2015, Intel Corporation
5 * Authors: Tadeusz Struk <tadeusz.struk@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>
Gideon Israel Dsouzad8c34b92016-12-31 21:26:23 +053020#include <linux/compiler.h>
Tadeusz Struk3c339ab2015-06-16 10:30:55 -070021#include <crypto/algapi.h>
22#include <linux/cryptouser.h>
23#include <net/netlink.h>
24#include <crypto/akcipher.h>
Andrzej Zaborowski28a46182015-12-05 17:09:33 +010025#include <crypto/internal/akcipher.h>
Tadeusz Struk3c339ab2015-06-16 10:30:55 -070026#include "internal.h"
27
28#ifdef CONFIG_NET
29static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
30{
31 struct crypto_report_akcipher rakcipher;
32
33 strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
34
35 if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
36 sizeof(struct crypto_report_akcipher), &rakcipher))
37 goto nla_put_failure;
38 return 0;
39
40nla_put_failure:
41 return -EMSGSIZE;
42}
43#else
44static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
45{
46 return -ENOSYS;
47}
48#endif
49
50static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
Gideon Israel Dsouzad8c34b92016-12-31 21:26:23 +053051 __maybe_unused;
Tadeusz Struk3c339ab2015-06-16 10:30:55 -070052
53static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
54{
55 seq_puts(m, "type : akcipher\n");
56}
57
58static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
59{
60 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
61 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
62
63 alg->exit(akcipher);
64}
65
66static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
67{
68 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
69 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
70
71 if (alg->exit)
72 akcipher->base.exit = crypto_akcipher_exit_tfm;
73
74 if (alg->init)
75 return alg->init(akcipher);
76
77 return 0;
78}
79
Andrzej Zaborowski28a46182015-12-05 17:09:33 +010080static void crypto_akcipher_free_instance(struct crypto_instance *inst)
81{
82 struct akcipher_instance *akcipher = akcipher_instance(inst);
83
84 akcipher->free(akcipher);
85}
86
Tadeusz Struk3c339ab2015-06-16 10:30:55 -070087static const struct crypto_type crypto_akcipher_type = {
88 .extsize = crypto_alg_extsize,
89 .init_tfm = crypto_akcipher_init_tfm,
Andrzej Zaborowski28a46182015-12-05 17:09:33 +010090 .free = crypto_akcipher_free_instance,
Tadeusz Struk3c339ab2015-06-16 10:30:55 -070091#ifdef CONFIG_PROC_FS
92 .show = crypto_akcipher_show,
93#endif
94 .report = crypto_akcipher_report,
95 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
96 .maskset = CRYPTO_ALG_TYPE_MASK,
97 .type = CRYPTO_ALG_TYPE_AKCIPHER,
98 .tfmsize = offsetof(struct crypto_akcipher, base),
99};
100
Andrzej Zaborowski28a46182015-12-05 17:09:33 +0100101int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
102 u32 type, u32 mask)
103{
104 spawn->base.frontend = &crypto_akcipher_type;
105 return crypto_grab_spawn(&spawn->base, name, type, mask);
106}
107EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
108
Tadeusz Struk3c339ab2015-06-16 10:30:55 -0700109struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
110 u32 mask)
111{
112 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
113}
114EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
115
Andrzej Zaborowski28a46182015-12-05 17:09:33 +0100116static void akcipher_prepare_alg(struct akcipher_alg *alg)
Tadeusz Struk3c339ab2015-06-16 10:30:55 -0700117{
118 struct crypto_alg *base = &alg->base;
119
120 base->cra_type = &crypto_akcipher_type;
121 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
122 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
Andrzej Zaborowski28a46182015-12-05 17:09:33 +0100123}
124
125int crypto_register_akcipher(struct akcipher_alg *alg)
126{
127 struct crypto_alg *base = &alg->base;
128
129 akcipher_prepare_alg(alg);
Tadeusz Struk3c339ab2015-06-16 10:30:55 -0700130 return crypto_register_alg(base);
131}
132EXPORT_SYMBOL_GPL(crypto_register_akcipher);
133
134void crypto_unregister_akcipher(struct akcipher_alg *alg)
135{
136 crypto_unregister_alg(&alg->base);
137}
138EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
139
Andrzej Zaborowski28a46182015-12-05 17:09:33 +0100140int akcipher_register_instance(struct crypto_template *tmpl,
141 struct akcipher_instance *inst)
142{
143 akcipher_prepare_alg(&inst->alg);
144 return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
145}
146EXPORT_SYMBOL_GPL(akcipher_register_instance);
147
Tadeusz Struk3c339ab2015-06-16 10:30:55 -0700148MODULE_LICENSE("GPL");
Tadeusz Struk338a9de2015-06-23 10:18:53 -0700149MODULE_DESCRIPTION("Generic public key cipher type");