Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
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>
20#include <crypto/algapi.h>
21#include <linux/cryptouser.h>
22#include <net/netlink.h>
23#include <crypto/akcipher.h>
24#include "internal.h"
25
26#ifdef CONFIG_NET
27static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
28{
29 struct crypto_report_akcipher rakcipher;
30
31 strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
32
33 if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
34 sizeof(struct crypto_report_akcipher), &rakcipher))
35 goto nla_put_failure;
36 return 0;
37
38nla_put_failure:
39 return -EMSGSIZE;
40}
41#else
42static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
43{
44 return -ENOSYS;
45}
46#endif
47
48static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
49 __attribute__ ((unused));
50
51static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
52{
53 seq_puts(m, "type : akcipher\n");
54}
55
56static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
57{
58 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
59 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
60
61 alg->exit(akcipher);
62}
63
64static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
65{
66 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
67 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
68
69 if (alg->exit)
70 akcipher->base.exit = crypto_akcipher_exit_tfm;
71
72 if (alg->init)
73 return alg->init(akcipher);
74
75 return 0;
76}
77
78static const struct crypto_type crypto_akcipher_type = {
79 .extsize = crypto_alg_extsize,
80 .init_tfm = crypto_akcipher_init_tfm,
81#ifdef CONFIG_PROC_FS
82 .show = crypto_akcipher_show,
83#endif
84 .report = crypto_akcipher_report,
85 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
86 .maskset = CRYPTO_ALG_TYPE_MASK,
87 .type = CRYPTO_ALG_TYPE_AKCIPHER,
88 .tfmsize = offsetof(struct crypto_akcipher, base),
89};
90
91struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
92 u32 mask)
93{
94 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
95}
96EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
97
98int crypto_register_akcipher(struct akcipher_alg *alg)
99{
100 struct crypto_alg *base = &alg->base;
101
102 base->cra_type = &crypto_akcipher_type;
103 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
104 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
105 return crypto_register_alg(base);
106}
107EXPORT_SYMBOL_GPL(crypto_register_akcipher);
108
109void crypto_unregister_akcipher(struct akcipher_alg *alg)
110{
111 crypto_unregister_alg(&alg->base);
112}
113EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
114
115MODULE_LICENSE("GPL");
116MODULE_DESCRIPTION("Generic public key cipher type");