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 <crypto/public_key.h>
25#include "internal.h"
26
27#ifdef CONFIG_NET
28static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
29{
30 struct crypto_report_akcipher rakcipher;
31
32 strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
33
34 if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
35 sizeof(struct crypto_report_akcipher), &rakcipher))
36 goto nla_put_failure;
37 return 0;
38
39nla_put_failure:
40 return -EMSGSIZE;
41}
42#else
43static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
44{
45 return -ENOSYS;
46}
47#endif
48
49static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
50 __attribute__ ((unused));
51
52static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
53{
54 seq_puts(m, "type : akcipher\n");
55}
56
57static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
58{
59 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
60 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
61
62 alg->exit(akcipher);
63}
64
65static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
66{
67 struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
68 struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
69
70 if (alg->exit)
71 akcipher->base.exit = crypto_akcipher_exit_tfm;
72
73 if (alg->init)
74 return alg->init(akcipher);
75
76 return 0;
77}
78
79static const struct crypto_type crypto_akcipher_type = {
80 .extsize = crypto_alg_extsize,
81 .init_tfm = crypto_akcipher_init_tfm,
82#ifdef CONFIG_PROC_FS
83 .show = crypto_akcipher_show,
84#endif
85 .report = crypto_akcipher_report,
86 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
87 .maskset = CRYPTO_ALG_TYPE_MASK,
88 .type = CRYPTO_ALG_TYPE_AKCIPHER,
89 .tfmsize = offsetof(struct crypto_akcipher, base),
90};
91
92struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
93 u32 mask)
94{
95 return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
96}
97EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
98
99int crypto_register_akcipher(struct akcipher_alg *alg)
100{
101 struct crypto_alg *base = &alg->base;
102
103 base->cra_type = &crypto_akcipher_type;
104 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
105 base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
106 return crypto_register_alg(base);
107}
108EXPORT_SYMBOL_GPL(crypto_register_akcipher);
109
110void crypto_unregister_akcipher(struct akcipher_alg *alg)
111{
112 crypto_unregister_alg(&alg->base);
113}
114EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
115
116MODULE_LICENSE("GPL");
117MODULE_DESCRIPTION("Generic public key cipher type");