tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Cryptographic API.
3 *
4 * Partial (de)compression operations.
5 *
6 * Copyright 2008 Sony Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program.
19 * If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include <linux/crypto.h>
23#include <linux/errno.h>
24#include <linux/module.h>
25#include <linux/seq_file.h>
26#include <linux/string.h>
27#include <linux/cryptouser.h>
28#include <net/netlink.h>
29
30#include <crypto/compress.h>
31#include <crypto/internal/compress.h>
32
33#include "internal.h"
34
35
36static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
37{
38 return 0;
39}
40
41static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)
42{
43 return alg->cra_ctxsize;
44}
45
46static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
47{
48 return 0;
49}
50
51#ifdef CONFIG_NET
52static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
53{
54 struct crypto_report_comp rpcomp;
55
56 snprintf(rpcomp.type, CRYPTO_MAX_ALG_NAME, "%s", "pcomp");
57
58 if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
59 sizeof(struct crypto_report_comp), &rpcomp))
60 goto nla_put_failure;
61 return 0;
62
63nla_put_failure:
64 return -EMSGSIZE;
65}
66#else
67static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
68{
69 return -ENOSYS;
70}
71#endif
72
73static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
74 __attribute__ ((unused));
75static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
76{
77 seq_printf(m, "type : pcomp\n");
78}
79
80static const struct crypto_type crypto_pcomp_type = {
81 .extsize = crypto_pcomp_extsize,
82 .init = crypto_pcomp_init,
83 .init_tfm = crypto_pcomp_init_tfm,
84#ifdef CONFIG_PROC_FS
85 .show = crypto_pcomp_show,
86#endif
87 .report = crypto_pcomp_report,
88 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
89 .maskset = CRYPTO_ALG_TYPE_MASK,
90 .type = CRYPTO_ALG_TYPE_PCOMPRESS,
91 .tfmsize = offsetof(struct crypto_pcomp, base),
92};
93
94struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
95 u32 mask)
96{
97 return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
98}
99EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
100
101int crypto_register_pcomp(struct pcomp_alg *alg)
102{
103 struct crypto_alg *base = &alg->base;
104
105 base->cra_type = &crypto_pcomp_type;
106 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
107 base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
108
109 return crypto_register_alg(base);
110}
111EXPORT_SYMBOL_GPL(crypto_register_pcomp);
112
113int crypto_unregister_pcomp(struct pcomp_alg *alg)
114{
115 return crypto_unregister_alg(&alg->base);
116}
117EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
118
119MODULE_LICENSE("GPL");
120MODULE_DESCRIPTION("Partial (de)compression type");
121MODULE_AUTHOR("Sony Corporation");