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
crypto_pcomp_init(struct crypto_tfm * tfm,u32 type,u32 mask)36 static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
37 {
38 return 0;
39 }
40
crypto_pcomp_init_tfm(struct crypto_tfm * tfm)41 static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
42 {
43 return 0;
44 }
45
46 #ifdef CONFIG_NET
crypto_pcomp_report(struct sk_buff * skb,struct crypto_alg * alg)47 static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
48 {
49 struct crypto_report_comp rpcomp;
50
51 strncpy(rpcomp.type, "pcomp", sizeof(rpcomp.type));
52 if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
53 sizeof(struct crypto_report_comp), &rpcomp))
54 goto nla_put_failure;
55 return 0;
56
57 nla_put_failure:
58 return -EMSGSIZE;
59 }
60 #else
crypto_pcomp_report(struct sk_buff * skb,struct crypto_alg * alg)61 static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
62 {
63 return -ENOSYS;
64 }
65 #endif
66
67 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
68 __attribute__ ((unused));
crypto_pcomp_show(struct seq_file * m,struct crypto_alg * alg)69 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
70 {
71 seq_printf(m, "type : pcomp\n");
72 }
73
74 static const struct crypto_type crypto_pcomp_type = {
75 .extsize = crypto_alg_extsize,
76 .init = crypto_pcomp_init,
77 .init_tfm = crypto_pcomp_init_tfm,
78 #ifdef CONFIG_PROC_FS
79 .show = crypto_pcomp_show,
80 #endif
81 .report = crypto_pcomp_report,
82 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
83 .maskset = CRYPTO_ALG_TYPE_MASK,
84 .type = CRYPTO_ALG_TYPE_PCOMPRESS,
85 .tfmsize = offsetof(struct crypto_pcomp, base),
86 };
87
crypto_alloc_pcomp(const char * alg_name,u32 type,u32 mask)88 struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
89 u32 mask)
90 {
91 return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
92 }
93 EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
94
crypto_register_pcomp(struct pcomp_alg * alg)95 int crypto_register_pcomp(struct pcomp_alg *alg)
96 {
97 struct crypto_alg *base = &alg->base;
98
99 base->cra_type = &crypto_pcomp_type;
100 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
101 base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
102
103 return crypto_register_alg(base);
104 }
105 EXPORT_SYMBOL_GPL(crypto_register_pcomp);
106
crypto_unregister_pcomp(struct pcomp_alg * alg)107 int crypto_unregister_pcomp(struct pcomp_alg *alg)
108 {
109 return crypto_unregister_alg(&alg->base);
110 }
111 EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
112
113 MODULE_LICENSE("GPL");
114 MODULE_DESCRIPTION("Partial (de)compression type");
115 MODULE_AUTHOR("Sony Corporation");
116