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_extsize(struct crypto_alg * alg)41 static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)
42 {
43 return alg->cra_ctxsize;
44 }
45
crypto_pcomp_init_tfm(struct crypto_tfm * tfm)46 static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
47 {
48 return 0;
49 }
50
51 #ifdef CONFIG_NET
crypto_pcomp_report(struct sk_buff * skb,struct crypto_alg * alg)52 static 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 NLA_PUT(skb, CRYPTOCFGA_REPORT_COMPRESS,
59 sizeof(struct crypto_report_comp), &rpcomp);
60
61 return 0;
62
63 nla_put_failure:
64 return -EMSGSIZE;
65 }
66 #else
crypto_pcomp_report(struct sk_buff * skb,struct crypto_alg * alg)67 static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
68 {
69 return -ENOSYS;
70 }
71 #endif
72
73 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
74 __attribute__ ((unused));
crypto_pcomp_show(struct seq_file * m,struct crypto_alg * alg)75 static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
76 {
77 seq_printf(m, "type : pcomp\n");
78 }
79
80 static 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
crypto_alloc_pcomp(const char * alg_name,u32 type,u32 mask)94 struct 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 }
99 EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
100
crypto_register_pcomp(struct pcomp_alg * alg)101 int 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 }
111 EXPORT_SYMBOL_GPL(crypto_register_pcomp);
112
crypto_unregister_pcomp(struct pcomp_alg * alg)113 int crypto_unregister_pcomp(struct pcomp_alg *alg)
114 {
115 return crypto_unregister_alg(&alg->base);
116 }
117 EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
118
119 MODULE_LICENSE("GPL");
120 MODULE_DESCRIPTION("Partial (de)compression type");
121 MODULE_AUTHOR("Sony Corporation");
122