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a1d2f095 GU |
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> | |
a55465dc SK |
27 | #include <linux/cryptouser.h> |
28 | #include <net/netlink.h> | |
a1d2f095 GU |
29 | |
30 | #include <crypto/compress.h> | |
2f6ceb79 | 31 | #include <crypto/internal/compress.h> |
a1d2f095 GU |
32 | |
33 | #include "internal.h" | |
34 | ||
35 | ||
36 | static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) | |
37 | { | |
38 | return 0; | |
39 | } | |
40 | ||
2ca33da1 | 41 | static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg) |
a1d2f095 GU |
42 | { |
43 | return alg->cra_ctxsize; | |
44 | } | |
45 | ||
2ca33da1 | 46 | static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm) |
a1d2f095 GU |
47 | { |
48 | return 0; | |
49 | } | |
50 | ||
a55465dc SK |
51 | static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg) |
52 | { | |
53 | struct crypto_report_comp rpcomp; | |
54 | ||
55 | snprintf(rpcomp.type, CRYPTO_MAX_ALG_NAME, "%s", "pcomp"); | |
56 | ||
57 | NLA_PUT(skb, CRYPTOCFGA_REPORT_COMPRESS, | |
58 | sizeof(struct crypto_report_comp), &rpcomp); | |
59 | ||
60 | return 0; | |
61 | ||
62 | nla_put_failure: | |
63 | return -EMSGSIZE; | |
64 | } | |
65 | ||
a1d2f095 GU |
66 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) |
67 | __attribute__ ((unused)); | |
68 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) | |
69 | { | |
70 | seq_printf(m, "type : pcomp\n"); | |
71 | } | |
72 | ||
73 | static const struct crypto_type crypto_pcomp_type = { | |
74 | .extsize = crypto_pcomp_extsize, | |
75 | .init = crypto_pcomp_init, | |
76 | .init_tfm = crypto_pcomp_init_tfm, | |
77 | #ifdef CONFIG_PROC_FS | |
78 | .show = crypto_pcomp_show, | |
79 | #endif | |
a55465dc | 80 | .report = crypto_pcomp_report, |
a1d2f095 GU |
81 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
82 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
83 | .type = CRYPTO_ALG_TYPE_PCOMPRESS, | |
84 | .tfmsize = offsetof(struct crypto_pcomp, base), | |
85 | }; | |
86 | ||
87 | struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, | |
88 | u32 mask) | |
89 | { | |
90 | return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask); | |
91 | } | |
92 | EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); | |
93 | ||
94 | int crypto_register_pcomp(struct pcomp_alg *alg) | |
95 | { | |
96 | struct crypto_alg *base = &alg->base; | |
97 | ||
98 | base->cra_type = &crypto_pcomp_type; | |
99 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
100 | base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS; | |
101 | ||
102 | return crypto_register_alg(base); | |
103 | } | |
104 | EXPORT_SYMBOL_GPL(crypto_register_pcomp); | |
105 | ||
106 | int crypto_unregister_pcomp(struct pcomp_alg *alg) | |
107 | { | |
108 | return crypto_unregister_alg(&alg->base); | |
109 | } | |
110 | EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); | |
111 | ||
112 | MODULE_LICENSE("GPL"); | |
113 | MODULE_DESCRIPTION("Partial (de)compression type"); | |
114 | MODULE_AUTHOR("Sony Corporation"); |