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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 | |
28 | #include <crypto/compress.h> |
29 | #include <crypto/internal/compress.h> |
30 | |
31 | #include "internal.h" |
32 | |
33 | |
34 | static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) |
35 | { |
36 | return 0; |
37 | } |
38 | |
39 | static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg) |
40 | { |
41 | return alg->cra_ctxsize; |
42 | } |
43 | |
44 | static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm) |
45 | { |
46 | return 0; |
47 | } |
48 | |
49 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) |
50 | __attribute__ ((unused)); |
51 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) |
52 | { |
53 | seq_printf(m, "type : pcomp\n"); |
54 | } |
55 | |
56 | static const struct crypto_type crypto_pcomp_type = { |
57 | .extsize = crypto_pcomp_extsize, |
58 | .init = crypto_pcomp_init, |
59 | .init_tfm = crypto_pcomp_init_tfm, |
60 | #ifdef CONFIG_PROC_FS |
61 | .show = crypto_pcomp_show, |
62 | #endif |
63 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
64 | .maskset = CRYPTO_ALG_TYPE_MASK, |
65 | .type = CRYPTO_ALG_TYPE_PCOMPRESS, |
66 | .tfmsize = offsetof(struct crypto_pcomp, base), |
67 | }; |
68 | |
69 | struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, |
70 | u32 mask) |
71 | { |
72 | return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask); |
73 | } |
74 | EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); |
75 | |
76 | int crypto_register_pcomp(struct pcomp_alg *alg) |
77 | { |
78 | struct crypto_alg *base = &alg->base; |
79 | |
80 | base->cra_type = &crypto_pcomp_type; |
81 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
82 | base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS; |
83 | |
84 | return crypto_register_alg(base); |
85 | } |
86 | EXPORT_SYMBOL_GPL(crypto_register_pcomp); |
87 | |
88 | int crypto_unregister_pcomp(struct pcomp_alg *alg) |
89 | { |
90 | return crypto_unregister_alg(&alg->base); |
91 | } |
92 | EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); |
93 | |
94 | MODULE_LICENSE("GPL"); |
95 | MODULE_DESCRIPTION("Partial (de)compression type"); |
96 | MODULE_AUTHOR("Sony Corporation"); |
97 |
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