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
34static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
35{
36	return 0;
37}
38
39static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)
40{
41	return alg->cra_ctxsize;
42}
43
44static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
45{
46	return 0;
47}
48
49static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
50	__attribute__ ((unused));
51static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
52{
53	seq_printf(m, "type         : pcomp\n");
54}
55
56static 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
69struct 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}
74EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
75
76int 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}
86EXPORT_SYMBOL_GPL(crypto_register_pcomp);
87
88int crypto_unregister_pcomp(struct pcomp_alg *alg)
89{
90	return crypto_unregister_alg(&alg->base);
91}
92EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
93
94MODULE_LICENSE("GPL");
95MODULE_DESCRIPTION("Partial (de)compression type");
96MODULE_AUTHOR("Sony Corporation");
97