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/crypto/compress.c

https://bitbucket.org/evzijst/gittest
C | 63 lines | 42 code | 8 blank | 13 comment | 1 complexity | 139e0274fecdbed167c9b27b4b65cbaa MD5 | raw file
 1/*
 2 * Cryptographic API.
 3 *
 4 * Compression operations.
 5 *
 6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 7 *
 8 * This program is free software; you can redistribute it and/or modify it
 9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option) 
11 * any later version.
12 *
13 */
14#include <linux/types.h>
15#include <linux/crypto.h>
16#include <linux/errno.h>
17#include <asm/scatterlist.h>
18#include <linux/string.h>
19#include "internal.h"
20
21static int crypto_compress(struct crypto_tfm *tfm,
22                            const u8 *src, unsigned int slen,
23                            u8 *dst, unsigned int *dlen)
24{
25	return tfm->__crt_alg->cra_compress.coa_compress(crypto_tfm_ctx(tfm),
26	                                                 src, slen, dst,
27	                                                 dlen);
28}
29
30static int crypto_decompress(struct crypto_tfm *tfm,
31                             const u8 *src, unsigned int slen,
32                             u8 *dst, unsigned int *dlen)
33{
34	return tfm->__crt_alg->cra_compress.coa_decompress(crypto_tfm_ctx(tfm),
35	                                                   src, slen, dst,
36	                                                   dlen);
37}
38
39int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
40{
41	return flags ? -EINVAL : 0;
42}
43
44int crypto_init_compress_ops(struct crypto_tfm *tfm)
45{
46	int ret = 0;
47	struct compress_tfm *ops = &tfm->crt_compress;
48	
49	ret = tfm->__crt_alg->cra_compress.coa_init(crypto_tfm_ctx(tfm));
50	if (ret)
51		goto out;
52
53	ops->cot_compress = crypto_compress;
54	ops->cot_decompress = crypto_decompress;
55	
56out:
57	return ret;
58}
59
60void crypto_exit_compress_ops(struct crypto_tfm *tfm)
61{
62	tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
63}