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-rw-r--r--crypto/compress.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/crypto/compress.c b/crypto/compress.c
new file mode 100644
index 000000000000..eb36d9364da3
--- /dev/null
+++ b/crypto/compress.c
@@ -0,0 +1,63 @@
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}