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
crypto_compress(struct crypto_tfm * tfm,const u8 * src,unsigned int slen,u8 * dst,unsigned int * dlen)21 static 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
crypto_decompress(struct crypto_tfm * tfm,const u8 * src,unsigned int slen,u8 * dst,unsigned int * dlen)30 static 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
crypto_init_compress_flags(struct crypto_tfm * tfm,u32 flags)39 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
40 {
41 return flags ? -EINVAL : 0;
42 }
43
crypto_init_compress_ops(struct crypto_tfm * tfm)44 int 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
56 out:
57 return ret;
58 }
59
crypto_exit_compress_ops(struct crypto_tfm * tfm)60 void crypto_exit_compress_ops(struct crypto_tfm *tfm)
61 {
62 tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
63 }
64