release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/rtl8192u/ieee80211/compress.c

   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 "rtl_crypto.h"
  17 #include <linux/errno.h>
  18 #include <asm/scatterlist.h>
  19 #include <linux/string.h>
  20 #include "internal.h"
  21
  22 static int crypto_compress(struct crypto_tfm *tfm,
  23                             const u8 *src, unsigned int slen,
  24                             u8 *dst, unsigned int *dlen)
  25 {
  26         return tfm->__crt_alg->cra_compress.coa_compress(crypto_tfm_ctx(tfm),
  27                                                          src, slen, dst,
  28                                                          dlen);
  29 }
  30
  31 static int crypto_decompress(struct crypto_tfm *tfm,
  32                              const u8 *src, unsigned int slen,
  33                              u8 *dst, unsigned int *dlen)
  34 {
  35         return tfm->__crt_alg->cra_compress.coa_decompress(crypto_tfm_ctx(tfm),
  36                                                            src, slen, dst,
  37                                                            dlen);
  38 }
  39
  40 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
  41 {
  42         return flags ? -EINVAL : 0;
  43 }
  44
  45 int crypto_init_compress_ops(struct crypto_tfm *tfm)
  46 {
  47         int ret = 0;
  48         struct compress_tfm *ops = &tfm->crt_compress;
  49
  50         ret = tfm->__crt_alg->cra_compress.coa_init(crypto_tfm_ctx(tfm));
  51         if (ret)
  52                 goto out;
  53
  54         ops->cot_compress = crypto_compress;
  55         ops->cot_decompress = crypto_decompress;
  56
  57 out:
  58         return ret;
  59 }
  60
  61 void crypto_exit_compress_ops(struct crypto_tfm *tfm)
  62 {
  63         tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
  64 }