crypto/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 <linux/errno.h>
  17 #include <asm/scatterlist.h>
  18 #include <linux/string.h>
  19 #include "internal.h"
  20
  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(tfm, src, slen, dst,
  26                                                          dlen);
  27 }
  28
  29 static int crypto_decompress(struct crypto_tfm *tfm,
  30                              const u8 *src, unsigned int slen,
  31                              u8 *dst, unsigned int *dlen)
  32 {
  33         return tfm->__crt_alg->cra_compress.coa_decompress(tfm, src, slen, dst,
  34                                                            dlen);
  35 }
  36
  37 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
  38 {
  39         return flags ? -EINVAL : 0;
  40 }
  41
  42 int crypto_init_compress_ops(struct crypto_tfm *tfm)
  43 {
  44         struct compress_tfm *ops = &tfm->crt_compress;
  45
  46         ops->cot_compress = crypto_compress;
  47         ops->cot_decompress = crypto_decompress;
  48
  49         return 0;
  50 }
  51
  52 void crypto_exit_compress_ops(struct crypto_tfm *tfm)
  53 {
  54 }