compress.c

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    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(crypto_tfm_ctx(tfm),
   26                                                          src, slen, dst,
   27                                                          dlen);
   28 }
   29 
   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 
   39 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
   40 {
   41         return flags ? -EINVAL : 0;
   42 }
   43 
   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 
   60 void crypto_exit_compress_ops(struct crypto_tfm *tfm)
   61 {
   62         tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
   63 }

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FreeBSD/Linux Kernel Cross Reference sys/crypto/compress.c

FreeBSD/Linux Kernel Cross Reference
sys/crypto/compress.c