release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/rtl8192u/ieee80211/crypto_compat.h

   1 /*
   2  * Header file to maintain compatibility among different kernel versions.
   3  *
   4  * Copyright (c) 2004-2006  <lawrence_wang@realsil.com.cn>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation. See README and COPYING for
   9  * more details.
  10  */
  11
  12 #include <linux/crypto.h>
  13
  14 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
  15                                         struct scatterlist *dst,
  16                                         struct scatterlist *src,
  17                                         unsigned int nbytes)
  18 {
  19         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
  20         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
  21 }
  22
  23
  24 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
  25                                         struct scatterlist *dst,
  26                                         struct scatterlist *src,
  27                                         unsigned int nbytes)
  28 {
  29         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
  30         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
  31 }
  32
  33  struct crypto_tfm *crypto_alloc_tfm(const char *name, u32 flags)
  34 {
  35         struct crypto_tfm *tfm = NULL;
  36         int err;
  37         printk("call crypto_alloc_tfm!!!\n");
  38         do {
  39                 struct crypto_alg *alg;
  40
  41                 alg = crypto_alg_mod_lookup(name, 0, CRYPTO_ALG_ASYNC);
  42                 err = PTR_ERR(alg);
  43                 if (IS_ERR(alg))
  44                         continue;
  45
  46                 tfm = __crypto_alloc_tfm(alg, flags);
  47                 err = 0;
  48                 if (IS_ERR(tfm)) {
  49                         crypto_mod_put(alg);
  50                         err = PTR_ERR(tfm);
  51                         tfm = NULL;
  52                 }
  53         } while (err == -EAGAIN && !signal_pending(current));
  54
  55         return tfm;
  56 }
  57 //EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
  58 //EXPORT_SYMBOL_GPL(crypto_free_tfm);