LXR linux/drivers/staging/rtl8192u/ieee80211/crypto

   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
  14static 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
  24static 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);
  59