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   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 #if 0
  34 /*
  35  *      crypto_free_tfm - Free crypto transform
  36  *      @tfm: Transform to free
  37  *
  38  *      crypto_free_tfm() frees up the transform and any associated resources,
  39  *      then drops the refcount on the associated algorithm.
  40  */
  41 void crypto_free_tfm(struct crypto_tfm *tfm)
  42 {
  43         struct crypto_alg *alg;
  44         int size;
  45
  46         if (unlikely(!tfm))
  47                 return;
  48
  49         alg = tfm->__crt_alg;
  50         size = sizeof(*tfm) + alg->cra_ctxsize;
  51
  52         if (alg->cra_exit)
  53                 alg->cra_exit(tfm);
  54         crypto_exit_ops(tfm);
  55         crypto_mod_put(alg);
  56         memset(tfm, 0, size);
  57         kfree(tfm);
  58 }
  59
  60 #endif
  61 #if 1
  62  struct crypto_tfm *crypto_alloc_tfm(const char *name, u32 flags)
  63 {
  64         struct crypto_tfm *tfm = NULL;
  65         int err;
  66         printk("call crypto_alloc_tfm!!!\n");
  67         do {
  68                 struct crypto_alg *alg;
  69
  70                 alg = crypto_alg_mod_lookup(name, 0, CRYPTO_ALG_ASYNC);
  71                 err = PTR_ERR(alg);
  72                 if (IS_ERR(alg))
  73                         continue;
  74
  75                 tfm = __crypto_alloc_tfm(alg, flags);
  76                 err = 0;
  77                 if (IS_ERR(tfm)) {
  78                         crypto_mod_put(alg);
  79                         err = PTR_ERR(tfm);
  80                         tfm = NULL;
  81                 }
  82         } while (err == -EAGAIN && !signal_pending(current));
  83
  84         return tfm;
  85 }
  86 #endif
  87 //EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
  88 //EXPORT_SYMBOL_GPL(crypto_free_tfm);
  89
  90