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
91
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