crypto_compat.h revision e406322b4b963e622f41d76193d8ca9e5435adb8 
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#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 */
41void 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