Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Cryptographic API.
3 *
4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 */
13#ifndef _CRYPTO_INTERNAL_H
14#define _CRYPTO_INTERNAL_H
15#include <linux/crypto.h>
16#include <linux/mm.h>
17#include <linux/highmem.h>
18#include <linux/interrupt.h>
19#include <linux/init.h>
20#include <linux/list.h>
21#include <linux/kernel.h>
22#include <linux/rwsem.h>
23#include <linux/slab.h>
24#include <asm/kmap_types.h>
25
26extern struct list_head crypto_alg_list;
27extern struct rw_semaphore crypto_alg_sem;
28
29extern enum km_type crypto_km_types[];
30
31static inline enum km_type crypto_kmap_type(int out)
32{
33 return crypto_km_types[(in_softirq() ? 2 : 0) + out];
34}
35
36static inline void *crypto_kmap(struct page *page, int out)
37{
38 return kmap_atomic(page, crypto_kmap_type(out));
39}
40
41static inline void crypto_kunmap(void *vaddr, int out)
42{
43 kunmap_atomic(vaddr, crypto_kmap_type(out));
44}
45
46static inline void crypto_yield(struct crypto_tfm *tfm)
47{
48 if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
49 cond_resched();
50}
51
52#ifdef CONFIG_CRYPTO_HMAC
53int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
54void crypto_free_hmac_block(struct crypto_tfm *tfm);
55#else
56static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
57{
58 return 0;
59}
60
61static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
62{ }
63#endif
64
65#ifdef CONFIG_PROC_FS
66void __init crypto_init_proc(void);
67#else
68static inline void crypto_init_proc(void)
69{ }
70#endif
71
72static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
73 int flags)
74{
75 return alg->cra_ctxsize;
76}
77
78static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
79 int flags)
80{
81 unsigned int len = alg->cra_ctxsize;
82
83 switch (flags & CRYPTO_TFM_MODE_MASK) {
84 case CRYPTO_TFM_MODE_CBC:
85 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
86 len += alg->cra_blocksize;
87 break;
88 }
89
90 return len;
91}
92
93static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
94 int flags)
95{
96 return alg->cra_ctxsize;
97}
98
99int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
100int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
101int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
102
103int crypto_init_digest_ops(struct crypto_tfm *tfm);
104int crypto_init_cipher_ops(struct crypto_tfm *tfm);
105int crypto_init_compress_ops(struct crypto_tfm *tfm);
106
107void crypto_exit_digest_ops(struct crypto_tfm *tfm);
108void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
109void crypto_exit_compress_ops(struct crypto_tfm *tfm);
110
111#endif /* _CRYPTO_INTERNAL_H */
112