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
16#include <crypto/algapi.h>
17#include <linux/completion.h>
18#include <linux/mm.h>
19#include <linux/highmem.h>
20#include <linux/interrupt.h>
21#include <linux/init.h>
22#include <linux/list.h>
23#include <linux/module.h>
24#include <linux/kernel.h>
25#include <linux/notifier.h>
26#include <linux/rwsem.h>
27#include <linux/slab.h>
28
29/* Crypto notification events. */
30enum {
31 CRYPTO_MSG_ALG_REQUEST,
32 CRYPTO_MSG_ALG_REGISTER,
33 CRYPTO_MSG_ALG_UNREGISTER,
34 CRYPTO_MSG_TMPL_REGISTER,
35 CRYPTO_MSG_TMPL_UNREGISTER,
36};
37
38struct crypto_instance;
39struct crypto_template;
40
41struct crypto_larval {
42 struct crypto_alg alg;
43 struct crypto_alg *adult;
44 struct completion completion;
45 u32 mask;
46};
47
48extern struct list_head crypto_alg_list;
49extern struct rw_semaphore crypto_alg_sem;
50extern struct blocking_notifier_head crypto_chain;
51
52#ifdef CONFIG_PROC_FS
53void __init crypto_init_proc(void);
54void __exit crypto_exit_proc(void);
55#else
56static inline void crypto_init_proc(void)
57{ }
58static inline void crypto_exit_proc(void)
59{ }
60#endif
61
62static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
63{
64 unsigned int len = alg->cra_ctxsize;
65
66 if (alg->cra_alignmask) {
67 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
68 len += alg->cra_digest.dia_digestsize;
69 }
70
71 return len;
72}
73
74static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
75{
76 return alg->cra_ctxsize;
77}
78
79static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
80{
81 return alg->cra_ctxsize;
82}
83
84struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
85struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
86struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
87
88int crypto_init_digest_ops(struct crypto_tfm *tfm);
89int crypto_init_cipher_ops(struct crypto_tfm *tfm);
90int crypto_init_compress_ops(struct crypto_tfm *tfm);
91
92void crypto_exit_digest_ops(struct crypto_tfm *tfm);
93void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
94void crypto_exit_compress_ops(struct crypto_tfm *tfm);
95
96void crypto_larval_kill(struct crypto_alg *alg);
97struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
98void crypto_larval_error(const char *name, u32 type, u32 mask);
99
100void crypto_shoot_alg(struct crypto_alg *alg);
101struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
102 u32 mask);
103
104int crypto_register_instance(struct crypto_template *tmpl,
105 struct crypto_instance *inst);
106
107int crypto_register_notifier(struct notifier_block *nb);
108int crypto_unregister_notifier(struct notifier_block *nb);
109
110static inline void crypto_alg_put(struct crypto_alg *alg)
111{
112 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
113 alg->cra_destroy(alg);
114}
115
116static inline int crypto_tmpl_get(struct crypto_template *tmpl)
117{
118 return try_module_get(tmpl->module);
119}
120
121static inline void crypto_tmpl_put(struct crypto_template *tmpl)
122{
123 module_put(tmpl->module);
124}
125
126static inline int crypto_is_larval(struct crypto_alg *alg)
127{
128 return alg->cra_flags & CRYPTO_ALG_LARVAL;
129}
130
131static inline int crypto_is_dead(struct crypto_alg *alg)
132{
133 return alg->cra_flags & CRYPTO_ALG_DEAD;
134}
135
136static inline int crypto_is_moribund(struct crypto_alg *alg)
137{
138 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
139}
140
141static inline int crypto_notify(unsigned long val, void *v)
142{
143 return blocking_notifier_call_chain(&crypto_chain, val, v);
144}
145
146#endif /* _CRYPTO_INTERNAL_H */
147