path: root/crypto/internal.h (plain)
blob: 7eefcdb00227740e39a22d61515d016b4f36caa0

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. */
30	enum {
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
38	struct crypto_instance;
39	struct crypto_template;
40
41	struct crypto_larval {
42	struct crypto_alg alg;
43	struct crypto_alg *adult;
44	struct completion completion;
45	u32 mask;
46	};
47
48	extern struct list_head crypto_alg_list;
49	extern struct rw_semaphore crypto_alg_sem;
50	extern struct blocking_notifier_head crypto_chain;
51
52	#ifdef CONFIG_PROC_FS
53	void __init crypto_init_proc(void);
54	void __exit crypto_exit_proc(void);
55	#else
56	static inline void crypto_init_proc(void)
57	{ }
58	static inline void crypto_exit_proc(void)
59	{ }
60	#endif
61
62	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
63	{
64	return alg->cra_ctxsize;
65	}
66
67	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
68	{
69	return alg->cra_ctxsize;
70	}
71
72	struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
73	struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
74	struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
75
76	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
77	int crypto_init_compress_ops(struct crypto_tfm *tfm);
78
79	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
80	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
81
82	struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
83	void crypto_larval_kill(struct crypto_alg *alg);
84	struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
85	void crypto_alg_tested(const char *name, int err);
86
87	void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
88	struct crypto_alg *nalg);
89	void crypto_remove_final(struct list_head *list);
90	void crypto_shoot_alg(struct crypto_alg *alg);
91	struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
92	u32 mask);
93	void *crypto_create_tfm(struct crypto_alg *alg,
94	const struct crypto_type *frontend);
95	struct crypto_alg *crypto_find_alg(const char *alg_name,
96	const struct crypto_type *frontend,
97	u32 type, u32 mask);
98	void *crypto_alloc_tfm(const char *alg_name,
99	const struct crypto_type *frontend, u32 type, u32 mask);
100
101	int crypto_register_notifier(struct notifier_block *nb);
102	int crypto_unregister_notifier(struct notifier_block *nb);
103	int crypto_probing_notify(unsigned long val, void *v);
104
105	unsigned int crypto_alg_extsize(struct crypto_alg *alg);
106
107	int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
108	u32 type, u32 mask);
109
110	static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
111	{
112	atomic_inc(&alg->cra_refcnt);
113	return alg;
114	}
115
116	static inline void crypto_alg_put(struct crypto_alg *alg)
117	{
118	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
119	alg->cra_destroy(alg);
120	}
121
122	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
123	{
124	return try_module_get(tmpl->module);
125	}
126
127	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
128	{
129	module_put(tmpl->module);
130	}
131
132	static inline int crypto_is_larval(struct crypto_alg *alg)
133	{
134	return alg->cra_flags & CRYPTO_ALG_LARVAL;
135	}
136
137	static inline int crypto_is_dead(struct crypto_alg *alg)
138	{
139	return alg->cra_flags & CRYPTO_ALG_DEAD;
140	}
141
142	static inline int crypto_is_moribund(struct crypto_alg *alg)
143	{
144	return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
145	}
146
147	static inline void crypto_notify(unsigned long val, void *v)
148	{
149	blocking_notifier_call_chain(&crypto_chain, val, v);
150	}
151
152	#endif /* _CRYPTO_INTERNAL_H */
153
154