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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 | struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); | |
80 | void crypto_larval_kill(struct crypto_alg *alg); | |
81 | struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); | |
82 | void crypto_alg_tested(const char *name, int err); | |
83 | ||
84 | void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, | |
85 | struct crypto_alg *nalg); | |
86 | void crypto_remove_final(struct list_head *list); | |
87 | void crypto_shoot_alg(struct crypto_alg *alg); | |
88 | struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, | |
89 | u32 mask); | |
90 | void *crypto_create_tfm(struct crypto_alg *alg, | |
91 | const struct crypto_type *frontend); | |
92 | struct crypto_alg *crypto_find_alg(const char *alg_name, | |
93 | const struct crypto_type *frontend, | |
94 | u32 type, u32 mask); | |
95 | void *crypto_alloc_tfm(const char *alg_name, | |
96 | const struct crypto_type *frontend, u32 type, u32 mask); | |
97 | ||
98 | int crypto_register_notifier(struct notifier_block *nb); | |
99 | int crypto_unregister_notifier(struct notifier_block *nb); | |
100 | int crypto_probing_notify(unsigned long val, void *v); | |
101 | ||
102 | unsigned int crypto_alg_extsize(struct crypto_alg *alg); | |
103 | ||
104 | int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, | |
105 | u32 type, u32 mask); | |
106 | ||
107 | static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) | |
108 | { | |
109 | atomic_inc(&alg->cra_refcnt); | |
110 | return alg; | |
111 | } | |
112 | ||
113 | static inline void crypto_alg_put(struct crypto_alg *alg) | |
114 | { | |
115 | if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) | |
116 | alg->cra_destroy(alg); | |
117 | } | |
118 | ||
119 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) | |
120 | { | |
121 | return try_module_get(tmpl->module); | |
122 | } | |
123 | ||
124 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) | |
125 | { | |
126 | module_put(tmpl->module); | |
127 | } | |
128 | ||
129 | static inline int crypto_is_larval(struct crypto_alg *alg) | |
130 | { | |
131 | return alg->cra_flags & CRYPTO_ALG_LARVAL; | |
132 | } | |
133 | ||
134 | static inline int crypto_is_dead(struct crypto_alg *alg) | |
135 | { | |
136 | return alg->cra_flags & CRYPTO_ALG_DEAD; | |
137 | } | |
138 | ||
139 | static inline int crypto_is_moribund(struct crypto_alg *alg) | |
140 | { | |
141 | return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); | |
142 | } | |
143 | ||
144 | static inline void crypto_notify(unsigned long val, void *v) | |
145 | { | |
146 | blocking_notifier_call_chain(&crypto_chain, val, v); | |
147 | } | |
148 | ||
149 | #endif /* _CRYPTO_INTERNAL_H */ | |
150 |