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internal.h
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1 /*
2  * Cryptographic API.
3  *
4  * Copyright (c) 2002 James Morris <[email protected]>
5  * Copyright (c) 2005 Herbert Xu <[email protected]>
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 #include <linux/fips.h>
29 
30 /* Crypto notification events. */
31 enum {
37 };
38 
39 struct crypto_instance;
40 struct crypto_template;
41 
42 struct crypto_larval {
43  struct crypto_alg alg;
44  struct crypto_alg *adult;
47 };
48 
49 extern struct list_head crypto_alg_list;
50 extern struct rw_semaphore crypto_alg_sem;
52 
53 #ifdef CONFIG_PROC_FS
54 void __init crypto_init_proc(void);
55 void __exit crypto_exit_proc(void);
56 #else
57 static inline void crypto_init_proc(void)
58 { }
59 static inline void crypto_exit_proc(void)
60 { }
61 #endif
62 
63 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
64 {
65  return alg->cra_ctxsize;
66 }
67 
68 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
69 {
70  return alg->cra_ctxsize;
71 }
72 
73 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
74 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
75 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
76 
77 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
78 int crypto_init_compress_ops(struct crypto_tfm *tfm);
79 
80 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
81 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
82 
83 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
84 void crypto_larval_kill(struct crypto_alg *alg);
85 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
86 void crypto_alg_tested(const char *name, int err);
87 
88 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
89  struct crypto_alg *nalg);
90 void crypto_remove_final(struct list_head *list);
91 void crypto_shoot_alg(struct crypto_alg *alg);
92 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
93  u32 mask);
94 void *crypto_create_tfm(struct crypto_alg *alg,
95  const struct crypto_type *frontend);
96 struct crypto_alg *crypto_find_alg(const char *alg_name,
97  const struct crypto_type *frontend,
98  u32 type, u32 mask);
99 void *crypto_alloc_tfm(const char *alg_name,
100  const struct crypto_type *frontend, u32 type, u32 mask);
101 
104 int crypto_probing_notify(unsigned long val, void *v);
105 
106 static inline void crypto_alg_put(struct crypto_alg *alg)
107 {
108  if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
109  alg->cra_destroy(alg);
110 }
111 
112 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
113 {
114  return try_module_get(tmpl->module);
115 }
116 
117 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
118 {
119  module_put(tmpl->module);
120 }
121 
122 static inline int crypto_is_larval(struct crypto_alg *alg)
123 {
124  return alg->cra_flags & CRYPTO_ALG_LARVAL;
125 }
126 
127 static inline int crypto_is_dead(struct crypto_alg *alg)
128 {
129  return alg->cra_flags & CRYPTO_ALG_DEAD;
130 }
131 
132 static inline int crypto_is_moribund(struct crypto_alg *alg)
133 {
134  return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
135 }
136 
137 static inline void crypto_notify(unsigned long val, void *v)
138 {
139  blocking_notifier_call_chain(&crypto_chain, val, v);
140 }
141 
142 #endif /* _CRYPTO_INTERNAL_H */
143