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 };
34
35 struct crypto_instance;
36 struct crypto_template;
37
38 struct crypto_larval {
39 struct crypto_alg alg;
40 struct crypto_alg *adult;
41 struct completion completion;
42 u32 mask;
43 };
44
45 extern struct list_head crypto_alg_list;
46 extern struct rw_semaphore crypto_alg_sem;
47 extern struct blocking_notifier_head crypto_chain;
48
49 #ifdef CONFIG_PROC_FS
50 void __init crypto_init_proc(void);
51 void __exit crypto_exit_proc(void);
52 #else
crypto_init_proc(void)53 static inline void crypto_init_proc(void)
54 { }
crypto_exit_proc(void)55 static inline void crypto_exit_proc(void)
56 { }
57 #endif
58
crypto_cipher_ctxsize(struct crypto_alg * alg)59 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
60 {
61 return alg->cra_ctxsize;
62 }
63
crypto_compress_ctxsize(struct crypto_alg * alg)64 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
65 {
66 return alg->cra_ctxsize;
67 }
68
69 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
70 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
71
72 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
73 int crypto_init_compress_ops(struct crypto_tfm *tfm);
74
75 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
76 void crypto_larval_kill(struct crypto_alg *alg);
77 void crypto_alg_tested(const char *name, int err);
78
79 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
80 struct crypto_alg *nalg);
81 void crypto_remove_final(struct list_head *list);
82 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
83 u32 mask);
84 void *crypto_create_tfm(struct crypto_alg *alg,
85 const struct crypto_type *frontend);
86 struct crypto_alg *crypto_find_alg(const char *alg_name,
87 const struct crypto_type *frontend,
88 u32 type, u32 mask);
89 void *crypto_alloc_tfm(const char *alg_name,
90 const struct crypto_type *frontend, u32 type, u32 mask);
91
92 int crypto_register_notifier(struct notifier_block *nb);
93 int crypto_unregister_notifier(struct notifier_block *nb);
94 int crypto_probing_notify(unsigned long val, void *v);
95
96 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
97
98 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
99 u32 type, u32 mask);
100
crypto_alg_get(struct crypto_alg * alg)101 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
102 {
103 refcount_inc(&alg->cra_refcnt);
104 return alg;
105 }
106
crypto_alg_put(struct crypto_alg * alg)107 static inline void crypto_alg_put(struct crypto_alg *alg)
108 {
109 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
110 alg->cra_destroy(alg);
111 }
112
crypto_tmpl_get(struct crypto_template * tmpl)113 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
114 {
115 return try_module_get(tmpl->module);
116 }
117
crypto_tmpl_put(struct crypto_template * tmpl)118 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
119 {
120 module_put(tmpl->module);
121 }
122
crypto_is_larval(struct crypto_alg * alg)123 static inline int crypto_is_larval(struct crypto_alg *alg)
124 {
125 return alg->cra_flags & CRYPTO_ALG_LARVAL;
126 }
127
crypto_is_dead(struct crypto_alg * alg)128 static inline int crypto_is_dead(struct crypto_alg *alg)
129 {
130 return alg->cra_flags & CRYPTO_ALG_DEAD;
131 }
132
crypto_is_moribund(struct crypto_alg * alg)133 static inline int crypto_is_moribund(struct crypto_alg *alg)
134 {
135 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
136 }
137
crypto_notify(unsigned long val,void * v)138 static inline void crypto_notify(unsigned long val, void *v)
139 {
140 blocking_notifier_call_chain(&crypto_chain, val, v);
141 }
142
143 #endif /* _CRYPTO_INTERNAL_H */
144
145