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 #include <linux/fips.h>
29
30 /* Crypto notification events. */
31 enum {
32 CRYPTO_MSG_ALG_REQUEST,
33 CRYPTO_MSG_ALG_REGISTER,
34 CRYPTO_MSG_ALG_UNREGISTER,
35 CRYPTO_MSG_TMPL_REGISTER,
36 CRYPTO_MSG_TMPL_UNREGISTER,
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;
45 struct completion completion;
46 u32 mask;
47 };
48
49 extern struct list_head crypto_alg_list;
50 extern struct rw_semaphore crypto_alg_sem;
51 extern struct blocking_notifier_head crypto_chain;
52
53 #ifdef CONFIG_PROC_FS
54 void __init crypto_init_proc(void);
55 void __exit crypto_exit_proc(void);
56 #else
crypto_init_proc(void)57 static inline void crypto_init_proc(void)
58 { }
crypto_exit_proc(void)59 static inline void crypto_exit_proc(void)
60 { }
61 #endif
62
crypto_cipher_ctxsize(struct crypto_alg * alg)63 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
64 {
65 return alg->cra_ctxsize;
66 }
67
crypto_compress_ctxsize(struct crypto_alg * alg)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
102 int crypto_register_notifier(struct notifier_block *nb);
103 int crypto_unregister_notifier(struct notifier_block *nb);
104 int crypto_probing_notify(unsigned long val, void *v);
105
crypto_alg_get(struct crypto_alg * alg)106 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
107 {
108 atomic_inc(&alg->cra_refcnt);
109 return alg;
110 }
111
crypto_alg_put(struct crypto_alg * alg)112 static inline void crypto_alg_put(struct crypto_alg *alg)
113 {
114 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
115 alg->cra_destroy(alg);
116 }
117
crypto_tmpl_get(struct crypto_template * tmpl)118 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
119 {
120 return try_module_get(tmpl->module);
121 }
122
crypto_tmpl_put(struct crypto_template * tmpl)123 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
124 {
125 module_put(tmpl->module);
126 }
127
crypto_is_larval(struct crypto_alg * alg)128 static inline int crypto_is_larval(struct crypto_alg *alg)
129 {
130 return alg->cra_flags & CRYPTO_ALG_LARVAL;
131 }
132
crypto_is_dead(struct crypto_alg * alg)133 static inline int crypto_is_dead(struct crypto_alg *alg)
134 {
135 return alg->cra_flags & CRYPTO_ALG_DEAD;
136 }
137
crypto_is_moribund(struct crypto_alg * alg)138 static inline int crypto_is_moribund(struct crypto_alg *alg)
139 {
140 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
141 }
142
crypto_notify(unsigned long val,void * v)143 static inline void crypto_notify(unsigned long val, void *v)
144 {
145 blocking_notifier_call_chain(&crypto_chain, val, v);
146 }
147
148 #endif /* _CRYPTO_INTERNAL_H */
149
150