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 #ifdef CONFIG_CRYPTO_FIPS
30 extern int fips_enabled;
31 #else
32 #define fips_enabled 0
33 #endif
34
35 /* Crypto notification events. */
36 enum {
37 CRYPTO_MSG_ALG_REQUEST,
38 CRYPTO_MSG_ALG_REGISTER,
39 CRYPTO_MSG_ALG_UNREGISTER,
40 CRYPTO_MSG_TMPL_REGISTER,
41 CRYPTO_MSG_TMPL_UNREGISTER,
42 };
43
44 struct crypto_instance;
45 struct crypto_template;
46
47 struct crypto_larval {
48 struct crypto_alg alg;
49 struct crypto_alg *adult;
50 struct completion completion;
51 u32 mask;
52 };
53
54 extern struct list_head crypto_alg_list;
55 extern struct rw_semaphore crypto_alg_sem;
56 extern struct blocking_notifier_head crypto_chain;
57
58 #ifdef CONFIG_PROC_FS
59 void __init crypto_init_proc(void);
60 void __exit crypto_exit_proc(void);
61 #else
62 static inline void crypto_init_proc(void)
63 { }
64 static inline void crypto_exit_proc(void)
65 { }
66 #endif
67
68 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
69 {
70 unsigned int len = alg->cra_ctxsize;
71
72 if (alg->cra_alignmask) {
73 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
74 len += alg->cra_digest.dia_digestsize;
75 }
76
77 return len;
78 }
79
80 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
81 {
82 return alg->cra_ctxsize;
83 }
84
85 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
86 {
87 return alg->cra_ctxsize;
88 }
89
90 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
91 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
92 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
93
94 int crypto_init_digest_ops(struct crypto_tfm *tfm);
95 int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
96 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
97 int crypto_init_compress_ops(struct crypto_tfm *tfm);
98
99 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
100 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
101 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
102
103 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
104 void crypto_larval_kill(struct crypto_alg *alg);
105 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
106 void crypto_larval_error(const char *name, u32 type, u32 mask);
107 void crypto_alg_tested(const char *name, int err);
108
109 void crypto_shoot_alg(struct crypto_alg *alg);
110 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
111 u32 mask);
112 void *crypto_create_tfm(struct crypto_alg *alg,
113 const struct crypto_type *frontend);
114 void *crypto_alloc_tfm(const char *alg_name,
115 const struct crypto_type *frontend, u32 type, u32 mask);
116
117 int crypto_register_instance(struct crypto_template *tmpl,
118 struct crypto_instance *inst);
119
120 int crypto_register_notifier(struct notifier_block *nb);
121 int crypto_unregister_notifier(struct notifier_block *nb);
122 int crypto_probing_notify(unsigned long val, void *v);
123
124 static inline void crypto_alg_put(struct crypto_alg *alg)
125 {
126 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
127 alg->cra_destroy(alg);
128 }
129
130 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
131 {
132 return try_module_get(tmpl->module);
133 }
134
135 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
136 {
137 module_put(tmpl->module);
138 }
139
140 static inline int crypto_is_larval(struct crypto_alg *alg)
141 {
142 return alg->cra_flags & CRYPTO_ALG_LARVAL;
143 }
144
145 static inline int crypto_is_dead(struct crypto_alg *alg)
146 {
147 return alg->cra_flags & CRYPTO_ALG_DEAD;
148 }
149
150 static inline int crypto_is_moribund(struct crypto_alg *alg)
151 {
152 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
153 }
154
155 static inline void crypto_notify(unsigned long val, void *v)
156 {
157 blocking_notifier_call_chain(&crypto_chain, val, v);
158 }
159
160 #endif /* _CRYPTO_INTERNAL_H */
161
162
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