Root/crypto/internal.h

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. */
31enum {
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
39struct crypto_instance;
40struct crypto_template;
41
42struct crypto_larval {
43    struct crypto_alg alg;
44    struct crypto_alg *adult;
45    struct completion completion;
46    u32 mask;
47};
48
49extern struct list_head crypto_alg_list;
50extern struct rw_semaphore crypto_alg_sem;
51extern struct blocking_notifier_head crypto_chain;
52
53#ifdef CONFIG_PROC_FS
54void __init crypto_init_proc(void);
55void __exit crypto_exit_proc(void);
56#else
57static inline void crypto_init_proc(void)
58{ }
59static inline void crypto_exit_proc(void)
60{ }
61#endif
62
63static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
64{
65    return alg->cra_ctxsize;
66}
67
68static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
69{
70    return alg->cra_ctxsize;
71}
72
73struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
74struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
75struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
76
77int crypto_init_cipher_ops(struct crypto_tfm *tfm);
78int crypto_init_compress_ops(struct crypto_tfm *tfm);
79
80void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
81void crypto_exit_compress_ops(struct crypto_tfm *tfm);
82
83struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
84void crypto_larval_kill(struct crypto_alg *alg);
85struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
86void crypto_alg_tested(const char *name, int err);
87
88void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
89              struct crypto_alg *nalg);
90void crypto_remove_final(struct list_head *list);
91void crypto_shoot_alg(struct crypto_alg *alg);
92struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
93                      u32 mask);
94void *crypto_create_tfm(struct crypto_alg *alg,
95            const struct crypto_type *frontend);
96struct crypto_alg *crypto_find_alg(const char *alg_name,
97                   const struct crypto_type *frontend,
98                   u32 type, u32 mask);
99void *crypto_alloc_tfm(const char *alg_name,
100               const struct crypto_type *frontend, u32 type, u32 mask);
101
102int crypto_register_notifier(struct notifier_block *nb);
103int crypto_unregister_notifier(struct notifier_block *nb);
104int crypto_probing_notify(unsigned long val, void *v);
105
106static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
107{
108    atomic_inc(&alg->cra_refcnt);
109    return alg;
110}
111
112static 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
118static inline int crypto_tmpl_get(struct crypto_template *tmpl)
119{
120    return try_module_get(tmpl->module);
121}
122
123static inline void crypto_tmpl_put(struct crypto_template *tmpl)
124{
125    module_put(tmpl->module);
126}
127
128static inline int crypto_is_larval(struct crypto_alg *alg)
129{
130    return alg->cra_flags & CRYPTO_ALG_LARVAL;
131}
132
133static inline int crypto_is_dead(struct crypto_alg *alg)
134{
135    return alg->cra_flags & CRYPTO_ALG_DEAD;
136}
137
138static inline int crypto_is_moribund(struct crypto_alg *alg)
139{
140    return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
141}
142
143static 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

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