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1/*
2 * Cryptographic API.
3 *
4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b 5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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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
269ab459 9 * Software Foundation; either version 2 of the License, or (at your option)
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10 * any later version.
11 *
12 */
13#ifndef _CRYPTO_INTERNAL_H
14#define _CRYPTO_INTERNAL_H
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15
16#include <crypto/algapi.h>
2825982d 17#include <linux/completion.h>
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18#include <linux/mm.h>
19#include <linux/highmem.h>
20#include <linux/interrupt.h>
21#include <linux/init.h>
5cb1454b 22#include <linux/list.h>
4cc7720c 23#include <linux/module.h>
fbdae9f3 24#include <linux/kernel.h>
2825982d 25#include <linux/notifier.h>
5cb1454b 26#include <linux/rwsem.h>
64baf3cf 27#include <linux/slab.h>
ccb778e1 28
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29/* Crypto notification events. */
30enum {
31 CRYPTO_MSG_ALG_REQUEST,
32 CRYPTO_MSG_ALG_REGISTER,
33 CRYPTO_MSG_ALG_UNREGISTER,
34 CRYPTO_MSG_TMPL_REGISTER,
35 CRYPTO_MSG_TMPL_UNREGISTER,
36};
37
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38struct crypto_instance;
39struct crypto_template;
40
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41struct crypto_larval {
42 struct crypto_alg alg;
43 struct crypto_alg *adult;
44 struct completion completion;
492e2b63 45 u32 mask;
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46};
47
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48extern struct list_head crypto_alg_list;
49extern struct rw_semaphore crypto_alg_sem;
2825982d 50extern struct blocking_notifier_head crypto_chain;
5cb1454b 51
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52#ifdef CONFIG_PROC_FS
53void __init crypto_init_proc(void);
cce9e06d 54void __exit crypto_exit_proc(void);
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55#else
56static inline void crypto_init_proc(void)
57{ }
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58static inline void crypto_exit_proc(void)
59{ }
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60#endif
61
f1ddcaf3 62static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
fbdae9f3 63{
f1ddcaf3 64 return alg->cra_ctxsize;
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65}
66
f1ddcaf3 67static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
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68{
69 return alg->cra_ctxsize;
70}
71
2825982d 72struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
c51b6c81 73struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
492e2b63 74struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
2825982d 75
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76int crypto_init_cipher_ops(struct crypto_tfm *tfm);
77int crypto_init_compress_ops(struct crypto_tfm *tfm);
78
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79void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
80void crypto_exit_compress_ops(struct crypto_tfm *tfm);
81
73d3864a 82struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
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83void crypto_larval_kill(struct crypto_alg *alg);
84struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
73d3864a 85void crypto_alg_tested(const char *name, int err);
2825982d 86
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87void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
88 struct crypto_alg *nalg);
22e5b20b 89void crypto_remove_final(struct list_head *list);
6bfd4809 90void crypto_shoot_alg(struct crypto_alg *alg);
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91struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
92 u32 mask);
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93void *crypto_create_tfm(struct crypto_alg *alg,
94 const struct crypto_type *frontend);
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95struct crypto_alg *crypto_find_alg(const char *alg_name,
96 const struct crypto_type *frontend,
97 u32 type, u32 mask);
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98void *crypto_alloc_tfm(const char *alg_name,
99 const struct crypto_type *frontend, u32 type, u32 mask);
4cc7720c 100
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101int crypto_register_notifier(struct notifier_block *nb);
102int crypto_unregister_notifier(struct notifier_block *nb);
73d3864a 103int crypto_probing_notify(unsigned long val, void *v);
2825982d 104
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105unsigned int crypto_alg_extsize(struct crypto_alg *alg);
106
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107int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
108 u32 type, u32 mask);
109
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110static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
111{
112 atomic_inc(&alg->cra_refcnt);
113 return alg;
114}
115
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116static inline void crypto_alg_put(struct crypto_alg *alg)
117{
118 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
119 alg->cra_destroy(alg);
120}
121
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122static inline int crypto_tmpl_get(struct crypto_template *tmpl)
123{
124 return try_module_get(tmpl->module);
125}
126
127static inline void crypto_tmpl_put(struct crypto_template *tmpl)
128{
129 module_put(tmpl->module);
130}
131
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132static inline int crypto_is_larval(struct crypto_alg *alg)
133{
134 return alg->cra_flags & CRYPTO_ALG_LARVAL;
135}
136
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137static inline int crypto_is_dead(struct crypto_alg *alg)
138{
139 return alg->cra_flags & CRYPTO_ALG_DEAD;
140}
141
142static inline int crypto_is_moribund(struct crypto_alg *alg)
143{
144 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
145}
146
73d3864a 147static inline void crypto_notify(unsigned long val, void *v)
2825982d 148{
73d3864a 149 blocking_notifier_call_chain(&crypto_chain, val, v);
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150}
151
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152#endif /* _CRYPTO_INTERNAL_H */
153