Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 <asm/kmap_types.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
53extern enum km_type crypto_km_types[];
54
55static inline enum km_type crypto_kmap_type(int out)
56{
57 return crypto_km_types[(in_softirq() ? 2 : 0) + out];
58}
59
60static inline void *crypto_kmap(struct page *page, int out)
61{
62 return kmap_atomic(page, crypto_kmap_type(out));
63}
64
65static inline void crypto_kunmap(void *vaddr, int out)
66{
67 kunmap_atomic(vaddr, crypto_kmap_type(out));
68}
69
70static inline void crypto_yield(u32 flags)
71{
72 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
73 cond_resched();
74}
75
76#ifdef CONFIG_PROC_FS
77void __init crypto_init_proc(void);
78void __exit crypto_exit_proc(void);
79#else
80static inline void crypto_init_proc(void)
81{ }
82static inline void crypto_exit_proc(void)
83{ }
84#endif
85
86static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
87 int flags)
88{
89 unsigned int len = alg->cra_ctxsize;
90
91 if (alg->cra_alignmask) {
92 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
93 len += alg->cra_digest.dia_digestsize;
94 }
95
96 return len;
97}
98
99static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
100 int flags)
101{
102 unsigned int len = alg->cra_ctxsize;
103
104 switch (flags & CRYPTO_TFM_MODE_MASK) {
105 case CRYPTO_TFM_MODE_CBC:
106 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
107 len += alg->cra_blocksize;
108 break;
109 }
110
111 return len;
112}
113
114static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
115 int flags)
116{
117 return alg->cra_ctxsize;
118}
119
120struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
121struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
122struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
123
124int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
125int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
126int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
127
128int crypto_init_digest_ops(struct crypto_tfm *tfm);
129int crypto_init_cipher_ops(struct crypto_tfm *tfm);
130int crypto_init_compress_ops(struct crypto_tfm *tfm);
131
132void crypto_exit_digest_ops(struct crypto_tfm *tfm);
133void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
134void crypto_exit_compress_ops(struct crypto_tfm *tfm);
135
136void crypto_larval_error(const char *name, u32 type, u32 mask);
137
138void crypto_shoot_alg(struct crypto_alg *alg);
139struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags);
140
141int crypto_register_instance(struct crypto_template *tmpl,
142 struct crypto_instance *inst);
143
144int crypto_register_notifier(struct notifier_block *nb);
145int crypto_unregister_notifier(struct notifier_block *nb);
146
147static inline void crypto_alg_put(struct crypto_alg *alg)
148{
149 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
150 alg->cra_destroy(alg);
151}
152
153static inline int crypto_tmpl_get(struct crypto_template *tmpl)
154{
155 return try_module_get(tmpl->module);
156}
157
158static inline void crypto_tmpl_put(struct crypto_template *tmpl)
159{
160 module_put(tmpl->module);
161}
162
163static inline int crypto_is_larval(struct crypto_alg *alg)
164{
165 return alg->cra_flags & CRYPTO_ALG_LARVAL;
166}
167
168static inline int crypto_is_dead(struct crypto_alg *alg)
169{
170 return alg->cra_flags & CRYPTO_ALG_DEAD;
171}
172
173static inline int crypto_is_moribund(struct crypto_alg *alg)
174{
175 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
176}
177
178static inline int crypto_notify(unsigned long val, void *v)
179{
180 return blocking_notifier_call_chain(&crypto_chain, val, v);
181}
182
183#endif /* _CRYPTO_INTERNAL_H */
184