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1da177e4 LT |
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> |
1da177e4 LT |
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 | |
cce9e06d HX |
15 | |
16 | #include <crypto/algapi.h> | |
2825982d | 17 | #include <linux/completion.h> |
1da177e4 LT |
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> |
1da177e4 LT |
28 | #include <asm/kmap_types.h> |
29 | ||
2825982d HX |
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 | ||
4cc7720c HX |
39 | struct crypto_instance; |
40 | struct crypto_template; | |
41 | ||
2825982d HX |
42 | struct crypto_larval { |
43 | struct crypto_alg alg; | |
44 | struct crypto_alg *adult; | |
45 | struct completion completion; | |
46 | }; | |
47 | ||
5cb1454b HX |
48 | extern struct list_head crypto_alg_list; |
49 | extern struct rw_semaphore crypto_alg_sem; | |
2825982d | 50 | extern struct blocking_notifier_head crypto_chain; |
5cb1454b | 51 | |
1da177e4 LT |
52 | extern enum km_type crypto_km_types[]; |
53 | ||
54 | static inline enum km_type crypto_kmap_type(int out) | |
55 | { | |
56 | return crypto_km_types[(in_softirq() ? 2 : 0) + out]; | |
57 | } | |
58 | ||
59 | static inline void *crypto_kmap(struct page *page, int out) | |
60 | { | |
61 | return kmap_atomic(page, crypto_kmap_type(out)); | |
62 | } | |
63 | ||
64 | static inline void crypto_kunmap(void *vaddr, int out) | |
65 | { | |
66 | kunmap_atomic(vaddr, crypto_kmap_type(out)); | |
67 | } | |
68 | ||
69 | static inline void crypto_yield(struct crypto_tfm *tfm) | |
70 | { | |
64baf3cf | 71 | if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
1da177e4 LT |
72 | cond_resched(); |
73 | } | |
74 | ||
1da177e4 LT |
75 | #ifdef CONFIG_CRYPTO_HMAC |
76 | int crypto_alloc_hmac_block(struct crypto_tfm *tfm); | |
77 | void crypto_free_hmac_block(struct crypto_tfm *tfm); | |
78 | #else | |
79 | static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) | |
85 | { } | |
86 | #endif | |
87 | ||
88 | #ifdef CONFIG_PROC_FS | |
89 | void __init crypto_init_proc(void); | |
cce9e06d | 90 | void __exit crypto_exit_proc(void); |
1da177e4 LT |
91 | #else |
92 | static inline void crypto_init_proc(void) | |
93 | { } | |
cce9e06d HX |
94 | static inline void crypto_exit_proc(void) |
95 | { } | |
1da177e4 LT |
96 | #endif |
97 | ||
fbdae9f3 HX |
98 | static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, |
99 | int flags) | |
100 | { | |
101 | return alg->cra_ctxsize; | |
102 | } | |
103 | ||
104 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, | |
105 | int flags) | |
106 | { | |
107 | unsigned int len = alg->cra_ctxsize; | |
108 | ||
109 | switch (flags & CRYPTO_TFM_MODE_MASK) { | |
110 | case CRYPTO_TFM_MODE_CBC: | |
9d853c37 | 111 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
fbdae9f3 HX |
112 | len += alg->cra_blocksize; |
113 | break; | |
114 | } | |
115 | ||
116 | return len; | |
117 | } | |
118 | ||
119 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, | |
120 | int flags) | |
121 | { | |
122 | return alg->cra_ctxsize; | |
123 | } | |
124 | ||
2825982d HX |
125 | struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); |
126 | void crypto_mod_put(struct crypto_alg *alg); | |
127 | struct crypto_alg *__crypto_alg_lookup(const char *name); | |
128 | ||
1da177e4 LT |
129 | int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); |
130 | int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); | |
131 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); | |
132 | ||
133 | int crypto_init_digest_ops(struct crypto_tfm *tfm); | |
134 | int crypto_init_cipher_ops(struct crypto_tfm *tfm); | |
135 | int crypto_init_compress_ops(struct crypto_tfm *tfm); | |
136 | ||
137 | void crypto_exit_digest_ops(struct crypto_tfm *tfm); | |
138 | void crypto_exit_cipher_ops(struct crypto_tfm *tfm); | |
139 | void crypto_exit_compress_ops(struct crypto_tfm *tfm); | |
140 | ||
2825982d HX |
141 | void crypto_larval_error(const char *name); |
142 | ||
4cc7720c HX |
143 | int crypto_register_instance(struct crypto_template *tmpl, |
144 | struct crypto_instance *inst); | |
145 | ||
2825982d HX |
146 | int crypto_register_notifier(struct notifier_block *nb); |
147 | int crypto_unregister_notifier(struct notifier_block *nb); | |
148 | ||
4cc7720c HX |
149 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) |
150 | { | |
151 | return try_module_get(tmpl->module); | |
152 | } | |
153 | ||
154 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) | |
155 | { | |
156 | module_put(tmpl->module); | |
157 | } | |
158 | ||
2825982d HX |
159 | static inline int crypto_is_larval(struct crypto_alg *alg) |
160 | { | |
161 | return alg->cra_flags & CRYPTO_ALG_LARVAL; | |
162 | } | |
163 | ||
164 | static inline int crypto_notify(unsigned long val, void *v) | |
165 | { | |
166 | return blocking_notifier_call_chain(&crypto_chain, val, v); | |
167 | } | |
168 | ||
1da177e4 LT |
169 | #endif /* _CRYPTO_INTERNAL_H */ |
170 |