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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; | |
492e2b63 | 46 | u32 mask; |
2825982d HX |
47 | }; |
48 | ||
5cb1454b HX |
49 | extern struct list_head crypto_alg_list; |
50 | extern struct rw_semaphore crypto_alg_sem; | |
2825982d | 51 | extern struct blocking_notifier_head crypto_chain; |
5cb1454b | 52 | |
1da177e4 LT |
53 | extern enum km_type crypto_km_types[]; |
54 | ||
55 | static inline enum km_type crypto_kmap_type(int out) | |
56 | { | |
57 | return crypto_km_types[(in_softirq() ? 2 : 0) + out]; | |
58 | } | |
59 | ||
60 | static inline void *crypto_kmap(struct page *page, int out) | |
61 | { | |
62 | return kmap_atomic(page, crypto_kmap_type(out)); | |
63 | } | |
64 | ||
65 | static inline void crypto_kunmap(void *vaddr, int out) | |
66 | { | |
67 | kunmap_atomic(vaddr, crypto_kmap_type(out)); | |
68 | } | |
69 | ||
70 | static inline void crypto_yield(struct crypto_tfm *tfm) | |
71 | { | |
64baf3cf | 72 | if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
1da177e4 LT |
73 | cond_resched(); |
74 | } | |
75 | ||
1da177e4 LT |
76 | #ifdef CONFIG_CRYPTO_HMAC |
77 | int crypto_alloc_hmac_block(struct crypto_tfm *tfm); | |
78 | void crypto_free_hmac_block(struct crypto_tfm *tfm); | |
79 | #else | |
80 | static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) | |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) | |
86 | { } | |
87 | #endif | |
88 | ||
89 | #ifdef CONFIG_PROC_FS | |
90 | void __init crypto_init_proc(void); | |
cce9e06d | 91 | void __exit crypto_exit_proc(void); |
1da177e4 LT |
92 | #else |
93 | static inline void crypto_init_proc(void) | |
94 | { } | |
cce9e06d HX |
95 | static inline void crypto_exit_proc(void) |
96 | { } | |
1da177e4 LT |
97 | #endif |
98 | ||
fbdae9f3 HX |
99 | static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, |
100 | int flags) | |
101 | { | |
102 | return alg->cra_ctxsize; | |
103 | } | |
104 | ||
105 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, | |
106 | int flags) | |
107 | { | |
108 | unsigned int len = alg->cra_ctxsize; | |
109 | ||
110 | switch (flags & CRYPTO_TFM_MODE_MASK) { | |
111 | case CRYPTO_TFM_MODE_CBC: | |
9d853c37 | 112 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
fbdae9f3 HX |
113 | len += alg->cra_blocksize; |
114 | break; | |
115 | } | |
116 | ||
117 | return len; | |
118 | } | |
119 | ||
120 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, | |
121 | int flags) | |
122 | { | |
123 | return alg->cra_ctxsize; | |
124 | } | |
125 | ||
2825982d HX |
126 | struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); |
127 | void crypto_mod_put(struct crypto_alg *alg); | |
492e2b63 HX |
128 | struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask); |
129 | struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); | |
2825982d | 130 | |
1da177e4 LT |
131 | int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); |
132 | int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); | |
133 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); | |
134 | ||
135 | int crypto_init_digest_ops(struct crypto_tfm *tfm); | |
136 | int crypto_init_cipher_ops(struct crypto_tfm *tfm); | |
137 | int crypto_init_compress_ops(struct crypto_tfm *tfm); | |
138 | ||
139 | void crypto_exit_digest_ops(struct crypto_tfm *tfm); | |
140 | void crypto_exit_cipher_ops(struct crypto_tfm *tfm); | |
141 | void crypto_exit_compress_ops(struct crypto_tfm *tfm); | |
142 | ||
492e2b63 | 143 | void crypto_larval_error(const char *name, u32 type, u32 mask); |
2825982d | 144 | |
6bfd4809 HX |
145 | void crypto_shoot_alg(struct crypto_alg *alg); |
146 | struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags); | |
147 | ||
4cc7720c HX |
148 | int crypto_register_instance(struct crypto_template *tmpl, |
149 | struct crypto_instance *inst); | |
150 | ||
2825982d HX |
151 | int crypto_register_notifier(struct notifier_block *nb); |
152 | int crypto_unregister_notifier(struct notifier_block *nb); | |
153 | ||
6bfd4809 HX |
154 | static inline void crypto_alg_put(struct crypto_alg *alg) |
155 | { | |
156 | if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) | |
157 | alg->cra_destroy(alg); | |
158 | } | |
159 | ||
4cc7720c HX |
160 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) |
161 | { | |
162 | return try_module_get(tmpl->module); | |
163 | } | |
164 | ||
165 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) | |
166 | { | |
167 | module_put(tmpl->module); | |
168 | } | |
169 | ||
2825982d HX |
170 | static inline int crypto_is_larval(struct crypto_alg *alg) |
171 | { | |
172 | return alg->cra_flags & CRYPTO_ALG_LARVAL; | |
173 | } | |
174 | ||
6bfd4809 HX |
175 | static inline int crypto_is_dead(struct crypto_alg *alg) |
176 | { | |
177 | return alg->cra_flags & CRYPTO_ALG_DEAD; | |
178 | } | |
179 | ||
180 | static inline int crypto_is_moribund(struct crypto_alg *alg) | |
181 | { | |
182 | return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); | |
183 | } | |
184 | ||
2825982d HX |
185 | static inline int crypto_notify(unsigned long val, void *v) |
186 | { | |
187 | return blocking_notifier_call_chain(&crypto_chain, val, v); | |
188 | } | |
189 | ||
1da177e4 LT |
190 | #endif /* _CRYPTO_INTERNAL_H */ |
191 |