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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 | { | |
ee756416 HX |
102 | unsigned int len = alg->cra_ctxsize; |
103 | ||
104 | if (alg->cra_alignmask) { | |
105 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); | |
106 | len += alg->cra_digest.dia_digestsize; | |
107 | } | |
108 | ||
109 | return len; | |
fbdae9f3 HX |
110 | } |
111 | ||
112 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, | |
113 | int flags) | |
114 | { | |
115 | unsigned int len = alg->cra_ctxsize; | |
116 | ||
117 | switch (flags & CRYPTO_TFM_MODE_MASK) { | |
118 | case CRYPTO_TFM_MODE_CBC: | |
9d853c37 | 119 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
fbdae9f3 HX |
120 | len += alg->cra_blocksize; |
121 | break; | |
122 | } | |
123 | ||
124 | return len; | |
125 | } | |
126 | ||
127 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, | |
128 | int flags) | |
129 | { | |
130 | return alg->cra_ctxsize; | |
131 | } | |
132 | ||
2825982d HX |
133 | struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); |
134 | void crypto_mod_put(struct crypto_alg *alg); | |
492e2b63 HX |
135 | struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask); |
136 | struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); | |
2825982d | 137 | |
1da177e4 LT |
138 | int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); |
139 | int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); | |
140 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); | |
141 | ||
142 | int crypto_init_digest_ops(struct crypto_tfm *tfm); | |
143 | int crypto_init_cipher_ops(struct crypto_tfm *tfm); | |
144 | int crypto_init_compress_ops(struct crypto_tfm *tfm); | |
145 | ||
146 | void crypto_exit_digest_ops(struct crypto_tfm *tfm); | |
147 | void crypto_exit_cipher_ops(struct crypto_tfm *tfm); | |
148 | void crypto_exit_compress_ops(struct crypto_tfm *tfm); | |
149 | ||
492e2b63 | 150 | void crypto_larval_error(const char *name, u32 type, u32 mask); |
2825982d | 151 | |
6bfd4809 HX |
152 | void crypto_shoot_alg(struct crypto_alg *alg); |
153 | struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags); | |
154 | ||
4cc7720c HX |
155 | int crypto_register_instance(struct crypto_template *tmpl, |
156 | struct crypto_instance *inst); | |
157 | ||
2825982d HX |
158 | int crypto_register_notifier(struct notifier_block *nb); |
159 | int crypto_unregister_notifier(struct notifier_block *nb); | |
160 | ||
6bfd4809 HX |
161 | static inline void crypto_alg_put(struct crypto_alg *alg) |
162 | { | |
163 | if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) | |
164 | alg->cra_destroy(alg); | |
165 | } | |
166 | ||
4cc7720c HX |
167 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) |
168 | { | |
169 | return try_module_get(tmpl->module); | |
170 | } | |
171 | ||
172 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) | |
173 | { | |
174 | module_put(tmpl->module); | |
175 | } | |
176 | ||
2825982d HX |
177 | static inline int crypto_is_larval(struct crypto_alg *alg) |
178 | { | |
179 | return alg->cra_flags & CRYPTO_ALG_LARVAL; | |
180 | } | |
181 | ||
6bfd4809 HX |
182 | static inline int crypto_is_dead(struct crypto_alg *alg) |
183 | { | |
184 | return alg->cra_flags & CRYPTO_ALG_DEAD; | |
185 | } | |
186 | ||
187 | static inline int crypto_is_moribund(struct crypto_alg *alg) | |
188 | { | |
189 | return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); | |
190 | } | |
191 | ||
2825982d HX |
192 | static inline int crypto_notify(unsigned long val, void *v) |
193 | { | |
194 | return blocking_notifier_call_chain(&crypto_chain, val, v); | |
195 | } | |
196 | ||
1da177e4 LT |
197 | #endif /* _CRYPTO_INTERNAL_H */ |
198 |