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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 | |
15 | #include <linux/crypto.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/highmem.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/init.h> | |
5cb1454b | 20 | #include <linux/list.h> |
fbdae9f3 | 21 | #include <linux/kernel.h> |
5cb1454b | 22 | #include <linux/rwsem.h> |
64baf3cf | 23 | #include <linux/slab.h> |
1da177e4 LT |
24 | #include <asm/kmap_types.h> |
25 | ||
5cb1454b HX |
26 | extern struct list_head crypto_alg_list; |
27 | extern struct rw_semaphore crypto_alg_sem; | |
28 | ||
1da177e4 LT |
29 | extern enum km_type crypto_km_types[]; |
30 | ||
31 | static inline enum km_type crypto_kmap_type(int out) | |
32 | { | |
33 | return crypto_km_types[(in_softirq() ? 2 : 0) + out]; | |
34 | } | |
35 | ||
36 | static inline void *crypto_kmap(struct page *page, int out) | |
37 | { | |
38 | return kmap_atomic(page, crypto_kmap_type(out)); | |
39 | } | |
40 | ||
41 | static inline void crypto_kunmap(void *vaddr, int out) | |
42 | { | |
43 | kunmap_atomic(vaddr, crypto_kmap_type(out)); | |
44 | } | |
45 | ||
46 | static inline void crypto_yield(struct crypto_tfm *tfm) | |
47 | { | |
64baf3cf | 48 | if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
1da177e4 LT |
49 | cond_resched(); |
50 | } | |
51 | ||
1da177e4 LT |
52 | #ifdef CONFIG_CRYPTO_HMAC |
53 | int crypto_alloc_hmac_block(struct crypto_tfm *tfm); | |
54 | void crypto_free_hmac_block(struct crypto_tfm *tfm); | |
55 | #else | |
56 | static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) | |
57 | { | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) | |
62 | { } | |
63 | #endif | |
64 | ||
65 | #ifdef CONFIG_PROC_FS | |
66 | void __init crypto_init_proc(void); | |
67 | #else | |
68 | static inline void crypto_init_proc(void) | |
69 | { } | |
70 | #endif | |
71 | ||
fbdae9f3 HX |
72 | static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, |
73 | int flags) | |
74 | { | |
75 | return alg->cra_ctxsize; | |
76 | } | |
77 | ||
78 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, | |
79 | int flags) | |
80 | { | |
81 | unsigned int len = alg->cra_ctxsize; | |
82 | ||
83 | switch (flags & CRYPTO_TFM_MODE_MASK) { | |
84 | case CRYPTO_TFM_MODE_CBC: | |
9d853c37 | 85 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
fbdae9f3 HX |
86 | len += alg->cra_blocksize; |
87 | break; | |
88 | } | |
89 | ||
90 | return len; | |
91 | } | |
92 | ||
93 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, | |
94 | int flags) | |
95 | { | |
96 | return alg->cra_ctxsize; | |
97 | } | |
98 | ||
1da177e4 LT |
99 | int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); |
100 | int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); | |
101 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); | |
102 | ||
103 | int crypto_init_digest_ops(struct crypto_tfm *tfm); | |
104 | int crypto_init_cipher_ops(struct crypto_tfm *tfm); | |
105 | int crypto_init_compress_ops(struct crypto_tfm *tfm); | |
106 | ||
107 | void crypto_exit_digest_ops(struct crypto_tfm *tfm); | |
108 | void crypto_exit_cipher_ops(struct crypto_tfm *tfm); | |
109 | void crypto_exit_compress_ops(struct crypto_tfm *tfm); | |
110 | ||
111 | #endif /* _CRYPTO_INTERNAL_H */ | |
112 |