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1da177e4 LT |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | #ifndef _CRYPTO_INTERNAL_H | |
13 | #define _CRYPTO_INTERNAL_H | |
14 | #include <linux/crypto.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/init.h> | |
fbdae9f3 | 19 | #include <linux/kernel.h> |
64baf3cf | 20 | #include <linux/slab.h> |
1da177e4 LT |
21 | #include <asm/kmap_types.h> |
22 | ||
23 | extern enum km_type crypto_km_types[]; | |
24 | ||
25 | static inline enum km_type crypto_kmap_type(int out) | |
26 | { | |
27 | return crypto_km_types[(in_softirq() ? 2 : 0) + out]; | |
28 | } | |
29 | ||
30 | static inline void *crypto_kmap(struct page *page, int out) | |
31 | { | |
32 | return kmap_atomic(page, crypto_kmap_type(out)); | |
33 | } | |
34 | ||
35 | static inline void crypto_kunmap(void *vaddr, int out) | |
36 | { | |
37 | kunmap_atomic(vaddr, crypto_kmap_type(out)); | |
38 | } | |
39 | ||
40 | static inline void crypto_yield(struct crypto_tfm *tfm) | |
41 | { | |
64baf3cf | 42 | if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
1da177e4 LT |
43 | cond_resched(); |
44 | } | |
45 | ||
1da177e4 LT |
46 | #ifdef CONFIG_CRYPTO_HMAC |
47 | int crypto_alloc_hmac_block(struct crypto_tfm *tfm); | |
48 | void crypto_free_hmac_block(struct crypto_tfm *tfm); | |
49 | #else | |
50 | static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) | |
51 | { | |
52 | return 0; | |
53 | } | |
54 | ||
55 | static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) | |
56 | { } | |
57 | #endif | |
58 | ||
59 | #ifdef CONFIG_PROC_FS | |
60 | void __init crypto_init_proc(void); | |
61 | #else | |
62 | static inline void crypto_init_proc(void) | |
63 | { } | |
64 | #endif | |
65 | ||
fbdae9f3 HX |
66 | static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, |
67 | int flags) | |
68 | { | |
69 | return alg->cra_ctxsize; | |
70 | } | |
71 | ||
72 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, | |
73 | int flags) | |
74 | { | |
75 | unsigned int len = alg->cra_ctxsize; | |
76 | ||
77 | switch (flags & CRYPTO_TFM_MODE_MASK) { | |
78 | case CRYPTO_TFM_MODE_CBC: | |
9d853c37 | 79 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
fbdae9f3 HX |
80 | len += alg->cra_blocksize; |
81 | break; | |
82 | } | |
83 | ||
84 | return len; | |
85 | } | |
86 | ||
87 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, | |
88 | int flags) | |
89 | { | |
90 | return alg->cra_ctxsize; | |
91 | } | |
92 | ||
1da177e4 LT |
93 | int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); |
94 | int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); | |
95 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); | |
96 | ||
97 | int crypto_init_digest_ops(struct crypto_tfm *tfm); | |
98 | int crypto_init_cipher_ops(struct crypto_tfm *tfm); | |
99 | int crypto_init_compress_ops(struct crypto_tfm *tfm); | |
100 | ||
101 | void crypto_exit_digest_ops(struct crypto_tfm *tfm); | |
102 | void crypto_exit_cipher_ops(struct crypto_tfm *tfm); | |
103 | void crypto_exit_compress_ops(struct crypto_tfm *tfm); | |
104 | ||
105 | #endif /* _CRYPTO_INTERNAL_H */ | |
106 |