Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 5 | * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 15 | |
| 16 | #include <crypto/algapi.h> |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 17 | #include <linux/completion.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/mm.h> |
| 19 | #include <linux/highmem.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/init.h> |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 22 | #include <linux/list.h> |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 23 | #include <linux/module.h> |
Herbert Xu | fbdae9f | 2005-07-06 13:53:29 -0700 | [diff] [blame] | 24 | #include <linux/kernel.h> |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 25 | #include <linux/notifier.h> |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 26 | #include <linux/rwsem.h> |
Herbert Xu | 64baf3c | 2005-09-01 17:43:05 -0700 | [diff] [blame] | 27 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/kmap_types.h> |
| 29 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 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 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 39 | struct crypto_instance; |
| 40 | struct crypto_template; |
| 41 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 42 | struct crypto_larval { |
| 43 | struct crypto_alg alg; |
| 44 | struct crypto_alg *adult; |
| 45 | struct completion completion; |
| 46 | }; |
| 47 | |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 48 | extern struct list_head crypto_alg_list; |
| 49 | extern struct rw_semaphore crypto_alg_sem; |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 50 | extern struct blocking_notifier_head crypto_chain; |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Herbert Xu | 64baf3c | 2005-09-01 17:43:05 -0700 | [diff] [blame] | 71 | if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | cond_resched(); |
| 73 | } |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 90 | void __exit crypto_exit_proc(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #else |
| 92 | static inline void crypto_init_proc(void) |
| 93 | { } |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 94 | static inline void crypto_exit_proc(void) |
| 95 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #endif |
| 97 | |
Herbert Xu | fbdae9f | 2005-07-06 13:53:29 -0700 | [diff] [blame] | 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: |
Herbert Xu | 9d853c3 | 2005-07-15 07:41:31 -0700 | [diff] [blame] | 111 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
Herbert Xu | fbdae9f | 2005-07-06 13:53:29 -0700 | [diff] [blame] | 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 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 141 | void crypto_larval_error(const char *name); |
| 142 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 143 | int crypto_register_instance(struct crypto_template *tmpl, |
| 144 | struct crypto_instance *inst); |
| 145 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 146 | int crypto_register_notifier(struct notifier_block *nb); |
| 147 | int crypto_unregister_notifier(struct notifier_block *nb); |
| 148 | |
Herbert Xu | 4cc7720 | 2006-08-06 21:16:34 +1000 | [diff] [blame] | 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 | |
Herbert Xu | 2825982 | 2006-08-06 21:23:26 +1000 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | #endif /* _CRYPTO_INTERNAL_H */ |
| 170 | |