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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Cryptographic API.
3 *
4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
Herbert Xu5cb14542005-11-05 16:58:14 +11005 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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 Xucce9e062006-08-21 21:08:13 +100015
16#include <crypto/algapi.h>
Herbert Xu28259822006-08-06 21:23:26 +100017#include <linux/completion.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/mm.h>
19#include <linux/highmem.h>
20#include <linux/interrupt.h>
21#include <linux/init.h>
Herbert Xu5cb14542005-11-05 16:58:14 +110022#include <linux/list.h>
Herbert Xu4cc77202006-08-06 21:16:34 +100023#include <linux/module.h>
Herbert Xufbdae9f2005-07-06 13:53:29 -070024#include <linux/kernel.h>
Herbert Xu28259822006-08-06 21:23:26 +100025#include <linux/notifier.h>
Herbert Xu5cb14542005-11-05 16:58:14 +110026#include <linux/rwsem.h>
Herbert Xu64baf3c2005-09-01 17:43:05 -070027#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Herbert Xu28259822006-08-06 21:23:26 +100029/* Crypto notification events. */
30enum {
31 CRYPTO_MSG_ALG_REQUEST,
32 CRYPTO_MSG_ALG_REGISTER,
33 CRYPTO_MSG_ALG_UNREGISTER,
34 CRYPTO_MSG_TMPL_REGISTER,
35 CRYPTO_MSG_TMPL_UNREGISTER,
36};
37
Herbert Xu4cc77202006-08-06 21:16:34 +100038struct crypto_instance;
39struct crypto_template;
40
Herbert Xu28259822006-08-06 21:23:26 +100041struct crypto_larval {
42 struct crypto_alg alg;
43 struct crypto_alg *adult;
44 struct completion completion;
Herbert Xu492e2b62006-09-21 11:35:17 +100045 u32 mask;
Herbert Xu28259822006-08-06 21:23:26 +100046};
47
Herbert Xu5cb14542005-11-05 16:58:14 +110048extern struct list_head crypto_alg_list;
49extern struct rw_semaphore crypto_alg_sem;
Herbert Xu28259822006-08-06 21:23:26 +100050extern struct blocking_notifier_head crypto_chain;
Herbert Xu5cb14542005-11-05 16:58:14 +110051
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#ifdef CONFIG_PROC_FS
53void __init crypto_init_proc(void);
Herbert Xucce9e062006-08-21 21:08:13 +100054void __exit crypto_exit_proc(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#else
56static inline void crypto_init_proc(void)
57{ }
Herbert Xucce9e062006-08-21 21:08:13 +100058static inline void crypto_exit_proc(void)
59{ }
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#endif
61
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110062static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070063{
Herbert Xuee756412006-07-09 14:49:42 +100064 unsigned int len = alg->cra_ctxsize;
65
66 if (alg->cra_alignmask) {
67 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
68 len += alg->cra_digest.dia_digestsize;
69 }
70
71 return len;
Herbert Xufbdae9f2005-07-06 13:53:29 -070072}
73
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110074static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070075{
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110076 return alg->cra_ctxsize;
Herbert Xufbdae9f2005-07-06 13:53:29 -070077}
78
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110079static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070080{
81 return alg->cra_ctxsize;
82}
83
Herbert Xu28259822006-08-06 21:23:26 +100084struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
Herbert Xu492e2b62006-09-21 11:35:17 +100085struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
86struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
Herbert Xu28259822006-08-06 21:23:26 +100087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088int crypto_init_digest_ops(struct crypto_tfm *tfm);
89int crypto_init_cipher_ops(struct crypto_tfm *tfm);
90int crypto_init_compress_ops(struct crypto_tfm *tfm);
91
92void crypto_exit_digest_ops(struct crypto_tfm *tfm);
93void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
94void crypto_exit_compress_ops(struct crypto_tfm *tfm);
95
Herbert Xub9c55aa2007-12-04 12:46:48 +110096void crypto_larval_kill(struct crypto_alg *alg);
97struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
Herbert Xu492e2b62006-09-21 11:35:17 +100098void crypto_larval_error(const char *name, u32 type, u32 mask);
Herbert Xu28259822006-08-06 21:23:26 +100099
Herbert Xu6bfd4802006-09-21 11:39:29 +1000100void crypto_shoot_alg(struct crypto_alg *alg);
Herbert Xu27d2a332007-01-24 20:50:26 +1100101struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
102 u32 mask);
Herbert Xu6bfd4802006-09-21 11:39:29 +1000103
Herbert Xu4cc77202006-08-06 21:16:34 +1000104int crypto_register_instance(struct crypto_template *tmpl,
105 struct crypto_instance *inst);
106
Herbert Xu28259822006-08-06 21:23:26 +1000107int crypto_register_notifier(struct notifier_block *nb);
108int crypto_unregister_notifier(struct notifier_block *nb);
109
Herbert Xu6bfd4802006-09-21 11:39:29 +1000110static inline void crypto_alg_put(struct crypto_alg *alg)
111{
112 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
113 alg->cra_destroy(alg);
114}
115
Herbert Xu4cc77202006-08-06 21:16:34 +1000116static inline int crypto_tmpl_get(struct crypto_template *tmpl)
117{
118 return try_module_get(tmpl->module);
119}
120
121static inline void crypto_tmpl_put(struct crypto_template *tmpl)
122{
123 module_put(tmpl->module);
124}
125
Herbert Xu28259822006-08-06 21:23:26 +1000126static inline int crypto_is_larval(struct crypto_alg *alg)
127{
128 return alg->cra_flags & CRYPTO_ALG_LARVAL;
129}
130
Herbert Xu6bfd4802006-09-21 11:39:29 +1000131static inline int crypto_is_dead(struct crypto_alg *alg)
132{
133 return alg->cra_flags & CRYPTO_ALG_DEAD;
134}
135
136static inline int crypto_is_moribund(struct crypto_alg *alg)
137{
138 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
139}
140
Herbert Xu28259822006-08-06 21:23:26 +1000141static inline int crypto_notify(unsigned long val, void *v)
142{
143 return blocking_notifier_call_chain(&crypto_chain, val, v);
144}
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146#endif /* _CRYPTO_INTERNAL_H */
147