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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
Richard Hartmann269ab452010-03-10 18:24:46 +08009 * Software Foundation; either version 2 of the License, or (at your option)
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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>
Neil Hormanccb778e2008-08-05 14:13:08 +080028
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_cipher_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070063{
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110064 return alg->cra_ctxsize;
Herbert Xufbdae9f2005-07-06 13:53:29 -070065}
66
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110067static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070068{
69 return alg->cra_ctxsize;
70}
71
Herbert Xu28259822006-08-06 21:23:26 +100072struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
Herbert Xuc51b6c82008-08-04 11:44:59 +080073struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
Herbert Xu492e2b62006-09-21 11:35:17 +100074struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
Herbert Xu28259822006-08-06 21:23:26 +100075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076int crypto_init_cipher_ops(struct crypto_tfm *tfm);
77int crypto_init_compress_ops(struct crypto_tfm *tfm);
78
Herbert Xu73d38642008-08-03 21:15:23 +080079struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
Herbert Xub9c55aa2007-12-04 12:46:48 +110080void crypto_larval_kill(struct crypto_alg *alg);
81struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
Herbert Xu73d38642008-08-03 21:15:23 +080082void crypto_alg_tested(const char *name, int err);
Herbert Xu28259822006-08-06 21:23:26 +100083
Steffen Klassert89b596b2011-09-27 07:22:08 +020084void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
85 struct crypto_alg *nalg);
Steffen Klassert22e5b202011-09-27 07:23:07 +020086void crypto_remove_final(struct list_head *list);
Herbert Xu6bfd4802006-09-21 11:39:29 +100087void crypto_shoot_alg(struct crypto_alg *alg);
Herbert Xu27d2a332007-01-24 20:50:26 +110088struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
89 u32 mask);
Herbert Xu3f683d62009-02-18 16:56:59 +080090void *crypto_create_tfm(struct crypto_alg *alg,
91 const struct crypto_type *frontend);
Herbert Xud06854f2009-07-08 17:53:16 +080092struct crypto_alg *crypto_find_alg(const char *alg_name,
93 const struct crypto_type *frontend,
94 u32 type, u32 mask);
Herbert Xu3f683d62009-02-18 16:56:59 +080095void *crypto_alloc_tfm(const char *alg_name,
96 const struct crypto_type *frontend, u32 type, u32 mask);
Herbert Xu6bfd4802006-09-21 11:39:29 +100097
Herbert Xu28259822006-08-06 21:23:26 +100098int crypto_register_notifier(struct notifier_block *nb);
99int crypto_unregister_notifier(struct notifier_block *nb);
Herbert Xu73d38642008-08-03 21:15:23 +0800100int crypto_probing_notify(unsigned long val, void *v);
Herbert Xu28259822006-08-06 21:23:26 +1000101
Herbert Xu38d21432015-04-20 13:39:00 +0800102unsigned int crypto_alg_extsize(struct crypto_alg *alg);
103
Herbert Xuf2aefda2016-01-23 13:51:01 +0800104int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
105 u32 type, u32 mask);
106
Herbert Xu939e1772013-06-25 19:15:17 +0800107static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
108{
109 atomic_inc(&alg->cra_refcnt);
110 return alg;
111}
112
Herbert Xu6bfd4802006-09-21 11:39:29 +1000113static inline void crypto_alg_put(struct crypto_alg *alg)
114{
115 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
116 alg->cra_destroy(alg);
117}
118
Herbert Xu4cc77202006-08-06 21:16:34 +1000119static inline int crypto_tmpl_get(struct crypto_template *tmpl)
120{
121 return try_module_get(tmpl->module);
122}
123
124static inline void crypto_tmpl_put(struct crypto_template *tmpl)
125{
126 module_put(tmpl->module);
127}
128
Herbert Xu28259822006-08-06 21:23:26 +1000129static inline int crypto_is_larval(struct crypto_alg *alg)
130{
131 return alg->cra_flags & CRYPTO_ALG_LARVAL;
132}
133
Herbert Xu6bfd4802006-09-21 11:39:29 +1000134static inline int crypto_is_dead(struct crypto_alg *alg)
135{
136 return alg->cra_flags & CRYPTO_ALG_DEAD;
137}
138
139static inline int crypto_is_moribund(struct crypto_alg *alg)
140{
141 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
142}
143
Herbert Xu73d38642008-08-03 21:15:23 +0800144static inline void crypto_notify(unsigned long val, void *v)
Herbert Xu28259822006-08-06 21:23:26 +1000145{
Herbert Xu73d38642008-08-03 21:15:23 +0800146 blocking_notifier_call_chain(&crypto_chain, val, v);
Herbert Xu28259822006-08-06 21:23:26 +1000147}
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#endif /* _CRYPTO_INTERNAL_H */
150