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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>
Neil Horman5b739ef2009-06-18 19:50:21 +080028#include <linux/fips.h>
Neil Hormanccb778e2008-08-05 14:13:08 +080029
Herbert Xu28259822006-08-06 21:23:26 +100030/* Crypto notification events. */
31enum {
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 Xu4cc77202006-08-06 21:16:34 +100039struct crypto_instance;
40struct crypto_template;
41
Herbert Xu28259822006-08-06 21:23:26 +100042struct crypto_larval {
43 struct crypto_alg alg;
44 struct crypto_alg *adult;
45 struct completion completion;
Herbert Xu492e2b62006-09-21 11:35:17 +100046 u32 mask;
Herbert Xu28259822006-08-06 21:23:26 +100047};
48
Herbert Xu5cb14542005-11-05 16:58:14 +110049extern struct list_head crypto_alg_list;
50extern struct rw_semaphore crypto_alg_sem;
Herbert Xu28259822006-08-06 21:23:26 +100051extern struct blocking_notifier_head crypto_chain;
Herbert Xu5cb14542005-11-05 16:58:14 +110052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#ifdef CONFIG_PROC_FS
54void __init crypto_init_proc(void);
Herbert Xucce9e062006-08-21 21:08:13 +100055void __exit crypto_exit_proc(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#else
57static inline void crypto_init_proc(void)
58{ }
Herbert Xucce9e062006-08-21 21:08:13 +100059static inline void crypto_exit_proc(void)
60{ }
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#endif
62
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110063static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070064{
Herbert Xuee756412006-07-09 14:49:42 +100065 unsigned int len = alg->cra_ctxsize;
66
67 if (alg->cra_alignmask) {
68 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
69 len += alg->cra_digest.dia_digestsize;
70 }
71
72 return len;
Herbert Xufbdae9f2005-07-06 13:53:29 -070073}
74
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110075static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070076{
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110077 return alg->cra_ctxsize;
Herbert Xufbdae9f2005-07-06 13:53:29 -070078}
79
Herbert Xuf1ddcaf2007-01-27 10:05:15 +110080static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
Herbert Xufbdae9f2005-07-06 13:53:29 -070081{
82 return alg->cra_ctxsize;
83}
84
Herbert Xu28259822006-08-06 21:23:26 +100085struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
Herbert Xuc51b6c82008-08-04 11:44:59 +080086struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
Herbert Xu492e2b62006-09-21 11:35:17 +100087struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
Herbert Xu28259822006-08-06 21:23:26 +100088
Linus Torvalds1da177e2005-04-16 15:20:36 -070089int crypto_init_digest_ops(struct crypto_tfm *tfm);
Loc Ho004a4032008-05-14 20:41:47 +080090int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091int crypto_init_cipher_ops(struct crypto_tfm *tfm);
92int crypto_init_compress_ops(struct crypto_tfm *tfm);
93
94void crypto_exit_digest_ops(struct crypto_tfm *tfm);
95void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
96void crypto_exit_compress_ops(struct crypto_tfm *tfm);
97
Herbert Xu73d38642008-08-03 21:15:23 +080098struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
Herbert Xub9c55aa2007-12-04 12:46:48 +110099void crypto_larval_kill(struct crypto_alg *alg);
100struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
Herbert Xu492e2b62006-09-21 11:35:17 +1000101void crypto_larval_error(const char *name, u32 type, u32 mask);
Herbert Xu73d38642008-08-03 21:15:23 +0800102void crypto_alg_tested(const char *name, int err);
Herbert Xu28259822006-08-06 21:23:26 +1000103
Herbert Xu6bfd4802006-09-21 11:39:29 +1000104void crypto_shoot_alg(struct crypto_alg *alg);
Herbert Xu27d2a332007-01-24 20:50:26 +1100105struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
106 u32 mask);
Herbert Xu3f683d62009-02-18 16:56:59 +0800107void *crypto_create_tfm(struct crypto_alg *alg,
108 const struct crypto_type *frontend);
Herbert Xud06854f2009-07-08 17:53:16 +0800109struct crypto_alg *crypto_find_alg(const char *alg_name,
110 const struct crypto_type *frontend,
111 u32 type, u32 mask);
Herbert Xu3f683d62009-02-18 16:56:59 +0800112void *crypto_alloc_tfm(const char *alg_name,
113 const struct crypto_type *frontend, u32 type, u32 mask);
Herbert Xu6bfd4802006-09-21 11:39:29 +1000114
Herbert Xu4cc77202006-08-06 21:16:34 +1000115int crypto_register_instance(struct crypto_template *tmpl,
116 struct crypto_instance *inst);
117
Herbert Xu28259822006-08-06 21:23:26 +1000118int crypto_register_notifier(struct notifier_block *nb);
119int crypto_unregister_notifier(struct notifier_block *nb);
Herbert Xu73d38642008-08-03 21:15:23 +0800120int crypto_probing_notify(unsigned long val, void *v);
Herbert Xu28259822006-08-06 21:23:26 +1000121
Herbert Xu6bfd4802006-09-21 11:39:29 +1000122static inline void crypto_alg_put(struct crypto_alg *alg)
123{
124 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
125 alg->cra_destroy(alg);
126}
127
Herbert Xu4cc77202006-08-06 21:16:34 +1000128static inline int crypto_tmpl_get(struct crypto_template *tmpl)
129{
130 return try_module_get(tmpl->module);
131}
132
133static inline void crypto_tmpl_put(struct crypto_template *tmpl)
134{
135 module_put(tmpl->module);
136}
137
Herbert Xu28259822006-08-06 21:23:26 +1000138static inline int crypto_is_larval(struct crypto_alg *alg)
139{
140 return alg->cra_flags & CRYPTO_ALG_LARVAL;
141}
142
Herbert Xu6bfd4802006-09-21 11:39:29 +1000143static inline int crypto_is_dead(struct crypto_alg *alg)
144{
145 return alg->cra_flags & CRYPTO_ALG_DEAD;
146}
147
148static inline int crypto_is_moribund(struct crypto_alg *alg)
149{
150 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
151}
152
Herbert Xu73d38642008-08-03 21:15:23 +0800153static inline void crypto_notify(unsigned long val, void *v)
Herbert Xu28259822006-08-06 21:23:26 +1000154{
Herbert Xu73d38642008-08-03 21:15:23 +0800155 blocking_notifier_call_chain(&crypto_chain, val, v);
Herbert Xu28259822006-08-06 21:23:26 +1000156}
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158#endif /* _CRYPTO_INTERNAL_H */
159