LXR linux/crypto/internal.h

   1/*
   2 * Cryptographic API.
   3 *
   4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
   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
  15
  16#include <crypto/algapi.h>
  17#include <linux/completion.h>
  18#include <linux/mm.h>
  19#include <linux/highmem.h>
  20#include <linux/interrupt.h>
  21#include <linux/init.h>
  22#include <linux/list.h>
  23#include <linux/module.h>
  24#include <linux/kernel.h>
  25#include <linux/notifier.h>
  26#include <linux/rwsem.h>
  27#include <linux/slab.h>
  28#include <linux/fips.h>
  29
  30/* 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
  39struct crypto_instance;
  40struct crypto_template;
  41
  42struct crypto_larval {
  43        struct crypto_alg alg;
  44        struct crypto_alg *adult;
  45        struct completion completion;
  46        u32 mask;
  47};
  48
  49extern struct list_head crypto_alg_list;
  50extern struct rw_semaphore crypto_alg_sem;
  51extern struct blocking_notifier_head crypto_chain;
  52
  53#ifdef CONFIG_PROC_FS
  54void __init crypto_init_proc(void);
  55void __exit crypto_exit_proc(void);
  56#else
  57static inline void crypto_init_proc(void)
  58{ }
  59static inline void crypto_exit_proc(void)
  60{ }
  61#endif
  62
  63static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  64{
  65        return alg->cra_ctxsize;
  66}
  67
  68static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  69{
  70        return alg->cra_ctxsize;
  71}
  72
  73struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  74struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
  75struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  76
  77int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  78int crypto_init_compress_ops(struct crypto_tfm *tfm);
  79
  80void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  81void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  82
  83struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  84void crypto_larval_kill(struct crypto_alg *alg);
  85struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
  86void crypto_larval_error(const char *name, u32 type, u32 mask);
  87void crypto_alg_tested(const char *name, int err);
  88
  89void crypto_shoot_alg(struct crypto_alg *alg);
  90struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  91                                      u32 mask);
  92void *crypto_create_tfm(struct crypto_alg *alg,
  93                        const struct crypto_type *frontend);
  94struct crypto_alg *crypto_find_alg(const char *alg_name,
  95                                   const struct crypto_type *frontend,
  96                                   u32 type, u32 mask);
  97void *crypto_alloc_tfm(const char *alg_name,
  98                       const struct crypto_type *frontend, u32 type, u32 mask);
  99
 100int crypto_register_notifier(struct notifier_block *nb);
 101int crypto_unregister_notifier(struct notifier_block *nb);
 102int crypto_probing_notify(unsigned long val, void *v);
 103
 104static inline void crypto_alg_put(struct crypto_alg *alg)
 105{
 106        if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 107                alg->cra_destroy(alg);
 108}
 109
 110static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 111{
 112        return try_module_get(tmpl->module);
 113}
 114
 115static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 116{
 117        module_put(tmpl->module);
 118}
 119
 120static inline int crypto_is_larval(struct crypto_alg *alg)
 121{
 122        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 123}
 124
 125static inline int crypto_is_dead(struct crypto_alg *alg)
 126{
 127        return alg->cra_flags & CRYPTO_ALG_DEAD;
 128}
 129
 130static inline int crypto_is_moribund(struct crypto_alg *alg)
 131{
 132        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 133}
 134
 135static inline void crypto_notify(unsigned long val, void *v)
 136{
 137        blocking_notifier_call_chain(&crypto_chain, val, v);
 138}
 139
 140#endif  /* _CRYPTO_INTERNAL_H */
 141
 142