linux/crypto/internal.h
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   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_alg_tested(const char *name, int err);
  87
  88void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  89                          struct crypto_alg *nalg);
  90void crypto_remove_final(struct list_head *list);
  91void crypto_shoot_alg(struct crypto_alg *alg);
  92struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  93                                      u32 mask);
  94void *crypto_create_tfm(struct crypto_alg *alg,
  95                        const struct crypto_type *frontend);
  96struct crypto_alg *crypto_find_alg(const char *alg_name,
  97                                   const struct crypto_type *frontend,
  98                                   u32 type, u32 mask);
  99void *crypto_alloc_tfm(const char *alg_name,
 100                       const struct crypto_type *frontend, u32 type, u32 mask);
 101
 102int crypto_register_notifier(struct notifier_block *nb);
 103int crypto_unregister_notifier(struct notifier_block *nb);
 104int crypto_probing_notify(unsigned long val, void *v);
 105
 106static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 107{
 108        atomic_inc(&alg->cra_refcnt);
 109        return alg;
 110}
 111
 112static inline void crypto_alg_put(struct crypto_alg *alg)
 113{
 114        if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 115                alg->cra_destroy(alg);
 116}
 117
 118static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 119{
 120        return try_module_get(tmpl->module);
 121}
 122
 123static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 124{
 125        module_put(tmpl->module);
 126}
 127
 128static inline int crypto_is_larval(struct crypto_alg *alg)
 129{
 130        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 131}
 132
 133static inline int crypto_is_dead(struct crypto_alg *alg)
 134{
 135        return alg->cra_flags & CRYPTO_ALG_DEAD;
 136}
 137
 138static inline int crypto_is_moribund(struct crypto_alg *alg)
 139{
 140        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 141}
 142
 143static inline void crypto_notify(unsigned long val, void *v)
 144{
 145        blocking_notifier_call_chain(&crypto_chain, val, v);
 146}
 147
 148#endif  /* _CRYPTO_INTERNAL_H */
 149
 150
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