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
  29/* 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
  38struct crypto_instance;
  39struct crypto_template;
  40
  41struct crypto_larval {
  42        struct crypto_alg alg;
  43        struct crypto_alg *adult;
  44        struct completion completion;
  45        u32 mask;
  46};
  47
  48extern struct list_head crypto_alg_list;
  49extern struct rw_semaphore crypto_alg_sem;
  50extern struct blocking_notifier_head crypto_chain;
  51
  52#ifdef CONFIG_PROC_FS
  53void __init crypto_init_proc(void);
  54void __exit crypto_exit_proc(void);
  55#else
  56static inline void crypto_init_proc(void)
  57{ }
  58static inline void crypto_exit_proc(void)
  59{ }
  60#endif
  61
  62static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
  63{
  64        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;
  72}
  73
  74static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  75{
  76        return alg->cra_ctxsize;
  77}
  78
  79static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  80{
  81        return alg->cra_ctxsize;
  82}
  83
  84struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  85struct 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);
  87
  88int 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
  96void crypto_larval_kill(struct crypto_alg *alg);
  97struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
  98void crypto_larval_error(const char *name, u32 type, u32 mask);
  99
 100void crypto_shoot_alg(struct crypto_alg *alg);
 101struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 102                                      u32 mask);
 103
 104int crypto_register_instance(struct crypto_template *tmpl,
 105                             struct crypto_instance *inst);
 106
 107int crypto_register_notifier(struct notifier_block *nb);
 108int crypto_unregister_notifier(struct notifier_block *nb);
 109
 110static 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
 116static 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
 126static inline int crypto_is_larval(struct crypto_alg *alg)
 127{
 128        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 129}
 130
 131static 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
 141static inline int crypto_notify(unsigned long val, void *v)
 142{
 143        return blocking_notifier_call_chain(&crypto_chain, val, v);
 144}
 145
 146#endif  /* _CRYPTO_INTERNAL_H */
 147
 148