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#ifdef CONFIG_CRYPTO_FIPS
  30extern int fips_enabled;
  31#else
  32#define fips_enabled 0
  33#endif
  34
  35/* Crypto notification events. */
  36enum {
  37        CRYPTO_MSG_ALG_REQUEST,
  38        CRYPTO_MSG_ALG_REGISTER,
  39        CRYPTO_MSG_ALG_UNREGISTER,
  40        CRYPTO_MSG_TMPL_REGISTER,
  41        CRYPTO_MSG_TMPL_UNREGISTER,
  42};
  43
  44struct crypto_instance;
  45struct crypto_template;
  46
  47struct crypto_larval {
  48        struct crypto_alg alg;
  49        struct crypto_alg *adult;
  50        struct completion completion;
  51        u32 mask;
  52};
  53
  54extern struct list_head crypto_alg_list;
  55extern struct rw_semaphore crypto_alg_sem;
  56extern struct blocking_notifier_head crypto_chain;
  57
  58#ifdef CONFIG_PROC_FS
  59void __init crypto_init_proc(void);
  60void __exit crypto_exit_proc(void);
  61#else
  62static inline void crypto_init_proc(void)
  63{ }
  64static inline void crypto_exit_proc(void)
  65{ }
  66#endif
  67
  68static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
  69{
  70        unsigned int len = alg->cra_ctxsize;
  71
  72        if (alg->cra_alignmask) {
  73                len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
  74                len += alg->cra_digest.dia_digestsize;
  75        }
  76
  77        return len;
  78}
  79
  80static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  81{
  82        return alg->cra_ctxsize;
  83}
  84
  85static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  86{
  87        return alg->cra_ctxsize;
  88}
  89
  90struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  91struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
  92struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  93
  94int crypto_init_digest_ops(struct crypto_tfm *tfm);
  95int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
  96int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  97int crypto_init_compress_ops(struct crypto_tfm *tfm);
  98
  99void crypto_exit_digest_ops(struct crypto_tfm *tfm);
 100void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
 101void crypto_exit_compress_ops(struct crypto_tfm *tfm);
 102
 103struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
 104void crypto_larval_kill(struct crypto_alg *alg);
 105struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
 106void crypto_larval_error(const char *name, u32 type, u32 mask);
 107void crypto_alg_tested(const char *name, int err);
 108
 109void crypto_shoot_alg(struct crypto_alg *alg);
 110struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 111                                      u32 mask);
 112void *crypto_create_tfm(struct crypto_alg *alg,
 113                        const struct crypto_type *frontend);
 114void *crypto_alloc_tfm(const char *alg_name,
 115                       const struct crypto_type *frontend, u32 type, u32 mask);
 116
 117int crypto_register_instance(struct crypto_template *tmpl,
 118                             struct crypto_instance *inst);
 119
 120int crypto_register_notifier(struct notifier_block *nb);
 121int crypto_unregister_notifier(struct notifier_block *nb);
 122int crypto_probing_notify(unsigned long val, void *v);
 123
 124static inline void crypto_alg_put(struct crypto_alg *alg)
 125{
 126        if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 127                alg->cra_destroy(alg);
 128}
 129
 130static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 131{
 132        return try_module_get(tmpl->module);
 133}
 134
 135static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 136{
 137        module_put(tmpl->module);
 138}
 139
 140static inline int crypto_is_larval(struct crypto_alg *alg)
 141{
 142        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 143}
 144
 145static inline int crypto_is_dead(struct crypto_alg *alg)
 146{
 147        return alg->cra_flags & CRYPTO_ALG_DEAD;
 148}
 149
 150static inline int crypto_is_moribund(struct crypto_alg *alg)
 151{
 152        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 153}
 154
 155static inline void crypto_notify(unsigned long val, void *v)
 156{
 157        blocking_notifier_call_chain(&crypto_chain, val, v);
 158}
 159
 160#endif  /* _CRYPTO_INTERNAL_H */
 161
 162