LXR RHEL5/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#include <linux/crypto.h>
  16#include <linux/mm.h>
  17#include <linux/highmem.h>
  18#include <linux/interrupt.h>
  19#include <linux/init.h>
  20#include <linux/list.h>
  21#include <linux/kernel.h>
  22#include <linux/rwsem.h>
  23#include <linux/slab.h>
  24#include <asm/kmap_types.h>
  25
  26extern struct list_head crypto_alg_list;
  27extern struct rw_semaphore crypto_alg_sem;
  28
  29extern enum km_type crypto_km_types[];
  30
  31static inline enum km_type crypto_kmap_type(int out)
  32{
  33        return crypto_km_types[(in_softirq() ? 2 : 0) + out];
  34}
  35
  36static inline void *crypto_kmap(struct page *page, int out)
  37{
  38        return kmap_atomic(page, crypto_kmap_type(out));
  39}
  40
  41static inline void crypto_kunmap(void *vaddr, int out)
  42{
  43        kunmap_atomic(vaddr, crypto_kmap_type(out));
  44}
  45
  46static inline void crypto_yield(struct crypto_tfm *tfm)
  47{
  48        if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
  49                cond_resched();
  50}
  51
  52#ifdef CONFIG_CRYPTO_HMAC
  53int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
  54void crypto_free_hmac_block(struct crypto_tfm *tfm);
  55#else
  56static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
  57{
  58        return 0;
  59}
  60
  61static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
  62{ }
  63#endif
  64
  65#ifdef CONFIG_PROC_FS
  66void __init crypto_init_proc(void);
  67#else
  68static inline void crypto_init_proc(void)
  69{ }
  70#endif
  71
  72static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
  73                                                 int flags)
  74{
  75        return alg->cra_ctxsize;
  76}
  77
  78static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
  79                                                 int flags)
  80{
  81        unsigned int len = alg->cra_ctxsize;
  82        
  83        switch (flags & CRYPTO_TFM_MODE_MASK) {
  84        case CRYPTO_TFM_MODE_CBC:
  85                len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
  86                len += alg->cra_blocksize;
  87                break;
  88        }
  89
  90        return len;
  91}
  92
  93static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
  94                                                   int flags)
  95{
  96        return alg->cra_ctxsize;
  97}
  98
  99int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
 100int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
 101int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
 102
 103int crypto_init_digest_ops(struct crypto_tfm *tfm);
 104int crypto_init_cipher_ops(struct crypto_tfm *tfm);
 105int crypto_init_compress_ops(struct crypto_tfm *tfm);
 106
 107void crypto_exit_digest_ops(struct crypto_tfm *tfm);
 108void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
 109void crypto_exit_compress_ops(struct crypto_tfm *tfm);
 110
 111#endif  /* _CRYPTO_INTERNAL_H */
 112
 113