LXR RHEL4/crypto/internal.h

   1/*
   2 * Cryptographic API.
   3 *
   4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the Free
   8 * Software Foundation; either version 2 of the License, or (at your option) 
   9 * any later version.
  10 *
  11 */
  12#ifndef _CRYPTO_INTERNAL_H
  13#define _CRYPTO_INTERNAL_H
  14#include <linux/crypto.h>
  15#include <linux/mm.h>
  16#include <linux/highmem.h>
  17#include <linux/interrupt.h>
  18#include <linux/init.h>
  19#include <linux/kmod.h>
  20#include <asm/kmap_types.h>
  21
  22extern enum km_type crypto_km_types[];
  23
  24static inline enum km_type crypto_kmap_type(int out)
  25{
  26        return crypto_km_types[(in_softirq() ? 2 : 0) + out];
  27}
  28
  29static inline void *crypto_kmap(struct page *page, int out)
  30{
  31        return kmap_atomic(page, crypto_kmap_type(out));
  32}
  33
  34static inline void crypto_kunmap(void *vaddr, int out)
  35{
  36        kunmap_atomic(vaddr, crypto_kmap_type(out));
  37}
  38
  39static inline void crypto_yield(struct crypto_tfm *tfm)
  40{
  41        if (!in_softirq())
  42                cond_resched();
  43}
  44
  45static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
  46{
  47        return (void *)&tfm[1];
  48}
  49
  50struct crypto_alg *crypto_alg_lookup(const char *name);
  51
  52/* A far more intelligent version of this is planned.  For now, just
  53 * try an exact match on the name of the algorithm. */
  54static inline struct crypto_alg *crypto_alg_mod_lookup(const char *name)
  55{
  56        return try_then_request_module(crypto_alg_lookup(name), name);
  57}
  58
  59#ifdef CONFIG_CRYPTO_HMAC
  60int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
  61void crypto_free_hmac_block(struct crypto_tfm *tfm);
  62#else
  63static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
  64{
  65        return 0;
  66}
  67
  68static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
  69{ }
  70#endif
  71
  72#ifdef CONFIG_PROC_FS
  73void __init crypto_init_proc(void);
  74#else
  75static inline void crypto_init_proc(void)
  76{ }
  77#endif
  78
  79int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
  80int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
  81int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
  82
  83int crypto_init_digest_ops(struct crypto_tfm *tfm);
  84int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  85int crypto_init_compress_ops(struct crypto_tfm *tfm);
  86
  87void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  88void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  89void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  90
  91#endif  /* _CRYPTO_INTERNAL_H */
  92
  93