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/mm.h>
  15 #include <linux/highmem.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/init.h>
  18 #include <asm/hardirq.h>
  19 #include <asm/kmap_types.h>
  20
  21 extern enum km_type crypto_km_types[];
  22
  23 static inline enum km_type crypto_kmap_type(int out)
  24 {
  25         return crypto_km_types[(in_softirq() ? 2 : 0) + out];
  26 }
  27
  28 static inline void *crypto_kmap(struct page *page, int out)
  29 {
  30         return kmap_atomic(page, crypto_kmap_type(out));
  31 }
  32
  33 static inline void crypto_kunmap(void *vaddr, int out)
  34 {
  35         kunmap_atomic(vaddr, crypto_kmap_type(out));
  36 }
  37
  38 static inline void crypto_yield(struct crypto_tfm *tfm)
  39 {
  40         if (!in_softirq())
  41                 cond_resched();
  42 }
  43
  44 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
  45 {
  46         return (void *)&tfm[1];
  47 }
  48
  49 struct crypto_alg *crypto_alg_lookup(const char *name);
  50
  51 #ifdef CONFIG_KMOD
  52 void crypto_alg_autoload(const char *name);
  53 struct crypto_alg *crypto_alg_mod_lookup(const char *name);
  54 #else
  55 static inline struct crypto_alg *crypto_alg_mod_lookup(const char *name)
  56 {
  57         return crypto_alg_lookup(name);
  58 }
  59 #endif
  60
  61 #ifdef CONFIG_CRYPTO_HMAC
  62 int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
  63 void crypto_free_hmac_block(struct crypto_tfm *tfm);
  64 #else
  65 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
  66 {
  67         return 0;
  68 }
  69
  70 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
  71 { }
  72 #endif
  73
  74 #ifdef CONFIG_PROC_FS
  75 void __init crypto_init_proc(void);
  76 #else
  77 static inline void crypto_init_proc(void)
  78 { }
  79 #endif
  80
  81 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
  82 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
  83 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
  84
  85 int crypto_init_digest_ops(struct crypto_tfm *tfm);
  86 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  87 int crypto_init_compress_ops(struct crypto_tfm *tfm);
  88
  89 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  90 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  91 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  92
  93 #endif  /* _CRYPTO_INTERNAL_H */
  94