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