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