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
  26 extern struct list_head crypto_alg_list;
  27 extern struct rw_semaphore crypto_alg_sem;
  28
  29 extern enum km_type crypto_km_types[];
  30
  31 static inline enum km_type crypto_kmap_type(int out)
  32 {
  33         return crypto_km_types[(in_softirq() ? 2 : 0) + out];
  34 }
  35
  36 static inline void *crypto_kmap(struct page *page, int out)
  37 {
  38         return kmap_atomic(page, crypto_kmap_type(out));
  39 }
  40
  41 static inline void crypto_kunmap(void *vaddr, int out)
  42 {
  43         kunmap_atomic(vaddr, crypto_kmap_type(out));
  44 }
  45
  46 static 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
  53 int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
  54 void crypto_free_hmac_block(struct crypto_tfm *tfm);
  55 #else
  56 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
  57 {
  58         return 0;
  59 }
  60
  61 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
  62 { }
  63 #endif
  64
  65 #ifdef CONFIG_PROC_FS
  66 void __init crypto_init_proc(void);
  67 #else
  68 static inline void crypto_init_proc(void)
  69 { }
  70 #endif
  71
  72 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
  73                                                  int flags)
  74 {
  75         return alg->cra_ctxsize;
  76 }
  77
  78 static 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
  93 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
  94                                                    int flags)
  95 {
  96         return alg->cra_ctxsize;
  97 }
  98
  99 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
 100 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
 101 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
 102
 103 int crypto_init_digest_ops(struct crypto_tfm *tfm);
 104 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
 105 int crypto_init_compress_ops(struct crypto_tfm *tfm);
 106
 107 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
 108 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
 109 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
 110
 111 #endif  /* _CRYPTO_INTERNAL_H */
 112