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
  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 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
  46 {
  47         return (void *)&tfm[1];
  48 }
  49
  50 struct 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. */
  54 static 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
  60 int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
  61 void crypto_free_hmac_block(struct crypto_tfm *tfm);
  62 #else
  63 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
  64 {
  65         return 0;
  66 }
  67
  68 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
  69 { }
  70 #endif
  71
  72 #ifdef CONFIG_PROC_FS
  73 void __init crypto_init_proc(void);
  74 #else
  75 static inline void crypto_init_proc(void)
  76 { }
  77 #endif
  78
  79 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
  80 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
  81 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
  82
  83 int crypto_init_digest_ops(struct crypto_tfm *tfm);
  84 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  85 int crypto_init_compress_ops(struct crypto_tfm *tfm);
  86
  87 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  88 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  89 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  90
  91 #endif  /* _CRYPTO_INTERNAL_H */
  92