src/external/heimdal/hcrypto/hash.h

   1 /*
   2  * Copyright (c) 1999 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of KTH nor the names of its contributors may be
  18  *    used to endorse or promote products derived from this software without
  19  *    specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
  32
  33 /* $Id$ */
  34
  35 /* stuff in common between md4, md5, and sha1 */
  36
  37 #ifndef __hash_h__
  38 #define __hash_h__
  39
  40 #ifdef KRB5
  41 #include <krb5-types.h>
  42 #endif
  43 #include <roken.h>
  44
  45 #ifndef min
  46 #define min(a,b) (((a)>(b))?(b):(a))
  47 #endif
  48
  49 /* Vector Crays doesn't have a good 32-bit type, or more precisely,
  50    int32_t as defined by <bind/bitypes.h> isn't 32 bits, and we don't
  51    want to depend in being able to redefine this type.  To cope with
  52    this we have to clamp the result in some places to [0,2^32); no
  53    need to do this on other machines.  Did I say this was a mess?
  54    */
  55
  56 #ifdef _CRAY
  57 #define CRAYFIX(X) ((X) & 0xffffffff)
  58 #else
  59 #define CRAYFIX(X) (X)
  60 #endif
  61
  62 static inline uint32_t
  63 cshift (uint32_t x, unsigned int n)
  64 {
  65     x = CRAYFIX(x);
  66     return CRAYFIX((x << n) | (x >> (32 - n)));
  67 }
  68
  69 static inline uint64_t
  70 cshift64 (uint64_t x, unsigned int n)
  71 {
  72   return ((uint64_t)x << (uint64_t)n) | ((uint64_t)x >> ((uint64_t)64 - (uint64_t)n));
  73 }
  74
  75 #endif /* __hash_h__ */