common/hash_md5.h

   1 /*
   2  * This is the header file for the MD5 message-digest algorithm.
   3  * The algorithm is due to Ron Rivest.  This code was
   4  * written by Colin Plumb in 1993, no copyright is claimed.
   5  * This code is in the public domain; do with it what you wish.
   6  *
   7  * Equivalent code is available from RSA Data Security, Inc.
   8  * This code has been tested against that, and is equivalent,
   9  * except that you don't need to include two pages of legalese
  10  * with every copy.
  11  *
  12  * To compute the message digest of a chunk of bytes, declare an
  13  * MD5Context structure, pass it to MD5Init, call MD5Update as
  14  * needed on buffers full of bytes, and then call MD5Final, which
  15  * will fill a supplied 16-byte array with the digest.
  16  *
  17  * Changed so as no longer to depend on Colin Plumb's `usual.h'
  18  * header definitions; now uses stuff from dpkg's config.h
  19  *  - Ian Jackson <ian@chiark.greenend.org.uk>.
  20  * Still in the public domain.
  21  */
  22
  23 #ifndef MD5_H
  24 #define MD5_H
  25
  26 #include "common.h"
  27
  28 #ifdef _WIN32
  29 typedef unsigned long uint32;
  30 #define UWORD32 uint32
  31
  32 #else /* _WIN32 */
  33
  34 #ifdef _SUNOS
  35 typedef unsigned int uint32;
  36 #define UWORD32 uint32
  37 #else
  38 #define UWORD32 u_int32_t
  39 #endif /* _SUNOS */
  40
  41 #endif /* _WIN32 */
  42
  43 /* Determine Endianness */
  44 #if BYTE_ORDER == LITTLE_ENDIAN
  45         /* 1234 machines */
  46 #elif BYTE_ORDER == BIG_ENDIAN
  47         /* 4321 machines */
  48 # define WORDS_BIGENDIAN 1
  49 #elif BYTE_ORDER == PDP_ENDIAN
  50         /* 3412 machines */
  51 #error PDP endianness not supported yet!
  52 #else
  53 #error unknown endianness!
  54 #endif
  55
  56 #define md5byte unsigned char
  57
  58 struct MD5Context {
  59         UWORD32 buf[4];
  60         UWORD32 bytes[2];
  61         UWORD32 in[16];
  62 };
  63
  64 void MD5Init(struct MD5Context *context);
  65 void MD5Update(struct MD5Context *context, md5byte const *buf, unsigned len);
  66 void MD5Final(unsigned char digest[16], struct MD5Context *context);
  67 void MD5Transform(UWORD32 buf[4], UWORD32 const in[16]);
  68
  69 #endif /* !MD5_H */