xapian-applications/omega/md5.h

   1 /*
   2  * This code implements 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
  18 #ifndef OMEGA_INCLUDED_MD5_H
  19 #define OMEGA_INCLUDED_MD5_H
  20
  21 /* Minor tweaks for use from Omega:
  22  *
  23  * + Include <cstdint> to get uint32_t.
  24  * + uint32 -> uint32_t.
  25  * + MD5Transform is an internal helper so prototype moved to md5.cc.
  26  * + Removed MD5_CTX.
  27  * + Changed MD5Context.in to uint32_t instead of unsigned char.
  28  * + Added "OMEGA_INCLUDED_" prefix to header guard macro.
  29  */
  30
  31 // To get uint32_t:
  32 #include <cstdint>
  33 using std::uint32_t;
  34
  35 struct MD5Context {
  36     uint32_t buf[4];
  37     uint32_t bits[2];
  38     uint32_t in[16];
  39 };
  40
  41 void MD5Init(struct MD5Context *context);
  42 void MD5Update(struct MD5Context *context, unsigned char const *buf,
  43                unsigned len);
  44 void MD5Final(unsigned char digest[16], struct MD5Context *context);
  45
  46 #endif /* OMEGA_INCLUDED_MD5_H */