md5_utils.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
  19  *  - Ian Jackson <ian@chiark.greenend.org.uk>.
  20  * Still in the public domain.
  21  */
  22
  23 #ifndef MD5_UTILS_H_
  24 #define MD5_UTILS_H_
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 #define md5byte unsigned char
  31 #define UWORD32 unsigned int
  32
  33 typedef struct MD5Context MD5Context;
  34 struct MD5Context {
  35   UWORD32 buf[4];
  36   UWORD32 bytes[2];
  37   UWORD32 in[16];
  38 };
  39
  40 void MD5Init(struct MD5Context *context);
  41 void MD5Update(struct MD5Context *context, md5byte const *buf, unsigned len);
  42 void MD5Final(unsigned char digest[16], struct MD5Context *context);
  43 void MD5Transform(UWORD32 buf[4], UWORD32 const in[16]);
  44
  45 #ifdef __cplusplus
  46 }  // extern "C"
  47 #endif
  48
  49 #endif  // MD5_UTILS_H_