source/md4.h

   1 /*
   2    This code is from rfc1186.
   3 */
   4
   5  /*
   6  ** ********************************************************************
   7  ** md4.h -- Header file for implementation of                        **
   8  ** MD4 Message Digest Algorithm                                      **
   9  ** Updated: 2/13/90 by Ronald L. Rivest                              **
  10  ** (C) 1990 RSA Data Security, Inc.                                  **
  11  ** ********************************************************************
  12  */
  13
  14  /* MDstruct is the data structure for a message digest computation.
  15  */
  16  typedef struct {
  17    unsigned int buffer[4]; /* Holds 4-word result of MD computation */
  18    unsigned char count[8]; /* Number of bits processed so far */
  19    unsigned int done;      /* Nonzero means MD computation finished */
  20  } MDstruct, *MDptr;
  21
  22  /* MDbegin(MD)
  23
  24
  25
  26  ** Input: MD -- an MDptr
  27  ** Initialize the MDstruct prepatory to doing a message digest
  28  ** computation.
  29  */
  30  extern void MDbegin();
  31
  32  /* MDupdate(MD,X,count)
  33  ** Input: MD -- an MDptr
  34  **        X -- a pointer to an array of unsigned characters.
  35  **        count -- the number of bits of X to use (an unsigned int).
  36  ** Updates MD using the first "count" bits of X.
  37  ** The array pointed to by X is not modified.
  38  ** If count is not a multiple of 8, MDupdate uses high bits of
  39  ** last byte.
  40  ** This is the basic input routine for a user.
  41  ** The routine terminates the MD computation when count < 512, so
  42  ** every MD computation should end with one call to MDupdate with a
  43  ** count less than 512.  Zero is OK for a count.
  44  */
  45  extern void MDupdate();
  46
  47  /* MDprint(MD)
  48  ** Input: MD -- an MDptr
  49  ** Prints message digest buffer MD as 32 hexadecimal digits.
  50  ** Order is from low-order byte of buffer[0] to high-order byte
  51  ** of buffer[3].
  52  ** Each byte is printed with high-order hexadecimal digit first.
  53  */
  54  extern void MDprint();
  55
  56  /*
  57  ** End of md4.h
  58  */