pppd/md4.h

   1
   2 /*
   3 ** ********************************************************************
   4 ** md4.h -- Header file for implementation of                        **
   5 ** MD4 Message Digest Algorithm                                      **
   6 ** Updated: 2/13/90 by Ronald L. Rivest                              **
   7 ** (C) 1990 RSA Data Security, Inc.                                  **
   8 ** ********************************************************************
   9 */
  10
  11 #ifndef __P
  12 # if defined(__STDC__) || defined(__GNUC__)
  13 #  define __P(x) x
  14 # else
  15 #  define __P(x) ()
  16 # endif
  17 #endif
  18
  19
  20 /* MDstruct is the data structure for a message digest computation.
  21 */
  22 typedef struct {
  23         unsigned int buffer[4]; /* Holds 4-word result of MD computation */
  24         unsigned char count[8]; /* Number of bits processed so far */
  25         unsigned int done;      /* Nonzero means MD computation finished */
  26 } MD4_CTX;
  27
  28 /* MD4Init(MD4_CTX *)
  29 ** Initialize the MD4_CTX prepatory to doing a message digest
  30 ** computation.
  31 */
  32 extern void MD4Init __P((MD4_CTX *MD));
  33
  34 /* MD4Update(MD,X,count)
  35 ** Input: X -- a pointer to an array of unsigned characters.
  36 **        count -- the number of bits of X to use (an unsigned int).
  37 ** Updates MD using the first "count" bits of X.
  38 ** The array pointed to by X is not modified.
  39 ** If count is not a multiple of 8, MD4Update uses high bits of
  40 ** last byte.
  41 ** This is the basic input routine for a user.
  42 ** The routine terminates the MD computation when count < 512, so
  43 ** every MD computation should end with one call to MD4Update with a
  44 ** count less than 512.  Zero is OK for a count.
  45 */
  46 extern void MD4Update __P((MD4_CTX *MD, unsigned char *X, unsigned int count));
  47
  48 /* MD4Print(MD)
  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 MD4Print __P((MD4_CTX *));
  55
  56 /* MD4Final(buf, MD)
  57 ** Returns message digest from MD and terminates the message
  58 ** digest computation.
  59 */
  60 extern void MD4Final __P((unsigned char *, MD4_CTX *));
  61
  62 /*
  63 ** End of md4.h
  64 ****************************(cut)***********************************/