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      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)***********************************/
     65