/* 
** **************************************************************************
** md5.h -- Header file for implementation of MD5 Message Digest Algorithm **
** Updated: 2/13/90 by Ronald L. Rivest                                    **
** (C) 1990 RSA Data Security, Inc.                                        **
** **************************************************************************
*/

#ifndef MD5_H
#define MD5_H

#ifdef __cplusplus
extern "C" {
#endif


/* MDstruct is the data structure for a message digest computation.
*/
typedef struct {
  unsigned int buffer[4];    /* Holds 4-word result of MD computation */
  unsigned char count[8];    /* Number of bits processed so far */
  unsigned int done;         /* Nonzero means MD computation finished */
} MDstruct, *MDptr;

/* MDbegin(MD)
** Input: MD -- an MDptr
** Initialize the MDstruct prepatory to doing a message digest computation.
*/
extern void MDbegin (MDptr);

/* MDupdate(MD,X,count)
** Input: MD -- an MDptr
**        X -- a pointer to an array of unsigned characters.
**        count -- the number of bits of X to use (an unsigned int).
** Updates MD using the first ``count'' bits of X.
** The array pointed to by X is not modified.
** If count is not a multiple of 8, MDupdate uses high bits of last byte.
** This is the basic input routine for a user.
** The routine terminates the MD computation when count < 512, so
** every MD computation should end with one call to MDupdate with a
** count less than 512.  Zero is OK for a count.
*/
extern int MDupdate (MDptr, unsigned char *, unsigned int);

/* MDprint(MD)
** Input: MD -- an MDptr
** Prints message digest buffer MD as 32 hexadecimal digits.
** Order is from low-order byte of buffer[0] to high-order byte of buffer[3].
** Each byte is printed with high-order hexadecimal digit first.
*/
extern void MDprint (MDptr);

int MDchecksum(u_char *data, size_t len, u_char *mac, size_t maclen);
int  MDsign(u_char *data, size_t len, u_char *mac, size_t maclen,
            u_char *secret, size_t secretlen);
void MDget(MDstruct *MD, u_char *buf, size_t buflen);

/* 
** End of md5.h
****************************(cut)*****************************************/
#ifdef __cplusplus
}
#endif

#endif /* MD5_H */