md5.h

/* typedef a 32 bit type */
typedef unsigned long int UINT_32;

/* Data structure for MD5 (Message Digest) computation */
typedef struct {
  UINT_32 i[2];                   /* number of _bits_ handled mod 2^64 */
  UINT_32 buf[4];                                    /* scratch buffer */
  unsigned char in[64];                              /* input buffer */
  unsigned char digest[16];     /* actual digest after MD5Final call */
} MD5_CTX;

void MD5Final(MD5_CTX *);
void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
void MD5Init(MD5_CTX *);