/* MD5 context. */
typedef struct {
    unsigned int state[4];		/* state (ABCD) */
    unsigned int count[2];		/* number of bits, modulo 2^64 (lsb first) */
    unsigned char buffer[64];	/* input buffer */
} MD5_CTX;

void MD5Init(MD5_CTX *);
void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
void MD5Final(unsigned char[16], MD5_CTX *);

#define MD5_DIGEST_CHARS         16