} MD4_CTX;
int MD4_Init(MD4_CTX *c);
-int MD4_Update(MD4_CTX *c, const void *data, unsigned long len);
+int MD4_Update(MD4_CTX *c, const void *data, size_t len);
int MD4_Final(unsigned char *md, MD4_CTX *c);
-unsigned char *MD4(const unsigned char *d, unsigned long n, unsigned char *md);
+unsigned char *MD4(const unsigned char *d, size_t n, unsigned char *md);
void MD4_Transform(MD4_CTX *c, const unsigned char *b);
#ifdef __cplusplus
}