} MD5_CTX;
void MD5_Init(MD5_CTX *c);
-void MD5_Update(MD5_CTX *c, const unsigned char *data, unsigned long len);
+void MD5_Update(MD5_CTX *c, const void *data, unsigned long len);
void MD5_Final(unsigned char *md, MD5_CTX *c);
-unsigned char *MD5(unsigned char *d, unsigned long n, unsigned char *md);
-void MD5_Transform(MD5_CTX *c, unsigned char *b);
+unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md);
+void MD5_Transform(MD5_CTX *c, const unsigned char *b);
#ifdef __cplusplus
}
#endif