#ifndef __LIB_4__
#define __LIB_4__

#include "sha1.h"
// sha1 constants


int aes_ctr_edit(char *ciphertext, int ciphertext_length, int offset, char *newtext);
void sha1_hmac(unsigned int *mac, unsigned char *message, unsigned int msg_len, unsigned char *key,
		unsigned int key_len);
int sha1_hmac_verify(unsigned int *mac, unsigned char *msg, unsigned int msg_len,
		unsigned char *key, unsigned int key_len);
#endif