Ultra Geile Studenten Benutzer Oberfläche (UGSBO)
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
package ugsbo.com.buchhaltung;
import java.security.MessageDigest;
public class Block {
int data; int kontostand; Block vorher; String ownHash; String previousHash; //erste Block
public Block(int data) { this.data = data; ownHash = createNewHash(Integer.toString(data)); kontostand = this.data; this.vorher = null; this.previousHash = null; }
//Alle anderen Blöcke
public Block(int data, Block vorher, String previousHash, int konto) { this.data = data; ownHash = createNewHash(Integer.toString(data)+previousHash); kontostand = konto + this.data; this.vorher = vorher; this.previousHash = previousHash; } private String createNewHash(String input) { try { MessageDigest digest = MessageDigest.getInstance("SHA-256"); //Applies sha256 to our input,
byte[] hash = digest.digest(input.getBytes("UTF-8")); StringBuffer hexString = new StringBuffer(); // This will contain hash as hexidecimal
for (int i = 0; i < hash.length; i++) { String hex = Integer.toHexString(0xff & hash[i]); if(hex.length() == 1) hexString.append('0'); hexString.append(hex); } return hexString.toString(); } catch(Exception e) { throw new RuntimeException(e); } } public int getKontostand() { return kontostand; } public Block getVorher() { return vorher; } public String getHash() { return ownHash; } }
|