main.java

提供JAVA源码

/*
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 */

package deslab;

/**
 *
 * @author Fredrik
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        long plaintext,ciphertext,key;
        
        //performs three encryptions and decryptions
        //the values are taken from http://www.skepticfiles.org/faq/testdes.htm
        
        //run the first test message
        key=0x0101010101010101l;
        plaintext=0x95F8A5E5DD31D900l;
        DES cipher=new DES(key);
        ciphertext=cipher.encrypt(plaintext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plaintext,ciphertext);
        long plain2=cipher.decrypt(ciphertext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plain2,ciphertext);
        
        //run the second test message
        plaintext=0x0000000000000000l;
        key=0x8001010101010101l;
        DES cipher2=new DES(key);
        ciphertext=cipher2.encrypt(plaintext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plaintext,ciphertext);
        plain2=cipher2.decrypt(ciphertext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plain2,ciphertext);
        
        //run the third test message
        plaintext=0x01A1D6D039776742l;
        key=0x7CA110454A1A6E57l;
        DES cipher3=new DES(key);
        ciphertext=cipher3.encrypt(plaintext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plaintext,ciphertext);
        plain2=cipher3.decrypt(ciphertext);
        System.out.printf("key=%016x\tplaintext=%016x\tciphertext=%016x\n",key,plain2,ciphertext);
        
    }

}