import javax.crypto.*;
import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;
import java.security.InvalidKeyException;
/**
* Created by IntelliJ IDEA.
* User: LEO
* Date: 2005-11-30
* Time: 11:19:23
*/
public class EncryptDecryptData{
static String str = "南京金脈博通";
public static void main(String[] args) {
System.out.println("明文");
System.out.println(str);
byte[] str1 = new byte[0];
KeyGenerator keygen = null;
SecretKey secretkey = null;
try {
str1 = str.getBytes("gb2312");
keygen = KeyGenerator.getInstance("DESede");
keygen.init(168);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
secretkey = keygen.generateKey();
byte[] kb = secretkey.getEncoded();
int i=0;
System.out.println("密鑰");
for(i=0;i<kb.length;i++)
{
System.out.print(kb[i]+",");
}
Cipher cipher = null;
byte[] encrypted = new byte[0];
try {
cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE,secretkey);
encrypted = cipher.doFinal(str1);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
System.out.println();
System.out.println("密文");
for(i=0;i<encrypted.length;i++)
{
System.out.print(encrypted[i]+",");
}
byte[] decrypted = new byte[0];
try {
cipher.init(Cipher.DECRYPT_MODE,secretkey);
decrypted = cipher.doFinal(encrypted);
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
String str2 = new String(decrypted);
System.out.println("解密后的原文");
System.out.println(str2);
}
}
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