[wildfly] Blowfish 암호화/복호화

SecureIdentityLoginCoder.jar

0.00MB

 

 

 

Usage:  java -jar SecureIdentityLoginCoder.jar -e|-d string
  -e will encode the string
  -d will decode the string

알고리즘 "Blowfish"

암호화
$ java -jar SecureIdentityLoginCoder.jar -e 'test'
48e90df5bc00051e

복호화
$ java -jar SecureIdentityLoginCoder.jar -d '48e90df5bc00051e'
test

DecodeIdentity.java

import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

public class DecodeIdentity {

    private static String encode(String secret) throws NoSuchPaddingException, NoSuchAlgorithmException,InvalidKeyException, BadPaddingException, IllegalBlockSizeException{
    byte[] kbytes = "jaas is the way".getBytes();
    SecretKeySpec key = new SecretKeySpec(kbytes, "Blowfish");
    Cipher cipher = Cipher.getInstance("Blowfish");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] encoding = cipher.doFinal(secret.getBytes());
    BigInteger n = new BigInteger(encoding);
    return n.toString(16);
    }

   private static char[] decode(String secret)throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException{
   byte[] kbytes = "jaas is the way".getBytes();
   SecretKeySpec key = new SecretKeySpec(kbytes, "Blowfish");
   BigInteger n = new BigInteger(secret, 16);
   byte[] encoding = n.toByteArray();
   if (encoding.length % 8 != 0){
       int length = encoding.length;
       int newLength = ((length / 8) +1) * 8;
       int pad = newLength - length; //number of leading zeros
       byte[] old = encoding;
       encoding = new byte[newLength];
       for (int i = old.length - 1; i>= 0; i--){
          encoding[i + pad] = old[i];
       }
       if (n.signum() == -1){
          for (int i = 0; i < newLength - length; i++){
             encoding[i] = (byte) -1;
          }
      }
    }
    Cipher cipher = Cipher.getInstance("Blowfish");
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] decode = cipher.doFinal(encoding);
    return new String(decode).toCharArray();
  }
  public static void main(String[] args) throws Exception{
     if(args.length ==2){
        if (args[0].equals("encode")){
        String encode = encode(args[1]);
        System.out.println("Encoded password: " + encode);
     }else if (args[0].equals("decode")){
      System.out.println(decode(args[1]));
     }else{
          System.out.println("Function not defined");
     }
   }
  }
}