import
java.security.Key;
import
java.util.Arrays;
import
javax.crypto.Cipher;
import
javax.crypto.SecretKey;
import
javax.crypto.spec.IvParameterSpec;
import
javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;
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public static void main(String[]
args) {
String
yourOwnKey = "ASDFGHJKLZXCVBNMQWERTYUI", originalText
= "Give
your text to encrypt.";
decrypt(encrypt(originalText,
yourOwnKey), yourOwnKey);
}
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public static String
encrypt(String originalText,
String yourOwnKey) {
String
encryptedText = null;
byte[] bytes = null;
try {
bytes
= originalText.getBytes();
bytes = Arrays.copyOf(bytes,
((bytes.length + 7) / 8) * 8);
Cipher
cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
SecretKey
key = new SecretKeySpec(yourOwnKey.getBytes(), "DESede");
IvParameterSpec
iv = new IvParameterSpec(new byte[8]);
cipher.init(Cipher.ENCRYPT_MODE, (Key) key,
iv);
byte[] encryptByte
= cipher.doFinal(bytes);
encryptedText = new String(Hex.encodeHex(encryptByte));
System.out.println("originalText:
" +originalText+
"
--> encryptedText: " + encryptedText);
} catch (Exception e)
{
//throw ||
log
}
return
encryptedText;
}
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public static String
decrypt(String encryptedTxt, String yourOwnKey) {
String
decryptedText = null;
byte[] bytes = null;
try {
bytes
= Hex.decodeHex(encryptedTxt.toCharArray());
Cipher
cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
SecretKey
key = new SecretKeySpec(yourOwnKey.getBytes(), "DESede");
IvParameterSpec
iv = new IvParameterSpec(new byte[8]);
cipher.init(Cipher.DECRYPT_MODE, (Key) key,
iv);
byte[] decryptByte
= cipher.doFinal(bytes);
decryptedText
= new String(decryptByte);
if
(decryptedText.indexOf((char) 0) > 0)
decryptedText
= decryptedText.substring(0, decryptedText.indexOf((char) 0));
System.out.println("encryptedTxt:
" +encryptedTxt+ " --> decryptedText: " +
decryptedText);
} catch (Exception e)
{
//throw ||
log
}
return
decryptedText;
}
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