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AES Encryption
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class AESDecrypt {
private static final byte[] SALT = {(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03};
private static final int ITERATION_COUNT = 65536;
private static final int KEY_LENGTH = 128;
private static final int IV_LENGTH = 16;
private Cipher eCipher;
private Cipher dCipher;
private byte[] encrypt;
AESDecrypt(String passPhrase, String encryptedString) throws Exception {
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), SALT, ITERATION_COUNT, KEY_LENGTH);
SecretKey secretKeyTemp = secretKeyFactory.generateSecret(keySpec);
SecretKey secretKey = new SecretKeySpec(secretKeyTemp.getEncoded(), "AES");
encrypt = Base64.decodeBase64(encryptedString);
eCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
eCipher.init(Cipher.ENCRYPT_MODE, secretKey);
byte[] iv = extractIV();
dCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
dCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv));
}
private byte[] extractIV() {
byte[] iv = new byte[IV_LENGTH];
System.arraycopy(encrypt, 0, iv, 0, iv.length);
return iv;
}
public String decrypt() throws Exception {
byte[] bytes = extractCipherText();
byte[] decrypted = decrypt(bytes);
return new String(decrypted, "UTF8");
}
private byte[] extractCipherText() {
byte[] ciphertext = new byte[encrypt.length - IV_LENGTH];
System.arraycopy(encrypt, 16, ciphertext, 0, ciphertext.length);
return ciphertext;
}
public byte[] decrypt(byte[] encrypt) throws Exception {
return dCipher.doFinal(encrypt);
}
public static void main(String[] args) throws Exception {
String passphrase = "PASSWORDPASSPHRASE";
String encryptedPassword = "LiN1KmaB2Pl7cooe3qvuImbAKXsVJt5oxt+ajuVZ5n4=";
AESDecrypt aesDecrypt = new AESDecrypt(passphrase, encryptedPassword);
String decryptedPassword = aesDecrypt.decrypt();
System.out.println("decryptedPasswpord = " + decryptedPassword);
}
}
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class AESEncrypt {
private static final byte[] SALT = {(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03};
private static final int ITERATION_COUNT = 65536;
private static final int KEY_LENGTH = 128;
private Cipher eCipher;
private Cipher dCipher;
private byte[] iv;
AESEncrypt(String passPhrase) throws Exception {
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), SALT, ITERATION_COUNT, KEY_LENGTH);
SecretKey secretKeyTemp = secretKeyFactory.generateSecret(keySpec);
SecretKey secretKey = new SecretKeySpec(secretKeyTemp.getEncoded(), "AES");
eCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
eCipher.init(Cipher.ENCRYPT_MODE, secretKey);
dCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
iv = eCipher.getParameters().getParameterSpec(IvParameterSpec.class).getIV();
dCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv));
}
public String encrypt(String encrypt) throws Exception {
byte[] bytes = encrypt.getBytes("UTF8");
byte[] encrypted = encrypt(bytes);
byte[] cipherText = new byte[encrypted.length + iv.length];
System.arraycopy(iv, 0, cipherText, 0, iv.length);
System.arraycopy(encrypted, 0, cipherText, iv.length, encrypted.length);
return new String(Base64.encodeBase64(cipherText));
}
public byte[] encrypt(byte[] plain) throws Exception {
return eCipher.doFinal(plain);
}
public static void main(String[] args) throws Exception {
String passphrase = "PASSWORDPASSPHRASE";
String password = "password123";
AESEncrypt aesEncrypt = new AESEncrypt(passphrase);
String encryptedPassword = aesEncrypt.encrypt(password);
System.out.println("encryptedPassword = " + encryptedPassword);
}
}
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