Java Code Examples for javax.crypto.spec.SecretKeySpec#getEncoded()

/**
 * 加密
 *
 * @param data 需要加密的内容
 * @param key  加密密码
 * @return
 */
public static byte[] encrypt(byte[] data, byte[] key) {
    CheckUtils.notEmpty(data, "data");
    CheckUtils.notEmpty(key, "key");
    if (key.length != 16) {
        throw new RuntimeException("Invalid AES key length (must be 16 bytes)");
    }
    try {
        SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        byte[] enCodeFormat = secretKey.getEncoded();
        SecretKeySpec seckey = new SecretKeySpec(enCodeFormat, "AES");
        Cipher cipher = Cipher.getInstance(ConfigureEncryptAndDecrypt.AES_ALGORITHM);// 创建密码器
        IvParameterSpec iv = new IvParameterSpec(key);//使用CBC模式，需要一个向量iv，可增加加密算法的强度
        cipher.init(Cipher.ENCRYPT_MODE, seckey, iv);// 初始化
        byte[] result = cipher.doFinal(data);
        return result; // 加密
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException("encrypt fail!", e);
    }
}
 

/**
 * 解密
 *
 * @param data 待解密内容
 * @param key  解密密钥
 * @return
 */
public static byte[] decrypt(byte[] data, byte[] key) {
    CheckUtils.notEmpty(data, "data");
    CheckUtils.notEmpty(key, "key");
    if (key.length != 16) {
        throw new RuntimeException("Invalid AES key length (must be 16 bytes)");
    }
    try {
        SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        byte[] enCodeFormat = secretKey.getEncoded();
        SecretKeySpec seckey = new SecretKeySpec(enCodeFormat, "AES");
        Cipher cipher = Cipher.getInstance(ConfigureEncryptAndDecrypt.AES_ALGORITHM);// 创建密码器
        IvParameterSpec iv = new IvParameterSpec(key);//使用CBC模式，需要一个向量iv，可增加加密算法的强度
        cipher.init(Cipher.DECRYPT_MODE, seckey, iv);// 初始化
        byte[] result = cipher.doFinal(data);
        return result; // 解密
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException("decrypt fail!", e);
    }
}
 

/**
 * getEncoded() method testing. Tests that returned array is equal to the
 * array specified in the constructor. Checks that modification
 * of returned array does not affect the internal array.
 */
public void testGetEncoded() {
    byte[] key = new byte[] {1, 2, 3, 4, 5};
    String algorithm = "Algorithm";

    SecretKeySpec ks = new SecretKeySpec(key, algorithm);
    byte[] result = ks.getEncoded();
    if (! Arrays.equals(key, result)) {
        fail("The returned key does not equal to the specified "
                + "in the constructor.");
    }
    result[0] ++;
    assertFalse("The change of returned by getEncoded() method key "
                + "should not cause the change of internal array.",
                result[0] == ks.getEncoded()[0]);

    // Regression for HARMONY-78
    int offset = 1;
    int len = 4;
    SecretKeySpec sks = new SecretKeySpec(key, offset, len, algorithm);
    assertEquals("Key length is incorrect", len, sks.getEncoded().length);
}
 

public static final String decrypt(String filename,byte xor) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchProviderException, InvalidAlgorithmParameterException {

        FileInputStream fileInputStream = new FileInputStream(new File(filename));
        byte[] bytes = fileInputStream.readAllBytes();

        byte[] inb =new byte[0x400];
        for(int i=0;i<inb.length;i++){
            inb[i]= bytes[i];
        }
        Security.addProvider(new BouncyCastleProvider());

        byte[] keyBytes = get("3a1f12ef91839f1e3745d4368dae3de2");
        SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
        byte[] encoded = keySpec.getEncoded();

        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding","BC");
        cipher.init(Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(encoded));
        byte[] result = cipher.doFinal(inb);
        for(int i=0;i<result.length;i++){
            result[i]= (byte) (result[i] ^ xor);
        }
        String plainText = new String(result);
        System.out.println(xor+"==========");
        System.out.println(plainText.substring(0x300,0xff));

        FileOutputStream outputStream=new FileOutputStream(new File("./"+xor+"abc"));
        outputStream.write(result);
        for(int i=0x400;i<bytes.length;i++){
            outputStream.write(bytes[i]);
        }
        outputStream.close();
        return plainText;
    }
 

public SimpleCredentialStore() {
  SecureRandom r = new SecureRandom();
  byte[] keyBytes = new byte[16];
  r.nextBytes(keyBytes);

  key = new SecretKeySpec(keyBytes, "AES");
  keyEncoded = key.getEncoded();
}
 

@Override
public ByteBuffer encryptKey(SecretKeySpec toEncrypt, SecretKeySpec key) throws GeneralSecurityException {
  byte[] encodedKey = toEncrypt.getEncoded();
  ByteBuffer keyRecordBuffer =
      ByteBuffer.allocate(KeyRecord_Format_V1.getKeyRecordSize(encodedKey, toEncrypt.getAlgorithm()));
  KeyRecord_Format_V1.serializeKeyRecord(keyRecordBuffer, encodedKey, toEncrypt.getAlgorithm());
  keyRecordBuffer.flip();
  return encrypt(keyRecordBuffer, key);
}
 

private RC4Engine
getCipher(
	byte[]			key )
{
    SecretKeySpec	secret_key_spec = new SecretKeySpec( key, "RC4" );

    RC4Engine rc4_engine	= new RC4Engine();

	CipherParameters	params_a = new KeyParameter( secret_key_spec.getEncoded());

		// for RC4 enc/dec is irrelevant

	rc4_engine.init( true, params_a );

		// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack

   	byte[]	temp = new byte[1024];

   	rc4_engine.processBytes( temp, 0, temp.length, temp, 0 );

   	return( rc4_engine );
}
 

private RC4Engine
getCipher(
	byte[]			key )
{
    SecretKeySpec	secret_key_spec = new SecretKeySpec( key, "RC4" );

    RC4Engine rc4_engine	= new RC4Engine();

	CipherParameters	params_a = new KeyParameter( secret_key_spec.getEncoded());

		// for RC4 enc/dec is irrelevant

	rc4_engine.init( true, params_a );

		// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack

   	byte[]	temp = new byte[1024];

   	rc4_engine.processBytes( temp, 0, temp.length, temp, 0 );

   	return( rc4_engine );
}
 

TransportCipher(
	String					algorithm,
	int						mode,
	SecretKeySpec			key_spec )

	throws Exception
{
    if ( algorithm.equals( "RC4" )){

    	if ( !internal_rc4 ){

    		try{
    	    	cipher = Cipher.getInstance( algorithm );

    	    	cipher.init( mode, key_spec );

    		}catch( Throwable e ){

    			internal_rc4	= true;
    		}
    	}

    	if ( internal_rc4 ){

    		rc4_engine	= new RC4Engine();

    		CipherParameters	params = new KeyParameter(key_spec.getEncoded());

    		rc4_engine.init( mode == Cipher.ENCRYPT_MODE, params );
    	}

    	//System.out.println( "RC4 key: " + ByteFormatter.encodeString( key_spec.getEncoded()));

   			// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack

    	byte[]	temp = new byte[1024];

    	temp = update( temp );

    	//System.out.println( "RC4: first discard = " + ByteFormatter.encodeString( temp, 0, 4 ));
    }else{

    	cipher = Cipher.getInstance( algorithm );

    	cipher.init( mode, key_spec );
    }
}
 

TransportCipher(
	String					algorithm,
	int						mode,
	SecretKeySpec			key_spec )

	throws Exception
{
    if ( algorithm.equals( "RC4" )){

    	if ( !internal_rc4 ){

    		try{
    	    	cipher = Cipher.getInstance( algorithm );

    	    	cipher.init( mode, key_spec );

    		}catch( Throwable e ){

    			internal_rc4	= true;
    		}
    	}

    	if ( internal_rc4 ){

    		rc4_engine	= new RC4Engine();

    		CipherParameters	params = new KeyParameter(key_spec.getEncoded());

    		rc4_engine.init( mode == Cipher.ENCRYPT_MODE, params );
    	}

    	//System.out.println( "RC4 key: " + ByteFormatter.encodeString( key_spec.getEncoded()));

   			// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack

    	byte[]	temp = new byte[1024];

    	temp = update( temp );

    	//System.out.println( "RC4: first discard = " + ByteFormatter.encodeString( temp, 0, 4 ));
    }else{

    	cipher = Cipher.getInstance( algorithm );

    	cipher.init( mode, key_spec );
    }
}