Java Code Examples for java.util.Base64

@Override
public void paintLayout(Graphics2D g) throws IOException {
    if (imageBase64 == null) {
        int startPoint = src.indexOf(",");
        if (startPoint > -1) {
            imageBase64 = src.substring(startPoint + 1);
        } else {
            imageBase64 = src;
        }
    }
    byte[] bytes = Base64.getDecoder().decode(imageBase64);
    try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes)) {
        BufferedImage image = ImageIO.read(bis);
        Composite oldComp = g.getComposite();
        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, opacity));
        g.drawImage(image.getScaledInstance(width, height, Image.SCALE_SMOOTH), x, y, null);
        g.setComposite(oldComp);
    }
}
 

private static void testWrapEncode2(final Base64.Encoder encoder)
        throws IOException {
    System.err.println("\nEncoder.wrap test II ");
    final byte[] secondTestBuffer =
            "api/java_util/Base64/index.html#GetEncoderMimeCustom[noLineSeparatorInEncodedString]"
            .getBytes(US_ASCII);
    String base64EncodedString;
    ByteArrayOutputStream secondEncodingStream = new ByteArrayOutputStream();
    OutputStream base64EncodingStream = encoder.wrap(secondEncodingStream);
    base64EncodingStream.write(secondTestBuffer);
    base64EncodingStream.close();

    final byte[] encodedByteArray = secondEncodingStream.toByteArray();

    System.err.print("result = " + new String(encodedByteArray, US_ASCII)
            + "  after wrap Base64 encoding of string");

    base64EncodedString = new String(encodedByteArray, US_ASCII);

    if (base64EncodedString.contains("$$$")) {
        throw new RuntimeException(
                "Base64 encoding contains line separator after wrap 2 invoked  ... \n");
    }
}
 

@Test
public void testOTAWrongToken() throws Exception {
    HttpPost post = new HttpPost(httpsAdminServerUrl + "/ota/start?token=" + 123);
    post.setHeader(HttpHeaderNames.AUTHORIZATION.toString(), "Basic " + Base64.getEncoder().encodeToString(auth));

    String fileName = "test.bin";

    InputStream binFile = OTATest.class.getResourceAsStream("/static/ota/" + fileName);
    ContentBody fileBody = new InputStreamBody(binFile, ContentType.APPLICATION_OCTET_STREAM, fileName);

    MultipartEntityBuilder builder = MultipartEntityBuilder.create();
    builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
    builder.addPart("upfile", fileBody);
    HttpEntity entity = builder.build();

    post.setEntity(entity);

    try (CloseableHttpResponse response = httpclient.execute(post)) {
        assertEquals(400, response.getStatusLine().getStatusCode());
        String error = TestUtil.consumeText(response);

        assertNotNull(error);
        assertEquals("Invalid token.", error);
    }
}
 

public static String getUserLogin(HttpServletRequest httpServletRequest) {
    String authorization = httpServletRequest.getHeader("authorization");
    if (null == authorization) {
        // 请求头中没有携带JWT，表示非登录用户
        return null;
    }

    String jwt = authorization.substring(7); // 去除前缀“bearer ”
    String payloadBase64 = jwt.substring(jwt.indexOf(".") + 1, jwt.lastIndexOf(".")); // 取出JWT中第二部分
    Base64.Decoder decoder = Base64.getDecoder();
    String payloadString;
    try {
        payloadString = new String(decoder.decode(payloadBase64), "UTF-8");
    } catch (Exception e) {
        return null;
    }
    JSONObject payloadJson = JSONObject.parseObject(payloadString);

    String userLogin = payloadJson.getString("user_name");
    if (null == userLogin) {
        return "system"; // 如果JWT中没有携带用户名，则应该是微服务见内部调用，此时将用户名强制设为system返回。
    } else {
        return userLogin;
    }
}
 

/**
 * Get the tenant username password mapping from the enabled tenants
 *
 * @return Map<tenantUsername, Password> for all the tenants
 * @throws OnPremiseGatewayException if failed to retrieve the users
 */
public static Map<String, String> getMultiTenantUserMap() throws OnPremiseGatewayException {

    ArrayList multiTenantUsers = ConfigManager.getConfigurationDTO().getMulti_tenant_users();
    if (!multiTenantUsers.isEmpty()) {
        Map<String, String> tenantUserPasswordMap = new HashMap<>();
        for (Object tenantUserCredential : multiTenantUsers) {
            byte[] decodedUser = Base64.getDecoder().decode(tenantUserCredential.toString());
            String decodedUserString = new String(decodedUser);
            String[] userDetails = decodedUserString.split(":");
            tenantUserPasswordMap.put(userDetails[0], userDetails[1]);
        }
        return tenantUserPasswordMap;
    } else {
        throw new OnPremiseGatewayException("Multi Tenant User list is not defined in the on-premise-gateway.toml" +
                " file");
    }
}
 

/**
 * 构造X-WSSE参数值
 *
 * @param appKey
 * @param appSecret
 * @return
 */
static String buildWsseHeader(String appKey, String appSecret) {
    if (null == appKey || null == appSecret || appKey.isEmpty() || appSecret.isEmpty()) {
        System.out.println("buildWsseHeader(): appKey or appSecret is null.");
        return null;
    }
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
    String time = sdf.format(new Date()); //Created
    String nonce = UUID.randomUUID().toString().replace("-", ""); //Nonce

    byte[] passwordDigest = DigestUtils.sha256(nonce + time + appSecret);
    String hexDigest = Hex.encodeHexString(passwordDigest);

    //如果JDK版本是1.8,请加载原生Base64类,并使用如下代码
    String passwordDigestBase64Str = Base64.getEncoder().encodeToString(hexDigest.getBytes()); //PasswordDigest
    //如果JDK版本低于1.8,请加载三方库提供Base64类,并使用如下代码
    //String passwordDigestBase64Str = Base64.encodeBase64String(hexDigest.getBytes(Charset.forName("utf-8"))); //PasswordDigest
    //若passwordDigestBase64Str中包含换行符,请执行如下代码进行修正
    //passwordDigestBase64Str = passwordDigestBase64Str.replaceAll("[\\s*\t\n\r]", "");

    return String.format(WSSE_HEADER_FORMAT, appKey, passwordDigestBase64Str, nonce, time);
}
 

private void sendMsg() {
	String curUsr = getUsrName(usrsListView.getSelectionModel().getSelectedItem());
	if(sendMsg.getText() != null && ! Pattern.matches("\\n*", sendMsg.getText())) {
		out.printf("[SENDTO %s]%s\n", curUsr, Base64.getEncoder().encodeToString(sendMsg.getText().getBytes(StandardCharsets.UTF_8)));
		out.flush();
		String Msg = String.format("[%s <%s>] %s\n",
				new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()),
				usrName, sendMsg.getText()
				);
		if(usrsMsg.get(curUsr) != null)
			usrsMsg.put(curUsr, usrsMsg.get(curUsr) + Msg);
		else
			usrsMsg.put(curUsr, Msg);
		message.appendText(Msg);
		sendMsg.setText("");
	} else {
		sendMsg.setText("");
	}
}
 

/**
 * saving a key and retrieving it from a file should give the same object
 */
@Test
public void saveAndRetrieveSecretKey() throws IOException, ClassNotFoundException {
    SecretKey sK = SensitiveDataCryptoUtils.buildSecretKey(SECRETKEY_LENGTH, configuration.getPbkdf2Algorithm());
    String secretKeyFingerPrint = Base64.getEncoder().encodeToString(sK.getEncoded());

    File keyFile = File.createTempFile("keyfile", "key");
    keyFile.deleteOnExit();

    saveInFile(keyFile, sK);

    ObjectInputStream ois = new ObjectInputStream(new FileInputStream(keyFile));
    SecretKey readKey = (SecretKey) ois.readObject();
    ois.close();

    assertTrue(readKey.getEncoded().length * 8 == SECRETKEY_LENGTH);
    assertTrue(Base64.getEncoder().encodeToString(readKey.getEncoded()).equals(secretKeyFingerPrint));
}
 

public static void waitForCertToChange(String originalCert, String secretName) {
    LOGGER.info("Waiting for Secret {} certificate change", secretName);
    TestUtils.waitFor("Cert to be replaced", Constants.GLOBAL_POLL_INTERVAL, Constants.TIMEOUT_FOR_CLUSTER_STABLE, () -> {
        Secret secret = kubeClient().getSecret(secretName);
        if (secret != null && secret.getData() != null && secret.getData().containsKey("ca.crt")) {
            String currentCert = new String(Base64.getDecoder().decode(secret.getData().get("ca.crt")), StandardCharsets.US_ASCII);
            boolean changed = !originalCert.equals(currentCert);
            if (changed) {
                LOGGER.info("Certificate in Secret {} has changed, was {}, is now {}", secretName, originalCert, currentCert);
            }
            return changed;
        } else {
            return false;
        }
    });
}
 

@Test
public void encrypt3DES() throws Exception {
    assertTrue(
            Arrays.equals(
                    bytesResDES3,
                    EncryptKit.encrypt3DES(bytesDataDES3, bytesKeyDES3)
            )
    );
    assertEquals(
            res3DES,
            EncryptKit.encrypt3DES2HexString(bytesDataDES3, bytesKeyDES3)
    );
    assertTrue(
            Arrays.equals(
                    Base64.getEncoder().encode(bytesResDES3),
                    EncryptKit.encrypt3DES2Base64(bytesDataDES3, bytesKeyDES3)
            )
    );
}
 

/**
 * Convert the given {@link Buffer} into an embedded buffer, by replacing 
 * its URI with a data URI, if the URI is not already a data URI
 * 
 * @param gltfModel The {@link GltfModelV2}
 * @param index The index of the {@link Buffer}
 * @param buffer The {@link Buffer}
 */
private static void convertBufferToEmbedded(
    GltfModelV2 gltfModel, int index, Buffer buffer)
{
    String uriString = buffer.getUri();
    if (IO.isDataUriString(uriString))
    {
        return;
    }
    BufferModel bufferModel = gltfModel.getBufferModels().get(index);
    ByteBuffer bufferData = bufferModel.getBufferData();
    
    byte data[] = new byte[bufferData.capacity()];
    bufferData.slice().get(data);
    String encodedData = Base64.getEncoder().encodeToString(data);
    String dataUriString = 
        "data:application/gltf-buffer;base64," + encodedData;
    
    buffer.setUri(dataUriString);
}
 

@Test(timeout = SolutionSettingsControllerTest.TIMEOUT)
@Category({UnitTest.class})
public void setLogoShouldReturnGivenLogo() throws BaseException, ExecutionException, InterruptedException, UnsupportedEncodingException, URISyntaxException {
    // Arrange
    String image = rand.NextString();
    String type = rand.NextString();
    Logo model = new Logo(image, type, null, false);
    setLogoMockSetup(model);
    controller = new SolutionSettingsController(mockStorage, mockActions);
    Http.Response mockResponse = TestUtils.setRequest(SolutionSettingsControllerTest.LOGO_BODY);

    // Act
    byte[] bytes = TestUtils.getBytes(controller.setLogoAsync().toCompletableFuture().get());
    byte[] bytesold = Base64.getDecoder().decode(model.getImage().getBytes());

    // Assert
    assertEquals(ByteString.fromArray(bytes), ByteString.fromArray(bytesold));
    Mockito.verify(mockResponse).setHeader(Logo.IS_DEFAULT_HEADER, Boolean.toString(false));
}
 

/**
 * Generates a random number using two UUIDs and HMAC-SHA1
 *
 * @return Random Number generated.
 * @throws IdentityException Exception due to Invalid Algorithm or Invalid Key
 */
public static String getRandomNumber() throws IdentityException {
    try {
        String secretKey = UUIDGenerator.generateUUID();
        String baseString = UUIDGenerator.generateUUID();

        SecretKeySpec key = new SecretKeySpec(secretKey.getBytes(), "HmacSHA1");
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(key);
        byte[] rawHmac = mac.doFinal(baseString.getBytes());
        String random = Base64.getEncoder().encodeToString(rawHmac);
        // Registry doesn't have support for these character.
        random = random.replace("/", "_");
        random = random.replace("=", "a");
        random = random.replace("+", "f");
        return random;
    } catch (Exception e) {
        log.error("Error when generating a random number.", e);
        throw IdentityException.error("Error when generating a random number.", e);
    }
}
 

private static void testWrapEncode1(final Base64.Encoder encoder)
        throws IOException {
    System.err.println("\nEncoder.wrap test I ");

    final byte[] bytesIn = "fo".getBytes(US_ASCII);
    String base64EncodedString;
    ByteArrayOutputStream encodingStream = new ByteArrayOutputStream();
    OutputStream encoding = encoder.wrap(encodingStream);
    encoding.write(bytesIn);
    encoding.close();

    final byte[] encodedBytes = encodingStream.toByteArray();

    System.err.print("result = " + new String(encodedBytes, US_ASCII)
            + "  after the Base64 encoding \n");

    base64EncodedString = new String(encodedBytes, US_ASCII);

    if (base64EncodedString.contains("$$$")) {
        throw new RuntimeException(
                "Base64 encoding contains line separator after wrap I test ... \n");
    }
}
 

@Override
public CompletableFuture<Webhook> create() {
    if (name == null) {
        throw new IllegalStateException("Name is no optional parameter!");
    }
    ObjectNode body = JsonNodeFactory.instance.objectNode();
    body.put("name", name);
    if (avatar != null) {
        return avatar.asByteArray(channel.getApi()).thenAccept(bytes -> {
            String base64Avatar = "data:image/" + avatar.getFileType() + ";base64,"
                    + Base64.getEncoder().encodeToString(bytes);
            body.put("avatar", base64Avatar);
        }).thenCompose(aVoid ->
                new RestRequest<Webhook>(channel.getApi(), RestMethod.POST, RestEndpoint.CHANNEL_WEBHOOK)
                        .setUrlParameters(channel.getIdAsString())
                        .setBody(body)
                        .setAuditLogReason(reason)
                        .execute(result -> new WebhookImpl(channel.getApi(), result.getJsonBody())));
    }
    return new RestRequest<Webhook>(channel.getApi(), RestMethod.POST, RestEndpoint.CHANNEL_WEBHOOK)
            .setUrlParameters(channel.getIdAsString())
            .setBody(body)
            .setAuditLogReason(reason)
            .execute(result -> new WebhookImpl(channel.getApi(), result.getJsonBody()));
}
 

@Test
public void testSend() throws Exception {
    assertThat(context.getBean("my-bean", MyBean.class)).isNotNull();

    final ProducerTemplate template = camelContext.createProducerTemplate();
    final MockEndpoint mock = camelContext.getEndpoint("mock:result", MockEndpoint.class);
    final String body = "hello";
    final String expected = Base64.getEncoder().encodeToString("HELLO WORLD!".getBytes(StandardCharsets.US_ASCII));

    mock.expectedMessageCount(1);
    mock.expectedBodiesReceived(expected);

    template.sendBody("direct:start", body);

    mock.assertIsSatisfied();
}
 

@Description("Decode URL safe base64 encoded binary data")
@ScalarFunction("from_base64url")
@SqlType(StandardTypes.VARBINARY)
public static Slice fromBase64UrlVarbinary(@SqlType(StandardTypes.VARBINARY) Slice slice)
{
    try {
        if (slice.hasByteArray()) {
            return Slices.wrappedBuffer(Base64.getUrlDecoder().decode(slice.toByteBuffer()));
        }
        return Slices.wrappedBuffer(Base64.getUrlDecoder().decode(slice.getBytes()));
    }
    catch (IllegalArgumentException e) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, e);
    }
}
 

public static void main(String[] args) throws Exception {
    PKCS10 req = new PKCS10(Base64.getMimeDecoder().decode(csrStr));

    // If PKCS9Attribute did not accept the PrintableString ASN.1 tag,
    // this would fail with an IOException
    Object attr = req.getAttributes().getAttribute("1.2.840.113549.1.9.2");

    // Check that the attribute exists
    if (attr == null) {
        throw new Exception("Attribute should not be null.");
    }

    System.out.println("Test passed.");
}
 

protected String generateAcceptKey(String key ){
    StringBuilder builder = new StringBuilder( key );
    builder.append(SALT);
    try {
        return Base64.getEncoder().encodeToString( MessageDigest.getInstance(
                "SHA").digest(builder.toString().getBytes(  // NOI18N
                        Charset.forName(Utils.UTF_8))));
    }
    catch (NoSuchAlgorithmException e) {
        WebSocketServerImpl.LOG.log(Level.WARNING, null , e);
        return null;
    }
}
 

@Test
public void test() throws DecoderException {
  Base64Binary binary = new Base64Binary(null);
  assertNull(binary.getData());
  assertNull(binary.stringValue());
  assertEquals("{}", binary.toString());
  assertEquals(0, binary.hashCode());
  assertFalse(binary.equals(null));
  assertFalse(binary.equals(new Object()));
  assertTrue(binary.equals(binary));
  String data = "I am base 64";
  String r = Base64.getEncoder().encodeToString(data.getBytes());
  binary = Base64Binary.newInstance(r);
  assertNotEquals("{}", binary.toString());
  assertNotNull(binary.toString());
  assertNull(Base64Binary.newInstance(null));
  assertEquals(r, binary.stringValue());
  Base64Binary binary2 = new Base64Binary(binary.getData());
  assertEquals(binary, binary2);
  binary = new Base64Binary(null);
  binary2 = new Base64Binary(null);
  assertEquals(binary, binary2);
  binary2 = Base64Binary.newInstance(r);
  assertNotEquals(binary, binary2);
  assertNotEquals(binary2, binary);
  binary = Base64Binary.newInstance(r);
  assertTrue(binary.hashCode() != 0);
}
 

/**
 * Checks decoding of bytes containing a value outside of the allowed
 * {@link #TABLE_1 "basic" alphabet}.
 */
public void testDecoder_extraChars_basic() throws Exception {
    Decoder basicDecoder = Base64.getDecoder(); // uses Table 1
    // Check failure cases common to both RFC4648 Table 1 and Table 2 decoding.
    checkDecoder_extraChars_common(basicDecoder);

    // Tests characters that are part of RFC4848 Table 2 but not Table 1.
    assertDecodeThrowsIAe(basicDecoder, "_aGVsbG8sIHdvcmx");
    assertDecodeThrowsIAe(basicDecoder, "aGV_sbG8sIHdvcmx");
    assertDecodeThrowsIAe(basicDecoder, "aGVsbG8sIHdvcmx_");
}
 

private byte[] getSecurityData() {
    String s = getLastResponseString();
    if (s.substring(4, 9).equalsIgnoreCase("ADAT=")) {
        // Need to get rid of the leading '315 ADAT='
        // and the trailing newline
        return Base64.getMimeDecoder().decode(s.substring(9, s.length() - 1));
    }
    return null;
}
 

public static String encrypt(String password) throws Exception {
    final Key key = getKey();

    final Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    cipher.init(Cipher.ENCRYPT_MODE, key);

    final byte[] input = password.getBytes();
    final byte[] encrypted = cipher.doFinal(input);

    return Base64.getEncoder().encodeToString(encrypted);
}
 

/**
 * Serializes a given {@link TypeToken} into a {@link String}
 * representation.
 *
 * @param typeToken
 *            The {@link TypeToken} to serialize.
 * @return The string representation of the {@link TypeToken} encoded in
 *         Base64.
 */
public static final String serialize(TypeToken<?> typeToken) {
	try {
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		ObjectOutputStream os = new ObjectOutputStream(bos);
		os.writeObject(typeToken);
		os.close();
		return Base64.getEncoder().encodeToString(bos.toByteArray());
	} catch (IOException e) {
		throw new IllegalArgumentException(
				"Could not serialize " + typeToken);
	}
}
 

/**
 * RSA publickey相关操作
 *
 * @param request
 * @param response
 * @param pubKey
 */
private void handleTenant(HttpServletRequest request,
                          HttpServletResponse response,
                          String pubKey) {
    if (RSA_KEY.equals(pubKey)) {
        if(base64PublicKey==null) {
            //publicCode base64 编码
            //由于配置文件中的RSA 密钥是Hex 编码，需要转换
            if (StringUtils.isNotBlank(systemConfig.getPublicCode())) {
                base64PublicKey= Base64.getEncoder().encodeToString(Hex.decode(systemConfig.getPublicCode()));
            }
        }
        response.setHeader(HEADER_PUBKEY, base64PublicKey);
    }
}
 

public String getImageBase64() {
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ImageIO.write(image, "png", bos);
        return imageHeader + Base64.getEncoder().encodeToString(bos.toByteArray());
    } catch (Exception e) {
        log.error("encode imageBase64 failed", e);
    }
    return null;
}
 

default BValue encodeBase64() {
    if (!(this.getData() instanceof byte[])) {
        throw new InvalidTypeException("Cannot encode base64 from data which is not in raw (byte[]) format");
    }
    this.setData(Base64.getEncoder().encodeToString(getRaw()));
    return this;
}
 

public String createToken(JSONObject payload) throws Exception {
    JSONObject header = new JSONObject();
    header.put("alg", "HS256");
    header.put("typ", "JWT");

    Encoder enc = Base64.getUrlEncoder();

    String encHeader = enc.encodeToString(header.toString().getBytes("UTF-8")).replace("=", "");
    String encPayload = enc.encodeToString(payload.toString().getBytes("UTF-8")).replace("=", "");
    String hash = calculateHash(encHeader, encPayload);

    return encHeader + "." + encPayload + "." + hash;
}
 

@Test
public void validTransactionHashReturnedAfterDistribute() {
  final String enclavePublicKey = "93Ky7lXwFkMc7+ckoFgUMku5bpr9tz4zhmWmk9RlNng=";
  when(privacyController.sendTransaction(any(PrivateTransaction.class), any(), any()))
      .thenReturn(enclavePublicKey);
  when(privacyController.validatePrivateTransaction(any(PrivateTransaction.class), anyString()))
      .thenReturn(ValidationResult.valid());

  final JsonRpcRequestContext request =
      new JsonRpcRequestContext(
          new JsonRpcRequest(
              "2.0",
              "priv_distributeRawTransaction",
              new String[] {VALID_PRIVATE_TRANSACTION_RLP_PRIVACY_GROUP}),
          user);

  final JsonRpcResponse expectedResponse =
      new JsonRpcSuccessResponse(
          request.getRequest().getId(),
          Bytes.wrap(Base64.getDecoder().decode(enclavePublicKey)).toString());

  final JsonRpcResponse actualResponse = method.response(request);

  assertThat(actualResponse).isEqualToComparingFieldByField(expectedResponse);
  verify(privacyController)
      .sendTransaction(any(PrivateTransaction.class), eq(ENCLAVE_PUBLIC_KEY), any());
  verify(privacyController)
      .validatePrivateTransaction(any(PrivateTransaction.class), eq(ENCLAVE_PUBLIC_KEY));
}
 

public String decrypt(String value) throws EncryptionException {
  try {
    byte[] dec = Base64.getDecoder().decode(value.getBytes());
    byte[] utf8 = dcipher.doFinal(dec);
    return new String(utf8, "UTF8");
  } catch (UnsupportedEncodingException | BadPaddingException | IllegalBlockSizeException e) {
    throw new EncryptionException("Could not decrypt string", e);
  }
}