Java Code Examples for com.google.common.io.BaseEncoding#base64()

The following examples show how to use com.google.common.io.BaseEncoding#base64() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: FirebaseChannel.java From java-docs-samples with Apache License 2.0

6 votes

/** Create a secure JWT token for the given userId. */
public String createFirebaseToken(Game game, String userId) {
  final AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();
  final BaseEncoding base64 = BaseEncoding.base64();

  String header = base64.encode("{\"typ\":\"JWT\",\"alg\":\"RS256\"}".getBytes());

  // Construct the claim
  String channelKey = game.getChannelKey(userId);
  String clientEmail = appIdentity.getServiceAccountName();
  long epochTime = System.currentTimeMillis() / 1000;
  long expire = epochTime + 60 * 60; // an hour from now

  Map<String, Object> claims = new HashMap<String, Object>();
  claims.put("iss", clientEmail);
  claims.put("sub", clientEmail);
  claims.put("aud", IDENTITY_ENDPOINT);
  claims.put("uid", channelKey);
  claims.put("iat", epochTime);
  claims.put("exp", expire);

  String payload = base64.encode(new Gson().toJson(claims).getBytes());
  String toSign = String.format("%s.%s", header, payload);
  AppIdentityService.SigningResult result = appIdentity.signForApp(toSign.getBytes());
  return String.format("%s.%s", toSign, base64.encode(result.getSignature()));
}

Example 2

Source File: SubmitTransactionResponse.java From java-stellar-sdk with Apache License 2.0

6 votes

/**
 * Decoding "TransactionResult" from "resultXdr".
 * This will be <code>Optional.absent()</code> if transaction has failed.
 */
public Optional<TransactionResult> getDecodedTransactionResult() throws IOException {
    if(!this.isSuccess()) {
        return Optional.absent();
    }

    if (this.transactionResult == null) {
        Optional<String> resultXDR = this.getResultXdr();
        if (!resultXDR.isPresent()) {
            return Optional.absent();
        }
        BaseEncoding base64Encoding = BaseEncoding.base64();
        byte[] bytes = base64Encoding.decode(resultXDR.get());
        ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
        XdrDataInputStream xdrInputStream = new XdrDataInputStream(inputStream);
        this.transactionResult = TransactionResult.decode(xdrInputStream);
    }

    return Optional.of(this.transactionResult);
}

Example 3

Source File: Operation.java From java-stellar-sdk with Apache License 2.0

5 votes

/**
 * Returns base64-encoded Operation XDR object.
 */
public String toXdrBase64() {
  try {
    org.stellar.sdk.xdr.Operation operation = this.toXdr();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    XdrDataOutputStream xdrOutputStream = new XdrDataOutputStream(outputStream);
    org.stellar.sdk.xdr.Operation.encode(xdrOutputStream, operation);
    BaseEncoding base64Encoding = BaseEncoding.base64();
    return base64Encoding.encode(outputStream.toByteArray());
  } catch (IOException e) {
    throw new AssertionError(e);
  }
}

Example 4

Source File: AbstractTransaction.java From java-stellar-sdk with Apache License 2.0

5 votes

/**
 * Returns base64-encoded TransactionEnvelope XDR object. Transaction need to have at least one signature.
 */
public String toEnvelopeXdrBase64() {
  try {
    TransactionEnvelope envelope = this.toEnvelopeXdr();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    XdrDataOutputStream xdrOutputStream = new XdrDataOutputStream(outputStream);
    TransactionEnvelope.encode(xdrOutputStream, envelope);

    BaseEncoding base64Encoding = BaseEncoding.base64();
    return base64Encoding.encode(outputStream.toByteArray());
  } catch (IOException e) {
    throw new AssertionError(e);
  }
}

Example 5

Source File: AbstractTransaction.java From java-stellar-sdk with Apache License 2.0

5 votes

/**
 * Creates a <code>Transaction</code> instance from previously build <code>TransactionEnvelope</code>
 * @param envelope Base-64 encoded <code>TransactionEnvelope</code>
 * @return
 * @throws IOException
 */
public static AbstractTransaction fromEnvelopeXdr(String envelope, Network network) throws IOException {
  BaseEncoding base64Encoding = BaseEncoding.base64();
  byte[] bytes = base64Encoding.decode(envelope);

  TransactionEnvelope transactionEnvelope = TransactionEnvelope.decode(new XdrDataInputStream(new ByteArrayInputStream(bytes)));
  return fromEnvelopeXdr(transactionEnvelope, network);
}

Example 6

Source File: Sep10Challenge.java From java-stellar-sdk with Apache License 2.0

5 votes

/**
 * Returns a valid <a href="https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0010.md#response" target="_blank">SEP 10</a> challenge, for use in web authentication.
 * @param signer           The server's signing account.
 * @param network          The Stellar network used by the server.
 * @param clientAccountId  The stellar account belonging to the client.
 * @param anchorName       The name of the anchor which will be included in the ManageData operation.
 * @param timebounds       The lifetime of the challenge token.
 */
public static Transaction newChallenge(
    KeyPair signer,
    Network network,
    String clientAccountId,
    String anchorName,
    TimeBounds timebounds
) throws InvalidSep10ChallengeException {
  byte[] nonce = new byte[48];
  SecureRandom random = new SecureRandom();
  random.nextBytes(nonce);
  BaseEncoding base64Encoding = BaseEncoding.base64();
  byte[] encodedNonce = base64Encoding.encode(nonce).getBytes();


  if (StrKey.decodeVersionByte(clientAccountId) != StrKey.VersionByte.ACCOUNT_ID) {
    throw new InvalidSep10ChallengeException(clientAccountId+" is not a valid account id");
  }

  Account sourceAccount = new Account(signer.getAccountId(), -1L);
  ManageDataOperation operation = new ManageDataOperation.Builder(anchorName + " auth", encodedNonce)
      .setSourceAccount(clientAccountId)
      .build();
  Transaction transaction = new Transaction.Builder(sourceAccount, network)
      .addTimeBounds(timebounds)
      .setBaseFee(100)
      .addOperation(operation)
      .build();

  transaction.sign(signer);

  return transaction;
}

Example 7

Source File: Sep10ChallengeTest.java From java-stellar-sdk with Apache License 2.0

5 votes

@Test
public void testChallenge() throws InvalidSep10ChallengeException {
  KeyPair server = KeyPair.random();
  KeyPair client = KeyPair.random();

  long now = System.currentTimeMillis() / 1000L;
  long end = now + 300;
  TimeBounds timeBounds = new TimeBounds(now, end);

  Transaction transaction = Sep10Challenge.newChallenge(
      server,
      Network.TESTNET,
      client.getAccountId(),
      "angkor wat",
      timeBounds
  );


  assertEquals(Network.TESTNET, transaction.getNetwork());
  assertEquals(100, transaction.getFee());
  assertEquals(timeBounds, transaction.getTimeBounds());
  assertEquals(server.getAccountId(), transaction.getSourceAccount());
  assertEquals(0, transaction.getSequenceNumber());

  assertEquals(1, transaction.getOperations().length);
  ManageDataOperation op = (ManageDataOperation) transaction.getOperations()[0];
  assertEquals(client.getAccountId(), op.getSourceAccount());
  assertEquals("angkor wat auth", op.getName());

  assertEquals(64, op.getValue().length);
  BaseEncoding base64Encoding = BaseEncoding.base64();
  assertTrue(base64Encoding.canDecode(new String(op.getValue())));

  assertEquals(1, transaction.getSignatures().size());
  assertTrue(
      server.verify(transaction.hash(), transaction.getSignatures().get(0).getSignature().getSignature())
  );
}

Example 8