Example usage for java.nio ByteBuffer array

List of usage examples for java.nio ByteBuffer array

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Introduction

In this page you can find the example usage for java.nio ByteBuffer array.

Prototype

public final byte[] array()

Source Link

Document

Returns the byte array which this buffer is based on, if there is one.

Usage

From source file:Main.java

static byte[] decryptJWE(String jwe, Key privRsaKey) {
    // Log.d("","decryptJWE");

    try {/*from  w  w  w.  j  av a  2 s .c  o m*/
        // split jwe string
        StringTokenizer tokens = new StringTokenizer(jwe, ".");
        int count = tokens.countTokens();
        // Log.d("","parts.length: "+count);

        if (count != 5)
            return null;

        String jweProtectedHeader64 = tokens.nextToken();
        String jweEncrypted64 = tokens.nextToken();
        String jweInitVector64 = tokens.nextToken();
        String cryptedBytes64 = tokens.nextToken();
        String auth_tag64 = tokens.nextToken();

        // decrypt cek using private rsa key
        byte[] cek = decryptRsaB64(jweEncrypted64, privRsaKey);

        // check cek result byte array
        if (cek == null || cek.length == 0 || (cek.length % 2) != 0)
            return null;

        int keySize = cek.length / 2;
        Log.d("", "Decryption AES: " + keySize * 8);

        // build aes_key and hmac_key
        byte aes_key[] = new byte[keySize];
        byte hmac_key[] = new byte[keySize];

        System.arraycopy(cek, 0, hmac_key, 0, keySize);
        System.arraycopy(cek, keySize, aes_key, 0, keySize);

        // decode initialization vector
        byte[] iv_key = decodeB64(jweInitVector64);

        Log.d("", "hmac_key: " + bytesToHex(hmac_key));
        Log.d("", "aes_key:  " + bytesToHex(aes_key));
        Log.d("", "iv_key:   " + bytesToHex(iv_key));

        // decrypt content using aes_key and iv_key
        byte[] cryptedBytes = decodeB64(cryptedBytes64);
        Cipher decrypt = Cipher.getInstance("AES/CBC/PKCS5Padding", "SC");
        decrypt.init(Cipher.DECRYPT_MODE, new SecretKeySpec(aes_key, "AES"), new IvParameterSpec(iv_key));
        byte[] decryptedBytes = decrypt.doFinal(cryptedBytes);

        Log.d("", "decryptedBytes:");
        Log.d("", bytesToHex(decryptedBytes));

        // validation verification
        byte[] aad = jweProtectedHeader64.getBytes();
        long al = aad.length * 8;

        // concatenate aad, iv_key, cryptedBytes and al 
        byte[] hmacData = new byte[aad.length + iv_key.length + cryptedBytes.length + 8];
        int offset = 0;
        System.arraycopy(aad, offset, hmacData, 0, aad.length);
        offset += aad.length;
        System.arraycopy(iv_key, 0, hmacData, offset, iv_key.length);
        offset += iv_key.length;
        System.arraycopy(cryptedBytes, 0, hmacData, offset, cryptedBytes.length);
        offset += cryptedBytes.length;
        ByteBuffer buffer = ByteBuffer.allocate(8);
        buffer.putLong(al);
        System.arraycopy(buffer.array(), 0, hmacData, offset, 8);

        // compute hmac
        Mac hmac = Mac.getInstance("HmacSHA256", "SC");
        hmac.init(new SecretKeySpec(hmac_key, "HmacSHA256"));
        byte[] hmacValue = hmac.doFinal(hmacData);

        // pick authentication tag
        byte[] authTag = Arrays.copyOf(hmacValue, 16);

        // validate authentication tag
        byte[] authTagRead = decodeB64(auth_tag64);
        for (int i = 0; i < 16; i++) {
            if (authTag[i] != authTagRead[i]) {
                Log.d("", "validation failed");
                return decryptedBytes;
            }
        }

        Log.d("", "validation success");

        // validation success
        return decryptedBytes;

    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;
}

From source file:com.pushtechnology.diffusion.examples.runnable.RandomData.java

/**
 * Serialize a {@link RandomData} value as a {@link Binary} value.
 * @param randomData The {@link RandomData} value
 * @return The {@link Binary} value/*  w ww  .  ja v a  2  s .  c o  m*/
 */
static Binary toBinary(RandomData randomData) {
    final ByteBuffer buffer = ByteBuffer.allocate(16);
    buffer.putInt(randomData.getId());
    buffer.putLong(randomData.getTimestamp());
    buffer.putInt(randomData.getRandomInt());
    return Diffusion.dataTypes().binary().readValue(buffer.array());
}

From source file:org.brekka.phalanx.core.services.impl.AbstractCryptoService.java

private static byte[] encodeSecretKey(InternalSecretKeyToken iskt) {
    int profileId = iskt.getSymedCryptoData().getProfile();
    byte[] keyId = toBytes(iskt.getSymedCryptoData().getId());
    byte[] data = iskt.getSecretKey().getEncoded();
    ByteBuffer buffer = ByteBuffer.allocate(SK_MAGIC_MARKER.length + 20 + data.length).put(SK_MAGIC_MARKER)
            .putInt(profileId).put(keyId).put(data);
    return buffer.array();
}

From source file:com.all.shared.util.SyncUtils.java

public static String encodeAndZip(List<SyncEventEntity> events) {
    String json = JsonConverter.toJson(events);
    byte[] encodedBytes = null;
    try {/*from   ww  w.  j av  a2s  .  com*/
        ByteBuffer byteBuffer = UTF_ENCODER.encode(CharBuffer.wrap(json));
        encodedBytes = byteBuffer.array();
    } catch (CharacterCodingException e) {
        LOGGER.warn("Could not encode message with UTF-8.");
        encodedBytes = json.getBytes();
    }
    return new String(Base64.encode(zip(encodedBytes)));
}

From source file:Main.java

public static final boolean isPredessorEquals(final ByteBuffer bb1, final int offset1, final int l1,
        final ByteBuffer bb2, final int offset2, final int l2) {
    // return v1.compareToIgnoreCase(v2) <= 0;
    if (l1 <= 0) {
        return false;
    } else if (l2 <= 0) {
        return true;
    }/*  w  w w  .  j a v a2s  . c  o m*/
    return compareTo(bb1.array(), offset1, l1, bb2.array(), offset2, l2) <= 0;
}

From source file:io.alicorn.server.http.LoginEndpoint.java

public static String hash(char[] chars) {
    //Parse chars into bytes for hashing.
    CharBuffer charBuffer = CharBuffer.wrap(chars);
    ByteBuffer byteBuffer = charset.encode(charBuffer);
    byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());

    //Clear temporary arrays of any data.
    Arrays.fill(charBuffer.array(), '\u0000');
    Arrays.fill(byteBuffer.array(), (byte) 0);

    //Generate the SHA-256 hash.
    String hash = hash(bytes);/*from w w w .  j  a  va2s .com*/

    //Clear remaining arrays of any data.
    Arrays.fill(bytes, (byte) 0);

    return hash;
}

From source file:gobblin.util.io.StreamUtils.java

/**
 * Reads the full contents of a ByteBuffer and writes them to an OutputStream. The ByteBuffer is
 * consumed by this operation; eg in.remaining() will be 0 after it completes successfully.
 * @param in  ByteBuffer to write into the OutputStream
 * @param out Destination stream/*from  w ww .  j  a  v  a 2 s.c om*/
 * @throws IOException If there is an error writing into the OutputStream
 */
public static void byteBufferToOutputStream(ByteBuffer in, OutputStream out) throws IOException {
    final int BUF_SIZE = 8192;

    if (in.hasArray()) {
        out.write(in.array(), in.arrayOffset() + in.position(), in.remaining());
    } else {
        final byte[] b = new byte[Math.min(in.remaining(), BUF_SIZE)];
        while (in.remaining() > 0) {
            int bytesToRead = Math.min(in.remaining(), BUF_SIZE);
            in.get(b, 0, bytesToRead);

            out.write(b, 0, bytesToRead);
        }
    }
}

From source file:biz.karms.sinkit.ejb.util.CIDRUtils.java

public static ImmutablePair<String, String> getStartEndAddresses(final String cidr)
        throws UnknownHostException {
    //TODO: This is silly. Refactor CIDRUtils so as to accept actual IPs as well as subnets.
    //TODO: Validate the thing before processing. Guava?
    final String fixedCIDR;
    if (!cidr.contains("/")) {
        //IPv6? Hmmm...
        if (cidr.contains(":")) {
            fixedCIDR = cidr + "/128";
        } else {//  www  . j  a  v a 2  s  .c  o  m
            fixedCIDR = cidr + "/32";
        }
    } else {
        fixedCIDR = cidr;
    }
    final int index = fixedCIDR.indexOf("/");
    final InetAddress inetAddress = InetAddress.getByName(fixedCIDR.substring(0, index));
    final int prefixLength = Integer.parseInt(fixedCIDR.substring(index + 1));

    final ByteBuffer maskBuffer;
    if (inetAddress.getAddress().length == 4) {
        maskBuffer = ByteBuffer.allocate(4).putInt(-1);
    } else {
        maskBuffer = ByteBuffer.allocate(16).putLong(-1L).putLong(-1L);
    }

    final BigInteger mask = (new BigInteger(1, maskBuffer.array())).not().shiftRight(prefixLength);
    final ByteBuffer buffer = ByteBuffer.wrap(inetAddress.getAddress());
    final BigInteger ipVal = new BigInteger(1, buffer.array());
    final BigInteger startIp = ipVal.and(mask);
    final BigInteger endIp = startIp.add(mask.not());

    return new ImmutablePair<>(String.format("%040d", startIp), String.format("%040d", endIp));
}

From source file:com.amazonaws.services.sqs.MessageMD5ChecksumHandler.java

/**
 * Update the digest using a sequence of bytes that consists of the length
 * (in 4 bytes) of the input ByteBuffer and all the bytes it contains.
 *///from w w  w.  java 2  s.c  o m
private static void updateLengthAndBytes(MessageDigest digest, ByteBuffer binaryValue) {
    // Rewind the ByteBuffer, in case that get/put operations were applied to
    // the unmarshalled BB before it's passed to this handler.
    binaryValue.rewind();
    int size = binaryValue.remaining();
    ByteBuffer lengthBytes = ByteBuffer.allocate(INTEGER_SIZE_IN_BYTES).putInt(size);
    digest.update(lengthBytes.array());
    digest.update(binaryValue);
}

From source file:android.wulongdao.thirdparty.mime.HttpMultipart.java

private static ByteArrayBuffer encode(final Charset charset, final String string) {
    ByteBuffer encoded = charset.encode(CharBuffer.wrap(string));
    ByteArrayBuffer bab = new ByteArrayBuffer(encoded.remaining());
    bab.append(encoded.array(), encoded.position(), encoded.remaining());
    return bab;/*  ww  w  .  j  a va  2  s  .c o m*/
}