Example usage for java.util.zip CRC32 CRC32

Introduction

In this page you can find the example usage for java.util.zip CRC32 CRC32.

Prototype

public CRC32() 

Source Link

Document

Creates a new CRC32 object.

Usage

From source file:com.magestore.app.pos.api.m1.config.POSConfigDataAccessM1.java

@Override
public boolean checkLicenseKey()
        throws DataAccessException, ConnectionException, ParseException, IOException, ParseException {
    // nu cha load config, cn khi to ch  default
    if (mConfig == null)
        mConfig = new PosConfigDefault();
    ActiveKey activeKey = new PosActiveKey();
    if (mConfig.getValue("webpos/general/active_key") == null)
        return false;

    String baseUrl = getHostUrl(POSDataAccessSessionM1.REST_BASE_URL);
    String extensionName = POSDataAccessSessionM1.REST_EXTENSION_NAME;
    String licensekey = (String) mConfig.getValue("webpos/general/active_key");
    if (licensekey.length() < 68)
        return false;
    CRC32 crc = new CRC32();
    String strExtensionName = licensekey.substring(0, 10) + extensionName;
    crc.update(strExtensionName.getBytes());
    int strDataCrc32 = (int) crc.getValue();
    int crc32Pos = (strDataCrc32 & 0x7FFFFFFF % 51) + 10;
    int md5Length = 32;
    String md5String = licensekey.substring(crc32Pos, (crc32Pos + md5Length));
    int md5StringLength = md5String.length();
    String key = licensekey.substring(0, crc32Pos)
            + licensekey.substring((crc32Pos + md5StringLength + 3), licensekey.length());
    try {/*from   w  ww .  j  av a  2  s  .  c  om*/
        while ((key.length() % 4) != 0) {
            key += "=";
        }
        String licenseString = decryptRSAToString(key, POSDataAccessSessionM1.REST_PUBLIC_KEY);
        if (StringUtil.isNullOrEmpty(licenseString))
            return false;

        String strlicenseString = licenseString.substring(0, 3);
        String strlicensekey = licensekey.substring((crc32Pos + md5StringLength),
                (crc32Pos + md5StringLength + 3));
        if (!strlicenseString.equals(strlicensekey))
            return false;

        String type = licenseString.substring(0, 1);
        String strexpiredTime = licenseString.substring(1, 3);
        int expiredTime = Integer.parseInt(String.valueOf(strexpiredTime), 16);
        long extensionHash = -1;
        try {
            extensionHash = Long.parseLong(licenseString.substring(3, 13));
        } catch (Exception e) {
        }
        CRC32 crcExtensionName = new CRC32();
        crcExtensionName.update(extensionName.getBytes());
        long crc32ExtensionName = crcExtensionName.getValue();
        if (extensionHash != crc32ExtensionName)
            return false;

        String licenseDomain = licenseString.substring(17, licenseString.length()).replaceAll(" ", "");
        String checkCRc32 = licensekey.substring(0, crc32Pos)
                + licensekey.substring((crc32Pos + md5StringLength),
                        (crc32Pos + md5StringLength) + (licensekey.length() - crc32Pos - md5StringLength))
                + extensionName + licenseDomain;
        //            CRC32 crcCheck = new CRC32();
        //            crcCheck.update(checkCRc32.getBytes());
        //            long lcrc32String = -1;
        //            try {
        //                lcrc32String = Long.parseLong(crc32String);
        //            } catch (Exception e) {
        //            }
        String md5Check = EncryptUntil.HashMD5(checkCRc32);
        if (!md5Check.equals(md5String))
            return false;

        String strDate = licenseString.substring(11, 15);
        int resultDate = Integer.parseInt(String.valueOf(strDate), 16);
        String DATE_FORMAT = "yyyy-MM-dd";
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
        String createdDate = sdf.format(new Date(resultDate * 24 * 3600 * 1000L));
        if (!checkSameDomain(baseUrl, licenseDomain))
            return false;

        activeKey.setType(type);
        activeKey.setExpiredTime(expiredTime);
        activeKey.setCreatedDate(createdDate);
        activeKey.setLicenseDomain(licenseDomain);
        ConfigUtil.setActiveKey(activeKey);
        ConfigUtil.setIsDevLicense(type.equals("D") ? true : false);
        return true;
    } catch (Exception e) {
        String licenseDomain = "";
        if (baseUrl.contains("https://")) {
            baseUrl = baseUrl.replace("https://", "");
        } else if (baseUrl.contains("http://")) {
            baseUrl = baseUrl.replace("http://", "");
        }
        if (baseUrl.length() > 36) {
            licenseDomain = baseUrl.substring(0, 36);
        } else {
            licenseDomain = baseUrl;
        }
        String checkCRc32 = licensekey.substring(0, crc32Pos)
                + licensekey.substring((crc32Pos + md5StringLength),
                        (crc32Pos + md5StringLength) + (licensekey.length() - crc32Pos - md5StringLength))
                + extensionName + licenseDomain;
        //            CRC32 crcCheck = new CRC32();
        //            crcCheck.update(checkCRc32.getBytes());
        //            long lcrc32String = -1;
        //            try {
        //                lcrc32String = Long.parseLong(crc32String);
        //            } catch (Exception ex) {
        //            }
        String md5Check = EncryptUntil.HashMD5(checkCRc32);
        if (!md5Check.equals(md5String))
            return false;
        String type = licensekey.substring(crc32Pos + md5StringLength, crc32Pos + md5StringLength + 1);
        String strexpiredTime = licensekey.substring(crc32Pos + md5StringLength + 1,
                crc32Pos + md5StringLength + 1 + 2);
        int expiredTime = Integer.parseInt(String.valueOf(strexpiredTime), 16);
        if (!checkSameDomain(baseUrl, licenseDomain))
            return false;
        activeKey.setType(type);
        activeKey.setExpiredTime(expiredTime);
        activeKey.setLicenseDomain(licenseDomain);
        ConfigUtil.setActiveKey(activeKey);
        ConfigUtil.setIsDevLicense(type.equals("D") ? true : false);
        return true;
    }
}

---

From source file:srebrinb.compress.sevenzip.SevenZOutputFile.java

/**
 * Finishes the addition of entries to this archive, without closing it.
 * /* ww w  . jav a 2s  . c om*/
 * @throws IOException if archive is already closed.
 */
public void finish() throws IOException {
    if (finished) {
        throw new IOException("This archive has already been finished");
    }
    finished = true;

    final long headerPosition = channel.position();

    final ByteArrayOutputStream headerBaos = new ByteArrayOutputStream();
    final DataOutputStream header = new DataOutputStream(headerBaos);

    writeHeader(header);
    header.flush();
    final byte[] headerBytes = headerBaos.toByteArray();
    channel.write(ByteBuffer.wrap(headerBytes));

    final CRC32 crc32 = new CRC32();
    crc32.update(headerBytes);

    ByteBuffer bb = ByteBuffer.allocate(SevenZFile.sevenZSignature.length + 2 /* version */
            + 4 /* start header CRC */
            + 8 /* next header position */
            + 8 /* next header length */
            + 4 /* next header CRC */).order(ByteOrder.LITTLE_ENDIAN);
    // signature header
    channel.position(0);
    bb.put(SevenZFile.sevenZSignature);
    // version
    bb.put((byte) 0).put((byte) 2);

    // placeholder for start header CRC
    bb.putInt(0);

    // start header
    bb.putLong(headerPosition - SevenZFile.SIGNATURE_HEADER_SIZE).putLong(0xffffFFFFL & headerBytes.length)
            .putInt((int) crc32.getValue());
    crc32.reset();
    crc32.update(bb.array(), SevenZFile.sevenZSignature.length + 6, 20);
    bb.putInt(SevenZFile.sevenZSignature.length + 2, (int) crc32.getValue());
    bb.flip();
    channel.write(bb);
}

---

From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes/*from w ww .  j a v  a2  s .c o  m*/
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.CRC32} object.
 */
public static long getCheckSumCRC32(byte[] bytes) {
    Checksum checksum = new CRC32();
    checksum.update(bytes, 0, bytes.length);
    long cs = checksum.getValue();
    return cs;
}

---

From source file:com.magestore.app.pos.api.m2.config.POSConfigDataAccess.java

@Override
public boolean checkLicenseKey()
        throws DataAccessException, ConnectionException, ParseException, IOException, ParseException {
    // nu cha load config, cn khi to ch  default
    if (mConfig == null)
        mConfig = new PosConfigDefault();
    ActiveKey activeKey = new PosActiveKey();
    if (mConfig.getValue("webpos/general/active_key") == null)
        return false;

    String baseUrl = getHostUrl(POSDataAccessSession.REST_BASE_URL);
    String extensionName = POSDataAccessSession.REST_EXTENSION_NAME;
    String licensekey = (String) mConfig.getValue("webpos/general/active_key");
    if (licensekey.length() < 68)
        return false;
    CRC32 crc = new CRC32();
    String strExtensionName = licensekey.substring(0, 10) + extensionName;
    crc.update(strExtensionName.getBytes());
    int strDataCrc32 = (int) crc.getValue();
    int crc32Pos = (strDataCrc32 & 0x7FFFFFFF % 51) + 10;
    int md5Length = 32;
    String md5String = licensekey.substring(crc32Pos, (crc32Pos + md5Length));
    int md5StringLength = md5String.length();
    String key = licensekey.substring(0, crc32Pos)
            + licensekey.substring((crc32Pos + md5StringLength + 3), licensekey.length());
    try {//from w  w w .ja v  a 2  s .  c om
        while ((key.length() % 4) != 0) {
            key += "=";
        }
        String licenseString = decryptRSAToString(key, POSDataAccessSession.REST_PUBLIC_KEY);
        if (StringUtil.isNullOrEmpty(licenseString))
            return false;

        String strlicenseString = licenseString.substring(0, 3);
        String strlicensekey = licensekey.substring((crc32Pos + md5StringLength),
                (crc32Pos + md5StringLength + 3));
        if (!strlicenseString.equals(strlicensekey))
            return false;

        String type = licenseString.substring(0, 1);
        String strexpiredTime = licenseString.substring(1, 3);
        int expiredTime = Integer.parseInt(String.valueOf(strexpiredTime), 16);
        long extensionHash = -1;
        try {
            extensionHash = Long.parseLong(licenseString.substring(3, 13));
        } catch (Exception e) {
        }
        CRC32 crcExtensionName = new CRC32();
        crcExtensionName.update(extensionName.getBytes());
        long crc32ExtensionName = crcExtensionName.getValue();
        if (extensionHash != crc32ExtensionName)
            return false;

        String licenseDomain = licenseString.substring(17, licenseString.length()).replaceAll(" ", "");
        String checkCRc32 = licensekey.substring(0, crc32Pos)
                + licensekey.substring((crc32Pos + md5StringLength),
                        (crc32Pos + md5StringLength) + (licensekey.length() - crc32Pos - md5StringLength))
                + extensionName + licenseDomain;
        //            CRC32 crcCheck = new CRC32();
        //            crcCheck.update(checkCRc32.getBytes());
        //            long lcrc32String = -1;
        //            try {
        //                lcrc32String = Long.parseLong(crc32String);
        //            } catch (Exception e) {
        //            }
        String md5Check = EncryptUntil.HashMD5(checkCRc32);
        if (!md5Check.equals(md5String))
            return false;

        String strDate = licenseString.substring(11, 15);
        int resultDate = Integer.parseInt(String.valueOf(strDate), 16);
        String DATE_FORMAT = "yyyy-MM-dd";
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
        String createdDate = sdf.format(new Date(resultDate * 24 * 3600 * 1000L));
        if (!checkSameDomain(baseUrl, licenseDomain))
            return false;

        activeKey.setType(type);
        activeKey.setExpiredTime(expiredTime);
        activeKey.setCreatedDate(createdDate);
        activeKey.setLicenseDomain(licenseDomain);
        ConfigUtil.setActiveKey(activeKey);
        ConfigUtil.setIsDevLicense(type.equals("D") ? true : false);
        return true;
    } catch (Exception e) {
        String licenseDomain = "";
        if (baseUrl.contains("https://")) {
            baseUrl = baseUrl.replace("https://", "");
        } else if (baseUrl.contains("http://")) {
            baseUrl = baseUrl.replace("http://", "");
        }
        if (baseUrl.length() > 36) {
            licenseDomain = baseUrl.substring(0, 36);
        } else {
            licenseDomain = baseUrl;
        }
        String checkCRc32 = licensekey.substring(0, crc32Pos)
                + licensekey.substring((crc32Pos + md5StringLength),
                        (crc32Pos + md5StringLength) + (licensekey.length() - crc32Pos - md5StringLength))
                + extensionName + licenseDomain;
        //            CRC32 crcCheck = new CRC32();
        //            crcCheck.update(checkCRc32.getBytes());
        //            long lcrc32String = -1;
        //            try {
        //                lcrc32String = Long.parseLong(crc32String);
        //            } catch (Exception ex) {
        //            }
        String md5Check = EncryptUntil.HashMD5(checkCRc32);
        if (!md5Check.equals(md5String))
            return false;
        String type = licensekey.substring(crc32Pos + md5StringLength, crc32Pos + md5StringLength + 1);
        String strexpiredTime = licensekey.substring(crc32Pos + md5StringLength + 1,
                crc32Pos + md5StringLength + 1 + 2);
        int expiredTime = Integer.parseInt(String.valueOf(strexpiredTime), 16);
        if (!checkSameDomain(baseUrl, licenseDomain))
            return false;
        activeKey.setType(type);
        activeKey.setExpiredTime(expiredTime);
        activeKey.setLicenseDomain(licenseDomain);
        ConfigUtil.setActiveKey(activeKey);
        ConfigUtil.setIsDevLicense(type.equals("D") ? true : false);
        return true;
    }
}

---

From source file:com.alexholmes.hdfsslurper.WorkerThread.java

private long hdfsFileCRC32(Path path) throws IOException {
    InputStream in = null;/*from  w w  w. ja v  a  2 s. c  o m*/
    CRC32 crc = new CRC32();
    try {
        InputStream is = new BufferedInputStream(path.getFileSystem(config.getConfig()).open(path));
        if (config.getCodec() != null) {
            is = config.getCodec().createInputStream(is);
        }
        in = new CheckedInputStream(is, crc);
        org.apache.commons.io.IOUtils.copy(in, new NullOutputStream());
    } finally {
        org.apache.commons.io.IOUtils.closeQuietly(in);
    }
    return crc.getValue();
}

---

From source file:com.aol.advertising.qiao.util.CommonUtils.java

public static long checkSum(byte[] bytes) {
    CRC32 crc = new CRC32();
    crc.update(bytes);//from  w  w w . jav a  2  s .  c  o m
    return crc.getValue();

}

---

From source file:org.apache.hadoop.hdfs.TestLookasideCache.java

/**
 * returns the CRC32 of the buffer//  w  ww  .  j  ava2  s.c o m
 */
private long bufferCRC(byte[] buf) {
    CRC32 crc = new CRC32();
    crc.update(buf, 0, buf.length);
    return crc.getValue();
}

---

From source file:srebrinb.compress.sevenzip.SevenZFile.java

private Archive readHeaders(final byte[] password) throws IOException {
    ByteBuffer buf = ByteBuffer.allocate(12 /* signature + 2 bytes version + 4 bytes CRC */)
            .order(ByteOrder.LITTLE_ENDIAN);
    readFully(buf);//from  w ww.j  a  v a2  s . c  o  m
    final byte[] signature = new byte[6];
    buf.get(signature);
    if (!Arrays.equals(signature, sevenZSignature)) {
        throw new IOException("Bad 7z signature");
    }
    // 7zFormat.txt has it wrong - it's first major then minor
    final byte archiveVersionMajor = buf.get();
    final byte archiveVersionMinor = buf.get();
    if (archiveVersionMajor != 0) {
        throw new IOException(
                String.format("Unsupported 7z version (%d,%d)", archiveVersionMajor, archiveVersionMinor));
    }

    final long startHeaderCrc = 0xffffFFFFL & buf.getInt();
    final StartHeader startHeader = readStartHeader(startHeaderCrc);

    final int nextHeaderSizeInt = (int) startHeader.nextHeaderSize;
    if (nextHeaderSizeInt != startHeader.nextHeaderSize) {
        throw new IOException("cannot handle nextHeaderSize " + startHeader.nextHeaderSize);
    }
    channel.position(SIGNATURE_HEADER_SIZE + startHeader.nextHeaderOffset);
    buf = ByteBuffer.allocate(nextHeaderSizeInt).order(ByteOrder.LITTLE_ENDIAN);
    readFully(buf);
    final CRC32 crc = new CRC32();
    crc.update(buf.array());
    if (startHeader.nextHeaderCrc != crc.getValue()) {
        throw new IOException("NextHeader CRC mismatch");
    }

    Archive archive = new Archive();
    int nid = getUnsignedByte(buf);
    if (nid == NID.kEncodedHeader) {
        buf = readEncodedHeader(buf, archive, password);
        // Archive gets rebuilt with the new header
        archive = new Archive();
        nid = getUnsignedByte(buf);
    }
    if (nid == NID.kHeader) {
        readHeader(buf, archive);
    } else {
        throw new IOException("Broken or unsupported archive: no Header");
    }
    return archive;
}

---

From source file:de.alpharogroup.file.checksum.ChecksumExtensions.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes/* w w  w.j ava 2 s  . c o  m*/
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.CRC32} object.
 */
public static long getCheckSumCRC32(final byte[] bytes) {
    final Checksum checksum = new CRC32();
    checksum.update(bytes, 0, bytes.length);
    final long cs = checksum.getValue();
    return cs;
}

---

From source file:org.apache.hadoop.raid.TestDirectoryRaidEncoder.java

private long createDirectoryFile(FileSystem fileSys, Path name, int repl, long[] fileSizes, long[] blockSizes,
        int[] seeds, long blockSize) throws IOException {
    CRC32 crc = new CRC32();
    assert fileSizes.length == blockSizes.length;
    assert fileSizes.length == seeds.length;
    FSDataOutputStream stm = fileSys.create(name, true, fileSys.getConf().getInt("io.file.buffer.size", 4096),
            (short) repl, blockSize);
    byte[] zeros = new byte[(int) (blockSize)];
    for (int j = 0; j < zeros.length; j++) {
        zeros[j] = 0;//w w  w .j av  a 2  s  .co m
    }
    // fill random data into file
    for (int i = 0; i < fileSizes.length; i++) {
        assert blockSizes[i] <= blockSize;
        byte[] b = new byte[(int) blockSizes[i]];
        long numBlocks = fileSizes[i] / blockSizes[i];
        Random rand = new Random(seeds[i]);
        for (int j = 0; j < numBlocks; j++) {
            rand.nextBytes(b);
            stm.write(b);
            crc.update(b);
            int zeroLen = (int) (blockSize - blockSizes[i]);
            stm.write(zeros, 0, zeroLen);
            crc.update(zeros, 0, zeroLen);
        }
        long lastBlock = fileSizes[i] - numBlocks * blockSizes[i];
        if (lastBlock > 0) {
            b = new byte[(int) lastBlock];
            rand.nextBytes(b);
            stm.write(b);
            crc.update(b);
            if (i + 1 < fileSizes.length) {
                // Not last block of file, write zero
                int zeroLen = (int) (blockSize - lastBlock);
                stm.write(zeros, 0, zeroLen);
                crc.update(zeros, 0, zeroLen);
            }
        }
    }
    stm.close();
    return crc.getValue();
}

---

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