Example usage for org.apache.poi.util LittleEndian getInt

Introduction

In this page you can find the example usage for org.apache.poi.util LittleEndian getInt.

Prototype

public static int getInt(byte[] data) 

Source Link

Document

get an int value from the beginning of a byte array

Usage

From source file:Coop.argo.hwp.v5.HwpTextExtractorV5.java

License:Apache License

private static Key readKey(InputStream input) throws IOException {
    byte[] data = new byte[260];

    input.read(data, 0, 4); // TAG,
    // HWPTAG_DISTRIBUTE_DOC_DATA ?
    // long recordHeader = LittleEndian.getUInt(data);
    // log.debug("TAG:   {}", recordHeader & 0x3FF);
    // log.debug("LEVEL: {}", (recordHeader >> 10) & 0x3FF);
    // log.debug("SIZE:  {}", (recordHeader >> 20) & 0xFFF);

    // https://groups.google.com/forum/#!msg/hwp-foss/d2KL2ypR89Q/lCTkebPcIYYJ

    input.read(data, 0, 256);/* ww w. j  a  v  a  2 s.c  o m*/

    SRand srand = new SRand(LittleEndian.getInt(data));
    byte xor = 0;
    for (int i = 0, n = 0; i < 256; i++, n--) {
        if (n == 0) {
            xor = (byte) (srand.rand() & 0xFF);
            n = (int) ((srand.rand() & 0xF) + 1);
        }
        if (i >= 4) {
            data[i] = (byte) ((data[i]) ^ (xor));
        }
    }

    int offset = 4 + (data[0] & 0xF);
    byte[] key = Arrays.copyOfRange(data, offset, offset + 16);

    SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
    return secretKey;
}

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From source file:org.textmining.extraction.word.model.CHPBinTable.java

License:Open Source License

/**
 * Constructor used to read a binTable in from a Word document.
 * @param documentStream/*  w w w .j a  va2s.  c om*/
 * @param tableStream
 * @param offset
 * @param size
 * @param fcMin
 * @param fc2Cp TODO
 * @param textPieces TODO
 */
public CHPBinTable(byte[] documentStream, byte[] tableStream, int offset, int size, int fcMin,
        NodeHelper fc2Cp) {
    PlexOfCps binTable = new PlexOfCps(tableStream, offset, size, 4);

    int length = binTable.length();
    for (int x = 0; x < length; x++) {
        GenericPropertyNode node = binTable.getProperty(x);

        int pageNum = LittleEndian.getInt(node.getBytes());
        int pageOffset = POIFSConstants.SMALLER_BIG_BLOCK_SIZE * pageNum;

        CHPFormattedDiskPage cfkp = new CHPFormattedDiskPage(documentStream, pageOffset, fcMin, fc2Cp);

        int fkpSize = cfkp.size();

        for (int y = 0; y < fkpSize; y++) {
            _textRuns.add(cfkp.getCHPX(y));
        }
    }
    fc2Cp.sortNodes(_textRuns, false);
}

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