Examples with SeekableByteChannel java.nio.channels.SeekableByteChannel used on opensource projects

Example 26 with SeekableByteChannel

use of java.nio.channels.SeekableByteChannel in project graal by oracle.

the class TruffleFile method readAllBytes.

/**
 * Reads a file content as bytes.
 *
 * @return the created {@link BufferedReader}
 * @throws IOException in case of IO error
 * @throws OutOfMemoryError if an array of a file size cannot be allocated
 * @throws SecurityException if the {@link FileSystem} denied the operation
 * @since 1.0
 */
public byte[] readAllBytes() throws IOException {
    try (SeekableByteChannel channel = newByteChannel(Collections.emptySet())) {
        long sizel = channel.size();
        if (sizel > MAX_BUFFER_SIZE) {
            throw new OutOfMemoryError("File size is too large.");
        }
        try (InputStream in = Channels.newInputStream(channel)) {
            int size = (int) sizel;
            byte[] buf = new byte[size];
            int read = 0;
            while (true) {
                int n;
                while ((n = in.read(buf, read, size - read)) > 0) {
                    read += n;
                }
                if (n < 0 || (n = in.read()) < 0) {
                    break;
                }
                if (size << 1 <= MAX_BUFFER_SIZE) {
                    size = Math.max(size << 1, BUFFER_SIZE);
                } else if (size == MAX_BUFFER_SIZE) {
                    throw new OutOfMemoryError("Required array size too large");
                } else {
                    size = MAX_BUFFER_SIZE;
                }
                buf = Arrays.copyOf(buf, size);
                buf[read++] = (byte) n;
            }
            return size == read ? buf : Arrays.copyOf(buf, read);
        }
    } catch (IOException | OutOfMemoryError | SecurityException e) {
        throw e;
    } catch (Throwable t) {
        throw wrapHostException(t);
    }
}

Example 27 with SeekableByteChannel

use of java.nio.channels.SeekableByteChannel in project FinalCrypt by ron-from-nl.

the class FinalCrypt method createTargetDestinToken.

private // Tested
ByteBuffer createTargetDestinToken(// Tested
Path cipherSourcePath) {
    ByteBuffer plainTextTokenBuffer = ByteBuffer.allocate(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    plainTextTokenBuffer.clear();
    ByteBuffer cipherBitTokenBuffer = ByteBuffer.allocate(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    cipherBitTokenBuffer.clear();
    ByteBuffer encryptedTokenBuffer = ByteBuffer.allocate(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    encryptedTokenBuffer.clear();
    ByteBuffer targetDstTokenBuffer = ByteBuffer.allocate(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length() * 2);
    targetDstTokenBuffer.clear();
    long readCipherSourceChannelTransfered = 0;
    // Create plaint text Buffer
    plainTextTokenBuffer.put(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.getBytes());
    // Create Cipher Buffer
    try (final SeekableByteChannel readCipherSourceChannel = Files.newByteChannel(cipherSourcePath, EnumSet.of(StandardOpenOption.READ))) {
        // readCipherSourceChannel.position(readCipherSourceChannelPosition);
        readCipherSourceChannelTransfered = readCipherSourceChannel.read(cipherBitTokenBuffer);
        cipherBitTokenBuffer.flip();
        readCipherSourceChannel.close();
    } catch (IOException ex) {
        ui.error("Error: getTargetDestinToken: readCipherSourceChannel " + ex.getMessage() + "\r\n");
    }
    // Create Encrypted Token Buffer
    encryptedTokenBuffer = encryptBuffer(plainTextTokenBuffer, cipherBitTokenBuffer);
    // Create Target Destin Token Buffer
    byte[] tokenArray = new byte[(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length() * 2)];
    for (int x = 0; x < plainTextTokenBuffer.capacity(); x++) {
        tokenArray[x] = plainTextTokenBuffer.array()[x];
    }
    for (int x = 0; x < encryptedTokenBuffer.capacity(); x++) {
        tokenArray[(FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length() + x)] = encryptedTokenBuffer.array()[x];
    }
    targetDstTokenBuffer.put(tokenArray);
    targetDstTokenBuffer.flip();
    return targetDstTokenBuffer;
}

Example 28 with SeekableByteChannel

use of java.nio.channels.SeekableByteChannel in project FinalCrypt by ron-from-nl.

the class MySimpleFCFileVisitor method targetHasAuthenticatedFCToken.

public static synchronized // Tested
boolean targetHasAuthenticatedFCToken(// Tested
UI ui, // Tested
Path targetSourcePath, // Tested
Path cipherSourcePath) {
    boolean readTargetSourceChannelError = false;
    boolean cipherAuthenticatedTargetSource = false;
    ByteBuffer targetSrcTokenBuffer = ByteBuffer.allocate(FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length() * 2);
    targetSrcTokenBuffer.clear();
    ByteBuffer targetEncryptedTokenBuffer = ByteBuffer.allocate(FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    targetEncryptedTokenBuffer.clear();
    ByteBuffer cipherSourceBuffer = ByteBuffer.allocate(FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    cipherSourceBuffer.clear();
    ByteBuffer cipherDecryptedTokenBuffer = ByteBuffer.allocate(FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    cipherDecryptedTokenBuffer.clear();
    long readTargetSourceChannelPosition = 0;
    long readTargetSourceChannelTransfered = 0;
    long readCipherSourceChannelPosition = 0;
    long readCipherSourceChannelTransfered = 0;
    // Create Target Source Token Buffer
    try (final SeekableByteChannel readTargetSourceChannel = Files.newByteChannel(targetSourcePath, EnumSet.of(StandardOpenOption.READ))) {
        // Fill up inputFileBuffer
        // readTargetSourceChannel.position(readTargetSourceChannelPosition);
        // readTargetSourceChannelTransfered = readTargetSourceChannel.read(targetSrcTokenBuffer); targetSrcTokenBuffer.flip();
        readTargetSourceChannel.read(targetSrcTokenBuffer);
        targetSrcTokenBuffer.flip();
        readTargetSourceChannel.close();
    } catch (IOException ex) {
        readTargetSourceChannelError = true;
        ui.error("Error: targetHasAuthenticatedToken: readTargetSourceChannel " + ex.getMessage() + "\r\n");
    }
    // Encrypted Token Buffer
    targetEncryptedTokenBuffer.put(targetSrcTokenBuffer.array(), FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length(), FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN.length());
    targetEncryptedTokenBuffer.flip();
    if (!readTargetSourceChannelError) {
        try (final SeekableByteChannel readCipherSourceChannel = Files.newByteChannel(cipherSourcePath, EnumSet.of(StandardOpenOption.READ))) {
            // Fill up cipherFileBuffer
            // readCipherSourceChannel.position(readCipherSourceChannelPosition);
            // readCipherSourceChannelTransfered = readCipherSourceChannel.read(cipherSourceBuffer);
            readCipherSourceChannel.read(cipherSourceBuffer);
            cipherSourceBuffer.flip();
            readCipherSourceChannel.close();
        } catch (IOException ex) {
            ui.error("Error: cipherAuthenticatedTargetSource readCipherSourceChannel " + ex.getMessage() + "\r\n");
        }
        // Create Encrypted Token Buffer
        cipherDecryptedTokenBuffer = FinalCrypt.encryptBuffer(targetEncryptedTokenBuffer, cipherSourceBuffer);
        String cipherDecryptedTokenBufferString = new String(cipherDecryptedTokenBuffer.array(), StandardCharsets.UTF_8);
        // Authenticate Cipher Token against Target Token
        if (cipherDecryptedTokenBufferString.equals(FinalCrypt.FINALCRYPT_PLAIN_IEXT_AUTHENTICATION_TOKEN)) {
            cipherAuthenticatedTargetSource = true;
        } else {
            cipherAuthenticatedTargetSource = false;
        }
    } else {
        cipherAuthenticatedTargetSource = false;
    }
    return cipherAuthenticatedTargetSource;
}

Example 29 with SeekableByteChannel

use of java.nio.channels.SeekableByteChannel in project FinalCrypt by ron-from-nl.

the class DeviceController method getDeviceSize1.

// Get size of device
public static synchronized long getDeviceSize1(UI ui, Path path) {
    long deviceSize = 0;
    try (final SeekableByteChannel deviceChannel = Files.newByteChannel(path, EnumSet.of(StandardOpenOption.READ))) {
        deviceSize = deviceChannel.size();
        deviceChannel.close();
    } catch (IOException ex) {
        ui.status(ex.getMessage(), true);
    }
    return deviceSize;
}

Example 30 with SeekableByteChannel

use of java.nio.channels.SeekableByteChannel in project FinalCrypt by ron-from-nl.

the class DeviceController method readPos.

public static synchronized byte[] readPos(FCPath fcPath, long pos, long length) {
    long readInputDeviceChannelTransfered = 0;
    ByteBuffer inputDeviceBuffer = ByteBuffer.allocate((int) length);
    inputDeviceBuffer.clear();
    try (final SeekableByteChannel readInputDeviceChannel = Files.newByteChannel(fcPath.path, EnumSet.of(StandardOpenOption.READ))) {
        readInputDeviceChannel.position(pos);
        readInputDeviceChannelTransfered = readInputDeviceChannel.read(inputDeviceBuffer);
        inputDeviceBuffer.flip();
        readInputDeviceChannel.close();
    // ui.log("Read Pos " + pos + " Transfered: " + readInputDeviceChannelTransfered + "\r\n");
    } catch (IOException ex) {
        ui.status("Device().read(..) " + ex.getMessage(), true);
    }
    return inputDeviceBuffer.array();
}