Java Code Examples for org.whispersystems.signalservice.internal.util.Util#toIntExact()

The following examples show how to use org.whispersystems.signalservice.internal.util.Util#toIntExact() . 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: AttachmentCipherInputStream.java    From mollyim-android with GNU General Public License v3.0 5 votes vote down vote up 
private static void verifyMac(InputStream inputStream, long length, Mac mac, byte[] theirDigest)
    throws InvalidMacException
{
  try {
    MessageDigest   digest        = MessageDigest.getInstance("SHA256");
    int             remainingData = Util.toIntExact(length) - mac.getMacLength();
    byte[]          buffer        = new byte[4096];

    while (remainingData > 0) {
      int read = inputStream.read(buffer, 0, Math.min(buffer.length, remainingData));
      mac.update(buffer, 0, read);
      digest.update(buffer, 0, read);
      remainingData -= read;
    }

    byte[] ourMac   = mac.doFinal();
    byte[] theirMac = new byte[mac.getMacLength()];
    Util.readFully(inputStream, theirMac);

    if (!MessageDigest.isEqual(ourMac, theirMac)) {
      throw new InvalidMacException("MAC doesn't match!");
    }

    byte[] ourDigest = digest.digest(theirMac);

    if (theirDigest != null && !MessageDigest.isEqual(ourDigest, theirDigest)) {
      throw new InvalidMacException("Digest doesn't match!");
    }

  } catch (IOException | ArithmeticException e1) {
    throw new InvalidMacException(e1);
  } catch (NoSuchAlgorithmException e) {
    throw new AssertionError(e);
  }
}
Example 2
Source File: AttachmentCipherInputStream.java    From bcm-android with GNU General Public License v3.0 5 votes vote down vote up 
private static void verifyMac(File file, Mac mac, byte[] theirDigest)
    throws FileNotFoundException, InvalidMacException
{
  try {
    MessageDigest   digest        = MessageDigest.getInstance("SHA256");
    FileInputStream fin           = new FileInputStream(file);
    int             remainingData = Util.toIntExact(file.length()) - mac.getMacLength();
    byte[]          buffer        = new byte[4096];

    while (remainingData > 0) {
      int read = fin.read(buffer, 0, Math.min(buffer.length, remainingData));
      mac.update(buffer, 0, read);
      digest.update(buffer, 0, read);
      remainingData -= read;
    }

    byte[] ourMac   = mac.doFinal();
    byte[] theirMac = new byte[mac.getMacLength()];
    Util.readFully(fin, theirMac);

    if (!MessageDigest.isEqual(ourMac, theirMac)) {
      throw new InvalidMacException("MAC doesn't match!");
    }

    byte[] ourDigest = digest.digest(theirMac);

    if (!MessageDigest.isEqual(ourDigest, theirDigest)) {
      throw new InvalidMacException("Digest doesn't match!");
    }

  } catch (IOException | ArithmeticException e1) {
    throw new InvalidMacException(e1);
  } catch (NoSuchAlgorithmException e) {
    throw new AssertionError(e);
  }
}
Example 3
Source File: AttachmentCipherInputStream.java    From libsignal-service-java with GNU General Public License v3.0 5 votes vote down vote up 
private static void verifyMac(InputStream inputStream, long length, Mac mac, byte[] theirDigest)
    throws InvalidMacException
{
  try {
    MessageDigest   digest        = MessageDigest.getInstance("SHA256");
    int             remainingData = Util.toIntExact(length) - mac.getMacLength();
    byte[]          buffer        = new byte[4096];

    while (remainingData > 0) {
      int read = inputStream.read(buffer, 0, Math.min(buffer.length, remainingData));
      mac.update(buffer, 0, read);
      digest.update(buffer, 0, read);
      remainingData -= read;
    }

    byte[] ourMac   = mac.doFinal();
    byte[] theirMac = new byte[mac.getMacLength()];
    Util.readFully(inputStream, theirMac);

    if (!MessageDigest.isEqual(ourMac, theirMac)) {
      throw new InvalidMacException("MAC doesn't match!");
    }

    byte[] ourDigest = digest.digest(theirMac);

    if (theirDigest != null && !MessageDigest.isEqual(ourDigest, theirDigest)) {
      throw new InvalidMacException("Digest doesn't match!");
    }

  } catch (IOException | ArithmeticException e1) {
    throw new InvalidMacException(e1);
  } catch (NoSuchAlgorithmException e) {
    throw new AssertionError(e);
  }
}
Example 4
Source File: PaddingInputStream.java    From mollyim-android with GNU General Public License v3.0 4 votes vote down vote up 
@Override
public int available() throws IOException {
  return super.available() + Util.toIntExact(paddingRemaining);
}
Example 5
Source File: PaddingInputStream.java    From bcm-android with GNU General Public License v3.0 4 votes vote down vote up 
@Override
public int available() throws IOException {
  return super.available() + Util.toIntExact(paddingRemaining);
}
Example 6
Source File: PaddingInputStream.java    From libsignal-service-java with GNU General Public License v3.0 4 votes vote down vote up 
@Override
public int available() throws IOException {
  return super.available() + Util.toIntExact(paddingRemaining);
}