List of usage examples for io.netty.buffer ByteBuf readerIndex
public abstract int readerIndex();
From source file:divconq.pgp.EncryptedFileStream.java
License:Open Source License
public void writeData(byte[] bytes, int offset, int len) { // the first time this is called we need to write headers - those headers // call into this method so clear flag immediately if (!this.writeFirst) { this.writeFirst = true; this.writeFirstLiteral(len); }/*w ww.j a v a 2 s . c om*/ int remaining = len; int avail = this.packetsize - this.packetpos; // packetbuf may have data that has not yet been processed, so if we are doing any writes // we need to write the packet buffer first ByteBuf pbb = this.packetbuf; if (pbb != null) { int bbremaining = pbb.readableBytes(); // only write if there is space available in current packet or if we have a total // amount of data larger than max packet size while ((bbremaining > 0) && ((avail > 0) || (bbremaining + remaining) >= MAX_PACKET_SIZE)) { // out of current packet space? create more packets if (avail == 0) { this.packetsize = MAX_PACKET_SIZE; this.packetpos = 0; this.writeDataInternal((byte) MAX_PARTIAL_LEN); // partial packet length avail = this.packetsize; } // figure out how much we can write to the current packet, write it, update indexes int alen = Math.min(avail, bbremaining); this.writeDataInternal(pbb.array(), pbb.arrayOffset() + pbb.readerIndex(), alen); pbb.skipBytes(alen); bbremaining = pbb.readableBytes(); this.packetpos += alen; avail = this.packetsize - this.packetpos; // our formula always assumes that packetbuf starts at zero offset, anytime // we write out part of the packetbuf we either need to write it all and clear it // or we need to start with a new buffer with data starting at offset 0 if (bbremaining == 0) { pbb.clear(); } else { ByteBuf npb = Hub.instance.getBufferAllocator().heapBuffer(MAX_PACKET_SIZE); npb.writeBytes(pbb, bbremaining); this.packetbuf = npb; pbb.release(); pbb = npb; } } } // only write if there is space available in current packet or if we have a total // amount of data larger than max packet size while ((remaining > 0) && ((avail > 0) || (remaining >= MAX_PACKET_SIZE))) { // out of current packet space? create more packets if (avail == 0) { this.packetsize = MAX_PACKET_SIZE; this.packetpos = 0; this.writeDataInternal((byte) MAX_PARTIAL_LEN); // partial packet length avail = this.packetsize; } // figure out how much we can write to the current packet, write it, update indexes int alen = Math.min(avail, remaining); this.writeDataInternal(bytes, offset, alen); remaining -= alen; offset += alen; this.packetpos += alen; avail = this.packetsize - this.packetpos; } // buffer remaining to build larger packet later if (remaining > 0) { if (this.packetbuf == null) this.packetbuf = Hub.instance.getBufferAllocator().heapBuffer(MAX_PACKET_SIZE); // add to new buffer or add to existing buffer, either way it should be less than max here this.packetbuf.writeBytes(bytes, offset, remaining); } }
From source file:divconq.pgp.EncryptedFileStream.java
License:Open Source License
public void writeData(ByteBuf buf) { this.writeData(buf.array(), buf.arrayOffset() + buf.readerIndex(), buf.readableBytes()); }
From source file:dorkbox.network.connection.KryoExtra.java
License:Apache License
/** * This is NOT ENCRYPTED (and is only done on the loopback connection!) *//*from w w w . j av a 2 s. co m*/ public synchronized void writeCompressed(final Connection_ connection, final ByteBuf buffer, final Object message) throws IOException { // required by RMI and some serializers to determine which connection wrote (or has info about) this object this.rmiSupport = connection.rmiSupport(); ByteBuf objectOutputBuffer = this.tempBuffer; objectOutputBuffer.clear(); // always have to reset everything // write the object to a TEMP buffer! this will be compressed writer.setBuffer(objectOutputBuffer); writeClassAndObject(writer, message); // save off how much data the object took + magic byte int length = objectOutputBuffer.writerIndex(); // NOTE: compression and encryption MUST work with byte[] because they use JNI! // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it... // see: https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf byte[] inputArray; int inputOffset; // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because // the buffer might be a slice of other buffer or a pooled buffer: //noinspection Duplicates if (objectOutputBuffer.hasArray() && objectOutputBuffer.array()[0] == objectOutputBuffer.getByte(0) && objectOutputBuffer.array().length == objectOutputBuffer.capacity()) { // we can use it... inputArray = objectOutputBuffer.array(); inputArrayLength = -1; // this is so we don't REUSE this array accidentally! inputOffset = objectOutputBuffer.arrayOffset(); } else { // we can NOT use it. if (length > inputArrayLength) { inputArrayLength = length; inputArray = new byte[length]; this.inputArray = inputArray; } else { inputArray = this.inputArray; } objectOutputBuffer.getBytes(objectOutputBuffer.readerIndex(), inputArray, 0, length); inputOffset = 0; } ////////// compressing data // we ALWAYS compress our data stream -- because of how AES-GCM pads data out, the small input (that would result in a larger // output), will be negated by the increase in size by the encryption byte[] compressOutput = this.compressOutput; int maxLengthLengthOffset = 4; // length is never negative, so 4 is OK (5 means it's negative) int maxCompressedLength = compressor.maxCompressedLength(length); // add 4 so there is room to write the compressed size to the buffer int maxCompressedLengthWithOffset = maxCompressedLength + maxLengthLengthOffset; // lazy initialize the compression output buffer if (maxCompressedLengthWithOffset > compressOutputLength) { compressOutputLength = maxCompressedLengthWithOffset; compressOutput = new byte[maxCompressedLengthWithOffset]; this.compressOutput = compressOutput; } // LZ4 compress. output offset max 4 bytes to leave room for length of tempOutput data int compressedLength = compressor.compress(inputArray, inputOffset, length, compressOutput, maxLengthLengthOffset, maxCompressedLength); // bytes can now be written to, because our compressed data is stored in a temp array. final int lengthLength = OptimizeUtilsByteArray.intLength(length, true); // correct input. compression output is now buffer input inputArray = compressOutput; inputOffset = maxLengthLengthOffset - lengthLength; // now write the ORIGINAL (uncompressed) length to the front of the byte array (this is NOT THE BUFFER!). This is so we can use the FAST decompress version OptimizeUtilsByteArray.writeInt(inputArray, length, true, inputOffset); // have to copy over the orig data, because we used the temp buffer. Also have to account for the length of the uncompressed size buffer.writeBytes(inputArray, inputOffset, compressedLength + lengthLength); }
From source file:dorkbox.network.connection.KryoExtra.java
License:Apache License
/** * This is NOT ENCRYPTED (and is only done on the loopback connection!) *//*from www . j ava 2s . c o m*/ public Object readCompressed(final Connection_ connection, final ByteBuf buffer, int length) throws IOException { // required by RMI and some serializers to determine which connection wrote (or has info about) this object this.rmiSupport = connection.rmiSupport(); //////////////// // Note: we CANNOT write BACK to the buffer as "temp" storage, since there could be additional data on it! //////////////// ByteBuf inputBuf = buffer; // get the decompressed length (at the beginning of the array) final int uncompressedLength = OptimizeUtilsByteBuf.readInt(buffer, true); final int lengthLength = OptimizeUtilsByteArray.intLength(uncompressedLength, true); // because 1-5 bytes for the decompressed size // have to adjust for uncompressed length length = length - lengthLength; ///////// decompress data -- as it's ALWAYS compressed // NOTE: compression and encryption MUST work with byte[] because they use JNI! // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it... // see: https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf byte[] inputArray; int inputOffset; // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because // the buffer might be a slice of other buffer or a pooled buffer: //noinspection Duplicates if (inputBuf.hasArray() && inputBuf.array()[0] == inputBuf.getByte(0) && inputBuf.array().length == inputBuf.capacity()) { // we can use it... inputArray = inputBuf.array(); inputArrayLength = -1; // this is so we don't REUSE this array accidentally! inputOffset = inputBuf.arrayOffset() + lengthLength; } else { // we can NOT use it. if (length > inputArrayLength) { inputArrayLength = length; inputArray = new byte[length]; this.inputArray = inputArray; } else { inputArray = this.inputArray; } inputBuf.getBytes(inputBuf.readerIndex(), inputArray, 0, length); inputOffset = 0; } // have to make sure to set the position of the buffer, since our conversion to array DOES NOT set the new reader index. buffer.readerIndex(buffer.readerIndex() + length); ///////// decompress data -- as it's ALWAYS compressed byte[] decompressOutputArray = this.decompressOutput; if (uncompressedLength > decompressOutputLength) { decompressOutputLength = uncompressedLength; decompressOutputArray = new byte[uncompressedLength]; this.decompressOutput = decompressOutputArray; decompressBuf = Unpooled.wrappedBuffer(decompressOutputArray); // so we can read via kryo } inputBuf = decompressBuf; // LZ4 decompress, requires the size of the ORIGINAL length (because we use the FAST decompressor) decompressor.decompress(inputArray, inputOffset, decompressOutputArray, 0, uncompressedLength); inputBuf.setIndex(0, uncompressedLength); // read the object from the buffer. reader.setBuffer(inputBuf); return readClassAndObject(reader); // this properly sets the readerIndex, but only if it's the correct buffer }
From source file:dorkbox.network.connection.KryoExtra.java
License:Apache License
public synchronized void writeCrypto(final Connection_ connection, final ByteBuf buffer, final Object message) throws IOException { // required by RMI and some serializers to determine which connection wrote (or has info about) this object this.rmiSupport = connection.rmiSupport(); ByteBuf objectOutputBuffer = this.tempBuffer; objectOutputBuffer.clear(); // always have to reset everything // write the object to a TEMP buffer! this will be compressed writer.setBuffer(objectOutputBuffer); writeClassAndObject(writer, message); // save off how much data the object took int length = objectOutputBuffer.writerIndex(); // NOTE: compression and encryption MUST work with byte[] because they use JNI! // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it... // see: https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf byte[] inputArray; int inputOffset; // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because // the buffer might be a slice of other buffer or a pooled buffer: //noinspection Duplicates if (objectOutputBuffer.hasArray() && objectOutputBuffer.array()[0] == objectOutputBuffer.getByte(0) && objectOutputBuffer.array().length == objectOutputBuffer.capacity()) { // we can use it... inputArray = objectOutputBuffer.array(); inputArrayLength = -1; // this is so we don't REUSE this array accidentally! inputOffset = objectOutputBuffer.arrayOffset(); } else {/*from w w w. j a va 2 s .co m*/ // we can NOT use it. if (length > inputArrayLength) { inputArrayLength = length; inputArray = new byte[length]; this.inputArray = inputArray; } else { inputArray = this.inputArray; } objectOutputBuffer.getBytes(objectOutputBuffer.readerIndex(), inputArray, 0, length); inputOffset = 0; } ////////// compressing data // we ALWAYS compress our data stream -- because of how AES-GCM pads data out, the small input (that would result in a larger // output), will be negated by the increase in size by the encryption byte[] compressOutput = this.compressOutput; int maxLengthLengthOffset = 4; // length is never negative, so 4 is OK (5 means it's negative) int maxCompressedLength = compressor.maxCompressedLength(length); // add 4 so there is room to write the compressed size to the buffer int maxCompressedLengthWithOffset = maxCompressedLength + maxLengthLengthOffset; // lazy initialize the compression output buffer if (maxCompressedLengthWithOffset > compressOutputLength) { compressOutputLength = maxCompressedLengthWithOffset; compressOutput = new byte[maxCompressedLengthWithOffset]; this.compressOutput = compressOutput; } // LZ4 compress. output offset max 4 bytes to leave room for length of tempOutput data int compressedLength = compressor.compress(inputArray, inputOffset, length, compressOutput, maxLengthLengthOffset, maxCompressedLength); // bytes can now be written to, because our compressed data is stored in a temp array. final int lengthLength = OptimizeUtilsByteArray.intLength(length, true); // correct input. compression output is now encryption input inputArray = compressOutput; inputOffset = maxLengthLengthOffset - lengthLength; // now write the ORIGINAL (uncompressed) length to the front of the byte array. This is so we can use the FAST decompress version OptimizeUtilsByteArray.writeInt(inputArray, length, true, inputOffset); // correct length for encryption length = compressedLength + lengthLength; // +1 to +4 for the uncompressed size bytes /////// encrypting data. final long nextGcmSequence = connection.getNextGcmSequence(); // this is a threadlocal, so that we don't clobber other threads that are performing crypto on the same connection at the same time final ParametersWithIV cryptoParameters = connection.getCryptoParameters(); BigEndian.Long_.toBytes(nextGcmSequence, cryptoParameters.getIV(), 4); // put our counter into the IV final GCMBlockCipher aes = this.aesEngine; aes.reset(); aes.init(true, cryptoParameters); byte[] cryptoOutput; // lazy initialize the crypto output buffer int cryptoSize = length + 16; // from: aes.getOutputSize(length); // 'output' is the temp byte array if (cryptoSize > cryptoOutputLength) { cryptoOutputLength = cryptoSize; cryptoOutput = new byte[cryptoSize]; this.cryptoOutput = cryptoOutput; } else { cryptoOutput = this.cryptoOutput; } int encryptedLength = aes.processBytes(inputArray, inputOffset, length, cryptoOutput, 0); try { // authentication tag for GCM encryptedLength += aes.doFinal(cryptoOutput, encryptedLength); } catch (Exception e) { throw new IOException("Unable to AES encrypt the data", e); } // write out our GCM counter OptimizeUtilsByteBuf.writeLong(buffer, nextGcmSequence, true); // have to copy over the orig data, because we used the temp buffer buffer.writeBytes(cryptoOutput, 0, encryptedLength); }
From source file:dorkbox.network.connection.KryoExtra.java
License:Apache License
public Object readCrypto(final Connection_ connection, final ByteBuf buffer, int length) throws IOException { // required by RMI and some serializers to determine which connection wrote (or has info about) this object this.rmiSupport = connection.rmiSupport(); //////////////// // Note: we CANNOT write BACK to the buffer as "temp" storage, since there could be additional data on it! //////////////// ByteBuf inputBuf = buffer; final long gcmIVCounter = OptimizeUtilsByteBuf.readLong(buffer, true); int lengthLength = OptimizeUtilsByteArray.longLength(gcmIVCounter, true); // have to adjust for the gcmIVCounter length = length - lengthLength;/*from w w w .j a va 2 s . co m*/ /////////// decrypting data // NOTE: compression and encryption MUST work with byte[] because they use JNI! // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it... // see: https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf byte[] inputArray; int inputOffset; // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because // the buffer might be a slice of other buffer or a pooled buffer: //noinspection Duplicates if (inputBuf.hasArray() && inputBuf.array()[0] == inputBuf.getByte(0) && inputBuf.array().length == inputBuf.capacity()) { // we can use it... inputArray = inputBuf.array(); inputArrayLength = -1; // this is so we don't REUSE this array accidentally! inputOffset = inputBuf.arrayOffset() + lengthLength; } else { // we can NOT use it. if (length > inputArrayLength) { inputArrayLength = length; inputArray = new byte[length]; this.inputArray = inputArray; } else { inputArray = this.inputArray; } inputBuf.getBytes(inputBuf.readerIndex(), inputArray, 0, length); inputOffset = 0; } // have to make sure to set the position of the buffer, since our conversion to array DOES NOT set the new reader index. buffer.readerIndex(buffer.readerIndex() + length); // this is a threadlocal, so that we don't clobber other threads that are performing crypto on the same connection at the same time final ParametersWithIV cryptoParameters = connection.getCryptoParameters(); BigEndian.Long_.toBytes(gcmIVCounter, cryptoParameters.getIV(), 4); // put our counter into the IV final GCMBlockCipher aes = this.aesEngine; aes.reset(); aes.init(false, cryptoParameters); int cryptoSize = length - 16; // from: aes.getOutputSize(length); // lazy initialize the decrypt output buffer byte[] decryptOutputArray; if (cryptoSize > decryptOutputLength) { decryptOutputLength = cryptoSize; decryptOutputArray = new byte[cryptoSize]; this.decryptOutput = decryptOutputArray; decryptBuf = Unpooled.wrappedBuffer(decryptOutputArray); } else { decryptOutputArray = this.decryptOutput; } int decryptedLength = aes.processBytes(inputArray, inputOffset, length, decryptOutputArray, 0); try { // authentication tag for GCM decryptedLength += aes.doFinal(decryptOutputArray, decryptedLength); } catch (Exception e) { throw new IOException("Unable to AES decrypt the data", e); } ///////// decompress data -- as it's ALWAYS compressed // get the decompressed length (at the beginning of the array) inputArray = decryptOutputArray; final int uncompressedLength = OptimizeUtilsByteArray.readInt(inputArray, true); inputOffset = OptimizeUtilsByteArray.intLength(uncompressedLength, true); // because 1-4 bytes for the decompressed size byte[] decompressOutputArray = this.decompressOutput; if (uncompressedLength > decompressOutputLength) { decompressOutputLength = uncompressedLength; decompressOutputArray = new byte[uncompressedLength]; this.decompressOutput = decompressOutputArray; decompressBuf = Unpooled.wrappedBuffer(decompressOutputArray); // so we can read via kryo } inputBuf = decompressBuf; // LZ4 decompress, requires the size of the ORIGINAL length (because we use the FAST decompressor decompressor.decompress(inputArray, inputOffset, decompressOutputArray, 0, uncompressedLength); inputBuf.setIndex(0, uncompressedLength); // read the object from the buffer. reader.setBuffer(inputBuf); return readClassAndObject(reader); // this properly sets the readerIndex, but only if it's the correct buffer }
From source file:dorkbox.network.pipeline.ByteBufInput.java
License:Apache License
public final void setBuffer(ByteBuf byteBuf) { this.byteBuf = byteBuf; if (byteBuf != null) { startIndex = byteBuf.readerIndex(); // where the object starts... } else {/* ww w. ja v a 2 s . c om*/ startIndex = 0; } }
From source file:dorkbox.network.pipeline.ByteBufInput.java
License:Apache License
/** * Returns true if enough bytes are available to read an int with {@link #readInt(boolean)}. *//*from www .j a va2 s . c o m*/ @Override public boolean canReadInt() throws KryoException { ByteBuf buffer = byteBuf; int limit = buffer.writerIndex(); if (limit - buffer.readerIndex() >= 5) { return true; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } return true; }
From source file:dorkbox.network.pipeline.ByteBufInput.java
License:Apache License
/** * Returns true if enough bytes are available to read a long with {@link #readLong(boolean)}. *//*from w w w. ja va 2 s . c o m*/ @Override public boolean canReadLong() throws KryoException { ByteBuf buffer = byteBuf; int limit = buffer.writerIndex(); if (limit - buffer.readerIndex() >= 9) { return true; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } if ((buffer.readByte() & 0x80) == 0) { return true; } if (buffer.readerIndex() == limit) { return false; } return true; }
From source file:dorkbox.network.pipeline.ByteBufInput.java
License:Apache License
private String readAscii() { ByteBuf buffer = byteBuf; int start = buffer.readerIndex() - 1; int b;/*from w ww . j a va2 s. c om*/ do { b = buffer.readByte(); } while ((b & 0x80) == 0); int i = buffer.readerIndex() - 1; buffer.setByte(i, buffer.getByte(i) & 0x7F); // Mask end of ascii bit. int capp = buffer.readerIndex() - start; byte[] ba = new byte[capp]; buffer.getBytes(start, ba); @SuppressWarnings("deprecation") String value = new String(ba, 0, 0, capp); buffer.setByte(i, buffer.getByte(i) | 0x80); return value; }