Remove SignApk output limitation of 2GiB

    private static class ZipSections {

        DataSource beforeCentralDir;

        // The following fields are still valid after closing the backing DataSource.

        long beforeCentralDirSize;

        ByteBuffer centralDir;

        ByteBuffer eocd;

    }

        }

        ZipSections result = new ZipSections();

        result.beforeCentralDir = apk.slice(0, centralDirStartOffset);

        result.beforeCentralDirSize = result.beforeCentralDir.size();

        long centralDirSize = centralDirEndOffset - centralDirStartOffset;

        if (centralDirSize >= Integer.MAX_VALUE) throw new IndexOutOfBoundsException();

                    // signatures)

                    apkSigner.inputApkSigningBlock(null);

                    // Build the output APK in memory, by copying input APK's ZIP entries across

                    // and then signing the output APK.

                    ByteArrayOutputStream v1SignedApkBuf = new ByteArrayOutputStream();

                    CountingOutputStream outputJarCounter =

                            new CountingOutputStream(v1SignedApkBuf);

                            new CountingOutputStream(outputFile);

                    JarOutputStream outputJar = new JarOutputStream(outputJarCounter);

                    // Use maximum compression for compressed entries because the APK lives forever

                    // on the system partition.

                        addV1Signature(apkSigner, addV1SignatureRequest, outputJar, timestamp);

                        addV1SignatureRequest.done();

                    }

                    // close output and switch to input mode

                    outputJar.close();

                    ByteBuffer v1SignedApk = ByteBuffer.wrap(v1SignedApkBuf.toByteArray());

                    v1SignedApkBuf.reset();

                    ByteBuffer[] outputChunks = new ByteBuffer[] {v1SignedApk};

                    outputJar = null;

                    outputJarCounter = null;

                    outputFile = null;

                    RandomAccessFile v1SignedApk = new RandomAccessFile(outputFilename, "r");

                    ZipSections zipSections = findMainZipSections(DataSources.asDataSource(

                            v1SignedApk));

                    eocd.put(zipSections.eocd);

                    eocd.flip();

                    eocd.order(ByteOrder.LITTLE_ENDIAN);

                    ByteBuffer[] outputChunks = new ByteBuffer[] {};

                    // This loop is supposed to be iterated twice at most.

                    // The second pass is to align the file size after amending EOCD comments

                    // with assumption that re-generated signing block would be the same size.

                                modifiedEocd,

                                zipSections.beforeCentralDir.size() + padding +

                                apkSigningBlock.length);

                        if (zipSections.beforeCentralDir.size() >= Integer.MAX_VALUE) {

                            throw new IndexOutOfBoundsException();

                        }

                        outputChunks =

                                new ByteBuffer[] {

                                        zipSections.beforeCentralDir.getByteBuffer(0,

                                                (int)zipSections.beforeCentralDir.size()),

                                        ByteBuffer.allocate(padding),

                                        ByteBuffer.wrap(apkSigningBlock),

                                        zipSections.centralDir,

                        // Calculate the file size

                        eocd = modifiedEocd;

                        int fileSize = 0;

                        long fileSize = zipSections.beforeCentralDirSize;

                        for (ByteBuffer buf : outputChunks) {

                            fileSize += buf.remaining();

                        }

                            break;

                        }

                        // Pad EOCD comment to align the file size.

                        int commentLen = alignment - fileSize % alignment;

                        int commentLen = alignment - (int)(fileSize % alignment);

                        modifiedEocd = ByteBuffer.allocate(eocd.remaining() + commentLen);

                        modifiedEocd.put(eocd);

                        modifiedEocd.rewind();

                        eocd = modifiedEocd;

                    }

                    // close input and switch back to output mode

                    v1SignedApk.close();

                    v1SignedApk = null;

                    outputFile = new FileOutputStream(outputFilename, true);

                    outputFile.getChannel().truncate(zipSections.beforeCentralDirSize);

                    // This assumes outputChunks are array-backed. To avoid this assumption, the

                    // code could be rewritten to use FileChannel.

                    for (ByteBuffer outputChunk : outputChunks) {