added PDFBOX specifc library

6 files changed, 804 insertions, 0 deletions

diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXBackend.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXBackend.java
new file mode 100644
index 00000000..ba1e0088
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXBackend.java
@@ -0,0 +1,40 @@
+package at.gv.egiz.pdfas.lib.impl.pdfbox;
+
+import at.gv.egiz.pdfas.lib.backend.PDFASBackend;
+import at.gv.egiz.pdfas.lib.impl.pdfbox.placeholder.PDFBoxPlaceholderExtractor;
+import at.gv.egiz.pdfas.lib.impl.placeholder.PlaceholderExtractor;
+import at.gv.egiz.pdfas.lib.impl.signing.IPdfSigner;
+import at.gv.egiz.pdfas.lib.impl.signing.pdfbox.PADESPDFBOXSigner;
+import at.gv.egiz.pdfas.lib.impl.verify.VerifyBackend;
+import at.gv.egiz.pdfas.lib.impl.verify.pdfbox.PDFBOXVerifier;
+
+public class PDFBOXBackend implements PDFASBackend {
+
+	private static final String NAME = "PDFBOX_BACKEND";
+	
+	@Override
+	public String getName() {
+		return NAME;
+	}
+
+	@Override
+	public boolean usedAsDefault() {
+		return true;
+	}
+
+	@Override
+	public IPdfSigner getPdfSigner() {
+		return new PADESPDFBOXSigner();
+	}
+
+	@Override
+	public PlaceholderExtractor getPlaceholderExtractor() {
+		return new PDFBoxPlaceholderExtractor();
+	}
+
+	@Override
+	public VerifyBackend getVerifier() {
+		return new PDFBOXVerifier();
+	}
+
+}
diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXObject.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXObject.java
new file mode 100644
index 00000000..f80df075
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/PDFBOXObject.java
@@ -0,0 +1,59 @@
+package at.gv.egiz.pdfas.lib.impl.pdfbox;
+
+import java.io.IOException;
+
+import javax.activation.DataSource;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+
+import at.gv.egiz.pdfas.lib.impl.status.OperationStatus;
+import at.gv.egiz.pdfas.lib.impl.status.PDFObject;
+
+public class PDFBOXObject extends PDFObject {
+
+	private PDDocument doc;
+	
+	public PDFBOXObject(OperationStatus operationStatus) {
+		super(operationStatus);
+	}
+
+	@Override
+	protected void finalize() throws Throwable {
+		super.finalize();
+		if(doc != null) {
+			doc.close();
+		}
+	}
+	
+	public void close() {
+		if(doc != null) {
+			try {
+				doc.close();
+				//System.gc();
+			} catch(Throwable e) {
+				// ignore!
+			}
+			doc = null;
+		}
+	}
+	
+	public void setOriginalDocument(DataSource originalDocument) throws IOException {
+		this.originalDocument = originalDocument;
+		if(doc != null) {
+			doc.close();
+		}
+		this.doc = PDDocument.load(this.originalDocument.getInputStream());
+		if(this.doc != null) {
+			this.doc.getDocument().setWarnMissingClose(false);
+		}
+	}
+	
+	public PDDocument getDocument() {
+		return this.doc;
+	}
+
+	@Override
+	public String getPDFVersion() {
+		return String.valueOf(getDocument().getDocument().getVersion());
+	}
+}
diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/PDFBoxPlaceholderExtractor.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/PDFBoxPlaceholderExtractor.java
new file mode 100644
index 00000000..18099b23
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/PDFBoxPlaceholderExtractor.java
@@ -0,0 +1,24 @@
+package at.gv.egiz.pdfas.lib.impl.pdfbox.placeholder;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.lib.impl.pdfbox.PDFBOXObject;
+import at.gv.egiz.pdfas.lib.impl.placeholder.PlaceholderExtractor;
+import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderData;
+import at.gv.egiz.pdfas.lib.impl.status.PDFObject;
+
+public class PDFBoxPlaceholderExtractor implements PlaceholderExtractor {
+
+	@Override
+	public SignaturePlaceholderData extract(PDFObject doc,
+			String placeholderId, int matchMode) throws PdfAsException {
+
+		if (doc instanceof PDFBOXObject) {
+			PDFBOXObject object = (PDFBOXObject) doc;
+			return SignaturePlaceholderExtractor.extract(object.getDocument(),
+					placeholderId, matchMode);
+		}
+
+		throw new PdfAsException("INVALID STATE");
+	}
+
+}
diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/SignaturePlaceholderExtractor.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/SignaturePlaceholderExtractor.java
new file mode 100644
index 00000000..fe1c0ee7
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/placeholder/SignaturePlaceholderExtractor.java
@@ -0,0 +1,371 @@
+/*******************************************************************************
+ * <copyright> Copyright 2014 by E-Government Innovation Center EGIZ, Graz, Austria </copyright>
+ * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
+ * joint initiative of the Federal Chancellery Austria and Graz University of
+ * Technology.
+ * 
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ * 
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ ******************************************************************************/
+/**
+ * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
+ * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
+ * joint initiative of the Federal Chancellery Austria and Graz University of
+ * Technology.
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ */
+package at.gv.egiz.pdfas.lib.impl.pdfbox.placeholder;
+
+import java.awt.geom.AffineTransform;
+import java.awt.geom.NoninvertibleTransformException;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Vector;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.pdfbox.cos.COSBase;
+import org.apache.pdfbox.cos.COSName;
+import org.apache.pdfbox.exceptions.WrappedIOException;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObject;
+import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;
+import org.apache.pdfbox.util.Matrix;
+import org.apache.pdfbox.util.PDFOperator;
+import org.apache.pdfbox.util.PDFStreamEngine;
+import org.apache.pdfbox.util.ResourceLoader;
+
+import at.gv.egiz.pdfas.common.exceptions.PDFIOException;
+import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.common.exceptions.PlaceholderExtractionException;
+import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderContext;
+import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderData;
+import at.knowcenter.wag.egov.egiz.pdf.TablePos;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.BinaryBitmap;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.LuminanceSource;
+import com.google.zxing.MultiFormatReader;
+import com.google.zxing.NotFoundException;
+import com.google.zxing.ReaderException;
+import com.google.zxing.Result;
+import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
+import com.google.zxing.common.HybridBinarizer;
+
+/**
+ * Extract all relevant information from a placeholder image.
+ *
+ * @author exthex
+ *
+ */
+public class SignaturePlaceholderExtractor extends PDFStreamEngine {
+	/**
+	 * The log.
+	 */
+	private static Log log = LogFactory
+			.getLog(SignaturePlaceholderExtractor.class);
+
+	public static final String QR_PLACEHOLDER_IDENTIFIER = "PDF-AS-POS";
+	public static final int PLACEHOLDER_MATCH_MODE_STRICT = 0;
+	public static final int PLACEHOLDER_MATCH_MODE_MODERATE = 1;
+	public static final int PLACEHOLDER_MATCH_MODE_LENIENT = 2;
+
+	private List<SignaturePlaceholderData> placeholders = new Vector<SignaturePlaceholderData>();
+	private int currentPage = 0;
+
+	private SignaturePlaceholderExtractor(String placeholderId,
+			int placeholderMatchMode) throws IOException {
+		super(ResourceLoader.loadProperties(
+				"placeholder/pdfbox-reader.properties", true));
+	}
+
+	/**
+	 * Search the document for placeholder images and possibly included
+	 * additional info.<br/>
+	 * Searches only for the first placeholder page after page from top.
+	 *
+	 * @param inputStream
+	 * @return all available info from the first found placeholder.
+	 * @throws PDFDocumentException
+	 *             if the document could not be read.
+	 * @throws PlaceholderExtractionException
+	 *             if STRICT matching mode was requested and no suitable
+	 *             placeholder could be found.
+	 */
+	public static SignaturePlaceholderData extract(PDDocument doc,
+			String placeholderId, int matchMode) throws PdfAsException {
+		SignaturePlaceholderContext.setSignaturePlaceholderData(null);
+
+		SignaturePlaceholderExtractor extractor;
+		try {
+			extractor = new SignaturePlaceholderExtractor(placeholderId,
+					matchMode);
+		} catch (IOException e2) {
+			throw new PDFIOException("error.pdf.io.04", e2);
+		}
+		List<?> pages = doc.getDocumentCatalog().getAllPages();
+		Iterator<?> iter = pages.iterator();
+		int pageNr = 0;
+		while (iter.hasNext()) {
+			pageNr++;
+			PDPage page = (PDPage) iter.next();
+			try {
+				extractor.setCurrentPage(pageNr);
+				extractor.processStream(page, page.findResources(), page
+						.getContents().getStream());
+				SignaturePlaceholderData ret = matchPlaceholderPage(
+						extractor.placeholders, placeholderId, matchMode);
+				if (ret != null) {
+					SignaturePlaceholderContext
+							.setSignaturePlaceholderData(ret);
+					return ret;
+				}
+			} catch (IOException e1) {
+				throw new PDFIOException("error.pdf.io.04", e1);
+			}
+
+		}
+		if (extractor.placeholders.size() > 0) {
+			SignaturePlaceholderData ret = matchPlaceholderDocument(
+					extractor.placeholders, placeholderId, matchMode);
+			SignaturePlaceholderContext.setSignaturePlaceholderData(ret);
+			return ret;
+		}
+		// no placeholders found, apply strict mode if set
+		if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) {
+			throw new PlaceholderExtractionException("error.pdf.stamp.09");
+		}
+
+		return null;
+	}
+
+	private static SignaturePlaceholderData matchPlaceholderDocument(
+			List<SignaturePlaceholderData> placeholders, String placeholderId,
+			int matchMode) throws PlaceholderExtractionException {
+
+		if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT)
+			throw new PlaceholderExtractionException("error.pdf.stamp.09");
+
+		if (placeholders.size() == 0)
+			return null;
+
+		for (int i = 0; i < placeholders.size(); i++) {
+			SignaturePlaceholderData spd = placeholders.get(i);
+			if (spd.getId() == null)
+				return spd;
+		}
+
+		if (matchMode == PLACEHOLDER_MATCH_MODE_LENIENT)
+			return placeholders.get(0);
+
+		return null;
+	}
+
+	private static SignaturePlaceholderData matchPlaceholderPage(
+			List<SignaturePlaceholderData> placeholders, String placeholderId,
+			int matchMode) {
+		if (placeholders.size() == 0)
+			return null;
+		for (int i = 0; i < placeholders.size(); i++) {
+			SignaturePlaceholderData data = placeholders.get(i);
+			if (placeholderId != null && placeholderId.equals(data.getId()))
+				return data;
+			if (placeholderId == null && data.getId() == null)
+				return data;
+		}
+		return null;
+	}
+
+	private void setCurrentPage(int pageNr) {
+		this.currentPage = pageNr;
+	}
+
+	@Override
+	protected void processOperator(PDFOperator operator, List<COSBase> arguments)
+			throws IOException {
+		String operation = operator.getOperation();
+		if (operation.equals("Do")) {
+			COSName objectName = (COSName) arguments.get(0);
+			Map<?, ?> xobjects = getResources().getXObjects();
+			PDXObject xobject = (PDXObject) xobjects.get(objectName.getName());
+			if (xobject instanceof PDXObjectImage) {
+				try {
+					PDXObjectImage image = (PDXObjectImage) xobject;
+					SignaturePlaceholderData data = checkImage(image);
+					if (data != null) {
+						PDPage page = getCurrentPage();
+						Matrix ctm = getGraphicsState()
+								.getCurrentTransformationMatrix();
+						double rotationInRadians = (page.findRotation() * Math.PI) / 180;
+
+						AffineTransform rotation = new AffineTransform();
+						rotation.setToRotation(rotationInRadians);
+						AffineTransform rotationInverse = rotation
+								.createInverse();
+						Matrix rotationInverseMatrix = new Matrix();
+						rotationInverseMatrix
+								.setFromAffineTransform(rotationInverse);
+						Matrix rotationMatrix = new Matrix();
+						rotationMatrix.setFromAffineTransform(rotation);
+
+						Matrix unrotatedCTM = ctm
+								.multiply(rotationInverseMatrix);
+
+						float x = unrotatedCTM.getXPosition();
+						float y = unrotatedCTM.getYPosition()
+								+ unrotatedCTM.getYScale();
+						float w = unrotatedCTM.getXScale();
+
+						String posString = "p:" + currentPage + ";x:" + x
+								+ ";y:" + y + ";w:" + w;
+						try {
+							data.setTablePos(new TablePos(posString));
+							data.setPlaceholderName(objectName.getName());
+							placeholders.add(data);
+						} catch (PdfAsException e) {
+							throw new WrappedIOException(e);
+						}
+					}
+				} catch (NoninvertibleTransformException e) {
+					throw new WrappedIOException(e);
+				}
+			}
+		} else {
+			super.processOperator(operator, arguments);
+		}
+	}
+
+	/**
+	 * Checks an image if it is a placeholder for a signature.
+	 *
+	 * @param image
+	 * @return
+	 * @throws IOException
+	 */
+	private SignaturePlaceholderData checkImage(PDXObjectImage image)
+			throws IOException {
+		BufferedImage bimg = image.getRGBImage();
+		if (bimg == null) {
+			String type = image.getSuffix();
+			if (type != null) {
+				type = type.toUpperCase() + " images";
+			} else {
+				type = "Image type";
+			}
+			log.info("Unable to extract image for QRCode analysis. "
+					+ type
+					+ " not supported. Add additional JAI Image filters to your classpath. Refer to https://jai.dev.java.net. Skipping image.");
+			return null;
+		}
+		if (bimg.getHeight() < 10 || bimg.getWidth() < 10) {
+			log.debug("Image too small for QRCode. Skipping image.");
+			return null;
+		}
+
+		LuminanceSource source = new BufferedImageLuminanceSource(bimg);
+		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
+		Result result;
+		long before = System.currentTimeMillis();
+		try {
+			Hashtable<DecodeHintType, Vector<BarcodeFormat>> hints = new Hashtable<DecodeHintType, Vector<BarcodeFormat>>();
+			Vector<BarcodeFormat> formats = new Vector<BarcodeFormat>();
+			formats.add(BarcodeFormat.QR_CODE);
+			hints.put(DecodeHintType.POSSIBLE_FORMATS, formats);
+			result = new MultiFormatReader().decode(bitmap, hints);
+
+			String text = result.getText();
+			String profile = null;
+			String type = null;
+			String sigKey = null;
+			String id = null;
+			if (text != null) {
+				if (text.startsWith(QR_PLACEHOLDER_IDENTIFIER)) {
+					String[] data = text.split(";");
+					if (data.length > 1) {
+						for (int i = 1; i < data.length; i++) {
+							String kvPair = data[i];
+							String[] kv = kvPair.split("=");
+							if (kv.length != 2) {
+								log.debug("Invalid parameter in placeholder data: "
+										+ kvPair);
+							} else {
+								if (kv[0]
+										.equalsIgnoreCase(SignaturePlaceholderData.ID_KEY)) {
+									id = kv[1];
+								} else if (kv[0]
+										.equalsIgnoreCase(SignaturePlaceholderData.PROFILE_KEY)) {
+									profile = kv[1];
+								} else if (kv[0]
+										.equalsIgnoreCase(SignaturePlaceholderData.SIG_KEY_KEY)) {
+									sigKey = kv[1];
+								} else if (kv[0]
+										.equalsIgnoreCase(SignaturePlaceholderData.TYPE_KEY)) {
+									type = kv[1];
+								}
+							}
+						}
+					}
+					return new SignaturePlaceholderData(profile, type, sigKey,
+							id);
+				} else {
+					log.warn("QR-Code found but does not start with \""
+							+ QR_PLACEHOLDER_IDENTIFIER
+							+ "\". Ignoring QR placeholder.");
+				}
+			}
+		} catch (ReaderException re) {
+			if (log.isDebugEnabled()) {
+				log.debug("Could not decode - not a placeholder. needed: "
+						+ (System.currentTimeMillis() - before));
+			}
+			if (!(re instanceof NotFoundException)) {
+				if (log.isInfoEnabled()) {
+					log.info("Failed to decode image", re);
+				}
+			}
+		} catch (ArrayIndexOutOfBoundsException e) {
+			if (log.isInfoEnabled()) {
+				log.info("Failed to decode image. Probably a zxing bug", e);
+			}
+		}
+		return null;
+	}
+
+}
diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/positioning/Positioning.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/positioning/Positioning.java
new file mode 100644
index 00000000..4efa2148
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/positioning/Positioning.java
@@ -0,0 +1,237 @@
+/*******************************************************************************
+ * <copyright> Copyright 2014 by E-Government Innovation Center EGIZ, Graz, Austria </copyright>
+ * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
+ * joint initiative of the Federal Chancellery Austria and Graz University of
+ * Technology.
+ * 
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ * 
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ ******************************************************************************/
+package at.gv.egiz.pdfas.lib.impl.pdfbox.positioning;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.common.PDRectangle;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.lib.impl.pdfbox.utils.PdfBoxUtils;
+import at.gv.egiz.pdfas.lib.impl.stamping.IPDFVisualObject;
+import at.knowcenter.wag.egov.egiz.pdf.PDFUtilities;
+import at.knowcenter.wag.egov.egiz.pdf.PositioningInstruction;
+import at.knowcenter.wag.egov.egiz.pdf.TablePos;
+
+/**
+ * Created with IntelliJ IDEA. User: afitzek Date: 8/29/13 Time: 4:30 PM To
+ * change this template use File | Settings | File Templates.
+ */
+public class Positioning {
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(Positioning.class);
+	
+	/**
+	 * The left/right margin.
+	 */
+	public static final float SIGNATURE_MARGIN_HORIZONTAL = 50f;
+
+	/**
+	 * The top/bottom margin.
+	 */
+	public static final float SIGNATURE_MARGIN_VERTICAL = 20f;
+
+	/**
+	 * Evalutates absolute positioning and prepares the PositioningInstruction
+	 * for placing the table.
+	 *
+	 * @param pos
+	 *            The absolute positioning parameter. If null it is sought in
+	 *            the profile definition.
+	 * @param signature_type
+	 *            The profile definition of the table to be written.
+	 * @param pdfDataSource
+	 *            The pdf.
+	 * @param pdf_table
+	 *            The pdf table to be written.
+	 * @return Returns the PositioningInformation.
+	 * @throws PdfAsException
+	 *             F.e.
+	 */
+	public static PositioningInstruction determineTablePositioning(
+			TablePos pos, String signature_type, PDDocument pdfDataSource,
+			IPDFVisualObject pdf_table, boolean legacy32) throws PdfAsException {
+		return adjustSignatureTableandCalculatePosition(pdfDataSource,
+				pdf_table, pos, legacy32);
+	}
+
+	/**
+	 * Sets the width of the table according to the layout of the document and
+	 * calculates the y position where the PDFPTable should be placed.
+	 *
+	 * @param pdfDataSource
+	 *            The PDF document.
+	 * @param pdf_table
+	 *            The PDFPTable to be placed.
+	 * @return Returns the position where the PDFPTable should be placed.
+	 * @throws PdfAsException
+	 *             F.e.
+	 */
+	public static PositioningInstruction adjustSignatureTableandCalculatePosition(
+			final PDDocument pdfDataSource, IPDFVisualObject pdf_table,
+			TablePos pos, boolean legacy32) throws PdfAsException {
+		
+		PdfBoxUtils.checkPDFPermissions(pdfDataSource);
+		// get pages of currentdocument
+
+		int doc_pages = pdfDataSource.getNumberOfPages();
+		int page = doc_pages;
+		boolean make_new_page = pos.isNewPage();
+		if (!(pos.isNewPage() || pos.isPauto())) {
+			// we should posit signaturtable on this page
+
+			page = pos.getPage();
+			// System.out.println("XXXXPAGE="+page+" doc_pages="+doc_pages);
+			if (page > doc_pages) {
+				make_new_page = true;
+				page = doc_pages;
+				// throw new PDFDocumentException(227, "Page number is to big(="
+				// + page+
+				// ") cannot be parsed.");
+			}
+		}
+		
+		PDPage pdPage = (PDPage) pdfDataSource.getDocumentCatalog()
+				.getAllPages().get(page - 1);
+		PDRectangle cropBox = pdPage.getCropBox();
+
+		// fallback to MediaBox if Cropbox not available!
+		
+		if (cropBox == null) {
+			cropBox = pdPage.findCropBox();
+		}
+
+		if (cropBox == null) {
+			cropBox = pdPage.findMediaBox();
+		}
+
+		// getPagedimensions
+		// Rectangle psize = reader.getPageSizeWithRotation(page);
+		// int page_rotation = reader.getPageRotation(page);
+
+		// Integer rotation = pdPage.getRotation();
+		// int page_rotation = rotation.intValue();
+
+		float page_width = cropBox.getWidth();
+		float page_height = cropBox.getHeight();
+
+		// now we can calculate x-position
+		float pre_pos_x = SIGNATURE_MARGIN_HORIZONTAL;
+		if (!pos.isXauto()) {
+			// we do have absolute x
+			pre_pos_x = pos.getPosX();
+		}
+		// calculate width
+		// center
+		float pre_width = page_width - 2 * pre_pos_x;
+		if (!pos.isWauto()) {
+			// we do have absolute width
+			pre_width = pos.getWidth();
+			if (pos.isXauto()) { // center x
+				pre_pos_x = (page_width - pre_width) / 2;
+			}
+		}
+		final float pos_x = pre_pos_x;
+		final float width = pre_width;
+		// Signatur table dimensions are complete
+		pdf_table.setWidth(width);
+		pdf_table.fixWidth();
+		// pdf_table.setTotalWidth(width);
+		// pdf_table.setLockedWidth(true);
+
+		final float table_height = pdf_table.getHeight();
+		// now check pos_y
+		float pos_y = pos.getPosY();
+
+		// in case an absolute y position is already given OR
+		// if the table is related to an invisible signature
+		// there is no need for further calculations
+		// (fixed adding new page in case of invisible signatures)
+		if (!pos.isYauto() || table_height == 0) {
+			// we do have y-position too --> all parameters but page ok
+			if (make_new_page) {
+				page++;
+			}
+			return new PositioningInstruction(make_new_page, page, pos_x,
+					pos_y, pos.rotation);
+		}
+		// pos_y is auto
+		if (make_new_page) {
+			// ignore footer in new page
+			page++;
+			pos_y = page_height - SIGNATURE_MARGIN_VERTICAL;
+			return new PositioningInstruction(make_new_page, page, pos_x,
+					pos_y, pos.rotation);
+		}
+		// up to here no checks have to be made if Tablesize and Pagesize are
+		// fit
+		// Now we have to getfreespace in page and reguard footerline
+		float footer_line = pos.getFooterLine();
+		
+		float pre_page_length = PDFUtilities.calculatePageLength(pdfDataSource,
+				page - 1, page_height - footer_line, /* page_rotation, */
+				legacy32);
+		
+		if (pre_page_length == Float.NEGATIVE_INFINITY) {
+			// we do have an empty page or nothing in area above footerline
+			pre_page_length = page_height;
+			// no text --> SIGNATURE_BORDER
+			pos_y = page_height - SIGNATURE_MARGIN_VERTICAL;
+			if (pos_y - footer_line <= table_height) {
+				make_new_page = true;
+				if (!pos.isPauto()) {
+					// we have to correct pagenumber
+					page = pdfDataSource.getNumberOfPages();
+				}
+				page++;
+				// no text --> SIGNATURE_BORDER
+				pos_y = page_height - SIGNATURE_MARGIN_VERTICAL;
+			}
+			return new PositioningInstruction(make_new_page, page, pos_x,
+					pos_y, pos.rotation);
+		}
+		final float page_length = pre_page_length;
+		// we do have text take SIGNATURE_MARGIN
+		pos_y = page_height - page_length - SIGNATURE_MARGIN_VERTICAL;
+		if (pos_y - footer_line <= table_height) {
+			make_new_page = true;
+			if (!pos.isPauto()) {
+				// we have to correct pagenumber in case of absolute page and
+				// not enough
+				// space
+				page = pdfDataSource.getNumberOfPages();
+			}
+			page++;
+			// no text --> SIGNATURE_BORDER
+			pos_y = page_height - SIGNATURE_MARGIN_VERTICAL;
+		}
+		return new PositioningInstruction(make_new_page, page, pos_x, pos_y,
+				pos.rotation);
+
+	}
+
+}
diff --git a/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/utils/PdfBoxUtils.java b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/utils/PdfBoxUtils.java
new file mode 100644
index 00000000..01501f97
--- /dev/null
+++ b/pdf-as-pdfbox/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox/utils/PdfBoxUtils.java
@@ -0,0 +1,73 @@
+package at.gv.egiz.pdfas.lib.impl.pdfbox.utils;
+
+import org.apache.pdfbox.cos.COSArray;
+import org.apache.pdfbox.cos.COSDictionary;
+import org.apache.pdfbox.cos.COSName;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.encryption.AccessPermission;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsValidationException;
+
+public class PdfBoxUtils {
+	private static final Logger logger = LoggerFactory
+			.getLogger(PdfBoxUtils.class);
+	
+	public static void checkPDFPermissions(PDDocument doc)
+			throws PdfAsValidationException {
+
+		AccessPermission accessPermission = doc.getCurrentAccessPermission();
+		if (doc.isEncrypted()) {
+			throw new PdfAsValidationException("error.pdf.sig.12", null);
+		}
+
+		if (!accessPermission.isOwnerPermission()) {
+			throw new PdfAsValidationException("error.pdf.sig.12", null);
+		}
+
+	}
+
+	public static int countSignatures(PDDocument doc, String sigName) {
+		int count = 0;
+		COSDictionary trailer = doc.getDocument().getTrailer();
+		COSDictionary root = (COSDictionary) trailer
+				.getDictionaryObject(COSName.ROOT);
+		COSDictionary acroForm = (COSDictionary) root
+				.getDictionaryObject(COSName.ACRO_FORM);
+		COSArray fields = (COSArray) acroForm
+				.getDictionaryObject(COSName.FIELDS);
+		for (int i = 0; i < fields.size(); i++) {
+			COSDictionary field = (COSDictionary) fields.getObject(i);
+			String type = field.getNameAsString("FT");
+			if ("Sig".equals(type)) {
+				String name = field.getString(COSName.T);
+				if (name != null) {
+					logger.debug("Found Sig: " + name);
+					try {
+						if (name.startsWith(sigName)) {
+							String numberString = name.replace(sigName, "");
+
+							logger.debug("Found Number: " + numberString);
+
+							int SigIDX = Integer.parseInt(numberString);
+							if (SigIDX > count) {
+								count = SigIDX;
+							}
+						}
+					} catch (Throwable e) {
+						logger.info("Found a different Signature, we do not need to count this.");
+					}
+				}
+			}
+
+		}
+
+		count++;
+
+		logger.debug("Returning sig number: " + count);
+
+		return count;
+	}
+
+}