Support for QR Placeholders in PAdES

16 files changed, 722 insertions, 12 deletions

diff --git a/pdf-as-lib/bin/placeholder/empty.jpg b/pdf-as-lib/bin/placeholder/empty.jpg
new file mode 100644
index 00000000..7913177d
--- /dev/null
+++ b/pdf-as-lib/bin/placeholder/empty.jpg
diff --git a/pdf-as-lib/bin/placeholder/pdfbox-reader.properties b/pdf-as-lib/bin/placeholder/pdfbox-reader.properties
new file mode 100644
index 00000000..a3decc96
--- /dev/null
+++ b/pdf-as-lib/bin/placeholder/pdfbox-reader.properties
@@ -0,0 +1,23 @@
+BT = org.apache.pdfbox.util.operator.BeginText

+cm = org.apache.pdfbox.util.operator.Concatenate

+Do = org.apache.pdfbox.util.operator.Invoke

+ET = org.apache.pdfbox.util.operator.EndText

+gs = org.apache.pdfbox.util.operator.SetGraphicsStateParameters

+q  = org.apache.pdfbox.util.operator.GSave

+Q  = org.apache.pdfbox.util.operator.GRestore

+T* = org.apache.pdfbox.util.operator.NextLine

+Tc = org.apache.pdfbox.util.operator.SetCharSpacing

+Td = org.apache.pdfbox.util.operator.MoveText

+TD = org.apache.pdfbox.util.operator.MoveTextSetLeading

+Tf = org.apache.pdfbox.util.operator.SetTextFont

+Tj = org.apache.pdfbox.util.operator.ShowText

+TJ = org.apache.pdfbox.util.operator.ShowTextGlyph

+TL = org.apache.pdfbox.util.operator.SetTextLeading

+Tm = org.apache.pdfbox.util.operator.SetMatrix

+Tr = org.apache.pdfbox.util.operator.SetTextRenderingMode

+Ts = org.apache.pdfbox.util.operator.SetTextRise

+Tw = org.apache.pdfbox.util.operator.SetWordSpacing

+Tz = org.apache.pdfbox.util.operator.SetHorizontalTextScaling

+w  = org.apache.pdfbox.util.operator.SetLineWidth

+\' = org.apache.pdfbox.util.operator.MoveAndShow

+\" = org.apache.pdfbox.util.operator.SetMoveAndShow
\ No newline at end of file
diff --git a/pdf-as-lib/build.gradle b/pdf-as-lib/build.gradle
index 68d65d99..683df99c 100644
--- a/pdf-as-lib/build.gradle
+++ b/pdf-as-lib/build.gradle
@@ -67,6 +67,8 @@ dependencies {
 	compile group: 'eu.europa.ec.joinup.egovlabs.pdf-as.iaik', name: 'iaik_ecc_eval_signed', version: '2.19'
 	compile group: 'log4j', name: 'log4j', version: '1.2.17'
 	compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.5'
+	compile group: 'com.google.zxing', name: 'core', version: '2.2'
+	compile group: 'com.google.zxing', name: 'javase', version: '2.2'
 	//compile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.7.5'
     testCompile group: 'junit', name: 'junit', version: '4.+'
 	/*generateJavaFromWsdlDeps('org.apache.axis:axis:1.4')
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/PdfAsFactory.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/PdfAsFactory.java
index 10391ecc..e26e3fdb 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/PdfAsFactory.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/api/PdfAsFactory.java
@@ -14,8 +14,8 @@ import at.gv.egiz.pdfas.lib.impl.VerifyParameterImpl;
 public class PdfAsFactory {
 	
 	static {
-		//PropertyConfigurator.configure(ClassLoader.getSystemResourceAsStream("resources/log4j.properties"));
-		BasicConfigurator.configure();
+		PropertyConfigurator.configure(ClassLoader.getSystemResourceAsStream("resources/log4j.properties"));
+		//BasicConfigurator.configure();
 	}
 	
 	public static PdfAs createPdfAs(File configuration) {
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
index 4a8e41c3..2f2d47c8 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/PdfAsImpl.java
@@ -3,6 +3,7 @@ package at.gv.egiz.pdfas.lib.impl;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.ArrayList;
@@ -35,6 +36,8 @@ import at.gv.egiz.pdfas.lib.api.verify.VerifyResult;
 import at.gv.egiz.pdfas.lib.impl.configuration.ConfigurationImpl;
 import at.gv.egiz.pdfas.lib.impl.configuration.PlaceholderConfiguration;
 import at.gv.egiz.pdfas.lib.impl.configuration.SignatureProfileConfiguration;
+import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderData;
+import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderExtractor;
 import at.gv.egiz.pdfas.lib.impl.positioning.Positioning;
 import at.gv.egiz.pdfas.lib.impl.signing.IPdfSigner;
 import at.gv.egiz.pdfas.lib.impl.signing.PdfSignerFactory;
@@ -105,13 +108,12 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
 			status.getPdfObject().setOriginalDocument(
 					parameter.getDataSource().getByteData());
 
-			// Placeholder search?
-			if (placeholderConfiguration.isGlobalPlaceholderEnabled()) {
-				// TODO: Do placeholder search
-			}
-
 			this.stampPdf(status);
 
+			FileOutputStream fos = new FileOutputStream("/home/afitzek/qr_2_stamped.pdf");
+			fos.write(status.getPdfObject().getStampedDocument());
+			fos.close();
+			
 			/*
 			 * if (requestedSignature.isVisual()) {
 			 * logger.info("Creating visual siganture block"); //
@@ -259,7 +261,7 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
 					if (verifyFilter != null) {
 						List<VerifyResult> results = verifyFilter.verify(
 								contentData.toByteArray(), content.getBytes());
-						if(results != null && !results.isEmpty()) {
+						if (results != null && !results.isEmpty()) {
 							result.addAll(results);
 						}
 					}
@@ -421,6 +423,72 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
 		}
 	}
 
+	private boolean checkPlaceholderSignature(OperationStatus status)
+			throws PdfAsException, IOException {
+		if (status.getPlaceholderConfiguration().isGlobalPlaceholderEnabled()) {
+			SignaturePlaceholderData signaturePlaceholderData = SignaturePlaceholderExtractor
+					.extract(new ByteArrayInputStream(status.getPdfObject()
+							.getOriginalDocument()), null, 1);
+
+			if (signaturePlaceholderData != null) {
+				RequestedSignature requestedSignature = status
+						.getRequestedSignature();
+
+				if (signaturePlaceholderData.getProfile() != null) {
+					requestedSignature
+							.setSignatureProfileID(signaturePlaceholderData
+									.getProfile());
+				}
+
+				String signatureProfileID = requestedSignature
+						.getSignatureProfileID();
+
+				TablePos tablePos = signaturePlaceholderData.getTablePos();
+
+				SignatureProfileSettings signatureProfileSettings = TableFactory
+						.createProfile(signatureProfileID, settings);
+
+				Table main = TableFactory.createSigTable(
+						signatureProfileSettings, MAIN, settings,
+						requestedSignature);
+
+				IPDFStamper stamper = StamperFactory
+						.createDefaultStamper(settings);
+				IPDFVisualObject visualObject = stamper.createVisualPDFObject(
+						status.getPdfObject(), main);
+				
+				PDDocument originalDocument = PDDocument
+						.load(new ByteArrayInputStream(status.getPdfObject()
+								.getOriginalDocument()));
+
+				PositioningInstruction positioningInstruction = Positioning
+						.determineTablePositioning(tablePos, "", originalDocument,
+								visualObject);
+
+				// ================================================================
+				// StampingStage (visual) -> stamp logical signature block to
+				// location (itext)
+
+				byte[] incrementalUpdate = stamper.writeVisualObject(visualObject,
+						positioningInstruction, status.getPdfObject()
+								.getOriginalDocument(), signaturePlaceholderData.getPlaceholderName());
+
+				SignaturePositionImpl position = new SignaturePositionImpl();
+				position.setX(positioningInstruction.getX());
+				position.setY(positioningInstruction.getY());
+				position.setPage(positioningInstruction.getPage());
+				position.setHeight(visualObject.getHeight());
+				position.setWidth(visualObject.getWidth());
+
+				requestedSignature.setSignaturePosition(position);
+
+				status.getPdfObject().setStampedDocument(incrementalUpdate);
+				return true;
+			}
+		}
+		return false;
+	}
+
 	private void stampPdf(OperationStatus status) throws PdfAsException,
 			IOException {
 
@@ -429,6 +497,11 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
 		SignatureProfileConfiguration signatureProfileConfiguration = status
 				.getSignatureProfileConfiguration(signatureProfileID);
 
+		if (checkPlaceholderSignature(status)) {
+			logger.info("Placeholder found for Signature");
+			return;
+		}
+
 		if (requestedSignature.isVisual()) {
 			logger.info("Creating visual siganture block");
 			// ================================================================
@@ -477,7 +550,7 @@ public class PdfAsImpl implements PdfAs, IConfigurationConstants {
 
 			byte[] incrementalUpdate = stamper.writeVisualObject(visualObject,
 					positioningInstruction, status.getPdfObject()
-							.getOriginalDocument());
+							.getOriginalDocument(), null);
 
 			SignaturePositionImpl position = new SignaturePositionImpl();
 			position.setX(positioningInstruction.getX());
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderContext.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderContext.java
new file mode 100644
index 00000000..28a34f6a
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderContext.java
@@ -0,0 +1,72 @@
+/**

+ * <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.placeholder;

+

+/**

+ * Store and retrieve {@link SignaturePlaceholderData} in/from a thread local context.

+ * 

+ * @author exthex

+ *

+ */

+public class SignaturePlaceholderContext {

+   

+   private ThreadLocal sigHolder = new ThreadLocal();

+   

+   private static SignaturePlaceholderContext instance = new SignaturePlaceholderContext();

+   

+   /**

+    * Constructor. Private because this is a singleton.

+    */

+   private SignaturePlaceholderContext() {

+      

+   }

+

+   /**

+    * Get the {@link SignaturePlaceholderData} which is currently bound to this thread.

+    * Might be null.

+    * 

+    * @return

+    */

+   public static SignaturePlaceholderData getSignaturePlaceholderData(){

+      return (SignaturePlaceholderData)instance.sigHolder.get();

+   }

+

+   /**

+    * 

+    * @return true if there is currently a {@link SignaturePlaceholderData} bound to this thread, false otherwise.

+    */

+   public static boolean isSignaturePlaceholderDataSet() {

+      return instance.sigHolder.get() != null;

+   }

+

+   /**

+    * Bind a {@link SignaturePlaceholderData} to this thread.

+    * If the given data is null, the context will be cleared.

+    * 

+    * @param data if null, clears the ThreadLocal, else binds the data to the current thread.

+    */

+   public static void setSignaturePlaceholderData(SignaturePlaceholderData data) {

+      instance.sigHolder.set(data);

+   }

+}

diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderData.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderData.java
new file mode 100644
index 00000000..d068104a
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderData.java
@@ -0,0 +1,152 @@
+/**

+ * <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.placeholder;

+

+import at.knowcenter.wag.egov.egiz.pdf.TablePos;

+

+/**

+ * This class represents all the data which can be extracted from a placeholder image.

+ * 

+ * @author exthex

+ *

+ */

+public class SignaturePlaceholderData {

+

+   public static final String ID_KEY = "id";

+

+   public static final String PROFILE_KEY = "profile";

+

+   public static final String TYPE_KEY = "type";

+

+   public static final String SIG_KEY_KEY = "key";

+

+   private String profile;

+

+   private String type;

+

+   private String key;

+

+   private String id;

+

+   private TablePos tablePos;

+

+   private String placeholderName;

+

+   /**

+    * 

+    * @param profile

+    * @param type

+    * @param sigKey

+    * @param id 

+    */

+   public SignaturePlaceholderData(String profile, String type, String sigKey, String id) {

+      this.profile = profile;

+      this.type = type;

+      this.key = sigKey;

+      this.id = id;

+   }

+

+   /**

+    * Get the table position for the signature block.<br/>

+    * The table position is created from the page number, the upper left corner and the width of the placeholder image.

+    * 

+    * @return

+    */

+   public TablePos getTablePos() {

+      return tablePos;

+   }

+

+   void setTablePos(TablePos tablePos) {

+      this.tablePos = tablePos;

+   }

+

+   /**

+    * The profile name. Might be null if not included in the qr-code.

+    * 

+    * @return

+    */

+   public String getProfile() {

+      return profile;

+   }

+

+   void setProfile(String profile) {

+      this.profile = profile;

+   }

+

+   /**

+    * The signature type: "textual" or "binary". Might be null if not included in the qr-code.

+    * @return

+    */

+   public String getType() {

+      return type;

+   }

+

+   void setType(String type) {

+      this.type = type;

+   }

+

+   /**

+    * The key identifier for MOA signature. Might be null if not included in the qr-code.

+    * 

+    * @return

+    */

+   public String getKey() {

+      return key;

+   }

+

+   void setKey(String key) {

+      this.key = key;

+   }

+

+   public String toString() {

+      return getClass().toString() + ": profile=" + profile + "; type=" + type + "; sigKey=" + key + "; table pos=" + tablePos;

+   }

+

+   void setPlaceholderName(String name) {

+      this.placeholderName = name;

+   }

+

+   /**

+    * The name of the placeholder image.

+    * 

+    * @return

+    */

+   public String getPlaceholderName() {

+      return placeholderName;

+   }

+

+   /**

+    * The id associated with this placeholder.

+    * 

+    * @return

+    */

+   public String getId() {

+      return id;

+   }

+

+   void setId(String id) {

+      this.id = id;

+   }

+

+}

diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderExtractor.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderExtractor.java
new file mode 100644
index 00000000..eabc27e2
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/SignaturePlaceholderExtractor.java
@@ -0,0 +1,351 @@
+/**

+ * <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.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.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.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 placeholders = new Vector();

+   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(InputStream inputStream, String placeholderId, int matchMode)

+         throws PdfAsException {

+      SignaturePlaceholderContext.setSignaturePlaceholderData(null);

+      PDDocument doc = null;

+      try

+      {

+         try {

+            doc = PDDocument.load(inputStream);

+         } catch (IOException e) {

+            throw new PDFIOException("failed to read document", e);

+         }

+         SignaturePlaceholderExtractor extractor;

+         try

+         {

+            extractor = new SignaturePlaceholderExtractor(placeholderId, matchMode);

+         } catch (IOException e2) {

+            throw new PDFIOException("failed to read document", 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("failed to read document", 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("no suitable placeholder found and STRICT matching mode requested.");

+         }

+

+         return null;

+      } finally {

+         if (doc != null)

+            try {

+               doc.close();

+            } catch (IOException e) {

+               log.debug("Could not close document.", e);

+            }

+      }

+

+   }

+

+   private static SignaturePlaceholderData matchPlaceholderDocument(

+         List placeholders, String placeholderId, int matchMode) throws PlaceholderExtractionException {

+

+      if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT)

+         throw new PlaceholderExtractionException("no suitable placeholder found and STRICT matching mode requested.");

+

+      if (placeholders.size() == 0)

+         return null;

+

+      for (int i = 0; i < placeholders.size(); i++)

+      {

+         SignaturePlaceholderData spd = (SignaturePlaceholderData)placeholders.get(i);

+         if (spd.getId() == null)

+            return spd;

+      }

+

+      if (matchMode == PLACEHOLDER_MATCH_MODE_LENIENT)

+         return (SignaturePlaceholderData)placeholders.get(0);

+

+      return null;

+   }

+

+   private static SignaturePlaceholderData matchPlaceholderPage(List placeholders,

+         String placeholderId, int matchMode) {

+      if (placeholders.size() == 0)

+         return null;

+      for (int i = 0; i < placeholders.size(); i++)

+      {

+         SignaturePlaceholderData data = (SignaturePlaceholderData)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;

+   }

+

+   protected void processOperator( PDFOperator operator, List 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 hints = new Hashtable();

+         Vector formats = new Vector();

+         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-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/package-info.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/package-info.java
new file mode 100644
index 00000000..815565da
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/placeholder/package-info.java
@@ -0,0 +1,8 @@
+/**
+ * 
+ */
+/**
+ * @author afitzek
+ *
+ */
+package at.gv.egiz.pdfas.lib.impl.placeholder;
\ No newline at end of file
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/IPDFStamper.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/IPDFStamper.java
index fce18ce7..5c84acfe 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/IPDFStamper.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/IPDFStamper.java
@@ -9,7 +9,7 @@ import at.knowcenter.wag.egov.egiz.table.Table;
 public interface IPDFStamper {
     public IPDFVisualObject createVisualPDFObject(PDFObject pdf, Table table);
     public byte[] writeVisualObject(IPDFVisualObject visualObject, PositioningInstruction positioningInstruction,
-                                    byte[] pdfData) throws PdfAsException;
+                                    byte[] pdfData, String placeholderName) throws PdfAsException;
     
     public void setSettings(ISettings settings);
 }
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/status/RequestedSignature.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/status/RequestedSignature.java
index 8bf56259..8ae8e377 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/status/RequestedSignature.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/status/RequestedSignature.java
@@ -50,6 +50,10 @@ public class RequestedSignature {
     	return this.signatureProfile;
     }
     
+    public void setSignatureProfileID(String signatureProfile) {
+    	this.signatureProfile = signatureProfile;
+    }
+    
     public X509Certificate getCertificate() {
     	return this.certificate;
     }
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/IVerifyFilter.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/IVerifyFilter.java
index 7aca582b..53c2e342 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/IVerifyFilter.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/verify/IVerifyFilter.java
@@ -3,9 +3,11 @@ package at.gv.egiz.pdfas.lib.impl.verify;
 import java.util.List;
 
 import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.lib.api.Configuration;
 import at.gv.egiz.pdfas.lib.api.verify.VerifyResult;
 
 public interface IVerifyFilter {
+	public void setConfiguration(Configuration config);
 	public List<VerifyResult> verify(byte[] contentData, byte[] signatureContent) throws PdfAsException;
 	public List<FilterEntry> getFiters();
 }
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/BKUSLConnector.java b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/BKUSLConnector.java
index 3381dca5..deecae21 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/BKUSLConnector.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/BKUSLConnector.java
@@ -130,7 +130,7 @@ public class BKUSLConnector extends BaseSLConnector {
 		try {
 			slRequest = SLMarschaller.marshalToString(of
 					.createCreateCMSSignatureRequest(request));
-			logger.trace(slRequest);
+			logger.debug(slRequest);
 
 			String slResponse = performHttpRequestToBKU(slRequest);
 
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
index 491c465a..8a7950a4 100644
--- a/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/sl/util/ISignatureConnectorSLWrapper.java
@@ -47,7 +47,7 @@ public class ISignatureConnectorSLWrapper implements ISignatureConnector {
 	}
 
 	public byte[] sign(byte[] input, int[] byteRange) throws PdfAsException {
-		CreateCMSSignatureRequestType request = connector.createCMSRequest(input, byteRange);
+		CreateCMSSignatureRequestType request = connector.createCMSRequest(input, byteRange);		
 		CreateCMSSignatureResponseType response = connector.sendCMSRequest(request);
 		
 		return response.getCMSSignature();
diff --git a/pdf-as-lib/src/main/resources/placeholder/empty.jpg b/pdf-as-lib/src/main/resources/placeholder/empty.jpg
new file mode 100644
index 00000000..7913177d
--- /dev/null
+++ b/pdf-as-lib/src/main/resources/placeholder/empty.jpg
diff --git a/pdf-as-lib/src/main/resources/placeholder/pdfbox-reader.properties b/pdf-as-lib/src/main/resources/placeholder/pdfbox-reader.properties
new file mode 100644
index 00000000..a3decc96
--- /dev/null
+++ b/pdf-as-lib/src/main/resources/placeholder/pdfbox-reader.properties
@@ -0,0 +1,23 @@
+BT = org.apache.pdfbox.util.operator.BeginText

+cm = org.apache.pdfbox.util.operator.Concatenate

+Do = org.apache.pdfbox.util.operator.Invoke

+ET = org.apache.pdfbox.util.operator.EndText

+gs = org.apache.pdfbox.util.operator.SetGraphicsStateParameters

+q  = org.apache.pdfbox.util.operator.GSave

+Q  = org.apache.pdfbox.util.operator.GRestore

+T* = org.apache.pdfbox.util.operator.NextLine

+Tc = org.apache.pdfbox.util.operator.SetCharSpacing

+Td = org.apache.pdfbox.util.operator.MoveText

+TD = org.apache.pdfbox.util.operator.MoveTextSetLeading

+Tf = org.apache.pdfbox.util.operator.SetTextFont

+Tj = org.apache.pdfbox.util.operator.ShowText

+TJ = org.apache.pdfbox.util.operator.ShowTextGlyph

+TL = org.apache.pdfbox.util.operator.SetTextLeading

+Tm = org.apache.pdfbox.util.operator.SetMatrix

+Tr = org.apache.pdfbox.util.operator.SetTextRenderingMode

+Ts = org.apache.pdfbox.util.operator.SetTextRise

+Tw = org.apache.pdfbox.util.operator.SetWordSpacing

+Tz = org.apache.pdfbox.util.operator.SetHorizontalTextScaling

+w  = org.apache.pdfbox.util.operator.SetLineWidth

+\' = org.apache.pdfbox.util.operator.MoveAndShow

+\" = org.apache.pdfbox.util.operator.SetMoveAndShow
\ No newline at end of file