added PDF/A-3b support, and PDF/A version detection

6 files changed, 133 insertions, 25 deletions

diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java
index 8965ce0e..901e47db 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java
@@ -48,6 +48,7 @@ import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
 import org.apache.pdfbox.pdmodel.PDPage;
 import org.apache.pdfbox.pdmodel.PDResources;
+import org.apache.pdfbox.pdmodel.common.PDMetadata;
 import org.apache.pdfbox.pdmodel.common.PDNumberTreeNode;
 import org.apache.pdfbox.pdmodel.common.PDRectangle;
 import org.apache.pdfbox.pdmodel.documentinterchange.logicalstructure.PDStructureElement;
@@ -68,6 +69,9 @@ import org.apache.pdfbox.preflight.exception.ValidationException;
 import org.apache.pdfbox.preflight.parser.PreflightParser;
 import org.apache.pdfbox.rendering.ImageType;
 import org.apache.pdfbox.rendering.PDFRenderer;
+import org.apache.xmpbox.XMPMetadata;
+import org.apache.xmpbox.schema.PDFAIdentificationSchema;
+import org.apache.xmpbox.xml.DomXmpParser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -132,6 +136,8 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
 
 		PDFASPDFBOXSignatureInterface signer = (PDFASPDFBOXSignatureInterface) genericSigner;
 
+        String pdfaVersion = null;
+
 		PDDocument doc = null;
 		SignatureOptions options = new SignatureOptions();
 		COSDocument visualSignatureDocumentGuard = null;
@@ -221,6 +227,11 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
 			}
 			options.setPreferredSignatureSize(signatureSize);
 
+            if(signatureProfileSettings.isPDFA() || signatureProfileSettings.isPDFA3()) {
+                pdfaVersion = getPDFAVersion(doc);
+                signatureProfileSettings.setPDFAVersion(pdfaVersion);
+            }
+
 			// Is visible Signature
 			if (requestedSignature.isVisual()) {
 				logger.info("Creating visual siganture block");
@@ -352,7 +363,7 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
 
 				}
 
-				if (signatureProfileSettings.isPDFA()) {
+				if (signatureProfileSettings.isPDFA() || signatureProfileSettings.isPDFA3()) {
 					PDDocumentCatalog root = doc.getDocumentCatalog();
 					COSBase base = root.getCOSObject().getItem(COSName.OUTPUT_INTENTS);
 					if (base == null) {
@@ -807,4 +818,31 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
 			throw ErrorExtractor.searchPdfAsError(e, status);
 		}
 	}
+
+	private String getPDFAVersion(PDDocument doc) {
+        try {
+            PDDocumentCatalog cat = doc.getDocumentCatalog();
+            PDMetadata metadata = cat.getMetadata();
+
+            if(metadata != null) {
+                DomXmpParser xmpParser = new DomXmpParser();
+                XMPMetadata xmpMetadata = xmpParser.parse(metadata.exportXMPMetadata());
+                if(xmpMetadata != null) {
+                    PDFAIdentificationSchema pdfaIdentificationSchema = xmpMetadata.getPDFIdentificationSchema();
+                    if (pdfaIdentificationSchema != null) {
+                        Integer pdfaversion = pdfaIdentificationSchema.getPart();
+                        String conformance = pdfaIdentificationSchema.getConformance();
+                        logger.info("Detected PDF/A Version: {} - {}", pdfaversion, conformance);
+
+                        if(pdfaversion != null) {
+                            return String.valueOf(pdfaversion);
+                        }
+                    }
+                }
+            }
+        } catch (Throwable e) {
+            logger.warn("Failed to determine PDF/A Version!", e);
+        }
+        return null;
+    }
 }
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsTemplateCreator.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsTemplateCreator.java
index b8c15119..b07e6ed5 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsTemplateCreator.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsTemplateCreator.java
@@ -23,11 +23,10 @@
  ******************************************************************************/
 package at.gv.egiz.pdfas.lib.impl.stamping.pdfbox2;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
+import java.io.*;
 
+import at.gv.egiz.pdfas.common.settings.SignatureProfileSettings;
+import at.gv.egiz.pdfas.lib.impl.stamping.TableFactory;
 import org.apache.pdfbox.cos.COSName;
 import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.pdmodel.PDPage;
@@ -143,7 +142,9 @@ public class PDFAsTemplateCreator extends PDFTemplateCreator {
         		null, innerFormName, properties);
         this.pdfBuilder.createVisualSignature(template);
         this.pdfBuilder.createWidgetDictionary(pdSignatureField, holderFormResources);
-        
+
+
+
         ByteArrayInputStream in = null;
     
         	//COSDocument doc = pdfStructure.getVisualSignature();
@@ -152,7 +153,31 @@ public class PDFAsTemplateCreator extends PDFTemplateCreator {
         	ByteArrayOutputStream baos = new ByteArrayOutputStream();
         	template.save(baos);
         	baos.close();
-        	in = new ByteArrayInputStream(baos.toByteArray());
+
+        SignatureProfileSettings signatureProfileSettings =
+                this.pdfBuilder.signatureProfileSettings;
+
+        boolean requirePDFA3 = signatureProfileSettings.isPDFA3();
+
+        if(requirePDFA3) {
+
+            //FileOutputStream fos = new FileOutputStream("/tmp/signature.pdf");
+            //fos.write(baos.toByteArray());
+            //fos.close();
+
+            PDDocument cidSetRemoved = PDDocument.load(baos.toByteArray());
+            try {
+                this.pdfBuilder.removeCidSet(cidSetRemoved);
+                baos.reset();
+                baos = new ByteArrayOutputStream();
+                cidSetRemoved.save(baos);
+                baos.close();
+            } finally {
+                cidSetRemoved.close();
+            }
+        }
+
+        in = new ByteArrayInputStream(baos.toByteArray());
         
 
         logger.debug("stream returning started, size= " + in.available());
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureBuilder.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureBuilder.java
index a33a46e7..d283c3e3 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureBuilder.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureBuilder.java
@@ -30,22 +30,15 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.security.MessageDigest;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
+import at.gv.egiz.pdfas.common.settings.SignatureProfileSettings;
 import org.apache.commons.codec.binary.Hex;
 import org.apache.commons.io.IOUtils;
 import org.apache.pdfbox.cos.COSArray;
 import org.apache.pdfbox.cos.COSDictionary;
 import org.apache.pdfbox.cos.COSName;
-import org.apache.pdfbox.pdfparser.PDFParser;
-import org.apache.pdfbox.pdfparser.PDFStreamParser;
-import org.apache.pdfbox.pdmodel.PDDocument;
-import org.apache.pdfbox.pdmodel.PDPage;
-import org.apache.pdfbox.pdmodel.PDPageContentStream;
-import org.apache.pdfbox.pdmodel.PDResources;
+import org.apache.pdfbox.pdmodel.*;
 import org.apache.pdfbox.pdmodel.common.PDRectangle;
 import org.apache.pdfbox.pdmodel.common.PDStream;
 import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
@@ -59,6 +52,7 @@ import org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.PDVisibleS
 import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
 import org.apache.pdfbox.pdmodel.interactive.form.PDField;
 import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField;
+import org.apache.pdfbox.pdmodel.font.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -76,15 +70,18 @@ public class PDFAsVisualSignatureBuilder extends PDVisibleSigBuilder implements
 	private PDFAsVisualSignatureProperties properties;
 	private PDFAsVisualSignatureDesigner designer;
 	private ISettings settings;
+	public SignatureProfileSettings signatureProfileSettings;
 	private PDResources innerFormResources;
 	private Map<String, ImageObject> images = new HashMap<String, ImageObject>();
 
 	public PDFAsVisualSignatureBuilder(
 			PDFAsVisualSignatureProperties properties, ISettings settings,
-			PDFAsVisualSignatureDesigner designer) {
+			PDFAsVisualSignatureDesigner designer,
+			SignatureProfileSettings signatureProfileSettings) {
 		this.properties = properties;
 		this.settings = settings;
 		this.designer = designer;
+		this.signatureProfileSettings = signatureProfileSettings;
 	}
 
 	@Override
@@ -657,4 +654,33 @@ public class PDFAsVisualSignatureBuilder extends PDVisibleSigBuilder implements
 		this.getStructure().getTemplate().close();
 	}
 
+	public void removeCidSet(PDDocument document) throws IOException {
+
+		PDDocumentCatalog catalog = document.getDocumentCatalog();
+
+		COSName cidSet = COSName.getPDFName("CIDSet");
+
+		Iterator<PDPage> pdPageIterator = catalog.getPages().iterator();
+			while(pdPageIterator.hasNext()) {
+
+                PDPage page = pdPageIterator.next();
+
+                Iterator<COSName> cosNameIterator = page.getResources().getFontNames().iterator();
+                while (cosNameIterator.hasNext()) {
+                    COSName fontName = cosNameIterator.next();
+                    PDFont pdFont = page.getResources().getFont(fontName);
+
+                    if (pdFont instanceof PDType0Font) {
+                        PDType0Font typedFont = (PDType0Font) pdFont;
+
+                        if (typedFont.getDescendantFont() != null) {
+                            if (typedFont.getDescendantFont().getFontDescriptor() != null) {
+                                typedFont.getDescendantFont().getFontDescriptor().getCOSObject().removeItem(cidSet);
+                            }
+                        }
+                    }
+                }
+            }
+	}
+
 }
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureProperties.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureProperties.java
index db96767a..adfd6694 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureProperties.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFAsVisualSignatureProperties.java
@@ -112,7 +112,7 @@ public class PDFAsVisualSignatureProperties extends PDVisibleSigProperties {
 
 	@Override
 	public void buildSignature() throws IOException {
-		PDFAsVisualSignatureBuilder builder = new PDFAsVisualSignatureBuilder(this, this.settings, designer);
+		PDFAsVisualSignatureBuilder builder = new PDFAsVisualSignatureBuilder(this, this.settings, designer, this.signatureProfileSettings);
 		PDFAsTemplateCreator creator = new PDFAsTemplateCreator(builder);
 		try {
 			setVisibleSignature(creator.buildPDF(designer, this.origDoc));
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFBoxFont.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFBoxFont.java
index 8795907d..9c848ff9 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFBoxFont.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/PDFBoxFont.java
@@ -24,8 +24,11 @@
 package at.gv.egiz.pdfas.lib.impl.stamping.pdfbox2;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 
+import at.gv.egiz.pdfas.common.settings.SignatureProfileSettings;
+import at.gv.egiz.pdfas.lib.impl.stamping.TableFactory;
 import org.apache.pdfbox.pdmodel.font.PDFont;
 import org.apache.pdfbox.pdmodel.font.PDType0Font;
 import org.apache.pdfbox.pdmodel.font.PDType1Font;
@@ -158,6 +161,7 @@ public class PDFBoxFont {
 	private PDFont generateTTF(String fonttype, PDFBOXObject pdfObject)
 			throws IOException {
 
+
 		ttfFontDesc = fonttype;
 		String fontName = fonttype.replaceFirst("TTF:", "");
 		String fontPath = this.settings.getWorkingDirectory() + File.separator
@@ -165,6 +169,7 @@ public class PDFBoxFont {
 		
 		logger.debug("Font from: \"" + fontPath + "\".");
 
+
 		PDFAsFontCache fontCache = pdfObject.getSigBlockFontCache();
 		
 		if(fontCache.contains(fontPath)){
@@ -185,8 +190,14 @@ public class PDFBoxFont {
 //		} 
 		
 		logger.debug("Instantiating new font.");
-		
-		PDType0Font font = PDType0Font.load(pdfObject.getDocument(), new File(fontPath));
+
+/*
+		SignatureProfileSettings signatureProfileSettings = TableFactory
+				.createProfile(pdfObject.getStatus().getRequestedSignature().getSignatureProfileID(), pdfObject.getStatus().getSettings());
+
+		boolean requirePDFA3 = signatureProfileSettings.isPDFA3();
+*/
+		PDType0Font font = PDType0Font.load(pdfObject.getDocument(), new FileInputStream(fontPath));
 		fontCache.addFont(fontPath,font);
 		
 		return font;
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/TableDrawUtils.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/TableDrawUtils.java
index 5162b287..df8d3e3b 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/TableDrawUtils.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/stamping/pdfbox2/TableDrawUtils.java
@@ -230,8 +230,10 @@ public class TableDrawUtils {
 			drawDebugLineString(contentStream, tx, ty, maxWidth, textHeight, descent, settings);
 
 			contentStream.beginText();
-			
-		
+
+			contentStream.setFont(textFont, fontSize);
+			contentStream.newLineAtOffset(tx, (ty - fontSize + (descent * (-1))));
+			/*
 			if (formResources.getFont(COSName.getPDFName(textFont.getName())) != null) {
 				String fontID = getFontID(textFont, formResources);
 				logger.debug("Using Font: " + fontID);
@@ -246,11 +248,17 @@ public class TableDrawUtils {
 			contentStream.moveTextPositionByAmount(tx, (ty - fontSize + (descent * (-1))));
 
 			contentStream.appendRawCommands(fontSize + " TL\n");
-			
+			*/
+
+			if(textFont.willBeSubset()) {
+				logger.debug("Font will be subset!");
+			}
+
 			for (int k = 0; k < tlines.length; k++) {
 				contentStream.showText(tlines[k]);
 				if (k < tlines.length - 1) {
-					contentStream.appendRawCommands("T*\n");
+					contentStream.newLineAtOffset(0, -1 * fontSize );
+					//contentStream.appendRawCommands("T*\n");
 				}
 			}