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authorAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2016-11-04 13:34:02 +0100
committerAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2016-11-04 13:34:02 +0100
commit3c5857fbe6d84fd601b0be38b42bfcbfb87a1910 (patch)
tree25a380f2bd0443dc1d9eea16d638097e8e86022a /pdf-as-pdfbox-2/src/main/java/at/gv
parent9897edea00c46566f5cd077222131c3296291239 (diff)
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prepared functionality to check PDF-A1b conformity
Diffstat (limited to 'pdf-as-pdfbox-2/src/main/java/at/gv')
-rw-r--r--pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java89
1 files changed, 81 insertions, 8 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 37c8899d..8965ce0e 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
@@ -28,19 +28,14 @@ import iaik.x509.X509Certificate;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
+import java.io.*;
import java.net.URL;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
@@ -65,6 +60,12 @@ import org.apache.pdfbox.pdmodel.interactive.digitalsignature.SignatureOptions;
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.preflight.Format;
+import org.apache.pdfbox.preflight.PreflightDocument;
+import org.apache.pdfbox.preflight.ValidationResult;
+import org.apache.pdfbox.preflight.exception.SyntaxValidationException;
+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.slf4j.Logger;
@@ -105,6 +106,8 @@ import at.knowcenter.wag.egov.egiz.pdf.PositioningInstruction;
import at.knowcenter.wag.egov.egiz.pdf.TablePos;
import at.knowcenter.wag.egov.egiz.table.Table;
+import javax.activation.DataSource;
+
public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
private static final Logger logger = LoggerFactory.getLogger(PADESPDFBOXSigner.class);
@@ -176,6 +179,15 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
SignatureProfileSettings signatureProfileSettings = TableFactory
.createProfile(requestedSignature.getSignatureProfileID(), pdfObject.getStatus().getSettings());
+ /*
+ * Check if input document is PDF-A conform
+ *
+ if (signatureProfileSettings.isPDFA()) {
+ // TODO: run preflight parser
+ runPDFAPreflight(pdfObject.getOriginalDocument());
+ }
+ */
+
ValueResolver resolver = new ValueResolver(requestedSignature, pdfObject.getStatus());
String signerName = resolver.resolve("SIG_SUBJECT", signatureProfileSettings.getValue("SIG_SUBJECT"),
signatureProfileSettings);
@@ -576,7 +588,17 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
synchronized (doc) {
doc.saveIncremental(bos);
- pdfObject.setSignedDocument(bos.toByteArray());
+ byte[] outputDocument = bos.toByteArray();
+
+ /*
+ Check if resulting pdf is PDF-A conform
+ */
+ //if (signatureProfileSettings.isPDFA()) {
+ // // TODO: run preflight parser
+ // runPDFAPreflight(outputDocument);
+ //}
+
+ pdfObject.setSignedDocument(outputDocument);
}
} finally {
@@ -607,6 +629,57 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
}
}
+ private void runPDFAPreflight(final byte[] signedDocument) throws PdfAsException {
+ runPDFAPreflight(new ByteArrayDataSource(signedDocument));
+ }
+
+ private void runPDFAPreflight(final DataSource signedDocument) throws PdfAsException {
+ PreflightDocument document = null;
+ ValidationResult result = null;
+ try {
+ PreflightParser parser = new PreflightParser(signedDocument);
+ parser.parse(Format.PDF_A1B);
+ parser.parse();
+ document = parser.getPreflightDocument();
+ document.validate();
+
+ document.close();
+ result = document.getResult();
+
+ if(result.getErrorsList().size() > 0) {
+ logger.error("The following validation errors occured for PDF-A validation");
+ }
+
+ for (ValidationResult.ValidationError ve : result.getErrorsList())
+ {
+ logger.error("\t" + ve.getErrorCode() + ": " + ve.getDetails());
+ }
+
+ if(!result.isValid()) {
+ throw new PdfAsException("The file is not a valid PDF-A document");
+ }
+
+ } catch (SyntaxValidationException e) {
+ logger.error("The file is syntactically invalid.", e);
+ throw new PdfAsException("Resulting PDF Document is syntactically invalid.");
+ } catch (ValidationException e) {
+ logger.error("The file is not a valid PDF-A document.", e);
+ throw new PdfAsException("The file is not a valid PDF-A document");
+ } catch (IOException e) {
+ logger.error("An IOException (" + e.getMessage()
+ + ") occurred, while validating the PDF-A conformance", e);
+ throw new PdfAsException("Failed validating PDF Document IOException.");
+ } catch (RuntimeException e) {
+ logger.debug("An RuntimeException (" + e.getMessage()
+ + ") occurred, while validating the PDF-A conformance", e);
+ throw new PdfAsException("Failed validating PDF Document RuntimeException.");
+ } finally {
+ if (document != null) {
+ IOUtils.closeQuietly((Closeable)document);
+ }
+ }
+ }
+
@Override
public PDFObject buildPDFObject(OperationStatus operationStatus) {
return new PDFBOXObject(operationStatus);