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-rw-r--r--pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/signing/pdfbox2/PADESPDFBOXSigner.java63
1 files changed, 55 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 6345a714..a33517cb 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
@@ -64,6 +64,7 @@ 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.COSObjectable;
import org.apache.pdfbox.pdmodel.common.PDMetadata;
import org.apache.pdfbox.pdmodel.common.PDNumberTreeNode;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
@@ -96,7 +97,10 @@ import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Calendar;
+import java.util.Collections;
+import java.util.LinkedHashMap;
import java.util.List;
+import java.util.Map;
public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
@@ -213,7 +217,8 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
}
SignatureProfileSettings signatureProfileSettings = TableFactory
.createProfile(requestedSignature.getSignatureProfileID(), pdfObject.getStatus().getSettings());
- //Check if input document is PDF-A conform
+
+ //Check if input document is PDF-A conform
if (signatureProfileSettings.isPDFA()) {
DataSource origDoc = pdfObject.getOriginalDocument();
InputStream stream = origDoc.getInputStream();
@@ -510,12 +515,13 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
}
}
-
+
PDStructureElement sigBlock = new PDStructureElement("Form", docElement);
// create object dictionary and add as child element
COSDictionary objectDic = new COSDictionary();
objectDic.setName("Type", "OBJR");
+
objectDic.setItem("Pg", signatureField.getWidget().getPage());
objectDic.setItem("Obj", signatureField.getWidget());
@@ -541,7 +547,6 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
// Modify number tree
PDNumberTreeNode ntn = structureTreeRoot.getParentTree();
- int parentTreeNextKey = structureTreeRoot.getParentTreeNextKey();
if (ntn == null) {
ntn = new PDNumberTreeNode(objectDic, null);
logger.info("No number-tree-node found!");
@@ -549,9 +554,10 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
COSArray ntnKids = (COSArray) ntn.getCOSObject().getDictionaryObject(COSName.KIDS);
COSArray ntnNumbers = (COSArray) ntn.getCOSObject().getDictionaryObject(COSName.NUMS);
-
- if(ntnNumbers == null && ntnKids != null){//no number array, so continue with the kids array
-
+
+ int parentTreeNextKey = getParentTreeNextKey(structureTreeRoot);
+
+ if(ntnNumbers == null && ntnKids != null){//no number array, so continue with the kids array
//create dictionary with limits and nums array
COSDictionary pTreeEntry = new COSDictionary();
COSArray limitsArray = new COSArray();
@@ -630,7 +636,7 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
byte[] outputDocument = bos.toByteArray();
pdfObject.setSignedDocument(outputDocument);
}
- /* Check if resulting pdf is PDF-A conform */
+ /* Check if resulting pdf is PDF-A conform */
if (signatureProfileSettings.isPDFA()) {
runPDFAPreflight(new ByteArrayDataSource(pdfObject.getSignedDocument()));
}
@@ -665,7 +671,23 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
}
}
- /**
+ private int getParentTreeNextKey(PDStructureTreeRoot structureTreeRoot) throws IOException {
+ int nextKey = structureTreeRoot.getParentTreeNextKey();
+ if (nextKey < 0) {
+ Map<Integer, COSObjectable> destNumberTreeAsMap = getNumberTreeAsMap(structureTreeRoot.getParentTree());
+ if (destNumberTreeAsMap.isEmpty()) {
+ nextKey = 0;
+
+ } else {
+ nextKey = Collections.max(destNumberTreeAsMap.keySet()) + 1;
+
+ }
+ }
+
+ return nextKey;
+ }
+
+ /**
* Check via PreFlightParser if PDF-Document is a valid PDFA1
* @param signedDocument: signed Document
* @throws PdfAsException
@@ -950,4 +972,29 @@ public class PADESPDFBOXSigner implements IPdfSigner, IConfigurationConstants {
}
return result;
}
+
+ static Map<Integer, COSObjectable> getNumberTreeAsMap(PDNumberTreeNode tree)
+ throws IOException
+ {
+ Map<Integer, COSObjectable> numbers = tree.getNumbers();
+ if (numbers == null)
+ {
+ numbers = new LinkedHashMap<>();
+ }
+ else
+ {
+ // must copy because the map is read only
+ numbers = new LinkedHashMap<>(numbers);
+ }
+ List<PDNumberTreeNode> kids = tree.getKids();
+ if (kids != null)
+ {
+ for (PDNumberTreeNode kid : kids)
+ {
+ numbers.putAll(getNumberTreeAsMap(kid));
+ }
+ }
+ return numbers;
+ }
+
} \ No newline at end of file