New (optional) configuration key introduced that supressed the Exception when incremental updates without further signatures are found.

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@742 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

2 files changed, 23 insertions, 10 deletions

diff --git a/src/main/java/at/gv/egiz/pdfas/impl/vfilter/VerificationFilterImpl.java b/src/main/java/at/gv/egiz/pdfas/impl/vfilter/VerificationFilterImpl.java
index 34b461e..c067c8f 100644
--- a/src/main/java/at/gv/egiz/pdfas/impl/vfilter/VerificationFilterImpl.java
+++ b/src/main/java/at/gv/egiz/pdfas/impl/vfilter/VerificationFilterImpl.java
@@ -57,6 +57,7 @@ public class VerificationFilterImpl implements VerificationFilter
 

 

   public static final String CHECK_DOCUMENT = "check_document";

+  public static final String SUPRESS_EXCEPTION_WHEN_LAST_UIBLOCK_IS_NO_SIGNATURE = "supress_exception_when_last_iublock_is_no_signature";

   public static final String BINARY_ONLY = "binary_only";

   public static final String ASSUME_ONLY_SIGNATURE_BLOCKS = "assume_only_signature_blocks";

   

@@ -291,6 +292,7 @@ public class VerificationFilterImpl implements VerificationFilter
       throw new VerificationFilterException(e);

     }

     String check_doc = settings.getSetting(CHECK_DOCUMENT, "false");

+    boolean supressException = "true".equalsIgnoreCase(settings.getSetting(SUPRESS_EXCEPTION_WHEN_LAST_UIBLOCK_IS_NO_SIGNATURE, "false"));

     

     // flag indicating that the last IU-block of the document is a non-signature IU-block

     boolean lastBlockWasModified = false;

@@ -381,7 +383,7 @@ public class VerificationFilterImpl implements VerificationFilter
       

       // if document checking is enabled, at least one signature has been found so far, we are dealing with a

       // non-signature IU-block

-      if((check_doc.equalsIgnoreCase("true"))&& (sigFound && !partitionContainsNewTextSignatures))  {

+      if ((check_doc.equalsIgnoreCase("true"))&& (sigFound && !partitionContainsNewTextSignatures))  {

               

         nshList.add(new NoSignatureHolder(signatureCounter));        

         lastBlockWasModified = true;

@@ -394,8 +396,12 @@ public class VerificationFilterImpl implements VerificationFilter
     }

 

     // throw an exception if the last update block does not contain a signature and signatures have been found in this document

-    if(lastBlockWasModified) {

-        throw new VerificationFilterException(ErrorCode.MODIFIED_AFTER_SIGNATION, "The document has been modified after being signed."); 

+    if (lastBlockWasModified) {

+       if (!supressException) {

+          throw new VerificationFilterException(ErrorCode.MODIFIED_AFTER_SIGNATION, "The document has been modified after being signed."); 

+       } else {

+          log.debug("The document has been modified after being signed. According to the configuration, no exception is thrown.");

+       }

     }

     

     List extractedSignatures = new ArrayList();

@@ -646,6 +652,7 @@ public class VerificationFilterImpl implements VerificationFilter
     String check_doc = settings.getSetting(CHECK_DOCUMENT, "false");

     String binary_only = settings.getSetting(BINARY_ONLY, "false");

     String assume_sigs_only = settings.getSetting(ASSUME_ONLY_SIGNATURE_BLOCKS, "false");

+    boolean supressException = "true".equalsIgnoreCase(settings.getSetting(SUPRESS_EXCEPTION_WHEN_LAST_UIBLOCK_IS_NO_SIGNATURE, "false"));

     

     try

     {

@@ -689,7 +696,12 @@ public class VerificationFilterImpl implements VerificationFilter
              assume_sigs_only.equalsIgnoreCase("false") &&

              sig_detected) {            

             

-            throw new VerificationFilterException(ErrorCode.MODIFIED_AFTER_SIGNATION, "The document has been modified after being signed.");

+             if (!supressException) {

+                throw new VerificationFilterException(ErrorCode.MODIFIED_AFTER_SIGNATION, "The document has been modified after being signed."); 

+             } else {

+                log.debug("The document has been modified after being signed. According to the configuration, no exception is thrown.");

+             }

+             

           }

         }

 

diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/framework/VerificationFilter.java b/src/main/java/at/knowcenter/wag/egov/egiz/framework/VerificationFilter.java
index b218062..5a5712e 100644
--- a/src/main/java/at/knowcenter/wag/egov/egiz/framework/VerificationFilter.java
+++ b/src/main/java/at/knowcenter/wag/egov/egiz/framework/VerificationFilter.java
@@ -17,18 +17,15 @@
  */

 package at.knowcenter.wag.egov.egiz.framework;

 

-import java.io.ByteArrayInputStream;

-import java.io.File;

-import java.io.FileInputStream;

 import java.io.IOException;

 import java.io.PrintStream;

 import java.util.ArrayList;

 import java.util.List;

 

-import at.gv.egiz.pdfas.exceptions.ErrorCode;

-

 import org.apache.log4j.Logger;

 

+import at.gv.egiz.pdfas.exceptions.ErrorCode;

+import at.gv.egiz.pdfas.impl.vfilter.VerificationFilterImpl;

 import at.knowcenter.wag.egov.egiz.PdfAS;

 import at.knowcenter.wag.egov.egiz.PdfASID;

 import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;

@@ -118,6 +115,7 @@ public class VerificationFilter
     // tzefferer: get allow_post_sign_modifications property from property file

     SettingsReader settings = SettingsReader.getInstance();

     String allow_post_sign_mods = settings.getSetting(ALLOW_POST_SIGN_MODIFICATIONS, "false");

+    boolean supressException = "true".equalsIgnoreCase(settings.getSetting(VerificationFilterImpl.SUPRESS_EXCEPTION_WHEN_LAST_UIBLOCK_IS_NO_SIGNATURE, "false"));

     

     List holders = new ArrayList();

 

@@ -252,7 +250,10 @@ public class VerificationFilter
       {

         if (signature_block_detected && !current_block_contains_signature)

         {

-          throw new PDFDocumentException(ErrorCode.MODIFIED_AFTER_SIGNATION, "Das Dokument wurde nach erfolgter Signierung verändert.");

+           if (!supressException) {

+              throw new PDFDocumentException(ErrorCode.MODIFIED_AFTER_SIGNATION, "Das Dokument wurde nach erfolgter Signierung verändert."); 

+           }

+          

         }

       }

     }