1 files changed, 16 insertions, 4 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.");
+             }
+             
           }
         }