pdf-as-lib maven project files moved to pdf-as-lib

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/pdf-as/trunk@926 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

1 files changed, 0 insertions, 569 deletions

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
deleted file mode 100644
index 0bab96f..0000000
--- a/src/main/java/at/knowcenter/wag/egov/egiz/framework/VerificationFilter.java
+++ /dev/null
@@ -1,569 +0,0 @@
-/**

- * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>

- * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a

- * joint initiative of the Federal Chancellery Austria and Graz University of

- * Technology.

- *

- * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by

- * the European Commission - subsequent versions of the EUPL (the "Licence");

- * You may not use this work except in compliance with the Licence.

- * You may obtain a copy of the Licence at:

- * http://www.osor.eu/eupl/

- *

- * Unless required by applicable law or agreed to in writing, software

- * distributed under the Licence is distributed on an "AS IS" basis,

- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

- * See the Licence for the specific language governing permissions and

- * limitations under the Licence.

- *

- * This product combines work with different licenses. See the "NOTICE" text

- * file for details on the various modules and licenses.

- * The "NOTICE" text file is part of the distribution. Any derivative works

- * that you distribute must include a readable copy of the "NOTICE" text file.

- *

- * $Id: VerificationFilter.java,v 1.5 2006/10/31 08:07:20 wprinz Exp $

- */

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

-

-import java.io.IOException;

-import java.io.PrintStream;

-import java.util.ArrayList;

-import java.util.List;

-

-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;

-import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;

-import at.knowcenter.wag.egov.egiz.exceptions.InvalidIDException;

-import at.knowcenter.wag.egov.egiz.exceptions.NormalizeException;

-import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;

-import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;

-import at.knowcenter.wag.egov.egiz.exceptions.SignatureException;

-import at.knowcenter.wag.egov.egiz.exceptions.SignatureTypesException;

-import at.knowcenter.wag.egov.egiz.framework.verificators.BinaryVerificator_1_0_0;

-import at.knowcenter.wag.egov.egiz.framework.verificators.TextualVerificator_1_0_0;

-import at.knowcenter.wag.egov.egiz.pdf.AbsoluteTextSignature;

-import at.knowcenter.wag.egov.egiz.pdf.BinarySignature;

-import at.knowcenter.wag.egov.egiz.pdf.Placeholder;

-import at.knowcenter.wag.egov.egiz.pdf.SignatureHolder;

-import at.knowcenter.wag.egov.egiz.pdf.StringInfo;

-import at.knowcenter.wag.egov.egiz.pdf.TextualSignatureHolder;

-import at.knowcenter.wag.exactparser.ParseDocument;

-import at.knowcenter.wag.exactparser.parsing.IndirectObjectReference;

-import at.knowcenter.wag.exactparser.parsing.PDFUtils;

-import at.knowcenter.wag.exactparser.parsing.results.ArrayParseResult;

-import at.knowcenter.wag.exactparser.parsing.results.DictionaryParseResult;

-import at.knowcenter.wag.exactparser.parsing.results.FooterParseResult;

-import at.knowcenter.wag.exactparser.parsing.results.IndirectObjectReferenceParseResult;

-import at.knowcenter.wag.exactparser.parsing.results.NumberParseResult;

-import at.knowcenter.wag.exactparser.parsing.results.ObjectParseResult;

-

-

-/**

- * This filter transforms an arbitrary input pdf into an ordered List of

- * SignatureHolders for verification.

- * 

- * <p>

- * The pdf document is parsed and the signature blocks (textual, binary, etc.)

- * are extracted as verifyable SignatureHolder objects in the order they appear

- * in the document.

- * </p>

- * 

- * @deprecated use the new at.gv.egiz.framework instead

- * 

- * @author wprinz

- * @author amavriqi

- */

-public class VerificationFilter

-{

-  public static final byte[] EGIZ_DICT_NAME = { 'E', 'G', 'I', 'Z', 'S', 'i',

-      'g', 'D', 'i', 'c', 't' };

-

-  public static final byte[] EGIZ_KZ_NAME = { 'I', 'D' };

-  

-  //tzefferer: flag for accepting post-sign modifications

-  public static final String ALLOW_POST_SIGN_MODIFICATIONS = "allow_post_sign_modifications";

-

-  /**

-   * The logger definition.

-   */

-  private static final Logger logger_ = ConfigLogger.getLogger(VerificationFilter.class);

-

-  /**

-   * Default constructor.

-   */

-  public VerificationFilter()

-  {

-    // empty block.

-  }

-

-  /**

-   * Extracts the List of SignatureHolders from the given PDF document.

-   * 

-   * @param pdf

-   *          The PDF document.

-   * @return Returns the ordered List of SignatureHolder objects (the first

-   *         signature will be at index 0) extracted from the document or an

-   *         empty list, if none could be found.

-   * @throws PresentableException

-   */

-  public List extractSignaturesFromPdf(final byte[] pdf) throws PresentableException

-  {

-	  return extractSignaturesFromPdf(pdf, false);

-  }

-  

-  //@deprecated

-  public List extractSignaturesFromPdf(final byte[] pdf, boolean ignorePostSignModificationsRestriction) throws PresentableException

-  {

-    

-    // 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();

-

-    List blocks = null;

-    try

-    {

-      blocks = ParseDocument.parseDocument(pdf);

-    }

-    catch (Exception e)

-    {

-      logger_.debug("Error while parsing Document.", e);

-      throw new PDFDocumentException(201, e);

-    }

-

-//    for (int i = 0; i < blocks.size(); i++)

-//    {

-//      FooterParseResult bpr = (FooterParseResult) blocks.get(i);

-//      // logger_.debug("block[" + i + "] from " + bpr.start_index + " to

-//      // " + bpr.next_index);

-//    }

-

-    unrollLinearization(blocks);

-    

-    boolean signature_block_detected = false;

-

-    for (int i = 0; i < blocks.size(); i++)

-    {

-      boolean current_block_contains_signature = false;

-      FooterParseResult bpr = (FooterParseResult) blocks.get(i);

-

-      int prev_end = 0;

-      if (i > 0)

-      {

-        FooterParseResult prev_bpr = (FooterParseResult) blocks.get(i - 1);

-        prev_end = prev_bpr.next_index;

-      }

-

-      // logger_.debug("block from " + prev_end + " to " +

-      // bpr.next_index);

-

-      if (containsEGIZDict(pdf, bpr))

-      {

-        logger_.debug("Parsing Binary Sig:");

-

-        PdfASID kz = extractKZFromEGIZBlock(pdf, bpr);

-

-        if (!kz.toString().equals(BinaryVerificator_1_0_0.MY_ID.toString()))

-        {

-          logger_.debug("Warning: Binary Kennzeichnung not recognized:" + kz.toString());

-        }

-

-        Verificator verificator = new BinaryVerificator_1_0_0();

-        List binary_holders = verificator.parseBlock(pdf, bpr, prev_end);

-

-        holders.addAll(binary_holders);

-        

-        // tzefferer: check if signatures have been detected in current block        

-        if(binary_holders.size() > 0)

-        {

-          signature_block_detected = true;

-          current_block_contains_signature = true;

-        }

-

-        logger_.debug(":Parsing Binary Sig END - holders.size = " + holders.size());

-      }

-      else

-      {

-    	  // TODO: make better - already deprecated

-    	  //amavriqi: skip checking for old sigs becouse of performance issues

-    	  String old_text_sigs = SettingsReader.getInstance().getSetting("check_old_textual_sigs", "false");

-    	  

-    	  //amavriqi: if old textual signatures not checked for then 

-    	  // no need to check Incremental Block 0

-    	if(old_text_sigs.equalsIgnoreCase("false") && (prev_end == 0))

-    	{

-    		continue;

-    	} 

-        logger_.debug("Extracting text for: " + prev_end + " to " + bpr.next_index);

-        

-        Verificator verificator = new TextualVerificator_1_0_0();

-        List text_holders = verificator.parseBlock(pdf, bpr, prev_end);

-        logger_.debug("text_holders = " + text_holders.size());

-

-        // tzefferer: check if signatures have been detected in current block

-        if(text_holders.size() > 0)

-        {

-          signature_block_detected = true;

-          current_block_contains_signature = true;

-        }

-        

-        // TODO: make better - already deprecated

-        //amavriqi: only if old textual signatures are checked for

-        if(old_text_sigs.equalsIgnoreCase("true")){

-        if (prev_end == 0)

-        {

-          String rest_text = null;

-          if (!text_holders.isEmpty())

-          {

-            TextualSignatureHolder first_holder = (TextualSignatureHolder) text_holders.get(0);

-            rest_text = first_holder.getSignedText();

-          }

-          else

-          {

-        	  //a.m.

-        	  logger_.debug("Incemental block" + prev_end + " and there are " + text_holders.size() + " text holders");

-        	  logger_.debug("Checking for older textual Signatures");

-        	  logger_.debug("Extracting text to " + bpr.next_index);

-            rest_text = PdfAS.extractNormalizedTextTextual(pdf, bpr.next_index); 

-          }

-

-          List old_holders = PdfAS.extractSignatureHoldersTextual(rest_text, true);

-

-          logger_.debug("Found old holders = " + old_holders.size());

-          if (!old_holders.isEmpty())

-          {

-            // there must be only one old holder.

-            holders.add(0, old_holders.get(0));

-          }

-        }

-        }

-        if (!text_holders.isEmpty())

-        {

-          List actual_text_holders = throwOutBinHolders(text_holders);

-          holders.addAll(actual_text_holders);

-        }

-

-        logger_.debug(":Extracting tex END - holders.size = " + holders.size());

-      }

-      

-      // tzefferer: check if illegal modifications have been performed on the document after performing a signation

-      if (!("true".equalsIgnoreCase(allow_post_sign_mods)) && !ignorePostSignModificationsRestriction)

-      {

-        if (signature_block_detected && !current_block_contains_signature)

-        {

-           if (!supressException) {

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

-           }

-          

-        }

-      }

-    }

-

-    for (int i = 0; i < holders.size(); i++)

-    {

-      SignatureHolder holder = (SignatureHolder) holders.get(i);

-      

-      PdfASID kz = holder.getSignatureObject().getKZ();

-      if (kz != null)

-      {

-        checkKZ(kz);

-      }

-    }

-    

-    return holders;

-  }

-  

-  /**

-   * Checks, if the given KZ is recognized by this application or logs a warning if it isn't.

-   * @param kz The Kennzeichnung.

-   */

-  protected void checkKZ (PdfASID kz)

-  {

-    if (!kz.getVendor().equals(SignatorFactory.VENDOR))

-    {

-      logger_.warn("The vendor " + kz.getVendor() + " isn't known by this application.");

-    }

-    if (!kz.getVersion().equals(SignatorFactory.VERSION_1_0_0))

-    {

-      logger_.warn("The version " + kz.getVersion() + " istn't supported by this application. This might cause problems.");

-    }

-  }

-

-  /**

-   * Throws out SignatureHolders with a binary KZ.

-   * 

-   * @param text_holders

-   *          The List of SignatureHolder objects.

-   * @return Returns the List of SignatureHolder objects, where no object has

-   *         binary KZ.

-   */

-  private List throwOutBinHolders(List text_holders)

-  {

-    List actual_text_holders = new ArrayList();

-    for (int i = 0; i < text_holders.size(); i++)

-    {

-      SignatureHolder sh = (SignatureHolder) text_holders.get(i);

-      PdfASID kz = null;

-      try

-      {

-        kz = sh.getSignatureObject().getKZ();

-      }

-      catch (InvalidIDException e)

-      {

-        logger_.error(e.getMessage(), e);

-      }

-      if (kz != null && kz.getType().equals(SignatorFactory.TYPE_BINARY))

-      {

-        logger_.info("Throwing out binary signature: " + kz);

-        continue;

-      }

-      actual_text_holders.add(sh);

-    }

-    return actual_text_holders;

-  }

-

-  /**

-   * Removes the linearization footer from the list of update blocks.

-   * 

-   * @param blocks

-   *          The list of FooterParseResult objects in \prev order.

-   */

-  protected void unrollLinearization(List blocks)

-  {

-    int linearization_index = -1;

-    for (int i = 0; i < blocks.size(); i++)

-    {

-      FooterParseResult bpr = (FooterParseResult) blocks.get(i);

-

-      if (bpr.sxpr.xref_index == 0)

-      {

-        if (linearization_index >= 0)

-        {

-          throw new RuntimeException("There is more than one linearization block! index = " + i);

-        }

-        linearization_index = i;

-      }

-    }

-

-    if (linearization_index >= 0)

-    {

-      // logger_.debug("The document is linearized - unrolling

-      // linearization block " + linearization_index);

-      blocks.remove(linearization_index);

-    }

-  }

-

-  /**

-   * Extracts the List of SignatureHolders from the given plain text document.

-   * 

-   * <p>

-   * Note that this can only extract text signatures.

-   * </p>

-   * 

-   * @param raw_text

-   *          The plain text document.

-   * @return Returns the ordered List of SignatureHolder objects (the first

-   *         signature will be at index 0) extracted from the document or an

-   *         empty list, if none could be found.

-   * @throws SignatureException

-   * @throws PDFDocumentException

-   * @throws SignatureTypesException

-   * @throws NormalizeException 

-   */

-  public List extractSignaturesFromPlainText(final String raw_text) throws PDFDocumentException, SignatureException, SignatureTypesException, NormalizeException

-  {

-    String normalized_text = PdfAS.normalizeText(raw_text);

-    

-    //List text_holders = PdfAS.extractSignatureHoldersTextual(normalized_text, false);

-    List text_holders = AbsoluteTextSignature.extractSignatureHoldersFromText(normalized_text);

-

-    String rest_text = normalized_text;

-    if (!text_holders.isEmpty())

-    {

-      TextualSignatureHolder holder = (TextualSignatureHolder) text_holders.get(0);

-      rest_text = holder.getSignedText();

-    }

-

-    List old_holders = PdfAS.extractSignatureHoldersTextual(rest_text, true);

-    if (!old_holders.isEmpty())

-    {

-      text_holders.addAll(0, old_holders);

-    }

-

-    List actual_text_holders = throwOutBinHolders(text_holders);

-    

-    return actual_text_holders;

-  }

-

-  /**

-   * Tells, if the given incremental update block contains a binary signature.

-   * 

-   * <p>

-   * According to definition, if a block is a binary block, it must/cannot

-   * contain other signatures than this one.

-   * </p>

-   * 

-   * @param block

-   *          The incremental update block.

-   * @return Returns true, if this block is a binary signature block, false

-   *         otherwise.

-   */

-  protected boolean containsEGIZDict(final byte[] pdf,

-      final FooterParseResult block)

-  {

-    int dict_index = PDFUtils.indexOfName(pdf, block.tpr.dpr.names, EGIZ_DICT_NAME);

-    if (dict_index <= 0)

-    {

-      return false;

-    }

-

-    return true;

-  }

-

-  /**

-   * Extracts the PDF AS ID of the egiz block.

-   * 

-   * @param pdf

-   *          The pdf.

-   * @param block

-   *          The IU block.

-   * @return Returns the extracted PDF AS ID.

-   * @throws PDFDocumentException

-   *           Forwarded exception.

-   * @throws InvalidIDException

-   *           Forwarded exception.

-   */

-  protected PdfASID extractKZFromEGIZBlock(final byte[] pdf,

-      final FooterParseResult block) throws PDFDocumentException, InvalidIDException

-  {

-    int egiz_index = PDFUtils.indexOfName(pdf, block.tpr.dpr.names, VerificationFilter.EGIZ_DICT_NAME);

-    if (egiz_index < 0)

-    {

-      throw new PDFDocumentException(301, "egiz_index = " + egiz_index);

-    }

-

-    IndirectObjectReferenceParseResult egiz_dict_iorpr = (IndirectObjectReferenceParseResult) block.tpr.dpr.values.get(egiz_index);

-    // logger_.debug("egiz_dict_ir = " + egiz_dict_iorpr.ior.object_number

-    // + " " + egiz_dict_iorpr.ior.generation_number);

-

-    IndirectObjectReference ior = egiz_dict_iorpr.ior;

-

-    final int egiz_dict_offset = PDFUtils.getObjectOffsetFromXRefByIndirectObjectReference(block.xpr, ior);

-    // logger_.debug("egiz_dict_offset = " + egiz_dict_offset);

-

-    ObjectParseResult obj = PDFUtils.parseObject(pdf, egiz_dict_offset);

-    DictionaryParseResult egiz_dict = (DictionaryParseResult) obj.object;

-

-    int kz_index = PDFUtils.indexOfName(pdf, egiz_dict.names, EGIZ_KZ_NAME);

-    if (kz_index < 0)

-    {

-      throw new PDFDocumentException(301, "kz_index = " + kz_index);

-    }

-    ArrayParseResult kz_apr = (ArrayParseResult) egiz_dict.values.get(kz_index);

-

-    String kz_string = restoreKZ(pdf, kz_apr);

-    PdfASID kz = new PdfASID(kz_string);

-

-    return kz;

-  }

-

-  /**

-   * Restores the Kennzeichnung String from an Array.

-   * 

-   * @param pdf

-   *          The PDF.

-   * @param kz_apr

-   *          The Array, as parsed from the EGIZ Dict.

-   * @return Returns the restored KZ.

-   * @throws PDFDocumentException

-   *           Forwarded exception.

-   */

-  public static String restoreKZ(byte[] pdf, ArrayParseResult kz_apr) throws PDFDocumentException

-  {

-    try

-    {

-      List partition = new ArrayList();

-

-      for (int i = 0; i < kz_apr.elements.size() / 2; i++)

-      {

-        NumberParseResult start_npr = (NumberParseResult) kz_apr.elements.get(i * 2);

-        NumberParseResult length_npr = (NumberParseResult) kz_apr.elements.get(i * 2 + 1);

-

-        StringInfo si = new StringInfo();

-        si.string_start = start_npr.number;

-        si.string_length = length_npr.number;

-

-        partition.add(si);

-      }

-

-      String KZ = Placeholder.reconstructStringFromPartition(pdf, partition, BinarySignature.ENCODING_WIN);

-      return KZ;

-    }

-    catch (IOException e1)

-    {

-      throw new PDFDocumentException(ErrorCode.DOCUMENT_CANNOT_BE_READ, e1);

-    }

-  }

-

-  

-  protected static void printFoundHolders (String list_caption, List found_holders, PrintStream writer)

-  {

-    writer.println("------------------------------------");

-    writer.println(list_caption + ": #=" + found_holders.size());

-    

-    for (int i = 0; i < found_holders.size(); i++)

-    {

-      SignatureHolder holder = (SignatureHolder) found_holders.get(i);

-      String kz = "invalid";

-      try

-      {

-        PdfASID kz_id = holder.getSignatureObject().getKZ();

-        if (kz_id == null)

-        {

-          kz = "old signature";

-        }

-        else

-        {

-          kz = kz_id.toString();

-        }

-      }

-      catch (InvalidIDException e)

-      {

-        logger_.error(e.getMessage(), e);

-      }

-      writer.println("  holder[" + i + "]: " + holder.getSignatureObject().getSignationType() + ", KZ=" + kz);

-    }

-

-    writer.println(":" + list_caption);

-    writer.println("------------------------------------");

-

-  }

-  

-  // TODO old code - remove

-//  public static void main(String[] args) throws IOException, PresentableException

-//  {

-//    SettingsReader.initializeForCommandLine();

-//

-//    File in = new File(args[0]);

-//    FileInputStream fis = new FileInputStream(in);

-//    byte[] pdf = new byte[(int) in.length()];

-//    fis.read(pdf);

-//    fis.close();

-//

-//    String text = PdfAS.extractNormalizedTextTextual(pdf, pdf.length);;

-//    

-//    VerificationFilter vf = new VerificationFilter();

-//    //List found = vf.extractSignaturesFromPdf(pdf);

-//

-//    List found = vf.extractSignaturesFromPlainText(text);

-//

-//    printFoundHolders("Final Holders", found, System.out);

-//  }

-}