diff options
Diffstat (limited to 'pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java')
| -rw-r--r-- | pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java | 2145 |
1 files changed, 2145 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java new file mode 100644 index 0000000..ece9525 --- /dev/null +++ b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java @@ -0,0 +1,2145 @@ +/**
+ * <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: BinarySignature.java,v 1.4 2006/10/11 07:57:58 wprinz Exp $
+ */
+package at.knowcenter.wag.egov.egiz.pdf;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.MalformedURLException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+
+import org.apache.commons.lang.ArrayUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import at.gv.egiz.pdfas.api.timestamp.TimeStamper;
+import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.gv.egiz.pdfas.exceptions.pdf.CaptionNotFoundException;
+import at.gv.egiz.pdfas.exceptions.pdf.KZSettingNotFoundException;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+import at.gv.egiz.pdfas.framework.output.DataSink;
+import at.gv.egiz.pdfas.framework.signator.SignatorInformation;
+import at.gv.egiz.pdfas.placeholder.SignaturePlaceholderContext;
+import at.gv.egiz.pdfas.placeholder.SignaturePlaceholderData;
+import at.gv.egiz.pdfas.utils.PDFASUtils;
+import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
+import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
+import at.knowcenter.wag.egov.egiz.exceptions.PlaceholderException;
+import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingNotFoundException;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;
+import at.knowcenter.wag.egov.egiz.sig.SignatureFieldDefinition;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
+import at.knowcenter.wag.egov.egiz.sig.SignatureTypeDefinition;
+import at.knowcenter.wag.egov.egiz.sig.SignatureTypes;
+import at.knowcenter.wag.egov.egiz.tools.CodingHelper;
+import at.knowcenter.wag.exactparser.ByteArrayUtils;
+
+import com.lowagie.text.BadElementException;
+import com.lowagie.text.Document;
+import com.lowagie.text.DocumentException;
+import com.lowagie.text.Image;
+import com.lowagie.text.Rectangle;
+import com.lowagie.text.pdf.BadPdfFormatException;
+import com.lowagie.text.pdf.PRStream;
+import com.lowagie.text.pdf.PdfArray;
+import com.lowagie.text.pdf.PdfContentByte;
+import com.lowagie.text.pdf.PdfDictionary;
+import com.lowagie.text.pdf.PdfImage;
+import com.lowagie.text.pdf.PdfIndirectObject;
+import com.lowagie.text.pdf.PdfIndirectReference;
+import com.lowagie.text.pdf.PdfName;
+import com.lowagie.text.pdf.PdfNumber;
+import com.lowagie.text.pdf.PdfObject;
+import com.lowagie.text.pdf.PdfPTable;
+import com.lowagie.text.pdf.PdfReader;
+import com.lowagie.text.pdf.PdfStamper;
+import com.lowagie.text.pdf.PdfStamperImp;
+import com.lowagie.text.pdf.PdfString;
+import com.lowagie.text.pdf.PdfTemplate;
+
+/**
+ * Contains various extension functions to digitally sign documents.
+ *
+ * <p>
+ * These functions are used to replace parts of the original Egiz plain text
+ * signature mechanism.
+ * </p>
+ *
+ * @author wprinz
+ */
+public abstract class BinarySignature
+{
+//23.11.2010 changed by exthex - added replacePlaceholder(PdfStamper stamper, int pageNr, String placeholderName) method
+
+ protected static Log logger = LogFactory.getLog(BinarySignature.class);
+ /**
+ * The tolerance area of the line break algorithm.
+ *
+ * @see Placeholder#replacePlaceholderWithTolerance(byte[], List, byte[], int)
+ */
+ public static final int LINE_BREAK_TOLERANCE = 10;
+
+ /**
+ * The number of bytes left out for the certificate placeholder.
+ */
+ public static final int CERTIFICATE_PLACEHOLDER_LENGTH = 10000;
+
+ /**
+ * The number of bytes left out for the timestamp placeholder.
+ */
+ public static final int TIMESTAMP_PLACEHOLDER_LENGTH = 5000;
+
+ /**
+ * The placeholder character used to fill out Strings in the layout process.
+ */
+ public static final byte LAYOUT_PLACEHOLDER = 'w';
+
+ /**
+ * This placeholder is used to fill out holes between the byte ranges before
+ * the document is signed.
+ */
+ public static final byte SIGN_PLACEHOLDER = 0;
+
+ /**
+ * The nil brev used to define an unrecognized value.
+ */
+ public static final byte[] BREV_NIL = { 'n', 'i', 'l' };
+
+ /**
+ * The date brev.
+ */
+ public static final byte[] BREV_DAT = { 'd', 'a', 't' };
+
+ /**
+ * The issure brev.
+ */
+ public static final byte[] BREV_ISS = { 'i', 's', 's' };
+
+ /**
+ * The serial number brev.
+ */
+ public static final byte[] BREV_SNR = { 's', 'n', 'r' };
+
+ /**
+ * The value brev.
+ */
+ public static final byte[] BREV_VAL = { 'v', 'a', 'l' };
+
+ /**
+ * The SIG_ID brev.
+ */
+ public static final byte[] BREV_SID = { 's', 'i', 'd' };
+
+ /**
+ * The SIG_ALG brev.
+ */
+ public static final byte[] BREV_ALG = { 'a', 'l', 'g' };
+
+ /**
+ * No explicit encoding.
+ */
+ public static final byte[] ENCODING_NIL = { 'n', 'i', 'l' };
+
+ /**
+ * PDF WinAnsiEncoding.
+ */
+ public static final byte[] ENCODING_WIN = { 'w', 'i', 'n' };
+
+ /**
+ * URL encoding.
+ */
+ public static final byte[] ENCODING_URL = { 'u', 'r', 'l' };
+
+ /**
+ * The PDFName of the Egiz Dictionary.
+ *
+ * <p>
+ * Used to locate and identify the Egiz Dictionary in the document.
+ * </p>
+ */
+ public static final PdfName EGIZ_DICT_NAME = new PdfName("EGIZSigDict");
+
+ /**
+ * The PDFName of the Original Document Size (ODS) field in an Egiz
+ * Dictionary.
+ *
+ * <p>
+ * The ODS must be a positive integral number.
+ * </p>
+ */
+ public static final PdfName EGIZ_ODS_NAME = new PdfName("ODS");
+
+ /**
+ * The PDFName of the Kennzeichnung attribute.
+ */
+ public static final PdfName EGIZ_KZ_NAME = new PdfName("ID");
+
+ /**
+ * The PDFName of the /replaces field in an Egiz Dictionary.
+ */
+ public static final PdfName EGIZ_REPLACES_NAME = new PdfName("replaces");
+
+ /**
+ * The PDFName of the /encodings field in an Egiz Dictionary.
+ */
+ public static final PdfName EGIZ_ENCODINGS_NAME = new PdfName("encodings");
+
+ /**
+ * The PDFName of the byte ranges array.
+ */
+ public static final PdfName EGIZ_BYTERANGES_NAME = new PdfName("ByteRange");
+
+ /**
+ * The PdfName of the certificate array.
+ */
+ public static final PdfName EGIZ_CERTIFICATE_NAME = new PdfName("Cert");
+
+ /**
+ * The PdfName of the Timestamp
+ */
+ public static final PdfName EGIZ_TIMESTAMP_NAME = new PdfName("TimeStamp");
+
+ /**
+ * The PdfName of the data array that contains various egiz-dict data.
+ */
+ public static final PdfName EGIZ_DATA_NAME = new PdfName("Data");
+
+ /**
+ * The PDFName of the Signature XObject field in an Egiz Dictionary.
+ *
+ * <p>
+ * This must be an indirect reference to the XObject containing the Signature
+ * table.
+ * </p>
+ */
+ public static final PdfName EGIZ_XOBJ_NAME = new PdfName("SigXObject");
+
+ /**
+ * The number placeholder that is used to give numbers a fixed length.
+ */
+ protected static final PdfNumber NUMBER_PLACEHOLDER = new PdfNumber(999999999);
+
+ /**
+ * Extracts the signature text only.
+ *
+ * <p>
+ * The signature text is the text of the Signature XObject.
+ * </p>
+ *
+ * @param egiz_dict
+ * The Egiz Dictionary.
+ *
+ * @return Returns the signature text.
+ */
+ public static String extractSignatureTextOnly(PdfDictionary egiz_dict) throws IOException
+ {
+ PdfIndirectReference xobj_ir = (PdfIndirectReference) egiz_dict.get(EGIZ_XOBJ_NAME);
+ PRStream temp_stream = (PRStream) PdfReader.getPdfObject(xobj_ir);
+
+ byte[] stream_bytes = PdfReader.getStreamBytes(temp_stream);
+
+ return Utils.extractPureTextFromContentStream(stream_bytes);
+ }
+
+ /**
+ * Retrieves the size of the original document from the Egiz Dictionary.
+ *
+ * @param egiz_dict
+ * The Egiz Dictionary.
+ * @return Returns the size (in bytes) of the original document.
+ */
+ public static int getOriginalDocumentSizeFromEgizDict(PdfDictionary egiz_dict)
+ {
+ PdfObject ods_obj = egiz_dict.get(EGIZ_ODS_NAME);
+ PdfNumber ods_number = (PdfNumber) PdfReader.getPdfObject(ods_obj);
+
+ return ods_number.intValue();
+ }
+
+ /**
+ * Retrieves the previous Egiz dictionary from the given one, if a previous
+ * dictionary exists.
+ *
+ * @param egiz_dict
+ * The Egiz Dictionary.
+ * @return Returns the previous Egiz Dictionary, or null if there is none.
+ */
+ public static PdfDictionary getPreviousFromEgizDict(PdfDictionary egiz_dict)
+ {
+ PdfObject prev_obj = egiz_dict.get(PdfName.PREV);
+ PdfDictionary previous_dict = (PdfDictionary) PdfReader.getPdfObject(prev_obj);
+ return previous_dict;
+ }
+
+ /**
+ * Retrieves the Egiz Dictionary from the document if present.
+ *
+ * @param reader
+ * The reader to retrieve the dictionary from.
+ * @return Returns the Egiz Dictionary, if present, or returns null, if no
+ * egiz dictionary was found.
+ */
+ public static PdfDictionary getEgizDictFromReader(PdfReader reader)
+ {
+ PdfIndirectReference dict_ir = getEgizDictIndRefFromReader(reader);
+ if (dict_ir == null)
+ {
+ return null;
+ }
+
+ PdfDictionary egiz_dict = (PdfDictionary) PdfReader.getPdfObject(dict_ir);
+
+ return egiz_dict;
+ }
+
+ /**
+ * Retrieves the Egiz Dictionary's indirect reference from the reader.
+ *
+ * @param reader
+ * The reader.
+ * @return Returns the indirect reference of the Egiz Dictionary, or null, if
+ * none exists.
+ */
+ public static PdfIndirectReference getEgizDictIndRefFromReader(PdfReader reader)
+ {
+ PdfDictionary catalog = reader.getCatalog();
+ PdfIndirectReference dict_ir = (PdfIndirectReference) catalog.get(EGIZ_DICT_NAME);
+ return dict_ir;
+ }
+
+ /**
+ * Retrieves the chain of Egiz Dictionaries from the reader.
+ *
+ * <p>
+ * The first element in the List will be the top most (oldest) Egiz
+ * Dictionary. The last element in the List will be the bottom most (latest)
+ * Egiz Dictionary. If the list is empty, no dictionary could be found at all,
+ * which means that the document is not digitally signed.
+ * </p>
+ *
+ * @param reader
+ * The reader.
+ * @return Returns the List of PdfDictionaries from the document.
+ */
+ public static List getEgizDictChainFromReader(PdfReader reader)
+ {
+ List dicts = new ArrayList();
+
+ PdfDictionary current_dict = getEgizDictFromReader(reader);
+ if (current_dict != null)
+ {
+ dicts.add(0, current_dict);
+
+ while ((current_dict = getPreviousFromEgizDict(current_dict)) != null)
+ {
+ dicts.add(0, current_dict);
+ }
+ }
+
+ return dicts;
+ }
+
+ /**
+ * Builds a digest of the given data.
+ *
+ * @param data
+ * The data to be digested.
+ * @param length
+ * The length of the data portion that should be used for digesting.
+ * This allows to build the digest only over parts of the data.
+ * @return Returns the created digest.
+ * @throws PDFDocumentException
+ * Forwarded exception.
+ */
+ public static byte[] buildDigest(final byte[] data, final int length) throws PDFDocumentException
+ {
+ MessageDigest sha_512 = null;
+ try
+ {
+ sha_512 = MessageDigest.getInstance("SHA-512");
+ }
+ catch (NoSuchAlgorithmException e)
+ {
+ e.printStackTrace();
+ throw new PDFDocumentException(202, "Digest algorithm not supported - NoSuchAlgorithmException", e);
+ }
+
+ sha_512.reset();
+ sha_512.update(data, 0, length);
+ byte[] digest = sha_512.digest();
+
+ return digest;
+ }
+
+ /**
+ * Retrieves the signable text from the given document.
+ *
+ * @param data
+ * The data.
+ * @param ods
+ * The original document size.
+ * @return Returns the signable text.
+ */
+ public static String retrieveSignableTextFromData(final byte[] data, final int ods)
+ {
+ // byte[] digest = buildDigest(data, ods);
+ String raw_text = CodingHelper.encodeBase64(data);// digest); // data);
+
+ return raw_text;
+ }
+
+ /**
+ * Fills the holes in the byte ranges with the SIGN_PLACEHOLDER.
+ *
+ * @param data
+ * The given byte ranged data.
+ * @param byte_ranges
+ * The byte ranges.
+ * @return Returns the filled text.
+ */
+ public static byte[] prepareDataToSign(final byte[] data, final List byte_ranges)
+ {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ Iterator it = byte_ranges.iterator();
+ int last_end = 0;
+ while (it.hasNext())
+ {
+ StringInfo si = (StringInfo) it.next();
+
+ for (int i = last_end; i < si.string_start; i++)
+ {
+ baos.write(SIGN_PLACEHOLDER);
+ }
+
+ baos.write(data, si.string_start, si.string_length);
+
+ last_end = si.string_start + si.string_length;
+ }
+ byte[] data_to_sign = baos.toByteArray();
+
+ return data_to_sign;
+ }
+
+ // TODO old code - remove
+ // /**
+ // * Extracts the binary 'text' of a document.
+ // *
+ // * <p>
+ // * If the document contains an Egiz Dictionary, which means that it is
+ // already
+ // * signed, the binary text is the Base64 coded string of the original
+ // document
+ // * followed by the Ascii representation of the signature block.
+ // * </p>
+ // * <p>
+ // * If the document does not contain an Egiz Dictionary, which means that it
+ // is
+ // * unsigned, only the binary Base64 coded original document is returned as
+ // * binary text.
+ // * </p>
+ // * <p>
+ // * This function is intented for being used instead of the "text extraction"
+ // * mechanism used in the plain text Egiz project.
+ // * </p>
+ // *
+ // * @param doc
+ // * The file.
+ // * @return Returns the binary text of the document.
+ // * @throws PDFDocumentException
+ // * Forwarded exception.
+ // */
+ // public static String extractTextBinary(File doc) throws
+ // PDFDocumentException
+ // {
+ // try
+ // {
+ // FileInputStream fis = new FileInputStream(doc);
+ // return extractTextBinary(fis);
+ // }
+ // catch (FileNotFoundException e)
+ // {
+ // throw new PDFDocumentException(202, e);
+ // }
+ // }
+ //
+ // /**
+ // * Extracts the text binary.
+ // *
+ // * @param is
+ // * @return Returns the binary text.
+ // * @throws PDFDocumentException
+ // */
+ // public static String extractTextBinary(InputStream is) throws
+ // PDFDocumentException
+ // {
+ // try
+ // {
+ // // for some stupid reason this produces a read error if the is comes from
+ // // a
+ // // multipart servlet form..???
+ // ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ // int i = -1;
+ // int acc = 0;
+ // byte[] b = new byte[1000];
+ // while ((i = is.read(b)) > 0)
+ // {
+ // acc += i;
+ // System.out.print(" " + i);
+ // baos.write(b, 0, i);
+ // }
+ // System.out.println("acc = " + acc);
+ // byte[] pdf = baos.toByteArray();
+ //
+ // return extractTextBinary(pdf);
+ // }
+ // catch (IOException e)
+ // {
+ // throw new PDFDocumentException(202, e);
+ // }
+ // }
+ //
+ // /**
+ // * Extracts the signable text from a binary pdf document.
+ // *
+ // * <p>
+ // * The signable text is the text that will be signed or verified afterwards.
+ // * </p>
+ // *
+ // * @param pdf
+ // * The pdf document.
+ // * @return Returns the extracted text String.
+ // * @throws PDFDocumentException
+ // * Forwarded exception.
+ // */
+ // public static String extractTextBinary(final byte[] pdf) throws
+ // PDFDocumentException
+ // {
+ // try
+ // {
+ // PdfReader reader = new PdfReader(new ByteArrayInputStream(pdf));
+ // PdfDictionary egiz_dict = getEgizDictFromReader(reader);
+ // if (egiz_dict == null)
+ // {
+ // System.out.println("NO Egiz Dict found - whole doc = original doc");
+ //
+ // int ods = pdf.length;
+ // return retrieveSignableTextFromData(pdf, ods);
+ // }
+ //
+ // String sig_text = extractSignatureTextOnly(egiz_dict);
+ //
+ // int ods = getOriginalDocumentSizeFromEgizDict(egiz_dict);
+ //
+ // String raw_text = retrieveSignableTextFromData(pdf, ods);
+ // raw_text += "\n";
+ // raw_text += sig_text;
+ //
+ // return raw_text;
+ // }
+ // catch (IOException e)
+ // {
+ // throw new PDFDocumentException(202, e);
+ // }
+ // }
+
+ // TODO obsolete code - remove
+ // /**
+ // * Retrieves the List of SignatureHolders containing the information of all
+ // * digital signatures of the given document.
+ // *
+ // * <p>
+ // * If the List of SignatureHolders is empty, the document is not signed
+ // * anyways.
+ // * </p>
+ // *
+ // * @param pdf
+ // * The complete pdf document.
+ // * @return Returns the List of SignatureHolders.
+ // * @throws PDFDocumentException
+ // * @throws SignatureTypesException
+ // * @throws SignatureException
+ // */
+ // public static List extractSignatureHoldersBinary(final byte[] pdf) throws
+ // PDFDocumentException, SignatureTypesException, SignatureException
+ // {
+ // try
+ // {
+ // PdfReader reader = new PdfReader(new ByteArrayInputStream(pdf));
+ // List chain = getEgizDictChainFromReader(reader);
+ //
+ // List signatures = new ArrayList();
+ // Iterator it = chain.iterator();
+ // while (it.hasNext())
+ // {
+ // PdfDictionary dict = (PdfDictionary) it.next();
+ //
+ // int ods = getOriginalDocumentSizeFromEgizDict(dict);
+ // String signature_text = extractSignatureTextOnly(dict);
+ //
+ // SignatureTypes sig_types = SignatureTypes.getInstance();
+ // List types = sig_types.getSignatureTypeDefinitions();
+ // SignatureBlock sig_block = new SignatureBlock(types);
+ // boolean could_separate = sig_block.separateBlockFromRawText(signature_text,
+ // false);
+ //
+ // if (could_separate)
+ // {
+ // SignatureObject sig_object = sig_block.getSignatureObject();
+ //
+ // SignatureHolder holder = new BinarySignatureHolder(pdf, ods, sig_object);
+ // signatures.add(holder);
+ // }
+ // }
+ //
+ // return signatures;
+ // }
+ // catch (IOException e)
+ // {
+ // throw new PDFDocumentException(201, e);
+ // }
+ // }
+
+ // /**
+ // * Signs a document with the given signature table using the Incremental
+ // * Update method.
+ // *
+ // * <p>
+ // * The table containing the signature text will be appended. As specified by
+ // * the parameters, the signature will be appended to the last page, or a
+ // plain
+ // * new page will be created for the signature to hold.
+ // * </p>
+ // * <p>
+ // * The table will be completely wrapped by an XObject, which will also be
+ // * indirectly referenced by the Egiz Dictionary. This will ease the
+ // * verification process.
+ // * </p>
+ // * <p>
+ // * An Egiz Dictionary will be added to the new document that contains
+ // * information about the signature. Basically the size of the original
+ // * document and the reference of the signature table.
+ // * </p>
+ // *
+ // * @param original_document
+ // * The file name of the original document.
+ // * @param new_document
+ // * The file name of the new document to be created.
+ // * @param pdf_table
+ // * The PdfPTable that contains the signature block.
+ // * @param pos_x
+ // * The x position where the table should be inserted.
+ // * @param pos_y
+ // * The y position where the table should be inserted (on the last
+ // * page). If this is negative, a new page will be appended to the
+ // * document. Then the table will be inserted on that new page using
+ // * the absolute value of pos_y. Note that pos_y specifies the top
+ // * line of the table.
+ // * @throws PresentableException
+ // * Forwarded exception.
+ // *
+ // * @see #writeIncrementalUpdate(byte[], PdfPTable, float, float, boolean)
+ // */
+ // public static void writeIncrementalUpdate(String original_document,
+ // String new_document, PdfPTable pdf_table, float pos_x, float pos_y,
+ // int egiz_dict_num_replaces) throws PresentableException
+ // {
+ // try
+ // {
+ // File original_document_file = new File(original_document);
+ // FileInputStream fis = new FileInputStream(original_document_file);
+ // byte[] pdf = new byte[(int) original_document_file.length()];
+ // fis.read(pdf);
+ // fis.close();
+ //
+ // byte[] signed_pdf = writeIncrementalUpdate(pdf, pdf_table, pos_x, pos_y,
+ // egiz_dict_num_replaces);
+ //
+ // File new_document_file = new File(new_document);
+ // FileOutputStream fos = new FileOutputStream(new_document_file);
+ // fos.write(signed_pdf);
+ // fos.close();
+ // }
+ // catch (IOException e)
+ // {
+ // throw new PresentableException(e);
+ // }
+ // }
+
+ protected static int getLineBreakTolerance(IncrementalUpdateInformation iui) throws PDFDocumentException
+ {
+ SettingsReader settings;
+ try
+ {
+ settings = SettingsReader.getInstance();
+ }
+ catch (SettingsException e)
+ {
+ throw new PDFDocumentException(e.getErrorCode(), e);
+ }
+ String phLineBreakTolerance = SignatureTypeDefinition.readPhLenStringFromSettings(settings, iui.signProfile, "line_break_tolerance");
+ int lineBreakTolerance = LINE_BREAK_TOLERANCE;
+ if (phLineBreakTolerance != null)
+ {
+ lineBreakTolerance = Integer.parseInt(phLineBreakTolerance);
+ }
+ return lineBreakTolerance;
+ }
+
+ protected static int getCertificatePlaceholderLength(IncrementalUpdateInformation iui) throws SettingNotFoundException
+ {
+ SettingsReader settings;
+ try
+ {
+ settings = SettingsReader.getInstance();
+ }
+ catch (SettingsException e)
+ {
+ throw new SettingNotFoundException(e);
+ }
+ String certPhLen = SignatureTypeDefinition.readPhLenStringFromSettings(settings, iui.signProfile, "certificate");
+ int certLen = CERTIFICATE_PLACEHOLDER_LENGTH;
+ if (certPhLen != null)
+ {
+ certLen = Integer.parseInt(certPhLen);
+ }
+ return certLen;
+ }
+
+ protected static int getTimestampPlaceholderLength(IncrementalUpdateInformation iui) throws SettingNotFoundException
+ {
+ SettingsReader settings;
+ try
+ {
+ settings = SettingsReader.getInstance();
+ }
+ catch (SettingsException e)
+ {
+ throw new SettingNotFoundException(e);
+ }
+ String phLen = SignatureTypeDefinition.readPhLenStringFromSettings(settings, iui.signProfile, "timestamp");
+ int tsLen = TIMESTAMP_PLACEHOLDER_LENGTH;
+ if (phLen != null)
+ {
+ tsLen = Integer.parseInt(phLen);
+ }
+ return tsLen;
+ }
+
+ /**
+ * Signs a document with the given signature table using the Incremental
+ * Update method.
+ *
+ * <p>
+ * The table containing the signature text will be appended. As specified by
+ * the parameters, the signature will be appended to the last page, or a plain
+ * new page will be created for the signature to hold.
+ * </p>
+ * <p>
+ * The table will be completely wrapped by an XObject, which will also be
+ * indirectly referenced by the Egiz Dictionary. This will ease the
+ * verification process.
+ * </p>
+ * <p>
+ * An Egiz Dictionary will be added to the new document that contains
+ * information about the signature. Basically the size of the original
+ * document and the reference of the signature table.
+ * </p>
+ *
+ * @param original_document
+ * The original document.
+ * @param pdf_table
+ * The PdfPTable that contains the signature block.
+ * @param pi
+ * The PositioningInstruction telling the algorithm where to place
+ * the signature block.
+ * @param invisible_field_definitions
+ * List of invisible field definitions to be added to the egiz dict.
+ * May be null or empty, if there are no invisible fields.
+ * @param invisibleKZString
+ * If not null, thins String is the KZ String to be written into the
+ * /Data array.
+ * @return Returns the new document.
+ * @throws PresentableException
+ * Forwarded exception.
+ */
+ public static IncrementalUpdateInformation writeIncrementalUpdate(PdfDataSource original_document, DataSink written_pdf, PdfPTable pdf_table, String profile, PositioningInstruction pi,
+ List variable_field_definitions, List all_field_definitions, List invisible_field_definitions, String invisibleKZString, TimeStamper timeStamper, SignatorInformation si, SignatureObject so) throws PresentableException
+ {
+ try
+ {
+ IncrementalUpdateInformation iui = new IncrementalUpdateInformation();
+ iui.original_document = original_document;
+ iui.start_index = original_document.getLength();
+ iui.signProfile = profile;
+ iui.timeStamper = timeStamper;
+
+ Document.compress = true; // exthex : compress now, excluding the xobject later
+
+ // System.out.println("wprinz: STAMPING PDF");
+
+ // InputStream is = original_document.createInputStream();
+ byte[] pdf_data = original_document.getAsByteArray();
+ PdfReader reader = new PdfReader(pdf_data);
+ PDFASUtils.checkReaderPermissions(reader);
+ // is.close();
+
+ OutputStream baos = written_pdf.createOutputStream("application/pdf");
+ // ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+ // IMPORTANT: append the new content to the original document using
+ // incremental updated
+ // The stamper allows this by setting append = true
+ boolean adobeSigField = AdobeSignatureHelper.isAdobeSignatureFieldEnabled(so.getSignatureTypeDefinition().getType());
+ PdfStamper stamper = null;
+ if (adobeSigField) {
+ stamper = PdfStamper.createSignature(reader, baos, '\0', null, true);
+ } else {
+ stamper = new PdfStamper(reader, baos, '\0', true);
+ }
+
+ if (pi.isMakeNewPage())
+ {
+ int pdf_page_num = reader.getNumberOfPages();
+
+ Rectangle psize = reader.getPageSizeWithRotation(pdf_page_num);
+ Rectangle rect = new Rectangle(psize);
+ stamper.insertPage(pdf_page_num + 1, rect);
+ }
+
+ if (pi.getPage() < 1 || pi.getPage() > stamper.getReader().getNumberOfPages())
+ {
+ throw new PDFDocumentException(224, "The provided page (=" + pi.getPage() + ") is out of range.");
+ }
+
+ if (SignaturePlaceholderContext.isSignaturePlaceholderDataSet() &&
+ SignaturePlaceholderContext.getSignaturePlaceholderData().getPlaceholderName() != null)
+ {
+ replacePlaceholder(stamper, pi.getPage(), SignaturePlaceholderContext.getSignaturePlaceholderData().getPlaceholderName());
+ }
+
+ PdfContentByte content = stamper.getOverContent(pi.getPage());
+ // content = StampContent einer PageStamp.
+
+ // System.out.println("table_width = " + pdf_table.getTotalWidth() + ",
+ // table_height = " + pdf_table.getTotalHeight());
+
+ PdfTemplate table_template = content.createTemplate(pdf_table.getTotalWidth(), pdf_table.getTotalHeight());
+ table_template.setCompress(Boolean.FALSE); // do not compress sigblock because we rewrite it afterwards for bin sig
+
+ // exthex
+ StructContentHelper structHelper = new StructContentHelper(stamper, content, pi.getPage());
+ structHelper.prepareStructData(table_template);
+
+ pdf_table.writeSelectedRows(0, -1, 0, pdf_table.getTotalHeight(), table_template);
+
+ // table_template.moveTo(0, 0);
+ // table_template.lineTo(pdf_table.getTotalWidth(),
+ // pdf_table.getTotalHeight());
+ // table_template.stroke();
+ // table_template.moveTo(0, 0);
+ // table_template.lineTo(100, 100);
+ // table_template.stroke();
+
+ // pdf_table.writeSelectedRows(0, -1, SIGNATURE_BORDER / 2,
+ // table_position, content);
+
+
+ structHelper.beginSigBlockContent();
+
+ content.addTemplate(table_template, pi.getX(), pi.getY() - pdf_table.getTotalHeight());
+
+ structHelper.endSigBlockContent();
+
+
+ ActualTablePos atp = new ActualTablePos();
+ atp.page = pi.getPage();
+ atp.x = pi.getX();
+ atp.y = pi.getY(); // TODO is this correct or flipped?
+ atp.width = pdf_table.getTotalWidth();
+ atp.height = pdf_table.getTotalHeight();
+ iui.actualTablePos = atp;
+
+ structHelper.buildFigureStructData(so, table_template);
+ structHelper.buildSigBlockStructData();
+ structHelper.finishMainStructData();
+
+ structHelper.buildVerifyLinkStructData(table_template, atp);
+
+ // For debugging print a 100x100 grid
+ // {
+ // Rectangle psize = reader.getPageSizeWithRotation(pos.page);
+ // float page_width = psize.width();
+ // float page_height = psize.height();
+ // for (float x = 0; x < page_width; x += 100)
+ // {
+ // content.moveTo(x, 0);
+ // content.lineTo(x, page_height);
+ // content.stroke();
+ // }
+ // for (float y = 0; y < page_height; y += 100)
+ // {
+ // content.moveTo(0, y);
+ // content.lineTo(page_width, y);
+ // content.stroke();
+ // }
+ // }
+
+ // content.setLineWidth(10.0f);
+ // content.moveTo(0, 0);
+ // content.lineTo(100, 100);
+ // content.stroke();
+
+ // PdfIndirectReference page_ref =
+ // stamper.getWriter().getPageReference(signature_page);
+ // System.out.println("page_ref = " + page_ref.toString());
+
+ // PdfObject page_obj = PdfReader.getPdfObject(page_ref);
+ // System.out.println("page_obj = " + page_obj);
+
+ // PdfDictionary page_dict = (PdfDictionary) page_obj;
+ // PdfObject resources_obj = page_dict.get(PdfName.RESOURCES);
+ // System.out.println("resources_obj = " + resources_obj);
+ // PdfDictionary resources = (PdfDictionary)
+ // PdfReader.getPdfObject(resources_obj);
+ // for (Iterator it = resources.getKeys().iterator(); it.hasNext();)
+ // {
+ // PdfName key = (PdfName) it.next();
+ // PdfObject value = resources.get(key);
+ // System.out.println(" " + key + " = " + value);
+ // }
+
+ // add the EGIZ dict:
+ if (variable_field_definitions != null)
+ {
+ createEgizDict(stamper, table_template, iui, variable_field_definitions, all_field_definitions, invisible_field_definitions, invisibleKZString);
+ }
+
+ if (adobeSigField) {
+ AdobeSignatureHelper.createAdobeSignatureField(stamper, si, so, atp, structHelper); // here..., stamper is closed
+ } else {
+ stamper.close();
+ }
+ // System.out.println("wprinz: STAMPING FINISHED");
+
+ // just to make sure the stream is really closed
+ baos.close();//
+ //org.apache.commons.io.FileUtils.writeByteArrayToFile(new java.io.File("C:/out.pdf"), ((at.gv.egiz.pdfas.impl.output.ByteArrayDataSink) written_pdf).getByteArray());
+ // iui.signed_pdf = baos.toByteArray();
+
+ structHelper.removeCurrent();
+ return iui;
+ }
+ catch (IOException e)
+ {
+ e.printStackTrace();
+ throw new PresentableException(ErrorCode.CANNOT_WRITE_PDF, e);
+ }
+ catch (DocumentException e)
+ {
+ e.printStackTrace();
+ throw new PresentableException(ErrorCode.CANNOT_WRITE_PDF, e);
+ }
+ }
+
+ private static void replacePlaceholder(PdfStamper stamper, int pageNr, String placeholderName) throws BadElementException, MalformedURLException, IOException, BadPdfFormatException, PresentableException {
+ Image img = Image.getInstance(SignaturePlaceholderData.class.getResource("empty.jpg"));
+ PdfImage pImg = new PdfImage(img, "Imwurscht", null);
+ PdfStamperImp stamperImp = (PdfStamperImp)stamper.getWriter();
+ PdfIndirectObject ind = stamperImp.addToBody(pImg);
+
+ PdfDictionary resources = stamper.getReader().getPageN(pageNr).getAsDict(PdfName.RESOURCES);
+ if (ind != null && resources != null)
+ {
+ PdfDictionary xobjDict = resources.getAsDict(PdfName.XOBJECT);
+ if (xobjDict != null)
+ {
+ xobjDict.put(new PdfName(placeholderName), ind.getIndirectReference());
+ stamperImp.markUsed(resources);
+ }
+ else
+ {
+ throw new PresentableException(ErrorCode.CANNOT_WRITE_PDF, new NullPointerException("Image dictionary not found in document structure!"));
+ }
+ }
+ else
+ {
+ throw new PresentableException(ErrorCode.CANNOT_WRITE_PDF, new NullPointerException("Resource dictionary not found in document structure!"));
+ }
+ }
+
+
+ /**
+ * Creates the EGIZ Dictionary and adds it to the document.
+ *
+ * @param stamper
+ * The PdfStamper.
+ * @param table_template
+ * The Template of the Signature block.
+ * @param iui
+ * The IncrementalUpdateInformation.
+ * @param variable_field_definitions
+ * The field definitions.
+ * @throws IOException
+ * @throws SettingNotFoundException
+ * @throws CaptionNotFoundException
+ */
+ protected static void createEgizDict(PdfStamper stamper, PdfTemplate table_template, IncrementalUpdateInformation iui, List variable_field_definitions, List all_field_definitions,
+ List invisible_field_definitions, String invisibleKZString) throws IOException, SettingNotFoundException, CaptionNotFoundException
+ {
+ // iui.temp_ir = table_template.getIndirectReference();
+ iui.temp_ir_number = table_template.getIndirectReference().getNumber();
+ iui.temp_ir_generation = table_template.getIndirectReference().getGeneration();
+
+ byte[] content_stream = table_template.toPdf(null);
+ iui.content_stream_length = content_stream.length;
+
+ iui.replaces = determineReplacesInContentStream(content_stream, 0, content_stream.length, variable_field_definitions);
+ if (invisibleKZString == null)
+ {
+ iui.kz_list = determineKZ(content_stream, 0, content_stream.length, all_field_definitions);
+ }
+ else
+ {
+ StringInfo si = new StringInfo();
+ si.string_start = -1;
+ si.string_length = invisibleKZString.length();
+
+ iui.kz_list = new ArrayList();
+ iui.kz_list.add(si);
+ }
+
+ // PdfIndirectReference previous_egiz_dict_ind_ref =
+ // getEgizDictIndRefFromReader(reader);
+
+ PdfDictionary egiz_dict = new PdfDictionary(EGIZ_DICT_NAME);
+ egiz_dict.put(EGIZ_XOBJ_NAME, table_template.getIndirectReference());
+ egiz_dict.put(EGIZ_ODS_NAME, NUMBER_PLACEHOLDER);
+
+ // /ID
+ PdfArray kz_array = new PdfArray();
+ for (int i = 0; i < iui.kz_list.size(); i++)
+ {
+ kz_array.add(NUMBER_PLACEHOLDER); // start
+ kz_array.add(NUMBER_PLACEHOLDER); // length
+ }
+ egiz_dict.put(EGIZ_KZ_NAME, kz_array);
+
+ // ByteRanges
+ int num_replaces = calcNumReps(iui.replaces);
+ int num_holes = num_replaces + 1 + 1;
+ // +1 = the /encodings hole
+ // +1 = the /Cert
+ // +1 = the /Timestamp
+ if (iui.timeStamper != null) {
+ num_holes += 1;
+ }
+ boolean has_hidden_variable_fields = invisible_field_definitions != null && !invisible_field_definitions.isEmpty();
+ if (has_hidden_variable_fields)
+ {
+ num_holes += invisible_field_definitions.size();
+ }
+ int num_byte_ranges = num_holes + 1;
+
+ PdfArray byte_ranges_array = new PdfArray();
+ for (int i = 0; i < num_byte_ranges; i++)
+ {
+ byte_ranges_array.add(NUMBER_PLACEHOLDER); // start
+ byte_ranges_array.add(NUMBER_PLACEHOLDER); // length
+ }
+ egiz_dict.put(EGIZ_BYTERANGES_NAME, byte_ranges_array);
+
+ PdfArray encodings_array = new PdfArray();
+ encodings_array.add(new PdfName(new String(ENCODING_NIL))); // the
+ // /encodings
+ encodings_array.add(new PdfName(new String(ENCODING_NIL))); // the /Cert
+
+ // array itself
+ PdfArray replaces_array = new PdfArray();
+ replaces_array.add(new PdfName(new String(BREV_NIL, "US-ASCII"))); // the
+ // /encodings
+ replaces_array.add(new PdfName(new String(BREV_NIL, "US-ASCII"))); // the
+ // /Cert
+
+ if (iui.timeStamper != null) {
+ encodings_array.add(new PdfName(new String(ENCODING_NIL))); // the /Timestamp
+ replaces_array.add(new PdfName(new String(BREV_NIL, "US-ASCII"))); // the /timestamp
+
+ }
+
+ // hidden replaces
+ List hidden_replaces = null;
+ if (has_hidden_variable_fields)
+ {
+ hidden_replaces = new ArrayList();
+
+ Iterator it = invisible_field_definitions.iterator();
+ while (it.hasNext())
+ {
+ SignatureFieldDefinition sfd = (SignatureFieldDefinition) it.next();
+ byte[] brev = typeToBrev(sfd.field_name);
+ encodings_array.add(new PdfName(new String(ENCODING_WIN, "US-ASCII")));
+ replaces_array.add(new PdfName(new String(brev, "US-ASCII")));
+
+ ReplaceInfo ri = new ReplaceInfo();
+ ri.brev = brev;
+ ri.enc = ENCODING_WIN;
+ ri.sfd = sfd;
+ ri.replaces = new ArrayList();
+
+ StringInfo si = new StringInfo();
+ si.string_start = -1; // to be determined later on
+ si.string_length = sfd.placeholder_length;
+ ri.replaces.add(si);
+
+ hidden_replaces.add(ri);
+ }
+ }
+
+ // content stream replaces
+ Iterator it = iui.replaces.iterator();
+ while (it.hasNext())
+ {
+ ReplaceInfo ri = (ReplaceInfo) it.next();
+ for (int i = 0; i < ri.replaces.size(); i++)
+ {
+ byte[] brev = typeToBrev(ri.sfd.field_name);
+ encodings_array.add(new PdfName(new String(ENCODING_WIN, "US-ASCII")));
+ replaces_array.add(new PdfName(new String(brev, "US-ASCII")));
+ }
+ }
+ egiz_dict.put(EGIZ_REPLACES_NAME, replaces_array);
+
+ egiz_dict.put(EGIZ_ENCODINGS_NAME, encodings_array);
+
+ PdfArray cert_array = new PdfArray();
+ iui.cert_length = getCertificatePlaceholderLength(iui);
+ byte[] cert_bytes = new byte[iui.cert_length];
+ for (int i = 0; i < cert_bytes.length; i++)
+ {
+ cert_bytes[i] = 0;
+ }
+ PdfString cert_placeholder = new PdfString(cert_bytes);
+ cert_array.add(cert_placeholder);
+ egiz_dict.put(EGIZ_CERTIFICATE_NAME, cert_array);
+
+ // Timestamp
+ if (iui.timeStamper != null) {
+ // only if handler is available
+ PdfArray timestamp_array = new PdfArray();
+ iui.timestamp_length = getTimestampPlaceholderLength(iui);
+ byte[] timestamp_bytes = new byte[iui.timestamp_length];
+ for (int i = 0; i < timestamp_bytes.length; i++)
+ {
+ timestamp_bytes[i] = 0;
+ }
+ PdfString timestamp_placeholder = new PdfString(timestamp_bytes);
+ timestamp_array.add(timestamp_placeholder);
+ egiz_dict.put(EGIZ_TIMESTAMP_NAME, timestamp_array);
+ }
+
+
+ // /Data array with hidden information
+ if (has_hidden_variable_fields || invisibleKZString != null)
+ {
+ PdfArray hidden_fields_array = new PdfArray();
+
+ if (invisibleKZString != null)
+ {
+ PdfString str = new PdfString(invisibleKZString);
+ hidden_fields_array.add(str);
+ }
+
+ if (has_hidden_variable_fields)
+ {
+ iui.replaces.addAll(0, hidden_replaces);
+
+ for (int i = 0; i < invisible_field_definitions.size(); i++)
+ {
+ SignatureFieldDefinition sfd = (SignatureFieldDefinition) invisible_field_definitions.get(i);
+ byte[] placeholder = new byte[sfd.placeholder_length];
+ for (int phIdx = 0; phIdx < placeholder.length; phIdx++)
+ {
+ placeholder[phIdx] = SIGN_PLACEHOLDER;
+ }
+ PdfString str = new PdfString(placeholder);
+ hidden_fields_array.add(str);
+ }
+ }
+
+ egiz_dict.put(EGIZ_DATA_NAME, hidden_fields_array);
+ }
+
+
+ PdfIndirectObject dict_ref = stamper.getWriter().addToBody(egiz_dict);
+ // iui.egiz_dict_ir = dict_ref.getIndirectReference();
+ iui.egiz_dict_ir_number = dict_ref.getIndirectReference().getNumber();
+ iui.egiz_dict_ir_generation = dict_ref.getIndirectReference().getGeneration();
+
+ PdfIndirectReference root_ref = (PdfIndirectReference) stamper.getReader().getTrailer().get(PdfName.ROOT);
+ PdfDictionary root = (PdfDictionary) PdfReader.getPdfObject(root_ref);
+ // root.put(EGIZ_DICT_NAME, dict_ref.getIndirectReference());
+ ((PdfStamperImp) stamper.getWriter()).markUsed(root);
+
+ // PdfDictionary extra_cata = stamper.getWriter().getExtraCatalog();
+ // extra_cata.put(dict_type, dict_ref.getIndirectReference());
+
+ ((PdfStamperImp) stamper.getWriter()).setEgizDictTrailerInfo(EGIZ_DICT_NAME, dict_ref.getIndirectReference());
+ }
+
+ /**
+ * Converts a field name (type) to the corresponding BREV.
+ *
+ * @param type
+ * The field name (type).
+ * @return Returns the corresponding BREV, or BREV_NIL if the type is not
+ * recognized.
+ */
+ protected static byte[] typeToBrev(String type)
+ {
+ if (type.equals(SignatureTypes.SIG_DATE))
+ {
+ return BREV_DAT;
+ }
+ if (type.equals(SignatureTypes.SIG_ISSUER))
+ {
+ return BREV_ISS;
+ }
+ if (type.equals(SignatureTypes.SIG_VALUE))
+ {
+ return BREV_VAL;
+ }
+ if (type.equals(SignatureTypes.SIG_NUMBER))
+ {
+ return BREV_SNR;
+ }
+ if (type.equals(SignatureTypes.SIG_ID))
+ {
+ return BREV_SID;
+ }
+ if (type.equals(SignatureTypes.SIG_ALG))
+ {
+ return BREV_ALG;
+ }
+
+
+ return BREV_NIL;
+ }
+
+ /**
+ * Updates the information in the egiz dictionary to reflect the real offsets
+ * of the byte ranges.
+ *
+ * <p>
+ * This replaces the "dummy numbers" in the egiz dictionary with the correct
+ * values.
+ * </p>
+ *
+ * @param iui
+ * The IncrementalUpdateInformation.
+ * @throws PDFDocumentException
+ */
+ public static void markByteRanges(IncrementalUpdateInformation iui) throws PDFDocumentException
+ {
+ try
+ {
+ iui.byte_ranges = new ArrayList();
+
+ int num_digits = Integer.toString(NUMBER_PLACEHOLDER.intValue()).length();
+ byte[] signed_pdf = iui.signed_pdf;
+
+ String str = iui.egiz_dict_ir_number + " " + iui.egiz_dict_ir_generation + " obj";
+ byte[] obj_bytes = ArrayUtils.add(str.getBytes("US-ASCII"), 0, (byte) 0x0A);
+ int obj_index = ByteArrayUtils.lastIndexOf(signed_pdf, obj_bytes);
+ int obj_start = obj_index + obj_bytes.length;
+
+ String ods_str = "/ODS ";
+ byte[] ods_bytes = ods_str.getBytes("US-ASCII");
+ int ods_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, ods_bytes);
+ int ods_start = ods_index + ods_bytes.length;
+
+ String kz_str = "/ID[";
+ byte[] kz_bytes = kz_str.getBytes("US-ASCII");
+ int kz_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, kz_bytes);
+ int kz_start = kz_index + kz_bytes.length;
+
+ String br_str = "/ByteRange[";
+ byte[] br_bytes = br_str.getBytes("US-ASCII");
+ int br_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, br_bytes);
+ int array_start = br_index + br_bytes.length;
+
+ String enc_str = "/encodings[";
+ byte[] enc_bytes = enc_str.getBytes("US-ASCII");
+ int enc_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, enc_bytes);
+ int enc_start = enc_index + enc_bytes.length;
+
+ String cert_str = "/Cert[(";
+ byte[] cert_bytes = cert_str.getBytes("US-ASCII");
+ int cert_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, cert_bytes);
+ int cert_start = cert_index + cert_bytes.length;
+
+ //Timestamp
+ int timestamp_index = 0;
+ int timestamp_start = 0;
+ if (iui.timeStamper != null) {
+ String timestamp_str = "/TimeStamp[(";
+ byte[] timestamp_bytes = timestamp_str.getBytes("US-ASCII");
+ timestamp_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, timestamp_bytes);
+ timestamp_start = timestamp_index + timestamp_bytes.length;
+ }
+
+ replaceNumber(signed_pdf, ods_start, signed_pdf.length, num_digits);
+
+
+ int cur_pos = array_start;
+ int cur_br_start = 0;
+
+
+ // write the /encodings byte range
+ {
+ int num_replaces = calcNumReps(iui.replaces);
+ int num_holes = num_replaces + 1 + 1;
+ // +1 = the /encodings hole
+ // +1 = the /Cert
+ // +1 = the /Timestamp
+ if (iui.timeStamper != null) {
+ num_holes += 1;
+ }
+
+ int enc_length = (1 + 3) * num_holes;
+
+ StringInfo byte_range = new StringInfo();
+ byte_range.string_start = cur_br_start;
+ byte_range.string_length = enc_start;
+ iui.byte_ranges.add(byte_range);
+
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+
+ cur_br_start = enc_start + enc_length;
+
+ iui.enc_start = enc_start;
+ iui.enc_length = enc_length;
+ }
+
+ // write the /Cert byte range
+ {
+ StringInfo byte_range = new StringInfo();
+ byte_range.string_start = cur_br_start;
+ byte_range.string_length = cert_start - cur_br_start;
+ iui.byte_ranges.add(byte_range);
+
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+
+ cur_br_start = cert_start + iui.cert_length;
+
+ iui.cert_start = cert_start;
+ }
+
+ // write the /Timestamp byte range
+ if (iui.timeStamper != null) {
+ StringInfo byte_range = new StringInfo();
+ byte_range.string_start = cur_br_start;
+ byte_range.string_length = timestamp_start - cur_br_start;
+ iui.byte_ranges.add(byte_range);
+
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+
+ cur_br_start = timestamp_start + iui.timestamp_length;
+
+ iui.timestamp_start = timestamp_start;
+ }
+
+ // determine the /Data byte ranges if any
+ List ifd = iui.invisible_field_definitions;
+ if (!ifd.isEmpty() || iui.invisibleKZString != null)
+ {
+ String data_str = "/Data[(";
+ byte[] data_bytes = data_str.getBytes("US-ASCII");
+ int data_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, data_bytes);
+ int data_start = data_index + data_bytes.length;
+
+ int hole_start = data_start;
+
+ if (iui.invisibleKZString != null)
+ {
+ StringInfo si = (StringInfo) iui.kz_list.get(0);
+ si.string_start = hole_start;
+
+ hole_start += si.string_length + 2;
+ }
+
+ for (int i = 0; i < ifd.size(); i++)
+ {
+ ReplaceInfo ri = (ReplaceInfo) iui.replaces.get(i);
+ StringInfo si = (StringInfo) ri.replaces.get(0);
+ si.string_start = hole_start;
+
+ hole_start += si.string_length + 2;
+ }
+
+ }
+
+ Iterator rit = iui.replaces.iterator();
+ while (rit.hasNext())
+ {
+ ReplaceInfo ri = (ReplaceInfo) rit.next();
+
+ // byte [] value_bytes = ri.value.getBytes("ISO-8859-1");
+ // int write_pos = 0;
+
+ Iterator sit = ri.replaces.iterator();
+ while (sit.hasNext())
+ {
+ StringInfo si = (StringInfo) sit.next();
+
+ StringInfo byte_range = new StringInfo();
+ byte_range.string_start = cur_br_start;
+ byte_range.string_length = si.string_start - cur_br_start;
+ iui.byte_ranges.add(byte_range);
+
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+
+ cur_br_start = si.string_start + si.string_length;
+ }
+
+ }
+
+ StringInfo byte_range = new StringInfo();
+ byte_range.string_start = cur_br_start;
+ byte_range.string_length = signed_pdf.length - cur_br_start;
+ iui.byte_ranges.add(byte_range);
+
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+
+
+ // update the Kennzeichnung byte ranges
+ cur_pos = kz_start;
+ for (int i = 0; i < iui.kz_list.size(); i++)
+ {
+ StringInfo si = (StringInfo) iui.kz_list.get(i);
+
+ replaceNumber(signed_pdf, cur_pos, si.string_start, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ replaceNumber(signed_pdf, cur_pos, si.string_length, num_digits);
+ cur_pos += num_digits;
+ cur_pos += 1;
+ }
+
+ }
+ catch (IOException e)
+ {
+ throw new PDFDocumentException(201, e);
+ }
+
+ }
+
+ /**
+ * Replaces the certificate placeholder with the certificate from the signed
+ * Signature Object.
+ *
+ * @param iui
+ * The IncrementalUpdateInformation.
+ * @throws PDFDocumentException
+ */
+ public static void replaceCertificate(IncrementalUpdateInformation iui) throws PDFDocumentException
+ {
+ X509Certificate certificate = iui.signed_signature_object.getX509Certificate();
+ try
+ {
+ byte[] der = certificate.getEncoded();
+ byte[] encoded = CodingHelper.encodeBase64(der).getBytes("US-ASCII");
+ byte[] escaped = Placeholder.escapePDFString(encoded);
+ if (escaped.length > iui.cert_length)
+ {
+ throw new PlaceholderException("certificate", escaped.length - iui.cert_length);
+ }
+ System.arraycopy(escaped, 0, iui.signed_pdf, iui.cert_start, escaped.length);
+ }
+ catch (CertificateEncodingException e)
+ {
+ throw new PDFDocumentException(300, e);
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ throw new PDFDocumentException(300, e);
+ }
+
+ // X509Cert cert = iui.signed_signature_object.getX509Cert();
+ // // X509Certificate certificate = cert.getX509Certificate();
+ // try
+ // {
+ // byte[] encoded = cert.getCertString().getBytes("US-ASCII"); //
+ // certificate.getEncoded();
+ // byte[] escaped = Placeholder.escapePDFString(encoded);
+ // if (escaped.length > iui.cert_length)
+ // {
+ // throw new PlaceholderException("certificate", escaped.length -
+ // iui.cert_length);
+ // }
+ // System.arraycopy(escaped, 0, iui.signed_pdf, iui.cert_start,
+ // escaped.length);
+ // }
+ // // catch (CertificateEncodingException e)
+ // // {
+ // // throw new PDFDocumentException(300, e);
+ // // }
+ // catch (UnsupportedEncodingException e)
+ // {
+ // throw new PDFDocumentException(300, e);
+ // }
+ }
+
+ /**
+ * Replaces the timestam placeholder with the timestamp from the signed
+ * Signature Object.
+ *
+ * @param iui
+ * The IncrementalUpdateInformation.
+ * @throws PDFDocumentException
+ */
+ public static void replaceTimestamp(IncrementalUpdateInformation iui) throws PDFDocumentException
+ {
+ String timestamp = iui.signed_signature_object.getSigTimeStamp();
+ if (timestamp != null) {
+ byte[] escaped = Placeholder.escapePDFString(timestamp.getBytes());
+ if (escaped.length > iui.timestamp_length)
+ {
+ throw new PlaceholderException("timestamp", escaped.length - iui.timestamp_length);
+ }
+ System.arraycopy(escaped, 0, iui.signed_pdf, iui.timestamp_start, escaped.length);
+ }
+ }
+
+ /**
+ * Replaces the placeholders with values from the signed SignatureObject.
+ *
+ * @param iui
+ * The IncrementalUpdateInformation.
+ * @throws PDFDocumentException
+ */
+ public static void replacePlaceholders(IncrementalUpdateInformation iui) throws PDFDocumentException
+ {
+ final int lineBreakTolerance = getLineBreakTolerance(iui);
+
+ final byte[] signed_pdf = iui.signed_pdf;
+
+ // int num_replaces = calcNumReps(iui.replaces);
+ // int num_holes = num_replaces + 1 + 1; // +1 = the /encodings hole; +1 =
+ // the
+ // /Cert
+
+ int encoding_entry_index = 0;
+ {// /encodings itself
+ int enc_offset = iui.enc_start + encoding_entry_index * 4;
+ signed_pdf[enc_offset] = '/';
+ System.arraycopy(ENCODING_NIL, 0, signed_pdf, enc_offset + 1, ENCODING_NIL.length);
+ encoding_entry_index++;
+ }
+ {// /Cert itself
+ int enc_offset = iui.enc_start + encoding_entry_index * 4;
+ signed_pdf[enc_offset] = '/';
+ System.arraycopy(ENCODING_NIL, 0, signed_pdf, enc_offset + 1, ENCODING_NIL.length);
+ encoding_entry_index++;
+ }
+ if (iui.signed_signature_object.getSigTimeStamp() != null)
+ {// /Timestamp itself
+ int enc_offset = iui.enc_start + encoding_entry_index * 4;
+ signed_pdf[enc_offset] = '/';
+ System.arraycopy(ENCODING_NIL, 0, signed_pdf, enc_offset + 1, ENCODING_NIL.length);
+ encoding_entry_index++;
+ }
+
+ for (int i = 0; i < iui.replaces.size(); i++)
+ {
+ ReplaceInfo ri = (ReplaceInfo) iui.replaces.get(i);
+
+ try
+ {
+ String value = ri.value;
+
+ if (value == null)
+ {
+ value = "";
+ }
+
+ byte[] encoding = ENCODING_WIN;
+ byte[] replace_bytes = Placeholder.applyWinAnsiEncoding(value);
+
+ String restored_value = Placeholder.unapplyWinAnsiEncoding(replace_bytes);
+ if (!value.equals(restored_value))
+ {
+ // debug:
+ logger.warn("WinAnsiEncoding doesn't fit - using URL instead!");
+ // /debug!
+
+ replace_bytes = Placeholder.applyURLEncoding(value);
+
+ encoding = ENCODING_URL;
+ }
+
+ for (int string_index = 0; string_index < ri.replaces.size(); string_index++)
+ {
+ int enc_offset = iui.enc_start + encoding_entry_index * 4;
+ signed_pdf[enc_offset] = '/';
+ System.arraycopy(encoding, 0, signed_pdf, enc_offset + 1, encoding.length);
+ encoding_entry_index++;
+ }
+
+ Placeholder.replacePlaceholderWithTolerance(signed_pdf, ri.replaces, replace_bytes, lineBreakTolerance);
+ }
+ catch (PlaceholderException e)
+ {
+ throw new PlaceholderException(ri.sfd.field_name, e.getMissing());
+ }
+
+ }
+ }
+
+ /**
+ * Calculates the number of actual String replaces from a given ReplaceInfo
+ * list.
+ * <p>
+ * This is used to determine the number of actual replaces that has to be
+ * carried out. Accordingly to this number, entries in the dictionary are
+ * created.
+ * </p>
+ *
+ * @param replaces
+ * The ReplaceInfo list.
+ * @return Returns the number of string replaces.
+ */
+ protected static int calcNumReps(List replaces)
+ {
+ int number = 0;
+ Iterator it = replaces.iterator();
+ while (it.hasNext())
+ {
+ ReplaceInfo ri = (ReplaceInfo) it.next();
+ number += ri.replaces.size();
+ }
+ return number;
+ }
+
+ /**
+ * Determines the List of ReplaceInfo objects of replaces in the content
+ * stream regarding the given field definitions.
+ *
+ * <p>
+ * This method collects all variable String fields in a content stream and
+ * orders them according to their start offset.
+ * </p>
+ *
+ * @param pdf
+ * The PDF.
+ * @param begin
+ * The start of the content stream.
+ * @param end
+ * The end of the content stream.
+ * @param field_definitions
+ * The field definitions that are counceled to find out which and
+ * where varaible strings are.
+ * @return Returns the list of ReplaceInfo objects specifying the variable
+ * areas.
+ * @throws CaptionNotFoundException
+ */
+ protected static List determineReplacesInContentStream(final byte[] pdf, int begin, int end, List field_definitions) throws CaptionNotFoundException
+ {
+ List replaces = new ArrayList();
+ try
+ {
+
+ List strings = Placeholder.parseStrings(pdf, begin, end);
+
+ for (int index = 0; index < field_definitions.size(); index++)
+ {
+ SignatureFieldDefinition sfd = (SignatureFieldDefinition) field_definitions.get(index);
+
+ if (sfd.placeholder_length > 0)
+ {
+ ReplaceInfo ri = new ReplaceInfo();
+ ri.sfd = sfd;
+ ri.replaces = new ArrayList();
+
+ byte[] caption = sfd.caption.getBytes("ISO-8859-1");
+
+ int caption_index = findIndex(strings, caption);
+ if (caption_index < 0)
+ {
+ throw new CaptionNotFoundException(sfd.caption);
+ }
+ int start_index = skipStrings(strings, caption_index, caption);
+ int next_index = findFirstNotPlaceholder(strings, start_index);
+
+ for (int i = start_index; i < next_index; i++)
+ {
+ StringInfo si = (StringInfo) strings.get(i);
+ ri.replaces.add(si);
+ }
+
+ replaces.add(ri);
+ }
+ }
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ logger.error(e.getMessage(), e);
+ }
+
+ // sort replaces
+ Collections.sort(replaces, new Comparator() {
+ public int compare(Object arg0, Object arg1)
+ {
+ ReplaceInfo ri0 = (ReplaceInfo) arg0;
+ ReplaceInfo ri1 = (ReplaceInfo) arg1;
+ int start0 = ((StringInfo) ri0.replaces.get(0)).string_start;
+ int start1 = ((StringInfo) ri1.replaces.get(0)).string_start;
+ return start0 - start1;
+ }
+ });
+
+ return replaces;
+ }
+
+ /**
+ * Determines the Kennzeichnug in the content stream.
+ *
+ * @param pdf
+ * The PDF.
+ * @param begin
+ * The start of the content stream.
+ * @param end
+ * The end of the content stream.
+ * @param field_definitions
+ * The field definitions.
+ * @return Returns the List of StringInfo objects representing the KZ field.
+ * @throws SettingNotFoundException
+ * F.e.
+ */
+ protected static List determineKZ(final byte[] pdf, int begin, int end, List field_definitions) throws SettingNotFoundException
+ {
+ try
+ {
+ List strings = Placeholder.parseStrings(pdf, begin, end);
+
+ for (int index = 0; index < field_definitions.size(); index++)
+ {
+ SignatureFieldDefinition sfd = (SignatureFieldDefinition) field_definitions.get(index);
+
+ if (sfd.field_name.equals(SignatureTypes.SIG_KZ))
+ {
+ List kz_list = new ArrayList();
+
+ byte[] caption = sfd.caption.getBytes("ISO-8859-1");
+
+ int caption_index = findIndex(strings, caption);
+ int start_index = skipStrings(strings, caption_index, caption);
+
+ int end_index = -1;
+ for (end_index = start_index; end_index < strings.size(); end_index++)
+ {
+ StringInfo si = (StringInfo) strings.get(end_index);
+
+ if (startsWithCaption(si, field_definitions))
+ {
+ break;
+ }
+
+ kz_list.add(si);
+ }
+
+ return kz_list;
+ }
+ }
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ logger.error(e.getMessage(), e);
+ }
+ throw new KZSettingNotFoundException("Field " + SignatureTypes.SIG_KZ + " not found.");
+ }
+
+ /**
+ * Finds the index of the StringInfo within the StringInfo list that has the
+ * given content (caption).
+ *
+ * @param strings
+ * The list of StringInfos.
+ * @param caption
+ * The text to be matched to the strings.
+ * @return Returns the index of the found string, or -1 if no string matched.
+ */
+ protected static int findIndex(List strings, byte[] caption)
+ {
+ for (int i = 0; i < strings.size(); i++)
+ {
+ if (isCaption(strings, i, caption))
+ {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ protected static boolean isCaption(List strings, int index, byte[] caption)
+ {
+ try
+ {
+
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ for (int i = index; i < strings.size(); i++)
+ {
+ StringInfo si = (StringInfo) strings.get(i);
+ baos.write(si.copyStringBytes());
+ }
+ byte[] str_data = baos.toByteArray();
+ byte[] unescaped = Placeholder.unescapePDFString(str_data);
+ if (ByteArrayUtils.compareByteArrays(unescaped, 0, caption))
+ {
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+ }
+ catch (IOException e)
+ {
+ logger.error(e.getMessage(), e);
+ return false;
+ }
+
+ }
+
+ protected static int skipStrings(List strings, int index, byte[] caption)
+ {
+ int length = 0;
+ for (int i = index; i < strings.size(); i++)
+ {
+ StringInfo si = (StringInfo) strings.get(i);
+ length += si.string_length;
+
+ if (length >= caption.length)
+ {
+ return i + 1;
+ }
+ }
+ return -1;
+ }
+
+ /**
+ * Tells, if the given StringInfo contains only placeholder characters.
+ *
+ * @param si
+ * The StringInfo.
+ * @param placeholder
+ * The placeholder character.
+ * @return Returns true, if the string contains only the given placeholder
+ * characters, false otherwise.
+ */
+ protected static boolean isPlaceholder(StringInfo si, byte placeholder)
+ {
+ byte[] string_bytes = si.copyStringBytes();
+ for (int i = 0; i < string_bytes.length; i++)
+ {
+ if (string_bytes[i] != placeholder)
+ {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ protected static boolean startsWithCaption(StringInfo si, List field_definitions)
+ {
+ try
+ {
+ for (int i = 0; i < field_definitions.size(); i++)
+ {
+ SignatureFieldDefinition sfd = (SignatureFieldDefinition) field_definitions.get(i);
+
+ String caption = sfd.caption;
+ String str = si.getString("ISO-8859-1");
+
+ if (caption.startsWith(str))
+ {
+ return true;
+ }
+ }
+ return false;
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ logger.error(e.getMessage(), e);
+ return false;
+ }
+ }
+
+ /**
+ * Finds the first string after and at the given index not being a placeholder
+ * string.
+ *
+ * @param strings
+ * The list of StringInfos.
+ * @param start
+ * The index where to start the search.
+ * @return Returns the index of the first not placeholder string, or
+ * strings.size() if no more non placeholder strings could be found.
+ */
+ protected static int findFirstNotPlaceholder(List strings, int start)
+ {
+ for (int i = start; i < strings.size(); i++)
+ {
+ StringInfo si = (StringInfo) strings.get(i);
+ if (!isPlaceholder(si, LAYOUT_PLACEHOLDER))
+ {
+ return i;
+ }
+ }
+ return strings.size();
+ }
+
+ /**
+ * Restores the given String to its placeholder.
+ *
+ * @param pdf
+ * The PDF.
+ * @param si
+ * The string.
+ * @param placeholder
+ * The placeholder the string should be filled with.
+ */
+ public static void restorePlaceholder(final byte[] pdf, StringInfo si, final byte placeholder)
+ {
+ byte[] ph = new byte[si.string_length];
+ for (int i = 0; i < ph.length; i++)
+ {
+ ph[i] = placeholder;
+ }
+ System.arraycopy(ph, 0, pdf, si.string_start, ph.length);
+ }
+
+ /**
+ * Reconstructs the replaces from the PDF and forms suitable value strings.
+ *
+ * @param pdf
+ * The PDF.
+ * @param brevs
+ * The brevs.
+ * @param sis
+ * The StringInfo objects of the strings.
+ * @return Returns the List of ReplaceInfo objects containing the restored
+ * values.
+ * @throws PDFDocumentException
+ */
+ public static List reconstructReplaces(final byte[] pdf, byte[][] brevs, StringInfo[] sis, byte[][] encodings) throws PDFDocumentException
+ {
+ try
+ {
+ List replaces = new ArrayList();
+
+ ReplaceInfo cur_ri = null;
+
+ for (int cur = 0; cur < brevs.length; cur++)
+ {
+ if (ByteArrayUtils.compareByteArrays(brevs[cur], 0, BREV_NIL))
+ {
+ continue;
+ }
+
+ if (cur_ri == null || !ByteArrayUtils.compareByteArrays(cur_ri.brev, 0, brevs[cur]))
+ {
+ if (cur >= encodings.length) {
+ throw new PDFDocumentException(ErrorCode.INVALID_SIGNATURE_DICTIONARY, "Invalid EGIZ signature dictionary.");
+ }
+ cur_ri = new ReplaceInfo();
+
+ cur_ri.replaces = new ArrayList();
+
+ cur_ri.brev = brevs[cur];
+ cur_ri.enc = encodings[cur];
+
+ replaces.add(cur_ri);
+ }
+
+ cur_ri.replaces.add(sis[cur]);
+ }
+
+ // restore value Strings
+ Iterator rit = replaces.iterator();
+ while (rit.hasNext())
+ {
+ ReplaceInfo ri = (ReplaceInfo) rit.next();
+ ri.value = Placeholder.reconstructStringFromPartition(pdf, ri.replaces, ri.enc);
+
+ // System.out.println(new String(ri.brev, "US-ASCII") + ": " +
+ // ri.value);
+ }
+
+ return replaces;
+ }
+ catch (IOException e)
+ {
+ throw new PDFDocumentException(310, e);
+ }
+
+ }
+
+ /**
+ * Reads an unsigned integer number.
+ *
+ * @param pdf
+ * The PDF.
+ * @param start_index
+ * The start index of the number.
+ * @param num_digits
+ * The number of digits.
+ * @return Returns the read number.
+ */
+ public static int readNumber(final byte[] pdf, final int start_index, final int num_digits)
+ {
+ try
+ {
+ byte[] n_bytes = new byte[num_digits];
+ System.arraycopy(pdf, start_index, n_bytes, 0, num_digits);
+ String n_string = new String(n_bytes, "US-ASCII");
+
+ int n = Integer.parseInt(n_string);
+ return n;
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ logger.error(e.getMessage(), e);
+ return -1;
+ }
+ }
+
+ /**
+ * Replaces a number by the new value.
+ *
+ * @param pdf
+ * The PDF.
+ * @param start_index
+ * The start index of the number.
+ * @param number
+ * The new number.
+ * @param num_digits
+ * The number of digits.
+ */
+ public static void replaceNumber(final byte[] pdf, final int start_index, final int number, final int num_digits)
+ {
+ try
+ {
+ if (number < 0)
+ {
+ throw new IllegalArgumentException("The given number " + number + " must not be negative.");
+ }
+ String number_string = Integer.toString(number);
+ if (number_string.length() > num_digits)
+ {
+ throw new IllegalArgumentException("The given number " + number + " has more than " + num_digits + " digits.");
+ }
+
+ int leading_zeros = num_digits - number_string.length();
+ String zeros_string = "";
+ for (int i = 0; i < leading_zeros; i++)
+ {
+ zeros_string += "0";
+ }
+
+ String total_string = zeros_string + number_string;
+ byte[] total_bytes = total_string.getBytes("US-ASCII");
+ System.arraycopy(total_bytes, 0, pdf, start_index, num_digits);
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ logger.error(e.getMessage(), e);
+ }
+ }
+
+
+ // TODO old code - remove
+ // /**
+ // * For debugging purposes.
+ // *
+ // * @param args
+ // * @throws IOException
+ // */
+ // public static void main(String[] args) throws IOException
+ // {
+ // File signed_doc = new File("C:/wprinz/temp.pdf");
+ //
+ // PdfReader reader = new PdfReader(new FileInputStream(signed_doc));
+ // PdfDictionary egiz_dict = getEgizDictFromReader(reader);
+ // if (egiz_dict == null)
+ // {
+ // System.out.println("NO Egiz Dict");
+ // return;
+ // }
+ //
+ // String sig_text = extractSignatureTextOnly(egiz_dict);
+ // System.out.println("Sig Text:");
+ // System.out.println(sig_text);
+ //
+ // int ods = getOriginalDocumentSizeFromEgizDict(egiz_dict);
+ // System.out.println("Original Document Size = " + ods);
+ // }
+
+}
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