diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java | 1349 |
1 files changed, 1349 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java b/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java new file mode 100644 index 0000000..52b186c --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java @@ -0,0 +1,1349 @@ +/*
+ * Copyright 2004 by Paulo Soares.
+ *
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the License.
+ *
+ * The Original Code is 'iText, a free JAVA-PDF library'.
+ *
+ * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
+ * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
+ * All Rights Reserved.
+ * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
+ * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
+ *
+ * Contributor(s): all the names of the contributors are added in the source code
+ * where applicable.
+ *
+ * Alternatively, the contents of this file may be used under the terms of the
+ * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
+ * provisions of LGPL are applicable instead of those above. If you wish to
+ * allow use of your version of this file only under the terms of the LGPL
+ * License and not to allow others to use your version of this file under
+ * the MPL, indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by the LGPL.
+ * If you do not delete the provisions above, a recipient may use your version
+ * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the MPL as stated above or under the terms of the GNU
+ * Library General Public License as published by the Free Software Foundation;
+ * either version 2 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
+ * details.
+ *
+ * If you didn't download this code from the following link, you should check if
+ * you aren't using an obsolete version:
+ * http://www.lowagie.com/iText/
+ */
+package com.lowagie.text.pdf;
+
+import com.lowagie.text.Rectangle;
+import com.lowagie.text.ExceptionConverter;
+import com.lowagie.text.Phrase;
+import com.lowagie.text.Font;
+import com.lowagie.text.Element;
+import com.lowagie.text.Image;
+import com.lowagie.text.DocumentException;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Iterator;
+import java.text.SimpleDateFormat;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.security.cert.CRL;
+import java.security.PrivateKey;
+import java.io.OutputStream;
+import java.io.IOException;
+import java.io.EOFException;
+import java.io.RandomAccessFile;
+import java.io.File;
+import java.io.InputStream;
+
+/**
+ * This class takes care of the cryptographic options and appearances that form a signature.
+ */
+public class PdfSignatureAppearance {
+
+ /**
+ * The self signed filter.
+ */
+ public static final PdfName SELF_SIGNED = PdfName.ADOBE_PPKLITE;
+ /**
+ * The VeriSign filter.
+ */
+ public static final PdfName VERISIGN_SIGNED = PdfName.VERISIGN_PPKVS;
+ /**
+ * The Windows Certificate Security.
+ */
+ public static final PdfName WINCER_SIGNED = PdfName.ADOBE_PPKMS;
+
+ private static final float topSection = 0.3f;
+ private static final float margin = 2;
+ private Rectangle rect;
+ private Rectangle pageRect;
+ private PdfTemplate app[] = new PdfTemplate[5];
+ private PdfTemplate frm;
+ private PdfStamperImp writer;
+ private String layer2Text;
+ private String reason;
+ private String location;
+ private Calendar signDate;
+ private String provider;
+ private int page = 1;
+ private String fieldName;
+ private PrivateKey privKey;
+ private Certificate[] certChain;
+ private CRL[] crlList;
+ private PdfName filter;
+ private boolean newField;
+ private ByteBuffer sigout;
+ private OutputStream originalout;
+ private File tempFile;
+ private PdfDictionary cryptoDictionary;
+ private PdfStamper stamper;
+ private boolean preClosed = false;
+ private PdfSigGenericPKCS sigStandard;
+ private int range[];
+ private RandomAccessFile raf;
+ private int rangePosition = 0;
+ private byte bout[];
+ private int boutLen;
+ private byte externalDigest[];
+ private byte externalRSAdata[];
+ private String digestEncryptionAlgorithm;
+ private HashMap exclusionLocations;
+
+ PdfSignatureAppearance(PdfStamperImp writer) {
+ this.writer = writer;
+ signDate = new GregorianCalendar();
+ fieldName = getNewSigName();
+ }
+
+ /**
+ * Sets the signature text identifying the signer.
+ * @param text the signature text identifying the signer. If <CODE>null</CODE> or not set
+ * a standard description will be used
+ */
+ public void setLayer2Text(String text) {
+ layer2Text = text;
+ }
+
+ /**
+ * Gets the signature text identifying the signer if set by setLayer2Text().
+ * @return the signature text identifying the signer
+ */
+ public String getLayer2Text() {
+ return layer2Text;
+ }
+
+ /**
+ * Sets the text identifying the signature status.
+ * @param text the text identifying the signature status. If <CODE>null</CODE> or not set
+ * the description "Signature Not Verified" will be used
+ */
+ public void setLayer4Text(String text) {
+ layer4Text = text;
+ }
+
+ /**
+ * Gets the text identifying the signature status if set by setLayer4Text().
+ * @return the text identifying the signature status
+ */
+ public String getLayer4Text() {
+ return layer4Text;
+ }
+
+ /**
+ * Gets the rectangle representing the signature dimensions.
+ * @return the rectangle representing the signature dimensions. It may be <CODE>null</CODE>
+ * or have zero width or height for invisible signatures
+ */
+ public Rectangle getRect() {
+ return rect;
+ }
+
+ /**
+ * Gets the visibility status of the signature.
+ * @return the visibility status of the signature
+ */
+ public boolean isInvisible() {
+ return (rect == null || rect.width() == 0 || rect.height() == 0);
+ }
+
+ /**
+ * Sets the cryptographic parameters.
+ * @param privKey the private key
+ * @param certChain the certificate chain
+ * @param crlList the certificate revocation list. It may be <CODE>null</CODE>
+ * @param filter the crytographic filter type. It can be SELF_SIGNED, VERISIGN_SIGNED or WINCER_SIGNED
+ */
+ public void setCrypto(PrivateKey privKey, Certificate[] certChain, CRL[] crlList, PdfName filter) {
+ this.privKey = privKey;
+ this.certChain = certChain;
+ this.crlList = crlList;
+ this.filter = filter;
+ }
+
+ /**
+ * Sets the signature to be visible. It creates a new visible signature field.
+ * @param pageRect the position and dimension of the field in the page
+ * @param page the page to place the field. The fist page is 1
+ * @param fieldName the field name or <CODE>null</CODE> to generate automatically a new field name
+ */
+ public void setVisibleSignature(Rectangle pageRect, int page, String fieldName) {
+ if (fieldName != null) {
+ if (fieldName.indexOf('.') >= 0)
+ throw new IllegalArgumentException("Field names cannot contain a dot.");
+ AcroFields af = writer.getAcroFields();
+ AcroFields.Item item = af.getFieldItem(fieldName);
+ if (item != null)
+ throw new IllegalArgumentException("The field " + fieldName + " already exists.");
+ this.fieldName = fieldName;
+ }
+ if (page < 1 || page > writer.reader.getNumberOfPages())
+ throw new IllegalArgumentException("Invalid page number: " + page);
+ this.pageRect = new Rectangle(pageRect);
+ this.pageRect.normalize();
+ rect = new Rectangle(this.pageRect.width(), this.pageRect.height());
+ this.page = page;
+ newField = true;
+ }
+
+ /**
+ * Sets the signature to be visible. An empty signature field with the same name must already exist.
+ * @param fieldName the existing empty signature field name
+ */
+ public void setVisibleSignature(String fieldName) {
+ AcroFields af = writer.getAcroFields();
+ AcroFields.Item item = af.getFieldItem(fieldName);
+ if (item == null)
+ throw new IllegalArgumentException("The field " + fieldName + " does not exist.");
+ PdfDictionary merged = (PdfDictionary)item.merged.get(0);
+ if (!PdfName.SIG.equals(PdfReader.getPdfObject(merged.get(PdfName.FT))))
+ throw new IllegalArgumentException("The field " + fieldName + " is not a signature field.");
+ this.fieldName = fieldName;
+ PdfArray r = (PdfArray)PdfReader.getPdfObject(merged.get(PdfName.RECT));
+ ArrayList ar = r.getArrayList();
+ float llx = ((PdfNumber)PdfReader.getPdfObject((PdfObject)ar.get(0))).floatValue();
+ float lly = ((PdfNumber)PdfReader.getPdfObject((PdfObject)ar.get(1))).floatValue();
+ float urx = ((PdfNumber)PdfReader.getPdfObject((PdfObject)ar.get(2))).floatValue();
+ float ury = ((PdfNumber)PdfReader.getPdfObject((PdfObject)ar.get(3))).floatValue();
+ pageRect = new Rectangle(llx, lly, urx, ury);
+ pageRect.normalize();
+ page = ((Integer)item.page.get(0)).intValue();
+ int rotation = writer.reader.getPageRotation(page);
+ Rectangle pageSize = writer.reader.getPageSizeWithRotation(page);
+ switch (rotation) {
+ case 90:
+ pageRect = new Rectangle(
+ pageRect.bottom(),
+ pageSize.top() - pageRect.left(),
+ pageRect.top(),
+ pageSize.top() - pageRect.right());
+ break;
+ case 180:
+ pageRect = new Rectangle(
+ pageSize.right() - pageRect.left(),
+ pageSize.top() - pageRect.bottom(),
+ pageSize.right() - pageRect.right(),
+ pageSize.top() - pageRect.top());
+ break;
+ case 270:
+ pageRect = new Rectangle(
+ pageSize.right() - pageRect.bottom(),
+ pageRect.left(),
+ pageSize.right() - pageRect.top(),
+ pageRect.right());
+ break;
+ }
+ if (rotation != 0)
+ pageRect.normalize();
+ rect = new Rectangle(this.pageRect.width(), this.pageRect.height());
+ }
+
+ /**
+ * Gets a template layer to create a signature appearance. The layers can go from 0 to 4.
+ * <p>
+ * Consult <A HREF="http://partners.adobe.com/asn/developer/pdfs/tn/PPKAppearances.pdf">PPKAppearances.pdf</A>
+ * for further details.
+ * @param layer the layer
+ * @return a template
+ */
+ public PdfTemplate getLayer(int layer) {
+ if (layer < 0 || layer >= app.length)
+ return null;
+ PdfTemplate t = app[layer];
+ if (t == null) {
+ t = app[layer] = new PdfTemplate(writer);
+ t.setBoundingBox(rect);
+ writer.addDirectTemplateSimple(t, new PdfName("n" + layer));
+ }
+ return t;
+ }
+
+ /**
+ * Gets the template that aggregates all appearance layers. This corresponds to the /FRM resource.
+ * <p>
+ * Consult <A HREF="http://partners.adobe.com/asn/developer/pdfs/tn/PPKAppearances.pdf">PPKAppearances.pdf</A>
+ * for further details.
+ * @return the template that aggregates all appearance layers
+ */
+ public PdfTemplate getTopLayer() {
+ if (frm == null) {
+ frm = new PdfTemplate(writer);
+ frm.setBoundingBox(rect);
+ writer.addDirectTemplateSimple(frm, new PdfName("FRM"));
+ }
+ return frm;
+ }
+
+ /**
+ * Gets the main appearance layer.
+ * <p>
+ * Consult <A HREF="http://partners.adobe.com/asn/developer/pdfs/tn/PPKAppearances.pdf">PPKAppearances.pdf</A>
+ * for further details.
+ * @return the main appearance layer
+ * @throws DocumentException on error
+ * @throws IOException on error
+ */
+ public PdfTemplate getAppearance() throws DocumentException, IOException {
+ if (app[0] == null) {
+ PdfTemplate t = app[0] = new PdfTemplate(writer);
+ t.setBoundingBox(new Rectangle(100, 100));
+ writer.addDirectTemplateSimple(t, new PdfName("n0"));
+ t.setLiteral("% DSBlank\n");
+ }
+ if (app[1] == null && !acro6Layers) {
+ PdfTemplate t = app[1] = new PdfTemplate(writer);
+ t.setBoundingBox(new Rectangle(100, 100));
+ writer.addDirectTemplateSimple(t, new PdfName("n1"));
+ t.setLiteral(questionMark);
+ }
+ if (app[2] == null) {
+ String text;
+ if (layer2Text == null) {
+ StringBuffer buf = new StringBuffer();
+ buf.append("Digitally signed by ").append(PdfPKCS7.getSubjectFields((X509Certificate)certChain[0]).getField("CN")).append("\n");
+ SimpleDateFormat sd = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss z");
+ buf.append("Date: ").append(sd.format(signDate.getTime()));
+ if (reason != null)
+ buf.append("\n").append("Reason: ").append(reason);
+ if (location != null)
+ buf.append("\n").append("Location: ").append(location);
+ text = buf.toString();
+ }
+ else
+ text = layer2Text;
+ PdfTemplate t = app[2] = new PdfTemplate(writer);
+ t.setBoundingBox(rect);
+ writer.addDirectTemplateSimple(t, new PdfName("n2"));
+ if (image != null) {
+ if (imageScale == 0) {
+ t.addImage(image, rect.width(), 0, 0, rect.height(), 0, 0);
+ }
+ else {
+ float usableScale = imageScale;
+ if (imageScale < 0)
+ usableScale = Math.min(rect.width() / image.width(), rect.height() / image.height());
+ float w = image.width() * usableScale;
+ float h = image.height() * usableScale;
+ float x = (rect.width() - w) / 2;
+ float y = (rect.height() - h) / 2;
+ t.addImage(image, w, 0, 0, h, x, y);
+ }
+ }
+ Font font;
+ if (layer2Font == null)
+ font = new Font();
+ else
+ font = new Font(layer2Font);
+ float size = font.size();
+ if (size <= 0) {
+ Rectangle sr = new Rectangle(rect.width() - 2 * margin, rect.height() * (1 - topSection) - 2 * margin);
+ size = fitText(font, text, sr, 12, runDirection);
+ }
+ ColumnText ct = new ColumnText(t);
+ ct.setRunDirection(runDirection);
+ ct.setSimpleColumn(new Phrase(text, font), margin, 0, rect.width() - margin, rect.height() * (1 - topSection) - margin, size, Element.ALIGN_LEFT);
+ ct.go();
+ }
+ if (app[3] == null && !acro6Layers) {
+ PdfTemplate t = app[3] = new PdfTemplate(writer);
+ t.setBoundingBox(new Rectangle(100, 100));
+ writer.addDirectTemplateSimple(t, new PdfName("n3"));
+ t.setLiteral("% DSBlank\n");
+ }
+ if (app[4] == null && !acro6Layers) {
+ PdfTemplate t = app[4] = new PdfTemplate(writer);
+ t.setBoundingBox(new Rectangle(0, rect.height() * (1 - topSection), rect.right(), rect.top()));
+ writer.addDirectTemplateSimple(t, new PdfName("n4"));
+ Font font;
+ if (layer2Font == null)
+ font = new Font();
+ else
+ font = new Font(layer2Font);
+ float size = font.size();
+ String text = "Signature Not Verified";
+ if (layer4Text != null)
+ text = layer4Text;
+ Rectangle sr = new Rectangle(rect.width() - 2 * margin, rect.height() * topSection - 2 * margin);
+ size = fitText(font, text, sr, 15, runDirection);
+ ColumnText ct = new ColumnText(t);
+ ct.setRunDirection(runDirection);
+ ct.setSimpleColumn(new Phrase(text, font), margin, 0, rect.width() - margin, rect.height() - margin, size, Element.ALIGN_LEFT);
+ ct.go();
+ }
+ int rotation = writer.reader.getPageRotation(page);
+ Rectangle rotated = new Rectangle(rect);
+ int n = rotation;
+ while (n > 0) {
+ rotated = rotated.rotate();
+ n -= 90;
+ }
+ if (frm == null) {
+ frm = new PdfTemplate(writer);
+ frm.setBoundingBox(rotated);
+ writer.addDirectTemplateSimple(frm, new PdfName("FRM"));
+ float scale = Math.min(rect.width(), rect.height()) * 0.9f;
+ float x = (rect.width() - scale) / 2;
+ float y = (rect.height() - scale) / 2;
+ scale /= 100;
+ if (rotation == 90)
+ frm.concatCTM(0, 1, -1, 0, rect.height(), 0);
+ else if (rotation == 180)
+ frm.concatCTM(-1, 0, 0, -1, rect.width(), rect.height());
+ else if (rotation == 270)
+ frm.concatCTM(0, -1, 1, 0, 0, rect.width());
+ frm.addTemplate(app[0], 0, 0);
+ if (!acro6Layers)
+ frm.addTemplate(app[1], scale, 0, 0, scale, x, y);
+ frm.addTemplate(app[2], 0, 0);
+ if (!acro6Layers) {
+ frm.addTemplate(app[3], scale, 0, 0, scale, x, y);
+ frm.addTemplate(app[4], 0, 0);
+ }
+ }
+ PdfTemplate napp = new PdfTemplate(writer);
+ napp.setBoundingBox(rotated);
+ writer.addDirectTemplateSimple(napp, null);
+ napp.addTemplate(frm, 0, 0);
+ return napp;
+ }
+
+ /**
+ * Fits the text to some rectangle adjusting the font size as needed.
+ * @param font the font to use
+ * @param text the text
+ * @param rect the rectangle where the text must fit
+ * @param maxFontSize the maximum font size
+ * @param runDirection the run direction
+ * @return the calculated font size that makes the text fit
+ */
+ public static float fitText(Font font, String text, Rectangle rect, float maxFontSize, int runDirection) {
+ try {
+ ColumnText ct = null;
+ int status = 0;
+ if (maxFontSize <= 0) {
+ int cr = 0;
+ int lf = 0;
+ char t[] = text.toCharArray();
+ for (int k = 0; k < t.length; ++k) {
+ if (t[k] == '\n')
+ ++lf;
+ else if (t[k] == '\r')
+ ++cr;
+ }
+ int minLines = Math.max(cr, lf) + 1;
+ maxFontSize = Math.abs(rect.height()) / minLines - 0.001f;
+ }
+ font.setSize(maxFontSize);
+ Phrase ph = new Phrase(text, font);
+ ct = new ColumnText(null);
+ ct.setSimpleColumn(ph, rect.left(), rect.bottom(), rect.right(), rect.top(), maxFontSize, Element.ALIGN_LEFT);
+ ct.setRunDirection(runDirection);
+ status = ct.go(true);
+ if ((status & ColumnText.NO_MORE_TEXT) != 0)
+ return maxFontSize;
+ float precision = 0.1f;
+ float min = 0;
+ float max = maxFontSize;
+ float size = maxFontSize;
+ for (int k = 0; k < 50; ++k) { //just in case it doesn't converge
+ size = (min + max) / 2;
+ ct = new ColumnText(null);
+ font.setSize(size);
+ ct.setSimpleColumn(new Phrase(text, font), rect.left(), rect.bottom(), rect.right(), rect.top(), size, Element.ALIGN_LEFT);
+ ct.setRunDirection(runDirection);
+ status = ct.go(true);
+ if ((status & ColumnText.NO_MORE_TEXT) != 0) {
+ if (max - min < size * precision)
+ return size;
+ min = size;
+ }
+ else
+ max = size;
+ }
+ return size;
+ }
+ catch (Exception e) {
+ throw new ExceptionConverter(e);
+ }
+ }
+
+ /**
+ * Sets the digest/signature to an external calculated value.
+ * @param digest the digest. This is the actual signature
+ * @param RSAdata the extra data that goes into the data tag in PKCS#7
+ * @param digestEncryptionAlgorithm the encryption algorithm. It may must be <CODE>null</CODE> if the <CODE>digest</CODE>
+ * is also <CODE>null</CODE>. If the <CODE>digest</CODE> is not <CODE>null</CODE>
+ * then it may be "RSA" or "DSA"
+ */
+ public void setExternalDigest(byte digest[], byte RSAdata[], String digestEncryptionAlgorithm) {
+ externalDigest = digest;
+ externalRSAdata = RSAdata;
+ this.digestEncryptionAlgorithm = digestEncryptionAlgorithm;
+ }
+
+ /**
+ * Gets the signing reason.
+ * @return the signing reason
+ */
+ public String getReason() {
+ return this.reason;
+ }
+
+ /**
+ * Sets the signing reason.
+ * @param reason the signing reason
+ */
+ public void setReason(String reason) {
+ this.reason = reason;
+ }
+
+ /**
+ * Gets the signing location.
+ * @return the signing location
+ */
+ public String getLocation() {
+ return this.location;
+ }
+
+ /**
+ * Sets the signing location.
+ * @param location the signing location
+ */
+ public void setLocation(String location) {
+ this.location = location;
+ }
+
+ /**
+ * Returns the Cryptographic Service Provider that will sign the document.
+ * @return provider the name of the provider, for example "SUN",
+ * or <code>null</code> to use the default provider.
+ */
+ public String getProvider() {
+ return this.provider;
+ }
+
+ /**
+ * Sets the Cryptographic Service Provider that will sign the document.
+ *
+ * @param provider the name of the provider, for example "SUN", or
+ * <code>null</code> to use the default provider.
+ */
+ public void setProvider(String provider) {
+ this.provider = provider;
+ }
+
+ /**
+ * Gets the private key.
+ * @return the private key
+ */
+ public java.security.PrivateKey getPrivKey() {
+ return privKey;
+ }
+
+ /**
+ * Gets the certificate chain.
+ * @return the certificate chain
+ */
+ public java.security.cert.Certificate[] getCertChain() {
+ return this.certChain;
+ }
+
+ /**
+ * Gets the certificate revocation list.
+ * @return the certificate revocation list
+ */
+ public java.security.cert.CRL[] getCrlList() {
+ return this.crlList;
+ }
+
+ /**
+ * Gets the filter used to sign the document.
+ * @return the filter used to sign the document
+ */
+ public com.lowagie.text.pdf.PdfName getFilter() {
+ return filter;
+ }
+
+ /**
+ * Checks if a new field was created.
+ * @return <CODE>true</CODE> if a new field was created, <CODE>false</CODE> if signing
+ * an existing field or if the signature is invisible
+ */
+ public boolean isNewField() {
+ return this.newField;
+ }
+
+ /**
+ * Gets the page number of the field.
+ * @return the page number of the field
+ */
+ public int getPage() {
+ return page;
+ }
+
+ /**
+ * Gets the field name.
+ * @return the field name
+ */
+ public java.lang.String getFieldName() {
+ return fieldName;
+ }
+
+ /**
+ * Gets the rectangle that represent the position and dimension of the signature in the page.
+ * @return the rectangle that represent the position and dimension of the signature in the page
+ */
+ public com.lowagie.text.Rectangle getPageRect() {
+ return pageRect;
+ }
+
+ /**
+ * Gets the signature date.
+ * @return the signature date
+ */
+ public java.util.Calendar getSignDate() {
+ return signDate;
+ }
+
+ /**
+ * Sets the signature date.
+ * @param signDate the signature date
+ */
+ public void setSignDate(java.util.Calendar signDate) {
+ this.signDate = signDate;
+ }
+
+ com.lowagie.text.pdf.ByteBuffer getSigout() {
+ return sigout;
+ }
+
+ void setSigout(com.lowagie.text.pdf.ByteBuffer sigout) {
+ this.sigout = sigout;
+ }
+
+ java.io.OutputStream getOriginalout() {
+ return originalout;
+ }
+
+ void setOriginalout(java.io.OutputStream originalout) {
+ this.originalout = originalout;
+ }
+
+ /**
+ * Gets the temporary file.
+ * @return the temporary file or <CODE>null</CODE> is the document is created in memory
+ */
+ public java.io.File getTempFile() {
+ return tempFile;
+ }
+
+ void setTempFile(java.io.File tempFile) {
+ this.tempFile = tempFile;
+ }
+
+ /**
+ * Gets a new signature fied name that doesn't clash with any existing name.
+ * @return a new signature fied name
+ */
+ public String getNewSigName() {
+ AcroFields af = writer.getAcroFields();
+ String name = "Signature";
+ int step = 0;
+ boolean found = false;
+ while (!found) {
+ ++step;
+ String n1 = name + step;
+ if (af.getFieldItem(n1) != null)
+ continue;
+ n1 += ".";
+ found = true;
+ for (Iterator it = af.getFields().keySet().iterator(); it.hasNext();) {
+ String fn = (String)it.next();
+ if (fn.startsWith(n1)) {
+ found = false;
+ break;
+ }
+ }
+ }
+ name += step;
+ return name;
+ }
+
+ /**
+ * This is the first method to be called when using external signatures. The general sequence is:
+ * preClose(), getDocumentBytes() and close().
+ * <p>
+ * If calling preClose() <B>dont't</B> call PdfStamper.close().
+ * <p>
+ * No external signatures are allowed if this methos is called.
+ * @throws IOException on error
+ * @throws DocumentException on error
+ */
+ public void preClose() throws IOException, DocumentException {
+ preClose(null);
+ }
+ /**
+ * This is the first method to be called when using external signatures. The general sequence is:
+ * preClose(), getDocumentBytes() and close().
+ * <p>
+ * If calling preClose() <B>dont't</B> call PdfStamper.close().
+ * <p>
+ * If using an external signature <CODE>exclusionSizes</CODE> must contain at least
+ * the <CODE>PdfName.CONTENTS</CODE> key with the size that it will take in the
+ * document. Note that due to the hex string coding this size should be
+ * byte_size*2+2.
+ * @param exclusionSizes a <CODE>HashMap</CODE> with names and sizes to be excluded in the signature
+ * calculation. The key is a <CODE>PdfName</CODE> and the value an
+ * <CODE>Integer</CODE>. At least the <CODE>PdfName.CONTENTS</CODE> must be present
+ * @throws IOException on error
+ * @throws DocumentException on error
+ */
+ public void preClose(HashMap exclusionSizes) throws IOException, DocumentException {
+ if (preClosed)
+ throw new DocumentException("Document already pre closed.");
+ preClosed = true;
+ AcroFields af = writer.getAcroFields();
+ String name = getFieldName();
+ boolean fieldExists = !(isInvisible() || isNewField());
+ int flags = 132;
+ PdfIndirectReference refSig = writer.getPdfIndirectReference();
+ if (fieldExists && name.indexOf('.') >= 0) {
+ ArrayList widgets = af.getFieldItem(name).widgets;
+ PdfDictionary widget = (PdfDictionary)widgets.get(0);
+ writer.markUsed(widget);
+ widget.put(PdfName.P, writer.getPageReference(getPage()));
+ widget.put(PdfName.V, refSig);
+ PdfDictionary ap = new PdfDictionary();
+ ap.put(PdfName.N, getAppearance().getIndirectReference());
+ widget.put(PdfName.AP, ap);
+ }
+ else {
+ if (fieldExists) {
+ flags = 0;
+ ArrayList merged = af.getFieldItem(name).merged;
+ PdfObject obj = PdfReader.getPdfObjectRelease(((PdfDictionary)merged.get(0)).get(PdfName.F));
+ if (obj != null && obj.isNumber())
+ flags = ((PdfNumber)obj).intValue();
+ af.removeField(name);
+ }
+ writer.setSigFlags(3);
+ PdfFormField sigField = PdfFormField.createSignature(writer);
+ sigField.setFieldName(name);
+ sigField.put(PdfName.V, refSig);
+ sigField.setFlags(flags);
+
+ int pagen = getPage();
+ if (!isInvisible()) {
+ sigField.setWidget(getPageRect(), null);
+ sigField.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, getAppearance());
+ }
+ else
+ sigField.setWidget(new Rectangle(0, 0), null);
+ sigField.setPage(pagen);
+ writer.addAnnotation(sigField, pagen);
+ }
+
+ exclusionLocations = new HashMap();
+ if (cryptoDictionary == null) {
+ if (PdfName.ADOBE_PPKLITE.equals(getFilter()))
+ sigStandard = new PdfSigGenericPKCS.PPKLite(getProvider());
+ else if (PdfName.ADOBE_PPKMS.equals(getFilter()))
+ sigStandard = new PdfSigGenericPKCS.PPKMS(getProvider());
+ else if (PdfName.VERISIGN_PPKVS.equals(getFilter()))
+ sigStandard = new PdfSigGenericPKCS.VeriSign(getProvider());
+ else
+ throw new IllegalArgumentException("Unknown filter: " + getFilter());
+ sigStandard.setExternalDigest(externalDigest, externalRSAdata, digestEncryptionAlgorithm);
+ if (getReason() != null)
+ sigStandard.setReason(getReason());
+ if (getLocation() != null)
+ sigStandard.setLocation(getLocation());
+ if (getContact() != null)
+ sigStandard.setContact(getContact());
+ sigStandard.put(PdfName.M, new PdfDate(getSignDate()));
+ sigStandard.setSignInfo(getPrivKey(), getCertChain(), getCrlList());
+ PdfString contents = (PdfString)sigStandard.get(PdfName.CONTENTS);
+ PdfLiteral lit = new PdfLiteral((contents.toString().length() + (PdfName.ADOBE_PPKLITE.equals(getFilter())?0:64)) * 2 + 2);
+ exclusionLocations.put(PdfName.CONTENTS, lit);
+ sigStandard.put(PdfName.CONTENTS, lit);
+ lit = new PdfLiteral(80);
+ exclusionLocations.put(PdfName.BYTERANGE, lit);
+ sigStandard.put(PdfName.BYTERANGE, lit);
+ if (certified)
+ addDocMDP(sigStandard);
+ if (signatureEvent != null)
+ signatureEvent.getSignatureDictionary(sigStandard);
+ writer.addToBody(sigStandard, refSig, false);
+ }
+ else {
+ PdfLiteral lit = new PdfLiteral(80);
+ exclusionLocations.put(PdfName.BYTERANGE, lit);
+ cryptoDictionary.put(PdfName.BYTERANGE, lit);
+ for (Iterator it = exclusionSizes.entrySet().iterator(); it.hasNext();) {
+ Map.Entry entry = (Map.Entry)it.next();
+ PdfName key = (PdfName)entry.getKey();
+ Integer v = (Integer)entry.getValue();
+ lit = new PdfLiteral(v.intValue());
+ exclusionLocations.put(key, lit);
+ cryptoDictionary.put(key, lit);
+ }
+ if (certified)
+ addDocMDP(cryptoDictionary);
+ if (signatureEvent != null)
+ signatureEvent.getSignatureDictionary(cryptoDictionary);
+ writer.addToBody(cryptoDictionary, refSig, false);
+ }
+ if (certified) {
+ // add DocMDP entry to root
+ PdfDictionary docmdp = new PdfDictionary();
+ docmdp.put(new PdfName("DocMDP"), refSig);
+ writer.reader.getCatalog().put(new PdfName("Perms"), docmdp);
+ }
+ writer.close(stamper.getMoreInfo());
+
+ range = new int[exclusionLocations.size() * 2];
+ int byteRangePosition = ((PdfLiteral)exclusionLocations.get(PdfName.BYTERANGE)).getPosition();
+ exclusionLocations.remove(PdfName.BYTERANGE);
+ int idx = 1;
+ for (Iterator it = exclusionLocations.values().iterator(); it.hasNext();) {
+ PdfLiteral lit = (PdfLiteral)it.next();
+ int n = lit.getPosition();
+ range[idx++] = n;
+ range[idx++] = lit.getPosLength() + n;
+ }
+ Arrays.sort(range, 1, range.length - 1);
+ for (int k = 3; k < range.length - 2; k += 2)
+ range[k] -= range[k - 1];
+
+ if (tempFile == null) {
+ bout = sigout.getBuffer();
+ boutLen = sigout.size();
+ range[range.length - 1] = boutLen - range[range.length - 2];
+ ByteBuffer bf = new ByteBuffer();
+ bf.append('[');
+ for (int k = 0; k < range.length; ++k)
+ bf.append(range[k]).append(' ');
+ bf.append(']');
+ System.arraycopy(bf.getBuffer(), 0, bout, byteRangePosition, bf.size());
+ }
+ else {
+ try {
+ raf = new RandomAccessFile(tempFile, "rw");
+ int boutLen = (int)raf.length();
+ range[range.length - 1] = boutLen - range[range.length - 2];
+ ByteBuffer bf = new ByteBuffer();
+ bf.append('[');
+ for (int k = 0; k < range.length; ++k)
+ bf.append(range[k]).append(' ');
+ bf.append(']');
+ raf.seek(byteRangePosition);
+ raf.write(bf.getBuffer(), 0, bf.size());
+ }
+ catch (IOException e) {
+ try{raf.close();}catch(Exception ee){}
+ try{tempFile.delete();}catch(Exception ee){}
+ throw e;
+ }
+ }
+ }
+
+ /**
+ * This is the last method to be called when using external signatures. The general sequence is:
+ * preClose(), getDocumentBytes() and close().
+ * <p>
+ * <CODE>update</CODE> is a <CODE>PdfDictionary</CODE> that must have exactly the
+ * same keys as the ones provided in {@link #preClose(HashMap)}.
+ * @param update a <CODE>PdfDictionary</CODE> with the key/value that will fill the holes defined
+ * in {@link #preClose(HashMap)}
+ * @throws DocumentException on error
+ * @throws IOException on error
+ */
+ public void close(PdfDictionary update) throws IOException, DocumentException {
+ try {
+ if (!preClosed)
+ throw new DocumentException("preClose() must be called first.");
+ ByteBuffer bf = new ByteBuffer();
+ for (Iterator it = update.getKeys().iterator(); it.hasNext();) {
+ PdfName key = (PdfName)it.next();
+ PdfObject obj = update.get(key);
+ PdfLiteral lit = (PdfLiteral)exclusionLocations.get(key);
+ if (lit == null)
+ throw new IllegalArgumentException("The key " + key.toString() + " didn't reserve space in preClose().");
+ bf.reset();
+ obj.toPdf(null, bf);
+ if (bf.size() > lit.getPosLength())
+ throw new IllegalArgumentException("The key " + key.toString() + " is too big. Is " + bf.size() + ", reserved " + lit.getPosLength());
+ if (tempFile == null)
+ System.arraycopy(bf.getBuffer(), 0, bout, lit.getPosition(), bf.size());
+ else {
+ raf.seek(lit.getPosition());
+ raf.write(bf.getBuffer(), 0, bf.size());
+ }
+ }
+ if (update.size() != exclusionLocations.size())
+ throw new IllegalArgumentException("The update dictionary has less keys than required.");
+ if (tempFile == null) {
+ originalout.write(bout, 0, boutLen);
+ }
+ else {
+ if (originalout != null) {
+ raf.seek(0);
+ int length = (int)raf.length();
+ byte buf[] = new byte[8192];
+ while (length > 0) {
+ int r = raf.read(buf, 0, Math.min(buf.length, length));
+ if (r < 0)
+ throw new EOFException("Unexpected EOF");
+ originalout.write(buf, 0, r);
+ length -= r;
+ }
+ }
+ }
+ }
+ finally {
+ if (tempFile != null) {
+ try{raf.close();}catch(Exception ee){}
+ if (originalout != null)
+ try{tempFile.delete();}catch(Exception ee){}
+ }
+ if (originalout != null)
+ try{originalout.close();}catch(Exception e){}
+ }
+ }
+
+ private void addDocMDP(PdfDictionary crypto) {
+ PdfDictionary reference = new PdfDictionary();
+ PdfDictionary transformParams = new PdfDictionary();
+ transformParams.put(PdfName.P, new PdfNumber(1));
+ transformParams.put(PdfName.V, new PdfName("1.2"));
+ transformParams.put(PdfName.TYPE, new PdfName("TransformParams"));
+ reference.put(new PdfName("TransformMethod"), new PdfName("DocMDP"));
+ reference.put(PdfName.TYPE, new PdfName("SigRef"));
+ reference.put(new PdfName("TransformParams"), transformParams);
+ PdfArray types = new PdfArray();
+ types.add(reference);
+ crypto.put(new PdfName("Reference"), types);
+ }
+
+ private static int indexArray(byte bout[], int position, String search) {
+ byte ss[] = PdfEncodings.convertToBytes(search, null);
+ while (true) {
+ int k;
+ for (k = 0; k < ss.length; ++k) {
+ if (ss[k] != bout[position + k])
+ break;
+ }
+ if (k == ss.length)
+ return position;
+ ++position;
+ }
+ }
+
+ private static int indexFile(RandomAccessFile raf, int position, String search) throws IOException {
+ byte ss[] = PdfEncodings.convertToBytes(search, null);
+ while (true) {
+ raf.seek(position);
+ int k;
+ for (k = 0; k < ss.length; ++k) {
+ int b = raf.read();
+ if (b < 0)
+ throw new EOFException("Unexpected EOF");
+ if (ss[k] != (byte)b)
+ break;
+ }
+ if (k == ss.length)
+ return position;
+ ++position;
+ }
+ }
+
+ /**
+ * Gets the document bytes that are hashable when using external signatures. The general sequence is:
+ * preClose(), getRangeStream() and close().
+ * <p>
+ * @return the document bytes that are hashable
+ */
+ public InputStream getRangeStream() {
+ return new PdfSignatureAppearance.RangeStream(raf, bout, range);
+ }
+
+ /**
+ * Gets the user made signature dictionary. This is the dictionary at the /V key.
+ * @return the user made signature dictionary
+ */
+ public com.lowagie.text.pdf.PdfDictionary getCryptoDictionary() {
+ return cryptoDictionary;
+ }
+
+ /**
+ * Sets a user made signature dictionary. This is the dictionary at the /V key.
+ * @param cryptoDictionary a user made signature dictionary
+ */
+ public void setCryptoDictionary(com.lowagie.text.pdf.PdfDictionary cryptoDictionary) {
+ this.cryptoDictionary = cryptoDictionary;
+ }
+
+ /**
+ * Gets the <CODE>PdfStamper</CODE> associated with this instance.
+ * @return the <CODE>PdfStamper</CODE> associated with this instance
+ */
+ public com.lowagie.text.pdf.PdfStamper getStamper() {
+ return stamper;
+ }
+
+ void setStamper(com.lowagie.text.pdf.PdfStamper stamper) {
+ this.stamper = stamper;
+ }
+
+ /**
+ * Checks if the document is in the process of closing.
+ * @return <CODE>true</CODE> if the document is in the process of closing,
+ * <CODE>false</CODE> otherwise
+ */
+ public boolean isPreClosed() {
+ return preClosed;
+ }
+
+ /**
+ * Gets the instance of the standard signature dictionary. This instance
+ * is only available after pre close.
+ * <p>
+ * The main use is to insert external signatures.
+ * @return the instance of the standard signature dictionary
+ */
+ public com.lowagie.text.pdf.PdfSigGenericPKCS getSigStandard() {
+ return sigStandard;
+ }
+
+ /**
+ * Gets the signing contact.
+ * @return the signing contact
+ */
+ public String getContact() {
+ return this.contact;
+ }
+
+ /**
+ * Sets the signing contact.
+ * @param contact the signing contact
+ */
+ public void setContact(String contact) {
+ this.contact = contact;
+ }
+
+ /**
+ * Gets the n2 and n4 layer font.
+ * @return the n2 and n4 layer font
+ */
+ public Font getLayer2Font() {
+ return this.layer2Font;
+ }
+
+ /**
+ * Sets the n2 and n4 layer font. If the font size is zero, auto-fit will be used.
+ * @param layer2Font the n2 and n4 font
+ */
+ public void setLayer2Font(Font layer2Font) {
+ this.layer2Font = layer2Font;
+ }
+
+ /**
+ * Gets the Acrobat 6.0 layer mode.
+ * @return the Acrobat 6.0 layer mode
+ */
+ public boolean isAcro6Layers() {
+ return this.acro6Layers;
+ }
+
+ /**
+ * Acrobat 6.0 and higher recomends that only layer n2 and n4 be present. This method sets that mode.
+ * @param acro6Layers if <code>true</code> only the layers n2 and n4 will be present
+ */
+ public void setAcro6Layers(boolean acro6Layers) {
+ this.acro6Layers = acro6Layers;
+ }
+
+ /** Sets the run direction in the n2 and n4 layer.
+ * @param runDirection the run direction
+ */
+ public void setRunDirection(int runDirection) {
+ if (runDirection < PdfWriter.RUN_DIRECTION_DEFAULT || runDirection > PdfWriter.RUN_DIRECTION_RTL)
+ throw new RuntimeException("Invalid run direction: " + runDirection);
+ this.runDirection = runDirection;
+ }
+
+ /** Gets the run direction.
+ * @return the run direction
+ */
+ public int getRunDirection() {
+ return runDirection;
+ }
+
+ /**
+ * Getter for property signatureEvent.
+ * @return Value of property signatureEvent.
+ */
+ public SignatureEvent getSignatureEvent() {
+ return this.signatureEvent;
+ }
+
+ /**
+ * Sets the signature event to allow modification of the signature dictionary.
+ * @param signatureEvent the signature event
+ */
+ public void setSignatureEvent(SignatureEvent signatureEvent) {
+ this.signatureEvent = signatureEvent;
+ }
+
+ /**
+ * Gets the background image for the layer 2.
+ * @return the background image for the layer 2
+ */
+ public Image getImage() {
+ return this.image;
+ }
+
+ /**
+ * Sets the background image for the layer 2.
+ * @param image the background image for the layer 2
+ */
+ public void setImage(Image image) {
+ this.image = image;
+ }
+
+ /**
+ * Gets the scaling to be applied to the background image.
+ * @return the scaling to be applied to the background image
+ */
+ public float getImageScale() {
+ return this.imageScale;
+ }
+
+ /**
+ * Sets the scaling to be applied to the background image. If it's zero the image
+ * will fully fill the rectangle. If it's less than zero the image will fill the rectangle but
+ * will keep the proportions. If it's greater than zero that scaling will be applied.
+ * In any of the cases the image will always be centered. It's zero by default.
+ * @param imageScale the scaling to be applied to the background image
+ */
+ public void setImageScale(float imageScale) {
+ this.imageScale = imageScale;
+ }
+
+ /**
+ * Commands to draw a yellow question mark in a stream content
+ */
+ public static final String questionMark =
+ "% DSUnknown\n" +
+ "q\n" +
+ "1 G\n" +
+ "1 g\n" +
+ "0.1 0 0 0.1 9 0 cm\n" +
+ "0 J 0 j 4 M []0 d\n" +
+ "1 i \n" +
+ "0 g\n" +
+ "313 292 m\n" +
+ "313 404 325 453 432 529 c\n" +
+ "478 561 504 597 504 645 c\n" +
+ "504 736 440 760 391 760 c\n" +
+ "286 760 271 681 265 626 c\n" +
+ "265 625 l\n" +
+ "100 625 l\n" +
+ "100 828 253 898 381 898 c\n" +
+ "451 898 679 878 679 650 c\n" +
+ "679 555 628 499 538 435 c\n" +
+ "488 399 467 376 467 292 c\n" +
+ "313 292 l\n" +
+ "h\n" +
+ "308 214 170 -164 re\n" +
+ "f\n" +
+ "0.44 G\n" +
+ "1.2 w\n" +
+ "1 1 0.4 rg\n" +
+ "287 318 m\n" +
+ "287 430 299 479 406 555 c\n" +
+ "451 587 478 623 478 671 c\n" +
+ "478 762 414 786 365 786 c\n" +
+ "260 786 245 707 239 652 c\n" +
+ "239 651 l\n" +
+ "74 651 l\n" +
+ "74 854 227 924 355 924 c\n" +
+ "425 924 653 904 653 676 c\n" +
+ "653 581 602 525 512 461 c\n" +
+ "462 425 441 402 441 318 c\n" +
+ "287 318 l\n" +
+ "h\n" +
+ "282 240 170 -164 re\n" +
+ "B\n" +
+ "Q\n";
+
+ /**
+ * Holds value of property contact.
+ */
+ private String contact;
+
+ /**
+ * Holds value of property layer2Font.
+ */
+ private Font layer2Font;
+
+ /**
+ * Holds value of property layer4Text.
+ */
+ private String layer4Text;
+
+ /**
+ * Holds value of property acro6Layers.
+ */
+ private boolean acro6Layers;
+
+ /**
+ * Holds value of property runDirection.
+ */
+ private int runDirection = PdfWriter.RUN_DIRECTION_NO_BIDI;
+
+ /**
+ * Holds value of property signatureEvent.
+ */
+ private SignatureEvent signatureEvent;
+
+ /**
+ * Holds value of property image.
+ */
+ private Image image;
+
+ /**
+ * Holds value of property imageScale.
+ */
+ private float imageScale;
+
+ /**
+ *
+ */
+ private static class RangeStream extends InputStream {
+ private byte b[] = new byte[1];
+ private RandomAccessFile raf;
+ private byte bout[];
+ private int range[];
+ private int rangePosition = 0;
+
+ private RangeStream(RandomAccessFile raf, byte bout[], int range[]) {
+ this.raf = raf;
+ this.bout = bout;
+ this.range = range;
+ }
+
+ /**
+ * @see java.io.InputStream#read()
+ */
+ public int read() throws IOException {
+ int n = read(b);
+ if (n != 1)
+ return -1;
+ return b[0] & 0xff;
+ }
+
+ /**
+ * @see java.io.InputStream#read(byte[], int, int)
+ */
+ public int read(byte[] b, int off, int len) throws IOException {
+ if (b == null) {
+ throw new NullPointerException();
+ } else if ((off < 0) || (off > b.length) || (len < 0) ||
+ ((off + len) > b.length) || ((off + len) < 0)) {
+ throw new IndexOutOfBoundsException();
+ } else if (len == 0) {
+ return 0;
+ }
+ if (rangePosition >= range[range.length - 2] + range[range.length - 1]) {
+ return -1;
+ }
+ for (int k = 0; k < range.length; k += 2) {
+ int start = range[k];
+ int end = start + range[k + 1];
+ if (rangePosition < start)
+ rangePosition = start;
+ if (rangePosition >= start && rangePosition < end) {
+ int lenf = Math.min(len, end - rangePosition);
+ if (raf == null)
+ System.arraycopy(bout, rangePosition, b, off, lenf);
+ else {
+ raf.seek(rangePosition);
+ raf.readFully(b, off, lenf);
+ }
+ rangePosition += lenf;
+ return lenf;
+ }
+ }
+ return -1;
+ }
+ }
+
+ /**
+ * An interface to retrieve the signature dictionary for modification.
+ */
+ public interface SignatureEvent {
+ /**
+ * Allows modification of the signature dictionary.
+ * @param sig the signature dictionary
+ */
+ public void getSignatureDictionary(PdfDictionary sig);
+ }
+
+ /**
+ * Holds value of property certified.
+ */
+ private boolean certified;
+
+ /**
+ * Gets the certified status of this document.
+ * @return the certified status
+ */
+ public boolean isCertified() {
+ return this.certified;
+ }
+
+ /**
+ * Sets the document type to certified instead of simply signed. The certified document doesn't allow any changes.
+ * @param certified <code>true</code> to certify the document, <code>false</code> to just apply a simple signature
+ */
+ public void setCertified(boolean certified) {
+ this.certified = certified;
+ }
+}
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