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, 0 insertions, 1349 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java b/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java deleted file mode 100644 index 52b186c..0000000 --- a/src/main/java/com/lowagie/text/pdf/PdfSignatureAppearance.java +++ /dev/null @@ -1,1349 +0,0 @@ -/*
- * 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;
- }
-}
|