Java tutorial
/* Copyright (C) 2007-20013 BlueXML - www.bluexml.com This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.bluexml.side.Framework.alfresco.signature.repo.action.executer; import java.io.File; import java.io.FileOutputStream; import java.security.KeyStore; import java.security.PrivateKey; import java.security.cert.Certificate; import java.util.ArrayList; import java.util.List; import org.alfresco.model.ContentModel; import org.alfresco.repo.action.ParameterDefinitionImpl; import org.alfresco.service.cmr.action.Action; import org.alfresco.service.cmr.action.ParameterDefinition; import org.alfresco.service.cmr.dictionary.DataTypeDefinition; import org.alfresco.service.cmr.repository.ContentReader; import org.alfresco.service.cmr.repository.ContentWriter; import org.alfresco.service.cmr.repository.NodeRef; import org.alfresco.util.TempFileProvider; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.PdfSignatureAppearance; import com.itextpdf.text.pdf.PdfStamper; public class PDFSignatureActionExecuter extends BasePDFStampActionExecuter { /** * The logger */ private static Log logger = LogFactory.getLog(PDFSignatureActionExecuter.class); /** * Action constants */ public static final String NAME = "pdf-signature"; public static final String PARAM_PRIVATE_KEY = "private-key"; public static final String PARAM_DESTINATION_FOLDER = "destination-folder"; public static final String PARAM_VISIBILITY = "visibility"; public static final String PARAM_LOCATION = "location"; public static final String PARAM_REASON = "reason"; public static final String PARAM_KEY_PASSWORD = "key-password"; public static final String PARAM_WIDTH = "width"; public static final String PARAM_HEIGHT = "height"; public static final String PARAM_KEY_TYPE = "key-type"; public static final String PARAM_EXCEPTION = "exception"; public static final String PARAM_SIGNED_NAME = "signed-name"; //Aditional parameters to accessing the keystore file public static final String PARAM_ALIAS = "alias"; public static final String PARAM_STORE_PASSWORD = "store-password"; public static final String VISIBILITY_HIDDEN = "hidden"; public static final String VISIBILITY_VISIBLE = "visible"; public static final String KEY_TYPE_PKCS12 = "pkcs12"; public static final String KEY_TYPE_DEFAULT = "default"; /** * Add parameter definitions */ @Override protected void addParameterDefinitions(List<ParameterDefinition> paramList) { super.addParameterDefinitions(paramList); paramList.add(new ParameterDefinitionImpl(PARAM_DESTINATION_FOLDER, DataTypeDefinition.NODE_REF, true, getParamDisplayLabel(PARAM_DESTINATION_FOLDER))); paramList.add(new ParameterDefinitionImpl(PARAM_PRIVATE_KEY, DataTypeDefinition.NODE_REF, false, getParamDisplayLabel(PARAM_PRIVATE_KEY))); } /** * @see org.alfresco.repo.action.executer.ActionExecuterAbstractBase#executeImpl(org.alfresco.service.cmr.repository.NodeRef, * org.alfresco.service.cmr.repository.NodeRef) */ protected void executeImpl(Action ruleAction, NodeRef actionedUponNodeRef) { @SuppressWarnings("unchecked") ArrayList<String> myException = (ArrayList<String>) ruleAction.getParameterValue(PARAM_EXCEPTION); ContentReader actionedUponContentReader = getReader(actionedUponNodeRef); if (actionedUponContentReader != null) { // Add the signature to the PDF try { doSignature(ruleAction, actionedUponNodeRef, actionedUponContentReader); } catch (Exception e) { myException.add("Error on document " + actionedUponNodeRef.getStoreRef() + "/" + actionedUponNodeRef.getId()); } { if (logger.isDebugEnabled()) { logger.debug("Can't execute rule: \n" + " node: " + actionedUponNodeRef + "\n" + " reader: " + actionedUponContentReader + "\n" + " action: " + this); } } } } /** * * @param ruleAction * @param actionedUponNodeRef * @param actionedUponContentReader * @throws Exception */ protected void doSignature(Action ruleAction, NodeRef actionedUponNodeRef, ContentReader actionedUponContentReader) throws Exception { NodeRef privateKey = (NodeRef) ruleAction.getParameterValue(PARAM_PRIVATE_KEY); String location = (String) ruleAction.getParameterValue(PARAM_LOCATION); String reason = (String) ruleAction.getParameterValue(PARAM_REASON); String visibility = (String) ruleAction.getParameterValue(PARAM_VISIBILITY); String keyPassword = (String) ruleAction.getParameterValue(PARAM_KEY_PASSWORD); String keyType = (String) ruleAction.getParameterValue(PARAM_KEY_TYPE); String signedName = (String) ruleAction.getParameterValue(PARAM_SIGNED_NAME); int height = Integer.parseInt((String) ruleAction.getParameterValue(PARAM_HEIGHT)); int width = Integer.parseInt((String) ruleAction.getParameterValue(PARAM_WIDTH)); // New keystore parameters String alias = (String) ruleAction.getParameterValue(PARAM_ALIAS); String storePassword = (String) ruleAction.getParameterValue(PARAM_STORE_PASSWORD); // Ugly and verbose, but fault-tolerant String locationXStr = (String) ruleAction.getParameterValue(PARAM_LOCATION_X); String locationYStr = (String) ruleAction.getParameterValue(PARAM_LOCATION_Y); int locationX = 0; int locationY = 0; try { locationX = locationXStr != null ? Integer.parseInt(locationXStr) : 0; } catch (NumberFormatException e) { locationX = 0; } try { locationY = locationXStr != null ? Integer.parseInt(locationYStr) : 0; } catch (NumberFormatException e) { locationY = 0; } File tempDir = null; ContentWriter writer = null; KeyStore ks = null; try { // get a keystore instance by if (keyType == null || keyType.equalsIgnoreCase(KEY_TYPE_DEFAULT)) { ks = KeyStore.getInstance(KeyStore.getDefaultType()); } else if (keyType.equalsIgnoreCase(KEY_TYPE_PKCS12)) { ks = KeyStore.getInstance("pkcs12"); } else { throw new Exception("Unknown key type " + keyType + " specified"); } // open the reader to the key and load it ContentReader keyReader = serviceRegistry.getContentService().getReader(privateKey, ContentModel.PROP_CONTENT); ks.load(keyReader.getContentInputStream(), storePassword.toCharArray()); // set alias // String alias = (String) ks.aliases().nextElement(); PrivateKey key = (PrivateKey) ks.getKey(alias, keyPassword.toCharArray()); Certificate[] chain = ks.getCertificateChain(alias); //open original pdf ContentReader pdfReader = getReader(actionedUponNodeRef); PdfReader reader = new PdfReader(pdfReader.getContentInputStream()); // create temp dir to store file File alfTempDir = TempFileProvider.getTempDir(); tempDir = new File(alfTempDir.getPath() + File.separatorChar + actionedUponNodeRef.getId()); tempDir.mkdir(); File file = new File(tempDir, serviceRegistry.getFileFolderService().getFileInfo(actionedUponNodeRef).getName()); FileOutputStream fout = new FileOutputStream(file); PdfStamper stamp = PdfStamper.createSignature(reader, fout, '\0'); PdfSignatureAppearance sap = stamp.getSignatureAppearance(); sap.setCrypto(key, chain, null, PdfSignatureAppearance.WINCER_SIGNED); // set reason for signature and location of signer sap.setReason(reason); sap.setLocation(location); if (visibility.equalsIgnoreCase(PDFSignatureActionExecuter.VISIBILITY_VISIBLE)) { sap.setVisibleSignature(new Rectangle(locationX + width, locationY - height, locationX, locationY), 1, null); } stamp.close(); String[] splitedFilename = file.getName().split("\\."); String name = "-" + signedName + "." + splitedFilename[splitedFilename.length - 1]; for (int i = splitedFilename.length - 2; i >= 0; i--) { if (name.equals("-" + signedName + "." + splitedFilename[splitedFilename.length - 1])) { name = splitedFilename[i] + name; } else { name = splitedFilename[i] + "." + name; } } writer = getWriter(name, (NodeRef) ruleAction.getParameterValue(PARAM_DESTINATION_FOLDER)); writer.setEncoding(actionedUponContentReader.getEncoding()); writer.setMimetype(FILE_MIMETYPE); writer.putContent(file); file.delete(); } catch (Exception e) { throw e; } finally { if (tempDir != null) { try { tempDir.delete(); } catch (Exception ex) { } } } } }