Java tutorial
/* Copyright 2016 Nationale-Nederlanden Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package nl.nn.adapterframework.ldap; import java.util.Hashtable; import javax.naming.CommunicationException; import javax.naming.Context; import javax.naming.NamingException; import javax.naming.directory.Attribute; import javax.naming.directory.DirContext; import javax.naming.directory.InitialDirContext; import javax.naming.ldap.InitialLdapContext; import nl.nn.adapterframework.configuration.ConfigurationException; import nl.nn.adapterframework.core.IPipeLineSession; import nl.nn.adapterframework.core.ParameterException; import nl.nn.adapterframework.core.PipeForward; import nl.nn.adapterframework.core.PipeRunException; import nl.nn.adapterframework.core.PipeRunResult; import nl.nn.adapterframework.parameters.ParameterResolutionContext; import nl.nn.adapterframework.parameters.ParameterValueList; import nl.nn.adapterframework.pipes.FixedForwardPipe; import nl.nn.adapterframework.util.CredentialFactory; import nl.nn.adapterframework.webcontrol.DummySSLSocketFactory; import org.apache.commons.lang.StringUtils; /** * Pipe that checks if a specified dn exists as 'member' in another specified dn * in LDAP. * * @author Peter Leeuwenburgh */ public class LdapFindMemberPipe extends FixedForwardPipe { private String authAlias; private String userName; private String password; private String host; private int port = -1; private boolean useSsl = false; private String dnSearchIn; private String dnFind; private boolean recursiveSearch = true; private String notFoundForwardName = "notFound"; private String exceptionForwardName = null; private CredentialFactory cf; protected PipeForward notFoundForward; protected PipeForward exceptionForward; public void configure() throws ConfigurationException { super.configure(); if (getHost() == null) { throw new ConfigurationException(getLogPrefix(null) + "host must be set"); } cf = new CredentialFactory(getAuthAlias(), getUserName(), getPassword()); if (StringUtils.isNotEmpty(getNotFoundForwardName())) { notFoundForward = findForward(getNotFoundForwardName()); } if (StringUtils.isNotEmpty(getExceptionForwardName())) { exceptionForward = findForward(getExceptionForwardName()); } } public PipeRunResult doPipe(Object input, IPipeLineSession session) throws PipeRunException { if (exceptionForward != null) { try { return doPipeWithException(input, session); } catch (Throwable t) { log.warn(getLogPrefix(session) + "exception occured, forwarding to exception-forward [" + exceptionForward.getPath() + "], exception:\n", t); return new PipeRunResult(exceptionForward, input); } } else { return doPipeWithException(input, session); } } public PipeRunResult doPipeWithException(Object input, IPipeLineSession session) throws PipeRunException { String dnSearchIn_work; String dnFind_work; ParameterValueList pvl = null; if (getParameterList() != null) { ParameterResolutionContext prc = new ParameterResolutionContext((String) input, session); try { pvl = prc.getValues(getParameterList()); } catch (ParameterException e) { throw new PipeRunException(this, getLogPrefix(session) + "exception on extracting parameters", e); } } dnSearchIn_work = getParameterValue(pvl, "dnSearchIn"); if (dnSearchIn_work == null) { dnSearchIn_work = getDnSearchIn(); } dnFind_work = getParameterValue(pvl, "dnFind"); if (dnFind_work == null) { dnFind_work = getDnFind(); } boolean found = false; if (StringUtils.isNotEmpty(dnSearchIn_work) && StringUtils.isNotEmpty(dnFind_work)) { try { found = findMember(getHost(), getPort(), dnSearchIn_work, isUseSsl(), dnFind_work, isRecursiveSearch()); } catch (NamingException e) { throw new PipeRunException(this, getLogPrefix(session) + "exception on ldap lookup", e); } } if (!found) { String msg = getLogPrefix(session) + "dn [" + dnFind_work + "] not found as member in url [" + retrieveUrl(getHost(), getPort(), dnSearchIn_work, isUseSsl()) + "]"; if (notFoundForward == null) { throw new PipeRunException(this, msg); } else { log.info(msg); return new PipeRunResult(notFoundForward, input); } } return new PipeRunResult(getForward(), input); } private boolean findMember(String host, int port, String dnSearchIn, boolean useSsl, String dnFind, boolean recursiveSearch) throws NamingException { Hashtable env = new Hashtable(); env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory"); String provUrl = retrieveUrl(host, port, dnSearchIn, useSsl); env.put(Context.PROVIDER_URL, provUrl); if (StringUtils.isNotEmpty(cf.getUsername())) { env.put(Context.SECURITY_AUTHENTICATION, "simple"); env.put(Context.SECURITY_PRINCIPAL, cf.getUsername()); env.put(Context.SECURITY_CREDENTIALS, cf.getPassword()); } else { env.put(Context.SECURITY_AUTHENTICATION, "none"); } DirContext ctx = null; try { try { ctx = new InitialDirContext(env); } catch (CommunicationException e) { log.info("Cannot create constructor for DirContext (" + e.getMessage() + "], will try again with dummy SocketFactory"); env.put("java.naming.ldap.factory.socket", DummySSLSocketFactory.class.getName()); ctx = new InitialLdapContext(env, null); } Attribute attrs = ctx.getAttributes("").get("member"); if (attrs != null) { boolean found = false; for (int i = 0; i < attrs.size() && !found; i++) { String dnFound = (String) attrs.get(i); if (dnFound.equalsIgnoreCase(dnFind)) { found = true; } else { if (recursiveSearch) { found = findMember(host, port, dnFound, useSsl, dnFind, recursiveSearch); } } } return found; } } finally { if (ctx != null) { try { ctx.close(); } catch (NamingException e) { log.warn("Exception closing DirContext", e); } } } return false; } private String retrieveUrl(String host, int port, String dnSearchIn, boolean useSsl) { String s = useSsl ? "ldaps://" : "ldap://"; String h = (host != null) ? host : ""; String p = (port != -1) ? (":" + port) : ""; String d = (dnSearchIn != null) ? ("/" + dnSearchIn.replaceAll("\\s", "%20")) : ""; return s + h + p + d; } public String getAuthAlias() { return authAlias; } public void setAuthAlias(String string) { authAlias = string; } public String getUserName() { return userName; } public void setUserName(String string) { userName = string; } public String getPassword() { return password; } public void setPassword(String string) { password = string; } public String getHost() { return host; } public void setHost(String string) { host = string; } public int getPort() { return port; } public void setPort(int i) { port = i; } public boolean isUseSsl() { return useSsl; } public void setUseSsl(boolean b) { useSsl = b; } public String getDnSearchIn() { return dnSearchIn; } public void setDnSearchIn(String string) { dnSearchIn = string; } public String getDnFind() { return dnFind; } public void setDnFind(String string) { dnFind = string; } public boolean isRecursiveSearch() { return recursiveSearch; } public void setRecursiveSearch(boolean b) { recursiveSearch = b; } public String getNotFoundForwardName() { return notFoundForwardName; } public void setNotFoundForwardName(String string) { notFoundForwardName = string; } public String getExceptionForwardName() { return exceptionForwardName; } public void setExceptionForwardName(String string) { exceptionForwardName = string; } }