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Figure 15 3. The first screen of output from the openSSLDemo.php script That s a lot of output, but the important thing is that everything worked: we generated a passwordprotected private key and a self-signed certificate, and then used them in several cryptographic operations involving the RSA algorithm. In practice, of course, these operations would be split between the sender and the recipient of some message, or the writer and reader of some file or database record. We turn now to the actual openSSL.php class used in the preceding example, the full code for which may be found also in the 15 folder of the downloadable archive of code for Pro PHP Security at http://www.apress.com. Again, because this class is long and complex, we ll outline it to orient you before we look at the actual code: 1. 2. 3. 4. Private variables construct() method: unneeded here makeKeys() method: creates and stores keys and certificates privateKey() and certificate() methods: get and set keys

Listing 2-1. ShopServlet.java - init Method public void init(ServletConfig config) throws ServletException { System.out.println("*** initializing controller servlet."); super.init(config); DataManager dataManager = new DataManager(); dataManager.setDbUrl(config.getInitParameter("dbUrl")); dataManager.setDbUserName(config.getInitParameter("dbUserName")); dataManager.setDbPassword(config.getInitParameter("dbPassword")); ServletContext context = config.getServletContext(); context.setAttribute("base", config.getInitParameter("base")); context.setAttribute("imageUrl", config.getInitParameter("imageUrl")); context.setAttribute("dataManager", dataManager); try { // load the database JDBC driver Class.forName(config.getInitParameter("jdbcDriver")); } catch (ClassNotFoundException e) { System.out.println(e.toString()); } } As you can see, the initialization consists of three main activities: instantiating and configuring the data manager, saving some parameters for later use by the JSP pages, and loading the driver necessary to access the database. (In the code, JDBC stands for Java Database Connectivity.) Notice that all these activities are done by setting attributes to values obtained through this method: config.getInitParameter("init-parameter-name") These values are stored in the WEB-INF\web.xml file, as shown in Listing 2-2. Listing 2-2. Extracted from web.xml <web-app ...> ... <servlet> ... <init-param> <param-name>dbUrl</param-name> <param-value>jdbc:mysql://localhost:3306/shop</param-value> </init-param> ... </servlet> ... </web-app>

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In addition, by default the selected skin is also applied to the input related HTML elements such as <a> or <input> generated by normal JSF components. However, it is not applied to others such as <span>. To make sure the whole page uses the skin, group every thing into a <rich:panel> as shown in Listing 7 16. This way, everything inside that panel will inherit its CSS styles. Listing 7 16. Grouping Everything into a <rich:panel>

5. 6. 7.

By defining the critical initialization parameters in web.xml, you can change the parameters without having to modify the application code. Table 2-3 shows the initialization parameters defined for this application. Table 2-3. Servlet Initialization Parameters

encrypt() and decrypt() methods: carry out encryption and decryption of message sign() and verify() methods: vouch for authenticity of message and signature getCommonName(), getDN(), getCACommonName(), and getCA() methods: introspection methods to read certificate contents

<!DOCTYPE ...> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:rich="http://richfaces.org/rich"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Insert title here</title> </head> <body> <rich:panel>

For ease of use, we didn t make the database password-protected, but this is obviously something you d want to do in real life. Tomcat makes available to JSP the same servlet context that ShopServlet.java obtains by executing the method config.getServletContext(). For example, the attribute stored with context.setAttribute("imageUrl", ...) from within the servlet is available to JSP pages as the value returned by the method application.getAttribute("imageUrl").

We turn now to the code itself: < php class openSSL { private $certificate; private $privatekey; private $dn = array(); private $x509 = array(); private $sigheader = "\n-----BEGIN openSSL.php SIGNATURE-----\n"; private $sigfooter = "-----END openSSL.php SIGNATURE-----\n"; // constructor public function __construct() { // no constructor is needed here } // make new keys and load them into $this->certificate and $this->privatekey // certificate will be self-signed public function makeKeys ( $distinguishedName, $passphrase = NULL ) { // keep track of the distinguished name $this->dn = $distinguishedName; // generate the pem-encoded private key $config = array( 'digest_alg'=>'sha1', 'private_key_bits'=>1024, 'encrypt_key'=>TRUE, ); $key = openssl_pkey_new( $config ); // generate the certificate signing request... $csr = openssl_csr_new( $this->dn, $key, $config ); // and use it to make a self-signed certificate $cert = openssl_csr_sign( $csr, NULL, $key, 365, $config, time() ); // export private and public keys openssl_pkey_export( $key, $this->privatekey, $passphrase, $config ); openssl_x509_export( $cert, $this->certificate ); // parse certificate $this->x509 = openssl_x509_parse( $cert ); return TRUE; // end of makeKeys() method } // openSSL class continues

<h:form> <a4j:commandLink action="#{faqService.trigger}" value="#{faqService.questionText} (#{faqService.rating})" reRender="p" id="q" /> <a href="javascript:Richfaces.showModalPanel('myDialog')">Rate</a> </h:form> <rich:modalPanel id="myDialog" width="200" height="140"> <f:facet name="header"> <h:outputText value="Enter a rating"></h:outputText> </f:facet> <h:panelGroup id="mp"> <h:messages id="m" /> </h:panelGroup> <h:form style="float:right"> <h:inputText size="2" value="#{faqService.rating}"/> <a4j:commandButton value="Rate" action="#{faqService.rate}" reRender="q,mp" oncomplete="if (document.getElementById('m')==null) Richfaces.hideModalPanel('myDialog')"> </a4j:commandButton> </h:form> </rich:modalPanel> <br /> <h:panelGroup id="p"> <h:outputText value="#{faqService.answerText}" id="a" rendered="#{faqService.showingAnswer}" /> </h:panelGroup> </rich:panel> </body> </html>

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