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As such, it must be dynamically - loaded into the ORB. You must use a service configurator file to do this. - The service configurator options for the ORB are described in detail in <a href="http://cvs.doc.wustl.edu/viewcvs.cgi/*checkout*/TAO/docs/components.html?rev=HEAD&content-type=text/html"> - Options for TAO Components</a>. In this case you have to create a <code>svc.conf</code> - file that includes: </p> - <pre> - dynamic SSLIOP_Factory Service_Object * - TAO_SSLIOP:_make_TAO_SSLIOP_Protocol_Factory() "" - static Resource_Factory "<font color="#009900">-ORBProtocolFactory SSLIOP_Factory</font>"</pre> - <p>Note that "<code>TAO_SSLIOP:_make...</code>" is part of the first - line. This will load the SSLIOP protocol from the library called <code>TAO_SSL</code> - and then use that protocol in the ORB. The SSLIOP protocol has a number of - configuration options that we describe below. </p> - <h4>SSLIOP Options</h4> - <p>Once the SSLIOP protocol is loaded you may want to setup the private key - and certificate files, the authentication level and similar features. This - is done by setting more options in the service configurator file, for example: - </p> - <pre>dynamic SSLIOP_Factory Service_Object * - TAO_SSLIOP:_make_TAO_SSLIOP_Protocol_Factory()"<font color="#009900">-SSLAuthenticate SERVER</font>"</pre> - <p>will enforce validation of the server certificate on each SSL connection. - Note that "<code>TAO_SSLIOP:_make...</code>" is part of the first - line. The complete list of options is: </p> - <p> - <table border="2" cellspacing="2" cellpadding="0" align="center" width="100%" > - <tr> - <th>Option</th> - <th>Description</th> - </tr> - <tr> - <td><code>-SSLNoProtection</code></td> - <td> - <p>On the client side, this option forces request invocations to use the - standard insecure IIOP protocol.</p> - <p>On the server side, use of this option allows invocations on the server - to be made through the standard insecure IIOP protocol. Request invocations - through SSL may still be made.</p> - <p>This option will be deprecated once the <code>SecurityLevel2::SecurityManager</code> - interface as defined in the CORBA Security Service is implemented.</p> - </td> - </tr> - <tr> - <td><code>-SSLCertificate</code> <em>FORMAT:filename</em></td> - <td> Set the name of the file that contains the certificate for this process. - The file can be in Privacy Enhanced Mail (<code>PEM</code>) format or - ASN.1 (<code>ASN1</code>). Remember that the certificate must be signed - by a Certificate Authority recognized by the client. </td> - </tr> - <tr> - <td><code>-SSLPrivateKey</code> <em>FORMAT:filename</em></td> - <td> Set the name of the file that contains the private key for this process. - The private key and certificate files must match. It is extremely important - that you secure your private key! By default the <code>OpenSSL</code> - utilities will generate pass phrase protected private key files. The password - is prompted when you run the CORBA application. </td> - </tr> - <tr> - <td><code>-SSLAuthenticate</code> <em>which</em></td> - <td> Control the level of authentication. The argument can be <code>NONE</code>, - <code>SERVER</code>, <code>CLIENT</code> or <code>SERVER_AND_CLIENT</code>. - Due to limitations in the SSL protocol <code>CLIENT</code> implies that - the server is authenticated too. </td> - </tr> - <tr> - <td><code>-SSLAcceptTimeout</code> <em>which</em></td> - <td>Set the maximum amount of time to allow for establishing a - SSL/TLS passive connection, <em>i.e.</em> for accepting a - SSL/TLS connection. The default value is <code>10</code> - seconds. - <p>See the discussion in <a - href="http://deuce.doc.wustl.edu/bugzilla/show_bug.cgi?id=1348">Bug 1348</a> in our <a href="http://deuce.doc.wustl.edu/bugzilla/index.cgi">bug - tracking system</a> for the rationale behind this option.</td> - </tr> - <tr> - <td><code>-SSLDHParams</code> <em>filename</em></td> - <td>Set the filename containing the Diffie-Hellman parameters to - be used when using DSS-based certificates. The specified - file may be a file containing only Diffie-Hellman - parameters created by "<code>openssl dhparam</code>", or - it can be a certificate containing a PEM encoded set of - Diffie-Hellman parameters.</td> - </tr> - - </table> - <h4>Environment variables</h4> - <p>The SSLIOP protocol uses the following environment variables to control its - behavior. </p> - <p> - <table border="2" cellspacing="2" cellpadding="0" width="100%" > - <tr> - <th>Environment Variable</th> - <th>Description</th> - </tr> - <tr> - <td><code>SSL_CERT_FILE</code> <em>filename</em></td> - <td> The name of the file that contains all the trusted certificate authority - self-signed certificates. By default it is set to the value of the <code>ACE_DEFAULT_SSL_CERT_FILE</code> - macro. </td> - </tr> - <tr> - <td><code>SSL_CERT_DIR</code> <em>directory</em></td> - <td> The name of the directory that contains all the trusted certificate - authority self-signed certificates. By default it is set to the value - of the <code>ACE_DEFAULT_SSL_CERT_DIR</code> macro. This directory must - be indexed using the OpenSSL format, i.e. each certificate is aliased - with the following link: - <pre> -$ ln -s cacert.pem `openssl x509 -noout -hash < cacert.pem`.0 -</pre> - Consult the documentation of your SSL implementation for more details. - </td> - <tr> - <td><code>SSL_EGD_FILE </code><em>filename</em></td> - <td>The name of the UNIX domain socket that the <a href="http://www.lothar.com/tech/crypto/">Entropy - Gathering Daemon (EGD)</a> is listening on.</td> - <tr> - <td><code>SSL_RAND_FILE </code><em>filename</em></td> - <td>The file that contains previously saved state from OpenSSL's pseudo-random - number generator.</td> - </table> - <hr> - <h3><a name="ssliop_current"></a>Using the <code>SSLIOP::Current</code> Object</h3> - <p></p> - <p>TAO's SSLIOP pluggable protocol allows an application to gain access to the - SSL session state for the current request. For example, it allows an application - to obtain the SSL peer certificate chain associated with the current request - so that the application can decide whether or not to reject the request. This - is achieved by invoking certain operations on the <code>SSLIOP::Current</code> - object. The interface for <code>SSLIOP::Current</code> object is:</p> - <p><code>module <b>SSLIOP</b> {</code></p> - <p><code><font color="#0000FF"># pragma prefix</font> "<font color="#009900">omg.org</font>"</code></p> - <blockquote> - <p><code> <font color="#FF0000">/// A <b>DER</b> encoded X.509 certificate.</font><br> - typedef sequence<octet> ASN_1_Cert;</code></p> - <p><code> <font color="#FF0000">/// A chain of <b>DER</b> encoded X.509 certificates. - The chain<br> - /// is actually a sequence. The sender's certificate is<br> - /// first, followed by any Certificate Authority<br> - /// certificates proceeding sequentially upward.</font><br> - typedef sequence<ASN_1_Cert> SSL_Cert;</code></p> - </blockquote> - <p><code> <font color="#FF0000">/// The following are TAO - extensions.</font><br> - <font color="#0000FF"># pragma prefix</font> "<font color="#009900">ssliop.tao</font>"</code></p> - <blockquote> - <p><code> <font color="#FF0000">/// The SSLIOP::Current interface provides - methods to<br> - /// gain access to the SSL session state for the current<br> - /// execution context.</font><br> - local interface <b>Current</b> : CORBA::Current {</code> </p> - <blockquote> - <p><code> <font color="#FF0000">/// Exception that indicates a SSLIOP::Current<br> - /// operation was invoked outside of an SSL<br> - /// session.</font><br> - exception NoContext {};</code></p> - <p><code> <font color="#FF0000">/// Return the certificate chain associated - with<br> - /// the current execution context. If no SSL<br> - /// session is being used for the request or<br> - /// upcall, then the NoContext exception is<br> - /// raised.</font><br> - SSL_Cert get_peer_certificate_chain ()<br> - raises - (N</code><code>oContext);</code></p> - </blockquote> - <p><code>};</code></p> - </blockquote> - <p><code> <font color="#0000FF"># pragma prefix</font> "<font color="#009900">omg.org</font>"</code></p> - <p><code>};</code></p> - <h4>Obtaining a Reference to the <code>SSLIOP::Current</code> Object</h4> - <p>A reference to the <code>SSLIOP::Current</code> object may be obtained using - the standard <code>CORBA::ORB::resolve_initial_references</code> mechanism - with the argument <code>"<font color="#009900">SSLIOPCurrent</font>"</code>. - Here is an example:</p> - <blockquote> - <p><code>int argc = 0;</code></p> - <p><code>CORBA::ORB_var orb =<br> - CORBA::ORB_init (argc, "", "<font color="#009900">my_orb</font>");</code></p> - <p><code>CORBA::Object_var obj =<br> - orb->resolve_initial_references ("<font color="#009900">SSLIOPCurrent</font>");</code></p> - <p><code><b>SSLIOP</b>::<b>Current_var</b> ssliop =<br> - <b>SSLIOP</b>::<b>Current</b>::_narrow (obj.in ());</code></p> - </blockquote> - <h4>Examining the Peer Certificate for the Current Request Using <a href="http://www.openssl.org/">OpenSSL</a></h4> - <p>Once a reference to the <code>SSLIOP::Current</code> object has been retrieved, - the peer certificate for the current request may be obtained by invoking the - <code>SSLIOP::get_peer_certificate</code> method, as follows:</p> - <blockquote> - <p><code><font color="#FF0000">// This method can throw a <b>SSLIOP::Current::NoContext</b><br> - // exception if it is not invoked during a request being<br> - // performed over SSL.</font><br> - <b>SSLIOP::ASN_1_Cert_var</b> cert =<br> - ssliop->get_peer_certificate ();</code></p> - </blockquote> - <p>The retrieved X.509 peer certificate is in DER (a variant of ASN.1) format. - DER is the on-the-wire format used to transmit certificates between peers. - </p> - <p> OpenSSL can be used to examine the certificate. For example, to extract - and display the certificate issuer from the DER encoded X.509 certificate, - the following can be done:</p> - <blockquote> - <p><code><font color="#0000FF">#include</font> <<font color="#009900">openssl/x509.h</font>><br> - <font color="#0000FF">#include</font> <<font color="#009900">iostream</font>></code><code><br> - <font color="#FF0000">.<br> - .<br> - .</font> <br> - <font color="#FF0000">// Obtain the underlying buffer from the<br> - // SSLIOP::ASN_1_Cert.</font><br> - CORBA::Octet *der_cert = cert->get_buffer ();<br> - <br> - char buf[BUFSIZ];<br> - <br> - <font color="#FF0000">// Convert the DER encoded X.509 certificate into<br> - // OpenSSL's internal format.</font><br> - <b>X509</b> *peer = ::<b>d2i_X509</b> (0, &der_cert, cert->length ());<br> - <br> - ::<b>X509_NAME_oneline</b> (<br> - ::<b>X509_get_issuer_name</b> (peer),<br> - buf,<br> - BUFSIZ);<br> - <br> - std::cout << "<font color="#009900">Certificate issuer: </font>" - << buf << endl;<br> - <br> - ::<b>X509_free</b> (peer);</code></p> - </blockquote> - <p> </p> - <address></address> - <table width="100%" border="0"> - <tr> - <td> - <p><font face="Georgia, Times New Roman, Times, serif"><font face="Arial, Helvetica, sans-serif"><a href="mailto:ossama@dre.vanderbilt.edu">Ossama - Othman<br> - </a></font></font><font face="Georgia, Times New Roman, Times, serif"><a href="mailto:coryan@uci.edu"><font face="Arial, Helvetica, sans-serif">Carlos - O'Ryan</font></a><font face="Arial, Helvetica, sans-serif"> </font></font></p> - </td> - <td><a href="http://www.openssl.org/"><img src="images/openssl_button.gif" width="102" height="47" align="right" border="0"></a></td> - </tr> - </table> - <h2> </h2> - <!-- #EndEditable --></div> -<div id="Layer1" style="position:absolute; left:87px; top:162px; width:153px; height:373px; z-index:4"><!-- Image with table --> - <table border="0" cellpadding="0" cellspacing="0" width="158"> - <!-- fwtable fwsrc="Untitled" fwbase="nav_bar.gif" --> - <tr> <!-- Shim row, height 1. --> - 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