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r44 r134 1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 45. LDAP and Transport Layer Security</title><link rel="stylesheet" href=" samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.71.0"><link rel="start" href="index.html" title="The Official Samba-3 HOWTO and Reference Guide"><link rel="up" href="Appendix.html" title="Part VI. Reference Section"><link rel="prev" href="speed.html" title="Chapter 44. Samba Performance Tuning"><link rel="next" href="ch46.html" title="Chapter 46. Samba Support"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 45. LDAP and Transport Layer Security</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="speed.html">Prev</a> </td><th width="60%" align="center">Part VI. Reference Section</th><td width="20%" align="right"> <a accesskey="n" href="ch46.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="ch-ldap-tls"></a>Chapter 45. LDAP and Transport Layer Security</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Gavin</span> <span class="surname">Henry</span></h3><div class="affiliation"><span class="orgname">Suretec Systems Limited, UK<br></span><div class="address"><p><code class="email"><<ahref="mailto:ghenry@suretecsystems.com">ghenry@suretecsystems.com</a>></code></p></div></div></div></div><div><p class="pubdate">July 8, 2005</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-intro-ldap-tls">Introduction</a></span></dt><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-config-ldap-tls">Configuring</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-certs">Generating the Certificate Authority</a></span></dt><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-server">Generating the Server Certificate</a></span></dt><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-install">Installing the Certificates</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-test-ldap-tls">Testing</a></span></dt><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-int-ldap-tls">Troubleshooting</a></span></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="s1-intro-ldap-tls"></a>Introduction</h2></div></div></div><p>2 <a class="indexterm" name="id4 45630"></a>3 <a class="indexterm" name="id4 45639"></a>1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 45. LDAP and Transport Layer Security</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="The Official Samba 3.2.x HOWTO and Reference Guide"><link rel="up" href="Appendix.html" title="Part VI. Reference Section"><link rel="prev" href="speed.html" title="Chapter 44. Samba Performance Tuning"><link rel="next" href="ch46.html" title="Chapter 46. Samba Support"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 45. LDAP and Transport Layer Security</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="speed.html">Prev</a> </td><th width="60%" align="center">Part VI. Reference Section</th><td width="20%" align="right"> <a accesskey="n" href="ch46.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="ch-ldap-tls"></a>Chapter 45. LDAP and Transport Layer Security</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Gavin</span> <span class="surname">Henry</span></h3><div class="affiliation"><span class="orgname">Suretec Systems Limited, UK<br></span><div class="address"><p><code class="email"><<a class="email" href="mailto:ghenry@suretecsystems.com">ghenry@suretecsystems.com</a>></code></p></div></div></div></div><div><p class="pubdate">July 8, 2005</p></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-intro-ldap-tls">Introduction</a></span></dt><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-config-ldap-tls">Configuring</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-certs">Generating the Certificate Authority</a></span></dt><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-server">Generating the Server Certificate</a></span></dt><dt><span class="sect2"><a href="ch-ldap-tls.html#s1-config-ldap-tls-install">Installing the Certificates</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-test-ldap-tls">Testing</a></span></dt><dt><span class="sect1"><a href="ch-ldap-tls.html#s1-int-ldap-tls">Troubleshooting</a></span></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="s1-intro-ldap-tls"></a>Introduction</h2></div></div></div><p> 2 <a class="indexterm" name="id469768"></a> 3 <a class="indexterm" name="id469778"></a> 4 4 Up until now, we have discussed the straightforward configuration of <span class="trademark">OpenLDAP</span>™, 5 5 with some advanced features such as ACLs. This does not however, deal with the fact that the network … … 7 7 comes in. 8 8 </p><p> 9 <a class="indexterm" name="id4 45661"></a>9 <a class="indexterm" name="id469799"></a> 10 10 <span class="trademark">OpenLDAP</span>™ clients and servers are capable of using the Transport Layer Security (TLS) 11 framework to provide integrity and confidentiality protections in accordance with <a href="http://rfc.net/rfc2830.html" target="_top">RFC 2830</a>; <span class="emphasis"><em>Lightweight Directory Access Protocol (v3):11 framework to provide integrity and confidentiality protections in accordance with <a class="ulink" href="http://rfc.net/rfc2830.html" target="_top">RFC 2830</a>; <span class="emphasis"><em>Lightweight Directory Access Protocol (v3): 12 12 Extension for Transport Layer Security.</em></span> 13 13 </p><p> 14 <a class="indexterm" name="id4 45688"></a>14 <a class="indexterm" name="id469826"></a> 15 15 TLS uses X.509 certificates. All servers are required to have valid certificates, whereas client certificates 16 16 are optional. We will only be discussing server certificates. 17 17 </p><div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Tip</h3><p> 18 <a class="indexterm" name="id4 45701"></a>19 <a class="indexterm" name="id4 45707"></a>20 <a class="indexterm" name="id4 45714"></a>18 <a class="indexterm" name="id469839"></a> 19 <a class="indexterm" name="id469846"></a> 20 <a class="indexterm" name="id469852"></a> 21 21 The DN of a server certificate must use the CN attribute to name the server, and the CN must carry the 22 22 server's fully qualified domain name (FQDN). Additional alias names and wildcards may be present in the 23 <code class="option">subjectAltName</code> certificate extension. More details on server certificate names are in <a href="http://rfc.net/rfc2830.html" target="_top">RFC2830</a>.23 <code class="option">subjectAltName</code> certificate extension. More details on server certificate names are in <a class="ulink" href="http://rfc.net/rfc2830.html" target="_top">RFC2830</a>. 24 24 </p></div><p> 25 25 We will discuss this more in the next sections. 26 26 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="s1-config-ldap-tls"></a>Configuring</h2></div></div></div><p> 27 <a class="indexterm" name="id4 45750"></a>27 <a class="indexterm" name="id469888"></a> 28 28 Now on to the good bit. 29 29 </p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="s1-config-ldap-tls-certs"></a>Generating the Certificate Authority</h3></div></div></div><p> 30 <a class="indexterm" name="id4 45773"></a>30 <a class="indexterm" name="id469911"></a> 31 31 In order to create the relevant certificates, we need to become our own Certificate Authority (CA). 32 <sup>[<a name="id4 45783" href="#ftn.id445783">8</a>]</sup> This is necessary, so we can sign the server certificate.33 </p><p> 34 <a class="indexterm" name="id4 45810"></a>35 We will be using the <a href="http://www.openssl.org" target="_top">OpenSSL</a> <sup>[<a name="id445822" href="#ftn.id445822">9</a>]</sup> software for this, which is included with every great <span class="trademark">Linux</span>® distribution.36 </p><p> 37 TLS is used for many types of servers, but the instructions<sup>[<a name="id4 45838" href="#ftn.id445838">10</a>]</sup> presented here, are tailored for <span class="application">OpenLDAP</span>.32 <sup>[<a name="id469921" href="#ftn.id469921" class="footnote">8</a>]</sup> This is necessary, so we can sign the server certificate. 33 </p><p> 34 <a class="indexterm" name="id469948"></a> 35 We will be using the <a class="ulink" href="http://www.openssl.org" target="_top">OpenSSL</a> <sup>[<a name="id469961" href="#ftn.id469961" class="footnote">9</a>]</sup> software for this, which is included with every great <span class="trademark">Linux</span>® distribution. 36 </p><p> 37 TLS is used for many types of servers, but the instructions<sup>[<a name="id469977" href="#ftn.id469977" class="footnote">10</a>]</sup> presented here, are tailored for <span class="application">OpenLDAP</span>. 38 38 </p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> 39 39 The <span class="emphasis"><em>Common Name (CN)</em></span>, in the following example, <span class="emphasis"><em>MUST</em></span> be … … 52 52 </code> 53 53 </pre><p> 54 Now generate the CA:<sup>[<a name="id4 45910" href="#ftn.id445910">11</a>]</sup>54 Now generate the CA:<sup>[<a name="id470049" href="#ftn.id470049" class="footnote">11</a>]</sup> 55 55 </p><pre class="screen"> 56 56 <code class="computeroutput"> … … 208 208 </pre><p> 209 209 </p><p> 210 That's all there is to it. Now on to <a href="ch-ldap-tls.html#s1-test-ldap-tls" title="Testing">the section called “Testing”</a>210 That's all there is to it. Now on to <a class="xref" href="ch-ldap-tls.html#s1-test-ldap-tls" title="Testing">the section called “Testing”</a> 211 211 </p></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="s1-test-ldap-tls"></a>Testing</h2></div></div></div><p> 212 <a class="indexterm" name="id4 46282"></a>212 <a class="indexterm" name="id470412"></a> 213 213 This is the easy part. Restart the server: 214 214 </p><pre class="screen"> … … 221 221 </pre><p> 222 222 Then, using <code class="literal">ldapsearch</code>, test an anonymous search with the 223 <code class="option">-ZZ</code><sup>[<a name="id4 46321" href="#ftn.id446321">12</a>]</sup> option:223 <code class="option">-ZZ</code><sup>[<a name="id470452" href="#ftn.id470452" class="footnote">12</a>]</sup> option: 224 224 </p><pre class="screen"> 225 225 <code class="computeroutput"> … … 264 264 </code> 265 265 </pre><p> 266 If you have any problems, please read <a href="ch-ldap-tls.html#s1-int-ldap-tls" title="Troubleshooting">the section called “Troubleshooting”</a>266 If you have any problems, please read <a class="xref" href="ch-ldap-tls.html#s1-int-ldap-tls" title="Troubleshooting">the section called “Troubleshooting”</a> 267 267 </p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="s1-int-ldap-tls"></a>Troubleshooting</h2></div></div></div><p> 268 <a class="indexterm" name="id4 46402"></a>268 <a class="indexterm" name="id470533"></a> 269 269 The most common error when configuring TLS, as I have already mentioned numerous times, is that the 270 <span class="emphasis"><em>Common Name (CN)</em></span> you entered in <a href="ch-ldap-tls.html#s1-config-ldap-tls-server" title="Generating the Server Certificate">the section called “Generating the Server Certificate”</a> is270 <span class="emphasis"><em>Common Name (CN)</em></span> you entered in <a class="xref" href="ch-ldap-tls.html#s1-config-ldap-tls-server" title="Generating the Server Certificate">the section called “Generating the Server Certificate”</a> is 271 271 <span class="emphasis"><em>NOT</em></span> the Fully Qualified Domain Name (FQDN) of your ldap server. 272 272 </p><p> 273 273 Other errors could be that you have a typo somewhere in your <code class="literal">ldapsearch</code> command, or that 274 274 your have the wrong permissions on the <code class="filename">servercrt.pem</code> and <code class="filename">cacert.pem</code> 275 files. They should be set with <code class="literal">chmod 640</code>, as per <a href="ch-ldap-tls.html#s1-config-ldap-tls-install" title="Installing the Certificates">the section called “Installing the Certificates”</a>.275 files. They should be set with <code class="literal">chmod 640</code>, as per <a class="xref" href="ch-ldap-tls.html#s1-config-ldap-tls-install" title="Installing the Certificates">the section called “Installing the Certificates”</a>. 276 276 </p><p> 277 277 For anything else, it's best to read through your ldap logfile or join the <span class="application">OpenLDAP</span> mailing list. 278 </p></div><div class="footnotes"><br><hr width="100" align="left"><div class="footnote"><p><sup>[<a name="ftn.id4 45783" href="#id445783">8</a>] </sup>We could however, get our generated server certificate signed by proper CAs, like <a href="http://www.thawte.com/" target="_top">Thawte</a> and <ahref="http://www.verisign.com/" target="_top">VeriSign</a>, which279 you pay for, or the free ones, via <a href="http://www.cacert.org/" target="_top">CAcert</a>280 </p></div><div class="footnote"><p><sup>[<a name="ftn.id4 45822" href="#id445822">9</a>] </sup>The downside to278 </p></div><div class="footnotes"><br><hr width="100" align="left"><div class="footnote"><p><sup>[<a name="ftn.id469921" href="#id469921" class="para">8</a>] </sup>We could however, get our generated server certificate signed by proper CAs, like <a class="ulink" href="http://www.thawte.com/" target="_top">Thawte</a> and <a class="ulink" href="http://www.verisign.com/" target="_top">VeriSign</a>, which 279 you pay for, or the free ones, via <a class="ulink" href="http://www.cacert.org/" target="_top">CAcert</a> 280 </p></div><div class="footnote"><p><sup>[<a name="ftn.id469961" href="#id469961" class="para">9</a>] </sup>The downside to 281 281 making our own CA, is that the certificate is not automatically recognized by clients, like the commercial 282 ones are.</p></div><div class="footnote"><p><sup>[<a name="ftn.id4 45838" href="#id445838">10</a>] </sup>For information straight from the283 horse's mouth, please visit <a href="http://www.openssl.org/docs/HOWTO/" target="_top">http://www.openssl.org/docs/HOWTO/</a>; the main OpenSSL284 site.</p></div><div class="footnote"><p><sup>[<a name="ftn.id4 45910" href="#id445910">11</a>] </sup>Your <code class="filename">CA.pl</code> or <code class="filename">CA.sh</code> might not be282 ones are.</p></div><div class="footnote"><p><sup>[<a name="ftn.id469977" href="#id469977" class="para">10</a>] </sup>For information straight from the 283 horse's mouth, please visit <a class="ulink" href="http://www.openssl.org/docs/HOWTO/" target="_top">http://www.openssl.org/docs/HOWTO/</a>; the main OpenSSL 284 site.</p></div><div class="footnote"><p><sup>[<a name="ftn.id470049" href="#id470049" class="para">11</a>] </sup>Your <code class="filename">CA.pl</code> or <code class="filename">CA.sh</code> might not be 285 285 in the same location as mine is, you can find it by using the <code class="literal">locate</code> command, i.e., 286 286 <code class="literal">locate CA.pl</code>. If the command complains about the database being too old, run 287 <code class="literal">updatedb</code> as <span class="emphasis"><em>root</em></span> to update it.</p></div><div class="footnote"><p><sup>[<a name="ftn.id4 46321" href="#id446321">12</a>] </sup>See <code class="literal">man ldapsearch</code></p></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="speed.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="Appendix.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch46.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 44. Samba Performance Tuning </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 46. Samba Support</td></tr></table></div></body></html>287 <code class="literal">updatedb</code> as <span class="emphasis"><em>root</em></span> to update it.</p></div><div class="footnote"><p><sup>[<a name="ftn.id470452" href="#id470452" class="para">12</a>] </sup>See <code class="literal">man ldapsearch</code></p></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="speed.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="Appendix.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch46.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 44. Samba Performance Tuning </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 46. Samba Support</td></tr></table></div></body></html>
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