docs/manual/ssl/ssl_compat.html.en


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
              This file is generated from xml source: DO NOT EDIT
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
      -->
<title>SSL/TLS Strong Encryption: Compatibility - Apache HTTP Server</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body id="manual-page"><div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.3</p>
<img alt="" src="../images/feather.gif" /></div>
<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.3</a> &gt; <a href="./">SSL/TLS</a></div><div id="page-content"><div id="preamble"><h1>SSL/TLS Strong Encryption: Compatibility</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/ssl/ssl_compat.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/ssl/ssl_compat.html" hreflang="fr" rel="alternate" title="Fran�ais">&nbsp;fr&nbsp;</a> |
<a href="../zh-cn/ssl/ssl_compat.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese">&nbsp;zh-cn&nbsp;</a></p>
</div>

<blockquote>
<p>All PCs are compatible. But some of
them are more compatible than others.</p>
<p class="cite">-- <cite>Unknown</cite></p>
</blockquote>

<p>
This page covers backwards compatibility between mod_ssl and other
SSL solutions.  mod_ssl is not the only SSL solution for Apache; four
additional products are (or were) also available: Ben Laurie's freely
available <a href="http://www.apache-ssl.org/">Apache-SSL</a> (from
where mod_ssl were originally derived in 1998), Red Hat's commercial
<a href="http://www.redhat.com/products/product-details.phtml?id=rhsa">Secure
Web Server</a> (which was based on mod_ssl), Covalent's commercial <a href="http://www.covalent.net/">Raven SSL Module</a> (also based on
mod_ssl) and finally C2Net's (now Red Hat's) commercial product <a href="http://www.redhat.com/explore/stronghold/">Stronghold</a> (based
on a different evolution branch named Sioux up to Stronghold 2.x and
based on mod_ssl since Stronghold 3.x).</p>

<p>
mod_ssl mostly provides a superset of the functionality of all the other
solutions, so it's simple to migrate from one of the older modules to
mod_ssl. The configuration directives and environment variable names
used by the older SSL solutions vary from those used in mod_ssl;
mapping tables are included here to give the equivalents used by mod_ssl.</p>
</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#configuration">Configuration Directives</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#variables">Environment Variables</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#customlog">Custom Log Functions</a></li>
</ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="configuration" id="configuration">Configuration Directives</a></h2>
<p>The mapping between configuration directives used by Apache-SSL
1.x and mod_ssl 2.0.x is given in <a href="#table1">Table
1</a>. The mapping from Sioux 1.x and Stronghold 2.x is only partial
because of special functionality in these interfaces which mod_ssl
doesn't provide.</p>


<h3><a name="table1" id="table1">Table 1: Configuration Directive Mapping</a></h3>

<table><tr class="header"><th>Old Directive</th><th>mod_ssl Directive</th><th>Comment</th></tr>
<tr class="header"><th colspan="3">Apache-SSL 1.x &amp; mod_ssl 2.0.x compatibility:</th></tr>
<tr><td><code>SSLEnable</code></td><td><code>SSLEngine on</code></td><td>compactified</td></tr>
<tr class="odd"><td><code>SSLDisable</code></td><td><code>SSLEngine off</code></td><td>compactified</td></tr>
<tr><td><code>SSLLogFile</code> <em>file</em></td><td><code>SSLLog</code> <em>file</em></td><td>compactified</td></tr>
<tr class="odd"><td><code>SSLRequiredCiphers</code> <em>spec</em></td><td><code>SSLCipherSuite</code> <em>spec</em></td><td>renamed</td></tr>
<tr><td><code>SSLRequireCipher</code> <em>c1</em> ...</td><td><code>SSLRequire %{SSL_CIPHER} in {"</code><em>c1</em><code>",
...}</code></td><td>generalized</td></tr>
<tr class="odd"><td><code>SSLBanCipher</code> <em>c1</em> ...</td><td><code>SSLRequire not (%{SSL_CIPHER} in {"</code><em>c1</em><code>",
...})</code></td><td>generalized</td></tr>
<tr><td><code>SSLFakeBasicAuth</code></td><td><code>SSLOptions +FakeBasicAuth</code></td><td>merged</td></tr>
<tr class="odd"><td><code>SSLCacheServerPath</code> <em>dir</em></td><td>-</td><td>functionality removed</td></tr>
<tr><td><code>SSLCacheServerPort</code> <em>integer</em></td><td>-</td><td>functionality removed</td></tr>
<tr class="header"><th colspan="3">Apache-SSL 1.x compatibility:</th></tr>
<tr class="odd"><td><code>SSLExportClientCertificates</code></td><td><code>SSLOptions +ExportCertData</code></td><td>merged</td></tr>
<tr><td><code>SSLCacheServerRunDir</code> <em>dir</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="header"><th colspan="3">Sioux 1.x compatibility:</th></tr>
<tr class="odd"><td><code>SSL_CertFile</code> <em>file</em></td><td><code>SSLCertificateFile</code> <em>file</em></td><td>renamed</td></tr>
<tr><td><code>SSL_KeyFile</code> <em>file</em></td><td><code>SSLCertificateKeyFile</code> <em>file</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CipherSuite</code> <em>arg</em></td><td><code>SSLCipherSuite</code> <em>arg</em></td><td>renamed</td></tr>
<tr><td><code>SSL_X509VerifyDir</code> <em>arg</em></td><td><code>SSLCACertificatePath</code> <em>arg</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_Log</code> <em>file</em></td><td><code>SSLLogFile</code> <em>file</em></td><td>renamed</td></tr>
<tr><td><code>SSL_Connect</code> <em>flag</em></td><td><code>SSLEngine</code> <em>flag</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_ClientAuth</code> <em>arg</em></td><td><code>SSLVerifyClient</code> <em>arg</em></td><td>renamed</td></tr>
<tr><td><code>SSL_X509VerifyDepth</code> <em>arg</em></td><td><code>SSLVerifyDepth</code> <em>arg</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_FetchKeyPhraseFrom</code> <em>arg</em></td><td>-</td><td>not directly mappable; use SSLPassPhraseDialog</td></tr>
<tr><td><code>SSL_SessionDir</code> <em>dir</em></td><td>-</td><td>not directly mappable; use SSLSessionCache</td></tr>
<tr class="odd"><td><code>SSL_Require</code> <em>expr</em></td><td>-</td><td>not directly mappable; use SSLRequire</td></tr>
<tr><td><code>SSL_CertFileType</code> <em>arg</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="odd"><td><code>SSL_KeyFileType</code> <em>arg</em></td><td>-</td><td>functionality not supported</td></tr>
<tr><td><code>SSL_X509VerifyPolicy</code> <em>arg</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="odd"><td><code>SSL_LogX509Attributes</code> <em>arg</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="header"><th colspan="3">Stronghold 2.x compatibility:</th></tr>
<tr><td><code>StrongholdAccelerator</code> <em>engine</em></td><td><code>SSLCryptoDevice</code> <em>engine</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>StrongholdKey</code> <em>dir</em></td><td>-</td><td>functionality not needed</td></tr>
<tr><td><code>StrongholdLicenseFile</code> <em>dir</em></td><td>-</td><td>functionality not needed</td></tr>
<tr class="odd"><td><code>SSLFlag</code> <em>flag</em></td><td><code>SSLEngine</code> <em>flag</em></td><td>renamed</td></tr>
<tr><td><code>SSLSessionLockFile</code> <em>file</em></td><td><code>SSLMutex</code> <em>file</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSLCipherList</code> <em>spec</em></td><td><code>SSLCipherSuite</code> <em>spec</em></td><td>renamed</td></tr>
<tr><td><code>RequireSSL</code></td><td><code>SSLRequireSSL</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSLErrorFile</code> <em>file</em></td><td>-</td><td>functionality not supported</td></tr>
<tr><td><code>SSLRoot</code> <em>dir</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="odd"><td><code>SSL_CertificateLogDir</code> <em>dir</em></td><td>-</td><td>functionality not supported</td></tr>
<tr><td><code>AuthCertDir</code> <em>dir</em></td><td>-</td><td>functionality not supported</td></tr>
<tr class="odd"><td><code>SSL_Group</code> <em>name</em></td><td>-</td><td>functionality not supported</td></tr>
<tr><td><code>SSLProxyMachineCertPath</code> <em>dir</em></td><td><code>SSLProxyMachineCertificatePath</code> <em>dir</em></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSLProxyMachineCertFile</code> <em>file</em></td><td><code>SSLProxyMachineCertificateFile</code> <em>file</em></td><td>renamed</td></tr>
<tr><td><code>SSLProxyCipherList</code> <em>spec</em></td><td><code>SSLProxyCipherSpec</code> <em>spec</em></td><td>renamed</td></tr>
</table>

</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="variables" id="variables">Environment Variables</a></h2>

<p>The mapping between environment variable names used by the older
SSL solutions and the names used by mod_ssl is given in <a href="#table2">Table 2</a>.</p>

<h3><a name="table2" id="table2">Table 2: Environment Variable Derivation</a></h3>

<table><tr class="header"><th>Old Variable</th><th>mod_ssl Variable</th><th>Comment</th></tr>
<tr><td><code>SSL_PROTOCOL_VERSION</code></td><td><code>SSL_PROTOCOL</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSLEAY_VERSION</code></td><td><code>SSL_VERSION_LIBRARY</code></td><td>renamed</td></tr>
<tr><td><code>HTTPS_SECRETKEYSIZE</code></td><td><code>SSL_CIPHER_USEKEYSIZE</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>HTTPS_KEYSIZE</code></td><td><code>SSL_CIPHER_ALGKEYSIZE</code></td><td>renamed</td></tr>
<tr><td><code>HTTPS_CIPHER</code></td><td><code>SSL_CIPHER</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>HTTPS_EXPORT</code></td><td><code>SSL_CIPHER_EXPORT</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_KEY_SIZE</code></td><td><code>SSL_CIPHER_ALGKEYSIZE</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_CERTIFICATE</code></td><td><code>SSL_SERVER_CERT</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_CERT_START</code></td><td><code>SSL_SERVER_V_START</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_CERT_END</code></td><td><code>SSL_SERVER_V_END</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_CERT_SERIAL</code></td><td><code>SSL_SERVER_M_SERIAL</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_SIGNATURE_ALGORITHM</code></td><td><code>SSL_SERVER_A_SIG</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_DN</code></td><td><code>SSL_SERVER_S_DN</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_CN</code></td><td><code>SSL_SERVER_S_DN_CN</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_EMAIL</code></td><td><code>SSL_SERVER_S_DN_Email</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_O</code></td><td><code>SSL_SERVER_S_DN_O</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_OU</code></td><td><code>SSL_SERVER_S_DN_OU</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_C</code></td><td><code>SSL_SERVER_S_DN_C</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_SP</code></td><td><code>SSL_SERVER_S_DN_SP</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_L</code></td><td><code>SSL_SERVER_S_DN_L</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_IDN</code></td><td><code>SSL_SERVER_I_DN</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_ICN</code></td><td><code>SSL_SERVER_I_DN_CN</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_IEMAIL</code></td><td><code>SSL_SERVER_I_DN_Email</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_IO</code></td><td><code>SSL_SERVER_I_DN_O</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_IOU</code></td><td><code>SSL_SERVER_I_DN_OU</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_IC</code></td><td><code>SSL_SERVER_I_DN_C</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SERVER_ISP</code></td><td><code>SSL_SERVER_I_DN_SP</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SERVER_IL</code></td><td><code>SSL_SERVER_I_DN_L</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_CERTIFICATE</code></td><td><code>SSL_CLIENT_CERT</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_CERT_START</code></td><td><code>SSL_CLIENT_V_START</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_CERT_END</code></td><td><code>SSL_CLIENT_V_END</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_CERT_SERIAL</code></td><td><code>SSL_CLIENT_M_SERIAL</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_SIGNATURE_ALGORITHM</code></td><td><code>SSL_CLIENT_A_SIG</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_DN</code></td><td><code>SSL_CLIENT_S_DN</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_CN</code></td><td><code>SSL_CLIENT_S_DN_CN</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_EMAIL</code></td><td><code>SSL_CLIENT_S_DN_Email</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_O</code></td><td><code>SSL_CLIENT_S_DN_O</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_OU</code></td><td><code>SSL_CLIENT_S_DN_OU</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_C</code></td><td><code>SSL_CLIENT_S_DN_C</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_SP</code></td><td><code>SSL_CLIENT_S_DN_SP</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_L</code></td><td><code>SSL_CLIENT_S_DN_L</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_IDN</code></td><td><code>SSL_CLIENT_I_DN</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_ICN</code></td><td><code>SSL_CLIENT_I_DN_CN</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_IEMAIL</code></td><td><code>SSL_CLIENT_I_DN_Email</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_IO</code></td><td><code>SSL_CLIENT_I_DN_O</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_IOU</code></td><td><code>SSL_CLIENT_I_DN_OU</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_IC</code></td><td><code>SSL_CLIENT_I_DN_C</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_ISP</code></td><td><code>SSL_CLIENT_I_DN_SP</code></td><td>renamed</td></tr>
<tr><td><code>SSL_CLIENT_IL</code></td><td><code>SSL_CLIENT_I_DN_L</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_EXPORT</code></td><td><code>SSL_CIPHER_EXPORT</code></td><td>renamed</td></tr>
<tr><td><code>SSL_KEYSIZE</code></td><td><code>SSL_CIPHER_ALGKEYSIZE</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_SECKEYSIZE</code></td><td><code>SSL_CIPHER_USEKEYSIZE</code></td><td>renamed</td></tr>
<tr><td><code>SSL_SSLEAY_VERSION</code></td><td><code>SSL_VERSION_LIBRARY</code></td><td>renamed</td></tr>
<tr class="odd"><td><code>SSL_STRONG_CRYPTO</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_SERVER_KEY_EXP</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr class="odd"><td><code>SSL_SERVER_KEY_ALGORITHM</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_SERVER_KEY_SIZE</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr class="odd"><td><code>SSL_SERVER_SESSIONDIR</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_SERVER_CERTIFICATELOGDIR</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr class="odd"><td><code>SSL_SERVER_CERTFILE</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_SERVER_KEYFILE</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr class="odd"><td><code>SSL_SERVER_KEYFILETYPE</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_CLIENT_KEY_EXP</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr class="odd"><td><code>SSL_CLIENT_KEY_ALGORITHM</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
<tr><td><code>SSL_CLIENT_KEY_SIZE</code></td><td><code>-</code></td><td>Not supported by mod_ssl</td></tr>
</table>

</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="customlog" id="customlog">Custom Log Functions</a></h2>
<p>
When mod_ssl is enabled, additional functions exist for the <a href="../mod/mod_log_config.html#formats">Custom Log Format</a> of
<code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code> as documented in the Reference
Chapter. Beside the ``<code>%{</code><em>varname</em><code>}x</code>''
eXtension format function which can be used to expand any variables provided
by any module, an additional Cryptography
``<code>%{</code><em>name</em><code>}c</code>'' cryptography format function
exists for backward compatibility. The currently implemented function calls
are listed in <a href="#table3">Table 3</a>.</p>

<h3><a name="table3" id="table3">Table 3: Custom Log Cryptography Function</a></h3>

<table>

<tr><th>Function Call</th><th>Description</th></tr>

<tr><td><code>%...{version}c</code></td>   <td>SSL protocol version</td></tr>
<tr><td><code>%...{cipher}c</code></td>    <td>SSL cipher</td></tr>
<tr><td><code>%...{subjectdn}c</code></td> <td>Client Certificate Subject Distinguished Name</td></tr>
<tr><td><code>%...{issuerdn}c</code></td>  <td>Client Certificate Issuer Distinguished Name</td></tr>
<tr><td><code>%...{errcode}c</code></td>   <td>Certificate Verification Error (numerical)</td></tr>

<tr><td><code>%...{errstr}c</code></td>    <td>Certificate Verification Error (string)</td></tr>
</table>

</div></div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/ssl/ssl_compat.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/ssl/ssl_compat.html" hreflang="fr" rel="alternate" title="Fran�ais">&nbsp;fr&nbsp;</a> |
<a href="../zh-cn/ssl/ssl_compat.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese">&nbsp;zh-cn&nbsp;</a></p>
</div><div id="footer">
<p class="apache">Copyright 2011 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div>
</body></html>