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<?xml version="1.0" ?> <!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"> <head> <title>ct</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body style="background-color: white"> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#HISTORY">HISTORY</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>ct - Certificate Transparency</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/ct.h></code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>This library implements Certificate Transparency (CT) verification for TLS clients, as defined in RFC 6962. This verification can provide some confidence that a certificate has been publicly logged in a set of CT logs.</p> <p>By default, these checks are disabled. They can be enabled using <a href="../man3/SSL_CTX_enable_ct.html">SSL_CTX_enable_ct(3)</a> or <a href="../man3/SSL_enable_ct.html">SSL_enable_ct(3)</a>.</p> <p>This library can also be used to parse and examine CT data structures, such as Signed Certificate Timestamps (SCTs), or to read a list of CT logs. There are functions for: - decoding and encoding SCTs in DER and TLS wire format. - printing SCTs. - verifying the authenticity of SCTs. - loading a CT log list from a CONF file.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/d2i_SCT_LIST.html">d2i_SCT_LIST(3)</a>, <a href="../man3/CTLOG_STORE_new.html">CTLOG_STORE_new(3)</a>, <a href="../man3/CTLOG_STORE_get0_log_by_id.html">CTLOG_STORE_get0_log_by_id(3)</a>, <a href="../man3/SCT_new.html">SCT_new(3)</a>, <a href="../man3/SCT_print.html">SCT_print(3)</a>, <a href="../man3/SCT_validate.html">SCT_validate(3)</a>, <a href="../man3/SCT_validate.html">SCT_validate(3)</a>, <a href="../man3/CT_POLICY_EVAL_CTX_new.html">CT_POLICY_EVAL_CTX_new(3)</a>, <a href="../man3/SSL_CTX_set_ct_validation_callback.html">SSL_CTX_set_ct_validation_callback(3)</a></p> <h1 id="HISTORY">HISTORY</h1> <p>The ct library was added in OpenSSL 1.1.0.</p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>