X509_check_ca.html
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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>X509_check_ca</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <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="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>X509_check_ca - check if given certificate is CA certificate</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/x509v3.h> int X509_check_ca(X509 *cert);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>This function checks if given certificate is CA certificate (can be used to sign other certificates).</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>Function return 0, if it is not CA certificate, 1 if it is proper X509v3 CA certificate with <b>basicConstraints</b> extension CA:TRUE, 3, if it is self-signed X509 v1 certificate, 4, if it is certificate with <b>keyUsage</b> extension with bit <b>keyCertSign</b> set, but without <b>basicConstraints</b>, and 5 if it has outdated Netscape Certificate Type extension telling that it is CA certificate.</p> <p>Actually, any nonzero value means that this certificate could have been used to sign other certificates.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/X509_verify_cert.html">X509_verify_cert(3)</a>, <a href="../man3/X509_check_issued.html">X509_check_issued(3)</a>, <a href="../man3/X509_check_purpose.html">X509_check_purpose(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2015-2020 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>
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