96 lines
3.2 KiB
HTML
Executable File
96 lines
3.2 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>X509_verify_cert</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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<li><a href="#name">NAME</a></li>
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<li><a href="#synopsis">SYNOPSIS</a></li>
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<li><a href="#description">DESCRIPTION</a></li>
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<li><a href="#return_values">RETURN VALUES</a></li>
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<li><a href="#bugs">BUGS</a></li>
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<li><a href="#see_also">SEE ALSO</a></li>
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<li><a href="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>X509_verify_cert - discover and verify X509 certificate chain</p>
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<p>
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</p>
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<hr />
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<h1><a name="synopsis">SYNOPSIS</a></h1>
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<pre>
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#include <openssl/x509.h></pre>
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<pre>
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int X509_verify_cert(X509_STORE_CTX *ctx);</pre>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p>The X509_verify_cert() function attempts to discover and validate a
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certificate chain based on parameters in <strong>ctx</strong>. A complete description of
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the process is contained in the <em>openssl-verify(1)</em> manual page.</p>
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<p>Applications rarely call this function directly but it is used by
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OpenSSL internally for certificate validation, in both the S/MIME and
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SSL/TLS code.</p>
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<p>A negative return value from X509_verify_cert() can occur if it is invoked
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incorrectly, such as with no certificate set in <strong>ctx</strong>, or when it is called
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twice in succession without reinitialising <strong>ctx</strong> for the second call.
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A negative return value can also happen due to internal resource problems or if
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a retry operation is requested during internal lookups (which never happens
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with standard lookup methods).
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Applications must check for <= 0 return value on error.</p>
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<p>
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</p>
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<hr />
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<h1><a name="return_values">RETURN VALUES</a></h1>
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<p>If a complete chain can be built and validated this function returns 1,
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otherwise it return zero, in exceptional circumstances it can also
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return a negative code.</p>
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<p>If the function fails additional error information can be obtained by
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examining <strong>ctx</strong> using, for example X509_STORE_CTX_get_error().</p>
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<p>
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</p>
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<hr />
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<h1><a name="bugs">BUGS</a></h1>
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<p>This function uses the header <em class="file"><x509.h</em> >>
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as opposed to most chain verification
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functions which use <em class="file"><x509_vfy.h</em> >>.</p>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>X509_STORE_CTX_get_error(3)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2009-2016 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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