169 lines
8.1 KiB
HTML
Executable File
169 lines
8.1 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>X509v3_get_ext_by_NID</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="#notes">NOTES</a></li>
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<li><a href="#return_values">RETURN VALUES</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>X509v3_get_ext_count, X509v3_get_ext, X509v3_get_ext_by_NID,
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X509v3_get_ext_by_OBJ, X509v3_get_ext_by_critical, X509v3_delete_ext,
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X509v3_add_ext, X509_get_ext_count, X509_get_ext,
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X509_get_ext_by_NID, X509_get_ext_by_OBJ, X509_get_ext_by_critical,
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X509_delete_ext, X509_add_ext, X509_CRL_get_ext_count, X509_CRL_get_ext,
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X509_CRL_get_ext_by_NID, X509_CRL_get_ext_by_OBJ, X509_CRL_get_ext_by_critical,
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X509_CRL_delete_ext, X509_CRL_add_ext, X509_REVOKED_get_ext_count,
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X509_REVOKED_get_ext, X509_REVOKED_get_ext_by_NID, X509_REVOKED_get_ext_by_OBJ,
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X509_REVOKED_get_ext_by_critical, X509_REVOKED_delete_ext,
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X509_REVOKED_add_ext - extension stack utility functions</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 X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x);
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X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc);</pre>
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<pre>
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int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x,
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int nid, int lastpos);
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int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *x,
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const ASN1_OBJECT *obj, int lastpos);
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int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *x,
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int crit, int lastpos);
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X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc);
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STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
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X509_EXTENSION *ex, int loc);</pre>
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<pre>
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int X509_get_ext_count(const X509 *x);
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X509_EXTENSION *X509_get_ext(const X509 *x, int loc);
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int X509_get_ext_by_NID(const X509 *x, int nid, int lastpos);
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int X509_get_ext_by_OBJ(const X509 *x, const ASN1_OBJECT *obj, int lastpos);
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int X509_get_ext_by_critical(const X509 *x, int crit, int lastpos);
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X509_EXTENSION *X509_delete_ext(X509 *x, int loc);
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int X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);</pre>
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<pre>
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int X509_CRL_get_ext_count(const X509_CRL *x);
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X509_EXTENSION *X509_CRL_get_ext(const X509_CRL *x, int loc);
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int X509_CRL_get_ext_by_NID(const X509_CRL *x, int nid, int lastpos);
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int X509_CRL_get_ext_by_OBJ(const X509_CRL *x, const ASN1_OBJECT *obj, int lastpos);
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int X509_CRL_get_ext_by_critical(const X509_CRL *x, int crit, int lastpos);
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X509_EXTENSION *X509_CRL_delete_ext(X509_CRL *x, int loc);
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int X509_CRL_add_ext(X509_CRL *x, X509_EXTENSION *ex, int loc);</pre>
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<pre>
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int X509_REVOKED_get_ext_count(const X509_REVOKED *x);
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X509_EXTENSION *X509_REVOKED_get_ext(const X509_REVOKED *x, int loc);
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int X509_REVOKED_get_ext_by_NID(const X509_REVOKED *x, int nid, int lastpos);
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int X509_REVOKED_get_ext_by_OBJ(const X509_REVOKED *x, const ASN1_OBJECT *obj,
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int lastpos);
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int X509_REVOKED_get_ext_by_critical(const X509_REVOKED *x, int crit, int lastpos);
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X509_EXTENSION *X509_REVOKED_delete_ext(X509_REVOKED *x, int loc);
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int X509_REVOKED_add_ext(X509_REVOKED *x, X509_EXTENSION *ex, int loc);</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>X509v3_get_ext_count() retrieves the number of extensions in <strong>x</strong>.</p>
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<p>X509v3_get_ext() retrieves extension <strong>loc</strong> from <strong>x</strong>. The index <strong>loc</strong>
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can take any value from <strong>0</strong> to X509_get_ext_count(x) - 1. The returned
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extension is an internal pointer which <strong>must not</strong> be freed up by the
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application.</p>
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<p>X509v3_get_ext_by_NID() and X509v3_get_ext_by_OBJ() look for an extension
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with <strong>nid</strong> or <strong>obj</strong> from extension stack <strong>x</strong>. The search starts from the
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extension after <strong>lastpos</strong> or from the beginning if <lastpos> is <strong>-1</strong>. If
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the extension is found its index is returned otherwise <strong>-1</strong> is returned.</p>
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<p>X509v3_get_ext_by_critical() is similar to X509v3_get_ext_by_NID() except it
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looks for an extension of criticality <strong>crit</strong>. A zero value for <strong>crit</strong>
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looks for a non-critical extension a nonzero value looks for a critical
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extension.</p>
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<p>X509v3_delete_ext() deletes the extension with index <strong>loc</strong> from <strong>x</strong>. The
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deleted extension is returned and must be freed by the caller. If <strong>loc</strong>
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is in invalid index value <strong>NULL</strong> is returned.</p>
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<p>X509v3_add_ext() adds extension <strong>ex</strong> to stack <strong>*x</strong> at position <strong>loc</strong>. If
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<strong>loc</strong> is <strong>-1</strong> the new extension is added to the end. If <strong>*x</strong> is <strong>NULL</strong>
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a new stack will be allocated. The passed extension <strong>ex</strong> is duplicated
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internally so it must be freed after use.</p>
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<p>X509_get_ext_count(), X509_get_ext(), X509_get_ext_by_NID(),
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X509_get_ext_by_OBJ(), X509_get_ext_by_critical(), X509_delete_ext()
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and X509_add_ext() operate on the extensions of certificate <strong>x</strong> they are
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otherwise identical to the X509v3 functions.</p>
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<p>X509_CRL_get_ext_count(), X509_CRL_get_ext(), X509_CRL_get_ext_by_NID(),
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X509_CRL_get_ext_by_OBJ(), X509_CRL_get_ext_by_critical(),
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X509_CRL_delete_ext() and X509_CRL_add_ext() operate on the extensions of
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CRL <strong>x</strong> they are otherwise identical to the X509v3 functions.</p>
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<p>X509_REVOKED_get_ext_count(), X509_REVOKED_get_ext(),
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X509_REVOKED_get_ext_by_NID(), X509_REVOKED_get_ext_by_OBJ(),
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X509_REVOKED_get_ext_by_critical(), X509_REVOKED_delete_ext() and
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X509_REVOKED_add_ext() operate on the extensions of CRL entry <strong>x</strong>
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they are otherwise identical to the X509v3 functions.</p>
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<p>
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</p>
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<hr />
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<h1><a name="notes">NOTES</a></h1>
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<p>These functions are used to examine stacks of extensions directly. Many
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applications will want to parse or encode and add an extension: they should
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use the extension encode and decode functions instead such as
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X509_add1_ext_i2d() and X509_get_ext_d2i().</p>
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<p>Extension indices start from zero, so a zero index return value is <strong>not</strong> an
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error. These search functions start from the extension <strong>after</strong> the <strong>lastpos</strong>
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parameter so it should initially be set to <strong>-1</strong>, if it is set to zero the
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initial extension will not be checked.</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>X509v3_get_ext_count() returns the extension count.</p>
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<p>X509v3_get_ext(), X509v3_delete_ext() and X509_delete_ext() return an
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<strong>X509_EXTENSION</strong> pointer or <strong>NULL</strong> if an error occurs.</p>
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<p>X509v3_get_ext_by_NID() X509v3_get_ext_by_OBJ() and
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X509v3_get_ext_by_critical() return the an extension index or <strong>-1</strong> if an
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error occurs.</p>
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<p>X509v3_add_ext() returns a stack of extensions or <strong>NULL</strong> on error.</p>
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<p>X509_add_ext() returns 1 on success and 0 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="see_also">SEE ALSO</a></h1>
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<p><em>X509V3_get_d2i(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 2015-2018 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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