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<p><a name="__index__"></a></p>
<ul>
<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="#history">HISTORY</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
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<p>
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<hr />
<h1><a name="name">NAME</a></h1>
<p>X509_LOOKUP_METHOD,
X509_LOOKUP_meth_new, X509_LOOKUP_meth_free, X509_LOOKUP_meth_set_new_item,
X509_LOOKUP_meth_get_new_item, X509_LOOKUP_meth_set_free,
X509_LOOKUP_meth_get_free, X509_LOOKUP_meth_set_init,
X509_LOOKUP_meth_get_init, X509_LOOKUP_meth_set_shutdown,
X509_LOOKUP_meth_get_shutdown,
X509_LOOKUP_ctrl_fn, X509_LOOKUP_meth_set_ctrl, X509_LOOKUP_meth_get_ctrl,
X509_LOOKUP_get_by_subject_fn, X509_LOOKUP_meth_set_get_by_subject,
X509_LOOKUP_meth_get_get_by_subject,
X509_LOOKUP_get_by_issuer_serial_fn, X509_LOOKUP_meth_set_get_by_issuer_serial,
X509_LOOKUP_meth_get_get_by_issuer_serial,
X509_LOOKUP_get_by_fingerprint_fn, X509_LOOKUP_meth_set_get_by_fingerprint,
X509_LOOKUP_meth_get_get_by_fingerprint,
X509_LOOKUP_get_by_alias_fn, X509_LOOKUP_meth_set_get_by_alias,
X509_LOOKUP_meth_get_get_by_alias,
X509_OBJECT_set1_X509, X509_OBJECT_set1_X509_CRL
- Routines to build up X509_LOOKUP methods</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include <openssl/x509_vfy.h></pre>
<pre>
typedef x509_lookup_method_st X509_LOOKUP_METHOD;</pre>
<pre>
X509_LOOKUP_METHOD *X509_LOOKUP_meth_new(const char *name);
void X509_LOOKUP_meth_free(X509_LOOKUP_METHOD *method);</pre>
<pre>
int X509_LOOKUP_meth_set_new_item(X509_LOOKUP_METHOD *method,
int (*new_item) (X509_LOOKUP *ctx));
int (*X509_LOOKUP_meth_get_new_item(const X509_LOOKUP_METHOD* method))
(X509_LOOKUP *ctx);</pre>
<pre>
int X509_LOOKUP_meth_set_free(X509_LOOKUP_METHOD *method,
void (*free) (X509_LOOKUP *ctx));
void (*X509_LOOKUP_meth_get_free(const X509_LOOKUP_METHOD* method))
(X509_LOOKUP *ctx);</pre>
<pre>
int X509_LOOKUP_meth_set_init(X509_LOOKUP_METHOD *method,
int (*init) (X509_LOOKUP *ctx));
int (*X509_LOOKUP_meth_get_init(const X509_LOOKUP_METHOD* method))
(X509_LOOKUP *ctx);</pre>
<pre>
int X509_LOOKUP_meth_set_shutdown(X509_LOOKUP_METHOD *method,
int (*shutdown) (X509_LOOKUP *ctx));
int (*X509_LOOKUP_meth_get_shutdown(const X509_LOOKUP_METHOD* method))
(X509_LOOKUP *ctx);</pre>
<pre>
typedef int (*X509_LOOKUP_ctrl_fn)(X509_LOOKUP *ctx, int cmd, const char *argc,
long argl, char **ret);
int X509_LOOKUP_meth_set_ctrl(X509_LOOKUP_METHOD *method,
X509_LOOKUP_ctrl_fn ctrl_fn);
X509_LOOKUP_ctrl_fn X509_LOOKUP_meth_get_ctrl(const X509_LOOKUP_METHOD *method);</pre>
<pre>
typedef int (*X509_LOOKUP_get_by_subject_fn)(X509_LOOKUP *ctx,
X509_LOOKUP_TYPE type,
X509_NAME *name,
X509_OBJECT *ret);
int X509_LOOKUP_meth_set_get_by_subject(X509_LOOKUP_METHOD *method,
X509_LOOKUP_get_by_subject_fn fn);
X509_LOOKUP_get_by_subject_fn X509_LOOKUP_meth_get_get_by_subject(
const X509_LOOKUP_METHOD *method);</pre>
<pre>
typedef int (*X509_LOOKUP_get_by_issuer_serial_fn)(X509_LOOKUP *ctx,
X509_LOOKUP_TYPE type,
X509_NAME *name,
ASN1_INTEGER *serial,
X509_OBJECT *ret);
int X509_LOOKUP_meth_set_get_by_issuer_serial(
X509_LOOKUP_METHOD *method, X509_LOOKUP_get_by_issuer_serial_fn fn);
X509_LOOKUP_get_by_issuer_serial_fn X509_LOOKUP_meth_get_get_by_issuer_serial(
const X509_LOOKUP_METHOD *method);</pre>
<pre>
typedef int (*X509_LOOKUP_get_by_fingerprint_fn)(X509_LOOKUP *ctx,
X509_LOOKUP_TYPE type,
const unsigned char* bytes,
int len,
X509_OBJECT *ret);
int X509_LOOKUP_meth_set_get_by_fingerprint(X509_LOOKUP_METHOD *method,
X509_LOOKUP_get_by_fingerprint_fn fn);
X509_LOOKUP_get_by_fingerprint_fn X509_LOOKUP_meth_get_get_by_fingerprint(
const X509_LOOKUP_METHOD *method);</pre>
<pre>
typedef int (*X509_LOOKUP_get_by_alias_fn)(X509_LOOKUP *ctx,
X509_LOOKUP_TYPE type,
const char *str,
int len,
X509_OBJECT *ret);
int X509_LOOKUP_meth_set_get_by_alias(X509_LOOKUP_METHOD *method,
X509_LOOKUP_get_by_alias_fn fn);
X509_LOOKUP_get_by_alias_fn X509_LOOKUP_meth_get_get_by_alias(
const X509_LOOKUP_METHOD *method);</pre>
<pre>
int X509_OBJECT_set1_X509(X509_OBJECT *a, X509 *obj);
int X509_OBJECT_set1_X509_CRL(X509_OBJECT *a, X509_CRL *obj);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>The <strong>X509_LOOKUP_METHOD</strong> type is a structure used for the implementation of new
X509_LOOKUP types. It provides a set of functions used by OpenSSL for the
implementation of various X509 and X509_CRL lookup capabilities. One instance
of an X509_LOOKUP_METHOD can be associated to many instantiations of an
<strong>X509_LOOKUP</strong> structure.</p>
<p>X509_LOOKUP_meth_new() creates a new <strong>X509_LOOKUP_METHOD</strong> structure. It should
be given a human-readable string containing a brief description of the lookup
method.</p>
<p>X509_LOOKUP_meth_free() destroys a <strong>X509_LOOKUP_METHOD</strong> structure.</p>
<p>X509_LOOKUP_get_new_item() and X509_LOOKUP_set_new_item() get and set the
function that is called when an <strong>X509_LOOKUP</strong> object is created with
X509_LOOKUP_new(). If an X509_LOOKUP_METHOD requires any per-X509_LOOKUP
specific data, the supplied new_item function should allocate this data and
invoke <em>X509_LOOKUP_set_method_data(3)</em>.</p>
<p>X509_LOOKUP_get_free() and X509_LOOKUP_set_free() get and set the function
that is used to free any method data that was allocated and set from within
new_item function.</p>
<p>X509_LOOKUP_meth_get_init() and X509_LOOKUP_meth_set_init() get and set the
function that is used to initialize the method data that was set with
<em>X509_LOOKUP_set_method_data(3)</em> as part of the new_item routine.</p>
<p>X509_LOOKUP_meth_get_shutdown() and X509_LOOKUP_meth_set_shutdown() get and set
the function that is used to shut down the method data whose state was
previously initialized in the init function.</p>
<p>X509_LOOKUP_meth_get_ctrl() and X509_LOOKUP_meth_set_ctrl() get and set a
function to be used to handle arbitrary control commands issued by
X509_LOOKUP_ctrl(). The control function is given the X509_LOOKUP
<strong>ctx</strong>, along with the arguments passed by X509_LOOKUP_ctrl. <strong>cmd</strong> is
an arbitrary integer that defines some operation. <strong>argc</strong> is a pointer
to an array of characters. <strong>argl</strong> is an integer. <strong>ret</strong>, if set,
points to a location where any return data should be written to. How
<strong>argc</strong> and <strong>argl</strong> are used depends entirely on the control function.</p>
<p>X509_LOOKUP_set_get_by_subject(), X509_LOOKUP_set_get_by_issuer_serial(),
X509_LOOKUP_set_get_by_fingerprint(), X509_LOOKUP_set_get_by_alias() set
the functions used to retrieve an X509 or X509_CRL object by the object's
subject, issuer, fingerprint, and alias respectively. These functions are given
the X509_LOOKUP context, the type of the X509_OBJECT being requested, parameters
related to the lookup, and an X509_OBJECT that will receive the requested
object.</p>
<p>Implementations must add objects they find to the <strong>X509_STORE</strong> object
using X509_STORE_add_cert() or X509_STORE_add_crl(). This increments
its reference count. However, the X509_STORE_CTX_get_by_subject()
function also increases the reference count which leads to one too
many references being held. Therefore, applications should
additionally call X509_free() or X509_CRL_free() to decrement the
reference count again.</p>
<p>Implementations should also use either X509_OBJECT_set1_X509() or
X509_OBJECT_set1_X509_CRL() to set the result. Note that this also
increments the result's reference count.</p>
<p>Any method data that was created as a result of the new_item function
set by X509_LOOKUP_meth_set_new_item() can be accessed with
<em>X509_LOOKUP_get_method_data(3)</em>. The <strong>X509_STORE</strong> object that owns the
X509_LOOKUP may be accessed with <em>X509_LOOKUP_get_store(3)</em>. Successful
lookups should return 1, and unsuccessful lookups should return 0.</p>
<p>X509_LOOKUP_get_get_by_subject(), X509_LOOKUP_get_get_by_issuer_serial(),
X509_LOOKUP_get_get_by_fingerprint(), X509_LOOKUP_get_get_by_alias() retrieve
the function set by the corresponding setter.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p>The <strong>X509_LOOKUP_meth_set</strong> functions return 1 on success or 0 on error.</p>
<p>The <strong>X509_LOOKUP_meth_get</strong> functions return the corresponding function
pointers.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>X509_STORE_new(3)</em>, <em>SSL_CTX_set_cert_store(3)</em></p>
<p>
</p>
<hr />
<h1><a name="history">HISTORY</a></h1>
<p>The functions described here were added in OpenSSL 1.1.0i.</p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2018-2020 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>
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