Provided by: libssl-doc_1.1.1f-1ubuntu2.23_all 
NAME
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
SYNOPSIS
#include <openssl/x509_vfy.h>
typedef x509_lookup_method_st X509_LOOKUP_METHOD;
X509_LOOKUP_METHOD *X509_LOOKUP_meth_new(const char *name);
void X509_LOOKUP_meth_free(X509_LOOKUP_METHOD *method);
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);
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);
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);
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);
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);
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);
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);
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);
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);
int X509_OBJECT_set1_X509(X509_OBJECT *a, X509 *obj);
int X509_OBJECT_set1_X509_CRL(X509_OBJECT *a, X509_CRL *obj);
DESCRIPTION
The X509_LOOKUP_METHOD 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 X509_LOOKUP structure.
X509_LOOKUP_meth_new() creates a new X509_LOOKUP_METHOD structure. It should be given a
human-readable string containing a brief description of the lookup method.
X509_LOOKUP_meth_free() destroys a X509_LOOKUP_METHOD structure.
X509_LOOKUP_get_new_item() and X509_LOOKUP_set_new_item() get and set the function that is
called when an X509_LOOKUP 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 X509_LOOKUP_set_method_data(3).
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.
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 X509_LOOKUP_set_method_data(3) as
part of the new_item routine.
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.
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 ctx, along with the arguments passed by
X509_LOOKUP_ctrl. cmd is an arbitrary integer that defines some operation. argc is a
pointer to an array of characters. argl is an integer. ret, if set, points to a location
where any return data should be written to. How argc and argl are used depends entirely on
the control function.
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.
Implementations must add objects they find to the X509_STORE 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.
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.
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 X509_LOOKUP_get_method_data(3). The
X509_STORE object that owns the X509_LOOKUP may be accessed with X509_LOOKUP_get_store(3).
Successful lookups should return 1, and unsuccessful lookups should return 0.
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.
RETURN VALUES
The X509_LOOKUP_meth_set functions return 1 on success or 0 on error.
The X509_LOOKUP_meth_get functions return the corresponding function pointers.
SEE ALSO
X509_STORE_new(3), SSL_CTX_set_cert_store(3)
HISTORY
The functions described here were added in OpenSSL 1.1.0i.
COPYRIGHT
Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
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 <https://www.openssl.org/source/license.html>.