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download PDF document: X509_LOOKUP_meth_get_get_by_subject.3.pdf

X509_LOOKUP_METH_NEW(3ossl) OpenSSL X509_LOOKUP_METH_NEW(3ossl)

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,
typedef int (*X509_LOOKUP_get_by_issuer_serial_fn)(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type, const X509_NAME *name, const 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_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 Apache License 2.0 (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>.