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=pod
=head1 NAME
X509_NAME_ENTRY_get_object, X509_NAME_ENTRY_get_data,
X509_NAME_ENTRY_set_object, X509_NAME_ENTRY_set_data,
X509_NAME_ENTRY_create_by_txt, X509_NAME_ENTRY_create_by_NID,
X509_NAME_ENTRY_create_by_OBJ - X509_NAME_ENTRY utility functions
=head1 SYNOPSIS
#include <openssl/x509.h>
ASN1_OBJECT *X509_NAME_ENTRY_get_object(const X509_NAME_ENTRY *ne);
ASN1_STRING *X509_NAME_ENTRY_get_data(const X509_NAME_ENTRY *ne);
int X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, const ASN1_OBJECT *obj);
int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
const unsigned char *bytes, int len);
X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne, const char *field,
int type, const unsigned char *bytes,
int len);
X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,
int type, const unsigned char *bytes,
int len);
X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne,
const ASN1_OBJECT *obj, int type,
const unsigned char *bytes, int len);
=head1 DESCRIPTION
X509_NAME_ENTRY_get_object() retrieves the field name of B<ne> in
and B<ASN1_OBJECT> structure.
X509_NAME_ENTRY_get_data() retrieves the field value of B<ne> in
and B<ASN1_STRING> structure.
X509_NAME_ENTRY_set_object() sets the field name of B<ne> to B<obj>.
X509_NAME_ENTRY_set_data() sets the field value of B<ne> to string type
B<type> and value determined by B<bytes> and B<len>.
X509_NAME_ENTRY_create_by_txt(), X509_NAME_ENTRY_create_by_NID()
and X509_NAME_ENTRY_create_by_OBJ() create and return an
B<X509_NAME_ENTRY> structure.
=head1 NOTES
X509_NAME_ENTRY_get_object() and X509_NAME_ENTRY_get_data() can be
used to examine an B<X509_NAME_ENTRY> function as returned by
X509_NAME_get_entry() for example.
X509_NAME_ENTRY_create_by_txt(), X509_NAME_ENTRY_create_by_OBJ(),
X509_NAME_ENTRY_create_by_NID() and X509_NAME_ENTRY_set_data()
are seldom used in practice because B<X509_NAME_ENTRY> structures
are almost always part of B<X509_NAME> structures and the
corresponding B<X509_NAME> functions are typically used to
create and add new entries in a single operation.
The arguments of these functions support similar options to the similarly
named ones of the corresponding B<X509_NAME> functions such as
X509_NAME_add_entry_by_txt(). So for example B<type> can be set to
B<MBSTRING_ASC> but in the case of X509_set_data() the field name must be
set first so the relevant field information can be looked up internally.
=head1 RETURN VALUES
X509_NAME_ENTRY_get_object() returns a valid B<ASN1_OBJECT> structure if it is
set or NULL if an error occurred.
X509_NAME_ENTRY_get_data() returns a valid B<ASN1_STRING> structure if it is set
or NULL if an error occurred.
X509_NAME_ENTRY_set_object() and X509_NAME_ENTRY_set_data() return 1 on success
or 0 on error.
X509_NAME_ENTRY_create_by_txt(), X509_NAME_ENTRY_create_by_NID() and
X509_NAME_ENTRY_create_by_OBJ() return a valid B<X509_NAME_ENTRY> on success or
NULL if an error occurred.
=head1 SEE ALSO
L<ERR_get_error(3)>, L<d2i_X509_NAME(3)>,
L<OBJ_nid2obj(3)>
=head1 COPYRIGHT
Copyright 2002-2018 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
L<https://www.openssl.org/source/license.html>.
=cut
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