=pod

=head1 NAME

X509_get0_uids, X509_ACERT_get0_issuerUID
- get certificate and attribute certificate unique identifiers

=head1 SYNOPSIS

 #include <openssl/x509.h>

 void X509_get0_uids(const X509 *x, const ASN1_BIT_STRING **piuid,
                     const ASN1_BIT_STRING **psuid);

 #include <openssl/x509_acert.h>

 ASN1_BIT_STRING *X509_ACERT_get0_issuerUID(X509_ACERT *x);
=head1 DESCRIPTION

X509_get0_uids() sets B<*piuid> and B<*psuid> to the issuer and subject unique
identifiers of certificate B<x> or NULL if the fields are not present.

X509_ACERT_get0_issuerUID() returns the issuer unique identifier of the
attribute certificate B<x> or NULL if the field is not present.

=head1 NOTES

The issuer and subject unique identifier fields are very rarely encountered in
practice outside test cases.

=head1 RETURN VALUES

X509_get0_uids() does not return a value.

X509_ACERT_get0_issuerUID() returns a unique identifier on success or NULL
on failure.

=head1 SEE ALSO

L<d2i_X509(3)>,
L<ERR_get_error(3)>,
L<X509_CRL_get0_by_serial(3)>,
L<X509_get0_signature(3)>,
L<X509_get_ext_d2i(3)>,
L<X509_get_extension_flags(3)>,
L<X509_get_pubkey(3)>,
L<X509_get_subject_name(3)>,
L<X509_get_version(3)>,
L<X509_NAME_add_entry_by_txt(3)>,
L<X509_NAME_ENTRY_get_object(3)>,
L<X509_NAME_get_index_by_NID(3)>,
L<X509_NAME_print_ex(3)>,
L<X509_new(3)>,
L<X509_sign(3)>,
L<X509V3_get_d2i(3)>,
L<X509_verify_cert(3)>

=head1 HISTORY

X509_get0_uids() was added in OpenSSL 1.1.0.

X509_ACERT_get0_issuerUID() was added in OpenSSL 3.4.

=head1 COPYRIGHT

Copyright 2015-2024 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
L<https://www.openssl.org/source/license.html>.

=cut
