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X509_get0_uids(3)                   OpenSSL                  X509_get0_uids(3)


NAME
       X509_get0_uids, X509_ACERT_get0_issuerUID - get certificate and
       attribute certificate unique identifiers

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 *piuid and *psuid to the issuer and subject
       unique identifiers of certificate x or NULL if the fields are not
       present.

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

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

RETURN VALUES
       X509_get0_uids() does not return a value.

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

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

HISTORY
       X509_get0_uids() was added in OpenSSL 1.1.0.

       X509_ACERT_get0_issuerUID() was added in OpenSSL 3.4.

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
       <https://www.openssl.org/source/license.html>.

3.5.1                             2025-07-01                 X509_get0_uids(3)