X509_get0_uids, X509_ACERT_get0_issuerUID - get certificate and attribute certificate unique identifiers

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       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>.

3.5.0                                              2025-06-04                               X509_GET0_UIDS(3SSL)

X509_get0_uids() was added in OpenSSL 1.1.0.

       X509_ACERT_get0_issuerUID() was added in OpenSSL 3.4.

       X509_get0_uids, X509_ACERT_get0_issuerUID - get certificate and attribute certificate unique identifiers

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

X509_get0_uids() does not return a value.

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

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)

        #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.