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OCSP_cert_to_id(3)                  OpenSSL                 OCSP_cert_to_id(3)



NAME
       OCSP_cert_to_id, OCSP_cert_id_new, OCSP_CERTID_free,
       OCSP_id_issuer_cmp, OCSP_id_cmp, OCSP_id_get0_info - OCSP certificate
       ID utility functions

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/ocsp.h>

        OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst,
                                     X509 *subject, X509 *issuer);

        OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
                                      X509_NAME *issuerName,
                                      ASN1_BIT_STRING *issuerKey,
                                      ASN1_INTEGER *serialNumber);

        void OCSP_CERTID_free(OCSP_CERTID *id);

        int OCSP_id_issuer_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b);
        int OCSP_id_cmp(const OCSP_CERTID *a, const OCSP_CERTID *b);

        int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
                              ASN1_OCTET_STRING **pikeyHash,
                              ASN1_INTEGER **pserial, OCSP_CERTID *cid);

DESCRIPTION
       OCSP_cert_to_id() creates and returns a new OCSP_CERTID structure using
       message digest dgst for certificate subject with issuer issuer. If dgst
       is NULL then SHA1 is used.

       OCSP_cert_id_new() creates and returns a new OCSP_CERTID using dgst and
       issuer name issuerName, issuer key hash issuerKey and serial number
       serialNumber.

       OCSP_CERTID_free() frees up id.

       OCSP_id_cmp() compares OCSP_CERTID a and b.

       OCSP_id_issuer_cmp() compares only the issuer name of OCSP_CERTID a and
       b.

       OCSP_id_get0_info() returns the issuer name hash, hash OID, issuer key
       hash and serial number contained in cid. If any of the values are not
       required the corresponding parameter can be set to NULL.

RETURN VALUES
       OCSP_cert_to_id() and OCSP_cert_id_new() return either a pointer to a
       valid OCSP_CERTID structure or NULL if an error occurred.

       OCSP_id_cmp() and OCSP_id_issuer_cmp() returns zero for a match and
       nonzero otherwise.

       OCSP_CERTID_free() does not return a value.

       OCSP_id_get0_info() returns 1 for success and 0 for failure.

NOTES
       OCSP clients will typically only use OCSP_cert_to_id() or
       OCSP_cert_id_new(): the other functions are used by responder
       applications.

       The values returned by OCSP_id_get0_info() are internal pointers and
       MUST NOT be freed up by an application: they will be freed when the
       corresponding OCSP_CERTID structure is freed.

SEE ALSO
       crypto(7), OCSP_request_add1_nonce(3), OCSP_REQUEST_new(3),
       OCSP_resp_find_status(3), OCSP_response_status(3), OCSP_sendreq_new(3)

COPYRIGHT
       Copyright 2015-2016 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>.



3.0.12                            2023-05-07                OCSP_cert_to_id(3)