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.\"
.IX Title "OCSP_CERT_TO_ID 3"
.TH OCSP_CERT_TO_ID 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "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
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBOCSP_cert_to_id()\fR creates and returns a new \fB\s-1OCSP_CERTID\s0\fR structure using
message digest \fBdgst\fR for certificate \fBsubject\fR with issuer \fBissuer\fR. If
\&\fBdgst\fR is \fB\s-1NULL\s0\fR then \s-1SHA1\s0 is used.
.PP
\&\fBOCSP_cert_id_new()\fR creates and returns a new \fB\s-1OCSP_CERTID\s0\fR using \fBdgst\fR and
issuer name \fBissuerName\fR, issuer key hash \fBissuerKey\fR and serial number
\&\fBserialNumber\fR.
.PP
\&\fBOCSP_CERTID_free()\fR frees up \fBid\fR.
.PP
\&\fBOCSP_id_cmp()\fR compares \fB\s-1OCSP_CERTID\s0\fR \fBa\fR and \fBb\fR.
.PP
\&\fBOCSP_id_issuer_cmp()\fR compares only the issuer name of \fB\s-1OCSP_CERTID\s0\fR \fBa\fR and \fBb\fR.
.PP
\&\fBOCSP_id_get0_info()\fR returns the issuer name hash, hash \s-1OID,\s0 issuer key hash and
serial number contained in \fBcid\fR. If any of the values are not required the
corresponding parameter can be set to \fB\s-1NULL\s0\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBOCSP_cert_to_id()\fR and \fBOCSP_cert_id_new()\fR return either a pointer to a valid
\&\fB\s-1OCSP_CERTID\s0\fR structure or \fB\s-1NULL\s0\fR if an error occurred.
.PP
\&\fBOCSP_id_cmp()\fR and \fBOCSP_id_issuer_cmp()\fR returns zero for a match and nonzero
otherwise.
.PP
\&\fBOCSP_CERTID_free()\fR does not return a value.
.PP
\&\fBOCSP_id_get0_info()\fR returns 1 for success and 0 for failure.
.SH "NOTES"
.IX Header "NOTES"
\&\s-1OCSP\s0 clients will typically only use \fBOCSP_cert_to_id()\fR or \fBOCSP_cert_id_new()\fR:
the other functions are used by responder applications.
.PP
The values returned by \fBOCSP_id_get0_info()\fR are internal pointers and \fB\s-1MUST
NOT\s0\fR be freed up by an application: they will be freed when the corresponding
\&\fB\s-1OCSP_CERTID\s0\fR structure is freed.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBcrypto\fR\|(7),
\&\fBOCSP_request_add1_nonce\fR\|(3),
\&\fBOCSP_REQUEST_new\fR\|(3),
\&\fBOCSP_resp_find_status\fR\|(3),
\&\fBOCSP_response_status\fR\|(3),
\&\fBOCSP_sendreq_new\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.