---
name: "gnutls_ocsp_req_add_cert_id"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_ocsp_req_add_cert_id"
---

# gnutls\_ocsp\_req\_add\_cert\_id(3)

API function

## NAME

gnutls\_ocsp\_req\_add\_cert\_id - API function

## SYNOPSIS

**#include \<gnutls/ocsp.h\>**

**int gnutls\_ocsp\_req\_add\_cert\_id(gnutls\_ocsp\_req\_t** *req***, gnutls\_digest\_algorithm\_t** *digest***, const gnutls\_datum\_t \*** *issuer\_name\_hash***, const gnutls\_datum\_t \*** *issuer\_key\_hash***, const gnutls\_datum\_t \*** *serial\_number***);**

## ARGUMENTS

- gnutls\_ocsp\_req\_t req

  should contain a **gnutls\_ocsp\_req\_t** type

- gnutls\_digest\_algorithm\_t digest

  hash algorithm, a **gnutls\_digest\_algorithm\_t** value

- const gnutls\_datum\_t \* issuer\_name\_hash

  hash of issuer's DN

- const gnutls\_datum\_t \* issuer\_key\_hash

  hash of issuer's public key

- const gnutls\_datum\_t \* serial\_number

  serial number of certificate to check

## DESCRIPTION

This function will add another request to the OCSP request for a particular certificate having the issuer name hash of\
  *issuer\_name\_hash* and issuer key hash of  *issuer\_key\_hash* (both hashed using  *digest* ) and serial number  *serial\_number* .

The information needed corresponds to the CertID structure:

\<informalexample\>\<programlisting\> CertID	  ::=     SEQUENCE { hashAlgorithm       AlgorithmIdentifier, issuerNameHash      OCTET STRING, -- Hash of Issuer's DN issuerKeyHash       OCTET STRING, -- Hash of Issuers public key serialNumber	CertificateSerialNumber } \</programlisting\>\</informalexample\>

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error code is returned.

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

## SEE ALSO

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

- https://www.gnutls.org/manual/