--- name: "gnutls_x509_crq_get_extension_by_oid2" 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_x509_crq_get_extension_by_oid2" --- # gnutls\_x509\_crq\_get\_extension\_by\_oid2(3) API function ## NAME gnutls\_x509\_crq\_get\_extension\_by\_oid2 - API function ## SYNOPSIS **#include \** **int gnutls\_x509\_crq\_get\_extension\_by\_oid2(gnutls\_x509\_crq\_t** *crq***, const char \*** *oid***, unsigned** *indx***, gnutls\_datum\_t \*** *output***, unsigned int \*** *critical***);** ## ARGUMENTS - gnutls\_x509\_crq\_t crq should contain a **gnutls\_x509\_crq\_t** type - const char \* oid holds an Object Identifier in a null terminated string - unsigned indx In case multiple same OIDs exist in the extensions, this specifies which to get. Use (0) to get the first one. - gnutls\_datum\_t \* output will hold the allocated extension data - unsigned int \* critical will be non-zero if the extension is marked as critical ## DESCRIPTION This function will return the extension specified by the OID in the certificate. The extensions will be returned as binary data DER encoded, in the provided buffer. ## RETURNS On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error code in case of an error. If the certificate does not contain the specified extension **GNUTLS\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE** will be returned. ## SINCE 3\.3.8 ## REPORTING BUGS Report bugs to \.\ 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/