gnutls_x509_dn_oid_known - return true if the given OID is known
int gnutls_x509_dn_oid_known(const char * oid);
const char * oid
holds an Object Identifier in a null terminated string
This function will inform about known DN OIDs. This is useful since
functions like gnutls_x509_crt_set_dn_by_oid() use the information on
known OIDs to properly encode their input. Object Identifiers that are
not known are not encoded by these functions, and their input is stored
directly into the ASN.1 structure. In that case of unknown OIDs, you
have the responsibility of DER encoding your data.
1 on known OIDs and 0 otherwise.
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