On Thu, May 11, 2023 at 11:26:25AM -0400, Robert Moskowitz wrote: > In rfc5280: > > IssuerAltName ::= GeneralNames > > GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName > > GeneralName ::= CHOICE { > otherName [0] OtherName, > rfc822Name [1] IA5String, > dNSName [2] IA5String, > x400Address [3] ORAddress, > directoryName [4] Name, > ediPartyName [5] EDIPartyName, > uniformResourceIdentifier [6] IA5String, > iPAddress [7] OCTET STRING, > registeredID [8] OBJECT IDENTIFIER } > > So since I want a DET as IssuerAltName (e.g. > 20010030000000052aeb9adc1ce8b1ecO), it seems that iPAddress is the only > thing that works. So in the config file, I tried: No, you would use "otherName", which is a combination of an OID and corresponding data. You would register (if there isn't one already) a suitable OID for DET-values, and choose a suitable DET encoding to go with that OID. -- Viktor.