On Jun 17, 2019, at 8:09 AM, Tobias Wolf <wolf.tob...@gmx.net> wrote: > there already a function available? In fact I´d like to provide a > STACK(X509)* as a parameter and get the pem or der encoded asn1 structure > back.
Assuming you've already assembled the list of certificates you want to encode, I think you can use the generic ASN.1 routines (see the docs in doc/man3/X509_dup.pod; I'm not sure why that's where they live) to define the encoded structure of the PkiPath; and use the ASN1_SEQUENCE_OF macro in that definition. See also the "asn1t.h" header. I don't remember how to actually do this, but perhaps this will point you in a useful direction.
