As this requires support for Attribute Certificates which is not currently present in OpenSSL neither RFC 5755 is supported. Regards, Tomas On Sat, 2021-09-18 at 11:34 +0800, 215104920 via openssl-users wrote: > Hi. There > Could you give me some help? > Thanks a lot. > > > BRs > Mystic -- Tomáš Mráz No matter how far down the wrong road you've gone, turn back. Turkish proverb [You'll know whether the road is wrong if you carefully listen to your conscience.]