Sample abstract code, you should see this extension in your x509 when you use the openssl x509 -in mycsr -text
You have to register an OID, I just picked one at random. os =ASN1_OCTET_STRING_new(); nid = OBJ_create("1.3.18.0.2.10.8", "myalias", "myaliasname"); ASN1_OCTET_STRING_set(os, "ABC test", 8); ret = X509_EXTENSION_create_by_NID( NULL, nid, 0, os ); X509_add_ext(x,ret,-1) hope this helps. -- View this message in context: http://openssl.6102.n7.nabble.com/Adding-a-custom-extension-to-a-CSR-tp47446p47514.html Sent from the OpenSSL - User mailing list archive at Nabble.com. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org