We are testing XCOM with SystemSSL, after we changed SSL_VERSION to SYSTEM the test transfer failed with message:
XCOMM1510E System SSL: gsk_secure_socket_init: RC = 435: Reason = Certification authority is unknown
Release : 12.0
Component : XCOM Data Transport for z/OS
Per IBM the meaning of the message is:
Return code 435 from gsk_secure_socket_init means: Certification authority is unknown.
Explanation: The key database does not contain a certificate for the certification authority.
User response: Obtain the certificate for the certification authority and add it to the key database. When using a SAF key ring, the CA certificate must be TRUSTed.
You will need to address this with your Security Admin.