XCOMM1510E System SSL: gsk_secure_socket_init: RC = 9 "Cryptographic processing error "

Products

• XCOM Data Transport
• XCOM Data Transport - Windows
• XCOM Data Transport - z/OS
• XCOM Data Transport - Linux PC

Issue/Introduction

Setting up new XCOM for Windows to Mainframe (z/OS) secure transfer and receive error:

XCOMM1510E System SSL: gsk_secure_socket_init: RC = 9: Reason = Cryptographic processing error

Environment

XCOM™ Data Transport® for Windows 11.6 SP03, 12.0.
XCOM™ Data Transport® for z/OS 12.0

Cause

The XCOM for Windows configSSL.cnf file had default setting
# Mandatory, YES/NO (if NO, DH will be used)
[RSAKEY]
RECEIVE_SIDE = NO

which means DH (Diffie–Hellman) would be used.
The user's Mainframe side does not support Diffie–Hellman.

Resolution

Changed RSAKEY to YES to resolve the problem:
[RSAKEY]
RECEIVE_SIDE = YES

Additional Information

Use DH Key Exchanges for TLS/SSL Communication