After reviewing the source for latest Smack build, it seems client certificates are not supported for clients connecting via BOSH. The BOSHConfiguration class inherits from ConnectionConfiguration, which has attributes for custom SSLContexts and Keystore paths, but never makes use them. Am i missing something, and/or is there a reason client certificates are not supported for BOSH connections?
Smack’s BOSH code is not actively maintained. Patches welcome.