Hi, OFB and CFB cipher modes have been broken for a long time, see trac ticket #89 (https://community.openvpn.net/openvpn/ticket/89). Commit be46a2c enables support for OFB and CFB again, but leaves some minor problems around. The following patches resolve the remaining issues.
Patches 1-3 fix some minor issues I encountered while testing OFB/CFB. Patch 4 extends the t_lpback tests to prevent further regression. -Steffan
