ogvt
aka: OpenBSD Gnupg Verification Tool
A pledge(2) and unveil(2)'d tool for verifying GnuPG signatures.
Success
./ogvt -file test/uptime.txt -sig test/uptime.txt.asc -pub test/abieber.pub
Failure
./ogvt -file test/uptime.txt.bad -sig test/uptime.txt.asc -pub test/abieber.pub