describe DC save file formats; add decrypt/encrypt actions

tests/decrypt-vms-save.test.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+set -e
+
+EXECUTABLE="$1"
+if [ -z "$EXECUTABLE" ]; then
+  EXECUTABLE="./newserv"
+fi
+
+DIR="tests/saves-vms"
+
+echo "... decrypt v1 charfile"
+$EXECUTABLE decrypt-vms-save $DIR/d1-sys.vms $DIR/d1-sys.vmsd --serial-number=77777777
+diff $DIR/d1-sys-expected.vmsd $DIR/d1-sys.vmsd
+
+echo "... decrypt v2 charfile"
+$EXECUTABLE decrypt-vms-save $DIR/e1-sys.vms $DIR/e1-sys.vmsd --serial-number=DBA61FAC
+diff $DIR/e1-sys-expected.vmsd $DIR/e1-sys.vmsd
+
+echo "... decrypt v1/v2 guildfile"
+$EXECUTABLE decrypt-vms-save $DIR/a1-2gc.vms $DIR/a1-2gc.vmsd --serial-number=DBA61FAC
+diff $DIR/a1-2gc-expected.vmsd $DIR/a1-2gc.vmsd
+
+echo "... clean up"
+rm -f $DIR/d1-sys.vmsd $DIR/e1-sys.vmsd $DIR/a1-2gc.vmsd