contrib: add ctlsock helper scripts

contrib/ctlsock-decrypt.bash

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+ctlsock-encrypt.bash

contrib/ctlsock-encrypt.bash

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+#!/bin/bash -eu
+#
+# Interactively encrypt file names and paths by querying a gocryptfs
+# control socket.
+#
+# Dependencies:
+#  Debian: apt-get install jq netcat-openbsd
+#  Fedora: dnf install jq nmap-ncat
+MYNAME=$(basename $0)
+if [[ $# -ne 1 || $1 == "-h" ]] ; then
+	echo "Usage: $MYNAME SOCKET"
+	exit 1
+fi
+SOCK=$1
+# Bail out early (before even prompting the user) if the socket does
+# not exist
+if [[ ! -S $SOCK ]] ; then
+	echo "'$SOCK' is not a socket" >&2
+	exit 1
+fi
+OPERATION=EncryptPath
+if [[ $MYNAME == "ctlsock-decrypt.bash" ]] ; then
+	OPERATION=DecryptPath
+fi
+while true ; do
+	echo -n "Input path      : "
+	read IN
+	echo -n "Transformed path: "
+	JSON=$(echo "{\"$OPERATION\":\"$IN\"}" | nc -U $SOCK)
+	ENCRYPTED=$(echo $JSON | jq -r '.Result')
+	echo $ENCRYPTED
+	echo    "Complete reply  : $JSON"
+	echo
+done