#!/bin/bash

# Go to home directory for sure
pushd $HOME >/dev/null

# Kill gpg-agent
pkill gpg-agent

# Rewrite gpg-agent configuration
cat > ~/.gnupg/gpg-agent.conf <<EOF
keyserver-options auto-key-retrieve
default-cache-ttl 4320000
max-cache-ttl 8640000
allow-loopback-pinentry
EOF

# Start gpg-agent
gpg-agent


# Create dummy file
_dummyfile=`mktemp`
echo "foobar" > "${_dummyfile}"

# Cache password in gpg-agent by signing dummy file
cat ~/passphrase.txt | env -i gpg \
	--pinentry-mode loopback --passphrase-fd 0 \
	--no-tty --batch --yes \
	--detach-sig --output "${_dummyfile}.sig" "${_dummyfile}"

# Verify given signature
env -i gpg --verify \
	"${_dummyfile}.sig" "${_dummyfile}"

echo $?

rm "${_dummyfile}" "${_dummyfile}.sig"
popd >/dev/null