cfg/bin/vault-gpg

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#!/bin/bash
KEY=$1
if [ -z "${KEY}" ] || ! (gpg2 --list-secret-keys | grep -q ${KEY}); then
echo "No key given or no secret key found for '${KEY}'"
exit 2
fi
# Read password for this key
PWD=$(vault read --field=passphrase "/secret/gpg-key/${KEY}")
if [ -z "${PWD}" ]; then
echo "Could not read passphrase from vault."
exit 2
fi
HEXPWD=$(python -c "print '${PWD}'.encode('hex')")
# Get keygrip of secret key
for KEYGRIP in $(gpg2 --with-keygrip -k ${KEY} | grep Keygrip | cut -d '=' -f 2 | xargs); do
# Set password for keygrip
if ! ( gpg-connect-agent -q "PRESET_PASSPHRASE ${KEYGRIP} -1 ${HEXPWD}" /bye >/dev/null 2>&1 ); then
echo "An error occurred while caching password in GPG agent"
exit 1
fi
done
echo "Successfully cached password in GPG agent"
exit 0