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#!/bin/sh
decrypt_gpg () {
echo "Performing GPG symmetric decryption ..." >&2
if ! /lib/cryptsetup/askpass "Enter passphrase for key $1: " | \
/usr/bin/gpg -q --batch --no-options \
--no-random-seed-file --no-default-keyring \
--keyring /dev/null --secret-keyring /dev/null \
--trustdb-name /dev/null --passphrase-fd 0 --decrypt "$1"; then
return 1
fi
return 0
}
if [ ! -x /usr/bin/gpg ]; then
echo "$0: /usr/bin/gpg is not available" >&2
exit 1
fi
if [ -z "$1" ]; then
echo "$0: missing key as argument" >&2
exit 1
fi
decrypt_gpg "$1"
exit $?
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