#!/bin/sh

set -e

PREREQ="cryptroot"

prereqs()
{
    echo "$PREREQ"
}

case "$1" in
    prereqs)
        prereqs
        exit 0
        ;;
esac

. /usr/share/initramfs-tools/hook-functions
. /lib/cryptsetup/functions

if [ ! -x "$DESTDIR/lib/cryptsetup/scripts/decrypt_pkcs" ] || [ ! -f "$TABFILE" ]; then
    exit 0
fi

# Fetching local parameters
if [ -f /etc/default/decrypt_pkcs ] ; then
    . /etc/default/decrypt_pkcs
fi 
DECIPHER_COMMAND=${DECIPHER_COMMAND:-/usr/bin/pkcs15-crypt}
SMARTCARD_PRESENCE_COMMAND=${SMARTCARD_PRESENCE_COMMAND:-/usr/bin/opensc-tool}

DECIPHER_MULTI=${DECIPHER_MULTI:-0}

# Hooks for loading smartcard reading software into the initramfs
copy_keys() {
    crypttab_parse_options
    if [ "${CRYPTTAB_OPTION_keyscript-}" = "/lib/cryptsetup/scripts/decrypt_pkcs" ]; then
        if [ -f "$CRYPTTAB_KEY" ]; then
            [ -f "$DESTDIR$CRYPTTAB_KEY" ] || copy_file keyfile "$CRYPTTAB_KEY" || RV=$?
        else
            cryptsetup_message "ERROR: Target $CRYPTTAB_NAME has a non-existing key file $CRYPTTAB_KEY"
            RV=1
        fi
    fi
}

RV=0
#copy default key
crypttab_foreach_entry copy_keys
if [ $DECIPHER_MULTI = 1 ] ; then
    #copy all keys
    mkdir -p "$DESTDIR/${DECIPHER_MULTI_FOLDER}"
    cp -t "$DESTDIR/${DECIPHER_MULTI_FOLDER}" "${DECIPHER_MULTI_FOLDER}/${DECIPHER_MULTI_PATTERN}"*
fi

# Install directories needed by smartcard reading daemon, command, and
# key-script
mkdir -p -- "$DESTDIR/etc/opensc" "$DESTDIR/usr/lib/pcsc" "$DESTDIR/var/run" "$DESTDIR/tmp" "$DESTDIR/etc/default"

# Install pcscd daemon, drivers, conf file
copy_exec /usr/sbin/pcscd
LIBC_DIR="$(ldd /usr/sbin/pcscd | sed -nr 's#.* => (/lib.*)/libc\.so\.[0-9.-]+ \(0x[[:xdigit:]]+\)$#\1#p')"
find -L "$LIBC_DIR" "/usr$LIBC_DIR" -maxdepth 1 \( -name 'libgcc_s.*' -o -name 'libusb-*.so*' -o -name 'libpcsclite.so*' \) -type f | while read so; do
    copy_exec "$so"
done

cp -rt "$DESTDIR/usr/lib" /usr/lib/pcsc
cp -t "$DESTDIR/etc" /etc/reader.conf || true
cp -t "$DESTDIR/etc" /etc/libccid_Info.plist

# Install opensc commands and conf file
copy_exec /usr/bin/opensc-tool
copy_exec $SMARTCARD_PRESENCE_COMMAND
copy_exec $DECIPHER_COMMAND
cp -t "$DESTDIR/etc/opensc" /etc/opensc/opensc.conf
cp -t "$DESTDIR/etc/default" /etc/default/decrypt_pkcs 

# If Multi
if [ $DECIPHER_MULTI = 1 ] ; then
    mkdir -p $DESTDIR/$(dirname "${DECIPHER_MULTI_SCRIPT}")
    cp -t $DESTDIR/$(dirname "${DECIPHER_MULTI_SCRIPT}") "${DECIPHER_MULTI_SCRIPT}"
    chmod +x $DESTDIR/"${DECIPHER_MULTI_SCRIPT}"
    for bin in $DECIPHER_MULTI_SCRIPT_DEPENDS ; do
        copy_exec $bin
    done
fi


exit $RV