#!/bin/bash
#
# Copyright (c) 2017 Shawn Rose
# Author: Shawn Rose <shawnandrewrose@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#


PREREQ="cryptroot"
prereqs()
{
     echo "$PREREQ"
}

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

. @initramfstoolsdir@/hook-functions

die() {
    code="$1"
    msg="$2"
    echo "    (ERROR): $msg" >&2
    exit $1
}

find_binary() {
    bin_name="$1"
    resolved=$(command -v ${bin_name})
    [ -z "$resolved" ] && die 1 "Unable to find ${bin_name}"
    echo "$resolved"
}

if [ -n "${FORCE_CLEVIS}" ] && [ "${FORCE_CLEVIS}" != "n" ]; then
    for f in /sbin/cryptsetup /sbin/dmsetup /lib/cryptsetup/askpass; do
        if [ ! -e "${DESTDIR}${f}" ]; then
            die 2 "cryptsetup utility '$f' wasn't found in the generated ramdisk image. "
        fi
    done
fi    


copy_exec @bindir@/clevis-decrypt-tang || die 1 "@bindir@/clevis-decrypt-tang not found"
copy_exec @bindir@/clevis-decrypt-sss || die 1 "@bindir@/clevis-decrypt-sss not found"
copy_exec @bindir@/clevis-decrypt-null || die 1 "@bindir@/clevis-decrypt-null not found"
copy_exec @bindir@/clevis-decrypt || die 1 "@bindir@/clevis-decrypt not found"
copy_exec @bindir@/clevis-luks-common-functions || die 1 "@bindir@/clevis-luks-common-functions not found"
copy_exec @bindir@/clevis-luks-list || die 1 "@bindir@/clevis-luks-list not found"
copy_exec @bindir@/clevis-luks-unlock || die 1 "@bindir@/clevis-luks-unlock not found"
if [ -x @bindir@/clevis-decrypt-tpm2 ]; then
    copy_exec @bindir@/clevis-decrypt-tpm2 || die 1 "@bindir@/clevis-decrypt-tpm2 not found"
    tpm2_creatprimary_bin=$(find_binary "tpm2_createprimary")
    tpm2_unseal_bin=$(find_binary "tpm2_unseal")
    tpm2_load_bin=$(find_binary "tpm2_load")
    tpm2_flushcontext=$(find_binary "tpm2_flushcontext")
    copy_exec "${tpm2_creatprimary_bin}" || die 1 "Unable to copy ${tpm2_creatprimary_bin}" 
    copy_exec "${tpm2_unseal_bin}" || die 1 "Unable to copy ${tpm2_unseal_bin}"
    copy_exec "${tpm2_load_bin}" || die 1 "Unable to copy ${tpm2_load_bin}"
    copy_exec "${tpm2_flushcontext}" || die 1 "Unable to copy ${tpm2_flushcontext}"
    for _LIBRARY in @libdir@/libtss2-tcti-device.so*; do
        if [ -e "${_LIBRARY}" ]; then
            copy_exec "${_LIBRARY}" || die 2 "Unable to copy ${_LIBRARY}"
        fi
    done
    manual_add_modules tpm_crb
    manual_add_modules tpm_tis
fi


luksmeta_bin=$(find_binary "luksmeta")
jose_bin=$(find_binary "jose")
copy_exec "${luksmeta_bin}" || die 2 "Unable to copy ${luksmeta_bin}"
copy_exec "${jose_bin}" || die 2 "Unable to copy ${jose_bin}"


copy_exec @bindir@/clevis || die 1 "@bindir@/clevis not found"
curl_bin=$(find_binary "curl")
awk_bin=$(find_binary "awk")
bash_bin=$(find_binary "bash")
copy_exec "${curl_bin}" || die 2 "Unable to copy ${curl_bin} to initrd image"
copy_exec "${awk_bin}" || die 2 "Unable to copy ${awk_bin} to initrd image"
copy_exec "${bash_bin}" || die 2 "Unable to copy ${bash_bin} to initrd image"

# Copy latest versions of shared objects needed for DNS resolution
for so in $(ldconfig -p | sed -nr 's/^\s*libnss_files\.so\.[0-9]+\s.*=>\s*//p'); do
  copy_exec "${so}"
done
for so in $(ldconfig -p | sed -nr 's/^\s*libnss_dns\.so\.[0-9]+\s.*=>\s*//p'); do
  copy_exec "${so}"
done
