mirror of
https://github.com/moparisthebest/cryptsetup-multidisk-ssh
synced 2024-12-22 07:28:49 -05:00
First commit, supports multiple devices via cryptdevice=, cryptdevice1= etc
This commit is contained in:
parent
4a9b980eb5
commit
fbab5a5348
243
encrypt_hook
243
encrypt_hook
@ -4,136 +4,157 @@ run_hook() {
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modprobe -a -q dm-crypt >/dev/null 2>&1
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modprobe -a -q dm-crypt >/dev/null 2>&1
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[ "${quiet}" = "y" ] && CSQUIET=">/dev/null"
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[ "${quiet}" = "y" ] && CSQUIET=">/dev/null"
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# Get keyfile if specified
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count=0
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ckeyfile="/crypto_keyfile.bin"
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while true
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if [ -n "$cryptkey" ]; then
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do
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IFS=: read ckdev ckarg1 ckarg2 <<EOF
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num=$count
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[ $count -eq 0 ] && num=""
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cryptdevice_name="cryptdevice$num"
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#cryptdevice=${!cryptdevice_name} # this would work with bash
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cryptdevice="$(eval echo "$""$cryptdevice_name")"
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cryptkey_name="cryptkey$num"
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cryptkey="$(eval echo "$""$cryptkey_name")"
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crypto_name="crypto$num"
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crypto="$(eval echo "$""$crypto_name")"
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if [ -n "${cryptdevice}" ]; then
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DEPRECATED_CRYPT=0
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IFS=: read cryptdev cryptname cryptoptions <<EOF
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$cryptdevice
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EOF
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else
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if [ $count -ne 0 ]; then
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break;
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fi
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DEPRECATED_CRYPT=1
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cryptdev="${root}"
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cryptname="root"
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fi
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# Get keyfile if specified
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ckeyfile="/crypto_keyfile.bin"
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if [ -n "$cryptkey" ]; then
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IFS=: read ckdev ckarg1 ckarg2 <<EOF
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$cryptkey
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$cryptkey
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EOF
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EOF
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if [ "$ckdev" = "rootfs" ]; then
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if [ "$ckdev" = "rootfs" ]; then
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ckeyfile=$ckarg1
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ckeyfile=$ckarg1
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elif resolved=$(resolve_device "${ckdev}" ${rootdelay}); then
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elif resolved=$(resolve_device "${ckdev}" ${rootdelay}); then
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case ${ckarg1} in
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case ${ckarg1} in
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*[!0-9]*)
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*[!0-9]*)
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# Use a file on the device
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# Use a file on the device
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# ckarg1 is not numeric: ckarg1=filesystem, ckarg2=path
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# ckarg1 is not numeric: ckarg1=filesystem, ckarg2=path
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mkdir /ckey
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mkdir /ckey
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mount -r -t "$ckarg1" "$resolved" /ckey
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mount -r -t "$ckarg1" "$resolved" /ckey
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dd if="/ckey/$ckarg2" of="$ckeyfile" >/dev/null 2>&1
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dd if="/ckey/$ckarg2" of="$ckeyfile" >/dev/null 2>&1
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umount /ckey
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umount /ckey
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;;
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*)
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# Read raw data from the block device
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# ckarg1 is numeric: ckarg1=offset, ckarg2=length
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dd if="$resolved" of="$ckeyfile" bs=1 skip="$ckarg1" count="$ckarg2" >/dev/null 2>&1
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;;
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esac
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fi
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[ ! -f ${ckeyfile} ] && echo "Keyfile could not be opened. Reverting to passphrase."
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fi
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warn_deprecated() {
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echo "The syntax 'root=${root}' where '${root}' is an encrypted volume is deprecated"
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echo "Use 'cryptdevice=${root}:root root=/dev/mapper/root' instead."
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}
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for cryptopt in ${cryptoptions//,/ }; do
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case ${cryptopt} in
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allow-discards)
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cryptargs="${cryptargs} --allow-discards"
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;;
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;;
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*)
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*)
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# Read raw data from the block device
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echo "Encryption option '${cryptopt}' not known, ignoring." >&2
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# ckarg1 is numeric: ckarg1=offset, ckarg2=length
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dd if="$resolved" of="$ckeyfile" bs=1 skip="$ckarg1" count="$ckarg2" >/dev/null 2>&1
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;;
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;;
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esac
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esac
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fi
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done
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[ ! -f ${ckeyfile} ] && echo "Keyfile could not be opened. Reverting to passphrase."
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fi
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if [ -n "${cryptdevice}" ]; then
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if resolved=$(resolve_device "${cryptdev}" ${rootdelay}); then
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DEPRECATED_CRYPT=0
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if cryptsetup isLuks ${resolved} >/dev/null 2>&1; then
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IFS=: read cryptdev cryptname cryptoptions <<EOF
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[ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated
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$cryptdevice
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dopassphrase=1
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EOF
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# If keyfile exists, try to use that
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else
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if [ -f ${ckeyfile} ]; then
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DEPRECATED_CRYPT=1
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if eval cryptsetup --key-file ${ckeyfile} open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}; then
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cryptdev="${root}"
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dopassphrase=0
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cryptname="root"
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else
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fi
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echo "Invalid keyfile. Reverting to passphrase."
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fi
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fi
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# Ask for a passphrase
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if [ ${dopassphrase} -gt 0 ]; then
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echo ""
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echo "A password is required to access the ${cryptname} volume:"
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warn_deprecated() {
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#loop until we get a real password
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echo "The syntax 'root=${root}' where '${root}' is an encrypted volume is deprecated"
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while ! eval cryptsetup open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}; do
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echo "Use 'cryptdevice=${root}:root root=/dev/mapper/root' instead."
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sleep 2;
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}
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done
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fi
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for cryptopt in ${cryptoptions//,/ }; do
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if [ -e "/dev/mapper/${cryptname}" ]; then
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case ${cryptopt} in
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if [ ${DEPRECATED_CRYPT} -eq 1 ]; then
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allow-discards)
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export root="/dev/mapper/root"
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cryptargs="${cryptargs} --allow-discards"
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fi
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;;
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*)
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echo "Encryption option '${cryptopt}' not known, ignoring." >&2
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;;
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esac
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done
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if resolved=$(resolve_device "${cryptdev}" ${rootdelay}); then
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if cryptsetup isLuks ${resolved} >/dev/null 2>&1; then
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[ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated
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dopassphrase=1
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# If keyfile exists, try to use that
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if [ -f ${ckeyfile} ]; then
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if eval cryptsetup --key-file ${ckeyfile} open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}; then
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dopassphrase=0
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else
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else
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echo "Invalid keyfile. Reverting to passphrase."
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err "Password succeeded, but ${cryptname} creation failed, aborting..."
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exit 1
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fi
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fi
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fi
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elif [ -n "${crypto}" ]; then
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# Ask for a passphrase
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[ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated
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if [ ${dopassphrase} -gt 0 ]; then
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msg "Non-LUKS encrypted device found..."
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echo ""
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if echo "$crypto" | awk -F: '{ exit(NF == 5) }'; then
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echo "A password is required to access the ${cryptname} volume:"
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err "Verify parameter format: crypto=hash:cipher:keysize:offset:skip"
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err "Non-LUKS decryption not attempted..."
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#loop until we get a real password
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return 1
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while ! eval cryptsetup open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}; do
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sleep 2;
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done
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fi
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if [ -e "/dev/mapper/${cryptname}" ]; then
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if [ ${DEPRECATED_CRYPT} -eq 1 ]; then
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export root="/dev/mapper/root"
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fi
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fi
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else
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exe="cryptsetup open --type plain $resolved $cryptname $cryptargs"
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err "Password succeeded, but ${cryptname} creation failed, aborting..."
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IFS=: read c_hash c_cipher c_keysize c_offset c_skip <<EOF
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exit 1
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fi
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elif [ -n "${crypto}" ]; then
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[ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated
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msg "Non-LUKS encrypted device found..."
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if echo "$crypto" | awk -F: '{ exit(NF == 5) }'; then
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err "Verify parameter format: crypto=hash:cipher:keysize:offset:skip"
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err "Non-LUKS decryption not attempted..."
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return 1
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fi
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exe="cryptsetup open --type plain $resolved $cryptname $cryptargs"
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IFS=: read c_hash c_cipher c_keysize c_offset c_skip <<EOF
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$crypto
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$crypto
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EOF
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EOF
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[ -n "$c_hash" ] && exe="$exe --hash '$c_hash'"
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[ -n "$c_hash" ] && exe="$exe --hash '$c_hash'"
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[ -n "$c_cipher" ] && exe="$exe --cipher '$c_cipher'"
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[ -n "$c_cipher" ] && exe="$exe --cipher '$c_cipher'"
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[ -n "$c_keysize" ] && exe="$exe --key-size '$c_keysize'"
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[ -n "$c_keysize" ] && exe="$exe --key-size '$c_keysize'"
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[ -n "$c_offset" ] && exe="$exe --offset '$c_offset'"
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[ -n "$c_offset" ] && exe="$exe --offset '$c_offset'"
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[ -n "$c_skip" ] && exe="$exe --skip '$c_skip'"
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[ -n "$c_skip" ] && exe="$exe --skip '$c_skip'"
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if [ -f "$ckeyfile" ]; then
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if [ -f "$ckeyfile" ]; then
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exe="$exe --key-file $ckeyfile"
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exe="$exe --key-file $ckeyfile"
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else
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else
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exe="$exe --verify-passphrase"
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exe="$exe --verify-passphrase"
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echo ""
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echo ""
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echo "A password is required to access the ${cryptname} volume:"
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echo "A password is required to access the ${cryptname} volume:"
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fi
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fi
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eval "$exe $CSQUIET"
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eval "$exe $CSQUIET"
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if [ $? -ne 0 ]; then
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if [ $? -ne 0 ]; then
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err "Non-LUKS device decryption failed. verify format: "
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err "Non-LUKS device decryption failed. verify format: "
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err " crypto=hash:cipher:keysize:offset:skip"
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err " crypto=hash:cipher:keysize:offset:skip"
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exit 1
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exit 1
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fi
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fi
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if [ -e "/dev/mapper/${cryptname}" ]; then
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if [ -e "/dev/mapper/${cryptname}" ]; then
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if [ ${DEPRECATED_CRYPT} -eq 1 ]; then
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if [ ${DEPRECATED_CRYPT} -eq 1 ]; then
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export root="/dev/mapper/root"
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export root="/dev/mapper/root"
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fi
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else
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err "Password succeeded, but ${cryptname} creation failed, aborting..."
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exit 1
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fi
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fi
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else
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else
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err "Password succeeded, but ${cryptname} creation failed, aborting..."
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err "Failed to open encryption mapping: The device ${cryptdev} is not a LUKS volume and the crypto= paramater was not specified."
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exit 1
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fi
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fi
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else
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err "Failed to open encryption mapping: The device ${cryptdev} is not a LUKS volume and the crypto= paramater was not specified."
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fi
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fi
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fi
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rm -f ${ckeyfile}
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rm -f ${ckeyfile}
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count=$((count + 1))
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done
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}
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}
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# vim: set ft=sh ts=4 sw=4 et:
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# vim: set ft=sh ts=4 sw=4 et:
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