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author | Nicolás Reynolds <fauno@kiwwwi.com.ar> | 2012-05-28 17:11:34 -0300 |
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committer | Nicolás Reynolds <fauno@kiwwwi.com.ar> | 2012-05-28 17:11:34 -0300 |
commit | 15715eb69d409c77752f91aa6d8080ecc0262af6 (patch) | |
tree | f42b2c8578ff374221f7997920c4b3f5ae1f8202 /core/cryptsetup/encrypt_hook | |
parent | 9869139d358088255d11213f0eb3bd91c5ac25a3 (diff) | |
parent | 669fbc2a8d1763b4919c25957dd0184a195b7826 (diff) |
Merge branch 'master' of ssh://gparabola/srv/git/abslibre-mips64el
Diffstat (limited to 'core/cryptsetup/encrypt_hook')
-rw-r--r-- | core/cryptsetup/encrypt_hook | 249 |
1 files changed, 119 insertions, 130 deletions
diff --git a/core/cryptsetup/encrypt_hook b/core/cryptsetup/encrypt_hook index 956b18023..0f35782c6 100644 --- a/core/cryptsetup/encrypt_hook +++ b/core/cryptsetup/encrypt_hook @@ -1,148 +1,137 @@ -# vim: set ft=sh: -# TODO this one needs some work to work with lots of different -# encryption schemes -run_hook () -{ - /sbin/modprobe -a -q dm-crypt >/dev/null 2>&1 - if [ -e "/sys/class/misc/device-mapper" ]; then - if [ ! -e "/dev/mapper/control" ]; then - mkdir /dev/mapper - mknod "/dev/mapper/control" c $(cat /sys/class/misc/device-mapper/dev | sed 's|:| |') - fi - [ "${quiet}" = "y" ] && CSQUIET=">/dev/null" - - # Get keyfile if specified - ckeyfile="/crypto_keyfile.bin" - if [ "x${cryptkey}" != "x" ]; then - ckdev="$(echo "${cryptkey}" | cut -d: -f1)" - ckarg1="$(echo "${cryptkey}" | cut -d: -f2)" - ckarg2="$(echo "${cryptkey}" | cut -d: -f3)" - if poll_device "${ckdev}" ${rootdelay}; then - case ${ckarg1} in - *[!0-9]*) - # Use a file on the device - # ckarg1 is not numeric: ckarg1=filesystem, ckarg2=path - mkdir /ckey - mount -r -t ${ckarg1} ${ckdev} /ckey - dd if=/ckey/${ckarg2} of=${ckeyfile} >/dev/null 2>&1 - umount /ckey - ;; - *) - # Read raw data from the block device - # ckarg1 is numeric: ckarg1=offset, ckarg2=length - dd if=${ckdev} of=${ckeyfile} bs=1 skip=${ckarg1} count=${ckarg2} >/dev/null 2>&1 - ;; - esac - fi - [ ! -f ${ckeyfile} ] && echo "Keyfile could not be opened. Reverting to passphrase." - fi +#!/usr/bin/ash - if [ -n "${cryptdevice}" ]; then - DEPRECATED_CRYPT=0 - cryptdev="$(echo "${cryptdevice}" | cut -d: -f1)" - cryptname="$(echo "${cryptdevice}" | cut -d: -f2)" - cryptoptions="$(echo "${cryptdevice}" | cut -d: -f3)" - else - DEPRECATED_CRYPT=1 - cryptdev="${root}" - cryptname="root" - fi +run_hook() { + modprobe -a -q dm-crypt >/dev/null 2>&1 + [ "${quiet}" = "y" ] && CSQUIET=">/dev/null" - warn_deprecated() { - echo "The syntax 'root=${root}' where '${root}' is an encrypted volume is deprecated" - echo "Use 'cryptdevice=${root}:root root=/dev/mapper/root' instead." - } - - OLDIFS="${IFS}" - IFS="," - for cryptopt in ${cryptoptions}; do - case ${cryptopt} in - allow-discards) - echo "Enabling TRIM/discard support." - cryptargs="${cryptargs} --allow-discards" + # Get keyfile if specified + ckeyfile="/crypto_keyfile.bin" + if [ -n "$cryptkey" ]; then + IFS=: read ckdev ckarg1 ckarg2 <<EOF +$cryptkey +EOF + if poll_device "${ckdev}" ${rootdelay}; then + case ${ckarg1} in + *[!0-9]*) + # Use a file on the device + # ckarg1 is not numeric: ckarg1=filesystem, ckarg2=path + mkdir /ckey + mount -r -t "$ckarg1" "$ckdev" /ckey + dd if="/ckey/$ckarg2" of="$ckeyfile" >/dev/null 2>&1 + umount /ckey ;; *) - echo "Encryption option '${cryptopt}' not known, ignoring." >&2 + # Read raw data from the block device + # ckarg1 is numeric: ckarg1=offset, ckarg2=length + dd if="$ckdev" of="$ckeyfile" bs=1 skip="$ckarg1" count="$ckarg2" >/dev/null 2>&1 ;; esac - done - IFS="${OLDIFS}" + fi + [ ! -f ${ckeyfile} ] && echo "Keyfile could not be opened. Reverting to passphrase." + fi - if poll_device "${cryptdev}" ${rootdelay}; then - if /sbin/cryptsetup isLuks ${cryptdev} >/dev/null 2>&1; then - [ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated - dopassphrase=1 - # If keyfile exists, try to use that - if [ -f ${ckeyfile} ]; then - if eval /sbin/cryptsetup --key-file ${ckeyfile} luksOpen ${cryptdev} ${cryptname} ${cryptargs} ${CSQUIET}; then - dopassphrase=0 - else - echo "Invalid keyfile. Reverting to passphrase." - fi - fi - # Ask for a passphrase - if [ ${dopassphrase} -gt 0 ]; then - echo "" - echo "A password is required to access the ${cryptname} volume:" + if [ -n "${cryptdevice}" ]; then + DEPRECATED_CRYPT=0 + IFS=: read cryptdev cryptname cryptoptions <<EOF +$cryptdevice +EOF + else + DEPRECATED_CRYPT=1 + cryptdev="${root}" + cryptname="root" + fi - #loop until we get a real password - while ! eval /sbin/cryptsetup luksOpen ${cryptdev} ${cryptname} ${cryptargs} ${CSQUIET}; do - sleep 2; - done - fi - if [ -e "/dev/mapper/${cryptname}" ]; then - if [ ${DEPRECATED_CRYPT} -eq 1 ]; then - export root="/dev/mapper/root" - fi - else - err "Password succeeded, but ${cryptname} creation failed, aborting..." - exit 1 - fi - elif [ -n "${crypto}" ]; then - [ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated - msg "Non-LUKS encrypted device found..." - if [ $# -ne 5 ]; then - err "Verify parameter format: crypto=hash:cipher:keysize:offset:skip" - err "Non-LUKS decryption not attempted..." - return 1 - fi - exe="/sbin/cryptsetup create ${cryptname} ${cryptdev} ${cryptargs}" - tmp=$(echo "${crypto}" | cut -d: -f1) - [ -n "${tmp}" ] && exe="${exe} --hash \"${tmp}\"" - tmp=$(echo "${crypto}" | cut -d: -f2) - [ -n "${tmp}" ] && exe="${exe} --cipher \"${tmp}\"" - tmp=$(echo "${crypto}" | cut -d: -f3) - [ -n "${tmp}" ] && exe="${exe} --key-size \"${tmp}\"" - tmp=$(echo "${crypto}" | cut -d: -f4) - [ -n "${tmp}" ] && exe="${exe} --offset \"${tmp}\"" - tmp=$(echo "${crypto}" | cut -d: -f5) - [ -n "${tmp}" ] && exe="${exe} --skip \"${tmp}\"" - if [ -f ${ckeyfile} ]; then - exe="${exe} --key-file ${ckeyfile}" + warn_deprecated() { + echo "The syntax 'root=${root}' where '${root}' is an encrypted volume is deprecated" + echo "Use 'cryptdevice=${root}:root root=/dev/mapper/root' instead." + } + + for cryptopt in ${cryptoptions//,/ }; do + case ${cryptopt} in + allow-discards) + echo "Enabling TRIM/discard support." + cryptargs="${cryptargs} --allow-discards" + ;; + *) + echo "Encryption option '${cryptopt}' not known, ignoring." >&2 + ;; + esac + done + + if poll_device "${cryptdev}" ${rootdelay}; then + if cryptsetup isLuks ${cryptdev} >/dev/null 2>&1; then + [ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated + dopassphrase=1 + # If keyfile exists, try to use that + if [ -f ${ckeyfile} ]; then + if eval cryptsetup --key-file ${ckeyfile} luksOpen ${cryptdev} ${cryptname} ${cryptargs} ${CSQUIET}; then + dopassphrase=0 else - exe="${exe} --verify-passphrase" - echo "" - echo "A password is required to access the ${cryptname} volume:" + echo "Invalid keyfile. Reverting to passphrase." fi - eval "${exe} ${CSQUIET}" + fi + # Ask for a passphrase + if [ ${dopassphrase} -gt 0 ]; then + echo "" + echo "A password is required to access the ${cryptname} volume:" - if [ $? -ne 0 ]; then - err "Non-LUKS device decryption failed. verify format: " - err " crypto=hash:cipher:keysize:offset:skip" - exit 1 + #loop until we get a real password + while ! eval cryptsetup luksOpen ${cryptdev} ${cryptname} ${cryptargs} ${CSQUIET}; do + sleep 2; + done + fi + if [ -e "/dev/mapper/${cryptname}" ]; then + if [ ${DEPRECATED_CRYPT} -eq 1 ]; then + export root="/dev/mapper/root" fi - if [ -e "/dev/mapper/${cryptname}" ]; then - if [ ${DEPRECATED_CRYPT} -eq 1 ]; then - export root="/dev/mapper/root" - fi - else - err "Password succeeded, but ${cryptname} creation failed, aborting..." - exit 1 + else + err "Password succeeded, but ${cryptname} creation failed, aborting..." + exit 1 + fi + elif [ -n "${crypto}" ]; then + [ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated + msg "Non-LUKS encrypted device found..." + if echo "$crypto" | awk -F: '{ exit(NF == 5) }'; then + err "Verify parameter format: crypto=hash:cipher:keysize:offset:skip" + err "Non-LUKS decryption not attempted..." + return 1 + fi + exe="cryptsetup create $cryptname $cryptdev $cryptargs" + IFS=: read c_hash c_cipher c_keysize c_offset c_skip <<EOF +$crypto +EOF + [ -n "$c_hash" ] && exe="$exe --hash '$c_hash'" + [ -n "$c_cipher" ] && exe="$exe --cipher '$c_cipher'" + [ -n "$c_keysize" ] && exe="$exe --key-size '$c_keysize'" + [ -n "$c_offset" ] && exe="$exe --offset '$c_offset'" + [ -n "$c_skip" ] && exe="$exe --skip '$c_skip'" + if [ -f "$ckeyfile" ]; then + exe="$exe --key-file $ckeyfile" + else + exe="$exe --verify-passphrase" + echo "" + echo "A password is required to access the ${cryptname} volume:" + fi + eval "$exe $CSQUIET" + + if [ $? -ne 0 ]; then + err "Non-LUKS device decryption failed. verify format: " + err " crypto=hash:cipher:keysize:offset:skip" + exit 1 + fi + if [ -e "/dev/mapper/${cryptname}" ]; then + if [ ${DEPRECATED_CRYPT} -eq 1 ]; then + export root="/dev/mapper/root" fi else - err "Failed to open encryption mapping: The device ${cryptdev} is not a LUKS volume and the crypto= paramater was not specified." + err "Password succeeded, but ${cryptname} creation failed, aborting..." + exit 1 fi + else + err "Failed to open encryption mapping: The device ${cryptdev} is not a LUKS volume and the crypto= paramater was not specified." fi - rm -f ${ckeyfile} fi + rm -f ${ckeyfile} } + +# vim: set ft=sh ts=4 sw=4 et: |