Tomb/tomb

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2011-02-10 11:22:11 +00:00
#!/bin/zsh
#
# Tomb, the Crypto Undertaker
#
# A commandline tool to easily operate encryption of secret data
#
# Homepage on: [tomb.dyne.org](http://tomb.dyne.org)
# {{{ License
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# Copyright (C) 2007-2014 Dyne.org Foundation
#
# Tomb is designed, written and maintained by Denis Roio <jaromil@dyne.org>
#
# With contributions by Anathema, Boyska and Hellekin O. Wolf.
#
# Testing and reviews are contributed by Dreamer, Shining,
# Mancausoft, Asbesto Molesto and Nignux.
#
# Tomb's artwork is contributed by Jordi aka Mon Mort.
#This source code is free software; you can redistribute it
#and/or modify it under the terms of the GNU Public License
#as published by the Free Software Foundation; either
#version 3 of the License, or (at your option) any later
#version.
#
#This source code 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. Please refer to the GNU Public License for more
#details.
#
#You should have received a copy of the GNU Public License
#along with this source code; if not, write to: Free
#Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
#02139, USA.
# }}} - License
# {{{ Global variables
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VERSION=1.6
DATE="Sept/2014"
TOMBEXEC=$0
typeset -a OLDARGS
for arg in ${argv}; do OLDARGS+=($arg); done
DD="dd"
WIPE="rm -f"
MKFS="mkfs.ext3 -q -F -j -L"
KDF=1
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STEGHIDE=1
RESIZER=1
SWISH=1
QRENCODE=1
MOUNTOPTS="rw,noatime,nodev"
# prefix for temporary files
TMPPREFIX="/dev/shm/$$.$RANDOM."
# makes glob matching case insensitive
unsetopt CASE_MATCH
typeset -AH global_opts
typeset -AH opts
typeset -H username
typeset -H _uid
typeset -H _gid
typeset -H _tty
typeset -H tomb_file
typeset -H tomb_key
typeset -H tomb_key_file
typeset -H tomb_secret
typeset -H tomb_password
typeset -aH tomb_tempfiles
typeset -aH tomb_loopdevs
# Make sure sbin is in PATH
PATH+=:/sbin:/usr/sbin
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# For gettext
export TEXTDOMAIN=tomb
# }}}
# {{{ Safety functions
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endgame() {
# here clear all temp files and flush all pipes
# prepare some random material to overwrite vars
rr="$RANDOM"
while [[ ${#rr} -lt 500 ]]; do
rr+="$RANDOM"; done
# we make sure no info is left in unallocated mem
tomb_file="$rr"; unset tomb_file
tomb_key="$rr"; unset tomb_key
tomb_key_file="$rr"; unset tomb_key_file
tomb_secret="$rr"; unset tomb_secret
tomb_password="$rr"; unset tomb_password
for f in $tomb_tempfiles; do
${=WIPE} "$f"; done
unset tomb_tempfiles
for l in $tomb_loopdevs; do
losetup -d "$l"; done
unset tomb_loopdevs
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}
# trap functions for the endgame event
TRAPINT() { endgame INT }
TRAPEXIT() { endgame EXIT }
TRAPHUP() { endgame HUP }
TRAPQUIT() { endgame QUIT }
TRAPABRT() { endgame ABORT }
TRAPKILL() { endgame KILL }
TRAPPIPE() { endgame PIPE }
TRAPTERM() { endgame TERM }
TRAPSTOP() { endgame STOP }
check_shm() {
# TODO: configure which tmp dir to use from a cli flag
SHMPREFIX=/dev/shm
[[ -k /dev/shm ]] || [[ -k /run/shm ]] && { SHMPREFIX=/run/shm } \
|| {
# mount the tmpfs if the SO doesn't already
mkdir /run/shm
[[ $? = 0 ]] || {
fatal "Fatal error creating a directory for temporary files"
return 1 }
mount -t tmpfs tmpfs /run/shm \
-o nosuid,noexec,nodev,mode=0600,uid="$_uid",gid="$_gid"
[[ $? = 0 ]] || {
fatal "Fatal error mounting tmpfs in /run/shm for temporary files"
return 1 }
SHMPREFIX=/run/shm
}
# setup a special env var for zsh to create temp files that will
# then be deleted at the exit of each function using them.
TMPPREFIX="$SHMPREFIX/$$.$RANDOM."
return 0
}
# Provide a random filename in shared memory
tmp_create() {
local tfile="${TMPPREFIX}${RANDOM}"
touch "$tfile"
[[ $? = 0 ]] || {
fatal "Fatal error creating a temporary file: $tfile"
return 1 }
chown "$_uid":"$_gid" "$tfile"
chmod 0600 "$tfile"
[[ $? = 0 ]] || {
fatal "Fatal error setting permissions on temporary file: $tfile"
return 1 }
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_verbose "created tempfile: ::1 temp file::" $tfile
tomb_tempfiles+=($tfile)
return 0
}
tmp_new() {
# print out the latest tempfile
print - "${tomb_tempfiles[${#tomb_tempfiles}]}"
}
# Check if swap is activated
check_swap() {
# Return 0 if NO swap is used, 1 if swap is used
# Return 2 if swap(s) is(are) used, but ALL encrypted
local swaps="$(awk '/^\// { print $1 }' /proc/swaps 2>-)"
[[ -z "$swaps" ]] && return 0 # No swap partition is active
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# Check whether all swaps are encrypted, and return 2
# If any of the swaps is not encrypted, we bail out and return 1.
ret=1
for s in $=swaps; do
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bone=`sudo file $s`
if `echo "$bone" | grep 'swap file' &>-`; then
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# It's a regular (unencrypted) swap file
ret=1
break
elif `echo "$bone" | grep 'symbolic link' &>-`; then
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# Might link to a block
ret=1
if [ "/dev/mapper" = "${s%/*}" ]; then
is_crypt=`sudo dmsetup status "$s" | awk '/crypt/ {print $3}'`
if [ "crypt" = "$is_crypt" ]; then
ret=2
fi
else
break
fi
elif `echo "$bone" | grep 'block special' &>-`; then
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# Is a block
ret=1
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is_crypt=`sudo dmsetup status "$s" | awk '/crypt/ {print $3}'`
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if [ "crypt" = "$is_crypt" ]; then
ret=2
else
break
fi
fi
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done
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_warning "An active swap partition is detected, this poses security risks."
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if [[ $ret -eq 2 ]]; then
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_success "All your swaps are belong to crypt. Good."
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else
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_warning "You can deactivate all swap partitions using the command:"
_warning " swapoff -a"
_warning "But if you want to proceed like this, use the -f (force) flag."
_failure "Operation aborted."
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fi
return $ret
}
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# Wrapper to allow encrypted swap and remind the user about
# possible data leaks to disk if swap is on, and not to be ignored
_check_swap() {
if ! option_is_set -f && ! option_is_set --ignore-swap; then
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check_swap
case $? in
0|2) # No, or encrypted swap
return 0
;;
*) # Unencrypted swap
return 1
;;
esac
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fi
}
# Ask user for a password
ask_password() {
# we use pinentry now
# comes from gpg project and is much more secure
# it also conveniently uses the right toolkit
# pinentry has no custom icon setting
# so we need to temporary modify the gtk theme
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if [ -r /usr/local/share/themes/tomb/gtk-2.0-key/gtkrc ]; then
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GTK2_RC=/usr/local/share/themes/tomb/gtk-2.0-key/gtkrc
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elif [ -r /usr/share/themes/tomb/gtk-2.0-key/gtkrc ]; then
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GTK2_RC=/usr/share/themes/tomb/gtk-2.0-key/gtkrc
fi
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title="Insert tomb password."
if [ $2 ]; then title="$2"; fi
output=`cat <<EOF | GTK2_RC_FILES=${GTK2_RC} pinentry 2>- | tail -n +7
OPTION ttyname=$TTY
OPTION lc-ctype=$LANG
SETTITLE $title
SETDESC $1
SETPROMPT Password:
GETPIN
EOF`
if [[ `tail -n1 <<<$output` =~ ERR ]]; then
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return 1
fi
head -n1 <<<$output | awk '/^D / { sub(/^D /, ""); print }'
return 0
}
# Drop privileges
exec_as_user() {
if ! [ $SUDO_USER ]; then
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exec $@[@]
return $?
fi
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_verbose "exec_as_user '::1 user::': ::2::" $SUDO_USER ${(f)@}
sudo -u $SUDO_USER "${@[@]}"
return $?
}
#Escalate privileges
check_priv() {
# save original user
username=$USER
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if [ $UID != 0 ]; then
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_verbose "Using sudo for root execution of '::1 exec:: ::2 args::'." $TOMBEXEC ${(f)OLDARGS}
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# check if sudo has a timestamp active
sudok=false
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if ! option_is_set --sudo-pwd; then
if [ $? != 0 ]; then # if not then ask a password
cat <<EOF | pinentry 2>- | awk '/^D / { sub(/^D /, ""); print }' | sudo -S -v
OPTION ttyname=$TTY
OPTION lc-ctype=$LANG
SETTITLE Super user privileges required
SETDESC Sudo execution of Tomb ${OLDARGS[@]}
SETPROMPT Insert your USER password:
GETPIN
EOF
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fi
else
_verbose "Escalating privileges using sudo-pwd."
sudo -S -v <<<`option_value --sudo-pwd`
fi
sudo "${TOMBEXEC}" -U ${UID} -G ${GID} -T ${TTY} "${(@)OLDARGS}"
exit $?
fi # are we root already
# make sure necessary kernel modules are loaded
modprobe dm_mod
modprobe dm_crypt
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return 0
}
# check if a filename is a valid tomb
is_valid_tomb() {
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_verbose "is_valid_tomb ::1 tomb file::" $1
# argument check
{ test "$1" = "" } && {
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_warning "Tomb file is missing from arguments."; return 1 }
# file checks
{ test -r "$1" } || {
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_warning "Tomb file not found: ::1 tomb file::" $1; return 1 }
{ test -f "$1" } || {
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_warning "Tomb file is not a regular file: ::1 tomb file::" $1; return 1 }
{ test -s "$1" } || {
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_warning "Tomb file is empty (zero length): ::1 tomb file::" $1; return 1 }
{ test -w "$1" } || {
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_warning "Tomb file is not writable: ::1 tomb file::" $1; return 1 }
# check file type (if its a Luks fs)
file "$1" | grep -i "luks encrypted file" > /dev/null || {
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_warning "File is not yet a tomb: ::1 tomb file::" $1}
# check if its already open
tombfile=`basename $1`
tombname=${tombfile%%\.*}
mount -l | grep "${tombfile}.*\[$tombname\]$" > /dev/null
{ test $? = 0 } && {
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_warning "Tomb is currently in use: ::1 tomb name::" $tombname; return 1 }
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_message "Valid tomb file found: ::1 tomb file::" $1
return 0
}
# $1 is the tomb file to be lomounted
lo_mount() {
tpath="$1"
is_valid_tomb "$tpath" || {
_failure "Loopback mount called on invalid tomb: ::1 path::" $tpath }
# check if we have support for loop mounting
losetup -f >& -
[[ $? = 0 ]] || {
_warning "Loop mount of volumes is not possible on this machine, this error"
_warning "often occurs on VPS and kernels that don't provide the loop module."
_warning "It is impossible to use Tomb on this machine at this conditions."
_failure "Operation aborted."
}
_nstloop=`losetup -f` # get the number for next loopback device
losetup -f "$tpath" >& - # allocates the next loopback for our file
tomb_loopdevs+=("$_nstloop") # add to array of lodevs used
return 0
}
# print out latest loopback mounted
lo_new() { print - "${tomb_loopdevs[${#tomb_loopdevs}]}" }
# $1 is the path to the lodev to be preserved after quit
lo_preserve() {
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_verbose "lo_preserve on ::1 path::" $1
# remove the lodev from the tomb_lodevs array
tomb_loopdevs=("${(@)tomb_loopdevs:#$1}")
}
# eventually used for debugging
dump_secrets() {
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_verbose "tomb_file: ::1 tomb file::" $tomb_file
_verbose "tomb_key: ::1 key:: chars long" ${#tomb_key}
_verbose "tomb_key_file: ::1 key::" $tomb_key_file
_verbose "tomb_secret: ::1 secret:: chars long" ${#tomb_secret}
_verbose "tomb_password: ::1 tomb pass::" $tomb_password
_verbose "tomb_tempfiles: ::1 temp files::" ${(@)tomb_tempfiles}
_verbose "tomb_loopdevs: ::1 loopdevs::" ${(@)tomb_loopdevs}
}
# }}}
# {{{ Commandline interaction
usage() {
cat <<EOF
Syntax: tomb [options] command [arguments]
Commands:
// Creation:
dig create a new empty TOMB file of size -s in MB
forge create a new KEY file and set its password
lock installs a lock on a TOMB to use it with KEY
// Operations on tombs:
open open an existing TOMB
index update the search indexes of tombs
search looks for filenames matching text patterns
list list of open TOMBs and information on them
close close a specific TOMB (or 'all')
slam slam a TOMB killing all programs using it
EOF
if [ "$RESIZER" = 1 ]; then
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cat <<EOF
resize resize a TOMB to a new size -s (can only grow)
EOF
fi
cat <<EOF
// Operations on keys:
passwd change the password of a KEY
setkey change the KEY locking a TOMB (needs old one)
EOF
{ test "$QRENCODE" = "1" } && {
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cat <<EOF
engrave makes a QR code of a KEY to be saved on paper
EOF
}
if [ "$STEGHIDE" = 1 ]; then
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cat <<EOF
bury hide a KEY inside a JPEG image
exhume extract a KEY from a JPEG image
EOF
fi
cat <<EOF
Options:
-s size of the tomb file when creating/resizing one (in MB)
-k path to the key to be used ('-k -' to read from stdin)
-n don't process the hooks found in tomb
-o mount options used to open (default: rw,noatime,nodev)
-f force operation (i.e. even if swap is active)
EOF
{ test "$KDF" = 1 } && {
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cat <<EOF
--kdf generate passwords armored against dictionary attacks
EOF
}
cat <<EOF
-h print this help
-v print version, license and list of available ciphers
-q run quietly without printing informations
-D print debugging information at runtime
For more informations on Tomb read the manual: man tomb
Please report bugs on <http://github.com/dyne/tomb/issues>.
EOF
}
# Check an option
option_is_set() {
# First argument, the commandline flag (i.e. "-s").
# Second (optional) argument: if "out", command will print it out 'set'/'unset'
# (useful for if conditions).
# Return 0 if is set, 1 otherwise
[[ -n ${(k)opts[$1]} ]];
r=$?
if [[ $2 == out ]]; then
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if [[ $r == 0 ]]; then
echo 'set'
else
echo 'unset'
fi
fi
return $r;
}
# Get an option value
option_value() {
# First argument, the commandline flag (i.e. "-s").
print -n - "${opts[$1]}"
}
# Messaging function with pretty coloring
function _msg() {
local tmp_msg="$(gettext -s - "$2")"
local msg="${(S)${(S)${(S)tmp_msg//::3*::/$5}//::2*::/$4}//::1*::/$3}"
local command="print -P"
local progname="$fg[magenta]${TOMBEXEC##*/}$reset_color"
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local message="$fg_bold[normal]$fg_no_bold[normal]$msg$reset_color"
local -i returncode
case "$1" in
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inline)
command+=" -n"; pchars=" > "; pcolor="yellow"
;;
message)
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pchars=" . "; pcolor="white"; message="$fg_no_bold[$pcolor]$msg$reset_color"
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;;
verbose)
pchars="[D]"; pcolor="blue"
;;
success)
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pchars="(*)"; pcolor="green"; message="$fg_no_bold[$pcolor]$msg$reset_color"
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;;
warning)
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pchars="[W]"; pcolor="yellow"; message="$fg_no_bold[$pcolor]$msg$reset_color"
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;;
failure)
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pchars="[E]"; pcolor="red"; message="$fg_no_bold[$pcolor]$msg$reset_color"
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returncode=1
;;
*)
pchars="[F]"; pcolor="red"
message="Developer oops! Usage: _msg MESSAGE_TYPE \"MESSAGE_CONTENT\""
returncode=127
;;
esac
${=command} "${progname} $fg_bold[$pcolor]$pchars$reset_color ${message}$color[reset_color]" >&2
return $returncode
}
function _message say() {
local notice="message"
[[ "$1" = "-n" ]] && shift && notice="inline"
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option_is_set -q || _msg "$notice" "$1" "$2" "$3" "$4"
return 0
}
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function _verbose xxx() {
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option_is_set -D && _msg verbose "$1" "$2" "$3" "$4"
return 0
}
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function _success yes() {
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option_is_set -q || _msg success "$1" "$2" "$3" "$4"
return 0
}
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function _warning no() {
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option_is_set -q || _msg warning "$1" "$2" "$3" "$4"
return 1
}
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function _failure die() {
typeset -i exitcode=${exitv:-1}
option_is_set -q || _msg failure "$1" "$2" "$3" "$4"
# be sure we forget the secrets we were told
exit $exitcode
}
# Print out progress to inform GUI caller applications (--batch mode)
progress() {
# $1 is "what is progressing"
# $2 is "percentage"
# $3 is (eventually blank) status
# Example: if creating a tomb, it could be sth like
# progress create 0 filling with random data
# progress create 40 generating key
# progress keygen 0 please move the mouse
# progress keygen 30 please move the mouse
# progress keygen 60 please move the mouse
# progress keygen 100 key generated
# progress create 80 please enter password
# progress create 90 formatting the tomb
# progress create 100 tomb created successfully
if ! option_is_set --batch; then
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return
fi
print "[m][P][$1][$2][$3]" >&2
}
# Check what's installed
check_bin() {
# check for required programs
for req in cryptsetup pinentry sudo gpg; do
command -v $req >& - || exitv=1 _failure "Cannot find ::1::. It's a requirement to use Tomb, please install it." $req
done
export PATH=/sbin:/usr/sbin:$PATH
# which dd command to use
command -v dcfldd >& -
{ test $? = 0 } && { DD="dcfldd statusinterval=1" }
# which wipe command to use
command -v wipe >& - && WIPE="wipe -f -s" || WIPE="rm -f"
# check for filesystem creation progs
command -v mkfs.ext4 >& - && \
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MKFS="mkfs.ext4 -q -F -j -L" || \
MKFS="mkfs.ext3 -q -F -j -L"
# check for steghide
command -v steghide >& - || STEGHIDE=0
# check for resize
command -v e2fsck resize2fs >& - || RESIZER=0
# check for KDF auxiliary tools
command -v tomb-kdb-pbkdf2 >& - || KDF=0
# check for Swish-E file content indexer
command -v swish-e >& - || SWISH=0
# check for QREncode for paper backups of keys
command -v qrencode >& - || QRENCODE=0
}
# }}} - Commandline interaction
# {{{ Key operations
# $1 is the encrypted key contents we are checking
is_valid_key() {
_verbose "is_valid_key"
_key="$1"
# argument check
{ test "$_key" = "" } && { _key="$tomb_key" }
{ test "$_key" = "" } && {
_warning "is_valid_key() called without argument."; return 1 }
# if the key file is an image don't check file header
{ test -r "$tomb_key_file" } \
&& [[ `file "$tomb_key_file"` =~ "JP.G" ]] \
&& {
_message "Key is an image, it might be valid."; return 0 }
[[ "$_key" =~ "BEGIN PGP" ]] && {
_message "Key is valid."; return 0 }
return 1
}
# $1 is a string containing an encrypted key
recover_key() {
_warning "Attempting key recovery."
_key="$tomb_key"
tomb_key=""
[[ "$_key" =~ "_KDF_" ]] && {
tomb_key+="`print - $_key | $head -n 1`\n" }
tomb_key+="-----BEGIN PGP MESSAGE-----\n"
tomb_key+="$_key\n"
tomb_key+="-----END PGP MESSAGE-----\n"
return 0
}
# This function retrieves a tomb key specified on commandline or from
# stdin if -k - was selected. It also runs validity checks on the
# file. On success returns 0 and prints out the full path to
# the key, setting globals: $tomb_key_file and $tomb_key
load_key() {
# take the name of a tomb file as argument to option -k
# if no argument is given, tomb{key|dir|file} are set by caller
local keyopt
[[ "$1" = "" ]] || { keyopt="$1" }
[[ "$keyopt" = "" ]] && { keyopt="`option_value -k`" }
[[ "$keyopt" = "" ]] && {
_failure "This operation requires a key file to be specified using the -k option." }
if [[ "$keyopt" == "-" ]]; then
_verbose "load_key reading from stdin."
# take key from stdin
_message "Waiting for the key to be piped from stdin... "
tomb_key_file=stdin
tomb_key=`cat`
else
_verbose "load_key argument: $keyopt"
# take key from a file
tomb_key_file="$keyopt"
{ test -r "${tomb_key_file}" } || {
_warning "Key not found, specify one using -k."
return 1}
tomb_key=`cat $tomb_key_file`
fi
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_verbose "load_key: ::1 key::" $tomb_key_file
is_valid_key "${tomb_key}" || {
_warning "The key seems invalid or its format is not known by this version of Tomb."
# try recovering the key
recover_key "$tomb_key"
}
# declared tomb_key (contents)
# declared tomb_key_file (path)
return 0
}
# takes two args just like get_lukskey
# prints out the decrypted content
# contains tweaks for different gpg versions
gpg_decrypt() {
# fix for gpg 1.4.11 where the --status-* options don't work ;^/
gpgver=`gpg --version --no-permission-warning | awk '/^gpg/ {print $3}'`
gpgpass="$1\n$tomb_key"
if [ "$gpgver" = "1.4.11" ]; then
_verbose "GnuPG is version 1.4.11 - adopting status fix."
tomb_secret=`print - "$gpgpass" | \
gpg --batch --passphrase-fd 0 --no-tty --no-options"`
ret=$?
unset gpgpass
else # using status-file in gpg != 1.4.11
# TODO: use mkfifo
tmp_create
_status=`tmp_new`
tomb_secret=`print - "$gpgpass" | \
gpg --batch --passphrase-fd 0 --no-tty --no-options \
--status-fd 2 --no-mdc-warning --no-permission-warning \
--no-secmem-warning 2> $_status`
unset gpgpass
grep 'DECRYPTION_OKAY' $_status > /dev/null
ret=$?
fi
return $ret
}
# Gets a key file and a password, prints out the decoded contents to
# be used directly by Luks as a cryptographic key
get_lukskey() {
# $1 is the password
_verbose "get_lukskey"
_password="$1"
exhumedkey=""
firstline=`head -n1 <<< "$tomb_key"`
# key is KDF encoded
if [[ $firstline =~ '^_KDF_' ]]; then
_verbose "KDF: `cut -d_ -f 3 <<<$firstline`"
case `cut -d_ -f 3 <<<$firstline` in
pbkdf2sha1)
pbkdf2_param=`cut -d_ -f 4- <<<$firstline | tr '_' ' '`
_password=$(tomb-kdb-pbkdf2 ${=pbkdf2_param} 2>- <<<$_password)
;;
*)
_failure "No suitable program for KDF ::1 program::." $(cut -f 3 <<<$firstline)
unset _password
return 1
;;
esac
# key needs to be exhumed from an image
elif [ -r "$tomb_key_file" ] \
&& [[ `file "$tomb_key_file"` =~ "JP.G" ]]; then
exhume_key "$tomb_key_file" "$_password"
fi
gpg_decrypt "$_password" # saves decrypted content into $tomb_secret
ret="$?"
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_verbose "get_lukskey returns ::1::" $ret
return $ret
}
# This function asks the user for the password to use the key it tests
# it against the return code of gpg on success returns 0 and saves
# the password in the global variable $tomb_password
ask_key_password() {
[[ "$tomb_key_file" = "" ]] && {
_failure "Internal error: ask_key_password() called before load_key()." }
keyname="$tomb_key_file"
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_message "A password is required to use key ::1 key::" $keyname
passok=0
tombpass=""
if [[ "$1" = "" ]]; then
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for c in 1 2 3; do
if [[ $c = 1 ]]; then
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tombpass=`exec_as_user ${TOMBEXEC} askpass "Insert password to use key: $keyname"`
else
tombpass=`exec_as_user ${TOMBEXEC} askpass "Insert password to use key: $keyname (retry $c)"`
fi
if [[ $? != 0 ]]; then
_warning "User aborted password dialog."
return 1
fi
get_lukskey "$tombpass"
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if [ $? = 0 ]; then
passok=1; _message "Password OK."
break;
fi
done
else
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# if a second argument is present then the password is already known
tombpass="$1"
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_verbose "ask_key_password with tombpass: ::1 tomb pass::" $tombpass
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get_lukskey "$tombpass"
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if [ $? = 0 ]; then
passok=1; _message "Password OK."; fi
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fi
# print the password out in case caller needs to know it
{ test "$passok" = "1" } || { return 1 }
tomb_password="$tombpass"
return 0
}
# change tomb key password
change_passwd() {
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_message "Commanded to change password for tomb key ::1 key::" $1
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_check_swap
load_key
keyfile="$tomb_key_file"
local tmpnewkey lukskey c tombpass tombpasstmp
tmp_create
tmpnewkey=`tmp_new`
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_success "Changing password for ::1 key file::" $keyfile
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if option_is_set --tomb-old-pwd; then
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tomb_old_pwd="`option_value --tomb-old-pwd`"
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_verbose "tomb-old-pwd = ::1 old pass::" $tomb_old_pwd
ask_key_password "$tomb_old_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_failure "No valid password supplied." }
# here $tomb_secret contains the key material in clear
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if option_is_set --tomb-pwd; then
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tomb_new_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 new pass::" $tomb_new_pwd
gen_key "$tomb_new_pwd" >> "$tmpnewkey"
else
gen_key >> "$tmpnewkey"
fi
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if ! is_valid_key "`cat $tmpnewkey`"; then
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_failure "Error: the newly generated keyfile does not seem valid."
else
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# copy the new key as the original keyfile name
cp -f "${tmpnewkey}" "${keyfile}"
_success "Your passphrase was successfully updated."
fi
return 0
}
# takes care to encrypt a key
# honored options: --kdf --tomb-pwd -o
gen_key() {
# $1 the password to use, if not set then ask user
# -o is the --cipher-algo to use (string taken by GnuPG)
local algopt="`option_value -o`"
local algo="${algopt:-AES256}"
# here user is prompted for key password
tombpass=""
tombpasstmp=""
if [ "$1" = "" ]; then
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while true; do
# 3 tries to write two times a matching password
tombpass=`exec_as_user ${TOMBEXEC} askpass "Type the new password to secure your key"`
if [[ $? != 0 ]]; then
_failure "User aborted."
fi
if [ -z $tombpass ]; then
_warning "You set empty password, which is not possible."
continue
fi
tombpasstmp=$tombpass
tombpass=`exec_as_user ${TOMBEXEC} askpass "Type the new password to secure your key (again)"`
if [[ $? != 0 ]]; then
_failure "User aborted."
fi
if [ "$tombpasstmp" = "$tombpass" ]; then
break;
fi
unset tombpasstmp
unset tombpass
done
else
tombpass="$1"
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_verbose "gen_key takes tombpass from CLI argument: ::1 tomb pass::" $tombpass
fi
header=""
{ test "$KDF" = 1 } && {
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{ option_is_set --kdf } && {
# KDF is a new key strenghtening technique against brute forcing
# see: https://github.com/dyne/Tomb/issues/82
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itertime="`option_value --kdf`"
# removing support of floating points because they can't be type checked well
if [[ "$itertime" != <-> ]]; then
unset tombpass
unset tombpasstmp
_failure "Wrong argument for --kdf: must be an integer number (iteration seconds)."
fi
# --kdf takes one parameter: iter time (on present machine) in seconds
local -i microseconds
microseconds=$(( itertime * 10000 ))
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_success "Using KDF, iterations: ::1 microseconds::" $microseconds
_message "generating salt"
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pbkdf2_salt=`tomb-kdb-pbkdf2-gensalt`
_message "calculating iterations"
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pbkdf2_iter=`tomb-kdb-pbkdf2-getiter $microseconds`
_message "encoding the password"
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# We use a length of 64bytes = 512bits (more than needed!?)
tombpass=`tomb-kdb-pbkdf2 $pbkdf2_salt $pbkdf2_iter 64 <<<"${tombpass}"`
header="_KDF_pbkdf2sha1_${pbkdf2_salt}_${pbkdf2_iter}_64\n"
}
}
print $header
# TODO: check result of gpg operation
cat <<EOF | gpg --openpgp --force-mdc --cipher-algo ${algo} \
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--batch --no-options --no-tty --passphrase-fd 0 --status-fd 2 \
-o - -c -a
${tombpass}
${tomb_secret}
EOF
# print -n "${tombpass}" \
# | gpg --openpgp --force-mdc --cipher-algo ${algo} \
# --batch --no-options --no-tty --passphrase-fd 0 --status-fd 2 \
# -o - -c -a ${lukskey}
# update global var
tomb_password="$tombpass"
unset tombpass
unset tombpasstmp
}
# prints an array of ciphers available in gnupg (to encrypt keys)
list_gnupg_ciphers() {
# prints an error if GnuPG is not found
which gpg >& - || _failure "gpg (GnuPG) is not found, Tomb cannot function without it."
ciphers=(`gpg --version | awk '
BEGIN { ciphers=0 }
/^Cipher:/ { gsub(/,/,""); sub(/^Cipher:/,""); print; ciphers=1; next }
/^Hash:/ { ciphers=0 }
{ if(ciphers==0) { next } else { gsub(/,/,""); print; } }
'`)
echo " ${ciphers}"
return 1
}
# Steganographic function to bury a key inside an image.
# Requires steghide(1) to be installed
bury_key() {
load_key
[[ $? = 0 ]] || {
_failure "Bury failed for invalid key: ::1 key::" $tomb_key_file }
imagefile=$1
file $imagefile | grep -i JPEG > /dev/null
if [ $? != 0 ]; then
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_warning "Encode failed: ::1 image file:: is not a jpeg image." $imagefile
return 1
fi
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_success "Encoding key ::1 tomb key:: inside image ::2 image file::" $tombkey $imagefile
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_message "Please confirm the key password for the encoding"
# We ask the password and test if it is the same encoding the
# base key, to insure that the same password is used for the
# encryption and the steganography. This is a standard enforced
# by Tomb, but its not strictly necessary (and having different
# password would enhance security). Nevertheless here we prefer
# usability.
if option_is_set --tomb-pwd; then
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tomb_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 tomb pass::" $tomb_pwd
ask_key_password "$tomb_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_warning "Wrong password supplied."
_failure "You shall not bury a key whose password is unknown to you."
}
# we omit armor strings since having them as constants can give
# ground to effective attacks on steganography
print - "$tomb_key" | awk '
/^-----/ {next}
/^Version/ {next}
{print $0}' \
| steghide embed --embedfile - --coverfile ${imagefile} \
-p ${tomb_password} -z 9 -e serpent cbc
if [ $? != 0 ]; then
_warning "Encoding error: steghide reports problems."
res=1
else
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_success "Tomb key encoded succesfully into image ::1 image file::" $imagefile
res=0
fi
return $res
}
# mandatory 1st arg: the image file where key is supposed to be
# optional 2nd arg: the password to use (same as key, internal use)
# optional 3rd arg: the key where to save the result (- for stdout)
exhume_key() {
imagefile="$1"
res=1
knownpass="$2"
destkey="$3"
[[ "$destkey" = "" ]] && {
destkey="`option_value -k`"
{ test "$destkey" = "" } && {
# no key output specified: fallback to stdout
destkey="-"
_message "printing exhumed key on stdout" }
}
{ test -r "$imagefile" } || {
_failure "Exhume failed, image file not found: ::1 image file::" $imagefile }
[[ `file "$imagefile"` =~ "JP.G" ]] || {
_failure "Exhume failed: ::1 image file:: is not a jpeg image." $imagefile }
# when a password is passed as argument then always print out
# the exhumed key on stdout without further checks (internal use)
{ test "$knownpass" = "" } || {
tomb_key=`steghide extract -sf "$imagefile" -p "$knownpass" -xf -`
{ test $? = 0 } || {
_failure "Wrong password or no steganographic key found" }
recover_key "$tomb_key"
return 0
}
{ test "$destkey" = "-" } || {
if [[ -s "$destkey" ]]; then
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_warning "File exists: ::1 tomb key::" $tombkey
{ option_is_set -f } || {
_warning "Make explicit use of --force to overwrite."
_failure "Refusing to overwrite file. Operation aborted." }
_warning "Use of --force selected: overwriting."
rm -f ${destkey}
fi
}
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_message "Trying to exhume a key out of image ::1 image file::" $imagefile
if option_is_set --tomb-pwd; then
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tombpass="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 tomb pass::" $tombpass
elif [[ "$tomb_password" != "" ]]; then
# password is known already
tombpass="$tomb_password"
else
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tombpass=`exec_as_user ${TOMBEXEC} askpass "Insert password to exhume key from $imagefile"`
if [[ $? != 0 ]]; then
_warning "User aborted password dialog."
return 1
fi
fi
# always steghide required
steghide extract -sf ${imagefile} -p ${tombpass} -xf ${destkey}
res=$?
unset tombpass
[[ "$destkey" = "-" ]] && { destkey="stdout" }
if [ $res = 0 ]; then
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_success "Key succesfully exhumed to ::1 key::." $destkey
else
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_warning "Nothing found in ::1 image file::" $imagefile
fi
return $res
}
# Produces a printable image of the key contents so that it can be
# backuped on paper and hidden in books etc.
engrave_key() {
# load key from options
load_key
tombkey="$tomb_key_file"
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{ test $? = 0 } || { _failure "No key specified." }
keyname=`basename $tombkey`
pngname="$keyname.qr.png"
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_success "Rendering a printable QRCode for key: ::1 tomb key::" $tombkey
# we omit armor strings to save space
awk '
/^-----/ {next}
/^Version/ {next}
2013-09-18 00:19:04 +00:00
{print $0}' ${tombkey} | qrencode --size 4 --level H \
--casesensitive -o "$pngname"
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{ test $? = 0 } || { _failure "QREncode reported an error." }
_success "Operation successful:"
ls -lh $pngname
file $pngname
}
# }}} - Key handling
# {{{ Create
2011-12-01 19:04:56 +00:00
# This is a new way to create tombs which dissects the whole create_tomb() into 3 clear steps:
#
2014-04-28 12:56:21 +00:00
# * dig a .tomb (the large file) using /dev/urandom (takes some minutes at least)
#
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# * forge a .key (the small file) using /dev/random (good entropy needed)
#
# * lock the .tomb file with the key, binding the key to the tomb (requires dm_crypt format)
forge_key() {
# can be specified both as simple argument or using -k
destkey="$1"
{ option_is_set -k } && { destkey="`option_value -k`" }
{ test "$destkey" = "" } && {
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_warning "A filename needs to be specified using -k to forge a new key."
return 1 }
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_message "Commanded to forge key ::1 key::" $destkey
_check_swap
# make sure that gnupg doesn't quits with an error before first run
2014-04-25 21:00:00 +00:00
{ test -r $HOME/.gnupg/pubring.gpg } || {
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mkdir $HOME/.gnupg
touch $HOME/.gnupg/pubring.gpg }
{ test -r "$destkey" } && {
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_warning "Forging this key would overwrite an existing file. Operation aborted."
_failure "`ls -lh $destkey`" }
{ option_is_set -o } && { algopt="`option_value -o`" }
algo=${algopt:-AES256}
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_message "Commanded to forge key ::1 key:: with cipher algorithm ::2 algorithm::" $destkey $algo
tomb_key_file="$destkey"
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_message "This operation takes time, keep using this computer on other tasks,"
_message "once done you will be asked to choose a password for your tomb."
_message "To make it faster you can move the mouse around."
_message "If you are on a server, you can use an Entropy Generation Daemon."
local random_source=/dev/random
if option_is_set --use-urandom; then
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random_source=/dev/urandom
fi
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_verbose "Data dump using ::1:: from ::2 source::" ${DD[1]} $random_source
tomb_secret=`${=DD} bs=1 count=256 if=$random_source`
{ test $? = 0 } || {
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_warning "Cannot generate encryption key."
_failure "Operation aborted." }
# here the global var tomb_secret contains the nude secret
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_success "Choose the password of your key: ::1 tomb key::" $tomb_key_file
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_message "(You can also change it later using 'tomb passwd'.)"
touch ${tomb_key_file}
chown ${_uid}:${_gid} ${tomb_key_file}
chmod 0600 ${tomb_key_file}
tombname="$tomb_key_file"
# the gen_key() function takes care of the new key's encryption
if option_is_set --tomb-pwd; then
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tomb_new_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 new pass::" $tomb_new_pwd
gen_key "$tomb_new_pwd" >> "$tomb_key_file"
else
gen_key >> "$tomb_key_file"
fi
# load the key contents
tomb_key=`cat "$tomb_key_file"`
# this does a check on the file header
is_valid_key "${tomb_key}" || {
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_warning "The key does not seem to be valid."
_warning "Dumping contents to screen:"
cat ${tombkey}
_warning "--"
umount ${keytmp}
rm -r $keytmp
_failure "Operation aborted."
}
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_message "Done forging ::1 key::" $tomb_key_file
_success "Your key is ready:"
ls -lh ${tomb_key_file}
}
# Dig a tomb, means that it will create an empty file to be formatted
# as a loopback filesystem. Initially the file is filled with random data
# taken from /dev/urandom which improves the tomb's overall security
dig_tomb() {
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_message "Commanded to dig tomb ::1 tomb name::" $1
if [ "$1" = "" ]; then
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_warning "No tomb name specified for creation."
return 1
fi
_check_swap
tombfile=`basename $1`
tombdir=`dirname $1`
# make sure the file has a .tomb extension
tombname=${tombfile%%\.*}
tombfile=${tombname}.tomb
# require the specification of the size of the tomb (-s) in MB
tombsize="`option_value -s`"
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[ $tombsize ] || _failure "Size argument missing, use -s"
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[[ $tombsize != <-> ]] && _failure "Size argument is not an integer."
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[[ $tombsize -lt 10 ]] && _failure "Tombs can't be smaller than 10 megabytes."
if [ -e ${tombdir}/${tombfile} ]; then
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_warning "A tomb exists already. I'm not digging here:"
_warning " `ls -lh ${tombdir}/${tombfile}`"
return 1
fi
2013-05-25 13:05:21 +00:00
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_success "Creating a new tomb in ::1 tomb dir::/::2 tomb file::" $tombdir $tombfile
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_message "Generating ::1 tomb file:: of ::2 size::MiB" $tombfile $tombsize
# we will first touch the file and set permissions: this way, even if interrupted, permissions are right
touch ${tombdir}/${tombfile}
chmod 0600 "${tombdir}/${tombfile}"
chown $_uid:$_gid "${tombdir}/${tombfile}"
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_verbose "Data dump using ::1:: from /dev/urandom" ${DD[1]}
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${=DD} if=/dev/urandom bs=1048576 count=${tombsize} of=${tombdir}/${tombfile}
if [ $? = 0 -a -e ${tombdir}/${tombfile} ]; then
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_message " `ls -lh ${tombdir}/${tombfile}`"
else
_failure "Error creating the tomb ::1 tomb dir::/::2 tomb file::, operation aborted." $tombdir $tombfile
fi
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_success "Done digging ::1 tomb name::" $tombname
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_message "Your tomb is not yet ready, you need to forge a key and lock it:"
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_message "tomb forge ::1 tomb name::.tomb.key" $tombname
_message "tomb lock ::1 tomb name::.tomb -k ::1 tomb name::.tomb.key" $tombname
}
2013-03-22 21:22:55 +00:00
# this function locks a tomb with a key file
# in fact LUKS formatting the loopback volume
# it take arguments as the LUKS cipher to be used
lock_tomb_with_key() {
if ! [ $1 ]; then
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_warning "No tomb specified for locking."
_warning "Usage: tomb lock file.tomb file.tomb.key"
return 1
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fi
tombpath="$1"
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_message "Commanded to lock tomb ::1 tomb file::" $tombfile
tombdir=`dirname "$tombpath"`
tombfile=`basename "$tombpath"`
tombname="${tombfile%%\.*}"
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{ test -f ${tombdir}/${tombfile} } || {
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_failure "There is no tomb here. You have to it dig first."
return 1 }
2013-03-22 21:22:55 +00:00
2014-08-29 10:31:23 +00:00
_verbose "Tomb found: ::1 tomb dir::/::2 tomb file::" $tombdir $tombfile
2013-03-22 21:22:55 +00:00
lo_mount "${tombdir}/${tombfile}"
nstloop=`lo_new`
2013-03-22 21:22:55 +00:00
2014-08-29 10:31:23 +00:00
_verbose "Loop mounted on ::1 mount point::" $nstloop
2013-03-22 21:22:55 +00:00
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_message "Checking if the tomb is empty (we never step on somebody else's bones)."
cryptsetup isLuks ${nstloop}
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if [ $? = 0 ]; then
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# is it a LUKS encrypted nest? then bail out and avoid reformatting it
_warning "The tomb was already locked with another key."
_failure "Operation aborted. I cannot lock an already locked tomb. Go dig a new one."
2013-03-22 21:22:55 +00:00
else
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_message "Fine, this tomb seems empty."
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fi
# load key from options or file
load_key
{ test $? = 0 } || {
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_failure "Aborting operations: error loading key." }
# make sure to call drop_key later
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# the encryption cipher for a tomb can be set when locking using -o
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if option_is_set -o; then
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cipher="`option_value -o`"
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else
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cipher="aes-xts-plain64:sha256"
# old default was aes-cbc-essiv:sha256
# for more alternatives refer to cryptsetup(8)
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fi
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_message "Locking using cipher: ::1 cipher::" $cipher
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# get the pass from the user and check it
if option_is_set --tomb-pwd; then
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tomb_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 tomb pass::" $tomb_pwd
ask_key_password "$tomb_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_failure "No valid password supplied." }
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_success "Locking ::1 tomb file:: with ::2 tomb key::" $tombfile $tombkey
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_message "Formatting Luks mapped device."
print -n - "$tomb_secret" | \
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cryptsetup --key-file - --batch-mode \
--cipher ${cipher} --key-size 256 --key-slot 0 \
luksFormat ${nstloop}
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if ! [ $? = 0 ]; then
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_warning "cryptsetup luksFormat returned an error."
_failure "Operation aborted."
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fi
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print -n - "$tomb_secret" | \
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cryptsetup --key-file - \
--cipher ${cipher} luksOpen ${nstloop} tomb.tmp
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if ! [ $? = 0 ]; then
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_warning "cryptsetup luksOpen returned an error."
_failure "Operation aborted."
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fi
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_message "Formatting your Tomb with Ext3/Ext4 filesystem."
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${=MKFS} ${tombname} /dev/mapper/tomb.tmp
if [ $? != 0 ]; then
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_warning "Tomb format returned an error."
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_warning "Your tomb ::1 tomb file:: may be corrupted." $tombfile
fi
# sync
cryptsetup luksClose tomb.tmp
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_message "Done locking ::1 tomb name:: using Luks dm-crypt ::2 cipher::" $tombname $create_cipher
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_success "Your tomb is ready in ::1 tomb dir::/::2 tomb file:: and secured with key ::3 tomb key::" $tombdir $tombfile $tombkey
}
# This function changes the key that locks a tomb
change_tomb_key() {
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_message "Commanded to reset key for tomb ::1 tomb name::" $2
_check_swap
[[ "$2" = "" ]] && {
_warning "Command 'setkey' needs two arguments: the old key file and the tomb."
_warning "I.e: tomb -k new.tomb.key old.tomb.key secret.tomb"
_failure "Execution aborted."
}
lo_mount "$2"
nstloop=`lo_new`
cryptsetup isLuks ${nstloop}
# is it a LUKS encrypted nest? we check one more time
{ test $? = 0 } || {
_failure "Not a valid LUKS encrypted volume: ::1 volume::" $2 }
load_key "$1"
{ test $? = 0 } || {
_failure "Aborting operations: error loading old key from arguments" }
old_key="$tomb_key"
old_key_file="$tomb_key_file"
# we have everything, prepare to mount
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_success "Changing lock on tomb ::1 tomb name::" $tombname
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_message "Old key: ::1 old key::" $oldkey
# render the mapper
mapdate=`date +%s`
# save date of mount in minutes since 1970
mapper="tomb.${tombname}.${mapdate}.`basename $nstloop`"
# load the old key
if option_is_set --tomb-old-pwd; then
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tomb_old_pwd="`option_value --tomb-old-pwd`"
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_verbose "tomb-old-pwd = ::1 old pass::" $tomb_old_pwd
ask_key_password "$tomb_old_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_failure "No valid password supplied for the old key." }
old_secret="$tomb_secret"
# luksOpen the tomb (not really mounting, just on the loopback)
print -n - "$old_secret" | \
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cryptsetup --key-file - luksOpen ${nstloop} ${mapper}
{ test $? = 0 } || {
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_failure "Unexpected error in luksOpen." }
load_key
{ test $? = 0 } || {
_failure "Aborting operations: error loading new key from -k" }
new_key="$tomb_key"
new_key_file="$tomb_key_file"
_message "New key: $new_key_file"
if option_is_set --tomb-pwd; then
tomb_new_pwd="`option_value --tomb-pwd`"
_verbose "tomb-pwd = $tomb_new_pwd"
ask_key_password "$tomb_new_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
_failure "No valid password supplied for the new key." }
new_secret="$tomb_secret"
# danger zone: due to cryptsetup limitations, in setkey we need
# to write the bare unencrypted key on the tmpfs.
tmp_create
new_secret_file=`tmp_new`
print -n - "$new_secret" >> $new_secret_file
print -n - "$old_secret"| \
cryptsetup --key-file - luksChangeKey "$nstloop" "$new_secret_file"
{ test $? = 0 } || {
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_failure "Unexpected error in luksChangeKey." }
unset old_key
unset new_key
cryptsetup luksClose "${mapper}"
{ test $? = 0 } || {
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_failure "Unexpected error in luksClose." }
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_success "Succesfully changed key for tomb: ::1 tomb file::" $2
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_message "The new key is: ::1 new key::" $newkey
return 0
}
# backward compatibility
create_tomb() {
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_verbose "create_tomb(): ${=@} ${=OLDARGS}"
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[[ "$1" = "" ]] && {
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_warning "No tomb name specified for creation."
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return 1 }
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{ test -s "$1" } && {
_warning "Creating this tomb would overwrite an existing file."
ls -lh "$1"
_failure " Operation aborted." }
tombfile=`basename $1`
tombdir=`dirname $1`
# make sure the file has a .tomb extension
tombname=${tombfile%%\.*}
tombfile=${tombname}.tomb
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${TOMBEXEC} dig ${=PARAM}
${TOMBEXEC} forge ${tombdir}/${tombfile}.key
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{ test $? = 0 } || { _failure "Failed to forge key, operation aborted." }
${TOMBEXEC} lock ${tombdir}/${tombfile} -k ${tombdir}/${tombfile}.key
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{ test $? = 0 } || { _failure "Failed to lock tomb with key, operation aborted." }
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_success "Tomb ::1 tomb name:: succesfully created." $tombname
ls -l ${tombfile}*
}
# }}} - Creation
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# {{{ Open
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# $1 = tombfile $2(optional) = mountpoint
mount_tomb() {
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_message "Commanded to open tomb ::1 tomb name::" $1
if [ "$1" = "" ]; then
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_warning "No tomb name specified for opening."
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return 1
fi
_check_swap
# set up variables to be used
# the full path is made with $tombdir/$tombfile
2011-08-20 17:00:10 +00:00
tombfile=`basename ${1}`
tombdir=`dirname ${1}`
# check file type (if its a Luks fs)
file ${tombdir}/${tombfile} | \
grep -i 'luks encrypted file' 2>&1 > /dev/null
if [ $? != 0 ]; then
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_warning "::1 tomb file:: is not a valid tomb file, operation aborted." $1
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return 1
fi
tombname=${tombfile%%\.*}
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_verbose "Tomb found: ::1 tomb dir::/::2 tomb file::" $tombdir $tombfile
# load_key called here
load_key
########
{ test $? = 0 } || {
_failure "Aborting operations: error loading key ::1 key::" $tombkey }
if [ "$2" = "" ]; then
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tombmount=/media/${tombfile}
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_message "Mountpoint not specified, using default: ::1 mount point::" $tombmount
else
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tombmount=$2
fi
# check if its already open
mount -l | grep "${tombfile}.*\[$tombname\]$" 2>&1 > /dev/null
if [ $? = 0 ]; then
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_warning "::1 tomb name:: is already open." $tombname
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_message "Here below its status is reported:"
list_tombs ${tombname}
return 0
fi
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_success "Opening ::1 tomb file:: on ::2 mount point::" $tombfile $tombmount
lo_mount "${tombdir}/${tombfile}"
nstloop=`lo_new`
cryptsetup isLuks ${nstloop}
if [ $? != 0 ]; then
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# is it a LUKS encrypted nest? see cryptsetup(1)
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_warning "::1 tomb file:: is not a valid Luks encrypted storage file." $tombfile
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return 1
fi
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_message "This tomb is a valid LUKS encrypted device."
luksdump="`cryptsetup luksDump ${nstloop}`"
tombdump=(`print $luksdump | awk '
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/^Cipher name/ {print $3}
/^Cipher mode/ {print $3}
/^Hash spec/ {print $3}'`)
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_message "Cipher is \"::1 cipher::\" mode \"::2 mode::\" hash \"::3 hash::\"" $tombdump[1] $tombdump[2] $tombdump[3]
slotwarn=`print $luksdump | awk '
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BEGIN { zero=0 }
/^Key slot 0/ { zero=1 }
/^Key slot.*ENABLED/ { if(zero==1) print "WARN" }'`
{ test "$slotwarn" = "WARN" } && {
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_warning "Multiple key slots are enabled on this tomb. Beware: there can be a backdoor." }
# save date of mount in minutes since 1970
mapdate=`date +%s`
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mapper="tomb.${tombname}.${mapdate}.`basename $nstloop`"
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_verbose "dev mapper device: ::1 mapper::" $mapper
_verbose "Tomb key: ::1 key::" $tombkey
# take the name only, strip extensions
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_verbose "Tomb name: ::1 tomb name:: (to be engraved)" $tombname
if option_is_set --tomb-pwd; then
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tomb_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 tomb pass::" $tomb_pwd
ask_key_password "$tomb_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_failure "No valid password supplied." }
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print -n - "$tomb_secret" | \
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cryptsetup --key-file - luksOpen ${nstloop} ${mapper}
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if ! [ -r /dev/mapper/${mapper} ]; then
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_failure "Failure mounting the encrypted file."
fi
# preserve the loopdev after exit
lo_preserve "$nstloop"
# array: [ cipher, keysize, loopdevice ]
tombstat=(`cryptsetup status ${mapper} | awk '
/cipher:/ {print $2}
/keysize:/ {print $2}
/device:/ {print $2}'`)
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_success "Success unlocking tomb ::1 tomb name::" $tombname
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_verbose "Key size is ::1 size:: for cipher ::2 cipher::" $tombstat[2] $tombstat[1]
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_message "Checking filesystem via ::1::" $tombstat[3]
fsck -p -C0 /dev/mapper/${mapper}
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_verbose "Tomb engraved as ::1 tomb name::" $tombname
tune2fs -L ${tombname} /dev/mapper/${mapper} > /dev/null
# we need root from here on
mkdir -p $tombmount
mount -o $MOUNTOPTS /dev/mapper/${mapper} ${tombmount}
chown ${_uid}:${_gid} ${tombmount}
chmod 0711 ${tombmount}
2014-08-29 09:26:26 +00:00
# TODO: Fix string
_success "Success opening ::1 tomb file:: on $fg_bold[white]::2 mount point::$fg_no_bold[white]" $tombfile $tombmount
# print out when was opened the last time, by whom and where
{ test -r ${tombmount}/.last } && {
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tombtty="`cat ${tombmount}/.tty`"
tombhost="`cat ${tombmount}/.host`"
tombuid="`cat ${tombmount}/.uid`"
tomblast="`cat ${tombmount}/.last`"
tombuser=`awk -F: '/:'"$tombuid"':/ {print $1}' /etc/passwd`
2014-08-29 10:07:33 +00:00
# TODO: Fix strings
_message "Last visit by $fg_bold[white]::1 user::(::2 tomb build::)$fg_no_bold[white] from $fg_bold[white]::3 tty::$fg_no_bold[white] on $fg_bold[white]$tombhost$fg_no_bold[white]" $tombuser $tombuid $tombtty
_message "on date $fg_bold[white]::1 date::$fg_no_bold[white]" $(date --date @$tomblast +%c)
}
# write down the UID and TTY that opened the tomb
rm -f ${tombmount}/.uid
echo ${_uid} > ${tombmount}/.uid
rm -f ${tombmount}/.tty
echo ${_tty} > ${tombmount}/.tty
# also the hostname
rm -f ${tombmount}/.host
echo `hostname` > ${tombmount}/.host
# and the "last time opened" information
# in minutes since 1970, this is printed at next open
rm -f ${tombmount}/.last
echo "`date +%s`" > ${tombmount}/.last
# human readable: date --date=@"`cat .last`" +%c
# process bind-hooks (mount -o bind of directories)
# and post-hooks (execute on open)
if ! option_is_set -n ; then
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exec_safe_bind_hooks ${tombmount}
exec_safe_post_hooks ${tombmount} open
fi
return 0
}
# ## Hooks execution
exec_safe_bind_hooks() {
if [[ -n ${(k)opts[-o]} ]]; then
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MOUNTOPTS=${opts[-o]}
fi
local MOUNTPOINT="${1}"
local ME=${SUDO_USER:-$(whoami)}
local HOME=$(awk -v a="$ME" -F ':' '{if ($1 == a) print $6}' /etc/passwd 2>-)
if [ $? -ne 0 ]; then
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_warning "How pitiful! A tomb, and no HOME."
return 1
fi
if [ -z "$MOUNTPOINT" -o ! -d "$MOUNTPOINT" ]; then
2014-07-13 15:35:28 +00:00
_warning "Cannot exec bind hooks without a mounted tomb."
return 1
fi
if ! [ -r "$MOUNTPOINT/bind-hooks" ]; then
2014-08-29 10:31:23 +00:00
_verbose "bind-hooks not found in ::1 mount point::" $MOUNTPOINT
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return 1
fi
typeset -al mounted
typeset -Al maps
maps=($(<"$MOUNTPOINT/bind-hooks"))
for dir in ${(k)maps}; do
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if [ "${dir[1]}" = "/" -o "${dir[1,2]}" = ".." ]; then
_warning "bind-hooks map format: local/to/tomb local/to/\$HOME"
continue
fi
if [ "${${maps[$dir]}[1]}" = "/" -o "${${maps[$dir]}[1,2]}" = ".." ]; then
_warning "bind-hooks map format: local/to/tomb local/to/\$HOME. Rolling back"
for dir in ${mounted}; do umount $dir; done
return 1
fi
if [ ! -r "$HOME/${maps[$dir]}" ]; then
2014-08-29 09:33:56 +00:00
_warning "bind-hook target not existent, skipping ::1 home::/::2 subdir::" $HOME ${maps[$dir]}
2014-07-13 15:35:28 +00:00
elif [ ! -r "$MOUNTPOINT/$dir" ]; then
2014-08-29 09:33:56 +00:00
_warning "bind-hook source not found in tomb, skipping ::1 mount point::/::2 subdir::" $MOUNTPOINT $dir
2014-07-13 15:35:28 +00:00
else
mount -o bind,$MOUNTOPTS $MOUNTPOINT/$dir $HOME/${maps[$dir]}
mounted+=("$HOME/${maps[$dir]}")
fi
done
}
# Post mount hooks
exec_safe_post_hooks() {
local mnt=$1 # first argument is where the tomb is mounted
local ME=${SUDO_USER:-$(whoami)}
if ! [ -x ${mnt}/post-hooks ]; then return; fi
# if 'post-hooks' is found inside the tomb, check it: if it is an
# executable, launch it as a user this might need a dialog for
# security on what is being run, however we expect you know well
# what is inside your tomb. this feature opens the possibility to
# make encrypted executables.
cat ${mnt}/post-hooks | head -n1 | grep '^#!/'
if [ $? = 0 ]; then
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_success "Post hooks found, executing as user ::1 user name::." $SUDO_USER
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exec_as_user ${mnt}/post-hooks "$2" "$1"
fi
}
# }}} - Tomb open
# {{{ List
# list all tombs mounted in a readable format
# $1 is optional, to specify a tomb
list_tombs() {
# list all open tombs
mounted_tombs=(`list_tomb_mounts $1`)
{ test ${#mounted_tombs} = 0 } && {
_failure "I can't see any ::1 status:: tomb, may they all rest in peace." ${1:-open} }
for t in ${mounted_tombs}; do
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mapper=`basename ${t[(ws:;:)1]}`
tombname=${t[(ws:;:)5]}
tombmount=${t[(ws:;:)2]}
tombfs=${t[(ws:;:)3]}
tombfsopts=${t[(ws:;:)4]}
tombloop=${mapper[(ws:.:)4]}
# calculate tomb size
ts=`df -hP /dev/mapper/$mapper |
awk "/mapper/"' { print $2 ";" $3 ";" $4 ";" $5 }'`
2014-07-13 15:35:28 +00:00
tombtot=${ts[(ws:;:)1]}
tombused=${ts[(ws:;:)2]}
tombavail=${ts[(ws:;:)3]}
tombpercent=${ts[(ws:;:)4]}
tombp=${tombpercent%%%}
tombsince=`date --date=@${mapper[(ws:.:)3]} +%c`
# find out who opens it from where
{ test -r ${tombmount}/.tty } && {
tombtty="`cat ${tombmount}/.tty`"
tombhost="`cat ${tombmount}/.host`"
tombuid="`cat ${tombmount}/.uid`"
tombuser=`awk -F: '/:'"$tombuid"':/ {print $1}' /etc/passwd`
}
if option_is_set --get-mountpoint; then
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echo $tombmount
continue
fi
# breaking up such strings is good for translation
print -n "$fg[green]$tombname"
print -n "$fg[white] open on "
print -n "$fg_bold[white]$tombmount"
print -n "$fg_no_bold[white] using "
print "$fg_bold[white]$tombfs $tombfsopts"
print -n "$fg_no_bold[green]$tombname"
print -n "$fg_no_bold[white] open since "
print "$fg_bold[white]$tombsince$fg_no_bold[white]"
{ test "$tombtty" = "" } || {
print -n "$fg_no_bold[green]$tombname"
print -n "$fg_no_bold[white] open by "
print -n "$fg_bold[white]$tombuser"
print -n "$fg_no_bold[white] from "
print -n "$fg_bold[white]$tombtty"
print -n "$fg_no_bold[white] on "
print "$fg_bold[white]$tombhost"
}
print -n "$fg_no_bold[green]$tombname"
print -n "$fg[white] size "
print -n "$fg_bold[white]$tombtot"
print -n "$fg_no_bold[white] of which "
print -n "$fg_bold[white]$tombused"
print -n "$fg_no_bold[white] used: "
print -n "$fg_bold[white]$tombavail"
print -n "$fg_no_bold[white] free ("
print -n "$fg_bold[white]$tombpercent"
print "$fg_no_bold[white] full)"
if [[ ${tombp} -ge 90 ]]; then
print -n "$fg_no_bold[green]$tombname"
print "$fg_bold[red] Your tomb is almost full!"
fi
# now check hooks
mounted_hooks=(`list_tomb_binds $tombname`)
for h in ${mounted_hooks}; do
print -n "$fg_no_bold[green]$tombname"
print -n "$fg_no_bold[white] hooks "
# print -n "$fg_bold[white]`basename ${h[(ws:;:)1]}`"
# print -n "$fg_no_bold[white] on "
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print "$fg_bold[white]${h[(ws:;:)2]}$fg_no_bold[white]"
done
done
}
2011-12-01 19:04:56 +00:00
# print out an array of mounted tombs (internal use)
# format is semi-colon separated list of attributes
# if 1st arg is supplied, then list only that tomb
#
# String positions in the semicolon separated array:
#
# 1. full mapper path
#
# 2. mountpoint
#
# 3. filesystem type
#
# 4. mount options
#
# 5. tomb name
list_tomb_mounts() {
if [ "$1" = "" ]; then
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# list all open tombs
mount -l \
| awk '
BEGIN { main="" }
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/^\/dev\/mapper\/tomb/ {
if(main==$1) next;
print $1 ";" $3 ";" $5 ";" $6 ";" $7
main=$1
}
'
else
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# list a specific tomb
mount -l \
| awk -vtomb="[$1]" '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
if($7!=tomb) next;
if(main==$1) next;
print $1 ";" $3 ";" $5 ";" $6 ";" $7
main=$1
}
'
fi
}
# list_tomb_binds
# print out an array of mounted bind hooks (internal use)
# format is semi-colon separated list of attributes
# needs an argument: name of tomb whose hooks belong
list_tomb_binds() {
if [ "$1" = "" ]; then
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_failure "Internal error: list_tomb_binds called without argument."; fi
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# list bind hooks on util-linux 2.20 (Debian 7)
mount -l \
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| awk -vtomb="$1" '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
if($7!=tomb) next;
if(main=="") { main=$1; next; }
if(main==$1)
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print $1 ";" $3 ";" $5 ";" $6 ";" $7
}
'
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# list bind hooks on util-linux 2.17 (Debian 6)
tombmount=`mount -l \
| awk -vtomb="$1" '
/^\/dev\/mapper\/tomb/ { if($7!=tomb) next; print $3; exit; }'`
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mount -l | grep "^$tombmount" \
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| awk -vtomb="$1" '
/bind/ { print $1 ";" $3 ";" $5 ";" $6 ";" $7 }'
}
# }}} - Tomb list
# {{{ Index and search
# index files in all tombs for search
# $1 is optional, to specify a tomb
index_tombs() {
{ command -v updatedb >& - } || {
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_failure "Cannot index tombs on this system: updatedb (mlocate) not installed." }
updatedbver=`updatedb --version | grep '^updatedb'`
[[ "$updatedbver" =~ "GNU findutils" ]] && {
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_warning "Cannot use GNU findutils for index/search commands." }
[[ "$updatedbver" =~ "mlocate" ]] || {
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_failure "Index command needs 'mlocate' to be installed." }
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_verbose "$updatedbver"
mounted_tombs=(`list_tomb_mounts $1`)
{ test ${#mounted_tombs} = 0 } && {
if [ $1 ]; then _failure "There seems to be no open tomb engraved as [::1::]" $1
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else _failure "I can't see any open tomb, may they all rest in peace."
fi
}
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_success "Creating and updating search indexes."
# start the LibreOffice document converter if installed
{ command -v unoconv >& - } && {
unoconv -l 2>- &
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_verbose "unoconv listener launched."
sleep 1 }
for t in ${mounted_tombs}; do
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mapper=`basename ${t[(ws:;:)1]}`
tombname=${t[(ws:;:)5]}
tombmount=${t[(ws:;:)2]}
{ test -r ${tombmount}/.noindex } && {
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_message "Skipping ::1 tomb name:: (.noindex found)." $tombname
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continue }
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_message "Indexing ::1 tomb name:: filenames..." $tombname
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updatedb -l 0 -o ${tombmount}/.updatedb -U ${tombmount}
# here we use swish to index file contents
{ test $SWISH = 1 } && {
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_message "Indexing ::1 tomb name:: contents..." $tombname
tmp_create
swishrc=`tmp_new`
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cat <<EOF > $swishrc
# index directives
DefaultContents TXT*
IndexDir $tombmount
IndexFile $tombmount/.swish
# exclude images
FileRules filename regex /\.jp.?g/i
FileRules filename regex /\.png/i
FileRules filename regex /\.gif/i
FileRules filename regex /\.tiff/i
FileRules filename regex /\.svg/i
FileRules filename regex /\.xcf/i
FileRules filename regex /\.eps/i
FileRules filename regex /\.ttf/i
# exclude audio
FileRules filename regex /\.mp3/i
FileRules filename regex /\.ogg/i
FileRules filename regex /\.wav/i
FileRules filename regex /\.mod/i
FileRules filename regex /\.xm/i
# exclude video
FileRules filename regex /\.mp4/i
FileRules filename regex /\.avi/i
FileRules filename regex /\.ogv/i
FileRules filename regex /\.ogm/i
FileRules filename regex /\.mkv/i
FileRules filename regex /\.mov/i
# exclude system
FileRules filename is ok
FileRules filename is lock
FileRules filename is control
FileRules filename is status
FileRules filename is proc
FileRules filename is sys
FileRules filename is supervise
FileRules filename regex /\.asc$/i
FileRules filename regex /\.gpg$/i
# pdf and postscript
FileFilter .pdf pdftotext "'%p' -"
FileFilter .ps ps2txt "'%p' -"
# compressed files
FileFilterMatch lesspipe "%p" /\.tgz$/i
FileFilterMatch lesspipe "%p" /\.zip$/i
FileFilterMatch lesspipe "%p" /\.gz$/i
FileFilterMatch lesspipe "%p" /\.bz2$/i
FileFilterMatch lesspipe "%p" /\.Z$/
# spreadsheets
FileFilterMatch unoconv "-d spreadsheet -f csv --stdout %P" /\.xls.*/i
FileFilterMatch unoconv "-d spreadsheet -f csv --stdout %P" /\.xlt.*/i
FileFilter .ods unoconv "-d spreadsheet -f csv --stdout %P"
FileFilter .ots unoconv "-d spreadsheet -f csv --stdout %P"
FileFilter .dbf unoconv "-d spreadsheet -f csv --stdout %P"
FileFilter .dif unoconv "-d spreadsheet -f csv --stdout %P"
FileFilter .uos unoconv "-d spreadsheet -f csv --stdout %P"
FileFilter .sxc unoconv "-d spreadsheet -f csv --stdout %P"
# word documents
FileFilterMatch unoconv "-d document -f txt --stdout %P" /\.doc.*/i
FileFilterMatch unoconv "-d document -f txt --stdout %P" /\.odt.*/i
FileFilterMatch unoconv "-d document -f txt --stdout %P" /\.rtf.*/i
FileFilterMatch unoconv "-d document -f txt --stdout %P" /\.tex$/i
# native html support
IndexContents HTML* .htm .html .shtml
IndexContents XML* .xml
EOF
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_verbose "Using swish-e to create index."
swish-e -c $swishrc -S fs -v3
rm -f $swishrc
}
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_message "Search index updated."
done
}
search_tombs() {
{ command -v locate >& - } || {
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_failure "Cannot index tombs on this system: updatedb (mlocate) not installed." }
updatedbver=`updatedb --version | grep '^updatedb'`
[[ "$updatedbver" =~ "GNU findutils" ]] && {
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_warning "Cannot use GNU findutils for index/search commands." }
[[ "$updatedbver" =~ "mlocate" ]] || {
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_failure "Index command needs 'mlocate' to be installed." }
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_verbose "$updatedbver"
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# list all open tombs
mounted_tombs=(`list_tomb_mounts`)
if [ ${#mounted_tombs} = 0 ]; then
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_failure "I can't see any open tomb, may they all rest in peace."; fi
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# TODO: Fix string
_success "Searching for: $fg_bold[white]::1::$fg_no_bold[white]" ${(f)@}
for t in ${mounted_tombs}; do
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_verbose "Checking for index: ::1::" ${t}
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mapper=`basename ${t[(ws:;:)1]}`
tombname=${t[(ws:;:)5]}
tombmount=${t[(ws:;:)2]}
if [ -r ${tombmount}/.updatedb ]; then
# use mlocate to search hits on filenames
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_message "Searching filenames in tomb ::1 tomb name::" $tombname
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locate -d ${tombmount}/.updatedb -e -i "${(f)@}"
_message "Matches found: `locate -d ${tombmount}/.updatedb -e -i -c ${(f)@}`"
# use swish-e to search over contents
{ test $SWISH = 1 } && { test -r $tombmount/.swish } && {
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_message "Searching contents in tomb ::1 tomb name::" $tombname
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swish-search -w ${=@} -f $tombmount/.swish -H0 }
else
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_warning "Skipping tomb ::1 tomb name::: not indexed." $tombname
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_warning "Run 'tomb index' to create indexes."
fi
done
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_message "Search completed."
}
# }}} - Index and search
# {{{ Resize
# resize tomb file size
resize_tomb() {
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_message "Commanded to resize tomb ::1 tomb name:: to ::2 size:: megabytes." $1 $opts[-s]
if ! [ $1 ]; then
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_failure "No tomb name specified for resizing."
elif ! [ -r "$1" ]; then
_failure "Cannot find ::1::" $1
fi
# $1 is the tomb file path
newtombsize="`option_value -s`"
{ test "$newtombsize" = "" } && {
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_failure "Aborting operations: new size was not specified, use -s" }
tombdir=`dirname $1`
tombfile=`basename $1`
tombname=${tombfile%%\.*}
# load key from options or file
load_key
########
local oldtombsize=$(( `stat -c %s "$1" 2>-` / 1048576 ))
local mounted_tomb=`mount -l |
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awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 }'`
if [ "$mounted_tomb" ]; then
_failure "The tomb ::1 tomb name:: is open, to resize it it needs to be closed." $tombname
fi
if ! [ "$newtombsize" ] ; then
_failure "You must specify the new size of ::1 tomb name::" $tombname
elif [[ $newtombsize != <-> ]]; then
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_failure "Size is not an integer."
elif [ "$newtombsize" -le "$oldtombsize" ]; then
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_failure "The new size must be greater then old tomb size."
fi
delta="$(( $newtombsize - $oldtombsize ))"
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2014-08-29 10:07:33 +00:00
_message "Generating ::1 tomb file:: of MiB" $tombfile $newtombsize
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_verbose "Data dump using ::1:: from /dev/urandom" ${DD[1]}
${=DD} if=/dev/urandom bs=1048576 count=${delta} >> ${tombdir}/${tombfile}
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{ test $? = 0 } || {
_failure "Error creating the extra resize ::1 size::, operation aborted." $tmp_resize }
if option_is_set --tomb-pwd; then
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tomb_pwd="`option_value --tomb-pwd`"
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_verbose "tomb-pwd = ::1 tomb pass::" $tomb_pwd
ask_key_password "$tomb_pwd"
else
ask_key_password
fi
{ test $? = 0 } || {
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_failure "No valid password supplied." }
lo_mount "${tombdir}/${tombfile}"
nstloop=`lo_new`
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mapdate=`date +%s`
mapper="tomb.${tombname}.${mapdate}.`basename $nstloop`"
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print -n - "$tomb_secret" | \
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cryptsetup --key-file - luksOpen ${nstloop} ${mapper}
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if ! [ -r /dev/mapper/${mapper} ]; then
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_failure "Failure mounting the encrypted file."
fi
cryptsetup resize "${mapper}"
if [ $? != 0 ]; then
_failure "cryptsetup failed to resize ::1 mapper::" $mapper
fi
e2fsck -p -f /dev/mapper/${mapper}
if [ $? != 0 ]; then
_failure "e2fsck failed to check ::1 mapper::" $mapper
fi
resize2fs /dev/mapper/${mapper}
if [ $? != 0 ]; then
_failure "resize2fs failed to resize ::1 mapper::" $mapper
fi
sleep 1 # needs to settle a bit
# close and free the loop device
cryptsetup luksClose "${mapper}"
return 0
}
# }}}
# {{{ Close
umount_tomb() {
local tombs how_many_tombs
local pathmap mapper tombname tombmount loopdev
local ans pidk pname
if [ "$1" = "all" ]; then
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mounted_tombs=(`list_tomb_mounts`)
else
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mounted_tombs=(`list_tomb_mounts $1`)
fi
{ test ${#mounted_tombs} = 0 } && {
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_warning "There is no open tomb to be closed."
return 1 }
{ test ${#mounted_tombs} -gt 1 } && { test "$1" = "" } && {
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_warning "Too many tombs mounted, please specify one (see tomb list)"
_warning "or issue the command 'tomb close all' to close them all."
return 1 }
2011-05-09 07:11:18 +00:00
2014-08-29 10:07:33 +00:00
_message "Tomb close ::1::" $1
for t in ${mounted_tombs}; do
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mapper=`basename ${t[(ws:;:)1]}`
tombname=${t[(ws:;:)5]}
tombmount=${t[(ws:;:)2]}
tombfs=${t[(ws:;:)3]}
tombfsopts=${t[(ws:;:)4]}
tombloop=${mapper[(ws:.:)4]}
2014-08-29 10:31:23 +00:00
_verbose "Name: ::1 tomb name::" $tombname
_verbose "Mount: ::1 mount point::" $tombmount
_verbose "Mapper: ::1 mapper::" $mapper
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{ test -e "$mapper" } && {
2014-08-29 09:33:56 +00:00
_warning "Tomb not found: ::1 tomb file::" $1
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_warning "Please specify an existing tomb."
return 0 }
if [ $SLAM ]; then
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_success "Slamming tomb ::1 tomb name:: mounted on ::2 mount point::" $tombname $tombmount
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_message "Kill all processes busy inside the tomb."
if ! slam_tomb "$tombmount"; then
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_warning "Cannot slam the tomb ::1 tomb name::" $tombname
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return 1
fi
else
2014-08-29 10:07:33 +00:00
_message "Closing tomb ::1 tomb name:: mounted on ::2 mount point::" $tombname $tombmount
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fi
# check if there are binded dirs and close them
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bind_tombs=(`list_tomb_binds $tombname`)
for b in ${bind_tombs}; do
bind_mapper="${b[(ws:;:)1]}"
bind_mount="${b[(ws:;:)2]}"
2014-08-29 10:07:33 +00:00
_message "Closing tomb bind hook: ::1 hook::" $bind_mount
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umount $bind_mount
if [[ $? != 0 ]]; then
if [ $SLAM ]; then
_success "Slamming tomb: killing all processes using this hook."
slam_tomb "$bind_mount"
if [[ $? == 1 ]]; then
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_warning "Cannot slam the bind hook ::1 hook::" $bind_mount
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return 1
fi
umount $bind_mount
else
2014-08-29 09:33:56 +00:00
_warning "Tomb bind hook ::1 hook:: is busy, cannot close tomb." $bind_mount
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fi
fi
done
# Execute post-hooks for eventual cleanup
2014-07-13 15:35:28 +00:00
if ! option_is_set -n ; then
exec_safe_post_hooks ${tombmount%%/} close
fi
2014-08-29 10:31:23 +00:00
_verbose "Performing umount of ::1 mount point::" $tombmount
2014-07-13 15:35:28 +00:00
umount ${tombmount}
if ! [ $? = 0 ]; then _warning "Tomb is busy, cannot umount!"
else
# this means we used a "default" mount point
{ test "${tombmount}" = "/media/${tombname}.tomb" } && {
rmdir ${tombmount} }
fi
2014-07-13 15:35:28 +00:00
cryptsetup luksClose $mapper
{ test $? = 0 } || {
2014-08-29 09:33:56 +00:00
_warning "Error occurred in cryptsetup luksClose ::1 mapper::" $mapper
2014-07-13 15:35:28 +00:00
return 1 }
2014-07-13 15:35:28 +00:00
losetup -d "/dev/$tombloop"
2014-08-29 09:26:26 +00:00
_success "Tomb ::1 tomb name:: closed: your bones will rest in peace." $tombname
done # loop across mounted tombs
return 0
}
# Kill all processes using the tomb
slam_tomb() {
# $1 = tomb mount point
if [[ -z `fuser -m "$1" 2>-` ]]; then
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return 0
fi
#Note: shells are NOT killed by INT or TERM, but they are killed by HUP
for s in TERM HUP KILL; do
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_verbose "Sending ::1:: to processes inside the tomb:" $s
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if option_is_set -D; then
ps -fp `fuser -m /media/a.tomb 2>-`|
2014-07-13 15:35:28 +00:00
while read line; do
_verbose $line
done
fi
fuser -s -m "$1" -k -M -$s
if [[ -z `fuser -m "$1" 2>-` ]]; then
2014-07-13 15:35:28 +00:00
return 0
fi
if ! option_is_set -f; then
sleep 3
fi
done
return 1
}
# }}} - Tomb close
# {{{ Main routine
main() {
2014-08-14 07:58:15 +00:00
local -A subcommands_opts
### Options configuration
# Hi, dear developer! Are you trying to add a new subcommand, or
# to add some options? Well, keep in mind that an option CAN'T
# have differente meanings/behaviour in different subcommands.
# For example, "-s" means "size" and accept an argument. If you are tempted to add
# an option "-s" (that means, for example "silent", and doesn't accept an argument)
# DON'T DO IT!
# There are two reasons for that:
# I. usability; user expect that "-s" is "size"
# II. Option parsing WILL EXPLODE if you do this kind of bad things
# (it will say "option defined more than once, and he's right")
#
# If you want to use the same option in multiple commands then
# you can only use the non-abbreviated long-option version like:
# -force and NOT -f
main_opts=(q -quiet=q D -debug=D h -help=h v -version=v U: -uid=U G: -gid=G T: -tty=T -no-color -unsecure-dev-mode)
subcommands_opts[__default]=""
subcommands_opts[open]="f -force n -nohook=n k: -key=k -kdf: o: -ignore-swap -sudo-pwd: -tomb-pwd: "
subcommands_opts[mount]=${subcommands_opts[open]}
subcommands_opts[create]="" # deprecated, will issue warning
subcommands_opts[forge]="f -force -ignore-swap k: -key=k -kdf: o: -tomb-pwd: -use-urandom "
subcommands_opts[dig]="f -force -ignore-swap s: -size=s "
subcommands_opts[lock]="f -force -ignore-swap k: -key=k -kdf: o: -sudo-pwd: -tomb-pwd: "
subcommands_opts[setkey]="k: -key=k f -force -ignore-swap -kdf: -sudo-pwd: -tomb-old-pwd: -tomb-pwd: "
subcommands_opts[engrave]="k: -key=k "
subcommands_opts[passwd]="k: -key=k f -force -ignore-swap -kdf: -tomb-old-pwd: -tomb-pwd: "
subcommands_opts[close]="-sudo-pwd: "
subcommands_opts[help]=""
subcommands_opts[slam]=""
subcommands_opts[list]="-get-mountpoint "
subcommands_opts[index]=""
subcommands_opts[search]=""
subcommands_opts[help]=""
subcommands_opts[bury]="f -force k: -key=k -tomb-pwd: "
subcommands_opts[exhume]="f -force k: -key=k -tomb-pwd: "
# subcommands_opts[decompose]=""
# subcommands_opts[recompose]=""
# subcommands_opts[install]=""
subcommands_opts[askpass]=""
subcommands_opts[source]=""
subcommands_opts[resize]="f -force -ignore-swap s: -size=s k: -key=k -tomb-pwd: "
subcommands_opts[check]="-ignore-swap "
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# subcommands_opts[translate]=""
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### Detect subcommand
local -aU every_opts #every_opts behave like a set; that is, an array with unique elements
for optspec in $subcommands_opts$main_opts; do
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for opt in ${=optspec}; do
every_opts+=${opt}
done
done
local -a oldstar
oldstar=($argv)
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#### detect early: useful for --optiion-parsing
zparseopts -M -D -Adiscardme ${every_opts}
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if [[ -n ${(k)discardme[--option-parsing]} ]]; then
echo $1
if [[ -n "$1" ]]; then
return 1
fi
return 0
fi
unset discardme
if ! zparseopts -M -E -D -Adiscardme ${every_opts}; then
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_failure "Error parsing."
return 127
fi
unset discardme
subcommand=$1
if [[ -z $subcommand ]]; then
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subcommand="__default"
fi
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if [[ -z ${(k)subcommands_opts[$subcommand]} ]]; then
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_warning "There's no such command \"::1 subcommand::\"." $subcommand
exitv=127 _failure "Please try -h for help."
2011-04-10 19:38:01 +00:00
fi
argv=(${oldstar})
unset oldstar
### Parsing global + command-specific options
# zsh magic: ${=string} will split to multiple arguments when spaces occur
set -A cmd_opts ${main_opts} ${=subcommands_opts[$subcommand]}
# if there is no option, we don't need parsing
2013-05-25 13:05:21 +00:00
if [[ -n $cmd_opts ]]; then
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zparseopts -M -E -D -Aopts ${cmd_opts}
if [[ $? != 0 ]]; then
_warning "Some error occurred during option processing."
exitv=127 _failure "See \"tomb help\" for more info."
2014-07-13 15:35:28 +00:00
fi
fi
#build PARAM (array of arguments) and check if there are unrecognized options
ok=0
PARAM=()
for arg in $*; do
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if [[ $arg == '--' || $arg == '-' ]]; then
ok=1
continue #it shouldnt be appended to PARAM
elif [[ $arg[1] == '-' ]]; then
if [[ $ok == 0 ]]; then
exitv=127 _failure "Unrecognized option ::1 arg:: for subcommand ::2 subcommand::" $arg $subcommand
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fi
fi
PARAM+=$arg
done
#first parameter actually is the subcommand: delete it and shift
if [[ $subcommand != '__default' ]]; then
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PARAM[1]=()
shift
fi
### End parsing command-specific options
if ! option_is_set --no-color; then
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autoload colors; colors
fi
if ! option_is_set --unsecure-dev-mode; then
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for opt in --sudo-pwd --tomb-pwd --use-urandom --tomb-old-pwd; do
if option_is_set $opt; then
exitv=127 _failure "You specified option ::1 option::, which is DANGEROUS and should only be used for testing\nIf you really want so, add --unsecure-dev-mode" $opt
2014-07-13 15:35:28 +00:00
fi
done
fi
# when we run as root, we remember the original uid:gid
2013-05-25 13:05:21 +00:00
# to set permissions for the calling user and drop privileges
if option_is_set -U; then _uid="`option_value -U`"; fi
if option_is_set -G; then _gid="`option_value -G`"; fi
if option_is_set -T; then _tty="`option_value -T`"; fi
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_verbose "Tomb command: ::1 subcommand:: ::2 param::" $subcommand $PARAM
_verbose "Caller: uid[::1 uid::], gid[::2 gid::], tty[::3 tty::]." $_uid $_gid $_tty
case "$subcommand" in
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# new creation in three steps
forge)
check_priv
forge_key ${=PARAM}
;;
dig)
dig_tomb ${=PARAM}
;;
lock)
check_priv
lock_tomb_with_key ${=PARAM}
;;
setkey)
check_priv
change_tomb_key ${=PARAM}
;;
engrave)
{ test "$QRENCODE" = 0 } && {
_failure "QREncode not installed: cannot engrave keys on paper." }
engrave_key ${=PARAM}
;;
# backward compat
create)
_warning "The create command is deprecated, please use dig, forge and lock instead."
_warning "For more informations see Tomb's manual page (man tomb)."
;;
mount|open)
check_priv
mount_tomb $PARAM[1] $PARAM[2]
;;
umount|close|slam)
check_priv
[ "$subcommand" = "slam" ] && SLAM=1
umount_tomb $PARAM[1]
;;
passwd)
change_passwd $PARAM[1]
;;
list)
list_tombs $PARAM[1]
;;
index)
index_tombs $PARAM[1]
;;
search)
search_tombs ${=PARAM}
;;
help)
usage
;;
bury)
{ test "$STEGHIDE" = 0 } && {
_failure "Steghide not installed: cannot bury keys into images." }
bury_key $PARAM[1]
;;
exhume)
{ test "$STEGHIDE" = 0 } && {
_failure "Steghide not installed: cannot exhume keys from images." }
exhume_key $PARAM[1]
;;
resize)
{ test "$RESIZER" = 0 } && {
_failure "Resize2fs not installed: cannot resize tombs." }
check_priv
resize_tomb $PARAM[1]
;;
# internal commands useful to developers
'source') return 0 ;;
askpass) ask_password $PARAM[1] $PARAM[2] ;;
__default)
cat <<EOF
Tomb $VERSION - a strong and gentle undertaker for your secrets
Copyright (C) 2007-2014 Dyne.org Foundation, License GNU GPL v3+
This is free software: you are free to change and redistribute it
The latest Tomb sourcecode is published on <http://tomb.dyne.org>
EOF
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option_is_set -v && {
cat <<EOF
This source code 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.
Please refer to the GNU Public License for more details.
System utils:
`sudo -V | head -n1`
`cryptsetup --version`
`pinentry --version`
`gpg --version | head -n1` - key forging algorithms (GnuPG symmetric ciphers):
`list_gnupg_ciphers`
EOF
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return 0
}
usage
;;
*)
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_warning "Command \"::1 subcommand::\" not recognized." $subcommand
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_message "Try -h for help."
return 1
;;
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esac
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return $?
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}
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# }}}
# {{{ Run
check_bin
check_shm
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main $@
ret=$?
if [[ $ret != 0 ]]; then #this "if" seems useless, but avoid source tomb source from exiting
exit $ret
fi
# }}}
# -*- tab-width: 4; indent-tabs-mode:nil; -*-
# vim: set shiftwidth=4 expandtab: