mirror of
https://github.com/Llewellynvdm/Tomb.git
synced 2024-11-11 07:30:56 +00:00
More cleanup and refactoring.
Now most functions are stable. tomb open -k image.jpg can use images directly as keys, works on tests, but needs more debugging.
This commit is contained in:
Jaromil
parent
5d9caf01e0
commit
16b319c256
106
tomb
106
tomb
@ -58,6 +58,9 @@ MOUNTOPTS="rw,noatime,nodev"
|
||||
# prefix for temporary files
|
||||
TMPPREFIX="/dev/shm/$$.$RANDOM."
|
||||
|
||||
# makes glob matching case insensitive
|
||||
unsetopt CASE_MATCH
|
||||
|
||||
typeset -A global_opts
|
||||
typeset -A opts
|
||||
typeset -h username
|
||||
@ -615,6 +618,42 @@ check_bin() {
|
||||
|
||||
# {{{ 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
|
||||
@ -648,26 +687,13 @@ load_key() {
|
||||
|
||||
_verbose "load_key: ${tomb_key_file}"
|
||||
|
||||
# TODO: move this condition for JPEG steg into is_valid_key
|
||||
[[ `file "$tomb_key_file"` =~ "JP.G" ]] || {
|
||||
# if the key file is an image don't check file header
|
||||
is_valid_key "${tomb_key}" || {
|
||||
_warning "The key seems invalid or its format is not known by this version of Tomb."
|
||||
|
||||
# if no BEGIN header found then we try to recover it
|
||||
_warning "Attempting recovery."
|
||||
_key="$tomb_key"
|
||||
tomb_key=""
|
||||
[[ "$_key" =~ "_KDF_" ]] && {
|
||||
tomb_key+=`print - $_key | $head -n 1` }
|
||||
tomb_key+="-----BEGIN PGP MESSAGE-----"
|
||||
tomb_key+="$_key"
|
||||
tomb_key+="-----END PGP MESSAGE-----"
|
||||
}
|
||||
recover_key "$tomb_key"
|
||||
}
|
||||
|
||||
tomb_key="$tomb_key"
|
||||
tomb_key_file="$tomb_key_file"
|
||||
# declared tomb_key (contents)
|
||||
# declared tomb_key_file (path)
|
||||
return 0
|
||||
}
|
||||
|
||||
@ -689,11 +715,9 @@ gpg_decrypt() {
|
||||
|
||||
else # using status-file in gpg != 1.4.11
|
||||
|
||||
# TODO: use mkfifo
|
||||
tmp_create
|
||||
_status=`tmp_new`
|
||||
# [[ $? = 0 ]] || {
|
||||
# unset gpgpass;
|
||||
# _failure "Fatal error creating temp file." }
|
||||
|
||||
tomb_secret=`print - "$gpgpass" | \
|
||||
gpg --batch --passphrase-fd 0 --no-tty --no-options \
|
||||
@ -738,16 +762,12 @@ get_lukskey() {
|
||||
esac
|
||||
|
||||
# key needs to be exhumed from an image
|
||||
elif [[ "$tomb_key_file" =~ "JP.G" ]]; then
|
||||
tmp_create
|
||||
exhumedkey=`tmp_new`
|
||||
exhume_key "$tomb_key_file" "$_password" "$exhumedkey"
|
||||
tomb_key=`cat $exhumedkey`
|
||||
fi
|
||||
elif [ -r "$tomb_key_file" ] \
|
||||
&& [[ `file "$tomb_key_file"` =~ "JP.G" ]]; then
|
||||
|
||||
# check validity, eventually repair adding headers
|
||||
is_valid_key || {
|
||||
_failure "This key is unusable: $tomb_key_file" }
|
||||
exhume_key "$tomb_key_file" "$_password"
|
||||
|
||||
fi
|
||||
|
||||
gpg_decrypt "$_password" # saves decrypted content into $tomb_secret
|
||||
|
||||
@ -854,24 +874,6 @@ change_passwd() {
|
||||
return 0
|
||||
}
|
||||
|
||||
# $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 }
|
||||
|
||||
[[ "$_key" =~ "BEGIN PGP" ]] && {
|
||||
_message "Key is valid"
|
||||
return 0 }
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
# takes care to encrypt a key
|
||||
# honored options: --kdf --tomb-pwd -o
|
||||
@ -1048,19 +1050,25 @@ exhume_key() {
|
||||
_message "printing exhumed key on stdout" }
|
||||
}
|
||||
|
||||
{ test -r "$imagefile" } || {
|
||||
_failure "Exhume failed, image file not found: $imagefile" }
|
||||
|
||||
[[ `file "$imagefile"` =~ "JP.G" ]] || {
|
||||
_failure "Encode failed: $imagefile is not a jpeg image." }
|
||||
_failure "Exhume failed: $imagefile is not a jpeg image." }
|
||||
|
||||
# when a password is passed as argument then always print out
|
||||
# the exhumed key on stdout without further checks (internal use)
|
||||
{ test "$knownpass" = "" } || {
|
||||
steghide extract -sf "$imagefile" -p "$knownpass" -xf -
|
||||
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 "$tombkey" = "-" } || {
|
||||
if [[ -e "$tombkey" ]]; then
|
||||
if [[ -s "$tombkey" ]]; then
|
||||
_warning "File exists: $tombkey"
|
||||
{ option_is_set -f } || {
|
||||
_warning "Make explicit use of --force to overwrite."
|
||||
|
||||
Loading…
Reference in New Issue
Block a user