mirror of
https://github.com/Kicksecure/security-misc.git
synced 2024-12-26 05:19:28 -05:00
refactoring
This commit is contained in:
Patrick Schleizer
parent
7aea304549
commit
b631e2ecd8
@ -209,198 +209,197 @@ add_nosuid_statoverride_entry() {
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}
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set_file_perms() {
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echo "INFO: START parsing config_file: '$config_file'"
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local line
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while read -r line; do
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if [ "$line" = "" ]; then
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continue
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fi
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if [[ "$line" =~ ^# ]]; then
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continue
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fi
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if [[ "$line" =~ [0-9a-zA-Z/] ]]; then
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true "OK line contains only white listed characters."
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else
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exit_code=200
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echo "ERROR: cannot parse line with invalid character: $line" >&2
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continue
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fi
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#global fso
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local mode_from_config owner_from_config group_from_config capability_from_config
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if ! read -r fso mode_from_config owner_from_config group_from_config capability_from_config <<< "$line" ; then
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exit_code=201
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echo "ERROR: cannot parse line: $line" >&2
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continue
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fi
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local fso_without_trailing_slash
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fso_without_trailing_slash="${fso%/}"
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if [ "$mode_from_config" = "whitelist" ]; then
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## TODO: test/add white spaces inside file name support
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whitelist+="$fso_without_trailing_slash "
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continue
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fi
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if [ "$mode_from_config" = "matchwhitelist" ]; then
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## TODO: test/add white spaces inside file name support
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matchwhitelist+="$fso "
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continue
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fi
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if ! [ -e "$fso" ]; then
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echo "INFO: fso: '$fso' - does not exist. This is likely normal."
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continue
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fi
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## Use dpkg-statoverride so permissions are not reset during upgrades.
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if [ "$mode_from_config" = "nosuid" ]; then
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## If mode_from_config is "nosuid" the config does not set owner and
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## group. Therefore do not enforce owner/group check.
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add_nosuid_statoverride_entry
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else
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local string_length_of_mode_from_config
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string_length_of_mode_from_config="${#mode_from_config}"
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if [ "$string_length_of_mode_from_config" -gt "4" ]; then
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echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
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continue
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fi
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if [ "$string_length_of_mode_from_config" -lt "3" ]; then
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echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
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echo "INFO: START parsing config_file: '$config_file'"
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local line
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while read -r line; do
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if [ "$line" = "" ]; then
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continue
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fi
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if ! getent passwd | grep -q "^${owner_from_config}:" ; then
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echo "ERROR: owner_from_config '$owner_from_config' does not exist!" >&2
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if [[ "$line" =~ ^# ]]; then
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continue
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fi
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if ! getent group | grep -q "^${group_from_config}:" ; then
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echo "ERROR: group_from_config '$group_from_config' does not exist!" >&2
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continue
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fi
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local mode_for_grep
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mode_for_grep="$mode_from_config"
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first_character_of_mode_from_config="${mode_from_config::1}"
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if [ "$first_character_of_mode_from_config" = "0" ]; then
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## Remove leading '0'.
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mode_for_grep="${mode_from_config:1}"
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fi
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local stat_output
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stat_output=""
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if ! stat_output="$(stat -c "%n %a %U %G" "$fso_without_trailing_slash")" ; then
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echo "ERROR: failed to run 'stat' for fso_without_trailing_slash: '$fso_without_trailing_slash'!" >&2
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continue
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fi
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local arr file_name existing_mode existing_owner existing_group
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arr=($stat_output)
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file_name="${arr[0]}"
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existing_mode="${arr[1]}"
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existing_owner="${arr[2]}"
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existing_group="${arr[3]}"
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if [ "$arr" = "" ]; then
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echo "ERROR: arr is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$file_name" = "" ]; then
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echo "ERROR: file_name is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_mode" = "" ]; then
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echo "ERROR: existing_mode is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_owner" = "" ]; then
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echo "ERROR: existing_owner is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_group" = "" ]; then
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echo "ERROR: $existing_group is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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## Check there is an entry for the fso.
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##
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## example: dpkg-statoverride --list | grep /home
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## output:
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## root root 755 /home
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##
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## dpkg-statoverride does not show leading '0'.
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if dpkg-statoverride --list "$fso_without_trailing_slash" >/dev/null ; then
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true "There is an fso entry. Check if owner/group/mode match."
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if dpkg-statoverride --list | grep -q "$owner_from_config $group_from_config $mode_for_grep $fso_without_trailing_slash" ; then
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true "OK The owner/group/mode matches. No further action required."
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else
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true "The owner/group/mode do not match, therefore remove and re-add the entry to update it."
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## fso_without_trailing_slash instead of fso to prevent
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## "dpkg-statoverride: warning: stripping trailing /"
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if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
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true "OK Existing mode already saved previously. No need to save again."
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else
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## Save existing_mode in separate database.
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## Not using --update as not intending to enforce existing_mode.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
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fi
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echo_wrapper_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --remove "$fso_without_trailing_slash"
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## Remove from and add to real database.
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echo_wrapper_audit dpkg-statoverride --remove "$fso_without_trailing_slash"
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echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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## Save in separate database.
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## Not using --update as this is only for saving.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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fi
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if [[ "$line" =~ [0-9a-zA-Z/] ]]; then
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true "OK line contains only white listed characters."
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else
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true "There is no fso entry. Therefore add one."
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if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
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true "OK Existing mode already saved previously. No need to save again."
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else
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## Save existing_mode in separate database.
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## Not using --update as not intending to enforce existing_mode.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
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fi
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## Add to real database.
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echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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## Save in separate database.
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## Not using --update as this is only for saving.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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fi
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fi
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if [ "$capability_from_config" = "" ]; then
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continue
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fi
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if [ "$capability_from_config" = "none" ]; then
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# sudo setcap -r /usr/bin/ping
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# Failed to set capabilities on file `/usr/bin/ping' (No data available)
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# The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
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echo_wrapper_audit setcap -r "$fso"
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else
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if ! capsh --print | grep "Bounding set" | grep -q "$capability_from_config" ; then
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echo "ERROR: capability_from_config '$capability_from_config' does not exist!" >&2
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exit_code=200
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echo "ERROR: cannot parse line with invalid character: $line" >&2
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continue
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fi
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echo_wrapper_audit setcap "${capability_from_config}+ep" "$fso"
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fi
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done < "$config_file"
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echo "INFO: END parsing config_file: '$config_file'"
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#global fso
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local mode_from_config owner_from_config group_from_config capability_from_config
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if ! read -r fso mode_from_config owner_from_config group_from_config capability_from_config <<< "$line" ; then
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exit_code=201
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echo "ERROR: cannot parse line: $line" >&2
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continue
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fi
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local fso_without_trailing_slash
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fso_without_trailing_slash="${fso%/}"
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if [ "$mode_from_config" = "whitelist" ]; then
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## TODO: test/add white spaces inside file name support
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whitelist+="$fso_without_trailing_slash "
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continue
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fi
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if [ "$mode_from_config" = "matchwhitelist" ]; then
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## TODO: test/add white spaces inside file name support
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matchwhitelist+="$fso "
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continue
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fi
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if ! [ -e "$fso" ]; then
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echo "INFO: fso: '$fso' - does not exist. This is likely normal."
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continue
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fi
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## Use dpkg-statoverride so permissions are not reset during upgrades.
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if [ "$mode_from_config" = "nosuid" ]; then
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## If mode_from_config is "nosuid" the config does not set owner and
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## group. Therefore do not enforce owner/group check.
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add_nosuid_statoverride_entry
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else
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local string_length_of_mode_from_config
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string_length_of_mode_from_config="${#mode_from_config}"
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if [ "$string_length_of_mode_from_config" -gt "4" ]; then
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echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
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continue
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fi
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if [ "$string_length_of_mode_from_config" -lt "3" ]; then
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echo "ERROR: Mode '$mode_from_config' is invalid!" >&2
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continue
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fi
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if ! getent passwd | grep -q "^${owner_from_config}:" ; then
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echo "ERROR: owner_from_config '$owner_from_config' does not exist!" >&2
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continue
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fi
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if ! getent group | grep -q "^${group_from_config}:" ; then
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echo "ERROR: group_from_config '$group_from_config' does not exist!" >&2
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continue
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fi
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local mode_for_grep
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mode_for_grep="$mode_from_config"
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first_character_of_mode_from_config="${mode_from_config::1}"
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if [ "$first_character_of_mode_from_config" = "0" ]; then
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## Remove leading '0'.
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mode_for_grep="${mode_from_config:1}"
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fi
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local stat_output
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stat_output=""
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if ! stat_output="$(stat -c "%n %a %U %G" "$fso_without_trailing_slash")" ; then
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echo "ERROR: failed to run 'stat' for fso_without_trailing_slash: '$fso_without_trailing_slash'!" >&2
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continue
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fi
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local arr file_name existing_mode existing_owner existing_group
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arr=($stat_output)
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file_name="${arr[0]}"
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existing_mode="${arr[1]}"
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existing_owner="${arr[2]}"
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existing_group="${arr[3]}"
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if [ "$arr" = "" ]; then
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echo "ERROR: arr is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$file_name" = "" ]; then
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echo "ERROR: file_name is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_mode" = "" ]; then
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echo "ERROR: existing_mode is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_owner" = "" ]; then
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echo "ERROR: existing_owner is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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if [ "$existing_group" = "" ]; then
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echo "ERROR: $existing_group is empty. stat_output: '$stat_output' | line: '$line'" >&2
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continue
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fi
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## Check there is an entry for the fso.
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##
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## example: dpkg-statoverride --list | grep /home
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## output:
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## root root 755 /home
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##
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## dpkg-statoverride does not show leading '0'.
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if dpkg-statoverride --list "$fso_without_trailing_slash" >/dev/null ; then
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true "There is an fso entry. Check if owner/group/mode match."
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if dpkg-statoverride --list | grep -q "$owner_from_config $group_from_config $mode_for_grep $fso_without_trailing_slash" ; then
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true "OK The owner/group/mode matches. No further action required."
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else
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true "The owner/group/mode do not match, therefore remove and re-add the entry to update it."
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## fso_without_trailing_slash instead of fso to prevent
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## "dpkg-statoverride: warning: stripping trailing /"
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if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
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true "OK Existing mode already saved previously. No need to save again."
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else
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## Save existing_mode in separate database.
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## Not using --update as not intending to enforce existing_mode.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
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fi
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echo_wrapper_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --remove "$fso_without_trailing_slash"
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## Remove from and add to real database.
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echo_wrapper_audit dpkg-statoverride --remove "$fso_without_trailing_slash"
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echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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## Save in separate database.
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## Not using --update as this is only for saving.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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fi
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else
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true "There is no fso entry. Therefore add one."
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if dpkg-statoverride $dpkg_admindir_parameter_existing_mode --list "$fso_without_trailing_slash" >/dev/null ; then
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true "OK Existing mode already saved previously. No need to save again."
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else
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## Save existing_mode in separate database.
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## Not using --update as not intending to enforce existing_mode.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_existing_mode --add "$existing_owner" "$existing_group" "$existing_mode" "$fso_without_trailing_slash"
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fi
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## Add to real database.
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echo_wrapper_audit dpkg-statoverride --add --update "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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## Save in separate database.
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## Not using --update as this is only for saving.
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echo_wrapper_silent_audit dpkg-statoverride $dpkg_admindir_parameter_new_mode --add "$owner_from_config" "$group_from_config" "$mode_from_config" "$fso_without_trailing_slash"
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fi
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fi
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if [ "$capability_from_config" = "" ]; then
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continue
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fi
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if [ "$capability_from_config" = "none" ]; then
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# sudo setcap -r /usr/bin/ping
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# Failed to set capabilities on file `/usr/bin/ping' (No data available)
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# The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
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echo_wrapper_audit setcap -r "$fso"
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else
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if ! capsh --print | grep "Bounding set" | grep -q "$capability_from_config" ; then
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echo "ERROR: capability_from_config '$capability_from_config' does not exist!" >&2
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continue
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fi
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echo_wrapper_audit setcap "${capability_from_config}+ep" "$fso"
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fi
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done < "$config_file"
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echo "INFO: END parsing config_file: '$config_file'"
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}
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parse_config_folder() {
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