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Merge pull request #3340 from metalefty/chkpriv
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make xrdp-chkpriv script fancy
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metalefty authored Dec 13, 2024
2 parents 31a09f5 + a857f0b commit e07cc72
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Showing 3 changed files with 71 additions and 20 deletions.
8 changes: 5 additions & 3 deletions tools/chkpriv/Makefile.am
Original file line number Diff line number Diff line change
Expand Up @@ -3,15 +3,17 @@ xrdppkgdatadir=$(datadir)/xrdp
pkglibexec_PROGRAMS = \
xrdp-droppriv

dist_xrdppkgdata_SCRIPTS = \
nodist_xrdppkgdata_SCRIPTS = \
xrdp-chkpriv

AM_LDFLAGS =

AM_CPPFLAGS = \
-I$(top_srcdir)/common

xrdp_droppriv_SOURCES = xrdp-droppriv.c
xrdp_droppriv_SOURCES = \
xrdp-chkpriv.in \
xrdp-droppriv.c

xrdp_droppriv_LDADD = \
$(top_builddir)/common/libcommon.la \
Expand All @@ -29,5 +31,5 @@ SUFFIXES = .in
.in:
$(subst_verbose)$(SUBST_VARS) $< > $@

CLEANFILES = xrdp-chkpriv
CLEANFILES = $(nodist_xrdppkgdata_SCRIPTS)

83 changes: 66 additions & 17 deletions tools/chkpriv/xrdp-chkpriv.in
100755 → 100644
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,35 @@ SESMAN_INI="$CONF_DIR"/sesman.ini
RSAKEYS_INI="$CONF_DIR"/rsakeys.ini
DROPPRIV=@pkglibexecdir@/xrdp-droppriv

# Helper functions to print colored tag like "[ OK ]"

print_ok()
{
if [ -t 1 ]; then
printf "\033[1m[ \033[1;32mOK\033[0m ]\033[0m "
else
printf "[ OK ] "
fi
}

print_warn()
{
if [ -t 1 ]; then
printf "\033[1m[ \033[1;33mWARN\033[0m ]\033[0m "
else
printf "[ WARN ] "
fi
}

print_ng()
{
if [ -t 1 ]; then
printf "\033[1m[ \033[1;31mNG\033[0m ]\033[0m "
else
printf "[ NG ] "
fi
}

# -----------------------------------------------------------------------------
# G E T I N I V A L U E
#
Expand All @@ -51,6 +80,7 @@ GetIniValue()
# -----------------------------------------------------------------------------

if [ "$(id -u)" != 0 ]; then
print_ng
echo "** Must run this script as root" >&2
exit 1
fi
Expand Down Expand Up @@ -92,37 +122,45 @@ echo

# Basic checks on runtime user/group
if [ -z "$runtime_user" ] && [ -z "$runtime_group" ]; then
echo "-Info- This system is not configured to run xrdp without privilege"
print_warn
echo "This system is not configured to run xrdp without privilege"
exit 0
fi

if [ -z "$runtime_user" ] || [ -z "$runtime_group" ]; then
echo "-Error- Both 'runtime_user' and 'runtime_group' must be set"
print_ng
echo "Both 'runtime_user' and 'runtime_group' must be set"
errors=$(( errors + 1 ))
exit 1
fi

if getent passwd "$runtime_user" >/dev/null ; then
echo "-Info- runtime_user '$runtime_user' appears to exist"
print_ok
echo "runtime_user '$runtime_user' appears to exist"
else
echo "-Error- runtime_user '$runtime_user' does not exist"
print_ng
echo "runtime_user '$runtime_user' does not exist"
errors=$(( errors + 1 ))
fi

GID=
if getent group "$runtime_group" >/dev/null ; then
echo "-Info- runtime_group '$runtime_group' appears to exist"
print_ok
echo "runtime_group '$runtime_group' appears to exist"
GID=$(getent group xrdp | cut -d: -f3)
else
echo "-Error- runtime_group '$runtime_group' does not exist"
print_ng
echo "runtime_group '$runtime_group' does not exist"
errors=$(( errors + 1 ))
fi

# Groups agree between sesman and xrdp?
if [ "$runtime_user" = "$SessionSockdirGroup" ]; then
echo "-Info- xrdp.ini and sesman.ini agree on group ownership"
print_ok
echo "xrdp.ini and sesman.ini agree on group ownership"
else
echo "-Error- xrdp.ini and sesman.ini do not agree on group ownership"
print_ng
echo "xrdp.ini and sesman.ini do not agree on group ownership"
errors=$(( errors + 1 ))
fi

Expand All @@ -144,24 +182,29 @@ if [ -e $RSAKEYS_INI ]; then
set -- $(stat -c "%a %u %g" $RSAKEYS_INI)
esac
if [ "$1/$2/$3" = "640/0/$GID" ]; then
echo "-Info- $RSAKEYS_INI has correct permissions"
print_ok
echo "$RSAKEYS_INI has correct permissions"
else
if [ "$1" != 640 ]; then
echo "-Error- $RSAKEYS_INI should have permissions -rw-r-----"
print_ng
echo "$RSAKEYS_INI should have permissions -rw-r-----"
errors=$(( errors + 1 ))
fi
if [ "$2" != 0 ]; then
echo "-Error- $RSAKEYS_INI should be owned by root"
print_ng
echo "$RSAKEYS_INI should be owned by root"
errors=$(( errors + 1 ))
fi
if [ "$3" != "$GID" ]; then
echo "-Error- $RSAKEYS_INI should be in the $runtime_group group"
print_ng
echo "$RSAKEYS_INI should be in the $runtime_group group"
errors=$(( errors + 1 ))
fi
fi
fi
else
echo "-Error- $RSAKEYS_INI does not exist"
print_ng
echo "$RSAKEYS_INI does not exist"
errors=$(( errors + 1 ))
fi

Expand All @@ -172,26 +215,32 @@ fi
# group to obtain access to /etc/ssl/private/ssl-cert-snakeoil.key
for file in "$certificate" "$key_file"; do
if ! [ -e $file ]; then
echo "-Error- $file does not exist"
print_ng
echo "$file does not exist"
errors=$(( errors + 1 ))
elif ! $DROPPRIV "$runtime_user" "$runtime_group" sh -c '[ -r '"$file"' ]'
then
echo "-Error- $file is not readable by $runtime_user:$runtime_group"
print_ng
echo "$file is not readable by $runtime_user:$runtime_group"
errors=$(( errors + 1 ))
elif $DROPPRIV "$runtime_user" "$runtime_group" sh -c '[ -w '"$file"' ]'
then
echo "-Error- $file is writeable by $runtime_user:$runtime_group"
print_ng
echo "$file is writeable by $runtime_user:$runtime_group"
errors=$(( errors + 1 ))
else
echo "-Info- $file is read-only for $runtime_user:$runtime_group"
print_ok
echo "$file is read-only for $runtime_user:$runtime_group"
fi
done

echo
if [ $errors -eq 0 ]; then
print_ok
echo "-Summary- Permissions appear to be correct to run xrdp unprivileged"
status=0
else
print_ng
echo "-Summary- $errors error(s) found. Please correct these and try again"
status=1
fi
Expand Down
Empty file modified tools/chkpriv/xrdp-droppriv.c
100755 → 100644
Empty file.

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