#!/bin/sh

set -e

TESTNR="03"
BASEDIR="$(pwd)/debian/tests"
COMMONDIR="${BASEDIR}/common"
DIR="${BASEDIR}/${TESTNR}"
PATH="/bin:/usr/bin:/sbin:/usr/sbin"
ACCTA="test${TESTNR}a"
ACCTB="test${TESTNR}b"
PASSWD="test${TESTNR}23456"
HOMEDIRA="/home/${ACCTA}"
HOMEDIRB="/home/${ACCTB}"
LDIFDIR="${DIR}/ldif"

trap '
  kill $(pidof slapd) 2>/dev/null || true
  deluser --remove-home "${ACCTA}" 2>/dev/null || true
  deluser --remove-home "${ACCTB}" 2>/dev/null || true
  mv /etc/disabled.sudoers /etc/sudoers 2>/dev/null || true
' 0 INT QUIT ABRT PIPE TERM

if ! grep -q '^slapd: ALL' /etc/hosts.allow; then
  echo "slapd: ALL" >> /etc/hosts.allow
fi

< ${LDIFDIR}/debconf debconf-set-selections
printf "clean up ldap database ... "
rm -rf /var/lib/ldap/*.mdb
printf "reconfigure slapd ... "
DEBIAN_FRONTEND=noninteractive dpkg-reconfigure -pcritical slapd 2>/dev/null
if ! grep -q '^slapd: ALL$' /etc/hosts.allow; then
  echo "slapd: ALL" >> /etc/hosts.allow
fi
printf "start slapd ... "
slapd -h 'ldap://127.0.0.1:11389/ ldapi:///' -g openldap -u openldap -F /etc/ldap/slapd.d
echo "URI ldap://127.0.0.1:11389" > /etc/ldap/ldap.conf
# ldapsearch -x -LLL -s base -b "" namingContexts should work here
printf "add sudo schema to slapd ... "
< /usr/share/doc/sudo-ldap/schema.olcSudo ldapadd -Y EXTERNAL -H ldapi:/// 2>/dev/null
printf "add sudo group ... "
< ${LDIFDIR}/container.ldif ldapadd -x -D 'cn=admin,dc=example,dc=com' -w ldappw 2>/dev/null
if ! grep -q '^sudoers: ldap$' /etc/nsswitch.conf; then
  sed -i '/^sudoers.*/d' /etc/nsswitch.conf
  echo "sudoers: ldap" >> /etc/nsswitch.conf
fi
touch /etc/ldap/ldap.conf
if ! grep -q '^sudoers_base ou=SUDOers,dc=example,dc=com' /etc/ldap/ldap.conf; then
  echo "sudoers_base ou=SUDOers,dc=example,dc=com" >> /etc/ldap/ldap.conf
fi
printf "reconfigure sudo-ldap (#1001851) ... "
DEBIAN_FRONTEND=noninteractive dpkg-reconfigure -pcritical sudo-ldap 2>/dev/null
printf "cvtsudoers into sudoers.ldif ... "
cvtsudoers -b ou=SUDOers,dc=example,dc=com -o ${LDIFDIR}/sudoers.ldif /etc/sudoers
printf "\n cat sudoers.ldif\n"
cat ${LDIFDIR}/sudoers.ldif
printf "pull sudoers.ldif into ldap ..."
< ${LDIFDIR}/sudoers.ldif ldapadd -x -D 'cn=admin,dc=example,dc=com' -w ldappw
# ldapsearch -x -LLL -b "ou=SUDOers,dc=example,dc=com" should work here
printf "move away sudoers ...\n"
mv /etc/sudoers /etc/disabled.sudoers


printf "========= test %s\.1: account group member, correct password\n" "${TESTNR}"
printf > /etc/hosts "127.0.1.1 %s\n" "$(hostname)"
deluser ${ACCTA} 2>/dev/null || true
adduser --disabled-password --home "${HOMEDIRA}" --gecos "" "${ACCTA}"
printf "%s:%s\n" "${ACCTA}" "${PASSWD}" | chpasswd
adduser "${ACCTA}" sudo
RET=0
printf "trying %s with correct password\n" "${ACCTA}"
su - "${ACCTA}" -c "${COMMONDIR}/asuser ${PASSWD}" || RET=$?
printf "%s with correct password, return value %s\n" "${ACCTA}" "${RET}"
if [ "$(cat ${HOMEDIRA}/stdout)" != "0" ]; then
  printf >&2 "id -u did not give 0\n"
  printf >&2 "stdout:\n"
  cat >&2 ${HOMEDIRA}/stdout
  printf >&2 "stderr:\n"
  cat >&2 ${HOMEDIRA}/stderr
  printf >&2 "exit code %s\n" "${RET}"
  printf >&2 "exit 1\n" "${RET}"
  exit 1
fi

printf "========= test %s\.2: account group member, wrong password\n" "${TESTNR}"
rm -f "${HOMEDIRA}/std*"
RET=0
printf "trying %s with wrong password\n" "${ACCTA}"
su - "${ACCTA}" -c "${COMMONDIR}/asuser wrongpasswd" || RET=$?
printf "%s with wrong password, return value %s\n" "${ACCTA}" "${RET}"
head -n-0 ${HOMEDIRA}/stdout ${HOMEDIRA}/stderr
printf -- "\n-------\n"
for string in "[sudo] password for ${ACCTA}" "Sorry, try again" "sudo: no password was provided" "sudo: 1 incorrect password attempt"; do
  if ! grep -F "${string}" ${HOMEDIRA}/stderr; then
    printf "%s missing in stderr output\n" "${string}"
    printf >&2 "stdout:\n"
    cat >&2 ${HOMEDIRA}/stdout
    printf >&2 "stderr:\n"
    cat >&2 ${HOMEDIRA}/stderr
    printf >&2 "\nexit code %s\n" "${RET}"
    printf >&2 -- "------\n exit 1\n"
    exit 1
  fi
done

printf "========= test %s\.3: account not group member, correct password\n" "${TESTNR}"
deluser ${ACCTB} 2>/dev/null || true
adduser --disabled-password --home "${HOMEDIRB}" --gecos "" "${ACCTB}"
printf "%s:%s\n" "${ACCTB}" "${PASSWD}" | chpasswd
RET=0
printf "trying %s (no sudo membership) with correct password\n" "${ACCTB}"
su - "${ACCTB}" -c "${COMMONDIR}/asuser ${PASSWD}" || RET=$?
printf "%s with correct password, return value %s\n" "${ACCTB}" "${RET}"
head -n-0 ${HOMEDIRB}/stdout ${HOMEDIRB}/stderr
printf -- "\n-------\n"
for string in "[sudo] password for ${ACCTB}" "${ACCTB} is not allowed to run sudo on"; do
  if ! grep -F "${string}" ${HOMEDIRB}/stderr; then
    printf "%s missing in stderr output\n" "${string}"
    printf >&2 "stdout:\n"
    cat >&2 ${HOMEDIRB}/stdout
    printf >&2 "stderr:\n"
    cat >&2 ${HOMEDIRB}/stderr
    printf >&2 "\nexit code %s\n" "${RET}"
    printf >&2 -- "------\n exit 1\n"
    exit 1
  fi
done

printf "test series sucessful, exit 0\n"
exit 0