#!/bin/sh
#
# Copyright (c) 2025 Kungliga Tekniska Högskolan
# (Royal Institute of Technology, Stockholm, Sweden).
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the Institute nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

top_builddir="@top_builddir@"
env_setup="@env_setup@"
objdir="@objdir@"

. ${env_setup}

# Use the main krb5.conf for KDC and admin operations
KRB5_CONFIG="${objdir}/krb5.conf"
export KRB5_CONFIG

testfailed="echo test failed; cat messages.log; exit 1"

# If there is no useful db support compiled in, disable test
${have_db} || exit 77

R=TEST.H5L.SE

port=@port@

kadmin="${kadmin} -l -A -r $R"
kdc="${kdc} --addresses=localhost -P $port"
socksdrawer="${top_builddir}/lib/krb5/socksdrawer"

cache="FILE:${objdir}/cache.krb5"
kdestroy="${kdestroy} -c $cache ${afs_no_unlog}"

rm -f current-db*
rm -f out-*
rm -f mkey.file*

> messages.log

echo "Creating database"
${kadmin} <<EOF || exit 1
init --realm-max-ticket-life=1day --realm-max-renewable-life=1month ${R}
add -p foo --use-defaults foo@${R}
EOF

echo "Doing database check"
${kadmin} check ${R} || exit 1

echo foo > ${objdir}/foopassword

echo "Starting kdc"
${kdc} --detach --testing || { echo "kdc failed to start"; cat messages.log; exit 1; }
kdcpid=`getpid kdc`

# First verify that kinit works without SOCKS (using main krb5.conf)
echo "Verifying kinit works without SOCKS proxy"
${kinit} -c ${cache} ${afs_no_afslog} --password-file=${objdir}/foopassword foo@${R} || \
    { echo "kinit without proxy failed - test setup is broken"; cat messages.log; exit 1; }
${kdestroy} -c ${cache} ${afs_no_unlog}
echo "kinit without SOCKS proxy succeeded"

sockspid=

cleanup() {
    echo "Cleaning up"
    if [ -n "${kdcpid}" ]; then
        kill -9 ${kdcpid} 2>/dev/null
    fi
    if [ -n "${sockspid}" ]; then
        kill -9 ${sockspid} 2>/dev/null
    fi
    trap '' EXIT INT TERM
    cat messages.log
    exit 1
}
trap cleanup EXIT INT TERM

ec=0

# Start socksdrawer in the background
# Arguments: listenport matchhost matchport matchuser host port
# Use a fake KDC hostname (kdc.invalid) to prove the proxy is being used
# The proxy will map kdc.invalid:54321 -> localhost:${port}
echo "Starting socksdrawer"
${socksdrawer} 0 kdc.invalid 54321 foo@${R} localhost ${port} > ${objdir}/socksdrawer.out &
sockspid=$!
sleep 1

# Read the port number that socksdrawer chose
socksport=`cat ${objdir}/socksdrawer.out`
if [ -z "${socksport}" ]; then
    echo "Failed to get SOCKS port from socksdrawer"
    ec=1
    eval "${testfailed}"
fi
echo "socksdrawer listening on port ${socksport}"

# Create krb5-socks.conf with socks4a_proxy for client operations
# Use kdc.invalid:54321 as the KDC - this only works through the proxy
cat > ${objdir}/krb5-socks.conf <<EOF
[libdefaults]
	default_realm = TEST.H5L.SE
	no-addresses = TRUE
	allow_weak_crypto = false
	dns_lookup_kdc = no
	dns_lookup_realm = no
	socks4a_proxy = 127.0.0.1:${socksport}

[realms]
	TEST.H5L.SE = {
		kdc = tcp/kdc.invalid:54321
	}

[logging]
	kdc = 0-/FILE:${objdir}/messages.log
	krb5 = 0-/FILE:${objdir}/messages.log
	default = 0-/FILE:${objdir}/messages.log
EOF

# Use the SOCKS-enabled config for client operations
KRB5_CONFIG="${objdir}/krb5-socks.conf"
export KRB5_CONFIG

kinit="${kinit} -c $cache ${afs_no_afslog}"
klist="${klist} -c $cache"

echo "Getting initial tickets through SOCKS4a proxy"
${kinit} --password-file=${objdir}/foopassword foo@${R} || \
    { ec=1; eval "${testfailed}"; }

echo "Verifying tickets"
${klist} || { ec=1; eval "${testfailed}"; }

echo "Destroying tickets"
${kdestroy} || { ec=1; eval "${testfailed}"; }

echo "Killing socksdrawer"
kill ${sockspid} 2>/dev/null
sockspid=

echo "Test that kinit fails without proxy running"
${kinit} --password-file=${objdir}/foopassword foo@${R} 2>/dev/null && \
    { echo "kinit should have failed without proxy"; ec=1; eval "${testfailed}"; }

echo "Killing kdc (${kdcpid})"
sh ${leaks_kill} kdc $kdcpid || exit 1

trap "" EXIT

exit $ec