#!/bin/sh

# tls13.test
# copyright wolfSSL 2016

# if we can, isolate the network namespace to eliminate port collisions.
if [ "${AM_BWRAPPED-}" != "yes" ]; then
    bwrap_path="$(command -v bwrap)"
    if [ -n "$bwrap_path" ]; then
        export AM_BWRAPPED=yes
        exec "$bwrap_path" --unshare-net --dev-bind / / "$0" "$@"
    fi
    unset AM_BWRAPPED
fi

# getting unique port is modeled after resume.test script
# need a unique port since may run the same time as testsuite
# use server port zero hack to get one
port=0
no_pid=-1
server_pid=$no_pid
counter=0
# let's use absolute path to a local dir (make distcheck may be in sub dir)
# also let's add some randomness by adding pid in case multiple 'make check's
# per source tree
ready_file=`pwd`/wolfssl_tls13_ready$$
client_file=`pwd`/wolfssl_tls13_client$$
# Server output
server_out_file=`pwd`/wolfssl_tls13_server_out$$
# Client output
client_out_file=`pwd`/wolfssl_tls13_client_out$$

echo "ready file $ready_file"

create_port() {
    while [ ! -s $ready_file ]; do
        if [ "$counter" -gt 50 ]; then
            break
        fi
        echo -e "waiting for ready file..."
        sleep 0.1
        counter=$((counter+ 1))
    done

    if [ -e $ready_file ]; then
        echo -e "found ready file, starting client..."

        # sleep for an additional 0.1 to mitigate race on write/read of $ready_file:
        sleep 0.1

        # get created port 0 ephemeral port
        port=`cat $ready_file`
    else
        echo -e "NO ready file ending test..."
        do_cleanup
    fi
}

remove_ready_file() {
    if [ -e $ready_file ]; then
        echo -e "removing existing ready file"
        rm $ready_file
    fi
}

do_cleanup() {
    echo "in cleanup"

    if  [ $server_pid != $no_pid ]
    then
        echo "killing server"
        kill -9 $server_pid
        server_pid=$no_pid
    fi
    remove_ready_file
    if [ -e $client_file ]; then
        echo -e "removing existing client file"
        rm $client_file
    fi
    if [ -e $server_out_file ]; then
        echo -e "removing existing server output file"
        rm $server_out_file
    fi
    if [ -e $client_out_file ]; then
        echo -e "removing existing client output file"
        rm $client_out_file
    fi
}

do_trap() {
    echo "got trap"
    do_cleanup
    exit -1
}

trap do_trap INT TERM

[ ! -x ./examples/client/client ] && echo -e "\n\nClient doesn't exist" && exit 1
./examples/client/client '-?' 2>&1 | grep -- 'Client not compiled in!'
if [ $? -eq 0 ]; then
    exit 0
fi
./examples/server/server '-?' 2>&1 | grep -- 'Server not compiled in!'
if [ $? -eq 0 ]; then
    exit 0
fi

# Usual TLS v1.3 server / TLS v1.3 client.
echo -e "\n\nTLS v1.3 server with TLS v1.3 client"
port=0
./examples/server/server -v 4 -R $ready_file -p $port &
server_pid=$!
create_port
./examples/client/client -v 4 -p $port | tee $client_file
RESULT=$?
remove_ready_file
if [ $RESULT -ne 0 ]; then
    echo -e "\n\nTLS v1.3 not enabled"
    do_cleanup
    exit 1
fi
echo ""

# TLS 1.3 cipher suites server / client.
echo -e "\n\nTLS v1.3 cipher suite mismatch"
port=0
./examples/server/server -v 4 -R $ready_file -p $port -l TLS13-CHACHA20-POLY1305-SHA256 &
server_pid=$!
create_port
./examples/client/client -v 4 -p $port -l TLS13-AES256-GCM-SHA384
RESULT=$?
remove_ready_file
if [ $RESULT -eq 0 ]; then
    echo -e "\n\nIssue with mismatched TLS v1.3 cipher suites"
    do_cleanup
    exit 1
fi
do_cleanup
echo ""

cat ./wolfssl/options.h | grep -- 'NO_CERTS'
NO_CERTS=$?
cat ./wolfssl/options.h | grep -- 'WOLFSSL_NO_CLIENT_AUTH'
NO_CLIENT_AUTH=$?
if [ $NO_CERTS -ne 0 -a $NO_CLIENT_AUTH -ne 0 ]; then
    # TLS 1.3 mutual auth required but client doesn't send certificates.
    echo -e "\n\nTLS v1.3 mutual auth fail"
    port=0
    ./examples/server/server -v 4 -F -R $ready_file -p $port &
    server_pid=$!
    create_port
    ./examples/client/client -v 4 -x -p $port
    RESULT=$?
    remove_ready_file
    if [ $RESULT -eq 0 ]; then
        echo -e "\n\nIssue with requiring mutual authentication"
        do_cleanup
        exit 1
    fi
    do_cleanup
    echo ""
fi

# Check for TLS 1.2 support
./examples/client/client -v 3 2>&1 | grep -- 'Bad SSL version'
if [ $? -ne 0 ]; then
    # TLS 1.3 server / TLS 1.2 client.
    echo -e "\n\nTLS v1.3 server downgrading to TLS v1.2"
    port=0
    ./examples/server/server -v 4 -R $ready_file -p $port &
    server_pid=$!
    create_port
    ./examples/client/client -v 3 -p $port
    RESULT=$?
    remove_ready_file
    if [ $RESULT -eq 0 ]; then
        echo -e "\n\nIssue with TLS v1.3 server downgrading to TLS v1.2"
        do_cleanup
        exit 1
    fi
    do_cleanup
    echo ""

    # TLS 1.2 server / TLS 1.3 client.
    echo -e "\n\nTLS v1.3 client upgrading server to TLS v1.3"
    port=0
    ./examples/server/server -v 3 -R $ready_file -p $port &
    server_pid=$!
    create_port
    ./examples/client/client -v 4 -p $port
    RESULT=$?
    remove_ready_file
    if [ $RESULT -eq 0 ]; then
        echo -e "\n\nIssue with TLS v1.3 client upgrading server to TLS v1.3"
        do_cleanup
        exit 1
    fi
    do_cleanup
    echo ""

    echo "Find usable TLS 1.2 cipher suite"
    for CS in ECDHE-RSA-AES128-GCM-SHA256 DHE-RSA-AES128-GCM-SHA256
    do
        echo $CS
        ./examples/client/client -e | grep $CS >/dev/null
        if [ "$?" = "0" ]; then
            TLS12_CS=$CS
            break
        fi
        do_cleanup
    done
    if [ "$TLS12_CS" != "" ]; then
        # TLS 1.3 downgrade server and client - no common TLS 1.3 ciphers
        echo -e "\n\nTLS v1.3 downgrade server and client - no common TLS 1.3 ciphers"
        port=0
        SERVER_CS="TLS13-AES256-GCM-SHA384:$TLS12_CS"
        CLIENT_CS="TLS13-AES128-GCM-SHA256:$TLS12_CS"
        ./examples/server/server -v d -l $SERVER_CS -R $ready_file -p $port &
        server_pid=$!
        create_port
        ./examples/client/client -v d -l $CLIENT_CS -p $port
        RESULT=$?
        remove_ready_file
        if [ $RESULT -eq 0 ]; then
            echo -e "\n\nTLS v1.3 downgrading to TLS v1.2 due to ciphers"
            do_cleanup
            exit 1
        fi
        do_cleanup
        echo ""
    else
        echo "No usable TLS 1.2 cipher suite found"
    fi
fi

# Check for EarlyData support
./examples/client/client -? 2>&1 | grep -- 'Early data'
if [ $? -eq 0 ]; then
    early_data=yes
fi
./examples/client/client -? 2>&1 | grep -- 'Shared keys'
if [ $? -eq 0 ]; then
    psk=yes
fi

if [ "$early_data" = "yes" ]; then
    echo -e "\n\nTLS v1.3 Early Data - session ticket"
    port=0
    (./examples/server/server -v 4 -r -0 -R $ready_file -p $port 2>&1 | \
            tee $server_out_file) &
    server_pid=$!
    create_port
    ./examples/client/client -v 4 -r -0 -p $port 2>&1 >$client_out_file
    RESULT=$?
    cat $client_out_file
    remove_ready_file
    grep 'Session Ticket' $client_out_file
    session_ticket=$?
    early_data_cnt=`grep 'Early Data' $server_out_file | wc -l`
    if [ $session_ticket -eq 0 -a $early_data_cnt -ne 2 ]; then
        RESULT=1
    fi
    if [ $RESULT -ne 0 ]; then
        echo -e "\n\nIssue with TLS v1.3 Early Data - session ticket"
        do_cleanup
        exit 1
    fi
    do_cleanup
    echo ""
fi

if [ "$early_data" = "yes" -a "$psk" = "yes" ]; then
    echo -e "\n\nTLS v1.3 Early Data - PSK"
    port=0
    (./examples/server/server -v 4 -s -0 -R $ready_file -p $port 2>&1 | \
            tee $server_out_file) &
    server_pid=$!
    create_port
    ./examples/client/client -v 4 -s -0 -p $port
    RESULT=$?
    remove_ready_file
    early_data_cnt=`grep 'Early Data' $server_out_file | wc -l`
    if [ $early_data_cnt -ne 2 -a $early_data_cnt -ne 4 ]; then
        RESULT=1
    fi
    if [ $RESULT -ne 0 ]; then
        echo -e "\n\nIssue with TLS v1.3 Early Data - session ticket"
        do_cleanup
        exit 1
    fi
else
    echo "Early Data not available"
fi

do_cleanup

echo -e "\nALL Tests Passed"

exit 0