#!/usr/bin/env bash

# tls13.test
# Copyright wolfSSL 2016-2021

# if we can, isolate the network namespace to eliminate port collisions.
if [[ -n "$NETWORK_UNSHARE_HELPER" ]]; then
     if [[ -z "$NETWORK_UNSHARE_HELPER_CALLED" ]]; then
         export NETWORK_UNSHARE_HELPER_CALLED=yes
         exec "$NETWORK_UNSHARE_HELPER" "$0" "$@" || exit $?
     fi
elif [ "${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

# retries to mitigate race on early data:
early_data_try_max=10

# 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 $server_pid 2>/dev/null
        server_pid=$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 $port -l TLS13-AES128-GCM-SHA256 &
server_pid=$!
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 ""

grep -F -e 'NO_CERTS' ./wolfssl/options.h
NO_CERTS=$?
grep -F -e 'WOLFSSL_NO_CLIENT_AUTH' ./wolfssl/options.h
NO_CLIENT_AUTH=$?
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 -F -e '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 $CS
        ./examples/client/client -e | grep -F -e "$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 -F -e 'Early data'
if [ $? -eq 0 ]; then
    early_data=yes
fi
./examples/client/client -? 2>&1 | grep -F -e 'Shared keys'
if [ $? -eq 0 ]; then
    psk=yes
fi

if [ "$early_data" = "yes" ]; then

    early_data_try_num=1
    while :; do

        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 $port >"$client_out_file" 2>&1
        RESULT=$?
        cat "$client_out_file"
        remove_ready_file
        grep -F -e 'Session Ticket' "$client_out_file"
        session_ticket=$?

        # wait for the server to quit and write output
        wait $server_pid

        ed_srv_msg_cnt="$(grep -c -F -e 'Early Data Client message' "$server_out_file")"
        ed_srv_status_cnt="$(grep -c -F -e 'Early Data was' "$server_out_file")"

        echo "earlydata: session_ticket=${session_ticket} ed_srv_msg_cnt=${ed_srv_msg_cnt} ed_srv_status_cnt=${ed_srv_status_cnt}"

        if [ $session_ticket -eq 0 -a $ed_srv_msg_cnt -ne 2 \
                             -a $ed_srv_status_cnt -ne 2 ]; then
            RESULT=1
        fi
        if [ $RESULT -ne 0 ]; then
            echo -e "\n\nIssue with TLS v1.3 Early Data - session ticket"
            if [ $early_data_try_num -lt $early_data_try_max ]; then
                echo -e "retry #${early_data_try_num}...\n"
                : $((++early_data_try_num))
                continue
            fi
            do_cleanup
            exit 1
        fi
        do_cleanup
        break

    done

    echo ""
fi

if [ "$early_data" = "yes" -a "$psk" = "yes" ]; then
    echo -e "\n\nTLS v1.3 Early Data - PSK"
    port=0

    early_data_try_num=1
    while :; do

        (./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

        # wait for the server to quit and write output
        wait $server_pid

        ed_srv_msg_cnt="$(grep -c -F -e 'Early Data Client message' "$server_out_file")"
        ed_srv_status_cnt="$(grep -c -F -e 'Early Data was' "$server_out_file")"

        echo "PSK earlydata: ed_srv_msg_cnt=${ed_srv_msg_cnt} ed_srv_status_cnt=${ed_srv_status_cnt}"

        if [ $ed_srv_msg_cnt -ne 2 -a $ed_srv_status_cnt -ne 1 ]; then
            echo
            echo "Server out file"
            cat "$server_out_file"
            echo
            echo "Found lines"
            grep -F -e 'Early Data' "$server_out_file"
            echo -e "\n\nUnexpected 'Early Data' lines."
            RESULT=1
        fi
        if [ $RESULT -ne 0 ]; then
            echo -e "\n\nIssue with TLS v1.3 Early Data - PSK"
            if [ $early_data_try_num -lt $early_data_try_max ]; then
                echo -e "retry #${early_data_try_num}...\n"
                : $((++early_data_try_num))
                continue
            fi
            do_cleanup
            exit 1
        fi

        break

    done

else
    echo "Early Data not available"
fi

do_cleanup

echo -e "\nALL Tests Passed"

exit 0