wolfssl-sys 4.0.0

#!/usr/bin/env bash

# ocsp-stapling2.test
# Test requires HAVE_OCSP and HAVE_CERTIFICATE_STATUS_REQUEST_V2

SCRIPT_DIR="$(dirname "$0")"

# 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

if [[ -z "${RETRIES_REMAINING-}" ]]; then
    export RETRIES_REMAINING=2
fi

[ ! -x ./examples/client/client ] && printf '\n\n%s\n' "Client doesn't exist" \
                                  && exit 1

[ ! -x ./examples/server/server ] && printf '\n\n%s\n' "Server doesn't exist" \
                                  && exit 1

if ./examples/client/client -? 2>&1 | grep "Client not compiled in!" ; then
    echo 'skipping ocsp-stapling2.test because client not compiled in.' 1>&2
    exit 77
fi

if ./examples/server/server -? 2>&1 | grep "Server not compiled in!" ; then
    echo 'skipping ocsp-stapling2.test because server not compiled in.' 1>&2
    exit 77
fi

if ! ./examples/client/client -V | grep -q 3; then
    echo 'skipping ocsp-stapling2.test because TLS1.2 is not available.' 1>&2
    exit 77
fi

if ./examples/client/client '-#' | grep -F -q -e ' -DWOLFSSL_SNIFFER '; then
    echo 'skipping oscp-stapling2.test because WOLFSSL_SNIFFER defined.'
    exit 77
fi

if openssl s_server -help 2>&1 | grep -F -q -i ipv6 && nc -h 2>&1 | grep -F -q -i ipv6; then
    IPV6_SUPPORTED=yes
else
    IPV6_SUPPORTED=no
fi

if ./examples/client/client '-#' | grep -F -q -e ' -DTEST_IPV6 '; then
    if [[ "$IPV6_SUPPORTED" == "no" ]]; then
        echo 'Skipping IPV6 test in environment lacking IPV6 support.'
        exit 77
    fi
    LOCALHOST='[::1]'
    LOCALHOST_FOR_NC='-6 ::1'
else
    LOCALHOST='127.0.0.1'
    LOCALHOST_FOR_NC='127.0.0.1'
fi

PARENTDIR="$PWD"

# create a unique workspace directory ending in PID for the script instance ($$)
# to make this instance orthogonal to any others running, even on same repo.
# TCP ports are also carefully formed below from the PID, to minimize conflicts.

WORKSPACE="${PARENTDIR}/workspace.pid$$"

mkdir "${WORKSPACE}" || exit $?
cp -pR "${SCRIPT_DIR}"/../certs "${WORKSPACE}"/ || exit $?
cd "$WORKSPACE" || exit $?
ln -s ../examples .

CERT_DIR="certs/ocsp"


ready_file1="$WORKSPACE"/wolf_ocsp_s2_readyF1$$
ready_file2="$WORKSPACE"/wolf_ocsp_s2_readyF2$$
ready_file3="$WORKSPACE"/wolf_ocsp_s2_readyF3$$
ready_file4="$WORKSPACE"/wolf_ocsp_s2_readyF4$$
ready_file5="$WORKSPACE"/wolf_ocsp_s2_readyF5$$
printf '%s\n' "ready file 1:  $ready_file1"
printf '%s\n' "ready file 2:  $ready_file2"
printf '%s\n' "ready file 3:  $ready_file3"
printf '%s\n' "ready file 4:  $ready_file4"
printf '%s\n' "ready file 5:  $ready_file5"

test_cnf="ocsp_s2.cnf"

wait_for_readyFile(){

    counter=0

    while [ ! -s "$1" ] && [ "$counter" -lt 20 ]; do
        if [[ -n "${2-}" ]]; then
            if ! kill -0 "$2" 2>&-; then
                echo "pid $2 for port ${3-} exited before creating ready file.  bailing..."
                exit 1
            fi
        fi
        echo -e "waiting for ready file..."
        sleep 0.1
        counter=$((counter+ 1))
    done

    if test -e "$1"; then
        echo -e "found ready file, starting client..."
    else
        echo -e "NO ready file at $1 -- ending test..."
        exit 1
    fi

}

remove_single_rF(){
    if test -e "$1"; then
        printf '%s\n' "removing ready file: $1"
        rm "$1"
    fi
}

#create a configure file for cert generation with the port 0 solution
create_new_cnf() {
    printf '%s\n' "Random Ports Selected: $1 $2 $3 $4"

    {
        printf '%s\n' "#"
        printf '%s\n' "# openssl configuration file for OCSP certificates"
        printf '%s\n' "#"
        printf '%s\n' ""
        printf '%s\n' "# Extensions to add to a certificate request (intermediate1-ca)"
        printf '%s\n' "[ v3_req1 ]"
        printf '%s\n' "basicConstraints       = CA:false"
        printf '%s\n' "subjectKeyIdentifier   = hash"
        printf '%s\n' "authorityKeyIdentifier = keyid:always,issuer:always"
        printf '%s\n' "keyUsage               = nonRepudiation, digitalSignature, keyEncipherment"
        printf '%s\n' "authorityInfoAccess    = OCSP;URI:http://127.0.0.1:$1"
        printf '%s\n' ""
        printf '%s\n' "# Extensions to add to a certificate request (intermediate2-ca)"
        printf '%s\n' "[ v3_req2 ]"
        printf '%s\n' "basicConstraints       = CA:false"
        printf '%s\n' "subjectKeyIdentifier   = hash"
        printf '%s\n' "authorityKeyIdentifier = keyid:always,issuer:always"
        printf '%s\n' "keyUsage               = nonRepudiation, digitalSignature, keyEncipherment"
        printf '%s\n' "authorityInfoAccess    = OCSP;URI:http://127.0.0.1:$2"
        printf '%s\n' ""
        printf '%s\n' "# Extensions to add to a certificate request (intermediate3-ca)"
        printf '%s\n' "[ v3_req3 ]"
        printf '%s\n' "basicConstraints       = CA:false"
        printf '%s\n' "subjectKeyIdentifier   = hash"
        printf '%s\n' "authorityKeyIdentifier = keyid:always,issuer:always"
        printf '%s\n' "keyUsage               = nonRepudiation, digitalSignature, keyEncipherment"
        printf '%s\n' "authorityInfoAccess    = OCSP;URI:http://127.0.0.1:$3"
        printf '%s\n' ""
        printf '%s\n' "# Extensions for a typical CA"
        printf '%s\n' "[ v3_ca ]"
        printf '%s\n' "basicConstraints       = CA:true"
        printf '%s\n' "subjectKeyIdentifier   = hash"
        printf '%s\n' "authorityKeyIdentifier = keyid:always,issuer:always"
        printf '%s\n' "keyUsage               = keyCertSign, cRLSign"
        printf '%s\n' "authorityInfoAccess    = OCSP;URI:http://127.0.0.1:$4"
        printf '%s\n' ""
        printf '%s\n' "# OCSP extensions."
        printf '%s\n' "[ v3_ocsp ]"
        printf '%s\n' "basicConstraints       = CA:false"
        printf '%s\n' "subjectKeyIdentifier   = hash"
        printf '%s\n' "authorityKeyIdentifier = keyid:always,issuer:always"
        printf '%s\n' "extendedKeyUsage       = OCSPSigning"
    } > "$test_cnf"

    mv "$test_cnf" "$CERT_DIR/$test_cnf"
    cd "$CERT_DIR" || exit
    CURR_LOC="$PWD"
    printf '%s\n' "echo now in $CURR_LOC"
    ./renewcerts-for-test.sh "$test_cnf"
    cd "$WORKSPACE" || exit
}

remove_ready_file(){
    if test -e "$ready_file1"; then
        printf '%s\n' "removing ready file: $ready_file1"
        rm "$ready_file1"
    fi
    if test -e "$ready_file2"; then
        printf '%s\n' "removing ready file: $ready_file2"
        rm "$ready_file2"
    fi
    if test -e "$ready_file3"; then
        printf '%s\n' "removing ready file: $ready_file3"
        rm "$ready_file3"
    fi
    if test -e "$ready_file4"; then
        printf '%s\n' "removing ready file: $ready_file4"
        rm "$ready_file4"
    fi
    if test -e "$ready_file5"; then
        printf '%s\n' "removing ready file: $ready_file5"
        rm "$ready_file5"
    fi
}

cleanup()
{
    exit_status=$?
    for i in $(jobs -pr)
    do
        kill -s KILL "$i"
    done
    remove_ready_file
    rm "$CERT_DIR/$test_cnf"
    cd "$PARENTDIR" || return 1
    rm -r "$WORKSPACE" || return 1

    if [[ ("$exit_status" == 1) && ($RETRIES_REMAINING -gt 0) ]]; then
        echo "retrying..."
        RETRIES_REMAINING=$((RETRIES_REMAINING - 1))
        exec "$0" "$@"
    fi
}
trap cleanup EXIT INT TERM HUP

[ ! -x ./examples/client/client ] && echo -e "\n\nClient doesn't exist" && exit 1

# check if supported key size is large enough to handle 4096 bit RSA
size="$(./examples/client/client '-?' | grep "Max RSA key")"
size="${size//[^0-9]/}"
if [ -n "$size" ]; then
    printf 'check on max key size of %d ...' "$size"
    if [ "$size" -lt 4096 ]; then
        printf '%s\n' "4096 bit RSA keys not supported"
        exit 0
    fi
    printf 'OK\n'
fi

#get four unique ports

# choose consecutive ports based on the PID, skipping any that are
# already bound, to avoid the birthday problem in case other
# instances are sharing this host.

get_first_free_port() {
    local ret="$1"
    while :; do
        if [[ "$ret" -ge 65536 ]]; then
            ret=1024
        fi
        if ! nc -z ${LOCALHOST_FOR_NC} "$ret"; then
            break
        fi
        ret=$((ret+1))
    done
    echo "$ret"
    return 0
}

base_port=$((((($$ + RETRIES_REMAINING) * 5) % (65536 - 2048)) + 1024))
port1=$(get_first_free_port "$base_port")
port2=$(get_first_free_port $((port1 + 1)))
port3=$(get_first_free_port $((port2 + 1)))
port4=$(get_first_free_port $((port3 + 1)))
port5=$(get_first_free_port $((port4 + 1)))

# 1:
./examples/server/server -R "$ready_file1" -p "$port1" &
server_pid1=$!
wait_for_readyFile "$ready_file1" "$server_pid1" "$port1"
if [ ! -f "$ready_file1" ]; then
    printf '%s\n' "Failed to create ready file1: \"$ready_file1\""
    exit 1
fi
# 2:
./examples/server/server -R "$ready_file2" -p "$port2" &
server_pid2=$!
wait_for_readyFile "$ready_file2" "$server_pid2" "$port2"
if [ ! -f "$ready_file2" ]; then
    printf '%s\n' "Failed to create ready file2: \"$ready_file2\""
    exit 1
fi
# 3:
./examples/server/server -R "$ready_file3" -p "$port3" &
server_pid3=$!
wait_for_readyFile "$ready_file3" "$server_pid3" "$port3"
if [ ! -f "$ready_file3" ]; then
    printf '%s\n' "Failed to create ready file3: \"$ready_file3\""
    exit 1
fi
# 4:
./examples/server/server -R "$ready_file4" -p "$port4" &
server_pid4=$!
wait_for_readyFile "$ready_file4" "$server_pid4" "$port4"
if [ ! -f "$ready_file4" ]; then
    printf '%s\n' "Failed to create ready file4: \"$ready_file4\""
    exit 1
fi

printf '%s\n' "------------- PORTS ---------------"
printf '%s' "Random ports selected: $port1 $port2"
printf '%s\n' " $port3 $port4"
printf '%s\n' "-----------------------------------"
# Use client connections to cleanly shutdown the servers
./examples/client/client -p "$port1"
./examples/client/client -p "$port2"
./examples/client/client -p "$port3"
./examples/client/client -p "$port4"
create_new_cnf "$port1" "$port2" "$port3" \
               "$port4"

sleep 0.1

# setup ocsp responders
# OLD: ./certs/ocsp/ocspd-root-ca-and-intermediate-cas.sh &
# NEW: openssl isn't being cleaned up, invoke directly in script for cleanup
# purposes!
openssl ocsp -port "$port1" -nmin 1                         \
    -index   certs/ocsp/index-ca-and-intermediate-cas.txt \
    -rsigner certs/ocsp/ocsp-responder-cert.pem           \
    -rkey    certs/ocsp/ocsp-responder-key.pem            \
    -CA      certs/ocsp/root-ca-cert.pem                  \
    "$@"                                                  \
    &

# OLD: ./certs/ocsp/ocspd-intermediate2-ca-issued-certs.sh &
# NEW: openssl isn't being cleaned up, invoke directly in script for cleanup
# purposes!
openssl ocsp -port "$port2" -nmin 1                               \
    -index   certs/ocsp/index-intermediate2-ca-issued-certs.txt \
    -rsigner certs/ocsp/ocsp-responder-cert.pem                 \
    -rkey    certs/ocsp/ocsp-responder-key.pem                  \
    -CA      certs/ocsp/intermediate2-ca-cert.pem               \
    "$@"                                                        \
    &

# OLD: ./certs/ocsp/ocspd-intermediate3-ca-issued-certs.sh &
# NEW: openssl isn't being cleaned up, invoke directly in script for cleanup
# purposes!
openssl ocsp -port "$port3" -nmin 1                               \
    -index   certs/ocsp/index-intermediate3-ca-issued-certs.txt \
    -rsigner certs/ocsp/ocsp-responder-cert.pem                 \
    -rkey    certs/ocsp/ocsp-responder-key.pem                  \
    -CA      certs/ocsp/intermediate3-ca-cert.pem               \
    "$@"                                                        \
    &

# NEW: openssl isn't being cleaned up, invoke directly in script for cleanup
# purposes!
openssl ocsp -port "$port4" -nmin 1                         \
    -index   certs/ocsp/index-ca-and-intermediate-cas.txt \
    -rsigner certs/ocsp/ocsp-responder-cert.pem           \
    -rkey    certs/ocsp/ocsp-responder-key.pem            \
    -CA      certs/ocsp/root-ca-cert.pem                  \
    "$@"                                                  \
    &

sleep 0.1
# "jobs" is not portable for posix. Must use bash interpreter!
[ "$(jobs -r | wc -l)" -ne 4 ] && printf '\n\n%s\n' "Setup ocsp responder failed, skipping" && exit 0

printf '\n\n%s\n\n' "All OCSP responders started successfully!"
printf '%s\n\n' "------------- TEST CASE 1 SHOULD PASS ------------------------"
# client test against our own server - GOOD CERTS
./examples/server/server -c certs/ocsp/server3-cert.pem \
                         -k certs/ocsp/server3-key.pem -R "$ready_file5" \
                         -p "$port5" &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 2 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection 1 failed" && exit 1
printf '%s\n\n' "Test PASSED!"

printf '%s\n\n' "------------- TEST CASE 2 SHOULD PASS ------------------------"
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server3-cert.pem \
                         -k certs/ocsp/server3-key.pem -R "$ready_file5" \
                         -p "$port5" &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 3 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection 2 failed" && exit 1
printf '%s\n\n' "Test PASSED!"

printf '%s\n\n' "------------- TEST CASE 3 SHOULD REVOKE ----------------------"
# client test against our own server - REVOKED SERVER CERT
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server4-cert.pem \
                         -k certs/ocsp/server4-key.pem -R "$ready_file5" \
                         -p "$port5" &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 2 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 1 ] && printf '\n\n%s\n' "Client connection succeeded $RESULT" && exit 1
printf '%s\n\n' "Test successfully REVOKED!"

printf '%s\n\n' "------------- TEST CASE 4 SHOULD REVOKE ----------------------"
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server4-cert.pem \
                         -k certs/ocsp/server4-key.pem -R "$ready_file5" \
                         -p "$port5" &
sleep 0.1
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 3 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 1 ] && printf '\n\n%s\n' "Client connection succeeded $RESULT" && exit 1
printf '%s\n\n' "Test successfully REVOKED!"

printf '%s\n\n' "------------- TEST CASE 5 SHOULD PASS ------------------------"
# client test against our own server - REVOKED INTERMEDIATE CERT
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server5-cert.pem \
                         -k certs/ocsp/server5-key.pem -R "$ready_file5" \
                         -p "$port5" &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 2 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection 3 failed $RESULT" && exit 1
printf '%s\n\n' "Test PASSED!"

printf '%s\n\n' "------------- TEST CASE 6 SHOULD REVOKE ----------------------"
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server5-cert.pem \
                         -k certs/ocsp/server5-key.pem -R "$ready_file5" \
                         -p "$port5" &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 3 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 1 ] && printf '\n\n%s\n' "Client connection succeeded $RESULT" && exit 1
printf '%s\n\n' "Test successfully REVOKED!"
printf '%s\n\n' "------------- TEST CASE 7 LOAD CERT IN SSL -------------------"
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server1-cert.pem \
                         -k certs/ocsp/server1-key.pem -R "$ready_file5" \
                         -p "$port5" -H loadSSL &
server_pid5=$!
wait_for_readyFile "$ready_file5" "$server_pid5" "$port5"
echo "test connection" | openssl s_client -status -legacy_renegotiation -connect ${LOCALHOST}:"$port5" -cert ./certs/client-cert.pem -key ./certs/client-key.pem -CAfile ./certs/ocsp/root-ca-cert.pem
RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection failed $RESULT" && exit 1
if ! wait "$server_pid5"; then
    printf '%s\n' "Unexpected server result"
    exit 1
fi
printf '%s\n\n' "Test successful"
printf '%s\n\n' "------------- TEST CASE 8 SHOULD REVOKE ----------------------"
remove_single_rF "$ready_file5"
./examples/server/server -c certs/ocsp/server4-cert.pem \
                         -k certs/ocsp/server4-key.pem -R "$ready_file5" \
                         -p "$port5" -H loadSSL &
server_pid5=$!
sleep 0.1
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 3 -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 1 ] && printf '\n\n%s\n' "Client connection succeeded $RESULT" && exit 1
if ! wait "$server_pid5"; then
    :
else
    printf '%s\n' "Unexpected server result"
    exit 1
fi
printf '%s\n\n' "Test successfully REVOKED!"

# need a unique port since may run the same time as testsuite
# Track ports already assigned in this script run to prevent intra-run collisions
used_ports=()

generate_port() {
    #-------------------------------------------------------------------------#
    # Generate a random port number, guaranteed unique within this script run.
    # Checks both the intra-run used_ports list and system-level bound ports.
    #-------------------------------------------------------------------------#
    local attempts=0 collision p

    while true; do
        if [[ "$OSTYPE" == "linux"* || "$OSTYPE" == "msys"
                                    || "$OSTYPE" == "cygwin" ]]; then
            p=$(($(od -An -N2 /dev/urandom) % (65535-49512) + 49512))
        elif [[ "$OSTYPE" == "darwin"* ]]; then
            p=$(($(od -An -N2 /dev/random) % (65535-49512) + 49512))
        else
            echo "Unknown OS TYPE"
            exit 1
        fi

        # Check against ports already assigned in this run
        collision=0
        for up in "${used_ports[@]}"; do
            if [ "$up" = "$p" ]; then
                collision=1
                break
            fi
        done

        # Also check if the port is already bound on this system
        if [ $collision -eq 0 ]; then
            if command -v ss &>/dev/null; then
                ss -lnt 2>/dev/null | grep -q ":${p}[[:space:]]" && collision=1
            elif command -v netstat &>/dev/null; then
                netstat -lnt 2>/dev/null | grep -q ":${p}[[:space:]]" && collision=1
            fi
        fi

        [ "$collision" -eq 0 ] && break

        ((attempts++))
        if [ "$attempts" -ge 100 ]; then
            echo "ERROR: generate_port could not find a free port after 100 attempts"
            exit 1
        fi
    done

    port=$p
    used_ports+=("$p")
}

# Start OpenSSL server that has no OCSP responses to return
generate_port
openssl s_server -cert ./certs/server-cert.pem -key certs/server-key.pem -www -port "$port" &
MAX_TIMEOUT=10
until nc -z localhost "$port" # Wait for openssl to be ready
do
    sleep 0.05
    if [ "$MAX_TIMEOUT" == "0" ]; then
        break
    fi
    ((MAX_TIMEOUT--))
done

printf '%s\n\n' "------------- TEST CASE 9 SHOULD PASS ----------------------"
# client asks for OCSP staple but doesn't fail when none returned
./examples/client/client -p "$port" -g -v 3 -W 2

RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection 9 failed" && exit 1
printf '%s\n\n' "Test PASSED!"

printf '%s\n\n' "------------- TEST CASE 10 SHOULD UNKNOWN -------------------"
# client asks for OCSP staple but doesn't fail when none returned
./examples/client/client -p "$port" -g -v 3 -W 2m

RESULT=$?
[ $RESULT -ne 1 ] \
                 && printf '\n\n%s\n' "Client connection 10 succeeded $RESULT" \
                 && exit 1
printf '%s\n\n' "Test PASSED!"


if ./examples/client/client -? 2>&1 | grep -q 'DTLS'; then
printf '%s\n\n' "------------- TEST CASE DTLS-1 SHOULD PASS -------------------"
# client test against our own server - GOOD CERTS
./examples/server/server -c certs/ocsp/server3-cert.pem \
                         -k certs/ocsp/server3-key.pem -R "$ready_file5" \
                         -p "$port5" -u -v 3 &
server_pid5=$!
sleep 0.2
./examples/client/client -C -A certs/ocsp/root-ca-cert.pem -W 2 -u -v 3 \
                         -p "$port5"
RESULT=$?
[ $RESULT -ne 0 ] && printf '\n\n%s\n' "Client connection 1 failed" && exit 1
printf '%s\n\n' "Test PASSED!"
fi

printf '%s\n\n' "------------------- TESTS COMPLETE ---------------------------"

exit 0