1085 lines
35 KiB
Bash
Executable file
1085 lines
35 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
# This Source Code Form is subject to the terms of the Mozilla Public
|
|
# License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
# Authors: Julien Vehent [:ulfr] - 201{3,4}
|
|
# Hubert Kario - 2014
|
|
|
|
# vim: autoindent tabstop=4 shiftwidth=4 expandtab softtabstop=4 filetype=sh
|
|
|
|
DOBENCHMARK=0
|
|
BENCHMARKITER=30
|
|
REALPATH=$(dirname $0)
|
|
# make sure this doesn't error out when readlink -f isn't available (OSX)
|
|
readlink -f $0 &>/dev/null && REALPATH=$(dirname $(readlink -f $0))
|
|
OPENSSLBIN="${REALPATH}/openssl"
|
|
if [ "$(uname -s)" == "Darwin" ]; then
|
|
OPENSSLBIN="${REALPATH}/openssl-darwin64"
|
|
fi
|
|
|
|
# cipherscan requires bash4, which doesn't come by default in OSX
|
|
if [ ${BASH_VERSINFO[0]} -lt 4 ]; then
|
|
echo "Bash version 4 is required to run cipherscan."
|
|
echo "Please upgrade your version of bash (ex: brew install bash)."
|
|
exit 1
|
|
fi
|
|
|
|
# test that timeout or gtimeout (darwin) are present
|
|
TIMEOUTBIN="$(which timeout)"
|
|
|
|
if [ "$TIMEOUTBIN" == "" ]; then
|
|
TIMEOUTBIN="$(which gtimeout)"
|
|
if [ "$TIMEOUTBIN" == "" ]; then
|
|
echo "neither timeout nor gtimeout are present. install coreutils with {apt-get,yum,brew} install coreutils"
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
# Check for busybox, which has different arguments
|
|
TIMEOUTOUTPUT=$(($TIMEOUTBIN --help) 2>&1)
|
|
if [[ "$TIMEOUTOUTPUT" =~ BusyBox ]]; then
|
|
TIMEOUTBIN="$TIMEOUTBIN -t"
|
|
fi
|
|
|
|
# find a list of trusted CAs on the local system, or use the provided list
|
|
if [ -z "$CACERTS" ]; then
|
|
for f in /etc/pki/tls/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt; do
|
|
if [ -e "$f" ]; then
|
|
CACERTS="$f"
|
|
break
|
|
fi
|
|
done
|
|
fi
|
|
if [ ! -e "$CACERTS" ]; then
|
|
CACERTS="$(dirname $0)/ca-bundle.crt"
|
|
fi
|
|
|
|
# RSA ciphers are put at the end to force Google servers to accept ECDSA ciphers
|
|
# (probably a result of a workaround for the bug in Apple implementation of ECDSA)
|
|
CIPHERSUITE="ALL:COMPLEMENTOFALL:+aRSA"
|
|
DEBUG=0
|
|
VERBOSE=0
|
|
DELAY=0
|
|
ALLCIPHERS=0
|
|
OUTPUTFORMAT="terminal"
|
|
TIMEOUT=30
|
|
# place where to put the found intermediate CA certificates and where
|
|
# trust anchors are stored
|
|
CAPATH=""
|
|
SAVECRT=""
|
|
TEST_CURVES="False"
|
|
has_curves="False"
|
|
# openssl formated list of curves that will cause server to select ECC suite
|
|
ecc_ciphers=""
|
|
unset known_certs
|
|
declare -A known_certs
|
|
unset cert_checksums
|
|
declare -A cert_checksums
|
|
|
|
# because running external commands like sleep incurs a fork penalty, we
|
|
# first check if it is necessary
|
|
ratelimit() {
|
|
if [[ $DELAY != "0" ]]; then
|
|
sleep $DELAY
|
|
fi
|
|
}
|
|
|
|
usage() {
|
|
echo -e "usage: $0 [-a|--allciphers] [-b|--benchmark] [--capath directory]
|
|
[--saveca] [--savecrt directory] [-d|--delay seconds] [-D|--debug] [-j|--json]
|
|
[-v|--verbose] [-o|--openssl file] [openssl s_client args] <target:port>
|
|
usage: $0 -h|--help
|
|
|
|
$0 attempts to connect to a target site using all the ciphersuites it knows.
|
|
Julien Vehent [:ulfr] - https://github.com/jvehent/cipherscan
|
|
|
|
Port defaults to 443
|
|
|
|
example: $ $0 www.google.com:443
|
|
|
|
Use one of the options below:
|
|
|
|
-a | --allciphers Test all known ciphers individually at the end.
|
|
-b | --benchmark Activate benchmark mode.
|
|
--capath use CAs from directory (must be in OpenSSL CAdir format)
|
|
--saveca save intermediate certificates in CA directory
|
|
-d | --delay Pause for n seconds between connections
|
|
-D | --debug Output ALL the information.
|
|
-h | --help Shows this help text.
|
|
-j | --json Output results in JSON format.
|
|
-o | --openssl path/to/your/openssl binary you want to use.
|
|
--savecrt path where to save untrusted and leaf certificates
|
|
--[no-]curves test ECC curves supported by server (req. OpenSSL 1.0.2)
|
|
-v | --verbose Increase verbosity.
|
|
|
|
The rest of the arguments will be interpreted as openssl s_client argument.
|
|
This enables checking smtp/imap/pop3/ftp/xmpp via -starttls
|
|
|
|
EXAMPLES: $0 -starttls xmpp jabber.ccc.de:5222
|
|
"
|
|
}
|
|
|
|
verbose() {
|
|
if [ $VERBOSE != 0 ]; then
|
|
echo "$@" >&2
|
|
fi
|
|
}
|
|
|
|
debug(){
|
|
if [ $DEBUG == 1 ]; then
|
|
echo Debug: "$@" >&2
|
|
set -evx
|
|
fi
|
|
}
|
|
|
|
# obtain an array of curves supported by openssl
|
|
CURVES=(sect163k1 # K-163
|
|
sect163r1
|
|
sect163r2 # B-163
|
|
sect193r1
|
|
sect193r2
|
|
sect233k1 # K-233
|
|
sect233r1 # B-233
|
|
sect239k1
|
|
sect283k1 # K-283
|
|
sect283r1 # B-283
|
|
sect409k1 # K-409
|
|
sect409r1 # B-409
|
|
sect571k1 # K-571
|
|
sect571r1 # B-571
|
|
secp160k1
|
|
secp160r1
|
|
secp160r2
|
|
secp192k1
|
|
prime192v1 # P-192 secp192r1
|
|
secp224k1
|
|
secp224r1 # P-224
|
|
secp256k1
|
|
prime256v1 # P-256 secp256r1
|
|
secp384r1 # P-384
|
|
secp521r1 # P-521
|
|
brainpoolP256r1
|
|
brainpoolP384r1
|
|
brainpoolP512r1)
|
|
|
|
# many curves have alternative names, this array provides a mapping to find the IANA
|
|
# name of a curve using its alias
|
|
CURVES_MAP=("sect163k1 K-163"
|
|
"sect163r2 B-163"
|
|
"sect233k1 K-233"
|
|
"sect233r1 B-233"
|
|
"sect283k1 K-283"
|
|
"sect283r1 B-283"
|
|
"sect409k1 K-409"
|
|
"sect409r1 B-409"
|
|
"sect571k1 K-571"
|
|
"sect571r1 B-571"
|
|
"prime192v1 P-192 secp192r1"
|
|
"secp224r1 P-224"
|
|
"prime256v1 P-256 secp256r1"
|
|
"secp384r1 P-384"
|
|
"secp521r1 P-521")
|
|
|
|
get_curve_name() {
|
|
local identifier=$1
|
|
for c in "${CURVES_MAP[@]}"; do
|
|
if [[ "$c" =~ $identifier ]]; then
|
|
verbose "$c matches identifier $identifier"
|
|
local map=(${c// / })
|
|
echo ${map[0]}
|
|
return
|
|
fi
|
|
done
|
|
echo $identifier
|
|
return
|
|
}
|
|
|
|
c_hash() {
|
|
local h=$(${OPENSSLBIN} x509 -hash -noout -in "$1/$2" 2>/dev/null)
|
|
for ((num=0; num<=100; num++)) ; do
|
|
if [[ $1/${h}.${num} -ef $2 ]]; then
|
|
# file already linked, ignore
|
|
break
|
|
fi
|
|
if [[ ! -e $1/${h}.${num} ]]; then
|
|
# file doesn't exist, create a link
|
|
pushd "$1" > /dev/null
|
|
ln -s "$2" "${h}.${num}"
|
|
popd > /dev/null
|
|
break
|
|
fi
|
|
done
|
|
}
|
|
|
|
parse_openssl_output() {
|
|
# clear variables in case matching doesn't hit them
|
|
current_ocspstaple="False"
|
|
current_cipher=""
|
|
current_pfs=""
|
|
current_protocol=""
|
|
current_tickethint="None"
|
|
current_pubkey=0
|
|
current_trusted="False"
|
|
current_sigalg="None"
|
|
|
|
certs_found=0
|
|
current_raw_certificates=()
|
|
|
|
while read line; do
|
|
# check if there isn't OCSP response data (response and responder cert)
|
|
if [[ $line =~ ^====================================== ]]; then
|
|
while read data; do
|
|
# check if there is a OCSP response in output
|
|
if [[ $data =~ OCSP\ Response\ Data ]]; then
|
|
current_ocspstaple="True"
|
|
continue
|
|
fi
|
|
|
|
# skip all data from a OCSP response
|
|
if [[ $data =~ ^====================================== ]]; then
|
|
break
|
|
fi
|
|
done
|
|
continue
|
|
fi
|
|
|
|
# extract selected cipher
|
|
if [[ $line =~ New,\ ]]; then
|
|
local match=($line)
|
|
current_cipher="${match[4]}"
|
|
continue
|
|
fi
|
|
|
|
# extract data about selected temporary key
|
|
if [[ $line =~ Server\ Temp\ Key ]]; then
|
|
local match=($line)
|
|
current_pfs="${match[3]}${match[4]}${match[5]}${match[6]}"
|
|
continue
|
|
fi
|
|
|
|
# extract used protocol
|
|
if [[ $line =~ ^Protocol\ + ]]; then
|
|
local match=($line)
|
|
current_protocol="${match[2]}"
|
|
continue
|
|
fi
|
|
|
|
# extract session ticket hint
|
|
if [[ $line =~ ticket\ lifetime\ hint ]]; then
|
|
local match=($line)
|
|
current_tickethint="${match[5]}"
|
|
continue
|
|
fi
|
|
|
|
# extract size of server public key
|
|
if [[ $line =~ Server\ public\ key\ is\ ]]; then
|
|
local match=($line)
|
|
current_pubkey="${match[4]}"
|
|
continue
|
|
fi
|
|
|
|
# check if connection used trused certificate
|
|
if [[ $line =~ Verify\ return\ code:\ 0 ]]; then
|
|
current_trusted="True"
|
|
continue
|
|
fi
|
|
|
|
# extract certificates
|
|
if [[ $line =~ -----BEGIN\ CERTIFICATE----- ]]; then
|
|
current_raw_certificates[$certs_found]="$line"$'\n'
|
|
while read data; do
|
|
current_raw_certificates[$certs_found]+="$data"$'\n'
|
|
if [[ $data =~ -----END\ CERTIFICATE----- ]]; then
|
|
break
|
|
fi
|
|
done
|
|
certs_found=$((certs_found+1))
|
|
continue
|
|
fi
|
|
done
|
|
|
|
# if we found any certs in output, process the first one and extract
|
|
# the signature algorithm on it (it's the server's certificate)
|
|
if [[ $certs_found -gt 0 ]]; then
|
|
local ossl_out=$(${OPENSSLBIN} x509 -noout -text 2>/dev/null <<<"${current_raw_certificates[0]}")
|
|
while read data; do
|
|
if [[ $data =~ Signature\ Algorithm ]]; then
|
|
local match=($data)
|
|
current_sigalg="${match[2]}"
|
|
fi
|
|
done <<<"$ossl_out"
|
|
fi
|
|
}
|
|
|
|
# Connect to a target host with the selected ciphersuite
|
|
test_cipher_on_target() {
|
|
local sslcommand=$@
|
|
cipher=""
|
|
local cmnd=""
|
|
protocols=""
|
|
pfs=""
|
|
previous_cipher=""
|
|
certificates=""
|
|
for tls_version in "-ssl2" "-ssl3" "-tls1" "-tls1_1" "-tls1_2"
|
|
do
|
|
# sslv2 client hello doesn't support SNI extension
|
|
# in SSLv3 mode OpenSSL just ignores the setting so it's ok
|
|
# -status exception is ignored in SSLv2, go figure
|
|
if [ "$tls_version" == "-ssl2" ]; then
|
|
if [[ "$sslcommand" =~ (.*)(-servername\ [^ ]*)(.*) ]]; then
|
|
cmnd="${BASH_REMATCH[1]} ${BASH_REMATCH[3]}"
|
|
else
|
|
cmnd="$sslcommand"
|
|
fi
|
|
else
|
|
cmnd=$sslcommand
|
|
fi
|
|
ratelimit
|
|
debug echo \"Q\" \| $cmnd $tls_version
|
|
local tmp=$(echo "Q" | $cmnd $tls_version 1>/dev/stdout 2>/dev/null)
|
|
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "selected cipher is '$current_cipher'"
|
|
verbose "using protocol '$current_protocol'"
|
|
|
|
# collect certificate data
|
|
current_certificates=""
|
|
local certificate_count=$certs_found
|
|
debug "server presented $certificate_count certificates"
|
|
local i
|
|
for ((i=0; i<$certificate_count; i=i+1 )); do
|
|
|
|
# extract i'th certificate
|
|
local cert="${current_raw_certificates[$i]}"
|
|
# put the output to an array instead running awk '{print $1}'
|
|
local cksum=($(cksum <<<"$cert"))
|
|
# compare the values not just checksums so that eventual collision
|
|
# doesn't mess up results
|
|
if [[ ${known_certs[$cksum]} == $cert ]]; then
|
|
if [ -n "${current_certificates}" ]; then
|
|
current_certificates+=","
|
|
fi
|
|
current_certificates+="\"${cert_checksums[$cksum]}\""
|
|
continue
|
|
fi
|
|
|
|
# compute sha256 fingerprint of the certificate
|
|
local sha256sum=($(${OPENSSLBIN} x509 -outform DER\
|
|
<<<"$cert" 2>/dev/null |\
|
|
${OPENSSLBIN} dgst -sha256 -r 2>/dev/null))
|
|
|
|
# check if it is a CA certificate
|
|
local isCA="False"
|
|
if ${OPENSSLBIN} x509 -noout -text <<<"$cert" 2>/dev/null |\
|
|
grep 'CA:TRUE' >/dev/null; then
|
|
isCA="True"
|
|
fi
|
|
|
|
# build trust source for certificate verification
|
|
local trust_source=()
|
|
if [[ -n $CAPATH ]]; then
|
|
trust_source=("-CApath" "$CAPATH")
|
|
elif [[ -e $CACERTS ]]; then
|
|
trust_source=("-CAfile" "$CACERTS")
|
|
fi
|
|
|
|
# check if the certificate is actually trusted (server may present
|
|
# unrelated certificates that are not trusted (including self
|
|
# signed ones)
|
|
local saved="False"
|
|
if ${OPENSSLBIN} verify "${trust_source[@]}" \
|
|
-untrusted <(printf "%s" "${current_raw_certificates[@]}") <(echo "$cert") 2>/dev/null | \
|
|
grep ': OK$' >/dev/null; then
|
|
|
|
# if the certificate is an intermediate CA it may be useful
|
|
# for connecting to servers that are misconfigured so save it
|
|
if [[ -n $CAPATH ]] && [[ $SAVECA == "True" ]] && [[ $isCA == "True" ]]; then
|
|
if [[ ! -e "$CAPATH/${sha256sum}.pem" ]]; then
|
|
echo "$cert" > "$CAPATH/${sha256sum}.pem"
|
|
c_hash "$CAPATH" "${sha256sum}.pem"
|
|
fi
|
|
saved="True"
|
|
fi
|
|
fi
|
|
if [[ -n $SAVECRT ]] && [[ $saved == "False" ]]; then
|
|
if [[ ! -e $SAVECRT/${sha256sum}.pem ]]; then
|
|
echo "$cert" > "$SAVECRT/${sha256sum}.pem"
|
|
fi
|
|
fi
|
|
# save the sha sum for reporting
|
|
if [ -n "${current_certificates}" ]; then
|
|
current_certificates+=","
|
|
fi
|
|
current_certificates+="\"${sha256sum}\""
|
|
known_certs[$cksum]="$cert"
|
|
cert_checksums[$cksum]="$sha256sum"
|
|
done
|
|
debug "current_certificates: $current_certificates"
|
|
|
|
# parsing finished, report result
|
|
if [[ -z "$current_protocol" || "$current_cipher" == '(NONE)' ]]; then
|
|
# connection failed, try again with next TLS version
|
|
continue
|
|
else
|
|
verbose "connection successful; protocol: $current_protocol, cipher: $current_cipher, previous cipher: $previous_cipher"
|
|
fi
|
|
# handling of TLSv1.2 only cipher suites
|
|
if [ ! -z "$previous_cipher" ] && [ "$previous_cipher" != "$current_cipher" ] && [ "$current_cipher" != "0000" ]; then
|
|
unset protocols
|
|
fi
|
|
previous_cipher=$current_cipher
|
|
|
|
# connection succeeded, add TLS version to positive results
|
|
if [ -z "$protocols" ]; then
|
|
protocols=$current_protocol
|
|
else
|
|
protocols="$protocols,$current_protocol"
|
|
fi
|
|
cipher=$current_cipher
|
|
pfs=$current_pfs
|
|
[ -z $pfs ] && pfs="None"
|
|
pubkey=$current_pubkey
|
|
sigalg=$current_sigalg
|
|
trusted=$current_trusted
|
|
tickethint=$current_tickethint
|
|
ocspstaple=$current_ocspstaple
|
|
certificates="$current_certificates"
|
|
# grab the cipher and PFS key size
|
|
done
|
|
# if cipher is empty, that means none of the TLS version worked with
|
|
# the current cipher
|
|
if [ -z "$cipher" ]; then
|
|
verbose "handshake failed, no ciphersuite was returned"
|
|
result='ConnectionFailure'
|
|
return 2
|
|
|
|
# if cipher contains NONE, the cipher wasn't accepted
|
|
elif [ "$cipher" == '(NONE) ' ]; then
|
|
result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
|
|
verbose "handshake failed, server returned ciphersuite '$result'"
|
|
return 1
|
|
|
|
# the connection succeeded
|
|
else
|
|
current_curves="None"
|
|
# if pfs uses ECDH, test supported curves
|
|
if [[ $pfs =~ ECDH ]]; then
|
|
has_curves="True"
|
|
if [ $TEST_CURVES == "True" ]; then
|
|
test_curves
|
|
if [ "$ecc_ciphers" != "" ]; then
|
|
ecc_ciphers+=":"
|
|
fi
|
|
ecc_ciphers+="$cipher"
|
|
else
|
|
# resolve the openssl curve to the proper IANA name
|
|
current_curves="$(get_curve_name $(echo $pfs|cut -d ',' -f2))"
|
|
fi
|
|
fi
|
|
result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
|
|
verbose "handshake succeeded, server returned ciphersuite '$result'"
|
|
return 0
|
|
fi
|
|
}
|
|
|
|
# Calculate the average handshake time for a specific ciphersuite
|
|
bench_cipher() {
|
|
local ciphersuite="$1"
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
|
|
local t="$(date +%s%N)"
|
|
verbose "Benchmarking handshake on '$TARGET' with ciphersuite '$ciphersuite'"
|
|
for i in $(seq 1 $BENCHMARKITER); do
|
|
debug Connection $i
|
|
(echo "Q" | $sslcommand 2>/dev/null 1>/dev/null)
|
|
if [ $? -gt 0 ]; then
|
|
break
|
|
fi
|
|
done
|
|
# Time interval in nanoseconds
|
|
local t="$(($(date +%s%N) - t))"
|
|
verbose "Benchmarking done in $t nanoseconds"
|
|
# Microseconds
|
|
cipherbenchms="$((t/1000/$BENCHMARKITER))"
|
|
}
|
|
|
|
# Connect to the target and retrieve the chosen cipher
|
|
# recursively until the connection fails
|
|
get_cipher_pref() {
|
|
[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
|
|
local ciphersuite="$1"
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e $CACERTS ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
|
|
|
|
verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'"
|
|
test_cipher_on_target "$sslcommand"
|
|
local success=$?
|
|
# If the connection succeeded with the current cipher, benchmark and store
|
|
if [ $success -eq 0 ]; then
|
|
cipherspref=("${cipherspref[@]}" "$result")
|
|
ciphercertificates=("${ciphercertificates[@]}" "$certificates")
|
|
pciph=($result)
|
|
get_cipher_pref "!$pciph:$ciphersuite"
|
|
return 0
|
|
fi
|
|
}
|
|
|
|
display_results_in_terminal() {
|
|
# Display the results
|
|
ctr=1
|
|
local pubkey
|
|
local sigalg
|
|
local trusted
|
|
local tickethint
|
|
local ocspstaple
|
|
local curvesordering
|
|
local different=False
|
|
echo "Target: $TARGET"; echo
|
|
for cipher in "${cipherspref[@]}"; do
|
|
# get first in array
|
|
pciph=($cipher)
|
|
if [ $DOBENCHMARK -eq 1 ]; then
|
|
bench_cipher "$pciph"
|
|
r="$ctr $cipher $cipherbenchms"
|
|
else
|
|
r="$ctr $cipher"
|
|
fi
|
|
local cipher_data=($cipher)
|
|
if [ $ctr -eq 1 ]; then
|
|
pubkey="${cipher_data[2]}"
|
|
sigalg="${cipher_data[3]}"
|
|
trusted="${cipher_data[4]}"
|
|
tickethint="${cipher_data[5]}"
|
|
ocspstaple="${cipher_data[6]}"
|
|
if [[ $TEST_CURVES == "True" && "${cipher_data[9]}" != "" ]]; then
|
|
curvesordering="${cipher_data[9]}"
|
|
fi
|
|
else
|
|
if [ "$pubkey" != "${cipher_data[2]}" ]; then
|
|
different=True
|
|
fi
|
|
if [ "$sigalg" != "${cipher_data[3]}" ]; then
|
|
different=True
|
|
fi
|
|
if [ "$trusted" != "${cipher_data[4]}" ]; then
|
|
different=True
|
|
fi
|
|
if [ "$tickethint" != "${cipher_data[5]}" ]; then
|
|
different=True
|
|
fi
|
|
if [ "$ocspstaple" != "${cipher_data[6]}" ]; then
|
|
different=True
|
|
fi
|
|
if [[ "$curvesordering" == "" && "${cipher_data[9]}" != "" ]]; then
|
|
curvesordering="${cipher_data[9]}"
|
|
fi
|
|
if [[ "$curvesordering" != "" && "$curvesordering" != "${cipher_data[9]}" ]]; then
|
|
different=True
|
|
fi
|
|
fi
|
|
results=("${results[@]}" "$r")
|
|
ctr=$((ctr+1))
|
|
done
|
|
|
|
header="prio ciphersuite protocols"
|
|
if [ $different == "True" ]; then
|
|
header+=" pubkey_size signature_algoritm trusted ticket_hint ocsp_staple"
|
|
fi
|
|
header+=" pfs"
|
|
if [ $has_curves == "True" ]; then
|
|
header+=" curves"
|
|
if [[ $TEST_CURVES == "True" && $different == "True" ]]; then
|
|
header+=" curves_ordering"
|
|
fi
|
|
fi
|
|
if [ $DOBENCHMARK -eq 1 ]; then
|
|
header+=" avg_handshake_microsec"
|
|
fi
|
|
ctr=0
|
|
for result in "${results[@]}"; do
|
|
if [ $ctr -eq 0 ]; then
|
|
echo $header
|
|
ctr=$((ctr+1))
|
|
fi
|
|
if [ $different == "True" ]; then
|
|
echo $result|grep -v '(NONE)'
|
|
else
|
|
# prints priority, ciphersuite, protocols and pfs
|
|
awk '!/(NONE)/{print $1 " " $2 " " $3 " " $9 " " $10}' <<<"$result"
|
|
fi
|
|
done|column -t
|
|
echo
|
|
if [ $different != "True" ]; then
|
|
if [ "$trusted" == "True" ]; then
|
|
echo "Certificate: trusted, $pubkey bit, $sigalg signature"
|
|
else
|
|
echo "Certificate: UNTRUSTED, $pubkey bit, $sigalg signature"
|
|
fi
|
|
echo "TLS ticket lifetime hint: $tickethint"
|
|
fi
|
|
if [[ $ocspstaple == "True" ]]; then
|
|
echo "OCSP stapling: supported"
|
|
else
|
|
echo "OCSP stapling: not supported"
|
|
fi
|
|
if [[ $serverside == "True" ]]; then
|
|
echo "Cipher ordering: server"
|
|
else
|
|
echo "Cipher ordering: client"
|
|
fi
|
|
if [ $TEST_CURVES == "True" ]; then
|
|
echo "Curves ordering: $curvesordering"
|
|
echo "Curves fallback: $fallback_supported"
|
|
fi
|
|
}
|
|
|
|
display_results_in_json() {
|
|
# Display the results in json
|
|
ctr=0
|
|
echo -n "{\"target\":\"$TARGET\",\"utctimestamp\":\"$(date -u '+%FT%T.0Z')\",\"serverside\":\"${serverside}\",\"ciphersuite\": ["
|
|
for cipher in "${cipherspref[@]}"; do
|
|
local cipher_arr=($cipher)
|
|
[ $ctr -gt 0 ] && echo -n ','
|
|
echo -n "{\"cipher\":\"${cipher_arr[0]}\","
|
|
echo -n "\"protocols\":[\"${cipher_arr[1]//,/\",\"}\"],"
|
|
echo -n "\"pubkey\":[\"${cipher_arr[2]//,/\",\"}\"],"
|
|
echo -n "\"sigalg\":[\"${cipher_arr[3]//,/\",\"}\"],"
|
|
echo -n "\"trusted\":\"${cipher_arr[4]//,/\",\"}\","
|
|
if [[ -n $CAPATH ]]; then
|
|
echo -n "\"certificates\":[${ciphercertificates[$ctr]}],"
|
|
fi
|
|
echo -n "\"ticket_hint\":\"${cipher_arr[5]}\","
|
|
echo -n "\"ocsp_stapling\":\"${cipher_arr[6]}\","
|
|
pfs="${cipher_arr[7]}"
|
|
[ "$pfs" == "" ] && pfs="None"
|
|
echo -n "\"pfs\":\"$pfs\""
|
|
if [[ "${cipher_arr[0]}" =~ ECDH ]]; then
|
|
echo -n ","
|
|
echo -n "\"curves\":[\"${cipher_arr[8]//,/\",\"}\"]"
|
|
if [ $TEST_CURVES == "True" ]; then
|
|
echo -n ","
|
|
echo -n "\"curves_ordering\":\"${cipher_arr[9]}\""
|
|
fi
|
|
fi
|
|
echo -n "}"
|
|
ctr=$((ctr+1))
|
|
done
|
|
echo -n ']'
|
|
if [ $TEST_CURVES == "True" ]; then
|
|
echo -n ",\"curves_fallback\":\"$fallback_supported\""
|
|
fi
|
|
echo '}'
|
|
}
|
|
|
|
test_serverside_ordering() {
|
|
local ciphersuite=""
|
|
local prefered=""
|
|
# server supports only one cipher or no ciphers, so it effectively uses server side ordering...
|
|
if [[ ${#cipherspref[@]} -lt 2 ]]; then
|
|
serverside="True"
|
|
return 0
|
|
# server supports just two ciphers, so rotate them, that should be enough
|
|
elif [[ ${#cipherspref[@]} -eq 2 ]]; then
|
|
|
|
local cipher=(${cipherspref[1]})
|
|
prefered="$cipher"
|
|
ciphersuite=$cipher
|
|
|
|
cipher=(${cipherspref[0]})
|
|
ciphersuite+=":$cipher"
|
|
|
|
# server supports 3 or more ciphers, rotate all three. This is necessary because google does
|
|
# select first client provided cipher, if it is either CDHE-RSA-AES128-GCM-SHA256 or
|
|
# ECDHE-RSA-CHACHA20-POLY1305
|
|
else
|
|
local cipher=(${cipherspref[2]})
|
|
prefered="$cipher"
|
|
ciphersuite="$cipher"
|
|
|
|
cipher=(${cipherspref[1]})
|
|
ciphersuite+=":$cipher"
|
|
|
|
cipher=(${cipherspref[0]})
|
|
ciphersuite+=":$cipher"
|
|
fi
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
|
|
|
|
test_cipher_on_target "$sslcommand"
|
|
if [ $? -ne 0 ]; then
|
|
serverside="True"
|
|
else
|
|
local selected=($result)
|
|
if [[ $selected == $prefered ]]; then
|
|
serverside="False"
|
|
else
|
|
serverside="True"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
test_curves() {
|
|
# "True" if server supports ciphers that don't use ECC at a lower priority
|
|
local fallback_available="False"
|
|
|
|
# return variable: list of curves supported by server, in order
|
|
current_curves=""
|
|
# return variable: check if server uses server side or client side ordering
|
|
# for curves
|
|
curves_ordering="server"
|
|
|
|
local curves=(${CURVES[*]})
|
|
|
|
OLDIFS="$IFS"
|
|
IFS=':'
|
|
verbose "Will test following curves: ${curves[*]}"
|
|
IFS="$OLDIFS"
|
|
|
|
# prepare the ssl command we'll be using
|
|
local sslcommand=""
|
|
sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $current_cipher"
|
|
# force the TLS to send a TLS1.0 client hello at least, as with SSLv2
|
|
# ciphers present it will try to send a SSLv2 compatible client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
|
|
#
|
|
# here we use the same logic as with detecting cipher suites: first
|
|
# advertise all curves as supported, then remove curves one by one until we
|
|
# either get a fallback to a non ECC cipher, we run of curves or server
|
|
# tries to negotiate a curve we didn't advertise
|
|
#
|
|
while [[ ${#curves[@]} -gt 0 ]]; do
|
|
OLDIFS="$IFS"
|
|
IFS=':'
|
|
local test_curves="${curves[*]}"
|
|
IFS="$OLDIFS"
|
|
verbose "Testing $test_curves with command $sslcommand"
|
|
|
|
ratelimit
|
|
local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
|
break
|
|
else
|
|
# server accepted connection
|
|
local ephem_data=(${current_pfs//,/ })
|
|
local cname=""
|
|
if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
|
if [ "$current_curves" != "" ]; then
|
|
current_curves+=","
|
|
fi
|
|
cname="$(get_curve_name ${ephem_data[1]})"
|
|
verbose "Server selected ${ephem_data[1]}, a.k.a $cname"
|
|
current_curves+="$cname"
|
|
fi
|
|
for id in "${!curves[@]}"; do
|
|
if [ "$cname" == ${curves[$id]} ]; then
|
|
# we know it's supported, remove it from set of offered ones
|
|
unset curves[$id]
|
|
break
|
|
fi
|
|
done
|
|
fi
|
|
[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
|
|
done
|
|
|
|
# don't penalize servers that will negotiate all curves we know of...
|
|
if [[ ${#curves[@]} -eq 0 ]]; then
|
|
fallback_supported="unknown"
|
|
fi
|
|
|
|
#
|
|
# check if curves ordering is server of client side
|
|
#
|
|
|
|
local tmp_curves=(${current_curves//,/ })
|
|
verbose "Server supported curves: ${tmp_curves[@]}"
|
|
|
|
# server supports just one or none, so it effectively uses server side
|
|
# ordering (as it dictates what curves client must support)
|
|
if [ ${#tmp_curves[@]} -lt 2 ]; then
|
|
curves_ordering="server"
|
|
else
|
|
# server supports at least 2 curves, rotate their order, see if
|
|
# selected changes
|
|
test_curves=""
|
|
most_wanted="${tmp_curves[${#tmp_curves[@]}-1]}"
|
|
for (( i=${#tmp_curves[@]}-1; i>0; i--)); do
|
|
test_curves+="${tmp_curves[$i]}:"
|
|
done
|
|
test_curves+="${tmp_curves[0]}"
|
|
|
|
verbose "Testing ordering with $sslcommand -curves $test_curves"
|
|
ratelimit
|
|
local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
|
fallback_supported="order-specific"
|
|
verbose "Server aborted connection"
|
|
else
|
|
local ephem_data=(${current_pfs//,/ })
|
|
verbose "Server selected $current_cipher with $current_pfs"
|
|
verbose "ephem_data: ${ephem_data[@]}"
|
|
|
|
if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
|
verbose "Server did select ${ephem_data[1]} curve"
|
|
curves_ordering="inconclusive-${ephem_data[1]}"
|
|
local cname="$(get_curve_name ${ephem_data[1]})"
|
|
if [ "$cname" == "$most_wanted" ]; then
|
|
curves_ordering="client"
|
|
else
|
|
curves_ordering="server"
|
|
fi
|
|
else
|
|
# some servers downgrade to non ECDH when curve order is changed
|
|
curves_ordering="inconclusive-noecc"
|
|
fi
|
|
fi
|
|
fi
|
|
}
|
|
|
|
test_curves_fallback() {
|
|
# "True" if server supports ciphers that don't use ECC at a lower priority
|
|
local fallback_available="False"
|
|
# return variable: whatever a server will fall back to non ECC suite when
|
|
# client doesn't advertise support for curves the server needs
|
|
fallback_supported="unknown"
|
|
|
|
if [ "$ecc_ciphers" == "" ]; then
|
|
verbose "No ECC cipher found, can't test curve fallback"
|
|
return
|
|
fi
|
|
|
|
# prepare the ssl command we'll be using
|
|
local sslcommand=""
|
|
sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ecc_ciphers"
|
|
# force the TLS to send a TLS1.0 client hello at least, as with SSLv2
|
|
# ciphers present it will try to send a SSLv2 compatible client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
|
|
#
|
|
# here we use the same logic as with detecting cipher suites: first
|
|
# advertise all curves as supported, then remove curves one by one until we
|
|
# either get a fallback to a non ECC cipher, we run of curves or server
|
|
# tries to negotiate a curve we didn't advertise
|
|
#
|
|
local curves=(${CURVES[*]})
|
|
while [[ ${#curves[@]} -gt 0 ]]; do
|
|
OLDIFS="$IFS"
|
|
IFS=':'
|
|
local test_curves="${curves[*]}"
|
|
IFS="$OLDIFS"
|
|
verbose "Testing $sslcommand -curves $test_curves"
|
|
|
|
ratelimit
|
|
local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
|
verbose "Curve fallback failed, server refused connection"
|
|
fallback_supported="False"
|
|
break
|
|
else
|
|
# server accepted connection
|
|
local ephem_data=(${current_pfs//,/ })
|
|
|
|
if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
|
# we got an ecc connection, remove the curve from the list of testable curves
|
|
local cname="$(get_curve_name ${ephem_data[1]})"
|
|
verbose "Server selected curve $cname"
|
|
for id in "${!curves[@]}"; do
|
|
if [ "${curves[id]}" == "$cname" ]; then
|
|
unset curves[$id]
|
|
break
|
|
fi
|
|
done
|
|
else
|
|
verbose "Server fell back to $current_cipher"
|
|
# ok, we got a fallback
|
|
fallback_supported="True"
|
|
break
|
|
fi
|
|
fi
|
|
done
|
|
}
|
|
|
|
# If no options are given, give usage information and exit (with error code)
|
|
if [ $# -eq 0 ]; then
|
|
usage;
|
|
exit 1
|
|
fi
|
|
|
|
# UNKNOWNOPTIONS=""
|
|
while :
|
|
do
|
|
case $1 in
|
|
-h | --help | -\?)
|
|
usage
|
|
exit 0 # This is not an error, User asked help. Don't do "exit 1"
|
|
;;
|
|
-o | --openssl)
|
|
OPENSSLBIN=$2 # You might want to check if you really got FILE
|
|
shift 2
|
|
;;
|
|
-a | --allciphers)
|
|
ALLCIPHERS=1
|
|
shift
|
|
;;
|
|
-v | --verbose)
|
|
# Each instance of -v adds 1 to verbosity
|
|
VERBOSE=$((VERBOSE+1))
|
|
shift
|
|
;;
|
|
-j | -json | --json | --JSON)
|
|
OUTPUTFORMAT="json"
|
|
shift
|
|
;;
|
|
-b | --benchmark)
|
|
DOBENCHMARK=1
|
|
shift
|
|
;;
|
|
-D | --debug)
|
|
DEBUG=1
|
|
shift
|
|
;;
|
|
-d | --delay)
|
|
DELAY=$2
|
|
shift 2
|
|
;;
|
|
--capath)
|
|
CAPATH="$2"
|
|
shift 2
|
|
;;
|
|
--saveca)
|
|
SAVECA="True"
|
|
shift 1
|
|
;;
|
|
--savecrt)
|
|
SAVECRT="$2"
|
|
shift 2
|
|
;;
|
|
--curves)
|
|
TEST_CURVES="True"
|
|
shift 1
|
|
;;
|
|
--no-curves)
|
|
TEST_CURVES="False"
|
|
shift 1
|
|
;;
|
|
--) # End of all options
|
|
shift
|
|
break
|
|
;;
|
|
# -*)
|
|
# UNKNOWNOPTIONS=$((UNKNOWNOPTIONS+$1))
|
|
# # echo "WARN: Unknown option (ignored): $1" >&2
|
|
# shift
|
|
# ;;
|
|
*) # no more options we understand.
|
|
break
|
|
;;
|
|
esac
|
|
done
|
|
|
|
# echo parameters left: $@
|
|
|
|
TEMPTARGET=$(sed -e 's/^.* //'<<<"${@}")
|
|
HOST=$(sed -e 's/:.*//'<<<"${TEMPTARGET}")
|
|
PORT=$(sed -e 's/.*://'<<<"${TEMPTARGET}")
|
|
|
|
# Default to https if no port given
|
|
if [ "$HOST" = "$PORT" ]; then
|
|
PORT=443
|
|
fi
|
|
|
|
debug "host: $HOST"
|
|
debug "Port: $PORT"
|
|
|
|
TARGET=$HOST:$PORT
|
|
debug "target: $TARGET"
|
|
|
|
# test our openssl is usable
|
|
if [ ! -x $OPENSSLBIN ]; then
|
|
OPENSSLBIN=$(which openssl)
|
|
if [ "$OUTPUTFORMAT" == "terminal" ]; then
|
|
echo "custom openssl not executable, falling back to system one from $OPENSSLBIN"
|
|
fi
|
|
fi
|
|
|
|
if [ $TEST_CURVES == "True" ]; then
|
|
if [ ! -z "$($OPENSSLBIN s_client -curves 2>&1|head -1|grep 'unknown option')" ]; then
|
|
echo "curves testing not available with your version of openssl, disabling it"
|
|
TEST_CURVES="False"
|
|
fi
|
|
fi
|
|
|
|
if [ $VERBOSE != 0 ] ; then
|
|
[ -n "$CACERTS" ] && echo "Using trust anchors from $CACERTS"
|
|
echo "Loading $($OPENSSLBIN ciphers -v $CIPHERSUITE 2>/dev/null|grep Kx|wc -l) ciphersuites from $(echo -n $($OPENSSLBIN version 2>/dev/null))"
|
|
$OPENSSLBIN ciphers ALL 2>/dev/null
|
|
fi
|
|
|
|
SCLIENTARGS=$(sed -e s,${TEMPTARGET},,<<<"${@}")
|
|
debug "sclientargs: $SCLIENTARGS"
|
|
|
|
|
|
cipherspref=();
|
|
ciphercertificates=()
|
|
results=()
|
|
|
|
# Call to the recursive loop that retrieves the cipher preferences
|
|
get_cipher_pref $CIPHERSUITE
|
|
|
|
test_serverside_ordering
|
|
|
|
if [[ $TEST_CURVES == "True" ]]; then
|
|
test_curves_fallback
|
|
fi
|
|
|
|
if [ "$OUTPUTFORMAT" == "json" ]; then
|
|
display_results_in_json
|
|
else
|
|
echo
|
|
display_results_in_terminal
|
|
fi
|
|
|
|
# If asked, test every single cipher individually
|
|
if [ $ALLCIPHERS -gt 0 ]; then
|
|
echo; echo "All accepted ciphersuites"
|
|
for c in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort|uniq); do
|
|
r="fail"
|
|
osslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $c"
|
|
test_cipher_on_target "$osslcommand"
|
|
if [ $? -eq 0 ]; then
|
|
r="pass"
|
|
fi
|
|
echo "$c $r"|awk '{printf "%-35s %s\n",$1,$2}'
|
|
done
|
|
fi
|