mirror of
https://github.com/mozilla/cipherscan.git
synced 2024-11-05 07:23:42 +01:00
1078 lines
35 KiB
Bash
Executable File
1078 lines
35 KiB
Bash
Executable File
#!/usr/bin/env bash
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# Authors: Julien Vehent [:ulfr] - 201{3,4}
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# Hubert Kario - 2014
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# vim: autoindent tabstop=4 shiftwidth=4 expandtab softtabstop=4 filetype=sh
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DOBENCHMARK=0
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BENCHMARKITER=30
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REALPATH=$(dirname $0)
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# make sure this doesn't error out when readlink -f isn't available (OSX)
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readlink -f $0 &>/dev/null && REALPATH=$(dirname $(readlink -f $0))
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OPENSSLBIN="${REALPATH}/openssl"
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if [ "$(uname -s)" == "Darwin" ]; then
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OPENSSLBIN="${REALPATH}/openssl-darwin64"
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fi
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# cipherscan requires bash4, which doesn't come by default in OSX
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if [ ${BASH_VERSINFO[0]} -lt 4 ]; then
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echo "Bash version 4 is required to run cipherscan."
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echo "Please upgrade your version of bash (ex: brew install bash)."
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exit 1
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fi
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# test that timeout or gtimeout (darwin) are present
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TIMEOUTBIN="$(which timeout)"
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if [ "$TIMEOUTBIN" == "" ]; then
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TIMEOUTBIN="$(which gtimeout)"
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if [ "$TIMEOUTBIN" == "" ]; then
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echo "neither timeout nor gtimeout are present. install coreutils with {apt-get,yum,brew} install coreutils"
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exit 1
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fi
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fi
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# find a list of trusted CAs on the local system, or use the provided list
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if [ -z "$CACERTS" ]; then
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for f in /etc/pki/tls/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt; do
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if [ -e "$f" ]; then
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CACERTS="$f"
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break
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fi
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done
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fi
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if [ ! -e "$CACERTS" ]; then
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CACERTS="$(dirname $0)/ca-bundle.crt"
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fi
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# RSA ciphers are put at the end to force Google servers to accept ECDSA ciphers
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# (probably a result of a workaround for the bug in Apple implementation of ECDSA)
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CIPHERSUITE="ALL:COMPLEMENTOFALL:+aRSA"
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DEBUG=0
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VERBOSE=0
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DELAY=0
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ALLCIPHERS=0
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OUTPUTFORMAT="terminal"
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TIMEOUT=30
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# place where to put the found intermediate CA certificates and where
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# trust anchors are stored
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CAPATH=""
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SAVECRT=""
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TEST_CURVES="False"
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has_curves="False"
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# openssl formated list of curves that will cause server to select ECC suite
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ecc_ciphers=""
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unset known_certs
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declare -A known_certs
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unset cert_checksums
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declare -A cert_checksums
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# because running external commands like sleep incurs a fork penalty, we
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# first check if it is necessary
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ratelimit() {
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if [[ $DELAY != "0" ]]; then
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sleep $DELAY
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fi
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}
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usage() {
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echo -e "usage: $0 [-a|--allciphers] [-b|--benchmark] [--capath directory]
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[--saveca] [--savecrt directory] [-d|--delay seconds] [-D|--debug] [-j|--json]
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[-v|--verbose] [-o|--openssl file] [openssl s_client args] <target:port>
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usage: $0 -h|--help
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$0 attempts to connect to a target site using all the ciphersuites it knows.
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Julien Vehent [:ulfr] - https://github.com/jvehent/cipherscan
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Port defaults to 443
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example: $ $0 www.google.com:443
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Use one of the options below:
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-a | --allciphers Test all known ciphers individually at the end.
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-b | --benchmark Activate benchmark mode.
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--capath use CAs from directory (must be in OpenSSL CAdir format)
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--saveca save intermediate certificates in CA directory
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-d | --delay Pause for n seconds between connections
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-D | --debug Output ALL the information.
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-h | --help Shows this help text.
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-j | --json Output results in JSON format.
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-o | --openssl path/to/your/openssl binary you want to use.
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--savecrt path where to save untrusted and leaf certificates
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--[no-]curves test ECC curves supported by server (req. OpenSSL 1.0.2)
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-v | --verbose Increase verbosity.
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The rest of the arguments will be interpreted as openssl s_client argument.
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This enables checking smtp/imap/pop3/ftp/xmpp via -starttls
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EXAMPLES: $0 -starttls xmpp jabber.ccc.de:5222
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"
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}
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verbose() {
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if [ $VERBOSE != 0 ]; then
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echo "$@" >&2
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fi
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}
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debug(){
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if [ $DEBUG == 1 ]; then
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echo Debug: "$@" >&2
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set -evx
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fi
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}
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# obtain an array of curves supported by openssl
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CURVES=(sect163k1 # K-163
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sect163r1
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sect163r2 # B-163
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sect193r1
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sect193r2
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sect233k1 # K-233
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sect233r1 # B-233
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sect239k1
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sect283k1 # K-283
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sect283r1 # B-283
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sect409k1 # K-409
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sect409r1 # B-409
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sect571k1 # K-571
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sect571r1 # B-571
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secp160k1
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secp160r1
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secp160r2
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secp192k1
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prime192v1 # P-192 secp192r1
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secp224k1
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secp224r1 # P-224
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secp256k1
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prime256v1 # P-256 secp256r1
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secp384r1 # P-384
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secp521r1 # P-521
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brainpoolP256r1
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brainpoolP384r1
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brainpoolP512r1)
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# many curves have alternative names, this array provides a mapping to find the IANA
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# name of a curve using its alias
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CURVES_MAP=("sect163k1 K-163"
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"sect163r2 B-163"
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"sect233k1 K-233"
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"sect233r1 B-233"
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"sect283k1 K-283"
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"sect283r1 B-283"
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"sect409k1 K-409"
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"sect409r1 B-409"
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"sect571k1 K-571"
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"sect571r1 B-571"
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"prime192v1 P-192 secp192r1"
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"secp224r1 P-224"
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"prime256v1 P-256 secp256r1"
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"secp384r1 P-384"
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"secp521r1 P-521")
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get_curve_name() {
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local identifier=$1
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for c in "${CURVES_MAP[@]}"; do
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if [[ "$c" =~ $identifier ]]; then
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verbose "$c matches identifier $identifier"
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local map=(${c// / })
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echo ${map[0]}
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return
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fi
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done
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echo $identifier
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return
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}
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c_hash() {
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local h=$(${OPENSSLBIN} x509 -hash -noout -in "$1/$2" 2>/dev/null)
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for ((num=0; num<=100; num++)) ; do
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if [[ $1/${h}.${num} -ef $2 ]]; then
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# file already linked, ignore
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break
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fi
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if [[ ! -e $1/${h}.${num} ]]; then
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# file doesn't exist, create a link
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pushd "$1" > /dev/null
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ln -s "$2" "${h}.${num}"
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popd > /dev/null
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break
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fi
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done
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}
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parse_openssl_output() {
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# clear variables in case matching doesn't hit them
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current_ocspstaple="False"
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current_cipher=""
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current_pfs=""
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current_protocol=""
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current_tickethint="None"
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current_pubkey=0
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current_trusted="False"
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current_sigalg="None"
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certs_found=0
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current_raw_certificates=()
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while read line; do
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# check if there isn't OCSP response data (response and responder cert)
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if [[ $line =~ ^====================================== ]]; then
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while read data; do
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# check if there is a OCSP response in output
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if [[ $data =~ OCSP\ Response\ Data ]]; then
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current_ocspstaple="True"
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continue
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fi
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# skip all data from a OCSP response
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if [[ $data =~ ^====================================== ]]; then
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break
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fi
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done
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continue
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fi
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# extract selected cipher
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if [[ $line =~ New,\ ]]; then
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local match=($line)
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current_cipher="${match[4]}"
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continue
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fi
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# extract data about selected temporary key
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if [[ $line =~ Server\ Temp\ Key ]]; then
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local match=($line)
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current_pfs="${match[3]}${match[4]}${match[5]}${match[6]}"
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continue
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fi
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# extract used protocol
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if [[ $line =~ ^Protocol\ + ]]; then
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local match=($line)
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current_protocol="${match[2]}"
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continue
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fi
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# extract session ticket hint
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if [[ $line =~ ticket\ lifetime\ hint ]]; then
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local match=($line)
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current_tickethint="${match[5]}"
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continue
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fi
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# extract size of server public key
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if [[ $line =~ Server\ public\ key\ is\ ]]; then
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local match=($line)
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current_pubkey="${match[4]}"
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continue
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fi
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# check if connection used trused certificate
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if [[ $line =~ Verify\ return\ code:\ 0 ]]; then
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current_trusted="True"
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continue
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fi
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# extract certificates
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if [[ $line =~ -----BEGIN\ CERTIFICATE----- ]]; then
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current_raw_certificates[$certs_found]="$line"$'\n'
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while read data; do
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current_raw_certificates[$certs_found]+="$data"$'\n'
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if [[ $data =~ -----END\ CERTIFICATE----- ]]; then
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break
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fi
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done
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certs_found=$((certs_found+1))
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continue
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fi
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done
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# if we found any certs in output, process the first one and extract
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# the signature algorithm on it (it's the server's certificate)
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if [[ $certs_found -gt 0 ]]; then
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local ossl_out=$(${OPENSSLBIN} x509 -noout -text 2>/dev/null <<<"${current_raw_certificates[0]}")
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while read data; do
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if [[ $data =~ Signature\ Algorithm ]]; then
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local match=($data)
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current_sigalg="${match[2]}"
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fi
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done <<<"$ossl_out"
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fi
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}
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# Connect to a target host with the selected ciphersuite
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test_cipher_on_target() {
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local sslcommand=$@
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cipher=""
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local cmnd=""
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protocols=""
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pfs=""
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previous_cipher=""
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certificates=""
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for tls_version in "-ssl2" "-ssl3" "-tls1" "-tls1_1" "-tls1_2"
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do
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# sslv2 client hello doesn't support SNI extension
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# in SSLv3 mode OpenSSL just ignores the setting so it's ok
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# -status exception is ignored in SSLv2, go figure
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if [ "$tls_version" == "-ssl2" ]; then
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if [[ "$sslcommand" =~ (.*)(-servername\ [^ ]*)(.*) ]]; then
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cmnd="${BASH_REMATCH[1]} ${BASH_REMATCH[3]}"
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else
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cmnd="$sslcommand"
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fi
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else
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cmnd=$sslcommand
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fi
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ratelimit
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debug echo \"Q\" \| $cmnd $tls_version
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local tmp=$(echo "Q" | $cmnd $tls_version 1>/dev/stdout 2>/dev/null)
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parse_openssl_output <<<"$tmp"
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verbose "selected cipher is '$current_cipher'"
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verbose "using protocol '$current_protocol'"
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# collect certificate data
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current_certificates=""
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local certificate_count=$certs_found
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debug "server presented $certificate_count certificates"
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local i
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for ((i=0; i<$certificate_count; i=i+1 )); do
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# extract i'th certificate
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local cert="${current_raw_certificates[$i]}"
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# put the output to an array instead running awk '{print $1}'
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local cksum=($(cksum <<<"$cert"))
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# compare the values not just checksums so that eventual collision
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# doesn't mess up results
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if [[ ${known_certs[$cksum]} == $cert ]]; then
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if [ -n "${current_certificates}" ]; then
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current_certificates+=","
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fi
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current_certificates+="\"${cert_checksums[$cksum]}\""
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continue
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fi
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# compute sha256 fingerprint of the certificate
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local sha256sum=($(${OPENSSLBIN} x509 -outform DER\
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<<<"$cert" 2>/dev/null |\
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${OPENSSLBIN} dgst -sha256 -r 2>/dev/null))
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# check if it is a CA certificate
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local isCA="False"
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if ${OPENSSLBIN} x509 -noout -text <<<"$cert" 2>/dev/null |\
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grep 'CA:TRUE' >/dev/null; then
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isCA="True"
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fi
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# build trust source for certificate verification
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local trust_source=()
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if [[ -n $CAPATH ]]; then
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trust_source=("-CApath" "$CAPATH")
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elif [[ -e $CACERTS ]]; then
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trust_source=("-CAfile" "$CACERTS")
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fi
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# check if the certificate is actually trusted (server may present
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# unrelated certificates that are not trusted (including self
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# signed ones)
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local saved="False"
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if ${OPENSSLBIN} verify "${trust_source[@]}" \
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-untrusted <(printf "%s" "${current_raw_certificates[@]}") <(echo "$cert") 2>/dev/null | \
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grep ': OK$' >/dev/null; then
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# if the certificate is an intermediate CA it may be useful
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# for connecting to servers that are misconfigured so save it
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if [[ -n $CAPATH ]] && [[ $SAVECA == "True" ]] && [[ $isCA == "True" ]]; then
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if [[ ! -e "$CAPATH/${sha256sum}.pem" ]]; then
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echo "$cert" > "$CAPATH/${sha256sum}.pem"
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c_hash "$CAPATH" "${sha256sum}.pem"
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fi
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saved="True"
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fi
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fi
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if [[ -n $SAVECRT ]] && [[ $saved == "False" ]]; then
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if [[ ! -e $SAVECRT/${sha256sum}.pem ]]; then
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echo "$cert" > "$SAVECRT/${sha256sum}.pem"
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fi
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fi
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# save the sha sum for reporting
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if [ -n "${current_certificates}" ]; then
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current_certificates+=","
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fi
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current_certificates+="\"${sha256sum}\""
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known_certs[$cksum]="$cert"
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cert_checksums[$cksum]="$sha256sum"
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done
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debug "current_certificates: $current_certificates"
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# parsing finished, report result
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if [[ -z "$current_protocol" || "$current_cipher" == '(NONE)' ]]; then
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# connection failed, try again with next TLS version
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continue
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else
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verbose "connection successful; protocol: $current_protocol, cipher: $current_cipher, previous cipher: $previous_cipher"
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fi
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# handling of TLSv1.2 only cipher suites
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if [ ! -z "$previous_cipher" ] && [ "$previous_cipher" != "$current_cipher" ] && [ "$current_cipher" != "0000" ]; then
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unset protocols
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fi
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previous_cipher=$current_cipher
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# connection succeeded, add TLS version to positive results
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if [ -z "$protocols" ]; then
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protocols=$current_protocol
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else
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protocols="$protocols,$current_protocol"
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fi
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cipher=$current_cipher
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pfs=$current_pfs
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[ -z $pfs ] && pfs="None"
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pubkey=$current_pubkey
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sigalg=$current_sigalg
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trusted=$current_trusted
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tickethint=$current_tickethint
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ocspstaple=$current_ocspstaple
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certificates="$current_certificates"
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# grab the cipher and PFS key size
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done
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# if cipher is empty, that means none of the TLS version worked with
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# the current cipher
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if [ -z "$cipher" ]; then
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verbose "handshake failed, no ciphersuite was returned"
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result='ConnectionFailure'
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return 2
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# if cipher contains NONE, the cipher wasn't accepted
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elif [ "$cipher" == '(NONE) ' ]; then
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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verbose "handshake failed, server returned ciphersuite '$result'"
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return 1
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# the connection succeeded
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else
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current_curves="None"
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# if pfs uses ECDH, test supported curves
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if [[ $pfs =~ ECDH ]]; then
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has_curves="True"
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if [ $TEST_CURVES == "True" ]; then
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test_curves
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if [ "$ecc_ciphers" != "" ]; then
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ecc_ciphers+=":"
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fi
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ecc_ciphers+="$cipher"
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else
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# resolve the openssl curve to the proper IANA name
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current_curves="$(get_curve_name $(echo $pfs|cut -d ',' -f2))"
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fi
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fi
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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verbose "handshake succeeded, server returned ciphersuite '$result'"
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return 0
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fi
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}
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# Calculate the average handshake time for a specific ciphersuite
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bench_cipher() {
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local ciphersuite="$1"
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local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
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local t="$(date +%s%N)"
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verbose "Benchmarking handshake on '$TARGET' with ciphersuite '$ciphersuite'"
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for i in $(seq 1 $BENCHMARKITER); do
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debug Connection $i
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(echo "Q" | $sslcommand 2>/dev/null 1>/dev/null)
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if [ $? -gt 0 ]; then
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break
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fi
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done
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# Time interval in nanoseconds
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local t="$(($(date +%s%N) - t))"
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verbose "Benchmarking done in $t nanoseconds"
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# Microseconds
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cipherbenchms="$((t/1000/$BENCHMARKITER))"
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}
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# Connect to the target and retrieve the chosen cipher
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# recursively until the connection fails
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get_cipher_pref() {
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[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
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local ciphersuite="$1"
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|
|
local sslcommand="$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
|