mirror of
https://github.com/mozilla/cipherscan.git
synced 2024-11-05 07:23:42 +01:00
2206 lines
75 KiB
Bash
Executable File
2206 lines
75 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, 2015
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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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# 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." 1>&2
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echo "Please upgrade your version of bash (ex: brew install bash)." 1>&2
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exit 1
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fi
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if [[ -n $NOAUTODETECT ]]; then
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if ! [[ -f $TIMEOUTBIN && -x $TIMEOUTBIN ]]; then
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echo "NOAUTODETECT set, but TIMEOUTBIN is not an executable file" 1>&2
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exit 1
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fi
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if ! [[ -f $OPENSSLBIN && -x $OPENSSLBIN ]]; then
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echo "NOAUTODETECT set, but OPENSSLBIN is not an executable file" 1>&2
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exit 1
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fi
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else
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case "$(uname -s)" in
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Darwin)
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opensslbin_name="openssl-darwin64"
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READLINKBIN=$(which greadlink 2>/dev/null)
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if [[ -z $READLINKBIN ]]; then
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echo "greadlink not found. (try: brew install coreutils)" 1>&2
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exit 1
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fi
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TIMEOUTBIN=$(which gtimeout 2>/dev/null)
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if [[ -z $TIMEOUTBIN ]]; then
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echo "gtimeout not found. (try: brew install coreutils)" 1>&2
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exit 1
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fi
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;;
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*)
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opensslbin_name="openssl"
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# test that readlink or greadlink (darwin) are present
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READLINKBIN="$(which readlink)"
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if [[ -z $READLINKBIN ]]; then
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READLINKBIN="$(which greadlink)"
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if [[ -z $READLINKBIN ]]; then
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echo "neither readlink nor greadlink are present. install coreutils with {apt-get,yum,brew} install coreutils" 1>&2
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exit 1
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fi
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fi
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# test that timeout or gtimeout (darwin) are present
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TIMEOUTBIN="$(which timeout)"
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if [[ -z $TIMEOUTBIN ]]; then
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TIMEOUTBIN="$(which gtimeout)"
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if [[ -z $TIMEOUTBIN ]]; then
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echo "neither timeout nor gtimeout are present. install coreutils with {apt-get,yum,brew} install coreutils" 1>&2
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exit 1
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fi
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fi
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# Check for busybox, which has different arguments
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TIMEOUTOUTPUT="$($TIMEOUTBIN --help 2>&1)"
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if [[ "$TIMEOUTOUTPUT" =~ BusyBox ]]; then
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TIMEOUTBIN="$TIMEOUTBIN -t"
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fi
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;;
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esac
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fi
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DIRNAMEPATH=$(dirname "$0")
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join_array_by_char() {
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# Two or less parameters (join + 0 or 1 value), then no need to set IFS because no join occurs.
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if (( $# >= 3 )); then
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# Three or more parameters (join + 2 values), then we need to set IFS for the join.
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local IFS=$1
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fi
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# Discard the join string (usually ':', could be others).
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shift
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# Store the joined string in the result.
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joined_array="$*"
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}
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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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# some servers are intolerant to large client hello, try a shorter list of
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# ciphers with them
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SHORTCIPHERSUITE=(
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'ECDHE-ECDSA-AES128-GCM-SHA256'
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'ECDHE-RSA-AES128-GCM-SHA256'
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'ECDHE-RSA-AES256-GCM-SHA384'
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'ECDHE-ECDSA-AES256-SHA'
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'ECDHE-ECDSA-AES128-SHA'
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'ECDHE-RSA-AES128-SHA'
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'ECDHE-RSA-AES256-SHA'
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'ECDHE-RSA-DES-CBC3-SHA'
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'ECDHE-ECDSA-RC4-SHA'
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'ECDHE-RSA-RC4-SHA'
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'DHE-RSA-AES128-SHA'
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'DHE-DSS-AES128-SHA'
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'DHE-RSA-CAMELLIA128-SHA'
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'DHE-RSA-AES256-SHA'
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'DHE-DSS-AES256-SHA'
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'DHE-RSA-CAMELLIA256-SHA'
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'EDH-RSA-DES-CBC3-SHA'
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'AES128-SHA'
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'CAMELLIA128-SHA'
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'AES256-SHA'
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'CAMELLIA256-SHA'
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'DES-CBC3-SHA'
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'RC4-SHA'
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'RC4-MD5'
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)
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join_array_by_char ':' "${SHORTCIPHERSUITE[@]}"
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SHORTCIPHERSUITESTRING="$joined_array"
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# as some servers are intolerant to large client hello's (or ones that have
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# RC4 ciphers below position 64), use the following for cipher testing in case
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# of problems
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FALLBACKCIPHERSUITE=(
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'ECDHE-RSA-AES128-GCM-SHA256'
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'ECDHE-RSA-AES128-SHA256'
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'ECDHE-RSA-AES128-SHA'
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'ECDHE-RSA-DES-CBC3-SHA'
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'ECDHE-RSA-RC4-SHA'
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'DHE-RSA-AES128-SHA'
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'DHE-DSS-AES128-SHA'
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'DHE-RSA-CAMELLIA128-SHA'
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'DHE-RSA-AES256-SHA'
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'DHE-DSS-AES256-SHA'
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'DHE-RSA-CAMELLIA256-SHA'
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'EDH-RSA-DES-CBC3-SHA'
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'AES128-SHA'
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'CAMELLIA128-SHA'
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'AES256-SHA'
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'CAMELLIA256-SHA'
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'DES-CBC3-SHA'
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'RC4-SHA'
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'RC4-MD5'
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'SEED-SHA'
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'IDEA-CBC-SHA'
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'IDEA-CBC-MD5'
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'RC2-CBC-MD5'
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'DES-CBC3-MD5'
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'EXP1024-DHE-DSS-DES-CBC-SHA'
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'EDH-RSA-DES-CBC-SHA'
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'EXP1024-DES-CBC-SHA'
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'DES-CBC-MD5'
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'EXP1024-RC4-SHA'
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'EXP-EDH-RSA-DES-CBC-SHA'
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'EXP-DES-CBC-SHA'
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'EXP-RC2-CBC-MD5'
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'EXP-RC4-MD5'
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)
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join_array_by_char ':' "${FALLBACKCIPHERSUITE[@]}"
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FALLBACKCIPHERSUITESTRING="$joined_array"
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DEBUG=0
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VERBOSE=0
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DELAY=0
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ALLCIPHERS=""
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OUTPUTFORMAT="terminal"
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TIMEOUT=30
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USECOLORS="auto"
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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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SAVECRT=""
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TEST_CURVES="True"
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has_curves="False"
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TEST_TOLERANCE="True"
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SNI="True"
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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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TEST_KEX_SIGALG="False"
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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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# array with results of tolerance scans (TLS version, extensions, etc.)
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declare -A tls_tolerance
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# array with info on type of fallback on unknown sigalgs (or required ones)
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declare -A sigalgs_fallback
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# array with preferred sigalgs for aRSA and aECDSA ciphers
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declare -a sigalgs_preferred_rsa
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declare -a sigalgs_preferred_ecdsa
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renegotiation=""
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compression=""
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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 known
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to OpenSSL it is using.
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Julien Vehent [:ulfr] and others (see README.md)
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https://github.com/jvehent/cipherscan
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Port defaults to 443
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example: $ $0 www.google.com
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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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--sigalg test signature algorithms used in TLSv1.2 ephemeral ciphers
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(req. OpenSSL 1.0.2)
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--[no-]tolerance test TLS tolerance
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--no-sni don't use Server Name Indication
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--colors force use of colors (autodetect by default)
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--no-colors don't use terminal colors
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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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Some useful OpenSSL options:
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-starttls [smtp|imap|pop3|ftp|xmpp] Enable support and testing of the protocols
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that require turning TLS after initial protocol specific
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hello
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-servername name Request SNI support for connections
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-proxy proxyhost:port Connect to the scan target via specified proxy
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(req. OpenSSL 1.1.0 or bundled OpenSSL)
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-verify_hostname name Request host name verification in connection
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(req. OpenSSL 1.0.2)
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-verify_ip ip Request host name verification for an IP address, usually
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not specified in certificates (req. OpenSSL 1.0.2)
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EXAMPLES:
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$0 -starttls xmpp jabber.ccc.de:5222
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$0 -servername youtube.com youtube.com:443
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$0 -proxy myproxy.example.com:8080 youtube.com:443
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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=(
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'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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)
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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=(
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'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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)
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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 $identifier"
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echo "${c%% *}"
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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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if pushd "$1" > /dev/null; then
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ln -s "$2" "${h}.${num}"
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else
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echo "'pushd $1' failed unexpectedly, refusing to proceed" 1>&2
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exit 1
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fi
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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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check_option_support() {
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[[ $OPENSSLBINHELP =~ "$1" ]]
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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_kex_sigalg=""
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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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current_renegotiation="False"
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current_compression=""
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current_npn="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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# get NPN protocols
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if [[ $line =~ Protocols\ advertised\ by\ server:\ (.*) ]]; then
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current_npn="${BASH_REMATCH[1]// /}"
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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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# renegotiation support
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if [[ $line =~ Secure\ Renegotiation\ IS\ supported ]]; then
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current_renegotiation="secure"
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continue
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fi
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if [[ $line =~ Secure\ Renegotiation\ IS\ NOT\ supported ]]; then
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current_renegotiation="insecure"
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continue
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fi
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# compression settings
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if [[ $line =~ Compression:\ (.*) ]]; then
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current_compression="${BASH_REMATCH[1]}"
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continue
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fi
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# extract the signing algorithm used in TLSv1.2 ephemeral kex
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if [[ $line =~ Peer\ signing\ digest ]]; then
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local match=($line)
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current_kex_sigalg="${match[3]}"
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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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|
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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 > 0 )); then
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local ossl_out=$(${OPENSSLBIN} x509 -noout -text 2>/dev/null <<<"${current_raw_certificates[0]}")
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|
local regex='Signature Algorithm[^ ]+ +(.+$)'
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while read data; do
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if [[ $data =~ $regex ]]; then
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current_sigalg="${BASH_REMATCH[1]// /_}"
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fi
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done <<<"$ossl_out"
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fi
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}
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|
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# Connect to a target host with the selected ciphersuite
|
|
test_cipher_on_target() {
|
|
local sslcommand="$*"
|
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cipher=""
|
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local cmnd=""
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protocols=""
|
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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
|
|
npn="$current_npn"
|
|
certificates="$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 $npn $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 [[ -n $ecc_ciphers ]]; then
|
|
ecc_ciphers+=":"
|
|
fi
|
|
ecc_ciphers+="$cipher"
|
|
else
|
|
# resolve the openssl curve to the proper IANA name
|
|
current_curves="$(get_curve_name "$(echo $pfs|cut -d ',' -f2)")"
|
|
curves_ordering="unknown"
|
|
fi
|
|
fi
|
|
result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $npn $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"
|
|
sslcommand+=" -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 (( $? != 0 )); then
|
|
break
|
|
fi
|
|
done
|
|
# Time interval in nanoseconds
|
|
local t="$(($(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+=" -trusted_first -status $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $ciphersuite -nextprotoneg http/1.1"
|
|
|
|
verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'"
|
|
# If the connection succeeded with the current cipher, benchmark and store
|
|
if test_cipher_on_target "$sslcommand"; then
|
|
cipherspref=("${cipherspref[@]}" "$result")
|
|
ciphercertificates=("${ciphercertificates[@]}" "$certificates")
|
|
pciph=($result)
|
|
get_cipher_pref "!$pciph:$ciphersuite"
|
|
return 0
|
|
fi
|
|
}
|
|
|
|
display_sigalgs_in_terminal() {
|
|
(echo "prio sigalg"
|
|
for sigalg in "$@"; do
|
|
if [[ $sigalg == "MD5" ]]; then
|
|
color="${c_red}"
|
|
elif [[ $sigalg == "SHA1" ]]; then
|
|
color="${c_yellow}"
|
|
else
|
|
color="${c_green}"
|
|
fi
|
|
echo -e "$cnt ${color}$sigalg${c_reset}"
|
|
cnt=$((cnt+1))
|
|
done )| column -t
|
|
}
|
|
|
|
display_results_in_terminal() {
|
|
# Display the results
|
|
ctr=1
|
|
local pubkey
|
|
local sigalg
|
|
local trusted
|
|
local tickethint
|
|
local npn
|
|
local ocspstaple
|
|
local curvesordering
|
|
local different=False
|
|
# Configure colors, if terminal supports them
|
|
if [[ $USECOLORS == "auto" ]]; then
|
|
if [[ -t 1 ]]; then
|
|
USECOLORS="True"
|
|
else
|
|
USECOLORS="False"
|
|
fi
|
|
fi
|
|
if [[ $USECOLORS == "True" ]]; then
|
|
c_blue="\033[0;34m"
|
|
c_green="\033[0;32m"
|
|
c_yellow="\033[0;33m"
|
|
c_red="\033[0;31m"
|
|
c_reset="\033[0m"
|
|
else
|
|
c_blue=
|
|
c_green=
|
|
c_yellow=
|
|
c_red=
|
|
c_reset=
|
|
fi
|
|
|
|
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 [[ $ctr -eq 1 ]]; then
|
|
cipher="${cipher_data[1]}"
|
|
pubkey="${cipher_data[2]}"
|
|
sigalg="${cipher_data[3]}"
|
|
trusted="${cipher_data[4]}"
|
|
tickethint="${cipher_data[5]}"
|
|
ocspstaple="${cipher_data[6]}"
|
|
npn="${cipher_data[7]}"
|
|
if [[ $TEST_CURVES == "True" && -n ${cipher_data[10]} ]]; then
|
|
curvesordering="${cipher_data[10]}"
|
|
else
|
|
curvesordering="unknown"
|
|
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 [[ "$npn" != "${cipher_data[7]}" ]]; then
|
|
different=True
|
|
fi
|
|
if [[ "$TEST_CURVES" == "True" && "$curvesordering" != "${cipher_data[10]}" ]]; then
|
|
different=True
|
|
fi
|
|
fi
|
|
results=("${results[@]}" "$r")
|
|
ctr=$((ctr+1))
|
|
done
|
|
|
|
header="prio ciphersuite protocols"
|
|
if [[ $different == "True" ]]; then
|
|
header+=" pubkey_size signature_algoritm trusted ticket_hint ocsp_staple npn"
|
|
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, pfs and benchmark time (if any)
|
|
awk '!/(NONE)/{print $1 " " $2 " " $3 " " $10 " " $11 " " $13 }' <<<"$result"
|
|
fi
|
|
done|column -t
|
|
echo
|
|
|
|
if [[ ($sigalg =~ RSA && $pubkey -ge 2047) || ($cipher =~ ECDSA && $pubkey -gt 255) ]]; then
|
|
pubkey="${c_green}${pubkey}${c_reset}"
|
|
else
|
|
pubkey="${c_red}${pubkey}${c_reset}"
|
|
fi
|
|
if [[ $sigalg =~ md5|sha1 ]]; then
|
|
sigalg="${c_red}${sigalg}${c_reset}"
|
|
else
|
|
sigalg="${c_green}${sigalg}${c_reset}"
|
|
fi
|
|
if [[ $trusted == "True" ]]; then
|
|
trusted="${c_green}trusted${c_reset}"
|
|
else
|
|
trusted="${c_red}untrusted${c_reset}"
|
|
fi
|
|
if [[ $different != "True" ]]; then
|
|
echo -e "Certificate: $trusted, $pubkey bits, $sigalg signature"
|
|
echo "TLS ticket lifetime hint: $tickethint"
|
|
echo "NPN protocols: $npn"
|
|
fi
|
|
if [[ $ocspstaple == "True" ]]; then
|
|
echo -e "OCSP stapling: ${c_green}supported${c_reset}"
|
|
else
|
|
echo -e "OCSP stapling: ${c_red}not supported${c_reset}"
|
|
fi
|
|
if [[ $serverside == "True" ]]; then
|
|
echo -e "Cipher ordering: ${c_green}server${c_reset}"
|
|
else
|
|
echo -e "Cipher ordering: ${c_red}client${c_reset}"
|
|
fi
|
|
if [[ $TEST_CURVES == "True" ]]; then
|
|
if [[ $curvesordering == "server" ]]; then
|
|
curvesordering="${c_green}${curvesordering}${c_reset}"
|
|
else
|
|
if [[ $curvesordering == "" ]]; then
|
|
curvesordering="none"
|
|
fi
|
|
curvesordering="${c_red}${curvesordering}${c_reset}"
|
|
fi
|
|
if [[ $fallback_supported == "True" ]]; then
|
|
fallback_supported="${c_green}yes${c_reset}"
|
|
else
|
|
fallback_supported="${c_red}no${c_reset}"
|
|
fi
|
|
echo -e "Curves ordering: $curvesordering - fallback: $fallback_supported"
|
|
fi
|
|
if [[ $renegotiation ]]; then
|
|
if [[ $renegotiation == "secure" ]]; then
|
|
echo -e "Server ${c_green}supports${c_reset} secure renegotiation"
|
|
else
|
|
echo -e "Server ${c_red}DOESN'T${c_reset} support secure renegotiation"
|
|
fi
|
|
else
|
|
echo "Renegotiation test error"
|
|
fi
|
|
if [[ $compression ]]; then
|
|
if [[ $compression != "NONE" ]]; then
|
|
color="${c_red}"
|
|
else
|
|
color="${c_green}"
|
|
fi
|
|
echo -e "Server supported compression methods:" \
|
|
"${color}$compression${c_reset}"
|
|
else
|
|
echo -e "Supported compression methods ${c_red}test error${c_reset}"
|
|
fi
|
|
|
|
if [[ $TEST_KEX_SIGALG == "True" ]]; then
|
|
echo
|
|
echo "TLSv1.2 ephemeral sigalgs:"
|
|
for auth in "ECDSA" "RSA"; do
|
|
# not colored as neither of that results alone is good or bad
|
|
if [[ -z ${sigalgs_fallback[$auth]} ]]; then
|
|
echo "no PFS $auth ciphers detected"
|
|
elif [[ ${sigalgs_fallback[$auth]} == "False" ]]; then
|
|
echo "no PFS $auth fallback"
|
|
elif [[ ${sigalgs_fallback[$auth]} == "intolerant" ]]; then
|
|
echo "$auth test: intolerant of sigalg removal"
|
|
elif [[ ${sigalgs_fallback[$auth]} =~ "pfs-" ]]; then
|
|
echo "PFS $auth fallbacks to ${sigalgs_fallback[$auth]}"
|
|
else
|
|
echo "server forces ${sigalgs_fallback[$auth]} with $auth"
|
|
fi
|
|
done
|
|
if [[ ${sigalgs_ordering} == "server" ]]; then
|
|
echo -e "${c_green}Server side sigalg ordering${c_reset}"
|
|
elif [[ ${sigalgs_ordering} == "client" ]]; then
|
|
echo -e "${c_red}Client side sigalg ordering${c_reset}"
|
|
elif [[ ${sigalgs_ordering} == "unsupported" ]]; then
|
|
# do nothing - messages above will report that it's unsupported
|
|
echo -n
|
|
else
|
|
echo "Ordering test failure: ${sigalgs_ordering}"
|
|
fi
|
|
|
|
if [[ ${#sigalgs_preferred_ecdsa[@]} -gt 0 ]]; then
|
|
echo
|
|
if [[ ${sigalgs_preferred_ecdsa[0]} == "Fail" ]]; then
|
|
echo -e "${c_red}ECDSA test failed${c_reset}"
|
|
else
|
|
local cnt=1
|
|
echo "Supported PFS ECDSA signature algorithms"
|
|
display_sigalgs_in_terminal "${sigalgs_preferred_ecdsa[@]}"
|
|
fi
|
|
fi
|
|
|
|
if [[ ${#sigalgs_preferred_rsa[@]} -gt 0 ]]; then
|
|
echo
|
|
if [[ ${sigalgs_preferred_rsa[0]} == "Fail" ]]; then
|
|
echo -e "${c_red}RSA test failed${c_reset}"
|
|
else
|
|
local cnt=1
|
|
echo "Supported PFS RSA signature algorithms"
|
|
display_sigalgs_in_terminal "${sigalgs_preferred_rsa[@]}"
|
|
fi
|
|
fi
|
|
echo
|
|
fi
|
|
|
|
if [[ $TEST_TOLERANCE == "True" ]]; then
|
|
if [[ ${tls_tolerance['big-TLSv1.2']} =~ TLSv1\.2 ]]; then
|
|
echo -e "TLS Tolerance: ${c_green}yes${c_reset}"
|
|
else
|
|
echo
|
|
echo -e "TLS Tolerance: ${c_red}no${c_reset}"
|
|
echo "Fallbacks required:"
|
|
for test_name in "${!tls_tolerance[@]}"; do
|
|
if [[ ${tls_tolerance[$test_name]} == "False" ]]; then
|
|
echo "$test_name config not supported, connection failed"
|
|
else
|
|
local res=(${tls_tolerance[$test_name]})
|
|
echo "$test_name no fallback req, connected: ${res[1]} ${res[2]}"
|
|
fi
|
|
done | sort
|
|
fi
|
|
fi
|
|
|
|
echo "$cscan_tests"
|
|
}
|
|
|
|
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=($cipher)
|
|
(( ctr > 0 )) && echo -n ','
|
|
echo -n "{\"cipher\":\"${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\":\"${cipher_arr[6]}\","
|
|
echo -n "\"npn\":[\"${cipher_arr[7]//,/\",\"}\"],"
|
|
pfs="${cipher_arr[8]}"
|
|
[[ -z $pfs ]] && pfs="None"
|
|
echo -n "\"pfs\":\"$pfs\""
|
|
if [[ "${cipher_arr[0]}" =~ ECDH ]]; then
|
|
echo -n ","
|
|
echo -n "\"curves\":[\"${cipher_arr[9]//,/\",\"}\"]"
|
|
if [[ $TEST_CURVES == "True" ]]; then
|
|
echo -n ","
|
|
echo -n "\"curves_ordering\":\"${cipher_arr[10]}\""
|
|
fi
|
|
fi
|
|
echo -n "}"
|
|
ctr=$((ctr+1))
|
|
done
|
|
echo -n ']'
|
|
if [[ $TEST_CURVES == "True" ]]; then
|
|
echo -n ",\"curves_fallback\":\"$fallback_supported\""
|
|
fi
|
|
|
|
if [[ $renegotiation ]]; then
|
|
echo -n ",\"renegotiation\":\"$renegotiation\""
|
|
else
|
|
echo -n ",\"renegotiation\":\"False\""
|
|
fi
|
|
|
|
if [[ $compression ]]; then
|
|
echo -n ",\"compression\":\"$compression\""
|
|
else
|
|
echo -n ",\"compression\":\"False\""
|
|
fi
|
|
|
|
if [[ $TEST_KEX_SIGALG == "True" ]]; then
|
|
echo -n ',"sigalgs":{'
|
|
echo -n "\"ordering\":\"${sigalgs_ordering}\","
|
|
echo -n "\"ECDSA-fallback\":\"${sigalgs_fallback[ECDSA]}\","
|
|
echo -n "\"RSA-fallback\":\"${sigalgs_fallback[RSA]}\""
|
|
if [[ ${#sigalgs_preferred_ecdsa[@]} -gt 0 ]]; then
|
|
echo -n ","
|
|
echo -n '"ECDSA":['
|
|
local cnt=0
|
|
for sigalg in "${sigalgs_preferred_ecdsa[@]}"; do
|
|
if [[ $cnt -gt 0 ]]; then
|
|
echo -n ','
|
|
fi
|
|
echo -n "\"$sigalg\""
|
|
cnt=$((cnt+1))
|
|
done
|
|
echo -n ']'
|
|
fi
|
|
if [[ ${#sigalgs_preferred_rsa[@]} -gt 0 ]]; then
|
|
echo -n ","
|
|
echo -n '"RSA":['
|
|
local cnt=0
|
|
for sigalg in "${sigalgs_preferred_rsa[@]}"; do
|
|
if [[ $cnt -gt 0 ]]; then
|
|
echo -n ','
|
|
fi
|
|
echo -n "\"$sigalg\""
|
|
cnt=$((cnt+1))
|
|
done
|
|
echo -n ']'
|
|
fi
|
|
echo -n '}'
|
|
fi
|
|
|
|
echo -n ',"configs":{'
|
|
ctr=0
|
|
for test_name in "${!tls_tolerance[@]}"; do
|
|
local result=(${tls_tolerance[$test_name]})
|
|
(( ctr > 0 )) && echo -n ","
|
|
echo -n "\"$test_name\":{"
|
|
if [[ ${result[0]} == "False" ]]; then
|
|
echo -n "\"tolerant\":\"False\""
|
|
else
|
|
echo -n "\"tolerant\":\"True\",\"proto\":\"${result[1]}\","
|
|
echo -n "\"cipher\":\"${result[2]}\",\"trusted\":\"${result[3]}\""
|
|
fi
|
|
echo -n "}"
|
|
ctr=$((ctr+1))
|
|
done
|
|
echo -n '}'
|
|
if [[ -n $cscan_tests ]]; then
|
|
echo -n ',"intolerancies":'
|
|
echo -n "$cscan_tests"
|
|
fi
|
|
echo '}'
|
|
}
|
|
|
|
test_serverside_ordering() {
|
|
local -a ciphersuites=()
|
|
local ciphersuite=""
|
|
local prefered=""
|
|
# server supports only one cipher or no ciphers, so it effectively uses server side ordering...
|
|
if (( ${#cipherspref[@]} < 2 )); then
|
|
serverside="True"
|
|
return 0
|
|
fi
|
|
local cipher=""
|
|
if (( ${#cipherspref[@]} > 2 )); then
|
|
# server supports 3 or more ciphers, rotate all three. This is necessary because google does
|
|
# select first client provided cipher, if it is either CDHE-RSA-AES128-GCM-SHA256 or
|
|
# ECDHE-RSA-CHACHA20-POLY1305
|
|
ciphersuites+=("${cipherspref[2]%% *}")
|
|
fi
|
|
# else, server supports just two ciphers, so rotate them, that should be enough
|
|
ciphersuites+=("${cipherspref[1]%% *}")
|
|
ciphersuites+=("${cipherspref[0]%% *}")
|
|
|
|
prefered="${ciphersuites[0]%% *}"
|
|
|
|
join_array_by_char ':' "${ciphersuites[@]}"
|
|
ciphersuite="$joined_array"
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [[ -n "$CAPATH" ]]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [[ -e "$CACERTS" ]]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first -status $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $ciphersuite"
|
|
|
|
test_cipher_on_target "$sslcommand"
|
|
if (( $? != 0 )); then
|
|
serverside="True"
|
|
else
|
|
if [[ ${result%% *} == "$prefered" ]]; then
|
|
serverside="False"
|
|
else
|
|
serverside="True"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
test_curves() {
|
|
# 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=(${CURVES[*]})
|
|
|
|
join_array_by_char ':' "${curves[@]}"
|
|
verbose "Will test following curves: $joined_array"
|
|
|
|
# prepare the ssl command we'll be using
|
|
local sslcommand=""
|
|
sslcommand="$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"
|
|
sslcommand+=" -trusted_first"
|
|
# 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 (( ${#curves[@]} > 0 )); do
|
|
join_array_by_char ':' "${curves[@]}"
|
|
local test_curves="$joined_array"
|
|
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 [[ -n $current_curves ]]; then
|
|
current_curves+=","
|
|
fi
|
|
cname="$(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 (( ${#tmp_curves[@]} < 2 )); then
|
|
curves_ordering="server"
|
|
else
|
|
# server supports at least 2 curves, rotate their order, see if
|
|
# selected changes
|
|
test_curves=""
|
|
most_wanted="${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() {
|
|
# 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 [[ -z $ecc_ciphers ]]; then
|
|
verbose "No ECC cipher found, can't test curve fallback"
|
|
return
|
|
fi
|
|
|
|
# prepare the ssl command we'll be using
|
|
local sslcommand=""
|
|
sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [[ -n "$CAPATH" ]]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [[ -e "$CACERTS" ]]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first"
|
|
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 (( ${#curves[@]} > 0 )); do
|
|
join_array_by_char ':' "${curves[@]}"
|
|
local test_curves="$joined_array"
|
|
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 $current_cipher"
|
|
# ok, we got a fallback
|
|
fallback_supported="True"
|
|
break
|
|
fi
|
|
fi
|
|
done
|
|
}
|
|
|
|
test_tls_tolerance() {
|
|
|
|
#
|
|
# first test general version tolerance with all we've got (full list of
|
|
# curves, full list of ciphers, NPN, ALPN
|
|
#
|
|
declare -A tls_vers_tests
|
|
tls_vers_tests['big-TLSv1.2']=""
|
|
tls_vers_tests['big-TLSv1.1']="-no_tls1_2"
|
|
tls_vers_tests['big-TLSv1.0']="-no_tls1_2 -no_tls1_1"
|
|
tls_vers_tests['big-SSLv3']="-no_tls1_2 -no_tls1_1 -no_tls1"
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first -status -nextprotoneg 'http/1.1'"
|
|
sslcommand+=" $SCLIENTARGS -connect $TARGET -cipher $CIPHERSUITE"
|
|
|
|
for version in "${!tls_vers_tests[@]}"; do
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand ${tls_vers_tests[$version]}"
|
|
local tmp=$(echo Q | $sslcommand ${tls_vers_tests[$version]} 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance[$version]="False"
|
|
else
|
|
tls_tolerance[$version]="True $current_protocol $current_cipher $current_trusted"
|
|
|
|
# collect renegotiation info
|
|
if [[ $current_renegotiation != "False" ]]; then
|
|
renegotiation="$current_renegotiation"
|
|
fi
|
|
|
|
# collect compression info
|
|
if [[ $version == "big-TLSv1.2" || -z $compression ]]; then
|
|
compression="$current_compression"
|
|
fi
|
|
fi
|
|
done
|
|
|
|
# if TLS1.2 didn't succeeded, try different fallbacks
|
|
if [[ ${tls_tolerance['big-TLSv1.2']} == "False" ]]; then
|
|
#
|
|
# Try big client hello, but with a version 2 compatible format
|
|
# (openssl automatically does that when there are SSLv2 ciphers in
|
|
# cipher string and no options are specified)
|
|
#
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [[ -n "$CAPATH" ]]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [[ -e "$CACERTS" ]]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first -connect $TARGET -cipher $CIPHERSUITE"
|
|
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand"
|
|
local tmp=$(echo Q | $sslcommand 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['v2-big-TLSv1.2']="False"
|
|
else
|
|
tls_tolerance['v2-big-TLSv1.2']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# try a smaller, but still v2 compatible Client Hello
|
|
#
|
|
local ciphers="$SHORTCIPHERSUITESTRING"
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [[ -n "$CAPATH" ]]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [[ -e "$CACERTS" ]]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first -connect $TARGET -cipher $ciphers"
|
|
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand"
|
|
local tmp=$(echo Q | $sslcommand 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['v2-small-TLSv1.2']="False"
|
|
else
|
|
tls_tolerance['v2-small-TLSv1.2']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v2, small but with TLS1.1 as max version
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['v2-small-TLSv1.1']="False"
|
|
else
|
|
tls_tolerance['v2-small-TLSv1.1']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v2, small but with TLS1.0 as max version
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2 -no_tls1_1"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 -no_tls1_1 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['v2-small-TLSv1.0']="False"
|
|
else
|
|
tls_tolerance['v2-small-TLSv1.0']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v2, small but with SSLv3 as max version
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2 -no_tls1_1 -no_tls1"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 -no_tls1_1 -no_tls1 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['v2-small-SSLv3']="False"
|
|
else
|
|
tls_tolerance['v2-small-SSLv3']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
|
|
#
|
|
# use v3 format TLSv1.2 hello, small cipher list
|
|
#
|
|
local ciphers="$SHORTCIPHERSUITESTRING"
|
|
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [[ -n "$CAPATH" ]]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [[ -e "$CACERTS" ]]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first"
|
|
sslcommand+=" $SCLIENTARGS -connect $TARGET -cipher $ciphers:!SSLv2"
|
|
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand"
|
|
local tmp=$(echo Q | $sslcommand 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['small-TLSv1.2']="False"
|
|
else
|
|
tls_tolerance['small-TLSv1.2']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v3 format TLSv1.1 hello, small cipher list
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['small-TLSv1.1']="False"
|
|
else
|
|
tls_tolerance['small-TLSv1.1']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v3 format TLSv1.0 hello, small cipher list
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2 -no_tls1_1"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 -no_tls1_1 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['small-TLSv1.0']="False"
|
|
else
|
|
tls_tolerance['small-TLSv1.0']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
|
|
#
|
|
# v3 format TLSv1.0 hello, small cipher list, no extensions
|
|
#
|
|
if check_option_support "-no_tlsext"; then
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2 -no_tls1_1 -no_tlsext"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 -no_tls1_1 -no_tlsext 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['small-TLSv1.0-notlsext']="False"
|
|
else
|
|
tls_tolerance['small-TLSv1.0-notlsext']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
fi
|
|
|
|
#
|
|
# v3 format SSLv3 hello, small cipher list
|
|
#
|
|
ratelimit
|
|
verbose "Testing fallback with $sslcommand -no_tls1_2 -no_tls1_1 -no_tls1"
|
|
local tmp=$(echo Q | $sslcommand -no_tls1_2 -no_tls1_1 -no_tls1 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "Negotiated proto: $current_protocol, cipher: $current_cipher"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == '0000' ]]; then
|
|
tls_tolerance['small-SSLv3']="False"
|
|
else
|
|
tls_tolerance['small-SSLv3']="True $current_protocol $current_cipher $current_trusted"
|
|
fi
|
|
fi
|
|
|
|
# finally run the Python based test to perform more precise scan
|
|
options=()
|
|
options+=("$DIRNAMEPATH/cscan.sh")
|
|
if [[ "$OUTPUTFORMAT" == "json" ]]; then
|
|
options+=(-j)
|
|
else
|
|
if [[ $VERBOSE != 0 ]]; then
|
|
options+=("-v" "--no-header")
|
|
else
|
|
options+=("--no-header")
|
|
fi
|
|
fi
|
|
options+=("$TARGET")
|
|
if [[ -n $sni_target ]]; then
|
|
options+=("$sni_target")
|
|
fi
|
|
cscan_tests="$(${options[*]})"
|
|
}
|
|
|
|
test_kex_sigalgs() {
|
|
local ecdsa_sigalgs=("ECDSA+SHA512" "ECDSA+SHA384" "ECDSA+SHA256"
|
|
"ECDSA+SHA224" "ECDSA+SHA1" "ECDSA+MD5")
|
|
local rsa_sigalgs=("RSA+SHA512" "RSA+SHA384" "RSA+SHA256"
|
|
"RSA+SHA224" "RSA+SHA1" "RSA+MD5")
|
|
|
|
local supported_rsa_ciphers=""
|
|
local supported_ecdsa_ciphers=""
|
|
local supported_ciphers=()
|
|
|
|
# check if TLS1.2 is supported by server, as tests needs it
|
|
# collect ciphers
|
|
local tls12="False"
|
|
for cipher in "${cipherspref[@]}"; do
|
|
local ciph_data=($cipher)
|
|
if [[ ${ciph_data[1]} =~ TLSv1.2 ]]; then
|
|
tls12="True"
|
|
fi
|
|
supported_ciphers+=(${ciph_data[0]})
|
|
done
|
|
|
|
if [[ $tls12 == "False" ]]; then
|
|
return
|
|
fi
|
|
|
|
# create cipher list for ecdsa and rsa tests that include non ephemeral
|
|
# ciphers for fallback
|
|
for cipher in "${supported_ciphers[@]}"; do
|
|
if [[ $cipher =~ DHE-ECDSA ]]; then
|
|
if [[ $supported_ecdsa_ciphers ]]; then
|
|
supported_ecdsa_ciphers+=":"
|
|
fi
|
|
supported_ecdsa_ciphers+="$cipher"
|
|
elif [[ ${supported_ecdsa_ciphers} ]]; then
|
|
supported_ecdsa_ciphers+=":$cipher"
|
|
fi
|
|
|
|
if [[ $cipher =~ DHE-RSA ]]; then
|
|
if [[ $supported_rsa_ciphers ]]; then
|
|
supported_rsa_ciphers+=":"
|
|
fi
|
|
supported_rsa_ciphers+="$cipher"
|
|
elif [[ ${supported_rsa_ciphers} ]]; then
|
|
supported_rsa_ciphers+=":$cipher"
|
|
fi
|
|
done
|
|
|
|
#
|
|
# Test default sigalgs for aECDSA ciphers
|
|
#
|
|
if [[ $supported_ecdsa_ciphers ]]; then
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $supported_ecdsa_ciphers"
|
|
# since some ciphers supported by server may be SSLv2 only, we need to
|
|
# force use of TLSv1.2, otherwise openssl will send a SSLv2 compatible
|
|
# client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
local test_ecdsa_sigalgs=("${ecdsa_sigalgs[@]}")
|
|
local test_rsa_sigalgs=("${rsa_sigalgs[@]}")
|
|
|
|
while true; do
|
|
join_array_by_char ":" "${test_ecdsa_sigalgs[@]}" \
|
|
"${test_rsa_sigalgs[@]}"
|
|
local test_sigalgs="$joined_array"
|
|
|
|
ratelimit
|
|
verbose "Testing default ECDSA sig algs with $sslcommand -sigalgs $test_sigalgs"
|
|
local tmp=$(echo Q | $sslcommand -sigalgs $test_sigalgs 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "server selected $current_cipher, $current_protocol, $current_kex_sigalg"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == "0000" ]]; then
|
|
if [[ ${#test_ecdsa_sigalgs[@]} -eq 0 ]]; then
|
|
sigalgs_fallback["ECDSA"]="False"
|
|
else
|
|
sigalgs_fallback["ECDSA"]="intolerant"
|
|
fi
|
|
break
|
|
fi
|
|
|
|
if [[ $current_cipher =~ DHE-ECDSA ]]; then
|
|
if [[ -z $current_kex_sigalg ]]; then
|
|
# if we didn't get a sigalg that means the test failed
|
|
sigalgs_preferred_ecdsa=("Fail")
|
|
break
|
|
fi
|
|
|
|
if [[ "${test_ecdsa_sigalgs[*]}" =~ "ECDSA+$current_kex_sigalg" ]]; then
|
|
# save sigalg for reporting
|
|
sigalgs_preferred_ecdsa+=("$current_kex_sigalg")
|
|
|
|
# remove it from offered
|
|
local id
|
|
for id in "${!test_ecdsa_sigalgs[@]}"; do
|
|
if [[ ${test_ecdsa_sigalgs[$id]} =~ $current_kex_sigalg ]]; then
|
|
unset test_ecdsa_sigalgs[$id]
|
|
break
|
|
fi
|
|
done
|
|
# continue testing
|
|
else
|
|
# server selected sigalg we didn't offer
|
|
sigalgs_fallback["ECDSA"]="$current_kex_sigalg"
|
|
break
|
|
fi
|
|
elif [[ $current_cipher =~ DHE-RSA ]]; then
|
|
# we got a fallback to a RSA based cipher
|
|
if [[ -z $current_kex_sigalg ]]; then
|
|
sigalgs_fallback["ECDSA"]="pfs-rsa"
|
|
else
|
|
sigalgs_fallback["ECDSA"]="pfs-rsa-${current_kex_sigalg}"
|
|
fi
|
|
break
|
|
else
|
|
# we got a fallback to a non PFS cipher, that's good too
|
|
sigalgs_fallback["ECDSA"]="soft-nopfs"
|
|
break
|
|
fi
|
|
[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
|
|
done
|
|
fi
|
|
|
|
#
|
|
# Test default sigalgs for aRSA ciphers
|
|
#
|
|
if [[ ${supported_rsa_ciphers} ]]; then
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $supported_rsa_ciphers"
|
|
# since some ciphers supported by server may be SSLv2 only, we need to
|
|
# force use of TLSv1.2, otherwise openssl will send a SSLv2 compatible
|
|
# client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
local test_ecdsa_sigalgs=("${ecdsa_sigalgs[@]}")
|
|
local test_rsa_sigalgs=("${rsa_sigalgs[@]}")
|
|
|
|
while true; do
|
|
join_array_by_char ":" "${test_rsa_sigalgs[@]}" \
|
|
"${test_ecdsa_sigalgs[@]}"
|
|
local test_sigalgs="$joined_array"
|
|
|
|
ratelimit
|
|
verbose "Testing default RSA sig algs with $sslcommand -sigalgs $test_sigalgs"
|
|
local tmp=$(echo Q | $sslcommand -sigalgs $test_sigalgs 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "server selected $current_cipher, $current_protocol, $current_kex_sigalg"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == "0000" ]]; then
|
|
if [[ ${#test_rsa_sigalgs[@]} -eq 0 ]]; then
|
|
sigalgs_fallback["RSA"]="False"
|
|
else
|
|
sigalgs_fallback["RSA"]="intolerant"
|
|
fi
|
|
break
|
|
fi
|
|
|
|
if [[ $current_cipher =~ DHE-RSA ]]; then
|
|
if [[ -z $current_kex_sigalg ]]; then
|
|
# if we didn't get a sigalg that means the test failed
|
|
sigalgs_preferred_rsa=("Fail")
|
|
break
|
|
fi
|
|
|
|
if [[ "${test_rsa_sigalgs[*]}" =~ "RSA+$current_kex_sigalg" ]]; then
|
|
# save sigalg for reporting
|
|
sigalgs_preferred_rsa+=("$current_kex_sigalg")
|
|
|
|
# remove it from offered
|
|
local id
|
|
for id in "${!test_rsa_sigalgs[@]}"; do
|
|
if [[ ${test_rsa_sigalgs[$id]} =~ $current_kex_sigalg ]]; then
|
|
unset test_rsa_sigalgs[$id]
|
|
break
|
|
fi
|
|
done
|
|
# continue testing
|
|
else
|
|
# server selected sigalg we didn't offer
|
|
sigalgs_fallback["RSA"]="$current_kex_sigalg"
|
|
break
|
|
fi
|
|
elif [[ $current_cipher =~ DHE-ECDSA ]]; then
|
|
# we got a fallback to an ECDSA based cipher
|
|
if [[ -z $current_kex_sigalg ]]; then
|
|
sigalgs_fallback["RSA"]="pfs-ecdsa"
|
|
else
|
|
sigalgs_fallback["RSA"]="pfs-ecdsa-${current_kex_sigalg}"
|
|
fi
|
|
break
|
|
else
|
|
# we got a fallback to a non PFS cipher, that's good too
|
|
sigalgs_fallback["RSA"]="soft-nopfs"
|
|
break
|
|
fi
|
|
[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
|
|
done
|
|
fi
|
|
|
|
#
|
|
# test which ordering is preferred, server or client
|
|
#
|
|
if [[ ${#sigalgs_preferred_rsa[@]} -eq 0 \
|
|
&& ${#sigalgs_preferred_ecdsa[@]} -eq 0 ]]; then
|
|
sigalgs_ordering="unsupported"
|
|
elif [[ ${#sigalgs_preferred_rsa[@]} -le 1 \
|
|
&& ${#sigalgs_preferred_ecdsa[@]} -le 1 ]]; then
|
|
# if there is just one hash for each signature algorithm, that means
|
|
# the server essentially forces the signature algorithm on client
|
|
sigalgs_ordering="server"
|
|
elif [[ ${#sigalgs_preferred_ecdsa[@]} -gt 1 ]]; then
|
|
# in case server supports multiple ECDSA sigalgs, test just those,
|
|
# even if it supports RSA (since those are more important)
|
|
|
|
# completely rotate order check if negotiated changes
|
|
local test_sigalgs=""
|
|
local i
|
|
for ((i=${#sigalgs_preferred_ecdsa[@]}-1; i>0; i--)); do
|
|
test_sigalgs+="ECDSA+${sigalgs_preferred_ecdsa[$i]}:"
|
|
done
|
|
test_sigalgs+="ECDSA+${sigalgs_preferred_ecdsa[0]}"
|
|
|
|
# prepare the command to run
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $supported_ecdsa_ciphers"
|
|
# since some ciphers supported by server may be SSLv2 only, we need to
|
|
# force use of TLSv1.2, otherwise openssl will send a SSLv2 compatible
|
|
# client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
|
|
ratelimit
|
|
verbose "Test ordering of sigalgs with $sslcommand -sigalgs $test_sigalgs"
|
|
local tmp=$(echo Q | $sslcommand -sigalgs $test_sigalgs 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "server selected $current_cipher, $current_protocol, $current_kex_sigalg"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == "0000" ]]; then
|
|
sigalgs_ordering="intolerant"
|
|
elif [[ -z $current_kex_sigalg ]] || [[ ! $current_cipher =~ DHE-ECDSA ]]; then
|
|
sigalgs_ordering="order-fallback"
|
|
else
|
|
if [[ ${sigalgs_preferred_ecdsa[0]} == $current_kex_sigalg ]]; then
|
|
sigalgs_ordering="server"
|
|
elif [[ ${sigalgs_preferred_ecdsa[${#sigalgs_preferred_ecdsa[@]}-1]} \
|
|
== $current_kex_sigalg ]]; then
|
|
sigalgs_ordering="client"
|
|
else
|
|
sigalgs_ordering="indeterminate"
|
|
fi
|
|
fi
|
|
else
|
|
# test ordering with RSA ciphers
|
|
|
|
# completely rotate order check if negotiated changes
|
|
local test_sigalgs=""
|
|
local i
|
|
for ((i=${#sigalgs_preferred_rsa[@]}-1; i>0; i--)); do
|
|
test_sigalgs+="RSA+${sigalgs_preferred_rsa[$i]}:"
|
|
done
|
|
test_sigalgs+="RSA+${sigalgs_preferred_rsa[0]}"
|
|
|
|
# prepare the command to run
|
|
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
|
if [ -n "$CAPATH" ]; then
|
|
sslcommand+=" -CApath $CAPATH -showcerts"
|
|
elif [ -e "$CACERTS" ]; then
|
|
sslcommand+=" -CAfile $CACERTS"
|
|
fi
|
|
sslcommand+=" -trusted_first $SCLIENTARGS -connect $TARGET"
|
|
sslcommand+=" -cipher $supported_rsa_ciphers"
|
|
# since some ciphers supported by server may be SSLv2 only, we need to
|
|
# force use of TLSv1.2, otherwise openssl will send a SSLv2 compatible
|
|
# client hello
|
|
sslcommand+=" -no_ssl2 -no_ssl3"
|
|
|
|
ratelimit
|
|
verbose "Test ordering of sigalgs with $sslcommand -sigalgs $test_sigalgs"
|
|
local tmp=$(echo Q | $sslcommand -sigalgs $test_sigalgs 2>/dev/null)
|
|
parse_openssl_output <<<"$tmp"
|
|
verbose "server selected $current_cipher, $current_protocol, $current_kex_sigalg"
|
|
if [[ -z $current_protocol || $current_cipher == "(NONE)" \
|
|
|| $current_cipher == "0000" ]]; then
|
|
sigalgs_ordering="intolerant"
|
|
elif [[ -z $current_kex_sigalg ]] || [[ ! $current_cipher =~ DHE-RSA ]]; then
|
|
sigalgs_ordering="order-fallback"
|
|
else
|
|
if [[ ${sigalgs_preferred_rsa[0]} == $current_kex_sigalg ]]; then
|
|
sigalgs_ordering="server"
|
|
elif [[ ${sigalgs_preferred_rsa[${#sigalgs_preferred_rsa[@]}-1]} \
|
|
== $current_kex_sigalg ]]; then
|
|
sigalgs_ordering="client"
|
|
else
|
|
sigalgs_ordering="indeterminate"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
}
|
|
|
|
# If no options are given, give usage information and exit (with error code)
|
|
if (( $# == 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
|
|
;;
|
|
--cafile)
|
|
CACERTS="$2"
|
|
shift 2
|
|
# We need to bypass autodetection if this is provided.
|
|
CACERTS_ARG_SET=1
|
|
;;
|
|
--capath)
|
|
CAPATH="$2"
|
|
shift 2
|
|
;;
|
|
--saveca)
|
|
SAVECA="True"
|
|
shift 1
|
|
;;
|
|
--savecrt)
|
|
SAVECRT="$2"
|
|
shift 2
|
|
;;
|
|
--curves)
|
|
TEST_CURVES="True"
|
|
shift 1
|
|
;;
|
|
--no-curves)
|
|
TEST_CURVES="False"
|
|
shift 1
|
|
;;
|
|
--sigalg)
|
|
TEST_KEX_SIGALG="True"
|
|
shift 1
|
|
;;
|
|
--tolerance)
|
|
TEST_TOLERANCE="True"
|
|
shift 1
|
|
;;
|
|
--no-tolerance)
|
|
TEST_TOLERANCE="False"
|
|
shift 1
|
|
;;
|
|
--colors)
|
|
USECOLORS="True"
|
|
shift 1
|
|
;;
|
|
--no-colors)
|
|
USECOLORS="False"
|
|
shift 1
|
|
;;
|
|
--no-sni)
|
|
SNI="False"
|
|
shift 1
|
|
;;
|
|
--) # End of all options
|
|
shift
|
|
break
|
|
;;
|
|
# -*)
|
|
# UNKNOWNOPTIONS=$((UNKNOWNOPTIONS+$1))
|
|
# # echo "WARN: Unknown option (ignored): $1" >&2
|
|
# shift
|
|
# ;;
|
|
*) # no more options we understand.
|
|
break
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [[ -z $OPENSSLBIN ]]; then
|
|
readlink_result=$("$READLINKBIN" -f "$0")
|
|
if [[ -z $readlink_result ]]; then
|
|
echo "$READLINKBIN -f $0 failed, aborting." 1>&2
|
|
exit 1
|
|
fi
|
|
REALPATH=$(dirname "$readlink_result")
|
|
if [[ -z $REALPATH ]]; then
|
|
echo "dirname $REALPATH failed, aborting." 1>&2
|
|
exit 1
|
|
fi
|
|
OPENSSLBIN="${REALPATH}/${opensslbin_name}"
|
|
if ! [[ -x "${OPENSSLBIN}" ]]; then
|
|
OPENSSLBIN="$(which openssl)" # fallback to generic openssl
|
|
fi
|
|
fi
|
|
# use custom config file to enable GOST ciphers
|
|
if [[ -e $DIRNAMEPATH/openssl.cnf ]]; then
|
|
export OPENSSL_CONF="$DIRNAMEPATH/openssl.cnf"
|
|
fi
|
|
|
|
OPENSSLBINHELP="$($OPENSSLBIN s_client -help 2>&1)"
|
|
if [[ $OPENSSLBINHELP =~ :error: ]]; then
|
|
verbose "$OPENSSLBIN can't handle GOST config, disabling"
|
|
unset OPENSSL_CONF
|
|
OPENSSLBINHELP="$($OPENSSLBIN s_client -help 2>&1)"
|
|
fi
|
|
|
|
if ! [[ $OPENSSLBINHELP =~ -connect ]]; then
|
|
echo "$OPENSSLBIN s_client doesn't accept the -connect parameter, which is extremely strange; refusing to proceed." 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -n $CAPATH && -n $CACERTS ]]; then
|
|
echo "Both directory and file with CA certificates specified" 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -n $ALLCIPHERS && $OUTPUTFORMAT == "json" ]]; then
|
|
echo "--allciphers cannot produce JSON output, aborting." 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
# echo parameters left: $@
|
|
|
|
if (( $# < 1 )); then
|
|
echo "The final argument must be a valid HOST[:PORT], but none was provided." 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
PARAMS=("$@")
|
|
last_element="$(( $# - 1 ))"
|
|
TARGET=${PARAMS[$last_element]}
|
|
unset PARAMS[$last_element]
|
|
|
|
# Refuse to proceed if the hostname starts with a hyphen, since hostnames can't
|
|
# begin with a hyphen and this likely means we accidentally parsed an option as
|
|
# a hostname.
|
|
if [[ -z $TARGET || $TARGET =~ ^[-:] ]]; then
|
|
echo "The final argument '$TARGET' is not a valid HOST[:PORT]." 1>&2
|
|
exit 1
|
|
fi
|
|
# Handle Targets that are URIs
|
|
if [[ $TARGET =~ /([^/]+)(/|$) ]]; then
|
|
TARGET="${BASH_REMATCH[1]}"
|
|
fi
|
|
if [[ $TARGET =~ :.*[^0-9] ]]; then
|
|
echo "Final argument is not a valid HOST[:PORT]" >&2
|
|
exit 1
|
|
fi
|
|
if ! [[ $TARGET =~ : ]]; then
|
|
sni_target=$TARGET
|
|
TARGET="${TARGET}:443"
|
|
else
|
|
# strip the port for the sni_target
|
|
if [[ "$TARGET" =~ (.*):([0-9]{1,5}) ]]; then
|
|
sni_target="${BASH_REMATCH[1]}"
|
|
fi
|
|
fi
|
|
|
|
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" 1>&2
|
|
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" 1>&2
|
|
TEST_CURVES="False"
|
|
fi
|
|
fi
|
|
|
|
if [[ -z $CACERTS ]] && ! [[ -n $CACERTS_ARG_SET ]]; then
|
|
# find a list of trusted CAs on the local system, or use the provided list
|
|
for f in /etc/pki/tls/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt; do
|
|
if [[ -e "$f" ]]; then
|
|
CACERTS="$f"
|
|
break
|
|
fi
|
|
done
|
|
if [[ ! -e "$CACERTS" ]]; then
|
|
CACERTS="$DIRNAMEPATH/ca-bundle.crt"
|
|
fi
|
|
fi
|
|
if ! [[ -e $CACERTS && -r $CACERTS ]]; then
|
|
echo "--cafile $CACERTS is not a readable file, aborting." 1>&2
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -n $CAPATH ]] && ! [[ -d $CAPATH ]]; then
|
|
echo "--capath $CAPATH is not a directory, aborting." 1>&2
|
|
exit 1
|
|
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))"
|
|
$OPENSSLBIN ciphers ALL 2>/dev/null
|
|
fi
|
|
|
|
SCLIENTARGS="${PARAMS[*]}"
|
|
# we need the SNI for cscan, so save it if it was provided through
|
|
# OpenSSL options
|
|
if [[ $SCLIENTARGS =~ servername[\ ]*([^\ ]*)[\ ]* ]]; then
|
|
sni_target="${BASH_REMATCH[1]}"
|
|
fi
|
|
# only append the SNI:
|
|
# if the target is a hostname by validating the tld
|
|
# if -servername was not supplied by the user
|
|
if [[ $SNI == "True" && ! $SCLIENTARGS =~ servername ]]; then
|
|
if [[ $sni_target =~ \.[a-zA-Z]{1,20}$ ]]; then
|
|
SCLIENTARGS="$SCLIENTARGS -servername $sni_target"
|
|
else
|
|
echo "Warning: target is not a FQDN. SNI was disabled. Use a FQDN or '-servername <fqdn>'" 1>&2
|
|
sni_target=''
|
|
fi
|
|
fi
|
|
debug "sclientargs: $SCLIENTARGS"
|
|
|
|
|
|
cipherspref=()
|
|
ciphercertificates=()
|
|
results=()
|
|
|
|
# Call to the recursive loop that retrieves the cipher preferences
|
|
get_cipher_pref $CIPHERSUITE
|
|
|
|
# in case the server is intolerant to our big hello, try again with
|
|
# a smaller one
|
|
# do that either when the normal scan returns no ciphers or just SSLv2
|
|
# ciphers (where it's likely that the limiting by OpenSSL worked)
|
|
pref=(${cipherspref[0]})
|
|
if (( ${#cipherspref[@]} == 0 )) || [[ ${pref[1]} == "SSLv2" ]]; then
|
|
cipherspref=()
|
|
ciphercertificates=()
|
|
results=()
|
|
get_cipher_pref "$FALLBACKCIPHERSUITESTRING"
|
|
fi
|
|
|
|
if [[ $TEST_TOLERANCE == "True" ]]; then
|
|
test_tls_tolerance
|
|
fi
|
|
|
|
test_serverside_ordering
|
|
|
|
if [[ $TEST_KEX_SIGALG == "True" ]]; then
|
|
test_kex_sigalgs
|
|
fi
|
|
|
|
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 [[ -n $ALLCIPHERS ]]; then
|
|
echo; echo "All accepted ciphersuites"
|
|
for c in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort -u); do
|
|
osslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $c"
|
|
if test_cipher_on_target "$osslcommand"; then
|
|
r="pass"
|
|
else
|
|
r="fail"
|
|
fi
|
|
printf "%-35s %s\n" "$c" "$r"
|
|
done
|
|
fi
|