mirror of
https://github.com/mozilla/cipherscan.git
synced 2024-12-27 05:03:42 +01:00
5dfa3c444e
Google servers (like youtube) negotiate ECDSA variant of ciphersuite only if the RSA variant is also present, so to return more comple cipher listing, we need to move ECDSA ciphers before RSA ciphers
385 lines
12 KiB
Bash
Executable File
385 lines
12 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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# Author: Julien Vehent [:ulfr] - 2013
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DOBENCHMARK=0
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BENCHMARKITER=30
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OPENSSLBIN="$(dirname $0)/openssl"
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CACERTS=${CACERTS:-/etc/pki/tls/certs/ca-bundle.crt}
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if [ ! -e "$CACERTS" ]; then
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CACERTS="/etc/ssl/certs/ca-certificates.crt"
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fi
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if [ ! -e "$CACERTS" ]; then
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echo "Warning: CA Certificates not found at $CACERTS, export CACERTS variable with location of your trust anchors" 1>&2
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fi
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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=10
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usage() {
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echo -e "usage: $0 [-a|--allciphers] [-b|--benchmark] [-d|--delay seconds] [-D|--debug] [-j|--json] [-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 knowns.
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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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-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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-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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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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protocols=""
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pfs=""
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previous_cipher=""
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for tls_version in "-ssl2" "-ssl3" "-tls1" "-tls1_1" "-tls1_2"
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do
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debug echo \"Q\" \| $sslcommand $tls_version
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local tmp=$(echo "Q" | $sslcommand $tls_version 1>/dev/stdout 2>/dev/null)
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current_cipher=$(grep "New, " <<<"$tmp"|awk '{print $5}')
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current_pfs=$(grep 'Server Temp Key' <<<"$tmp"|awk '{print $4$5$6$7}')
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current_protocol=$(egrep "^\s+Protocol\s+:" <<<"$tmp"|awk '{print $3}')
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current_pubkey=$(grep 'Server public key is ' <<<"$tmp"|awk '{print $5}')
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if [ -z $current_pubkey ]; then
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current_pubkey=0
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fi
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current_sigalg=$(openssl x509 -noout -text 2>/dev/null <<<"$tmp"|grep Signature\ Algorithm | head -n 1 | awk '{print $3}') || current_sigalg="None"
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grep 'Verify return code: 0 ' <<<"$tmp" >/dev/null
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if [ $? -eq 0 ]; then
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current_trusted="True"
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else
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current_trusted="False"
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fi
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if [ -z $current_sigalg ]; then
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current_sigalg=None
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fi
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if [[ -z "$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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pubkey=$current_pubkey
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sigalg=$current_sigalg
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trusted=$current_trusted
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# grab the cipher and PFS key size
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done
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# if cipher is empty, that means none of the TLS version worked with
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# the current cipher
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if [ -z "$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 $pfs"
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verbose "handshake failed, server returned ciphersuite '$result'"
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return 1
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# the connection succeeded
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else
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result="$cipher $protocols $pubkey $sigalg $trusted $pfs"
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verbose "handshake succeeded, server returned ciphersuite '$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="timeout $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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if [ -e $CACERTS ]; then
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local sslcommand="timeout $TIMEOUT $OPENSSLBIN s_client -CAfile $CACERTS $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
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else
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local sslcommand="timeout $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
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fi
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verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'"
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test_cipher_on_target "$sslcommand"
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local success=$?
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# If the connection succeeded with the current cipher, benchmark and store
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if [ $success -eq 0 ]; then
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cipherspref=("${cipherspref[@]}" "$result")
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pciph=$(echo $result|awk '{print $1}')
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get_cipher_pref "!$pciph:$ciphersuite"
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return 0
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fi
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sleep $DELAY
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}
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display_results_in_terminal() {
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# Display the results
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ctr=1
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local pubkey
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local sigalg
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local trusted
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local different=False
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for cipher in "${cipherspref[@]}"; do
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pciph=$(echo $cipher|awk '{print $1}')
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if [ $DOBENCHMARK -eq 1 ]; then
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bench_cipher "$pciph"
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r="$ctr $cipher $cipherbenchms"
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else
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r="$ctr $cipher"
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fi
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if [ $ctr -eq 1 ]; then
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pubkey=$(awk '{print $3}' <<<$cipher)
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sigalg=$(awk '{print $4}' <<<$cipher)
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trusted=$(awk '{print $5}' <<<$cipher)
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else
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if [ "$pubkey" != "$(awk '{print $3}' <<<$cipher)" ]; then
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different=True
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fi
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if [ "$sigalg" != "$(awk '{print $4}' <<<$cipher)" ]; then
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different=True
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fi
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if [ "$trusted" != "$(awk '{print $5}' <<<$cipher)" ]; then
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different=True
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fi
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fi
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results=("${results[@]}" "$r")
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ctr=$((ctr+1))
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done
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if [ $DOBENCHMARK -eq 1 ]; then
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if [ $different == "True" ]; then
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header="prio ciphersuite protocols pubkey_size signature_algoritm trusted pfs_keysize avg_handshake_microsec"
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else
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header="prio ciphersuite protocols pfs_keysize avg_handshake_microsec"
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fi
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else
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if [ $different == "True" ]; then
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header="prio ciphersuite protocols pubkey_size signature_algorithm trusted pfs_keysize"
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else
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header="prio ciphersuite protocols pfs_keysize"
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fi
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fi
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ctr=0
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for result in "${results[@]}"; do
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if [ $ctr -eq 0 ]; then
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echo $header
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ctr=$((ctr+1))
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fi
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if [ $different == "True" ]; then
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echo $result|grep -v '(NONE)'
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else
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echo $result|grep -v '(NONE)'|awk '{print $1 " " $2 " " $3 " " $7}'
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fi
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done|column -t
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echo
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if [ $different != "True" ]; then
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if [ "$trusted" == "True" ]; then
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echo "Certificate: trusted, $pubkey bit, $sigalg signature"
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else
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echo "Certificate: UNTRUSTED, $pubkey bit, $sigalg signature"
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fi
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fi
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}
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display_results_in_json() {
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# Display the results in json
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ctr=0
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echo -n "{\"target\":\"$TARGET\",\"date\":\"$(date -R)\",\"ciphersuite\": ["
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for cipher in "${cipherspref[@]}"; do
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[ $ctr -gt 0 ] && echo -n ','
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echo -n "{\"cipher\":\"$(echo $cipher|awk '{print $1}')\","
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echo -n "\"protocols\":[\"$(echo $cipher|awk '{print $2}'|sed 's/,/","/g')\"],"
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echo -n "\"pubkey\":[\"$(echo $cipher|awk '{print $3}'|sed 's/,/","/g')\"],"
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echo -n "\"sigalg\":[\"$(echo $cipher|awk '{print $4}'|sed 's/,/","/g')\"],"
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echo -n "\"trusted\":\"$(echo $cipher|awk '{print $5}'|sed 's/,/","/g')\","
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pfs=$(echo $cipher|awk '{print $6}')
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[ "$pfs" == "" ] && pfs="None"
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echo -n "\"pfs\":\"$pfs\"}"
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ctr=$((ctr+1))
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done
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echo ']}'
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}
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# UNKNOWNOPTIONS=""
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while :
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do
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case $1 in
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-h | --help | -\?)
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usage
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exit 0 # This is not an error, User asked help. Don't do "exit 1"
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;;
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-o | --openssl)
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OPENSSLBIN=$2 # You might want to check if you really got FILE
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shift 2
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;;
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-a | --allciphers)
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ALLCIPHERS=1
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shift
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;;
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-v | --verbose)
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# Each instance of -v adds 1 to verbosity
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VERBOSE=$((VERBOSE+1))
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shift
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;;
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-j | -json | --json | --JSON)
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OUTPUTFORMAT="json"
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shift
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;;
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-b | --benchmark)
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DOBENCHMARK=1
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shift
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;;
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-D | --debug)
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DEBUG=1
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shift
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;;
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-d | --delay)
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DELAY=$2
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shift 2
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;;
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--) # End of all options
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shift
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break
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;;
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# -*)
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# UNKNOWNOPTIONS=$((UNKNOWNOPTIONS+$1))
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# # echo "WARN: Unknown option (ignored): $1" >&2
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# shift
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# ;;
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*) # no more options we understand.
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break
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;;
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esac
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done
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if [ $VERBOSE != 0 ] ; then
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echo "Loading $($OPENSSLBIN ciphers -v $CIPHERSUITE 2>/dev/null|grep Kx|wc -l) ciphersuites from $(echo -n $($OPENSSLBIN version 2>/dev/null))"
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$OPENSSLBIN ciphers ALL 2>/dev/null
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fi
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# echo paramters left: $@
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TEMPTARGET=$(sed -e 's/^.* //'<<<"${@}")
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HOST=$(sed -e 's/:.*//'<<<"${TEMPTARGET}")
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PORT=$(sed -e 's/.*://'<<<"${TEMPTARGET}")
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# Default to https if no port given
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if [ "$HOST" = "$PORT" ]; then
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PORT=443
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fi
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debug "host: $HOST"
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debug "Port: $PORT"
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TARGET=$HOST:$PORT
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debug "target: $TARGET"
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SCLIENTARGS=$(sed -e s,${TEMPTARGET},,<<<"${@}")
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debug "sclientargs: $SCLIENTARGS"
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cipherspref=();
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results=()
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# Call to the recursive loop that retrieves the cipher preferences
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get_cipher_pref $CIPHERSUITE
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if [ "$OUTPUTFORMAT" == "json" ]; then
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display_results_in_json
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else
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echo
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display_results_in_terminal
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fi
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# If asked, test every single cipher individually
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if [ $ALLCIPHERS -gt 0 ]; then
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echo; echo "All accepted ciphersuites"
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for c in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort|uniq); do
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r="fail"
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osslcommand="timeout $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $c"
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test_cipher_on_target "$osslcommand"
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if [ $? -eq 0 ]; then
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r="pass"
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fi
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echo "$c $r"|awk '{printf "%-35s %s\n",$1,$2}'
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debug "Sleeping for $DELAY."
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sleep $DELAY
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done
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fi
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