151 lines
3.9 KiB
Bash
Executable File
151 lines
3.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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DOBENCHMARK=0
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BENCHMARKITER=30
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OPENSSLBIN="./openssl"
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TIMEOUT=10
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REQUEST="GET / HTTP/1.1
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Host: $TARGET
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"
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verbose() {
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if [ $VERBOSE -eq 1 ];then
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echo $@
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fi
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}
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# Connect to a target host with the selected ciphersuite
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test_cipher_on_target() {
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local sslcommand=$@
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local tmp=$(mktemp)
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$sslcommand 1>"$tmp" 2>/dev/null << EOF
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$REQUEST
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EOF
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# Parse the result
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result="$(grep "New, " $tmp|awk '{print $5}') $(grep -E "^\s+Protocol\s+:" $tmp|awk '{print $3}') $(grep 'Server Temp Key' $tmp|awk '{print $4$5$6$7}')"
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rm "$tmp"
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if [ -z "$result" ]; then
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verbose "handshake failed, no ciphersuite was returned"
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result='ConnectionFailure'
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return 2
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elif [ "$result" == '(NONE) ' ]; then
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verbose "handshake failed, server returned ciphersuite '$result'"
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return 1
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else
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verbose "handshake succeeded, server returned ciphersuite '$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 -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 $BENCHMARKITER); do
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$sslcommand 2>/dev/null 1>/dev/null << EOF
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$REQUEST
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EOF
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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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get_cipher_pref() {
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local ciphersuite="$1"
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local sslcommand="timeout $TIMEOUT $OPENSSLBIN s_client -connect $TARGET -cipher $ciphersuite"
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verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'"
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test_cipher_on_target "$sslcommand"
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local success=$?
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cipherspref=("${cipherspref[@]}" "$result")
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# If the connection succeeded with the current cipher, benchmark and store
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if [ $success -eq 0 ]; then
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pciph=$(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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}
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if [ -z $1 ]; then
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echo "
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usage: $0 <target:port> <-v>
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$0 attempts to connect to a target site using all the ciphersuites it knowns.
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jvehent - ulfr - 2013
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"
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exit 1
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fi
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TARGET=$1
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VERBOSE=0
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ALLCIPHERS=0
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if [ ! -z $2 ]; then
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if [ "$2" == "-v" ]; then
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VERBOSE=1
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echo "Loading $($OPENSSLBIN ciphers -v ALL 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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if [ "$2" == "-a" ]; then
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ALLCIPHERS=1
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fi
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fi
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cipherspref=();
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results=()
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get_cipher_pref "ALL"
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ctr=1
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for cipher in "${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 $cipher"
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fi
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results=("${results[@]}" "$r")
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ctr=$((ctr+1))
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done
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if [ $DOBENCHMARK -eq 1 ]; then
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header="prio ciphersuite protocol pfs_keysize avg_handshake_microsec"
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else
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header="prio ciphersuite protocol pfs_keysize"
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fi
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ctr=0
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for result in "${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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echo $result|grep -v '(NONE)'
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done|column -t
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if [ $ALLCIPHERS -gt 0 ]; then
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echo; echo "All accepted ciphersuites"
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for cipher in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort|uniq); do
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osslcommand="timeout $TIMEOUT $OPENSSLBIN s_client -connect $TARGET -cipher $cipher"
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test_cipher_on_target "$osslcommand"
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r=$?
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if [ $r -eq 0 ]; then
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echo -en '\E[40;32m'"OK"; tput sgr0
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else
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echo -en '\E[40;31m'"KO"; tput sgr0
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fi
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echo " $cipher"
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done
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fi
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