mirror of
https://github.com/mozilla/cipherscan.git
synced 2024-12-25 04:03:41 +01:00
commit
5526c58ffb
213
cipherscan
213
cipherscan
@ -49,9 +49,9 @@ else
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# test that readlink or greadlink (darwin) are present
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READLINKBIN="$(which readlink)"
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if [[ "$READLINKBIN" == "" ]]; then
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if [[ -z $READLINKBIN ]]; then
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READLINKBIN="$(which greadlink)"
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if [[ "$READLINKBIN" == "" ]]; then
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if [[ -z $READLINKBIN ]]; then
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echo "neither readlink nor greadlink are present. install coreutils with {apt-get,yum,brew} install coreutils" 1>&2
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exit 1
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fi
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@ -60,9 +60,9 @@ else
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# test that timeout or gtimeout (darwin) are present
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TIMEOUTBIN="$(which timeout)"
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if [[ "$TIMEOUTBIN" == "" ]]; then
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if [[ -z $TIMEOUTBIN ]]; then
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TIMEOUTBIN="$(which gtimeout)"
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if [[ "$TIMEOUTBIN" == "" ]]; then
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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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@ -104,6 +104,18 @@ if [[ -e $DIRNAMEPATH/openssl.cnf ]]; then
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export OPENSSL_CONF="$DIRNAMEPATH/openssl.cnf"
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fi
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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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@ -135,6 +147,9 @@ SHORTCIPHERSUITE=(
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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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@ -173,10 +188,13 @@ FALLBACKCIPHERSUITE=(
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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=0
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ALLCIPHERS=""
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OUTPUTFORMAT="terminal"
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TIMEOUT=30
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# place where to put the found intermediate CA certificates and where
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@ -306,12 +324,11 @@ get_curve_name() {
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for c in "${CURVES_MAP[@]}"; do
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if [[ "$c" =~ $identifier ]]; then
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verbose "$c matches identifier $identifier"
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local map=(${c// / })
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echo ${map[0]}
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echo "${c%% *}"
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return
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fi
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done
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echo $identifier
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echo "$identifier"
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return
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}
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@ -340,6 +357,9 @@ check_option_support() {
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[[ $OPENSSLBINHELP =~ "$1" ]]
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}
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# We stop processing certificates on each connection once any of them produces a set of valid certificates.
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current_sigalg="None"
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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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@ -349,7 +369,6 @@ parse_openssl_output() {
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current_tickethint="None"
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current_pubkey=0
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current_trusted="False"
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current_sigalg="None"
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certs_found=0
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current_raw_certificates=()
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@ -414,7 +433,7 @@ parse_openssl_output() {
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fi
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# extract certificates
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if [[ $line =~ -----BEGIN\ CERTIFICATE----- ]]; then
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if [[ $current_sigalg == 'None' && $line =~ -----BEGIN\ CERTIFICATE----- ]]; then
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current_raw_certificates[$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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@ -429,17 +448,12 @@ parse_openssl_output() {
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# if we found any certs in output, process the first one and extract
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# the signature algorithm on it (it's the server's certificate)
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if [[ $certs_found -gt 0 ]]; then
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if (( certs_found > 0 )); then
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local ossl_out=$(${OPENSSLBIN} x509 -noout -text 2>/dev/null <<<"${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 [[ $data =~ Signature\ Algorithm ]]; then
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local match=($data)
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unset match[0]
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unset match[1]
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local old_IFS="$IFS"
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IFS="_"
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current_sigalg="${match[*]}"
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IFS="$old_IFS"
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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 <<<"$ossl_out"
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fi
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@ -447,7 +461,7 @@ parse_openssl_output() {
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# Connect to a target host with the selected ciphersuite
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test_cipher_on_target() {
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local sslcommand=$@
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local sslcommand="$*"
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cipher=""
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local cmnd=""
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protocols=""
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@ -489,7 +503,7 @@ test_cipher_on_target() {
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local cksum=($(cksum <<<"$cert"))
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# compare the values not just checksums so that eventual collision
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# doesn't mess up results
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if [[ ${known_certs[$cksum]} == $cert ]]; then
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if [[ ${known_certs[$cksum]} == "$cert" ]]; then
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if [[ -n "${current_certificates}" ]]; then
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current_certificates+=","
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fi
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@ -601,13 +615,13 @@ test_cipher_on_target() {
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has_curves="True"
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if [[ $TEST_CURVES == "True" ]]; then
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test_curves
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if [[ "$ecc_ciphers" != "" ]]; then
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if [[ -n $ecc_ciphers ]]; then
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ecc_ciphers+=":"
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fi
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ecc_ciphers+="$cipher"
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else
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# resolve the openssl curve to the proper IANA name
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current_curves="$(get_curve_name $(echo $pfs|cut -d ',' -f2))"
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current_curves="$(get_curve_name "$(echo $pfs|cut -d ',' -f2)")"
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fi
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fi
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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@ -623,9 +637,9 @@ bench_cipher() {
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local t="$(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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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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if (( $? != 0 )); then
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break
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fi
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done
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@ -651,10 +665,8 @@ get_cipher_pref() {
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sslcommand+=" -status $SCLIENTARGS -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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# If the connection succeeded with the current cipher, benchmark and store
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if [[ $success -eq 0 ]]; then
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if test_cipher_on_target "$sslcommand"; then
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cipherspref=("${cipherspref[@]}" "$result")
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ciphercertificates=("${ciphercertificates[@]}" "$certificates")
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pciph=($result)
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@ -690,7 +702,7 @@ display_results_in_terminal() {
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trusted="${cipher_data[4]}"
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tickethint="${cipher_data[5]}"
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ocspstaple="${cipher_data[6]}"
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if [[ $TEST_CURVES == "True" && "${cipher_data[9]}" != "" ]]; then
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if [[ $TEST_CURVES == "True" && -n ${cipher_data[9]} ]]; then
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curvesordering="${cipher_data[9]}"
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fi
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else
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@ -709,10 +721,10 @@ display_results_in_terminal() {
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if [[ "$ocspstaple" != "${cipher_data[6]}" ]]; then
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different=True
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fi
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if [[ "$curvesordering" == "" && "${cipher_data[9]}" != "" ]]; then
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if [[ -z $curvesordering && -n "${cipher_data[9]}" ]]; then
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curvesordering="${cipher_data[9]}"
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fi
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if [[ "$curvesordering" != "" && "$curvesordering" != "${cipher_data[9]}" ]]; then
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if [[ -n $curvesordering && "$curvesordering" != "${cipher_data[9]}" ]]; then
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different=True
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fi
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fi
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@ -737,11 +749,11 @@ display_results_in_terminal() {
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ctr=0
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for result in "${results[@]}"; do
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if [[ $ctr -eq 0 ]]; then
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echo $header
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echo "$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 $result|grep -v '(NONE)'
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echo "$result"|grep -v '(NONE)'
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else
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# prints priority, ciphersuite, protocols and pfs
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awk '!/(NONE)/{print $1 " " $2 " " $3 " " $9 " " $10}' <<<"$result"
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@ -789,7 +801,7 @@ display_results_in_json() {
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echo -n "{\"target\":\"$TARGET\",\"utctimestamp\":\"$(date -u '+%FT%T.0Z')\",\"serverside\":\"${serverside}\",\"ciphersuite\": ["
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for cipher in "${cipherspref[@]}"; do
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local cipher_arr=($cipher)
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[[ $ctr -gt 0 ]] && echo -n ','
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(( ctr > 0 )) && echo -n ','
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echo -n "{\"cipher\":\"${cipher_arr[0]}\","
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echo -n "\"protocols\":[\"${cipher_arr[1]//,/\",\"}\"],"
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echo -n "\"pubkey\":[\"${cipher_arr[2]//,/\",\"}\"],"
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@ -801,7 +813,7 @@ display_results_in_json() {
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echo -n "\"ticket_hint\":\"${cipher_arr[5]}\","
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echo -n "\"ocsp_stapling\":\"${cipher_arr[6]}\","
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pfs="${cipher_arr[7]}"
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[[ "$pfs" == "" ]] && pfs="None"
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[[ -z $pfs ]] && pfs="None"
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echo -n "\"pfs\":\"$pfs\""
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if [[ "${cipher_arr[0]}" =~ ECDH ]]; then
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echo -n ","
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@ -822,7 +834,7 @@ display_results_in_json() {
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ctr=0
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for test_name in "${!tls_tolerance[@]}"; do
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local result=(${tls_tolerance[$test_name]})
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[[ $ctr -gt 0 ]] && echo -n ","
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(( ctr > 0 )) && echo -n ","
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echo -n "\"$test_name\":{"
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if [[ ${result[0]} == "False" ]]; then
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echo -n "\"tolerant\":\"False\""
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@ -837,36 +849,29 @@ display_results_in_json() {
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}
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test_serverside_ordering() {
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local -a ciphersuites=()
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local ciphersuite=""
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local prefered=""
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# server supports only one cipher or no ciphers, so it effectively uses server side ordering...
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if [[ ${#cipherspref[@]} -lt 2 ]]; then
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if (( ${#cipherspref[@]} < 2 )); then
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serverside="True"
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return 0
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# server supports just two ciphers, so rotate them, that should be enough
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elif [[ ${#cipherspref[@]} -eq 2 ]]; then
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local cipher=(${cipherspref[1]})
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prefered="$cipher"
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ciphersuite=$cipher
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cipher=(${cipherspref[0]})
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ciphersuite+=":$cipher"
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# server supports 3 or more ciphers, rotate all three. This is necessary because google does
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# select first client provided cipher, if it is either CDHE-RSA-AES128-GCM-SHA256 or
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# ECDHE-RSA-CHACHA20-POLY1305
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else
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local cipher=(${cipherspref[2]})
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prefered="$cipher"
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ciphersuite="$cipher"
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cipher=(${cipherspref[1]})
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ciphersuite+=":$cipher"
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cipher=(${cipherspref[0]})
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ciphersuite+=":$cipher"
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fi
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local cipher=""
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if (( ${#cipherspref[@]} > 2 )); then
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# server supports 3 or more ciphers, rotate all three. This is necessary because google does
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# select first client provided cipher, if it is either CDHE-RSA-AES128-GCM-SHA256 or
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# ECDHE-RSA-CHACHA20-POLY1305
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ciphersuites+=("${cipherspref[2]%% *}")
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fi
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# else, server supports just two ciphers, so rotate them, that should be enough
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ciphersuites+=("${cipherspref[1]%% *}")
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ciphersuites+=("${cipherspref[0]%% *}")
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prefered="${ciphersuites[0]%% *}"
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join_array_by_char ':' "${ciphersuites[@]}"
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ciphersuite="$joined_array"
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local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
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if [[ -n "$CAPATH" ]]; then
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@ -877,11 +882,10 @@ test_serverside_ordering() {
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sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
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test_cipher_on_target "$sslcommand"
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if [[ $? -ne 0 ]]; then
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if (( $? != 0 )); then
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serverside="True"
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else
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local selected=($result)
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if [[ $selected == $prefered ]]; then
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if [[ ${result%% *} == "$prefered" ]]; then
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serverside="False"
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else
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serverside="True"
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@ -898,10 +902,8 @@ test_curves() {
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local curves=(${CURVES[*]})
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OLDIFS="$IFS"
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IFS=':'
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verbose "Will test following curves: ${curves[*]}"
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IFS="$OLDIFS"
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join_array_by_char ':' "${curves[@]}"
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verbose "Will test following curves: $joined_array"
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# prepare the ssl command we'll be using
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local sslcommand=""
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@ -922,15 +924,13 @@ test_curves() {
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# either get a fallback to a non ECC cipher, we run of curves or server
|
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# tries to negotiate a curve we didn't advertise
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#
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while [[ ${#curves[@]} -gt 0 ]]; do
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OLDIFS="$IFS"
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IFS=':'
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local test_curves="${curves[*]}"
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IFS="$OLDIFS"
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while (( ${#curves[@]} > 0 )); do
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join_array_by_char ':' "${curves[@]}"
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local test_curves="$joined_array"
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verbose "Testing $test_curves with command $sslcommand"
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ratelimit
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local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
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local tmp=$(echo Q | $sslcommand -curves "$test_curves" 2>/dev/null)
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parse_openssl_output <<<"$tmp"
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|
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if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
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@ -940,15 +940,15 @@ test_curves() {
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local ephem_data=(${current_pfs//,/ })
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local cname=""
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if [[ ${ephem_data[0]} =~ ECDH ]]; then
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if [[ "$current_curves" != "" ]]; then
|
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if [[ -n $current_curves ]]; then
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current_curves+=","
|
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fi
|
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cname="$(get_curve_name ${ephem_data[1]})"
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cname="$(get_curve_name "${ephem_data[1]}")"
|
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verbose "Server selected ${ephem_data[1]}, a.k.a $cname"
|
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current_curves+="$cname"
|
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fi
|
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for id in "${!curves[@]}"; do
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if [[ "$cname" == ${curves[$id]} ]]; then
|
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if [[ $cname == "${curves[$id]}" ]]; then
|
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# we know it's supported, remove it from set of offered ones
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unset curves[$id]
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break
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@ -972,7 +972,7 @@ test_curves() {
|
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|
||||
# server supports just one or none, so it effectively uses server side
|
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# ordering (as it dictates what curves client must support)
|
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if [[ ${#tmp_curves[@]} -lt 2 ]]; then
|
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if (( ${#tmp_curves[@]} < 2 )); then
|
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curves_ordering="server"
|
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else
|
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# server supports at least 2 curves, rotate their order, see if
|
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@ -986,7 +986,7 @@ test_curves() {
|
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|
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verbose "Testing ordering with $sslcommand -curves $test_curves"
|
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ratelimit
|
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local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
|
||||
local tmp=$(echo Q | $sslcommand -curves "$test_curves" 2>/dev/null)
|
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parse_openssl_output <<<"$tmp"
|
||||
|
||||
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
||||
@ -1000,7 +1000,7 @@ test_curves() {
|
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if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
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verbose "Server did select ${ephem_data[1]} curve"
|
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curves_ordering="inconclusive-${ephem_data[1]}"
|
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local cname="$(get_curve_name ${ephem_data[1]})"
|
||||
local cname="$(get_curve_name "${ephem_data[1]}")"
|
||||
if [[ "$cname" == "$most_wanted" ]]; then
|
||||
curves_ordering="client"
|
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else
|
||||
@ -1019,7 +1019,7 @@ test_curves_fallback() {
|
||||
# client doesn't advertise support for curves the server needs
|
||||
fallback_supported="unknown"
|
||||
|
||||
if [[ "$ecc_ciphers" == "" ]]; then
|
||||
if [[ -z $ecc_ciphers ]]; then
|
||||
verbose "No ECC cipher found, can't test curve fallback"
|
||||
return
|
||||
fi
|
||||
@ -1044,15 +1044,13 @@ test_curves_fallback() {
|
||||
# tries to negotiate a curve we didn't advertise
|
||||
#
|
||||
local curves=(${CURVES[*]})
|
||||
while [[ ${#curves[@]} -gt 0 ]]; do
|
||||
OLDIFS="$IFS"
|
||||
IFS=':'
|
||||
local test_curves="${curves[*]}"
|
||||
IFS="$OLDIFS"
|
||||
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 $test_curves 2>/dev/null)
|
||||
local tmp=$(echo Q | $sslcommand -curves "$test_curves" 2>/dev/null)
|
||||
parse_openssl_output <<<"$tmp"
|
||||
|
||||
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
||||
@ -1065,7 +1063,7 @@ test_curves_fallback() {
|
||||
|
||||
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 ${ephem_data[1]})"
|
||||
local cname="$(get_curve_name "${ephem_data[1]}")"
|
||||
verbose "Server selected curve $cname"
|
||||
for id in "${!curves[@]}"; do
|
||||
if [[ "${curves[id]}" == "$cname" ]]; then
|
||||
@ -1143,10 +1141,7 @@ test_tls_tolerance() {
|
||||
#
|
||||
# try a smaller, but still v2 compatible Client Hello
|
||||
#
|
||||
OLDIFS="$IFS"
|
||||
IFS=":"
|
||||
local ciphers="${SHORTCIPHERSUITE[*]}"
|
||||
IFS="$OLDIFS"
|
||||
local ciphers="$SHORTCIPHERSUITESTRING"
|
||||
|
||||
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [[ -n "$CAPATH" ]]; then
|
||||
@ -1217,10 +1212,7 @@ test_tls_tolerance() {
|
||||
#
|
||||
# use v3 format TLSv1.2 hello, small cipher list
|
||||
#
|
||||
OLDIFS="$IFS"
|
||||
IFS=":"
|
||||
local ciphers="${SHORTCIPHERSUITE[*]}"
|
||||
IFS="$OLDIFS"
|
||||
local ciphers="$SHORTCIPHERSUITESTRING"
|
||||
|
||||
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [[ -n "$CAPATH" ]]; then
|
||||
@ -1307,7 +1299,7 @@ test_tls_tolerance() {
|
||||
}
|
||||
|
||||
# If no options are given, give usage information and exit (with error code)
|
||||
if [[ $# -eq 0 ]]; then
|
||||
if (( $# == 0 )); then
|
||||
usage
|
||||
exit 1
|
||||
fi
|
||||
@ -1395,6 +1387,11 @@ if [[ -n $CAPATH && -n $CACERTS ]]; then
|
||||
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
|
||||
@ -1423,13 +1420,13 @@ debug "target: $TARGET"
|
||||
if [[ ! -x $OPENSSLBIN ]]; then
|
||||
OPENSSLBIN=$(which openssl)
|
||||
if [[ "$OUTPUTFORMAT" == "terminal" ]]; then
|
||||
echo "custom openssl not executable, falling back to system one from $OPENSSLBIN"
|
||||
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"
|
||||
echo "curves testing not available with your version of openssl, disabling it" 1>&2
|
||||
TEST_CURVES="False"
|
||||
fi
|
||||
fi
|
||||
@ -1478,15 +1475,11 @@ get_cipher_pref $CIPHERSUITE
|
||||
# do that either when the normal scan returns no ciphers or just SSLv2
|
||||
# ciphers (where it's likely that the limiting by OpenSSL worked)
|
||||
pref=(${cipherspref[0]})
|
||||
if [[ ${#cipherspref[@]} -eq 0 ]] || [[ ${pref[1]} == "SSLv2" ]]; then
|
||||
if (( ${#cipherspref[@]} == 0 )) || [[ ${pref[1]} == "SSLv2" ]]; then
|
||||
cipherspref=()
|
||||
ciphercertificates=()
|
||||
results=()
|
||||
OLDIFS="$IFS"
|
||||
IFS=":"
|
||||
CIPHERS="${FALLBACKCIPHERSUITE[*]}"
|
||||
IFS="$OLDIFS"
|
||||
get_cipher_pref "$CIPHERS"
|
||||
get_cipher_pref "$FALLBACKCIPHERSUITESTRING"
|
||||
fi
|
||||
|
||||
test_tls_tolerance
|
||||
@ -1505,15 +1498,15 @@ else
|
||||
fi
|
||||
|
||||
# If asked, test every single cipher individually
|
||||
if [[ $ALLCIPHERS -gt 0 ]]; then
|
||||
if [[ -n $ALLCIPHERS ]]; then
|
||||
echo; echo "All accepted ciphersuites"
|
||||
for c in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort|uniq); do
|
||||
r="fail"
|
||||
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 $c"
|
||||
test_cipher_on_target "$osslcommand"
|
||||
if [[ $? -eq 0 ]]; then
|
||||
if test_cipher_on_target "$osslcommand"; then
|
||||
r="pass"
|
||||
else
|
||||
r="fail"
|
||||
fi
|
||||
echo "$c $r"|awk '{printf "%-35s %s\n",$1,$2}'
|
||||
printf "%-35s %s\n" "$c" "$r"
|
||||
done
|
||||
fi
|
||||
|
Loading…
Reference in New Issue
Block a user