replace if [ ... ] with if [[ ... ]]
Bash implements a backwards-compatible sh syntax for [ .. ], which handles undef variables poorly. Use [[ .. ]] instead, to take full advantage of the Bash improvements to the comparison brackets.
This commit is contained in:
Richard Soderberg
parent
5f43f911bd
commit
6efb1a4afb
150
cipherscan
150
cipherscan
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@ -14,12 +14,12 @@ REALPATH=$(dirname $0)
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# make sure this doesn't error out when readlink -f isn't available (OSX)
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readlink -f $0 &>/dev/null && REALPATH=$(dirname $(readlink -f $0))
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OPENSSLBIN="${REALPATH}/openssl"
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if [ "$(uname -s)" == "Darwin" ]; then
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if [[ "$(uname -s)" == "Darwin" ]]; then
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OPENSSLBIN="${REALPATH}/openssl-darwin64"
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fi
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# cipherscan requires bash4, which doesn't come by default in OSX
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if [ ${BASH_VERSINFO[0]} -lt 4 ]; then
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if [[ ${BASH_VERSINFO[0]} -lt 4 ]]; then
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echo "Bash version 4 is required to run cipherscan."
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echo "Please upgrade your version of bash (ex: brew install bash)."
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exit 1
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@ -28,9 +28,9 @@ fi
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# test that timeout or gtimeout (darwin) are present
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TIMEOUTBIN="$(which timeout)"
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if [ "$TIMEOUTBIN" == "" ]; then
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if [[ "$TIMEOUTBIN" == "" ]]; then
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TIMEOUTBIN="$(which gtimeout)"
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if [ "$TIMEOUTBIN" == "" ]; then
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if [[ "$TIMEOUTBIN" == "" ]]; then
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echo "neither timeout nor gtimeout are present. install coreutils with {apt-get,yum,brew} install coreutils"
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exit 1
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fi
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@ -48,15 +48,15 @@ if [[ -e $(dirname $0)/openssl.cnf ]]; then
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fi
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# find a list of trusted CAs on the local system, or use the provided list
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if [ -z "$CACERTS" ]; then
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if [[ -z "$CACERTS" ]]; then
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for f in /etc/pki/tls/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt; do
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if [ -e "$f" ]; then
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if [[ -e "$f" ]]; then
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CACERTS="$f"
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break
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fi
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done
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fi
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if [ ! -e "$CACERTS" ]; then
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if [[ ! -e "$CACERTS" ]]; then
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CACERTS="$(dirname $0)/ca-bundle.crt"
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fi
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@ -192,13 +192,13 @@ EXAMPLES: $0 -starttls xmpp jabber.ccc.de:5222
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}
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verbose() {
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if [ $VERBOSE != 0 ]; then
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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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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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@ -416,7 +416,7 @@ test_cipher_on_target() {
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# sslv2 client hello doesn't support SNI extension
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# in SSLv3 mode OpenSSL just ignores the setting so it's ok
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# -status exception is ignored in SSLv2, go figure
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if [ "$tls_version" == "-ssl2" ]; then
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if [[ "$tls_version" == "-ssl2" ]]; then
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if [[ "$sslcommand" =~ (.*)(-servername\ [^ ]*)(.*) ]]; then
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cmnd="${BASH_REMATCH[1]} ${BASH_REMATCH[3]}"
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else
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@ -447,7 +447,7 @@ test_cipher_on_target() {
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# compare the values not just checksums so that eventual collision
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# doesn't mess up results
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if [[ ${known_certs[$cksum]} == $cert ]]; then
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if [ -n "${current_certificates}" ]; then
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if [[ -n "${current_certificates}" ]]; then
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current_certificates+=","
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fi
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current_certificates+="\"${cert_checksums[$cksum]}\""
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@ -498,7 +498,7 @@ test_cipher_on_target() {
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fi
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fi
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# save the sha sum for reporting
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if [ -n "${current_certificates}" ]; then
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if [[ -n "${current_certificates}" ]]; then
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current_certificates+=","
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fi
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current_certificates+="\"${sha256sum}\""
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@ -515,20 +515,20 @@ test_cipher_on_target() {
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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" ] && [ "$current_cipher" != "0000" ]; then
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if [[ ! -z "$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 "$protocols" ]; then
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if [[ -z "$protocols" ]]; then
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protocols=$current_protocol
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else
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protocols="$protocols,$current_protocol"
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fi
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cipher=$current_cipher
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pfs=$current_pfs
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[ -z $pfs ] && pfs="None"
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[[ -z $pfs ]] && pfs="None"
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pubkey=$current_pubkey
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sigalg=$current_sigalg
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trusted=$current_trusted
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@ -539,13 +539,13 @@ test_cipher_on_target() {
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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 "$cipher" ]; then
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if [[ -z "$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 [ "$cipher" == '(NONE) ' ]; then
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elif [[ "$cipher" == '(NONE) ' ]]; then
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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verbose "handshake failed, server returned ciphersuite '$result'"
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return 1
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@ -556,9 +556,9 @@ test_cipher_on_target() {
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# if pfs uses ECDH, test supported curves
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if [[ $pfs =~ ECDH ]]; then
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has_curves="True"
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if [ $TEST_CURVES == "True" ]; then
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if [[ $TEST_CURVES == "True" ]]; then
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test_curves
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if [ "$ecc_ciphers" != "" ]; then
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if [[ "$ecc_ciphers" != "" ]]; then
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ecc_ciphers+=":"
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fi
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ecc_ciphers+="$cipher"
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@ -582,7 +582,7 @@ bench_cipher() {
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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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if [[ $? -gt 0 ]]; then
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break
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fi
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done
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@ -596,13 +596,13 @@ bench_cipher() {
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# Connect to the target and retrieve the chosen cipher
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# recursively until the connection fails
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get_cipher_pref() {
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[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
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[[ "$OUTPUTFORMAT" == "terminal" ]] && [[ $DEBUG -lt 1 ]] && echo -n '.'
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local ciphersuite="$1"
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local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
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if [ -n "$CAPATH" ]; then
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if [[ -n "$CAPATH" ]]; then
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sslcommand+=" -CApath $CAPATH -showcerts"
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elif [ -e $CACERTS ]; then
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elif [[ -e $CACERTS ]]; then
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sslcommand+=" -CAfile $CACERTS"
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fi
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sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
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@ -611,7 +611,7 @@ get_cipher_pref() {
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test_cipher_on_target "$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 [[ $success -eq 0 ]]; then
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cipherspref=("${cipherspref[@]}" "$result")
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ciphercertificates=("${ciphercertificates[@]}" "$certificates")
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pciph=($result)
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@ -634,14 +634,14 @@ display_results_in_terminal() {
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for cipher in "${cipherspref[@]}"; do
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# get first in array
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pciph=($cipher)
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if [ $DOBENCHMARK -eq 1 ]; then
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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 $cipher"
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fi
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local cipher_data=($cipher)
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if [ $ctr -eq 1 ]; then
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if [[ $ctr -eq 1 ]]; then
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pubkey="${cipher_data[2]}"
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sigalg="${cipher_data[3]}"
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trusted="${cipher_data[4]}"
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@ -651,19 +651,19 @@ display_results_in_terminal() {
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curvesordering="${cipher_data[9]}"
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fi
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else
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if [ "$pubkey" != "${cipher_data[2]}" ]; then
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if [[ "$pubkey" != "${cipher_data[2]}" ]]; then
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different=True
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fi
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if [ "$sigalg" != "${cipher_data[3]}" ]; then
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if [[ "$sigalg" != "${cipher_data[3]}" ]]; then
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different=True
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fi
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if [ "$trusted" != "${cipher_data[4]}" ]; then
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if [[ "$trusted" != "${cipher_data[4]}" ]]; then
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different=True
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fi
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if [ "$tickethint" != "${cipher_data[5]}" ]; then
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if [[ "$tickethint" != "${cipher_data[5]}" ]]; then
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different=True
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fi
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if [ "$ocspstaple" != "${cipher_data[6]}" ]; then
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if [[ "$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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@ -678,26 +678,26 @@ display_results_in_terminal() {
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done
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header="prio ciphersuite protocols"
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if [ $different == "True" ]; then
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if [[ $different == "True" ]]; then
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header+=" pubkey_size signature_algoritm trusted ticket_hint ocsp_staple"
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fi
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header+=" pfs"
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if [ $has_curves == "True" ]; then
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if [[ $has_curves == "True" ]]; then
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header+=" curves"
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if [[ $TEST_CURVES == "True" && $different == "True" ]]; then
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header+=" curves_ordering"
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fi
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fi
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if [ $DOBENCHMARK -eq 1 ]; then
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if [[ $DOBENCHMARK -eq 1 ]]; then
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header+=" avg_handshake_microsec"
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fi
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ctr=0
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for result in "${results[@]}"; do
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if [ $ctr -eq 0 ]; then
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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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if [[ $different == "True" ]]; then
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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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@ -705,8 +705,8 @@ display_results_in_terminal() {
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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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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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@ -723,7 +723,7 @@ display_results_in_terminal() {
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else
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echo "Cipher ordering: client"
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fi
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if [ $TEST_CURVES == "True" ]; then
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if [[ $TEST_CURVES == "True" ]]; then
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echo "Curves ordering: $curvesordering"
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echo "Curves fallback: $fallback_supported"
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fi
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@ -746,7 +746,7 @@ display_results_in_json() {
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echo -n "{\"target\":\"$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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[[ $ctr -gt 0 ]] && echo -n ','
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echo -n "{\"cipher\":\"${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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@ -758,12 +758,12 @@ 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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[[ "$pfs" == "" ]] && pfs="None"
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echo -n "\"pfs\":\"$pfs\""
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if [[ "${cipher_arr[0]}" =~ ECDH ]]; then
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echo -n ","
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echo -n "\"curves\":[\"${cipher_arr[8]//,/\",\"}\"]"
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if [ $TEST_CURVES == "True" ]; then
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if [[ $TEST_CURVES == "True" ]]; then
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echo -n ","
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echo -n "\"curves_ordering\":\"${cipher_arr[9]}\""
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fi
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@ -772,14 +772,14 @@ display_results_in_json() {
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ctr=$((ctr+1))
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done
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echo -n ']'
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if [ $TEST_CURVES == "True" ]; then
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if [[ $TEST_CURVES == "True" ]]; then
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echo -n ",\"curves_fallback\":\"$fallback_supported\""
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fi
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echo -n ',"configs":{'
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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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[[ $ctr -gt 0 ]] && echo -n ","
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echo -n "\"$test_name\":{"
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if [[ ${result[0]} == "False" ]]; then
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echo -n "\"tolerant\":\"False\""
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@ -826,15 +826,15 @@ test_serverside_ordering() {
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fi
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local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
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if [ -n "$CAPATH" ]; then
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if [[ -n "$CAPATH" ]]; then
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sslcommand+=" -CApath $CAPATH -showcerts"
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elif [ -e "$CACERTS" ]; then
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elif [[ -e "$CACERTS" ]]; then
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sslcommand+=" -CAfile $CACERTS"
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fi
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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 [[ $? -ne 0 ]]; then
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serverside="True"
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else
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local selected=($result)
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@ -866,9 +866,9 @@ test_curves() {
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# prepare the ssl command we'll be using
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local sslcommand=""
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sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
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if [ -n "$CAPATH" ]; then
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if [[ -n "$CAPATH" ]]; then
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sslcommand+=" -CApath $CAPATH -showcerts"
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elif [ -e "$CACERTS" ]; then
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elif [[ -e "$CACERTS" ]]; then
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sslcommand+=" -CAfile $CACERTS"
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fi
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sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $current_cipher"
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@ -900,7 +900,7 @@ test_curves() {
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local ephem_data=(${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 [[ "$current_curves" != "" ]]; then
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current_curves+=","
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fi
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cname="$(get_curve_name ${ephem_data[1]})"
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@ -908,14 +908,14 @@ test_curves() {
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current_curves+="$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[$id]
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break
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fi
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done
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fi
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[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
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[[ "$OUTPUTFORMAT" == "terminal" ]] && [[ $DEBUG -lt 1 ]] && echo -n '.'
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done
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# don't penalize servers that will negotiate all curves we know of...
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@ -932,7 +932,7 @@ 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[@]} -lt 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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@ -961,7 +961,7 @@ test_curves() {
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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 ${ephem_data[1]})"
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if [ "$cname" == "$most_wanted" ]; then
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if [[ "$cname" == "$most_wanted" ]]; then
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curves_ordering="client"
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else
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curves_ordering="server"
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@ -981,7 +981,7 @@ test_curves_fallback() {
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# client doesn't advertise support for curves the server needs
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fallback_supported="unknown"
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|
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if [ "$ecc_ciphers" == "" ]; then
|
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if [[ "$ecc_ciphers" == "" ]]; then
|
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verbose "No ECC cipher found, can't test curve fallback"
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return
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fi
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|
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@ -989,9 +989,9 @@ test_curves_fallback() {
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# prepare the ssl command we'll be using
|
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local sslcommand=""
|
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sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
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if [ -n "$CAPATH" ]; then
|
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if [[ -n "$CAPATH" ]]; then
|
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sslcommand+=" -CApath $CAPATH -showcerts"
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elif [ -e "$CACERTS" ]; then
|
||||
elif [[ -e "$CACERTS" ]]; then
|
||||
sslcommand+=" -CAfile $CACERTS"
|
||||
fi
|
||||
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ecc_ciphers"
|
||||
|
|
@ -1030,7 +1030,7 @@ test_curves_fallback() {
|
|||
local cname="$(get_curve_name ${ephem_data[1]})"
|
||||
verbose "Server selected curve $cname"
|
||||
for id in "${!curves[@]}"; do
|
||||
if [ "${curves[id]}" == "$cname" ]; then
|
||||
if [[ "${curves[id]}" == "$cname" ]]; then
|
||||
unset curves[$id]
|
||||
break
|
||||
fi
|
||||
|
|
@ -1083,9 +1083,9 @@ test_tls_tolerance() {
|
|||
# cipher string and no options are specified)
|
||||
#
|
||||
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [ -n "$CAPATH" ]; then
|
||||
if [[ -n "$CAPATH" ]]; then
|
||||
sslcommand+=" -CApath $CAPATH -showcerts"
|
||||
elif [ -e "$CACERTS" ]; then
|
||||
elif [[ -e "$CACERTS" ]]; then
|
||||
sslcommand+=" -CAfile $CACERTS"
|
||||
fi
|
||||
sslcommand+=" -connect $TARGET -cipher $CIPHERSUITE"
|
||||
|
|
@ -1111,9 +1111,9 @@ test_tls_tolerance() {
|
|||
IFS="$OLDIFS"
|
||||
|
||||
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [ -n "$CAPATH" ]; then
|
||||
if [[ -n "$CAPATH" ]]; then
|
||||
sslcommand+=" -CApath $CAPATH -showcerts"
|
||||
elif [ -e "$CACERTS" ]; then
|
||||
elif [[ -e "$CACERTS" ]]; then
|
||||
sslcommand+=" -CAfile $CACERTS"
|
||||
fi
|
||||
sslcommand+=" -connect $TARGET -cipher $ciphers"
|
||||
|
|
@ -1185,9 +1185,9 @@ test_tls_tolerance() {
|
|||
IFS="$OLDIFS"
|
||||
|
||||
local sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [ -n "$CAPATH" ]; then
|
||||
if [[ -n "$CAPATH" ]]; then
|
||||
sslcommand+=" -CApath $CAPATH -showcerts"
|
||||
elif [ -e "$CACERTS" ]; then
|
||||
elif [[ -e "$CACERTS" ]]; then
|
||||
sslcommand+=" -CAfile $CACERTS"
|
||||
fi
|
||||
sslcommand+=" $SCLIENTARGS -connect $TARGET -cipher $ciphers:!SSLv2"
|
||||
|
|
@ -1269,7 +1269,7 @@ test_tls_tolerance() {
|
|||
}
|
||||
|
||||
# If no options are given, give usage information and exit (with error code)
|
||||
if [ $# -eq 0 ]; then
|
||||
if [[ $# -eq 0 ]]; then
|
||||
usage;
|
||||
exit 1
|
||||
fi
|
||||
|
|
@ -1353,7 +1353,7 @@ HOST=$(sed -e 's/:.*//'<<<"${TEMPTARGET}")
|
|||
PORT=$(sed -e 's/.*://'<<<"${TEMPTARGET}")
|
||||
|
||||
# Default to https if no port given
|
||||
if [ "$HOST" = "$PORT" ]; then
|
||||
if [[ "$HOST" = "$PORT" ]]; then
|
||||
PORT=443
|
||||
fi
|
||||
|
||||
|
|
@ -1364,22 +1364,22 @@ TARGET=$HOST:$PORT
|
|||
debug "target: $TARGET"
|
||||
|
||||
# test our openssl is usable
|
||||
if [ ! -x $OPENSSLBIN ]; then
|
||||
if [[ ! -x $OPENSSLBIN ]]; then
|
||||
OPENSSLBIN=$(which openssl)
|
||||
if [ "$OUTPUTFORMAT" == "terminal" ]; then
|
||||
if [[ "$OUTPUTFORMAT" == "terminal" ]]; then
|
||||
echo "custom openssl not executable, falling back to system one from $OPENSSLBIN"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ $TEST_CURVES == "True" ]; then
|
||||
if [ ! -z "$($OPENSSLBIN s_client -curves 2>&1|head -1|grep 'unknown option')" ]; then
|
||||
if [[ $TEST_CURVES == "True" ]]; then
|
||||
if [[ ! -z "$($OPENSSLBIN s_client -curves 2>&1|head -1|grep 'unknown option')" ]]; then
|
||||
echo "curves testing not available with your version of openssl, disabling it"
|
||||
TEST_CURVES="False"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ $VERBOSE != 0 ] ; then
|
||||
[ -n "$CACERTS" ] && echo "Using trust anchors from $CACERTS"
|
||||
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
|
||||
|
|
@ -1419,7 +1419,7 @@ if [[ $TEST_CURVES == "True" ]]; then
|
|||
test_curves_fallback
|
||||
fi
|
||||
|
||||
if [ "$OUTPUTFORMAT" == "json" ]; then
|
||||
if [[ "$OUTPUTFORMAT" == "json" ]]; then
|
||||
display_results_in_json
|
||||
else
|
||||
echo
|
||||
|
|
@ -1427,13 +1427,13 @@ else
|
|||
fi
|
||||
|
||||
# If asked, test every single cipher individually
|
||||
if [ $ALLCIPHERS -gt 0 ]; then
|
||||
if [[ $ALLCIPHERS -gt 0 ]]; then
|
||||
echo; echo "All accepted ciphersuites"
|
||||
for c in $($OPENSSLBIN ciphers -v ALL:COMPLEMENTOFALL 2>/dev/null |awk '{print $1}'|sort|uniq); do
|
||||
r="fail"
|
||||
osslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $c"
|
||||
test_cipher_on_target "$osslcommand"
|
||||
if [ $? -eq 0 ]; then
|
||||
if [[ $? -eq 0 ]]; then
|
||||
r="pass"
|
||||
fi
|
||||
echo "$c $r"|awk '{printf "%-35s %s\n",$1,$2}'
|
||||
|
|
|
|||
Loading…
Reference in New Issue