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https://github.com/drwetter/testssl.sh.git
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Address open UI problems for TLS 1.3 only hosts
While in 3.2 there was only a hint how to deal with TLS 1.3 only hosts, a restart with --openssl=/usr/bin/openssl or setting of OSSL_SHORTCUT-true was required. This PR changes the behavior: if an openssl version can be found in /usr/bin/openssl (or SUPPLIED via OPENSSL2=/home/version/ofopenssl testssl <cmdline>) which supports TLS 1.3 it switches automatically and informs the user that it has done so. This message is asynchonous and is implemented with a new function check_msg() and a global OPEN_MSG, so that we maintain the formatting. Otherwise it would have appeared between rDNS and service detection. Now it's nicely after service detection.
This commit is contained in:
Dirk
58
testssl.sh
58
testssl.sh
@@ -243,9 +243,10 @@ SYSTEM2="" # currently only being used for WSL = ba
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PRINTF="" # which external printf to use. Empty presets the internal one, see #1130
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CIPHERS_BY_STRENGTH_FILE=""
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TLS_DATA_FILE="" # mandatory file for socket-based handshakes
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OPENSSL="" # If you run this from GitHub it's ~/bin/openssl.$(uname).$(uname -m) otherwise /usr/bin/openssl
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OPENSSL2="" # When running from GitHub, this will be openssl version >=1.1.1 (auto determined)
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OPENSSL2_HAS_TLS_1_3=false # If we run with supplied binary AND /usr/bin/openssl supports TLS 1.3 this is set to true
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OPENSSL="" # ~/bin/openssl.$(uname).$(uname -m) if you run this from GitHub. Linux otherwise probably /usr/bin/openssl
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OPENSSL2=${OPENSSL2:-/usr/bin/openssl} # This will be openssl version >=1.1.1 (auto determined) as opposed to openssl-bad (OPENSSL)
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OPENSSL2_HAS_TLS_1_3=false # If we run with supplied binary AND $OPENSSL2 supports TLS 1.3 this wil be set to true
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OSSL_SHORTCUT=${OSSL_SHORTCUT:-true} # Hack: if during the scan turns out the OpenSSL binary supports TLS 1.3 would be a better choice
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OPENSSL_LOCATION=""
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IKNOW_FNAME=false
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FIRST_FINDING=true # is this the first finding we are outputting to file?
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@@ -275,7 +276,6 @@ KNOWN_OSSL_PROB=false # We need OpenSSL a few times. This vari
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DETECTED_TLS_VERSION="" # .. as hex string, e.g. 0300 or 0303
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APP_TRAF_KEY_INFO="" # Information about the application traffic keys for a TLS 1.3 connection.
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TLS13_ONLY=false # Does the server support TLS 1.3 ONLY?
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OSSL_SHORTCUT=${OSSL_SHORTCUT:-false} # Hack: if during the scan turns out the OpenSSL binary supports TLS 1.3 would be a better choice, this enables it.
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TLS_EXTENSIONS=""
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TLS13_CERT_COMPRESS_METHODS=""
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CERTIFICATE_TRANSPARENCY_SOURCE=""
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@@ -415,6 +415,7 @@ END_TIME=0 # .. ended
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SCAN_TIME=0 # diff of both: total scan time
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LAST_TIME=0 # only used for performance measurements (MEASURE_TIME=true)
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SERVER_COUNTER=0 # Counter for multiple servers
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OPEN_MSG="" # Null the poor man's implementation of a message stack
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TLS_LOW_BYTE="" # For "secret" development stuff, see -q below
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HEX_CIPHER="" # -- " --
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@@ -20297,7 +20298,7 @@ find_openssl_binary() {
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# not check /usr/bin/openssl -- if available. This is more a kludge which we shouldn't use for
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# every openssl feature. At some point we need to decide which with openssl version we go.
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# We also check, whether there's /usr/bin/openssl which has TLS 1.3
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OPENSSL2=/usr/bin/openssl
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OPENSSL2=${OPENSSL2:-/usr/bin/openssl}
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if [[ ! "$OSSL_NAME" =~ LibreSSL ]] && [[ ! $OSSL_VER =~ 1.1.1 ]] && [[ ! $OSSL_VER_MAJOR =~ 3 ]]; then
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if [[ -x $OPENSSL2 ]]; then
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$OPENSSL2 s_client -help 2>$s_client_has2
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@@ -21015,6 +21016,9 @@ EOF
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# arg1: text to display before "-->"
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# arg2: arg needed to accept to continue
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# ret=0 : arg was acceppted to continue (batch mode doesn't do this,or warnings are turned off)
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# 1 : arg was not acceppted by user or we're in bacth mode
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ignore_no_or_lame() {
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local a
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@@ -22033,21 +22037,26 @@ determine_optimal_proto() {
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[[ $? -ne 0 ]] && exit $ERR_CLUELESS
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elif "$all_failed" && ! "$ALL_FAILED_SOCKETS"; then
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if ! "$HAS_TLS13" && "$TLS13_ONLY"; then
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pr_magenta " $NODE:$PORT appears to support TLS 1.3 ONLY. You better use --openssl=<path_to_openssl_supporting_TLS_1.3>"
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if ! "$OSSL_SHORTCUT" || [[ ! -x /usr/bin/openssl ]] || /usr/bin/openssl s_client -tls1_3 2>&1 | grep -aiq "unknown option"; then
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outln
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fileout "$jsonID" "WARN" "$NODE:$PORT appears to support TLS 1.3 ONLY, but $OPENSSL does not support TLS 1.3"
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ignore_no_or_lame " Type \"yes\" to proceed with $OPENSSL and accept all scan problems" "yes"
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[[ $? -ne 0 ]] && exit $ERR_CLUELESS
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MAX_OSSL_FAIL=10
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else
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# dirty hack but an idea for the future to be implemented upfront: Now we know, we'll better off
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# with the OS supplied openssl binary. We need to initialize variables / arrays again though.
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# And the service detection can't be made up for now
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outln ", \n proceeding with /usr/bin/openssl"
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OPENSSL=/usr/bin/openssl
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if "$OPENSSL2_HAS_TLS_1_3"; then
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if "$OSSL_SHORTCUT" || [[ "$WARNINGS" == batch ]]; then
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# switch w/o asking
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OPEN_MSG=" $NODE:$PORT appeared to support TLS 1.3 ONLY. Thus switched implictly from\n \"$OPENSSL\" to \"$OPENSSL2\"."
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fileout "$jsonID" "INFO" "$NODE:$PORT appears to support TLS 1.3 ONLY, switching from $OPENSSL to $OPENSSL2 was implictly enforced"
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OPENSSL="$OPENSSL2"
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find_openssl_binary
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prepare_arrays
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else
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# now we need to ask the user
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ignore_no_or_lame " Type \"yes\" to proceed with \"$OPENSSL2\" OR accept all scan problems" "yes"
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if [[ $? -eq 0 ]]; then
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fileout "$jsonID" "INFO" "$NODE:$PORT appears to support TLS 1.3 ONLY, switching from $OPENSSL to $OPENSSL2 by the user"
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OPENSSL="$OPENSSL2"
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find_openssl_binary
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prepare_arrays
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else
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fileout "$jsonID" "WARN" "$NODE:$PORT appears to support TLS 1.3 ONLY, switching from $OPENSSL to $OPENSSL2 was denied by user"
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fi
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fi
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fi
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elif ! "$HAS_SSL3" && [[ "$(has_server_protocol "ssl3")" -eq 0 ]] && [[ "$(has_server_protocol "tls1_3")" -ne 0 ]] && \
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[[ "$(has_server_protocol "tls1_2")" -ne 0 ]] && [[ "$(has_server_protocol "tls1_1")" -ne 0 ]] &&
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@@ -22092,6 +22101,18 @@ determine_optimal_proto() {
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}
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# Check messages which needed to be processed. I.e. those which would have destroyed the nice
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# screen output and thus havve been postponed. This is just an idea and is only used once
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# but can be extended in the future. An array migh be more handy
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#
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check_msg() {
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if [[ -n "$OPEN_MSG" ]]; then
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outln "$OPEN_MSG"
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OPEN_MSG=""
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fi
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}
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# arg1 (optional): ftp smtp, lmtp, pop3, imap, sieve, xmpp, xmpp-server, telnet, ldap, postgres, mysql, irc, nntp (maybe with trailing s)
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#
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determine_service() {
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@@ -22132,6 +22153,7 @@ determine_service() {
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determine_optimal_proto
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# returns always 0:
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service_detection $OPTIMAL_PROTO
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check_msg
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else # STARTTLS
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if [[ "$1" == postgres ]] || [[ "$1" == sieve ]]; then
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protocol="$1"
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