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testssl.sh
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preliminary fix for #189 (SIZELMT_W_ARND=true needed)

This commit is contained in:
Dirk 2016-06-07 13:02:58 +02:00
parent 29072315e5
commit 8ed6214b6f
1 changed files with 91 additions and 12 deletions
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103
testssl.sh
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@ -151,6 +151,7 @@ JSONFILE=${JSONFILE:-""} # jsonfile if used
CSVFILE=${CSVFILE:-""} # csvfile if used
HAS_IPv6=${HAS_IPv6:-false} # if you have OpenSSL with IPv6 support AND IPv6 networking set it to yes
UNBRACKTD_IPV6=${UNBRACKTD_IPV6:-false} # some versions of OpenSSL (like Gentoo) don't support [bracketed] IPv6 addresses
SIZELMT_W_ARND=${SIZELMT_W_ARND:-false} # workaround for servers which have either a ClientHello total size limit or cipher limit of ~128 ciphers (e.g. old ASAs)
# tuning vars, can not be set by a cmd line switch
EXPERIMENTAL=${EXPERIMENTAL:-false}
@ -2689,6 +2690,75 @@ run_server_preference() {
return 0
}
check_tls12_pref() {
local batchremoved="-CAMELLIA:-IDEA:-KRB5:-PSK:-SRP:-aNULL:-eNULL"
local batchremoved_success=false
local tested_cipher="-$1"
local order="$1"
while true; do
$OPENSSL s_client $STARTTLS -tls1_2 $BUGS -cipher "ALL:$tested_cipher:$batchremoved" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE ; then
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
order+=" $cipher"
tested_cipher="$tested_cipher:-$cipher"
else
debugme outln "A: $tested_cipher"
break
fi
done
batchremoved="${batchremoved//-/}"
while true; do
# no ciphers from "ALL:$tested_cipher:$batchremoved" left
# now we check $batchremoved, and remove the minus signs first:
$OPENSSL s_client $STARTTLS -tls1_2 $BUGS -cipher "$batchremoved" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE ; then
batchremoved_success=true # signals that we have some of those ciphers and need to put everything together later on
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
order+=" $cipher"
batchremoved="$batchremoved:-$cipher"
debugme outln "B1: $batchremoved"
else
debugme outln "B2: $batchremoved"
break
# nothing left with batchremoved ciphers, we need to put everything together
fi
done
if "$batchremoved_success"; then
# now we combine the two cipher sets from both while loops
combined_ciphers="${order// /:}"
$OPENSSL s_client $STARTTLS -tls1_2 $BUGS -cipher "$combined_ciphers" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE ; then
# first cipher
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
order="$cipher"
tested_cipher="-$cipher"
else
pr_warningln "fixme: something weird happened around line $((LINENO - 6))"
return 1
fi
while true; do
$OPENSSL s_client $STARTTLS -tls1_2 $BUGS -cipher "$combined_ciphers:$tested_cipher" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE ; then
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
order+=" $cipher"
tested_cipher="$tested_cipher:-$cipher"
else
# nothing left, we're done
out " $order"
break
fi
done
else
# second cipher set didn't succeed: we can just output everything
out " $order"
fi
return 0
}
cipher_pref_check() {
local p proto protos npn_protos
local tested_cipher cipher order
@ -2710,19 +2780,28 @@ cipher_pref_check() {
tested_cipher=""
proto=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g')
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
[[ -z "$proto" ]] && continue # for early openssl versions sometimes needed
[[ -z "$proto" ]] && continue # for early openssl versions sometimes needed
outln
printf " %-10s %s " "$proto:" "$cipher"
printf " %-10s" "$proto: "
tested_cipher="-"$cipher
order="$cipher"
while true; do
$OPENSSL s_client $STARTTLS -"$p" $BUGS -cipher "ALL:$tested_cipher" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE || break
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
out "$cipher "
order+=" $cipher"
tested_cipher="$tested_cipher:-$cipher"
done
if [[ $p == tls1_2 ]] && "$SIZELMT_W_ARND"; then
# for some servers the ServerHello is limited to 128 ciphers or the ServerHello itself has a length restriction
# thus we reduce the number of ciphers we throw at the server and put later everything together
# see #189
# so far, this was only observed in TLS 1.2
check_tls12_pref "$cipher"
else
out " $cipher" # this is the first cipher for protocol
while true; do
$OPENSSL s_client $STARTTLS -"$p" $BUGS -cipher "ALL:$tested_cipher" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE || break
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
out " $cipher"
order+=" $cipher"
tested_cipher="$tested_cipher:-$cipher"
done
fi
fi
[[ -z "$order" ]] || fileout "order_$p" "INFO" "Default cipher order for protocol $p: $order"
done
@ -2736,7 +2815,7 @@ cipher_pref_check() {
order=""
$OPENSSL s_client -host $NODE -port $PORT $BUGS -nextprotoneg "$p" $PROXY </dev/null 2>>$ERRFILE >$TMPFILE
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
printf " %-10s %s " "$p:" "$cipher"
printf " %-10s %s " "$p:" "$cipher"
tested_cipher="-"$cipher
order="$cipher"
while true; do
@ -7275,4 +7354,4 @@ fi
exit $?
# $Id: testssl.sh,v 1.494 2016/06/07 07:08:47 dirkw Exp $
# $Id: testssl.sh,v 1.495 2016/06/07 11:02:57 dirkw Exp $