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- sockread w/ sleep

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- ccs better documented + more verbose during debug
This commit is contained in:
Dirk 2014-11-18 00:26:58 +01:00
parent 2e6c0a45cd
commit 16279267ea
1 changed files with 21 additions and 12 deletions
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33
testssl.sh
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@ -521,12 +521,9 @@ socksend() {
sleep $3
}
#sockread() {
#SOCKREPLY=`dd bs=$1 count=1 <&5 2>/dev/null`
#}
sockread() {
maxsleep=$MAX_WAITSOCK
[ "x$2" = "x" ] && maxsleep=$MAX_WAITSOCK || maxsleep=$2
ret=0
ddreply=`mktemp /tmp/ddreply.XXXXXX` || exit 7
@ -1041,6 +1038,7 @@ ccs_injection(){
# mainly adapted from Ramon de C Valle's C code from https://gist.github.com/rcvalle/71f4b027d61a78c42607
bold " CCS "; out " (CVE-2014-0224), experimental "
ccs_message="\x14\x03\tls_version\x00\x01\x01" # ChangeCipherSpec, TLS version 2 bytes, lenght 2 bytes, payload CCS 1 byte
# 20/0x14=Change Ciipher Spexcc
$OPENSSL s_client $STARTTLS -connect $NODEIP:$PORT &>$TMPFILE </dev/null
@ -1086,29 +1084,40 @@ ccs_injection(){
fd_socket 5 || return 6
[ $VERBOSE -eq 1 ] && out " sending client hello, "
[ $VERBOSE -eq 1 ] && out "\n sending client hello, "
socksend "$msg" $tls_hexcode 1
sockread 10000
sockread 16384
if [ $VERBOSE -eq 1 ]; then
outln "\n server hello:"
echo "$SOCKREPLY" | xxd -c32 | head -20
outln "[...]"
outln "payload with TLS version $tls_hexcode:"
outln "\npayload #1 with TLS version $tls_hexcode:"
fi
socksend $ccs_message $tls_hexcode 1 || ok_ids
sockread 2048 5 # 5 seconds
if [ $VERBOSE -eq 1 ]; then
outln "\n1st reply: "
out "$SOCKREPLY" | xxd -c32
# ok: 15 | 0301 | 02 | 02 0a == ALERT | TLS 1.0 | Length=2 | Unexpected Message (0a)
outln
outln "payload #2 with TLS version $tls_hexcode:"
fi
socksend $ccs_message $tls_hexcode 2 || ok_ids
sockread 16384
sockread 2048 5
retval=$?
if [ $VERBOSE -eq 1 ]; then
outln "\n reply: "
echo "$SOCKREPLY" | xxd -c32
outln "\n2nd reply: "
out "$SOCKREPLY" | xxd -c32
# not ok: 15 | 0301 | 02 | 02 | 15 == ALERT | TLS 1.0 | Length=2 | Decryption failed (21)
# ok: 0a or nothing: ==> RST
outln
fi
reply_sanitized=`echo "$SOCKREPLY" | xxd -p | tr -cd '[:print:]' | sed 's/^..........//'`
reply_sanitized=`outln "$SOCKREPLY" | xxd -p | tr -cd '[:print:]' | sed 's/^..........//'`
lines=`echo "$SOCKREPLY" | xxd -c32 | wc -l`
if [ "$reply_sanitized" == "0a" ] || [ "$lines" -gt 1 ] ; then
@ -1943,7 +1952,7 @@ case "$1" in
exit $ret ;;
esac
# $Id: testssl.sh,v 1.135 2014/11/17 17:49:54 dirkw Exp $
# $Id: testssl.sh,v 1.136 2014/11/17 23:26:57 dirkw Exp $
# vim:ts=5:sw=5