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testssl.sh
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Merge pull request #529 from dcooper16/parse_tls_serverhello6 

Extend TLS ServerHello parsing (part 6)
This commit is contained in:
Dirk Wetter 2016-11-19 22:26:56 +01:00 committed by GitHub
parent 0d74b798fb d02a0af8af
commit e0f7bc4062
1 changed files with 51 additions and 2 deletions
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testssl.sh
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@ -6779,7 +6779,29 @@ parse_tls_serverhello() {
000D) tls_extensions+=" \"signature algorithms/#13\"" ;;
000E) tls_extensions+=" \"use SRTP/#14\"" ;;
000F) tls_extensions+=" \"heartbeat/#15\"" ;;
0010) tls_extensions+=" \"application layer protocol negotiation/#16\"" ;;
0010) tls_extensions+=" \"application layer protocol negotiation/#16\""
if [[ $extension_len -lt 4 ]]; then
debugme echo "Malformed application layer protocol negotiation extension."
return 1
fi
echo -n "ALPN protocol: " >> $TMPFILE
let offset=$extns_offset+12+$i
j=2*$(hex2dec "${tls_serverhello_ascii:offset:4}")
if [[ $extension_len -ne $j+4 ]] || [[ $j -lt 2 ]]; then
debugme echo "Malformed application layer protocol negotiation extension."
return 1
fi
let offset=$offset+4
j=2*$(hex2dec "${tls_serverhello_ascii:offset:2}")
if [[ $extension_len -ne $j+6 ]]; then
debugme echo "Malformed application layer protocol negotiation extension."
return 1
fi
let offset=$offset+2
asciihex_to_binary_file "${tls_serverhello_ascii:offset:j}" "$TMPFILE"
echo "" >> $TMPFILE
echo "===============================================================================" >> $TMPFILE
;;
0011) tls_extensions+=" \"certificate status version 2/#17\"" ;;
0012) tls_extensions+=" \"signed certificate timestamps/#18\"" ;;
0013) tls_extensions+=" \"client certificate type/#19\"" ;;
@ -6797,7 +6819,28 @@ parse_tls_serverhello() {
002C) tls_extensions+=" \"cookie/#44\"" ;;
002D) tls_extensions+=" \"psk key exchange modes/#45\"" ;;
002E) tls_extensions+=" \"ticket early data info/#46\"" ;;
3374) tls_extensions+=" \"next protocol/#13172\"" ;;
3374) tls_extensions+=" \"next protocol/#13172\""
local -i protocol_len
echo -n "Protocols advertised by server: " >> $TMPFILE
let offset=$extns_offset+12+$i
for (( j=0; j<extension_len; j=j+protocol_len+2 )); do
if [[ $extension_len -lt $j+2 ]]; then
debugme echo "Malformed next protocol extension."
return 1
fi
protocol_len=2*$(hex2dec "${tls_serverhello_ascii:offset:2}")
if [[ $extension_len -lt $j+$protocol_len+2 ]]; then
debugme echo "Malformed next protocol extension."
return 1
fi
let offset=$offset+2
asciihex_to_binary_file "${tls_serverhello_ascii:offset:protocol_len}" "$TMPFILE"
let offset=$offset+$protocol_len
[[ $j+$protocol_len+2 -lt $extension_len ]] && echo -n ", " >> $TMPFILE
done
echo "" >> $TMPFILE
echo "===============================================================================" >> $TMPFILE
;;
FF01) tls_extensions+=" \"renegotiation info/#65281\"" ;;
*) tls_extensions+=" \"unrecognized extension/#$(printf "%d\n\n" "0x$extension_type")\"" ;;
esac
@ -6849,6 +6892,12 @@ parse_tls_serverhello() {
fi
if [[ "$process_full" == "all" ]]; then
echo " tls_extensions: $TLS_EXTENSIONS"
if [[ "$TLS_EXTENSIONS" =~ "application layer protocol negotiation" ]]; then
echo " ALPN protocol: $(grep "ALPN protocol:" "$TMPFILE" | sed 's/ALPN protocol: //')"
fi
if [[ "$TLS_EXTENSIONS" =~ "next protocol" ]]; then
echo " NPN protocols: $(grep "Protocols advertised by server:" "$TMPFILE" | sed 's/Protocols advertised by server: //')"
fi
fi
outln
fi