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run_cipher_per_proto speedup 

This PR makes basically the same changes to run_cipher_per_proto() as I previously made to run_allciphers(). The main difference is that in this function, round 0 consists of a single call to "$OPENSSL s_client" with "-cipher" including all of the locally supported ciphers. The reason for the difference is that in run_allciphers() its saves time to assume the server supports at least one cipher suite. In the case of run_cipher_per_proto(), however, it is likely that the server will not support some protocols at all, so its usually faster to start with a single call to "$OPENSSL s_client" that tests whether the server supports the protocol at all.
This commit is contained in:
David Cooper 2016-03-31 09:38:20 -04:00
parent 16927f523f
commit bbcc869dec
1 changed files with 87 additions and 35 deletions
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testssl.sh
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@ -1670,11 +1670,14 @@ run_allciphers() {
return 0
}
# test for all ciphers per protocol locally configured (w/o distinguishing whether they are good or bad
# test for all ciphers per protocol locally configured (w/o distinguishing whether they are good or bad)
run_cipher_per_proto() {
local proto proto_text
local hexcode n ciph sslvers kx auth enc mac export
local -i sclient_success=0
local -i nr_ciphers
local n sslvers auth mac export
local -a hexcode ciph kx enc export2
local -i i j parent child end_of_bundle round_num bundle_size num_bundles mod_check
local -a ciphers_found
local dhlen
local available
local id
@ -1686,39 +1689,88 @@ run_cipher_per_proto(){
outln " -ssl2 SSLv2\n -ssl3 SSLv3\n -tls1 TLS 1\n -tls1_1 TLS 1.1\n -tls1_2 TLS 1.2"| while read proto proto_text; do
locally_supported "$proto" "$proto_text" || continue
outln
$OPENSSL ciphers $proto -V 'ALL:COMPLEMENTOFALL:@STRENGTH' 2>$ERRFILE | while read hexcode n ciph sslvers kx auth enc mac export; do # -V doesn't work with openssl < 1.0
$OPENSSL s_client -cipher $ciph $proto $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE </dev/null
# get a list of all the cipher suites to test (only need the hexcode, ciph, kx, enc, and export values)
nr_ciphers=0
while read hexcode[nr_ciphers] n ciph[nr_ciphers] sslvers kx[nr_ciphers] auth enc[nr_ciphers] mac export2[nr_ciphers]; do
nr_ciphers=$nr_ciphers+1
done < <($OPENSSL ciphers $proto -V 'ALL:COMPLEMENTOFALL:@STRENGTH' 2>$ERRFILE)
# Split ciphers into bundles of size 4**n, starting with the smallest
# "n" that leaves the ciphers in one bundle, and then reducing "n" by
# one in each round. Only test a bundle of 4**n ciphers against the
# server if it was part of a bundle of 4**(n+1) ciphers that included
# a cipher supported by the server. Continue until n=0.
# Determine the smallest bundle size that will result in their being one bundle.
for(( bundle_size=1; bundle_size < nr_ciphers; bundle_size*=4 )); do
:
done
# set ciphers_found[1] so that the complete bundle will be tested in round 0.
ciphers_found[1]=true
for (( round_num=0; bundle_size>=1; bundle_size/=4 )); do
# Note that since the number of ciphers isn't a power of 4, the number
# of bundles may be may be less than 4**(round_num+1), and the final
# bundle may have fewer than bundle_size ciphers.
num_bundles=$nr_ciphers/$bundle_size
mod_check=$nr_ciphers%$bundle_size
[[ $mod_check -ne 0 ]] && num_bundles=$num_bundles+1
for (( i=0; i<num_bundles; i++ )); do
# parent=index of bundle from previous round that includes this bundle of ciphers
parent=4**$round_num+$i/4
# child=index for this bundle of ciphers
child=4*4**$round_num+$i
if ${ciphers_found[parent]}; then
ciphers_to_test=""
end_of_bundle=$i*$bundle_size+$bundle_size
[[ $end_of_bundle -gt $nr_ciphers ]] && end_of_bundle=$nr_ciphers
for (( j=i*bundle_size; j<end_of_bundle; j++ )); do
ciphers_to_test="${ciphers_to_test}:${ciph[j]}"
done
ciphers_found[child]=false
$OPENSSL s_client -cipher "${ciphers_to_test:1}" $proto $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE </dev/null
sclient_connect_successful "$?" "$TMPFILE"
sclient_success=$?
if [[ $sclient_success -ne 0 ]] && ! "$SHOW_EACH_C"; then
continue # no successful connect AND not verbose displaying each cipher
[[ "$?" -eq 0 ]] && ciphers_found[child]=true
else
# No need to test, since test of parent demonstrated none of these ciphers work.
ciphers_found[child]=false
fi
normalize_ciphercode "$hexcode"
if [[ $kx == "Kx=ECDH" ]] || [[ $kx == "Kx=DH" ]] || [[ $kx == "Kx=EDH" ]]; then
# If this is a "leaf" of the test tree, then print out the results.
if [[ $bundle_size -eq 1 ]] && ( ${ciphers_found[child]} || "$SHOW_EACH_C"); then
export=${export2[i]}
normalize_ciphercode "${hexcode[i]}"
if [[ ${kx[i]} == "Kx=ECDH" ]] || [[ ${kx[i]} == "Kx=DH" ]] || [[ ${kx[i]} == "Kx=EDH" ]]; then
if ${ciphers_found[child]}; then
dhlen=$(read_dhbits_from_file "$TMPFILE" quiet)
kx="$kx $dhlen"
kx[i]="${kx[i]} $dhlen"
fi
neat_list "$HEXC" "$ciph" "$kx" "$enc"
fi
neat_list "$HEXC" "${ciph[i]}" "${kx[i]}" "${enc[i]}"
available="available"
if "$SHOW_EACH_C"; then
if [[ $sclient_success -eq 0 ]]; then
if ${ciphers_found[child]}; then
pr_cyan " available"
else
out " not a/v"
available="not a/v"
fi
fi
if "$SHOW_SIGALGO"; then
if "$SHOW_SIGALGO" && ${ciphers_found[child]}; then
$OPENSSL x509 -noout -text -in $TMPFILE | awk -F':' '/Signature Algorithm/ { print $2 }' | head -1
else
outln
fi
id="cipher$proto"
id+="_$HEXC"
fileout "$id" "INFO" "$proto_text $(neat_list "$HEXC" "$ciph" "$kx" "$enc") $available"
fileout "$id" "INFO" "$proto_text $(neat_list "$HEXC" "${ciph[i]}" "${kx[i]}" "${enc[i]}") $available"
fi
done
round_num=round_num+1
done
done
tmpfile_handle $FUNCNAME.txt
done
done
return 0
}