LittleNellie/cipherscan
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check if certificate used by server is trused

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Use system trust anchors to check if certificate chain used by server
is actually valid.
This commit is contained in:
Hubert Kario 2014-04-05 19:36:51 +02:00
parent 946cc6a9ac
commit f04567d40e
1 changed files with 22 additions and 6 deletions
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28
cipherscan
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@ -8,6 +8,10 @@
DOBENCHMARK=0 DOBENCHMARK=0
BENCHMARKITER=30 BENCHMARKITER=30
OPENSSLBIN="$(dirname $0)/openssl" OPENSSLBIN="$(dirname $0)/openssl"
CACERTS=${CACERTS:-/etc/pki/tls/certs/ca-bundle.crt}
if [ ! -e "$CACERTS" ]; then
echo "Warning: CA Certificates not found at $CACERTS, export CACERTS variable with location of your trust anchors" 1>&2
fi
CIPHERSUITE="ALL:COMPLEMENTOFALL" CIPHERSUITE="ALL:COMPLEMENTOFALL"
DEBUG=0 DEBUG=0
VERBOSE=0 VERBOSE=0
@ -77,6 +81,12 @@ test_cipher_on_target() {
current_pubkey=0 current_pubkey=0
fi fi
current_sigalg=$(openssl x509 -noout -text 2>/dev/null <<<"$tmp"|grep Signature\ Algorithm | head -n 1 | awk '{print $3}') || current_sigalg="None" current_sigalg=$(openssl x509 -noout -text 2>/dev/null <<<"$tmp"|grep Signature\ Algorithm | head -n 1 | awk '{print $3}') || current_sigalg="None"
grep 'Verify return code: 0 ' <<<"$tmp" >/dev/null
if [ $? -eq 0 ]; then
current_trusted="True"
else
current_trusted="False"
fi
if [ -z $current_sigalg ]; then if [ -z $current_sigalg ]; then
current_sigalg=None current_sigalg=None
fi fi
@ -102,6 +112,7 @@ test_cipher_on_target() {
pfs=$current_pfs pfs=$current_pfs
pubkey=$current_pubkey pubkey=$current_pubkey
sigalg=$current_sigalg sigalg=$current_sigalg
trusted=$current_trusted
# grab the cipher and PFS key size # grab the cipher and PFS key size
done done
# if cipher is empty, that means none of the TLS version worked with # if cipher is empty, that means none of the TLS version worked with
@ -113,13 +124,13 @@ test_cipher_on_target() {
# if cipher contains NONE, the cipher wasn't accepted # if cipher contains NONE, the cipher wasn't accepted
elif [ "$cipher" == '(NONE) ' ]; then elif [ "$cipher" == '(NONE) ' ]; then
result="$cipher $protocols $pubkey $sigalg $pfs" result="$cipher $protocols $pubkey $sigalg $trusted $pfs"
verbose "handshake failed, server returned ciphersuite '$result'" verbose "handshake failed, server returned ciphersuite '$result'"
return 1 return 1
# the connection succeeded # the connection succeeded
else else
result="$cipher $protocols $pubkey $sigalg $pfs" result="$cipher $protocols $pubkey $sigalg $trusted $pfs"
verbose "handshake succeeded, server returned ciphersuite '$result'" verbose "handshake succeeded, server returned ciphersuite '$result'"
return 0 return 0
fi fi
@ -152,7 +163,11 @@ bench_cipher() {
get_cipher_pref() { get_cipher_pref() {
[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.' [ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
local ciphersuite="$1" local ciphersuite="$1"
local sslcommand="$OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $ciphersuite" if [ -e $CACERTS ]; then
local sslcommand="$OPENSSLBIN s_client -CAfile $CACERTS $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
else
local sslcommand="$OPENSSLBIN s_client $SCLIENTARGS -connect $TARGET -cipher $ciphersuite"
fi
verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'" verbose "Connecting to '$TARGET' with ciphersuite '$ciphersuite'"
test_cipher_on_target "$sslcommand" test_cipher_on_target "$sslcommand"
local success=$? local success=$?
@ -183,9 +198,9 @@ display_results_in_terminal() {
done done
if [ $DOBENCHMARK -eq 1 ]; then if [ $DOBENCHMARK -eq 1 ]; then
header="prio ciphersuite protocols pubkey_size signature_algoritm pfs_keysize avg_handshake_microsec" header="prio ciphersuite protocols pubkey_size signature_algoritm trusted pfs_keysize avg_handshake_microsec"
else else
header="prio ciphersuite protocols pubkey_size signature_algorithm pfs_keysize" header="prio ciphersuite protocols pubkey_size signature_algorithm trusted pfs_keysize"
fi fi
ctr=0 ctr=0
for result in "${results[@]}"; do for result in "${results[@]}"; do
@ -208,7 +223,8 @@ display_results_in_json() {
echo -n "\"protocols\":[\"$(echo $cipher|awk '{print $2}'|sed 's/,/","/g')\"]," echo -n "\"protocols\":[\"$(echo $cipher|awk '{print $2}'|sed 's/,/","/g')\"],"
echo -n "\"pubkey\":[\"$(echo $cipher|awk '{print $3}'|sed 's/,/","/g')\"]," echo -n "\"pubkey\":[\"$(echo $cipher|awk '{print $3}'|sed 's/,/","/g')\"],"
echo -n "\"sigalg\":[\"$(echo $cipher|awk '{print $4}'|sed 's/,/","/g')\"]," echo -n "\"sigalg\":[\"$(echo $cipher|awk '{print $4}'|sed 's/,/","/g')\"],"
pfs=$(echo $cipher|awk '{print $5}') echo -n "\"trusted\":\"$(echo $cipher|awk '{print $5}'|sed 's/,/","/g')\","
pfs=$(echo $cipher|awk '{print $6}')
[ "$pfs" == "" ] && pfs="None" [ "$pfs" == "" ] && pfs="None"
echo -n "\"pfs\":\"$pfs\"}" echo -n "\"pfs\":\"$pfs\"}"
ctr=$((ctr+1)) ctr=$((ctr+1))