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OCSP error handling

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This PR improves the handling of error responses when checking status using OCSP. It can handle a few types of errors:

* When the responder just returns an error (e.g., "Responder error: unauthorized").

* When the response cannot be verified (e.g., invalid signature, expired certificate).

* When the response is valid ("Response verify OK"), but there is a problem with the response for the individual certificate (e.g., information is too old, or status is "unknown").
This commit is contained in:
David Cooper 2018-05-24 17:00:27 -04:00 committed by GitHub
parent c21ed3212e
commit feb48c0295
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 12 deletions
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testssl.sh
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@ -1499,7 +1499,7 @@ check_revocation_ocsp() {
local jsonID="$2"
local tmpfile=""
local -i success
local code=""
local response=""
local host_header=""
"$PHONE_OUT" || return 0
@ -1514,30 +1514,41 @@ check_revocation_ocsp() {
$OPENSSL ocsp -no_nonce ${host_header} -url "$uri" \
-issuer $TEMPDIR/hostcert_issuer.pem -verify_other $TEMPDIR/intermediatecerts.pem \
-CAfile $TEMPDIR/intermediatecerts.pem -cert $HOSTCERT -text &> "$tmpfile"
if [[ $? -eq 0 ]] && fgrep -q "Response verify OK" "$tmpfile"; then
if grep -q "$HOSTCERT: good" "$tmpfile"; then
if [[ $? -eq 0 ]] && grep -Fq "Response verify OK" "$tmpfile"; then
response="$(grep -F "$HOSTCERT: " "$tmpfile")"
response="${response#$HOSTCERT: }"
response="${response%\.}"
if [[ "$response" =~ "good" ]]; then
out ", "
pr_svrty_good "not revoked"
fileout "$jsonID" "OK" "not revoked"
elif fgrep -q "$HOSTCERT: revoked" "$tmpfile"; then
elif [[ "$response" =~ "revoked" ]]; then
out ", "
pr_svrty_critical "revoked"
fileout "$jsonID" "CRITICAL" "revoked"
elif [[ $DEBUG -ge 2 ]]; then
outln
cat "$tmpfile"
else
out ", "
pr_warning "error querying OCSP responder"
fileout "$jsonID" "WARN" "$response"
if [[ $DEBUG -ge 2 ]]; then
outln
cat "$tmpfile"
else
out " ($response)"
fi
fi
else
code="$(awk -F':' '/Code/ { print $NF }' $tmpfile)"
[[ -s "$tmpfile" ]] || response="empty ocsp response"
[[ -z "$response" ]] && response="$(awk '/Responder Error:/ { print $3 }' "$tmpfile")"
[[ -z "$response" ]] && grep -Fq "Response Verify Failure" "$tmpfile" && response="unable to verify response"
out ", "
pr_warning "error querying OCSP responder"
[[ -s "$tmpfile" ]] || code="empty ocsp response"
fileout "$jsonID" "WARN" "$code"
fileout "$jsonID" "WARN" "$response"
if [[ $DEBUG -ge 2 ]]; then
outln
[[ -s "$tmpfile" ]] && cat "$tmpfile" || echo "empty ocsp response"
else
out " ($code)"
elif [[ -n "$response" ]]; then
out " ($response)"
fi
fi
}