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Improve compatibility with LibreSSL

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Older versions of LibreSSL that do not support TLS 1.3 only include a small list of curves in the supported_groups extension by default, so need to retry with curves explicitly defined even with versions of $OPENSSL that do not support TLS 1.3.
This commit is contained in:
David Cooper
2022-04-08 09:08:06 -04:00
parent dd35be2e4b
commit ac662f8699
1 changed files with 3 additions and 4 deletions
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testssl.sh
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@@ -10328,18 +10328,17 @@ run_fs() {
sclient_success=$?
[[ $sclient_success -eq 0 ]] && [[ $(grep -ac "BEGIN CERTIFICATE" $TMPFILE) -eq 0 ]] && sclient_success=1
# Sometimes a TLS 1.3 ClientHello will fail, but a TLS 1.2 ClientHello will succeed. See #2131.
if [[ $sclient_success -ne 0 ]] && "$HAS_TLS13"; then
if [[ $sclient_success -ne 0 ]]; then
# By default, OpenSSL 1.1.1 and above only include a few curves in the ClientHello, so in order
# to test all curves, the -curves option must be added. In addition, OpenSSL limits the number of
# curves that can be specified to 28. So, if more than 28 curves are supported, then the curves must
# be tested in batches.
curves_list1="$(strip_trailing_space "$(strip_leading_space "$OSSL_SUPPORTED_CURVES")")"
curves_list1="${curves_list1// / }"
if [[ "$(count_words "$OSSL_SUPPORTED_CURVES")" -le 28 ]]; then
curves_list1="$(strip_trailing_space "$(strip_leading_space "$OSSL_SUPPORTED_CURVES")")"
curves_list1="${curves_list1// /:}"
else
# Place the first 28 supported curves in curves_list1 and the remainder in curves_list2.
curves_list1="$(strip_trailing_space "$(strip_leading_space "$OSSL_SUPPORTED_CURVES")")"
curves_list1="${curves_list1// / }"
curves_list2="${curves_list1#* * * * * * * * * * * * * * * * * * * * * * * * * * * * }"
curves_list1="${curves_list1%$curves_list2}"
curves_list1="$(strip_trailing_space "$curves_list1")"