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Improvement for testing curves with several openssl / libressl versions 

As noted in #2016 the detection of curves in find_openssl_binary()
copuld be improved.

This commit removes another connect call. Also it corrects the port statement
for LibreSSL-like pre-checks as port 0 generally seems to me better suited.
Inline documentation was added.

It worked so far with openssl 1.0.2, 1.1.1 and 3.0 and LibreSSL 3.4.

This needs to be backported to 3.0.
This commit is contained in:
Dirk Wetter 2021-10-23 18:38:04 +02:00
parent 6251a6c1d6
commit a11bd1585e
1 changed files with 8 additions and 2 deletions
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@ -19303,14 +19303,20 @@ find_openssl_binary() {
OPENSSL_NR_CIPHERS=$(count_ciphers "$(actually_supported_osslciphers 'ALL:COMPLEMENTOFALL' 'ALL')")
if $OPENSSL s_client -curves "${curves_ossl[0]}" -connect $NXCONNECT 2>&1 | grep -aiq "unknown option"; then
# The following statement works with openssl 1.0.2, 1.1.1 and 3.0 as LibreSSL 3.4
if $OPENSSL s_client -curves 2>&1 | grep -aiq "unknown option"; then
# This is e.g. for LibreSSL (tested with version 3.4.1): WSL users will get "127.0.0.1:0" here,
# All other "invalid.:0". We need a port here, in any case!
# The $OPENSSL connect call deliberately fails: when the curve isn't available with
# "getaddrinfo: Name or service not known", newer LibreSSL with "Failed to set groups".
for curve in "${curves_ossl[@]}"; do
$OPENSSL s_client -groups $curve -connect ${NXCONNECT%:*}:8443 2>&1 | grep -Eiaq "Error with command|unknown option|Failed to set groups"
$OPENSSL s_client -groups $curve -connect ${NXCONNECT%:*}:0 2>&1 | grep -Eiaq "Error with command|unknown option|Failed to set groups"
[[ $? -ne 0 ]] && OSSL_SUPPORTED_CURVES+=" $curve "
done
else
HAS_CURVES=true
for curve in "${curves_ossl[@]}"; do
# Same as above, we just don't need a port for invalid.
$OPENSSL s_client -curves $curve -connect $NXCONNECT 2>&1 | grep -Eiaq "Error with command|unknown option"
[[ $? -ne 0 ]] && OSSL_SUPPORTED_CURVES+=" $curve "
done