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-rw-r--r--util/x509.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/x509.lua b/util/x509.lua
index c4001ecb..82f8285d 100644
--- a/util/x509.lua
+++ b/util/x509.lua
@@ -238,7 +238,7 @@ local function get_identities(cert) --> set of names
local dn = subject[i];
if dn.oid == oid_commonname then
local name = nameprep(dn.value);
- if name then
+ if name and idna_to_ascii(name) then
names[name] = true;
end
end