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-rw-r--r--src/cryptography/hazmat/backends/openssl/decode_asn1.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/decode_asn1.py b/src/cryptography/hazmat/backends/openssl/decode_asn1.py
index 9c2d763e..f178af07 100644
--- a/src/cryptography/hazmat/backends/openssl/decode_asn1.py
+++ b/src/cryptography/hazmat/backends/openssl/decode_asn1.py
@@ -102,7 +102,8 @@ def _decode_general_name(backend, gn):
if parsed.hostname:
hostname = idna.decode(parsed.hostname)
else:
- hostname = ""
+ # There's no IDNA so we can immediately return
+ return x509.UniformResourceIdentifier(data)
if parsed.port:
netloc = hostname + u":" + six.text_type(parsed.port)
else: