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-rw-r--r--src/cryptography/hazmat/backends/openssl/backend.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index 52b5abcf..767605c0 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -153,6 +153,7 @@ def _encode_subject_alt_name(backend, san):
gn.type = backend._lib.GEN_DNS
ia5 = backend._lib.ASN1_IA5STRING_new()
assert ia5 != backend._ffi.NULL
+ # TODO: GC?
value = idna.encode(alt_name.value)
res = backend._lib.ASN1_STRING_set(ia5, value, len(value))
assert res == 1