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-rw-r--r--src/cryptography/hazmat/backends/openssl/x509.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py
index 8b77a11b..5d47c5ea 100644
--- a/src/cryptography/hazmat/backends/openssl/x509.py
+++ b/src/cryptography/hazmat/backends/openssl/x509.py
@@ -225,6 +225,9 @@ class _Certificate(object):
asn1_string = self._backend._ffi.cast(
"ASN1_OCTET_STRING *", asn1_string
)
+ asn1_string = self._backend._ffi.gc(
+ asn1_string, self._backend._lib.ASN1_OCTET_STRING_free
+ )
return x509.SubjectKeyIdentifier(
self._backend._ffi.buffer(asn1_string.data, asn1_string.length)[:]
)