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-rw-r--r--src/cryptography/x509.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index 87028be1..2e2e8512 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -148,6 +148,11 @@ class NameAttribute(object):
"oid argument must be an ObjectIdentifier instance."
)
+ if not isinstance(value, six.text_type):
+ raise TypeError(
+ "value argument must be a text type."
+ )
+
self._oid = oid
self._value = value