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diff --git a/pyasn1_modules/rfc3770.py b/pyasn1_modules/rfc3770.py
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+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley with assistance from asn1ate v.0.6.0.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Certificate Extensions and Attributes Supporting Authentication
+#   in PPP and Wireless LAN Networks
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc3770.txt
+# https://www.rfc-editor.org/errata/eid234
+#
+
+from pyasn1.type import constraint
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+MAX = float('inf')
+
+
+# Extended Key Usage Values
+
+id_kp_eapOverLAN = univ.ObjectIdentifier('1.3.6.1.5.5.7.3.14')
+
+id_kp_eapOverPPP = univ.ObjectIdentifier('1.3.6.1.5.5.7.3.13')
+
+
+# Wireless LAN SSID Extension
+
+id_pe_wlanSSID = univ.ObjectIdentifier('1.3.6.1.5.5.7.1.13')
+
+
+class SSID(univ.OctetString):
+    pass
+
+SSID.subtypeSpec = constraint.ValueSizeConstraint(1, 32)
+
+
+class SSIDList(univ.SequenceOf):
+    pass
+
+SSIDList.componentType = SSID()
+SSIDList.subtypeSpec=constraint.ValueSizeConstraint(1, MAX)
+
+
+# Wireless LAN SSID Attribute Certificate Attribute
+# Uses same syntax as the certificate extension: SSIDList
+# Correction for https://www.rfc-editor.org/errata/eid234
+
+id_aca_wlanSSID = univ.ObjectIdentifier('1.3.6.1.5.5.7.10.7')
+
+
+# Map of Certificate Extension OIDs to Extensions
+# To be added to the ones that are in rfc5280.py
+
+_certificateExtensionsMap = {
+    id_pe_wlanSSID: SSIDList(),
+}
+
+rfc5280.certificateExtensionsMap.update(_certificateExtensionsMap)
+
+
+# Map of AttributeType OIDs to AttributeValue added to the
+# ones that are in rfc5280.py
+
+_certificateAttributesMapUpdate = {
+    id_aca_wlanSSID: SSIDList(),
+}
+
+rfc5280.certificateAttributesMap.update(_certificateAttributesMapUpdate)