Add google-endpoints to third_party/.

third_party/google-endpoints/pyasn1/codec/der/encoder.py

+# DER encoder
+from pyasn1.type import univ
+from pyasn1.codec.cer import encoder
+from pyasn1 import error
+
+class SetOfEncoder(encoder.SetOfEncoder):
+    def _cmpSetComponents(self, c1, c2):
+        tagSet1 = isinstance(c1, univ.Choice) and \
+                  c1.getEffectiveTagSet() or c1.getTagSet()
+        tagSet2 = isinstance(c2, univ.Choice) and \
+                  c2.getEffectiveTagSet() or c2.getTagSet()        
+        return cmp(tagSet1, tagSet2)
+
+tagMap = encoder.tagMap.copy()
+tagMap.update({
+    # Overload CER encoders with BER ones (a bit hackerish XXX)
+    univ.BitString.tagSet: encoder.encoder.BitStringEncoder(),
+    univ.OctetString.tagSet: encoder.encoder.OctetStringEncoder(),
+    # Set & SetOf have same tags
+    univ.SetOf().tagSet: SetOfEncoder()
+})
+
+typeMap = encoder.typeMap
+
+class Encoder(encoder.Encoder):
+    supportIndefLength = False
+    def __call__(self, client, defMode=True, maxChunkSize=0):
+        if not defMode:
+            raise error.PyAsn1Error('DER forbids indefinite length mode')
+        return encoder.Encoder.__call__(self, client, defMode, maxChunkSize)
+
+encode = Encoder(tagMap, typeMap)