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