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.venv2/Lib/site-packages/pyasn1/codec/der/encoder.py

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+#
+# This file is part of pyasn1 software.
+#
+# Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
+# License: https://pyasn1.readthedocs.io/en/latest/license.html
+#
+import warnings
+
+from pyasn1 import error
+from pyasn1.codec.cer import encoder
+from pyasn1.type import univ
+
+__all__ = ['Encoder', 'encode']
+
+
+class SetEncoder(encoder.SetEncoder):
+    @staticmethod
+    def _componentSortKey(componentAndType):
+        """Sort SET components by tag
+
+        Sort depending on the actual Choice value (dynamic sort)
+        """
+        component, asn1Spec = componentAndType
+
+        if asn1Spec is None:
+            compType = component
+        else:
+            compType = asn1Spec
+
+        if compType.typeId == univ.Choice.typeId and not compType.tagSet:
+            if asn1Spec is None:
+                return component.getComponent().tagSet
+            else:
+                # TODO: move out of sorting key function
+                names = [namedType.name for namedType in asn1Spec.componentType.namedTypes
+                         if namedType.name in component]
+                if len(names) != 1:
+                    raise error.PyAsn1Error(
+                        '%s components for Choice at %r' % (len(names) and 'Multiple ' or 'None ', component))
+
+                # TODO: support nested CHOICE ordering
+                return asn1Spec[names[0]].tagSet
+
+        else:
+            return compType.tagSet
+
+
+TAG_MAP = encoder.TAG_MAP.copy()
+
+TAG_MAP.update({
+    # Set & SetOf have same tags
+    univ.Set.tagSet: SetEncoder()
+})
+
+TYPE_MAP = encoder.TYPE_MAP.copy()
+
+TYPE_MAP.update({
+    # Set & SetOf have same tags
+    univ.Set.typeId: SetEncoder()
+})
+
+
+class SingleItemEncoder(encoder.SingleItemEncoder):
+    fixedDefLengthMode = True
+    fixedChunkSize = 0
+
+    TAG_MAP = TAG_MAP
+    TYPE_MAP = TYPE_MAP
+
+
+class Encoder(encoder.Encoder):
+    SINGLE_ITEM_ENCODER = SingleItemEncoder
+
+
+#: Turns ASN.1 object into DER octet stream.
+#:
+#: Takes any ASN.1 object (e.g. :py:class:`~pyasn1.type.base.PyAsn1Item` derivative)
+#: walks all its components recursively and produces a DER octet stream.
+#:
+#: Parameters
+#: ----------
+#: value: either a Python or pyasn1 object (e.g. :py:class:`~pyasn1.type.base.PyAsn1Item` derivative)
+#:     A Python or pyasn1 object to encode. If Python object is given, `asnSpec`
+#:     parameter is required to guide the encoding process.
+#:
+#: Keyword Args
+#: ------------
+#: asn1Spec:
+#:     Optional ASN.1 schema or value object e.g. :py:class:`~pyasn1.type.base.PyAsn1Item` derivative
+#:
+#: Returns
+#: -------
+#: : :py:class:`bytes`
+#:     Given ASN.1 object encoded into BER octet-stream
+#:
+#: Raises
+#: ------
+#: ~pyasn1.error.PyAsn1Error
+#:     On encoding errors
+#:
+#: Examples
+#: --------
+#: Encode Python value into DER with ASN.1 schema
+#:
+#: .. code-block:: pycon
+#:
+#:    >>> seq = SequenceOf(componentType=Integer())
+#:    >>> encode([1, 2, 3], asn1Spec=seq)
+#:    b'0\t\x02\x01\x01\x02\x01\x02\x02\x01\x03'
+#:
+#: Encode ASN.1 value object into DER
+#:
+#: .. code-block:: pycon
+#:
+#:    >>> seq = SequenceOf(componentType=Integer())
+#:    >>> seq.extend([1, 2, 3])
+#:    >>> encode(seq)
+#:    b'0\t\x02\x01\x01\x02\x01\x02\x02\x01\x03'
+#:
+encode = Encoder()
+
+def __getattr__(attr: str):
+    if newAttr := {"tagMap": "TAG_MAP", "typeMap": "TYPE_MAP"}.get(attr):
+        warnings.warn(f"{attr} is deprecated. Please use {newAttr} instead.", DeprecationWarning)
+        return globals()[newAttr]
+    raise AttributeError(attr)