35 lines
946 B
Python
35 lines
946 B
Python
import collections
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import json
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from hashlib import sha256
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def canonicalize(json_obj):
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"""This function canonicalizes a Python object that will be serialized as JSON.
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Args:
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json_obj (object): the Python object that will later be serialized as JSON.
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Returns:
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object: json_obj now sorted to its canonical form.
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"""
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if isinstance(json_obj, collections.MutableMapping):
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sorted_obj = sorted({key: canonicalize(val) for key, val in json_obj.items()}.items())
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return collections.OrderedDict(sorted_obj)
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elif isinstance(json_obj, (list, tuple)):
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return [canonicalize(val) for val in json_obj]
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return json_obj
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def canonical_kid(jwk):
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"""This function returns the SHA256 hash of a canonical JWK.
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Args:
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jwk (object): the JWK for which a kid will be generated.
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Returns:
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string: the unique kid for the given JWK.
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"""
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return sha256(json.dumps(canonicalize(jwk), separators=(',', ':'))).hexdigest()
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