32 lines
938 B
Python
32 lines
938 B
Python
import typing as t
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import json
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import hashlib
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from collections import OrderedDict
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from ..util import to_bytes, urlsafe_b64encode
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def calculate_thumbprint(
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value: dict[str, t.Any],
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digest_method: t.Literal["sha256", "sha384", "sha512"] = "sha256",
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) -> str:
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"""Calculate the thumbprint value of a Key, per RFC 7638.
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.. code-block:: python
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from joserfc import jwk
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jwk.thumbprint({
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'kty': 'oct',
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'k': 'sTBpI_oCHSyW-n0exSwhzNHwU9FGRioPauxWA84bnRU',
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})
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# 'DCdRGGDKvhAJgmVlCp6tosc2T9ELtd30S_15vn8bhrI'
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"""
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sorted_fields = sorted(value.keys())
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data = OrderedDict()
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for k in sorted_fields:
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data[k] = value[k]
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json_data = json.dumps(data, ensure_ascii=True, separators=(",", ":"))
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hash_value = hashlib.new(digest_method, to_bytes(json_data))
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digest_data = hash_value.digest()
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return urlsafe_b64encode(digest_data).decode("utf-8")
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