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- import hashlib
- # Compat wrapper to always include the `usedforsecurity=...` parameter,
- # which is only added from Python 3.9 onwards.
- # We use this flag to indicate that we use `md5` hashes only for non-security
- # cases (our ETag checksums).
- # If we don't indicate that we're using MD5 for non-security related reasons,
- # then attempting to use this function will raise an error when used
- # environments which enable a strict "FIPs mode".
- #
- # See issue: https://github.com/encode/starlette/issues/1365
- try:
- # check if the Python version supports the parameter
- # using usedforsecurity=False to avoid an exception on FIPS systems
- # that reject usedforsecurity=True
- hashlib.md5(b"data", usedforsecurity=False) # type: ignore[call-arg]
- def md5_hexdigest(
- data: bytes, *, usedforsecurity: bool = True
- ) -> str: # pragma: no cover
- return hashlib.md5( # type: ignore[call-arg]
- data, usedforsecurity=usedforsecurity
- ).hexdigest()
- except TypeError: # pragma: no cover
- def md5_hexdigest(data: bytes, *, usedforsecurity: bool = True) -> str:
- return hashlib.md5(data).hexdigest()
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