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The hashing algorithm could be missing or blocked by a strict crypto
policy.
If 'openssl' is True, then the decorator checks that OpenSSL provides
the algorithm. Otherwise the check falls back to built-in
implementations. The usedforsecurity flag is passed to the constructor.
ValueError: [digital envelope routines: EVP_DigestInit_ex] disabled for FIPS
ValueError: unsupported hash type md4
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