src/aws_encryption_sdk/internal/formatting/deserialize.py [267:275]:
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    header["algorithm"] = _verified_algorithm_from_id(algorithm_id)
    header["message_id"] = message_id

    header["encryption_context"] = deserialize_encryption_context(tee_stream.read(ser_encryption_context_length))

    header["encrypted_data_keys"] = deserialize_encrypted_data_keys(tee_stream, max_encrypted_data_keys)

    (content_type_id,) = unpack_values(">B", tee_stream)
    header["content_type"] = _verified_content_type_from_id(content_type_id)
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src/aws_encryption_sdk/internal/formatting/deserialize.py [309:317]:
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    header["algorithm"] = _verified_algorithm_from_id(algorithm_id)
    header["message_id"] = message_id

    header["encryption_context"] = deserialize_encryption_context(tee_stream.read(ser_encryption_context_length))

    header["encrypted_data_keys"] = deserialize_encrypted_data_keys(tee_stream, max_encrypted_data_keys)

    (content_type_id,) = unpack_values(">B", tee_stream)
    header["content_type"] = _verified_content_type_from_id(content_type_id)
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