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Get a native string type representing of the given CFFI ``char*`` object.
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Convert an OpenSSL library failure into a Python exception.
When a call to the native OpenSSL library fails, this is usually signalled
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obtain these error codes and textual error messages.
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Convert a Python path to a :py:class:`bytes` for the path which can be
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If ``obj`` is text, emit a warning that it should be bytes instead and try
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