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[Python-Dev] Remove tempfile.mktemp()

Sebastian Rittau srittau at rittau.biz
Tue Mar 19 12:44:19 EDT 2019 
Am 19.03.19 um 17:23 schrieb Giampaolo Rodola':
> @Sebastian
>> If there are valid use cases for mktemp(), I recommend renaming
>> it to mkname_unsafe() or something equally obvious.
> I'm -1 about adding an alias (there should be one and preferably only
> one way to do it). Also mkstemp() and mkdtemp() are somewhat poorly
> named IMO, but I wouldn't add an alias for them either.
>
Just to clarify: I was not suggesting creating an alias, I was suggesting
renaming the function, but keeping the old name for a normal
deprecation cycle.

But I had another thought: If I understand correctly, the exploitability
of mktemp() relies on the fact that between determining whether the
file exists and creation an attacker can create the file themselves.
Couldn't this problem be solved by generating a filename of sufficient
length using the secrets module? This way the filename should be
"unguessable" and safe.

  - Sebastian
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