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PKey objects can now be used as context managers, in which case the
key handle will be closed when the block exits.
HSM.pkey_find() now returns a generator which will iterate through the
full set of results, making additional RPC calls as necessary.
NIST ECDSA test vector test refactored to remove duplicated code.
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The debugging code was for tracking down what turned out to be a race
condition in the Alpha's flash driver code (see sw/stm32); much of
this was temporary, and will be removed in a (near) future commit, but
some of the techniques were useful and belong in the repository in
case we need to pull them back for something similar in the future.
hal_ks_index_fsck() attempts to diagnose all the things I found wrong
in the ks_flash index after one long series of errors. As presently
written, it doesn't attempt to fix anything, just diagnose errors: the
intent is that we can call this, before and after every modification
if necessary, to poinpoint exactly which calls introduce errors. Once
things stablize a bit, we may want to crank down the number of calls
to this (it's a bit expensive, since it checks the entire index), and
perhaps add the ability to clean up whatever errors it might find; the
latter might be a good candidate for a CLI command.
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This is more complicated than I'd have liked, because the PKCS #11
semantics are (much) more complicated than just "are you logged in?"
New code passes basic testing with libhal.py and the PKCS #11 unit
tests, but there are still unexplored corner cases to be checked.
Private token objects remain simple. Code which does not need PKCS
HAL_KEY_FLAG_TOKEN and avoid HAL_KEY_FLAG_PUBLIC.
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In retrospect it's obvious that this never needed to be an
input/output argument, as its value will always be the same as the
last value in the returned array. Doh. So simplify the RPC and call
sequence slightly by removing the unnecessary output value.
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Intent is to make it easier just to paste C enum definitions into
Python code and have the right thing happen, to simplify keeping C and
Python definitions in sync.
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Using a context manager allows us to write the individual RPC methods
fairly legibly, while still enforcing xdrlib.Unpacker.done() logic.
Python doesn't really have enums in the sense that C does, and many
people have put entirely too much skull sweat into trying to invent
the Most Pythonic reimplementation of the enum concept, but an int
subclass with a few extra methods is close enough for our purposes.
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