md: protect MD entry points with CriticalSection

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CardDeleteContext may be called at any time, interrupting any ongoing
operation with the same PCARD_DATA. This leads to a race condition when
CardDeleteContext deletes, for example, the sc_context_t which the
interrupted call still wants to access. We have seen and fixed this
problem in https://github.com/OpenSC/OpenSC/issues/973 specifically for
the PIN entry process, however, it also applies to all other calls to
the md.

The new implementation removes the need for global data in the md.

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This commit is contained in:

Frank Morgner 2017-11-21 13:20:02 +01:00

parent 9583d3b650

commit d0d9b974a7

1 changed files with 461 additions and 346 deletions

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src/minidriver/minidriver.c

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