This factors the junk drawer of constants into the relevant files.
There are still a few "global" ones left but they can be addressed in a
followup commit.
YubiKey NEOs are legacy YubiKey devices, most of which contain
unpatchable security vulnerabilities.
They have smaller buffer sizes than YK4 and YK5, which necessitates a
whole bunch of conditional gating and buffer size calculations.
Getting rid of them simplifies this logic and allows us to assume
consistent buffer sizes everywhere.
We never tested on NEOs anyway, and looking at the deleted code it seems
it may have been miscalculating the NEO's buffer size!
If someone *really* wants to support NEOs, it shouldn't be that hard to
restore, but the codebase is definitely cleaner without it.
Converts a bag of constant values (`YKPIV_INS_*`) into an enum
representing APDU instruction codes (a.k.a. `ins`).
Among other things, this makes the `Debug` output for `APDU` more human
meaningful, since it can print a text label for the instruction rather
than a code number, which is helpful in trace debugging.
This commit contains a "big bang" refactor/rewrite which does the
following:
- Replaces all `SCard*` FFI calls with the `pcsc` crate, which provides
a safe, portable PC/SC API across Windows, macOS, and Linux
- Refactors the `util` module into modules representing the various
device functions and concepts, e.g. `certificate`, `key`, `mgm`
- Replaces all usage of `libc` with `std` functionality, and in many
places rewriting functionality to use safe code.
- Removes `ykpiv_` from all function names, and `Piv*` from type names.
In 20/20 hindsight I wish I had done this commit more incrementally so
as to make it easier to review. Que sera sera.
However, realistically we need to test all functionality on the device
to ensure that it actually works. Going forward I would like to put
pretty much all of the current code behind an `untested` cargo feature,
and then remove it for each bit of functionality we test.
Switches all of the previous `state->verbose`-gated `eprintln!` calls to
use macros from the `log` crate, trying to map them onto the previous
verbosity levels, more or less following this mapping:
0. off
1. error/info/warn (depending on context)
2. trace
This additionally includes a bunch of logic/branch reformatting (and
occasional missed constants), since getting rid of all the gating on
verbose provided ample opportunities to clean up the code. Hopefully I
didn't break too much in the process!
This commit gets the Rust code to compile! 🎉
Additionally, it fixes all of the commented out code that was failing
translation from C due to the use of unions, namely around the APDU
messages.
It does a fair amount of reformatting around branches, with the net
result hopefully being something actually a bit closer to the C code,
and a straightforward list of `if` statements.
It also removes all of the remaining externs that aren't supposed to be
externs, replacing them with a more straightforward usage of the module
system.
Finally it fixes all errors and warnings (relating to e.g. usage of
uninitialized memory), in addition to most clippy lints! (some have
been explicitly disabled)
All that said, it still doesn't do anything: it needs to be wired up to
a PCSC library first before that will be possible. But hey, it compiles!
Tony Arcieri