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Fixes for various minor issues found while integrating with sw/stm32.
Moving the in-memory keystore (PKCS #11 session objects, etc) from the
client library to the HSM was on the near term to-do list in any case,
doing it now turned out to be the easiest way to solve one of the
build problems.
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Changes to implement a revised keystore API. This code probably won't
even compile properly yet, and almost certainly will not run, but most
of the expected changes are complete at this point. Main points:
* Key names are now UUIDs, and are generated by the HSM, not the client.
* Keystore API no longer assumes that key database is resident in
memory (original API was written on the assumption that the keystore
flash would be mapped into the HSM CPU's address space, but
apparently the board and flash drivers don't really support that).
A few other changes have probably crept in, but the bulk of this
changeset is just following through implications of the above, some of
which percolate all the way back to the public RPC API.
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PKCS #11 expects a DigestInfo rather than a raw digest when passing a
pre-computed digest for PKCS #1.5 signature or verification, so the
rpc_pkey signature and verification calls do too. This requires
special case handling of RSA when the user passes a digest handle in
mixed mode. Annoying, but PKCS #1.5 is weird enoug that there's no
way to avoid some kind of special case handling, this approach has the
advantage of not requiring us to parse and reconstruct the ASN.1, and
is probably what PKCS #11 has trained software to expect in any case.
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client handle in all responses.
This simplies the daemon a little, and means that the directly-connected
serial client uses the same wire format as the daemon. The expense is some
redundant code in rpc_client and rpc_server to process (and throw away)
this extra stuff.
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Note that mixed mode doesn't actually work, because aes_keywrap tries to
hal_io_write to the AES core.
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opcode right.
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Temporary nature of null string as key name is not enforced by the
keystore code, it's just a convention to allow callers to generate a
keypair, obtain the public key, hash that to a Subject Key Identifier
(SKI), and rename the key using the SKI as the new name.
This is a compromise to let us use SKI-based key names in PKCS #11
while keeping the keystore code simple.
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The client wrappers for several RPC calls were not allocating enough
space for all of their arguments. Fixed, and added a bit of syntactic
sugar to make inspection a bit easier to combat the eyes-glazing-over
effect of an entire file full of nearly-identical RPC client stubs.
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Added RPC function to get server version number.
Substantially reworked GNUMakefile with conditionals.
Renamed rpc_*() and xdr_*() to hal_*() for consistency.
Moved hal_io_fmc.c from stm32 repo.
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and dispatch.
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committing now so Paul has a chance to look at the current RPC API.
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public key extraction functions on hold pending ASN.1 cleanup.
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pool of pre-configured state blocks, suitable for an embedded system.
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local hashing with remote pkey.
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