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2016-10-07Checkpoint along the way to adding keystore attribute support.Rob Austein
This is mostly to archive a commit where PKCS #11 "make test" still works after converting the ks_volatile code to use SDRAM allocated at startup instead of (large) static variables. The attribute code itself is incomplete at this point.
2016-09-30Multi-block object support in keystore.Rob Austein
The main reason for supporting multi-block objects is to allow the PKCS #11 code to attach more attributes than will fit comfortably in a single flash block. This may turn out to be unnecessary once we've fleshed out the attribute storage and retrieval code; if so, we can simplify the code, but this way the keystore won't impose arbitrary (and somewhat inscrutable) size limits on PKCS #11 attributes for large keys. This snapshot passes light testing (PKCS #11 "make test" runs), but the tombstone recovery code in ks_init() is a bit involved, and needs more testing with simulated failures (probably induced under GDB).
2016-09-27Redesign ks_flash block header.Rob Austein
* block_status is now a separate field from block_type, rather than being a composite value. * block_status is checked directly for allowed values in block_read(), and is excluded from the CRC, simplifying the tombstone logic and removing the need for a second CRC field. * Added header fields to allow for objects too large to fit in a single block (8192-bit RSA keys, any key with enough opaque attributes attached). So far this is just the header changes, it's not (yet) full support for multi-block objects.
2016-09-27Write updated PIN block before updating index.Rob Austein
Order of operations is tricky when updating flash blocks, because the process is not atomic and we want to leave the index in a consistent state if something fails.
2016-09-27Fix swapped memmove() arguments in hal_ks_index_replace().Rob Austein
2016-09-27Add hal_ks_index_replace().Rob Austein
2016-09-26More ks_flash cleanup.Rob Austein
block_read() no longer needs `fast` argument. block_zero() now just zeros first page of block.
2016-09-26Rewrite block_erase_maybe() to run the "maybe" check in constant time.Rob Austein
Running this check in constant time probably isn't necessary, but it plugs a (somewhat far-fetched) timing leak and is easy enough. While we're at this, we also skip the CRC check, which is irrelevant here.
2016-09-23Use subsectors instead of sectors in keystore.Rob Austein
2016-09-16Debug new ks_flash code.Rob Austein
2016-09-16Revised ks_flash. Compiles, not yet tested.Rob Austein
2016-09-13Cleanup prior to rewriting ks_flash.c.Rob Austein
Whack masterkey code to meet libhal coding standards, such as they are. Started layout of new ks_flash data structures but no changes to functions or flash usage yet. MKM initialization from flash placed under compile-time conditional with warning because it's a dangerous kludge that should go away. Started getting rid of obsolete keystore code; ks_mmap.c kept for now, until I get around to merging the useful bits into ks_volatile.
2016-09-12CRC-32 code for use in ks_flash, stm32 DFU, possibly elsewhere.Rob Austein
This is an open source C99 CRC-32 implementation generated by pycrc, see notes in source on copyright status and pycrc options used. crc32.c contains two different implementations of the CRC-32 algorithm with the same API, one optimized for speed, the other optimized for much smaller code space at the expense of speed. We use the fast implementation by default, but maybe the small implementation will be useful, eg, in the bootloader. Remove the extra later if this turns out to have been a waste of time.
2016-09-12Doh, allow keystore reinitialization after unclean reboot.Rob Austein
2016-09-11Explicit initialization of keystore drivers instead of guessing.Rob Austein
2016-09-09Portable fix for ks_find() fencepost error.Rob Austein
Binary search of an array is a notorious example of a simple algorithm which is hard to get exactly right. The variant we're using is nice because it automatically computes the correct insertion point when a key doesn't exist, but runs into one of the portability corner cases of signed integer arithemtic in C. Rather than leave a landmine waiting to explode if somebody builds this code on a platform where (-1 >> 1) != -1, we test for the corner case explictly and accept the miniscule performance hit (which will be lost in other noise anyway).
2016-09-09Rewrite ks_volatile driver to use new ks_index infrastructure.Rob Austein
2016-09-09Fencepost error in ks_find().Rob Austein
2016-09-09Missed a few instances of type-based key naming in keystore drivers.Rob Austein
2016-09-09Simplify hal_rpc_pkey_find() by removing `type` argument.Rob Austein
Now that key names are UUIDs generated by the HSM, there's no real need to specify type key type when looking up a key, and removing the `type` argument allows a few simplifications of both the internal keystore API and of client code calling the public RPC API.
2016-09-08New keystore index internal API. Compiles, not yet integrated or tested.Rob Austein
2016-09-03Plug pkey handle leak.Rob Austein
New keystore code requires slightly different cleanup to avoid leaking pkey handle table slots. Pricetag for reducing the amount of data duplicated between pkey and keystore layers.
2016-09-02Test both in-memory and on-flash keystores.Rob Austein
2016-09-02Fencepost error in hal_uuid_format().Rob Austein
2016-09-02Code to convert between text and internal forms of UUIDs.Rob Austein
Includes a few cosmetic fixes to address gcc format string warnings and git trailing whitespace warnings.
2016-09-01Move in-memory keystore from client to server. Whack with club until compiles.Rob Austein
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.
2016-09-01Revised keystore API, part one. Not usable yet.Rob Austein
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.
2016-08-23Merge branch 'master' of git.cryptech.is:sw/libhalPaul Selkirk
2016-08-16Lock RPC device after opening it.Rob Austein
Current design of the RPC protocol assumes that there is exactly one client speaking directly to the HSM via the RPC channel, whether that single client really is single or is a multiplexing daemon. PKCS #11 mutexes won't help here, so using flock(2) to grab an exclusive "advisory" lock on the RPC file descriptor is the simplest solution.
2016-08-10Reset table of cores, e.g. after resetting FPGA from CLI.Paul Selkirk
2016-08-10Merge branch 'resource_management'Paul Selkirk
2016-08-10Merge branch 'master' of https://git.cryptech.is/sw/libhalRob Austein
2016-08-10Mixed-mode pkey sign and verify must construct DigestInfo for PKCS #1.5.Rob Austein
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.
2016-07-12Fix checking for multiple errors in one operation.Paul Selkirk
err = hal_foo() || hal_bar() || hal_baz; maps all errors to 1 (HAL_ERROR_BAD_ARGUMENTS).
2016-07-12Make probe_cores deal with an unconfigured FPGA (and come back later).Paul Selkirk
See, reading from an unconfigured FPGA returns all-1, while reading from empty cores on a configured FPGA returns all-0. The consequence of this is that the HSM was probing the FPGA once on startup, filling its core table with 0xff, rendering the FPGA useless. Along the way, I put the FPGA core table in static memory, rather than malloc'ing it, because that's not so good in an embedded environment. But I kept the linked list, because that at least tells us what to do if HAL_STATIC_CORE_STATE_BLOCKS is 0.
2016-07-08Merge branch 'master' of https://git.cryptech.is/sw/libhal.gitRob Austein
2016-07-08Enable software hash cores on all platforms, for now, anyway.Rob Austein
2016-07-08Don't reuse local variable in check() macro.Paul Selkirk
2016-07-07Check and propagate XDR error codes, to detect bad request packets.Paul Selkirk
2016-07-07Fix buffer overflow check.Rob Austein
2016-07-07Drop RPC response message if the opcode doesn't match what we sent.Rob Austein
2016-07-07Use environment variables rather than wired-in defaults in cryptech_rpcd.Rob Austein
This change allows the RPC MUX daemon to use the same environment variable scheme to configure the RPC device and line speed as the stand-alone RPC client code does, the only difference being that the daemon, being an independent program, still allows one to override these settings from the command line.
2016-07-07Change names of RPC client environment variables to something a bit less ↵Rob Austein
obscure.
2016-07-06Previous "fix" to speed setting didn't compile on OSX.Rob Austein
2016-07-06Use the second sha256 core, if available, for pbkdf2.Paul Selkirk
This is a hopefully temporary stopgap, in lieu of proper resource management and/or sharing of cores between threads.
2016-07-06Add a couple more testsPaul Selkirk
2016-07-06Fix speed setting?Paul Selkirk
2016-07-06Return an intelligent error from hal_ks_get_kek.Paul Selkirk
2016-07-06Belatedly adjust hal_io_read/write to the new flat addressing architecture.Paul Selkirk
2016-07-05Attempt to add resource management, for multiple cores of the same type.Paul Selkirk
Find a suitable core, and mark it busy. Don't forget to release it as soon as you're done. This has a knock-on effect of un-const'ing core arguments and struct fields in a lot of places, and it moves some core checks around.