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2018-07-28curve25519-x86_64: tighten the x25519 assemblySamuel Neves
The wide multiplication by 38 in mul_a24_eltfp25519_1w is redundant: (2^256-1) * 121666 / 2^256 is at most 121665, and therefore a 64-bit multiplication can never overflow. Change inspired by Andy Polyakov's OpenSSL implementation. Signed-off-by: Samuel Neves <sneves@dei.uc.pt> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-24qemu: update musl and kernelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-24qemu: show log if process crashesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-24receive: check against proper return value typeJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-18version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-18recieve: disable NAPI busy pollingThomas Gschwantner
This avoids adding one reference per peer to the napi_hash hashtable, as normally done by netif_napi_add(). Since we potentially could have up to 2^20 peers this would make busy polling very slow globally. This approach is preferable to having only a single napi struct because we get one gro_list per peer, which means packets can be combined nicely even if we have a large number of peers. This is also done by gro_cells_init() in net/core/gro_cells.c . Signed-off-by: Thomas Gschwantner <tharre3@gmail.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-18device: destroy workqueue before freeing queueJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-12receive: use gro call instead of plain callJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-11receive: account for zero or negative budgetJason A. Donenfeld
Suggested-by: Thomas Gschwantner <tharre3@gmail.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-08version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-08receive: use NAPI on the receive pathJonathan Neuschäfer
Suggested-by: Jason A. Donenfeld <Jason@zx2c4.com> [Jason: fixed up the flushing of the rx_queue in peer_remove] Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-06qemu: decide debug kernel based on KERNEL_VERSIONJason A. Donenfeld
If KERNEL_VERSION ends in -debug, then automatically set DEBUG_KERNEL If DEBUG_KERNEL is set, now the debug kernel will be built in a separate directory from the normal kernel, so that it's easy to toggle back and forth. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-06qemu: bump default kernel versionJason A. Donenfeld
This fixes DEBUG_KERNEL=yes due to dd275caf4a0d9b219fffe49288b6cc33cd564312 being backported to 4.17.4. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-06selftest: ratelimiter: improve chance of success via retryJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-04receive: styleJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-07-04device: print daddr not saddr in missing peer errorJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-25version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-24compat: more robust ktime backportJason A. Donenfeld
This is needed for frankenkernels, like android-common. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-23global: use fast boottime instead of normal boottimeJason A. Donenfeld
Generally if we're inaccurate by a few nanoseconds, it doesn't matter. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-23global: use ktime boottime instead of jiffiesJason A. Donenfeld
Since this is a network protocol, expirations need to be accounted for, even across system suspend. On real systems, this isn't a problem, since we're clearing all keys before suspend. But on Android, where we don't do that, this is something of a problem. So, we switch to using boottime instead of jiffies. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-22global: fix a few typosJonathan Neuschäfer
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-22simd: add missing headerJason A. Donenfeld
Suggested-by: Shlomi Steinberg <shlomi@shlomisteinberg.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-22poly1305: give linker the correct constant data section sizeJason A. Donenfeld
Otherwise these constants will be merged wrong or excluded, and we'll wind up with wrong calculations. While bfd (the normal kernel linker) doesn't seem to mind, recent versions of gold do bad things. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-22main: test poly1305 before chacha20poly1305Jason A. Donenfeld
Since chacha20poly1305 relies on the correctness of poly1305, it's useful to have a failing poly1305 test first, to better pinpoint what's happening. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-22receive: don't toggle bhJason A. Donenfeld
This had a bad performance impact. We'll probably need to revisit this later, but for now, let's not introduce a regression. Reported-by: Lonnie Abelbeck <lonnie@abelbeck.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-20version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-20poly1305: add missing string.h headerJason A. Donenfeld
Reported-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-19compat: use stabler lkml linksJason A. Donenfeld
This will redirect to whichever archive kernel.org thinks is best. Suggested-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-19ratelimiter: do not allow concurrent init and uninitJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-19ratelimiter: mitigate reference underflowJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-19receive: drop handshake packets if rng is not initializedJason A. Donenfeld
Otherwise it's too easy to trigger cookie reply messages. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-18noise: wait for crng before taking locksJason A. Donenfeld
Otherwise, get_random_bytes_wait gets called from curve25519_generate_secret, and at the same time, a user might use the wg(8) utility, which then wants to grab a read lock for what we're write locking. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-18netlink: maintain static_identity lock over entire private key updateJason A. Donenfeld
We don't want the local private key to not correspond with a precomputed ss or precomputed cookie hash at any intermediate point. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-18noise: take locks for ss precomputationJason A. Donenfeld
Usually this is called from handshake_init, where locking doesn't matter because nothing references it yet, but it's also called when changing the device private key, so it's probably a good thing to not process a handshake with a ss precomputation that's part old and part new. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-17qemu: bump default kernelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-17simd: no need to restore fpu state when no preemptionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-17simd: encapsulate fpu amortization into nice functionsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-16queueing: re-enable preemption periodically to lower latencyJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-16queueing: remove useless spinlocks on scJason A. Donenfeld
Since these are the only consumers, there's no need for locking. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-14chacha20poly1305: use slow crypto on -rt kernels on arm tooJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-13version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-13chacha20poly1305: use slow crypto on -rt kernelsJason A. Donenfeld
In rt kernels, spinlocks call schedule(), which means preemption can't be disabled. The FPU disables preemption. Hence, we can either restructure things to move the calls to kernel_fpu_begin/end to be really close to the actual crypto routines, or we can do the slower lazier solution of just not using the FPU at all on -rt kernels. This patch goes with the latter lazy solution. The reason why we don't place the calls to kernel_fpu_begin/end close to the crypto routines in the first place is that they're very expensive, as it usually involves a call to XSAVE. So on sane kernels, we benefit from only having to call it once. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-06-02chacha20: add missing include to headerJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31version: bump snapshotJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31qemu: bump default versionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31device: do not assume dst is always validJason A. Donenfeld
The new flow offloading feature at the moment does not set the dst. We have a patch pending to fix this upstream, but in the meantime, work around it here. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31poly1305: mips: compute S on flyRené van Dorst
This reduces memory access and the total opaque size. Signed-off-by: René van Dorst <opensource@vdorst.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31chacha20poly1305: test for authtag failureJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31chacha20poly1305: test scattergather functions tooJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-05-31crypto: consistent constificationJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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