| commit | 4414874f1fb04a44928afd6f0cd8753b05b2d080 | [log] [tgz] |
|---|---|---|
| author | David Benjamin <davidben@google.com> | Sat Jun 17 13:20:59 2017 -0400 |
| committer | Steven Valdez <svaldez@google.com> | Tue Jun 20 19:37:05 2017 +0000 |
| tree | 171b0258e54f06a7ef3d4fed9c83916a3cad1e00 | |
| parent | babcac1c6f64ccfbfc1c8305d2fc0d6016cfbe02 [diff] |
Simplify ssl_private_key_* state machine points.
The original motivation behind the sign/complete split was to avoid
needlessly hashing the input on each pass through the state machine, but
we're payload-based now and, in all cases, the payload is either cheap
to compute or readily available. (Even the hashing worry was probably
unnecessary.)
Tweak ssl_private_key_{sign,decrypt} to automatically call
ssl_private_key_complete as needed and take advantage of this in the
handshake state machines:
- TLS 1.3 signing now computes the payload each pass. The payload is
small and we're already allocating a comparable-sized buffer each
iteration to hold the signature. This shouldn't be a big deal.
- TLS 1.2 decryption code still needs two states due to reading the
message (fixed in new state machine style), but otherwise it just
performs cheap idempotent tasks again. The PSK code is reshuffled to
guarantee the callback is not called twice (though this was impossible
anyway because we don't support RSA_PSK).
- TLS 1.2 CertificateVerify signing is easy as the transcript is readily
available. The buffer is released very slightly later, but it
shouldn't matter.
- TLS 1.2 ServerKeyExchange signing required some reshuffling.
Assembling the ServerKeyExchange parameters is moved to the previous
state. The signing payload has some randoms prepended. This is cheap
enough, but a nuisance in C. Pre-prepend the randoms in
hs->server_params.
With this change, we are *nearly* rid of the A/B => same function
pattern.
BUG=128
Change-Id: Iec4fe0be7cfc88a6de027ba2760fae70794ea810
Reviewed-on: https://boringssl-review.googlesource.com/17265
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.
Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.
Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.
BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.
Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.
There are other files in this directory which might be helpful: