Enable `ring::agreement` for wasm32 targets using the small
implementation of Curve25519.
Use the small Curve25519 implementation of Curve25519 (and
P-256) for all targets except for Aarch64 and x86-64.
Besides being smaller, the small implementations are likely
more resistant to compiler-introduced side-channels, which
is especially important for the wasm32 virtual machine and
other targets that we don't QA as thoroughly as AAarch64
and x86-64.
Bring in the previously-removed definition of `fe_mul_llt`
from BoringSSL as of commit
8d71d244c0debac4079beeb02b5802fde59b94bd.
Implement `AsRef<[u8]>` for `signature::UnparsedPublicKey`, making it
possible to access the bytes of the public key. For consistency, I did
the same for `agreement::UnparsedPublicKey`, although it already has a
`bytes` method. `agreement::PublicKey` already uses the `AsRef<[u8]>`
approach.
Also, add missing `Debug` implementation for
`signature::UnparsedPublicKey`.
I agree to license my contributions to each file under the terms given
at the top of each file I changed.
Ed25519 was disabled for WebAssembly due to some unrelated issues with
getting the X25519 code working in WebAssembly. Temporarily remove the
`agreement` API when targetting WebAssembly to work around those issues
in a way that lets us enabled Ed25519.
Many (most?) KDFs are infallible, so optimize for that case. If the KDF
is fallible then the result will be `Ok(Err(_))` which is messy.
This eliminates the `error_value` parameter.
The newest Rust Nightly is getting stricter about `forbid(warnings)`
which breaks the build.
Use "deny" instead of "forbid". And only deny when running Clippy in
CI/CD, so that when hacking on *ring* we don't have to deal with
warnings right away; we now only have to deal with them when we're ready
to submit a change to be merged.
Embed test data files into test executables so that file I/O isn't
necessary during tests. This allows the tests to run on platforms that
don't have file I/O. It also makes it easier to run the tests on a
separate (virtual) machine from the build machine since the test
automation no longer needs to keep track of the test files.
Switch to Rust 2018 Edition. Fix up some build breakage for different
configurations that were found in the process of testing this,
particularly `--no-default-features`.
