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Constant time cmov (#241)

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* Constant time `cmov`

* Adjust byte size

* Move from `to_signed_bytes_le` to `to_bytes_le`

* Add experimental p256 warning

* Remove redundant sign handling in `cmov`

* Remove unnecessary `Sub` implementation

* Improve note on missing constant-time implementations

* Move `inv0()` to `FieldElement`

* Fix Rust 1.51 compilation

* Remove unnecessary reference

Co-authored-by: Kevin Lewi <[email protected]>
This commit is contained in:
daxpedda
2021-10-04 13:50:03 -07:00
committed by GitHub
co-authored by Kevin Lewi
parent 328b07f217
commit 77fbdb29f8
2 changed files with 39 additions and 21 deletions
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src/lib.rs
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@@ -819,7 +819,8 @@
//! [curve25519-dalek](https://doc.dalek.rs/curve25519_dalek/index.html#backends-and-features) and allow for selecting
//! the corresponding backend for the curve arithmetic used. The `u64_backend` feature is included as the default.
//!
//! - The `p256` feature enables the use of `p256::ProjectivePoint` as a `Group` for `CipherSuite`.
//! - The `p256` feature enables the use of `p256::ProjectivePoint` as a `Group` for `CipherSuite`. Note that this
//! is currently an experimental feature ⚠️, and is not yet ready for production use.
//!
//! - The `bench` feature is used only for running performance benchmarks for this implementation.
//!