chore: Release 2.0.0-rc.3 (#307)

* chore: Release 2.0.0-rc.3

* cargo update -p curve25519-dalek

* Removed some old backend selection prose and env vars

---------

Co-authored-by: Michael Rosenberg <michael@mrosenberg.pub>

CHANGELOG.md

@@ -18,11 +18,14 @@ Entries are listed in reverse chronological order per undeprecated major series.
 * Make `digest` an optional dependency
 * Make `zeroize` an optional dependency
 * Make `rand_core` an optional dependency
-* Adopt [curve25519-backend selection](https://github.com/dalek-cryptography/curve25519-dalek/#backends) over features
-* Make all batch verification deterministic remove `batch_deterministic` ([#256](https://github.com/dalek-cryptography/ed25519-dalek/pull/256))
-* Remove `ExpandedSecretKey` API ((#205)[https://github.com/dalek-cryptography/ed25519-dalek/pull/205])
+* [curve25519 backends] are now automatically selected
+* [curve25519 backends] are now overridable via cfg instead of using additive features
+* Make all batch verification deterministic remove `batch_deterministic` (PR [#256](https://github.com/dalek-cryptography/ed25519-dalek/pull/256))
 * Rename `Keypair` → `SigningKey` and `PublicKey` → `VerifyingKey`
-* Make `hazmat` feature to expose, `ExpandedSecretKey`, `raw_sign()`, `raw_sign_prehashed()`, `raw_verify()`, and `raw_verify_prehashed()`
+* Remove default-public `ExpandedSecretKey` API (PR [#205](https://github.com/dalek-cryptography/ed25519-dalek/pull/205))
+* Make `hazmat` feature to expose `ExpandedSecretKey`, `raw_sign()`, `raw_sign_prehashed()`, `raw_verify()`, and `raw_verify_prehashed()`
+
+[curve25519 backends]: https://github.com/dalek-cryptography/curve25519-dalek/#backends
 
 ### Other changes
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ed25519-dalek"
-version = "2.0.0-rc.2"
+version = "2.0.0-rc.3"
 edition = "2021"
 authors = [
     "isis lovecruft <isis@patternsinthevoid.net>",
@@ -25,7 +25,7 @@ rustdoc-args = [
 features = ["batch", "digest", "hazmat", "pem", "serde"]
 
 [dependencies]
-curve25519-dalek = { version = "=4.0.0-rc.2", default-features = false, features = ["digest"] }
+curve25519-dalek = { version = "=4.0.0-rc.3", default-features = false, features = ["digest"] }
 ed25519 = { version = ">=2.2, <2.3", default-features = false }
 signature = { version = ">=2.0, <2.1", optional = true, default-features = false }
 sha2 = { version = "0.10", default-features = false }
@@ -37,7 +37,7 @@ serde = { version = "1.0", default-features = false, optional = true }
 zeroize = { version = "1.5", default-features = false, optional = true }
 
 [dev-dependencies]
-curve25519-dalek = { version = "=4.0.0-rc.2", default-features = false, features = ["digest", "rand_core"] }
+curve25519-dalek = { version = "=4.0.0-rc.3", default-features = false, features = ["digest", "rand_core"] }
 blake2 = "0.10"
 sha3 = "0.10"
 hex = "0.4"
@@ -73,7 +73,3 @@ pem = ["alloc", "ed25519/pem", "pkcs8"]
 rand_core = ["dep:rand_core"]
 serde = ["dep:serde", "ed25519/serde"]
 zeroize = ["dep:zeroize", "curve25519-dalek/zeroize"]
-
-[patch.crates-io.curve25519-dalek]
-git = "https://github.com/dalek-cryptography/curve25519-dalek.git"
-rev = "f460ae149b0000695205cc78f560d74a2d3918eb"

README.md

@@ -18,7 +18,7 @@ ed25519-dalek = "1"
 To use the latest prerelease (see changes [below](#breaking-changes-in-200)),
 use the following line in your project's `Cargo.toml`:
 ```toml
-ed25519-dalek = "2.0.0-rc.2"
+ed25519-dalek = "2.0.0-rc.3"
 ```
 
 # Feature Flags
@@ -103,7 +103,7 @@ Benchmarks are run using [criterion.rs](https://github.com/japaric/criterion.rs)
 ```sh
 cargo bench --features "batch"
 # Uses avx2 or ifma only if compiled for an appropriate target.
-export RUSTFLAGS='--cfg curve25519_dalek_backend="simd" -C target_cpu=native'
+export RUSTFLAGS='-C target_cpu=native'
 cargo +nightly bench --features "batch"
 ```
 
@@ -134,7 +134,7 @@ want to test the benchmarks on your target CPU to discover the best size.
 
 ## (Micro)Architecture Specific Backends
 
-A _backend_ refers to an implementation of elliptic curve and scalar arithmetic. Different backends have different use cases. For example, if you demand formally verified code, you want to use the `fiat` backend (as it was generated from [Fiat Crypto][fiat]). If you want the highest performance possible, you probably want the `simd` backend.
+A _backend_ refers to an implementation of elliptic curve and scalar arithmetic. Different backends have different use cases. For example, if you demand formally verified code, you want to use the `fiat` backend (as it was generated from [Fiat Crypto][fiat]).
 
 Backend selection details and instructions can be found in the [curve25519-dalek docs](https://github.com/dalek-cryptography/curve25519-dalek#backends).