chacha20: apply unreachable_pub lint

.github/workflows/chacha20.yml

@@ -79,6 +79,9 @@ jobs:
 
   # Tests for the AVX-512 backend
   avx512:
+    # It looks like Intel blocks `curl` downloads, so the job is disabled
+    # until a fix is found
+    if: false
     runs-on: ubuntu-latest
     strategy:
       matrix:

chacha20/CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.10.1 (UNRELEASED)
+### Added
+- `ChaCha20LegacyCore` type and `Nonce` type alias ([#570])
+
+[#570]: https://github.com/RustCrypto/stream-ciphers/pull/570
+
 ## 0.10.0 (2026-02-07)
 ### Added
 - `rand_core` v0.10 support ([#333], [#513])

chacha20/Cargo.toml

@@ -45,6 +45,7 @@ missing_debug_implementations = "warn"
 missing_docs = "warn"
 trivial_casts = "warn"
 trivial_numeric_casts = "warn"
+unreachable_pub = "warn"
 unused_lifetimes = "warn"
 unused_qualifications = "warn"
 

chacha20/src/chacha.rs

@@ -1,4 +1,4 @@
-pub use cipher::{
+use cipher::{
     IvSizeUser, KeyIvInit, KeySizeUser, StreamCipherCoreWrapper,
     array::Array,
     consts::{U12, U32, U64},

chacha20/src/legacy.rs

@@ -1,7 +1,6 @@
 //! Legacy version of ChaCha20 with a 64-bit nonce
 
-use crate::chacha::Key;
-use crate::{ChaChaCore, R20};
+use crate::{ChaChaCore, Key, R20, variants::Legacy};
 use cipher::{
     IvSizeUser, KeyIvInit, KeySizeUser, StreamCipherCoreWrapper,
     array::Array,
@@ -10,7 +9,6 @@ use cipher::{
 
 /// Nonce type used by [`ChaCha20Legacy`].
 pub type LegacyNonce = Array<u8, U8>;
-use crate::variants::Legacy;
 
 /// The ChaCha20 stream cipher (legacy "djb" construction with 64-bit nonce).
 pub type ChaCha20Legacy = StreamCipherCoreWrapper<ChaCha20LegacyCore>;

chacha20/src/lib.rs

@@ -19,11 +19,13 @@ mod rng;
 mod xchacha;
 
 #[cfg(feature = "cipher")]
-pub use chacha::{ChaCha8, ChaCha12, ChaCha20, Key, KeyIvInit};
+pub use chacha::{ChaCha8, ChaCha12, ChaCha20, Key, Nonce};
 #[cfg(feature = "cipher")]
 pub use cipher;
+#[cfg(feature = "cipher")]
+pub use cipher::KeyIvInit;
 #[cfg(feature = "legacy")]
-pub use legacy::{ChaCha20Legacy, LegacyNonce};
+pub use legacy::{ChaCha20Legacy, ChaCha20LegacyCore, LegacyNonce};
 #[cfg(feature = "rng")]
 pub use rand_core;
 #[cfg(feature = "rng")]

chacha20/src/xchacha.rs

@@ -1,7 +1,7 @@
 //! XChaCha is an extended nonce variant of ChaCha
 
 use crate::{
-    CONSTANTS, ChaChaCore, R8, R12, R20, Rounds, STATE_WORDS, quarter_round, variants::Ietf,
+    CONSTANTS, ChaChaCore, Key, R8, R12, R20, Rounds, STATE_WORDS, quarter_round, variants::Ietf,
 };
 use cipher::{
     BlockSizeUser, IvSizeUser, KeyIvInit, KeySizeUser, StreamCipherClosure, StreamCipherCore,
@@ -13,9 +13,6 @@ use cipher::{
 #[cfg(feature = "zeroize")]
 use zeroize::ZeroizeOnDrop;
 
-/// Key type used by all ChaCha variants.
-pub type Key = Array<u8, U32>;
-
 /// Nonce type used by XChaCha variants.
 pub type XNonce = Array<u8, U24>;