[WIP] Migrate to hybrid-array; MSRV 1.65

Builds on RustCrypto/traits#1319.

Migrates the following crates away from using `generic-array` to using
`hybrid-array` instead:

- `block-buffer`
- `block-padding`
- `dbl`
- `inout`

.github/workflows/block-buffer.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
         target:
           - thumbv7em-none-eabi
@@ -37,8 +37,6 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
           targets: ${{ matrix.target }}
-      # Isolate this crate from workspace which is otherwise MSRV 1.56 due to 2021 edition crates
-      - run: rm ../Cargo.toml
       - run: cargo build --target ${{ matrix.target }}
 
   minimal-versions:
@@ -51,15 +49,13 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-      # Isolate this crate from workspace which is otherwise MSRV 1.56 due to 2021 edition crates
-      - run: rm ../Cargo.toml
       - run: cargo test
       - run: cargo test --all-features

.github/workflows/block-padding.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
         target:
           - thumbv7em-none-eabi
@@ -49,7 +49,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4

.github/workflows/dbl.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.41.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
         target:
           - thumbv7em-none-eabi
@@ -37,8 +37,6 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
           targets: ${{ matrix.target }}
-      # Isolate this crate from workspace which is otherwise MSRV 1.56 due to 2021 edition crates
-      - run: rm ../Cargo.toml
       - run: cargo build --target ${{ matrix.target }}
 
   minimal-versions:
@@ -51,14 +49,12 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.41.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-      # Isolate this crate from workspace which is otherwise MSRV 1.56 due to 2021 edition crates
-      - run: rm ../Cargo.toml
       - run: cargo test

.github/workflows/inout.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
         target:
           - thumbv7em-none-eabi
@@ -50,7 +50,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.56.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     steps:
       - uses: actions/checkout@v4

Cargo.toml

@@ -19,3 +19,7 @@ members = [
 
 [profile.dev]
 opt-level = 2
+
+[patch.crates-io]
+crypto-common = { git = "https://github.com/RustCrypto/traits", branch = "crypto-common/hybrid-array" }
+hybrid-array = { path = "hybrid-array" }

block-buffer/Cargo.toml

@@ -13,7 +13,6 @@ readme = "README.md"
 
 [dependencies]
 crypto-common = "0.2.0-pre"
-generic-array = "0.14"
 
 [dev-dependencies]
 hex-literal = "0.3.3"

block-buffer/README.md

@@ -29,7 +29,7 @@ Unless you explicitly state otherwise, any contribution intentionally submitted
 [docs-image]: https://docs.rs/block-buffer/badge.svg
 [docs-link]: https://docs.rs/block-buffer/
 [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
-[rustc-image]: https://img.shields.io/badge/rustc-1.41+-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.65+-blue.svg
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260052-utils
 [build-image]: https://github.com/RustCrypto/utils/workflows/block-buffer/badge.svg?branch=master&event=push

block-buffer/src/lib.rs

@@ -6,23 +6,22 @@
 )]
 #![warn(missing_docs, rust_2018_idioms)]
 
-pub use generic_array;
+pub use crypto_common::{array, Block};
 
-use core::{fmt, ops::Add, slice};
-pub use crypto_common::Block;
-use crypto_common::{BlockSizeUser, BlockSizes};
-use generic_array::{
+use array::{
     typenum::{Add1, B1},
-    ArrayLength, GenericArray,
+    Array, ArraySize,
 };
+use core::{fmt, ops::Add, slice};
+use crypto_common::{BlockSizeUser, BlockSizes};
 
 mod read;
 mod sealed;
 
 pub use read::ReadBuffer;
 
 /// Block with additional one byte
-type BlockP1<BlockSize> = GenericArray<u8, Add1<BlockSize>>;
+type BlockP1<BlockSize> = Array<u8, Add1<BlockSize>>;
 
 /// Trait for buffer kinds.
 pub trait BufferKind: sealed::Sealed {}
@@ -304,7 +303,7 @@ impl<BS: BlockSizes> BlockBuffer<BS, Lazy> {
     pub fn serialize(&self) -> BlockP1<BS>
     where
         BS: Add<B1>,
-        Add1<BS>: ArrayLength<u8>,
+        Add1<BS>: ArraySize,
     {
         let mut res = BlockP1::<BS>::default();
         res[0] = self.pos;
@@ -318,7 +317,7 @@ impl<BS: BlockSizes> BlockBuffer<BS, Lazy> {
     pub fn deserialize(buffer: &BlockP1<BS>) -> Result<Self, Error>
     where
         BS: Add<B1>,
-        Add1<BS>: ArrayLength<u8>,
+        Add1<BS>: ArraySize,
     {
         let pos = buffer[0];
         if !<Lazy as sealed::Sealed>::invariant(pos as usize, BS::USIZE) {
@@ -327,9 +326,7 @@ impl<BS: BlockSizes> BlockBuffer<BS, Lazy> {
         if buffer[1..][pos as usize..].iter().any(|&b| b != 0) {
             return Err(Error);
         }
-        Ok(Self {
-            buffer: GenericArray::clone_from_slice(&buffer[1..]),
-            pos,
-        })
+        let buffer = Array::clone_from_slice(&buffer[1..]);
+        Ok(Self { buffer, pos })
     }
 }

block-buffer/src/sealed.rs

@@ -1,5 +1,5 @@
+use crate::array::{Array, ArraySize};
 use core::slice;
-use generic_array::{ArrayLength, GenericArray};
 
 /// Sealed trait for buffer kinds.
 pub trait Sealed {
@@ -14,7 +14,7 @@ pub trait Sealed {
     fn invariant(pos: usize, block_size: usize) -> bool;
 
     /// Split input data into slice of blocks and tail.
-    fn split_blocks<N: ArrayLength<u8>>(data: &[u8]) -> (&[GenericArray<u8, N>], &[u8]);
+    fn split_blocks<N: ArraySize>(data: &[u8]) -> (&[Array<u8, N>], &[u8]);
 }
 
 impl Sealed for super::Eager {
@@ -35,14 +35,14 @@ impl Sealed for super::Eager {
     }
 
     #[inline(always)]
-    fn split_blocks<N: ArrayLength<u8>>(data: &[u8]) -> (&[GenericArray<u8, N>], &[u8]) {
+    fn split_blocks<N: ArraySize>(data: &[u8]) -> (&[Array<u8, N>], &[u8]) {
         let nb = data.len() / N::USIZE;
         let blocks_len = nb * N::USIZE;
         let tail_len = data.len() - blocks_len;
         // SAFETY: we guarantee that created slices do not point
         // outside of `data`
         unsafe {
-            let blocks_ptr = data.as_ptr() as *const GenericArray<u8, N>;
+            let blocks_ptr = data.as_ptr() as *const Array<u8, N>;
             let tail_ptr = data.as_ptr().add(blocks_len);
             (
                 slice::from_raw_parts(blocks_ptr, nb),
@@ -70,7 +70,7 @@ impl Sealed for super::Lazy {
     }
 
     #[inline(always)]
-    fn split_blocks<N: ArrayLength<u8>>(data: &[u8]) -> (&[GenericArray<u8, N>], &[u8]) {
+    fn split_blocks<N: ArraySize>(data: &[u8]) -> (&[Array<u8, N>], &[u8]) {
         if data.is_empty() {
             return (&[], &[]);
         }
@@ -84,7 +84,7 @@ impl Sealed for super::Lazy {
         // SAFETY: we guarantee that created slices do not point
         // outside of `data`
         unsafe {
-            let blocks_ptr = data.as_ptr() as *const GenericArray<u8, N>;
+            let blocks_ptr = data.as_ptr() as *const Array<u8, N>;
             let tail_ptr = data.as_ptr().add(blocks_len);
             (
                 slice::from_raw_parts(blocks_ptr, nb),