Unify the aes, aesni, and aes-soft crates (#200)

Combines all three crates into a single `aes` crate.

The optional `ctr` feature exposes a consistent set of `Aes*Ctr` types as well.

.github/workflows/aes.yml

@@ -31,25 +31,106 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
           profile: minimal
+          override: true
+      - run: cargo build --release --target ${{ matrix.target }}
+
+  # Tests for the portable software backend
+  soft:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          # 32-bit Linux
+          - target: i686-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+            deps: sudo apt install gcc-multilib
+          - target: i686-unknown-linux-gnu
+            rust: stable
+            deps: sudo apt install gcc-multilib
+
+          # 64-bit Linux
+          - target: x86_64-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+          - target: x86_64-unknown-linux-gnu
+            rust: stable
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
+          profile: minimal
           override: true
-      - run: cargo build --no-default-features --release --target ${{ matrix.target }}
-  test:
+      - run: ${{ matrix.deps }}
+      - run: cargo check --target ${{ matrix.target }} --all-features
+      - run: cargo test --release --target ${{ matrix.target }}
+      - run: cargo test --release --target ${{ matrix.target }} --features semi_fixslice
+
+  # Tests for the AES-NI backend
+  aesni:
     runs-on: ubuntu-latest
+    env:
+      CARGO_INCREMENTAL: 0
+      RUSTDOCFLAGS: "-Ctarget-feature=+aes,+ssse3"
+      RUSTFLAGS: "-Dwarnings -Ctarget-feature=+aes,+ssse3"
     strategy:
       matrix:
-        rust:
-          - 1.41.0 # MSRV
-          - stable
+        include:
+          # 32-bit Linux
+          - target: i686-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+            deps: sudo apt install gcc-multilib
+          - target: i686-unknown-linux-gnu
+            rust: stable
+            deps: sudo apt install gcc-multilib
+
+          # 64-bit Linux
+          - target: x86_64-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+          - target: x86_64-unknown-linux-gnu
+            rust: stable
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions-rs/toolchain@v1
-      with:
-        profile: minimal
-        toolchain: ${{ matrix.rust }}
-    - run: cargo check --all-features
-    - run: cargo test --no-default-features
-    - run: cargo test
-    - run: cargo test --all-features
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+      - run: ${{ matrix.deps }}
+      - run: cargo check --all-features
+      - run: cargo test --no-default-features
+      - run: cargo test
+      - run: cargo test --all-features
+
+  # Cross-compiled tests
+  cross:
+    strategy:
+      matrix:
+        include:
+          # ARM64
+          - target: aarch64-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+          - target: aarch64-unknown-linux-gnu
+            rust: stable
+
+          # PPC32
+          - target: powerpc-unknown-linux-gnu
+            rust: 1.41.0 # MSRV
+          - target: powerpc-unknown-linux-gnu
+            rust: stable
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: ${{ matrix.deps }}
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
+          profile: minimal
+          override: true
+      - run: cargo install cross
+      - run: cross test --release --target ${{ matrix.target }}
+      - run: cross test --release --target ${{ matrix.target }} --features semi_fixslice

Cargo.toml

@@ -1,8 +1,6 @@
 [workspace]
 members = [
     "aes",
-    "aes/aes-soft",
-    "aes/aesni",
     "blowfish",
     "block-modes",
     "gost-modes",

aes/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "aes"
 version = "0.6.0"
-description = "Facade for AES (Rijndael) block ciphers implementations"
+description = """
+Pure Rust implementation of the Advanced Encryption Standard (a.k.a. Rijndael)
+including support for AES in counter mode (a.k.a. AES-CTR)
+"""
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"
@@ -13,12 +16,15 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 cipher = "0.2"
-
-[target.'cfg(not(all(target_feature="aes", target_feature = "sse2", any(target_arch = "x86_64", target_arch = "x86"))))'.dependencies]
-aes-soft = { version = "0.6", path = "aes-soft" }
-
-[target.'cfg(all(target_feature="aes", target_feature = "sse2", any(target_arch = "x86_64", target_arch = "x86")))'.dependencies]
-aesni = { version = "0.10", default-features = false, path = "aesni" }
+ctr = { version = "0.6", optional = true }
+opaque-debug = "0.3"
 
 [dev-dependencies]
 cipher = { version = "0.2", features = ["dev"] }
+
+[features]
+semi_fixslice = []
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]