Add Riscv32 testing

add gh actions badge in readme
no-std hex

.github/workflows/runtest.yml

@@ -38,7 +38,5 @@ jobs:
         shell: bash
 
       - name: Test
-        run: |
-          chmod 777 ./ci/run-docker.sh
-          ./ci/run-docker.sh ${{ inputs.arch }} ${{ inputs.target }} ${{ inputs.extra-features }}
+        run: ./ci/run-docker.sh ${{ inputs.arch }} ${{ inputs.target }} ${{ inputs.extra-features }}
         shell: bash

.github/workflows/rust.yml

@@ -145,6 +145,16 @@ jobs:
       target-features: +zkne,+zknd
       extra-features: --features=nightly
 
+  test-riscv32:
+    name: Test of RiscV-32
+    uses: ./.github/workflows/runtest.yml
+    with:
+      arch: riscv32
+      target: riscv32imac-unknown-none-elf
+      channel: nightly
+      target-features: +zkne,+zknd
+      extra-features: --features=nightly
+
   test-software:
     strategy:
       matrix:

Cargo.toml

@@ -19,5 +19,5 @@ constant-time = []
 cfg-if = "1.0.0"
 
 [dev-dependencies]
-hex = "0.4.3"
+hex = { version = "0.4.3", default-features = false }
 lazy_static = "1.5.0"

README.md

@@ -1,3 +1,5 @@
+[![Actions Status](https://github.com/sayantn/aes/actions/workflows/rust.yml/badge.svg)](https://github.com/sayantn/aes/actions)
+
 This is a pure-Rust platform-agnostic [AES](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.197-upd1.pdf) library, that
 is focused on reusability and optimal performance.
 

ci/docker/riscv32

@@ -0,0 +1,13 @@
+FROM ubuntu:24.04
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  gcc \
+  ca-certificates \
+  libc6-dev \
+  gcc-riscv64-linux-gnu \
+  libc6-dev-riscv64-cross \
+  qemu-user \
+  make \
+  file
+
+ENV CARGO_TARGET_RISCV32IMAC_UNKNOWN_NONE_ELF_LINKER=riscv64-linux-gnu-gcc \
+    CARGO_TARGET_RISCV32IMAC_UNKNOWN_NONE_ELF_RUNNER="qemu-riscv32 -L /usr/riscv64-linux-gnu -cpu rv32,zk=true"