[crypto] Harden RSA modexp subroutine. #3598

Workflow file for this run

	# Copyright lowRISC contributors (OpenTitan project).
	# Licensed under the Apache License, Version 2.0, see LICENSE for details.
	# SPDX-License-Identifier: Apache-2.0

	name: CI
	on:
	pull_request:
	push:
	branches-ignore:
	- "backport-*"
	tags:
	- "*"

	permissions:
	contents: read
	# Needed for workload identity federation
	id-token: write

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: ${{ github.event_name == 'pull_request' }}

	env:
	VIVADO_VERSION: "2021.1"
	# Release tag from https://github.com/lowRISC/lowrisc-toolchains/releases
	TOOLCHAIN_VERSION: 20220210-1

	jobs:
	quick_lint:
	name: Lint (quick)
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Required so we can lint commit messages.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Show environment
	run: ./ci/scripts/show-env.sh
	- name: Commit metadata
	run: ./ci/scripts/lint-commits.sh "$GITHUB_BASE_REF"
	if: ${{ github.event_name == 'pull_request' }}
	- name: License headers
	run: ./ci/scripts/check-licence-headers.sh "$GITHUB_BASE_REF"
	if: ${{ github.event_name == 'pull_request' }}
	- name: Executable bits
	run: ./ci/scripts/exec-check.sh
	- name: Non-ASCII characters
	run: ./ci/scripts/check-ascii.sh
	- name: Python (flake8)
	run: ./ci/scripts/python-lint.sh "$GITHUB_BASE_REF"
	if: ${{ github.event_name == 'pull_request' }}
	- name: Python (mypy)
	run: ./ci/scripts/mypy.sh
	- name: Validate testplans with schema
	run: ./ci/scripts/validate_testplans.sh
	- name: C/C++ formatting
	run: ./bazelisk.sh test //quality:clang_format_check
	- name: Rust formatting
	run: ./bazelisk.sh test //quality:rustfmt_check
	- name: Shellcheck
	run: ./bazelisk.sh test //quality:shellcheck_check
	- name: Header guards
	run: ./ci/scripts/include-guard.sh "$GITHUB_BASE_REF"
	if: ${{ github.event_name == 'pull_request' }}
	- name: Trailing whitespace
	run: ./ci/scripts/whitespace.sh "$GITHUB_BASE_REF"
	if: ${{ github.event_name == 'pull_request' }}
	- name: Broken links
	run: ./ci/scripts/check-links.sh
	- name: Generated documentation
	run: ./ci/scripts/check-cmdgen.sh

	slow_lint:
	name: Lint (slow)
	runs-on: ubuntu-22.04
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Bitstream cache requires all commits.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Countermeasures implemented (earlgrey)
	run: ./ci/scripts/check-countermeasures.sh earlgrey
	continue-on-error: true
	- name: Countermeasures implemented (englishbreakfast)
	run: ./ci/scripts/check-countermeasures.sh englishbreakfast
	continue-on-error: true
	- name: Bazel test suite tags
	run: ./ci/scripts/check_bazel_test_suites.py
	continue-on-error: true
	# See #21973: disabled until Verilator tags are fixed.
	# - name: Check Bazel tags
	# run: ./ci/scripts/check-bazel-tags.sh
	# continue-on-error: true
	- name: Banned Bazel rules
	run: ./ci/scripts/check-bazel-banned-rules.sh
	- name: Bazel target names
	run: ./ci/scripts/check_bazel_target_names.py
	continue-on-error: true
	- name: DV software images
	run: ./ci/scripts/check_dv_sw_images.sh
	continue-on-error: true
	- name: Generated files
	run: ./ci/scripts/check-generated.sh
	env:
	OT_DESTRUCTIVE: 1 # Required by the script to clean up.
	- name: Buildifier
	run: ./bazelisk.sh test //quality:buildifier_check
	- name: Vendored files
	run: ./ci/scripts/check-vendoring.sh
	- name: Verible RTL
	run: ./ci/scripts/verible-lint.sh rtl
	- name: Verible DV
	run: ./ci/scripts/verible-lint.sh dv
	- name: Verible FPV
	run: ./ci/scripts/verible-lint.sh fpv

	build_docs:
	name: Build documentation
	runs-on: ubuntu-22.04
	needs: quick_lint
	env:
	BUCKET: gold-hybrid-255313-prod
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Bitstream cache requires all commits.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Build documentation
	run: util/site/build-docs.sh build
	- name: Upload files
	if: ${{ github.event_name != 'pull_request' && github.ref_name == 'master' }}
	run: \|
	echo "::group::Upload all uncompressed files"
	gcloud storage cp -R --gzip-in-flight=js,css,html "build-site/*" gs://$BUCKET
	echo "::endgroup::"

	# This script compresses the searchindex files, replacing the originals in-place.
	# (This is how 'content-encoding'-tagged files should be uploaded to gcloud buckets)
	util/site/post-build.sh compress_br

	search_indexes=$(find build-site/ -type f -name '*searchindex.json')
	for f in $search_indexes; do
	echo "Uploading compressed file ${f}"
	# Get directory of file, relative to the build directory.
	# - var=${var#*//} # removes stuff from the begining up to //
	dir=$(dirname "${f#*build-site/}")
	# When serving from gcloud buckets, file should be uploaded with an identical name as the
	# original, but compressed and with the matching 'content-encoding' and 'content-type' tags applied.
	gcloud storage cp \
	--content-encoding=br \
	--content-type=application/json \
	-R \
	"$f" "gs://$BUCKET/${dir}/"
	done

	airgapped_build:
	name: Airgapped build
	runs-on: ubuntu-22.04
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Bitstream cache requires all commits.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	configure-bazel: false
	- name: Free disk space
	uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be
	- name: Check disk space
	run: \|
	df -h
	- name: Prepare airgapped environment
	run: ./util/prep-bazel-airgapped-build.sh
	- name: Check disk space
	run: \|
	df -h
	- name: Build in the airgapped environment
	run: ./ci/scripts/test-airgapped-build.sh

	verible_lint:
	name: Verible lint
	runs-on: ubuntu-24.04
	needs: quick_lint
	if: ${{ github.event_name == 'pull_request' }}
	env:
	verible_config: hw/lint/tools/veriblelint/lowrisc-styleguide.rules.verible_lint
	verible_version: v0.0-3430-g060bde0f
	steps:
	- uses: actions/checkout@v4
	- name: Prepare Verible config
	run: \|
	echo "Concatenating Verible waivers"
	find . -type f -name '*.vbl' -exec cat {} \; >> verible_waiver

	echo "::group::Verible config"
	cat "$verible_config"
	echo "::endgroup::"

	echo "::group::Verible waiver"
	cat "verible_waiver"
	echo "::endgroup::"
	- name: Run Verible linter action
	uses: chipsalliance/[email protected]
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	verible_version: ${{ env.verible_version }}
	reviewdog_reporter: 'github-pr-check'
	suggest_fixes: 'false'
	config_file: ${{ env.verible_config }}
	extra_args: "--waiver_files=verible_waiver"

	otbn_standalone_tests:
	name: Run OTBN smoke Test
	needs: quick_lint
	runs-on: ubuntu-22.04
	timeout-minutes: 10
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Bitstream cache requires all commits.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Install toolchain
	run: \|
	TOOLCHAIN_PATH=/tools/riscv
	sudo util/get-toolchain.py \
	--install-dir="$TOOLCHAIN_PATH" \
	--release-version="$TOOLCHAIN_VERSION" \
	--update
	echo "$TOOLCHAIN_PATH/bin" >> $GITHUB_PATH
	- name: Display environment
	run: \|
	python3 --version
	fusesoc --version
	verilator --version
	- name: OTBN ISS test
	run: make -C hw/ip/otbn/dv/otbnsim test
	- name: OBTN smoke test
	run: ./hw/ip/otbn/dv/smoke/run_smoke.sh
	- name: Assemble & link code snippets
	run: make -C hw/ip/otbn/util asm-check

	otbn_crypto_tests:
	name: Run OTBN crypto tests
	needs: quick_lint
	runs-on: ubuntu-22.04
	timeout-minutes: 60
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Bitstream cache requires all commits.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Execute tests
	run: ./bazelisk.sh test --test_tag_filters=-nightly //sw/otbn/crypto/...

	verilator_englishbreakfast:
	name: Verilated English Breakfast
	runs-on: ubuntu-22.04
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Build simulator with Verilator
	run: ./ci/scripts/build-chip-verilator.sh englishbreakfast
	- name: Upload binary
	uses: actions/upload-artifact@v4
	with:
	name: verilated_englishbreakfast
	path: build-bin/hw/top_englishbreakfast/Vchip_englishbreakfast_verilator
	overwrite: true
	- name: Test
	run: ./ci/scripts/run-english-breakfast-verilator-tests.sh

	verilator_earlgrey:
	name: Verilated Earl Grey
	runs-on: ubuntu-20.04
	needs: quick_lint
	timeout-minutes: 240
	steps:
	- uses: actions/checkout@v4
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Run fast Verilator tests
	run: ./ci/scripts/run-verilator-tests.sh
	- name: Publish Bazel test results
	uses: ./.github/actions/publish-bazel-test-results
	if: ${{ !cancelled() }}
	with:
	artifact-name: verilator_earlgrey-test-results

	# Build CW305 variant of the English Breakfast toplevel design using Vivado
	chip_englishbreakfast_cw305:
	name: CW305's Bitstream
	runs-on: ubuntu-22.04-vivado
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Build bitstream
	run: \|
	# Build CW305 test rom required by `build-bitstream-vivado.sh`
	rom_path="sw/device/lib/testing/test_rom"
	./bazelisk.sh build "//${rom_path}:test_rom_fpga_cw305" \
	--features=-rv32_bitmanip \
	--copt=-DOT_IS_ENGLISH_BREAKFAST_REDUCED_SUPPORT_FOR_INTERNAL_USE_ONLY_
	vmem="$(./bazelisk.sh cquery --output=files "//${rom_path}:test_rom_fpga_cw305" \
	--features=-rv32_bitmanip \
	--copt=-DOT_IS_ENGLISH_BREAKFAST_REDUCED_SUPPORT_FOR_INTERNAL_USE_ONLY_
	)"
	mkdir -p "build-bin/${rom_path}"
	cp "$vmem" "build-bin/${rom_path}"

	module load "xilinx/vivado/${VIVADO_VERSION}"
	ci/scripts/build-bitstream-vivado.sh top_englishbreakfast cw305
	- name: Upload bitstream
	uses: actions/upload-artifact@v4
	with:
	name: chip_englishbreakfast_cw305
	path: build-bin/hw/top_englishbreakfast/lowrisc_systems_chip_englishbreakfast_cw305_0.1.bit
	overwrite: true

	chip_earlgrey_cw310:
	name: Earl Grey for CW310
	needs: quick_lint
	uses: ./.github/workflows/bitstream.yml
	secrets: inherit
	with:
	top_name: earlgrey
	design_suffix: cw310

	chip_earlgrey_cw310_hyperdebug:
	name: Earl Grey for CW310 Hyperdebug
	needs: quick_lint
	uses: ./.github/workflows/bitstream.yml
	secrets: inherit
	with:
	top_name: earlgrey
	design_suffix: cw310_hyperdebug

	chip_earlgrey_cw340:
	name: Earl Grey for CW340
	needs: quick_lint
	uses: ./.github/workflows/bitstream.yml
	secrets: inherit
	with:
	top_name: earlgrey
	design_suffix: cw340

	cache_bitstreams:
	name: Cache bitstreams to GCP
	runs-on: ubuntu-22.04
	if: ${{ github.event_name != 'pull_request' }}
	needs:
	- chip_earlgrey_cw310
	- chip_earlgrey_cw310_hyperdebug
	- chip_earlgrey_cw340
	steps:
	- uses: actions/checkout@v4
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Download partial build-bin
	uses: ./.github/actions/download-partial-build-bin
	with:
	job-patterns: chip_earlgrey_{cw310,cw310_hyperdebug,cw340}
	- name: Create bitstream cache archive
	run: \|
	shopt -s globstar # Allow use of **
	./bazelisk.sh build //util/py/scripts:bitstream_cache_create
	./bazelisk.sh run //util/py/scripts:bitstream_cache_create -- \
	--schema $PWD/rules/scripts/bitstreams_manifest.schema.json \
	--stamp-file $PWD/bazel-out/volatile-status.txt \
	--out $PWD/build-bin/bitstream-cache \
	$PWD/build-bin/**/manifest.json
	- name: Upload bitstreams to GCP bucket
	run: \|
	BUCKET_URI=gs://opentitan-bitstreams/${{ github.ref_name }}
	printf "$(date -u +%Y-%m-%dT%H:%M:%S)\n${{ github.sha }}" > latest.txt
	gcloud storage cp build-bin/bitstream-cache/bitstream-cache.tar.gz $BUCKET_URI/bitstream-${{ github.sha }}.tar.gz
	gcloud storage cp latest.txt $BUCKET_URI/latest.txt
	gcloud storage cp $BUCKET_URI/bitstream-${{ github.sha }}.tar.gz $BUCKET_URI/bitstream-latest.tar.gz

	# CW310 FPGA jobs.
	execute_test_rom_fpga_tests_cw310:
	name: CW310 Test ROM Tests
	needs: chip_earlgrey_cw310
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_test_rom_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310
	board: cw310
	interface: cw310
	tag_filters: cw310_test_rom

	execute_rom_fpga_tests_cw310:
	name: CW310 ROM Tests
	needs: chip_earlgrey_cw310
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_rom_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310
	board: cw310
	interface: cw310
	tag_filters: "cw310_rom_with_fake_keys,cw310_rom_with_real_keys,-manuf"
	timeout: 90

	execute_rom_ext_fpga_tests_cw310:
	name: CW310 ROM_EXT Tests
	needs: chip_earlgrey_cw310
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_rom_ext_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310
	board: cw310
	interface: cw310
	tag_filters: cw310_rom_ext

	execute_sival_fpga_tests_cw310:
	name: CW310 SiVal Tests
	needs: chip_earlgrey_cw310_hyperdebug
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_sival_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310_hyperdebug
	board: cw310
	interface: hyper310
	tag_filters: "cw310_sival,-manuf"

	execute_sival_rom_ext_fpga_tests_cw310:
	name: CW310 SiVal ROM_EXT Tests
	needs: chip_earlgrey_cw310_hyperdebug
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_sival_rom_ext_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310_hyperdebug
	board: cw310
	interface: hyper310
	tag_filters: cw310_sival_rom_ext

	execute_manuf_fpga_tests_cw310:
	name: CW310 Manufacturing Tests
	needs: chip_earlgrey_cw310_hyperdebug
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_manuf_fpga_tests_cw310
	bitstream: chip_earlgrey_cw310_hyperdebug
	board: cw310
	interface: hyper310
	tag_filters: "manuf,-cw340"

	# CW340 FPGA jobs
	execute_test_rom_fpga_tests_cw340:
	name: CW340 Test ROM Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_test_rom_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: cw340_test_rom

	execute_rom_fpga_tests_cw340:
	name: CW340 ROM Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_rom_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: "cw340_rom_with_fake_keys,cw340_rom_with_real_keys,-manuf"

	execute_rom_ext_fpga_tests_cw340:
	name: CW340 ROM_EXT Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_rom_ext_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: cw340_rom_ext

	execute_sival_fpga_tests_cw340:
	name: CW340 SiVal Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_sival_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: "cw340_sival,-manuf"

	execute_sival_rom_ext_fpga_tests_cw340:
	name: CW340 SiVal ROM_EXT Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_sival_rom_ext_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: cw340_sival_rom_ext

	execute_manuf_fpga_tests_cw340:
	name: CW340 Manufacturing Tests
	needs: chip_earlgrey_cw340
	uses: ./.github/workflows/fpga.yml
	secrets: inherit
	with:
	job_name: execute_manuf_fpga_tests_cw340
	bitstream: chip_earlgrey_cw340
	board: cw340
	interface: cw340
	tag_filters: "manuf,-hyper310"

	verify_fpga_jobs:
	name: Verify FPGA jobs
	runs-on: ubuntu-22.04
	needs:
	- execute_test_rom_fpga_tests_cw310
	- execute_rom_fpga_tests_cw310
	- execute_rom_ext_fpga_tests_cw310
	- execute_sival_fpga_tests_cw310
	- execute_sival_rom_ext_fpga_tests_cw310
	- execute_manuf_fpga_tests_cw310
	- execute_test_rom_fpga_tests_cw340
	- execute_rom_fpga_tests_cw340
	- execute_rom_ext_fpga_tests_cw340
	- execute_sival_fpga_tests_cw340
	- execute_sival_rom_ext_fpga_tests_cw340
	- execute_manuf_fpga_tests_cw340
	if: success() \|\| failure()
	steps:
	- uses: actions/checkout@v4
	- name: Download target pattern files
	uses: actions/download-artifact@v4
	with:
	pattern: execute_*-targets
	path: verify_fpga_jobs
	- name: List all target pattern files
	run: \|
	find verify_fpga_jobs
	- name: Checking for duplicate test runs
	run: \|
	# Find and display all duplicates:
	# - for each target file and each line, print '<job_name> <target>'
	# - then sort by the target name
	# - then keep all duplicated lines
	pattern_files=$(find verify_fpga_jobs -name target_pattern_file.txt)
	awk '{ print(gensub(/.*\/(.+)\/target_pattern_file.txt/, "\\1", "g", FILENAME) " " $0) }' $pattern_files \| sort -k2 \| uniq -D -f1 > duplicates.txt
	if [ -s duplicates.txt ]; then
	echo "The following tests ran in two or more jobs:"
	cat duplicates.txt
	false
	fi
	- name: Checking for missing test runs
	if: success() \|\| failure()
	run: \|
	# Find and display tests that did not run:
	./ci/scripts/run-bazel-test-query.sh all_fpga.txt fpga,-manual,-broken,-skip_in_ci //... @manufacturer_test_hooks//...
	sort -o all_fpga.txt all_fpga.txt
	pattern_files=$(find verify_fpga_jobs -name target_pattern_file.txt)
	sort $pattern_files > all_run.txt
	comm -23 all_fpga.txt all_run.txt > missing.txt
	if [ -s missing.txt ]; then
	echo "The following tests did not run in any job:"
	cat missing.txt
	false
	fi

	build_docker_containers:
	name: Build Docker Containers
	runs-on: ubuntu-22.04
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	- name: Build Developer Utility Container
	uses: docker/build-push-action@v6
	env:
	DOCKER_BUILD_SUMMARY: false
	DOCKER_BUILD_RECORD_UPLOAD: false
	with:
	context: .
	file: util/container/Dockerfile
	continue-on-error: true
	- name: Build Documentation Redirector Container
	uses: docker/build-push-action@v6
	env:
	DOCKER_BUILD_SUMMARY: false
	DOCKER_BUILD_RECORD_UPLOAD: false
	with:
	context: site/redirector/landing

	sw_build_test:
	name: Build and test software
	runs-on: ubuntu-22.04-vivado
	timeout-minutes: 120
	needs: quick_lint
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Required for bitstream cache to work.
	- name: Prepare environment
	uses: ./.github/actions/prepare-env
	with:
	service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
	- name: Check Bazel build graph
	run: \|
	# Test the graph with both an empty and filled bitstream cache.
	./ci/scripts/test-empty-bitstream-cache.sh
	./bazelisk.sh build --nobuild //...
	- name: Select software targets
	run: \|
	target_pattern_file="$(mktemp)"
	echo "target_pattern_file=${target_pattern_file}" >> "$GITHUB_ENV"

	# Start with building the whole graph.
	echo '//...' > "$target_pattern_file"
	# Exclude some targets:
	#
	# 1. `//hw/...` is out of scope.
	# 2. `//quality/...` is tested by the lint jobs.
	# 3. `//sw/otbn/crypto/...` is tested by the OTBN job.
	# 4. `//third_party/...` which is not our code.
	printf "%s\n" \
	"-//hw/..." \
	"-//quality/..." \
	"-//sw/otbn/crypto/..." \
	"-//third_party/..." \
	>> "$target_pattern_file"
	# Exclude anything that requires a bitstream splice.
	./bazelisk.sh cquery \
	--noinclude_aspects \
	--output=starlark \
	--starlark:expr='"-{}".format(target.label)' \
	--define DISABLE_VERILATOR_BUILD=true \
	-- "rdeps(//..., kind(bitstream_splice, //...))" \
	>> "$target_pattern_file"
	- name: Build software targets
	run: \|
	# Build everything we selected, excluding some tags.
	./bazelisk.sh build \
	--build_tests_only=false \
	--define DISABLE_VERILATOR_BUILD=true \
	--test_tag_filters=-broken,-cw310,-verilator,-dv \
	--target_pattern_file="$target_pattern_file"
	- name: Run software unit tests
	run: \|
	./bazelisk.sh test \
	--build_tests_only=false \
	--test_output=errors \
	--define DISABLE_VERILATOR_BUILD=true \
	--test_tag_filters=-broken,-cw310,-verilator,-dv,-silicon \
	--target_pattern_file="$target_pattern_file"
	- name: Publish Bazel test results
	uses: ./.github/actions/publish-bazel-test-results
	if: ${{ !cancelled() }}
	with:
	artifact-name: sw_build_test-test-results
	- name: Check for unrunnable tests
	run: ./ci/scripts/check-unrunnable-tests.sh
	continue-on-error: true

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[crypto] Harden RSA modexp subroutine. #3598

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[crypto] Harden RSA modexp subroutine. #3598

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