fix: verify release checksums during install

.github/workflows/release.yml

@@ -66,6 +66,12 @@ jobs:
           else
             tar -C bin -czf "dist/ucloud-sandbox-cli_${GOOS}_${GOARCH}.tar.gz" ucloud-sandbox-cli
           fi
+          if [ "$GOOS" = "windows" ]; then
+            asset="dist/ucloud-sandbox-cli_${GOOS}_${GOARCH}.zip"
+          else
+            asset="dist/ucloud-sandbox-cli_${GOOS}_${GOARCH}.tar.gz"
+          fi
+          sha256sum "$asset" | awk '{ print $1 }' > "${asset}.sha256"
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4
@@ -74,6 +80,7 @@ jobs:
           path: |
             dist/*.tar.gz
             dist/*.zip
+            dist/*.sha256
           if-no-files-found: error
 
   release:
@@ -100,7 +107,7 @@ jobs:
           GH_REPO: ${{ github.repository }}
           TAG_NAME: ${{ github.ref_name }}
         run: |
-          gh release create "${TAG_NAME}" dist/*.tar.gz dist/*.zip \
+          gh release create "${TAG_NAME}" dist/*.tar.gz dist/*.zip dist/*.sha256 \
             --draft \
             --verify-tag \
             --title "${TAG_NAME}" \

install.ps1

@@ -112,9 +112,11 @@ $downloadUrl = if ($Version -eq "latest") {
 } else {
     "$releaseBaseUrl/download/$Version/$assetName"
 }
+$checksumUrl = "$downloadUrl.sha256"
 $targetBinary = Join-Path $InstallDir "$BinaryName.exe"
 $tempDir = Join-Path ([IO.Path]::GetTempPath()) "$BinaryName-install-$([Guid]::NewGuid().ToString('N'))"
 $archivePath = Join-Path $tempDir $assetName
+$checksumPath = "$archivePath.sha256"
 $extractDir = Join-Path $tempDir "extract"
 
 Write-Host ""
@@ -135,6 +137,17 @@ try {
 
     Write-Info "Downloading $BinaryName..."
     Invoke-WebRequest -Uri $downloadUrl -OutFile $archivePath -UseBasicParsing
+    Invoke-WebRequest -Uri $checksumUrl -OutFile $checksumPath -UseBasicParsing
+
+    Write-Info "Verifying release SHA256..."
+    $expectedHash = (Get-Content -LiteralPath $checksumPath -Raw).Trim().ToLowerInvariant()
+    if ($expectedHash -notmatch "^[0-9a-f]{64}$") {
+        throw "Release checksum must contain exactly 64 hexadecimal characters."
+    }
+    $actualHash = (Get-FileHash -LiteralPath $archivePath -Algorithm SHA256).Hash.ToLowerInvariant()
+    if ($actualHash -ne $expectedHash) {
+        throw "SHA256 verification failed for the downloaded release asset."
+    }
 
     Write-Info "Installing $BinaryName to $InstallDir..."
     Expand-Archive -LiteralPath $archivePath -DestinationPath $extractDir -Force

install.sh

@@ -158,6 +158,40 @@ download() {
 	fi
 }
 
+verify_sha256() {
+	file="$1"
+	checksum_file="$2"
+	expected="$(tr -d '[:space:]' <"$checksum_file" | tr '[:upper:]' '[:lower:]')"
+
+	case "$expected" in
+		*[!0-9a-f]* | "")
+			error "Release checksum is invalid."
+			exit 1
+			;;
+	esac
+	if [ "${#expected}" -ne 64 ]; then
+		error "Release checksum must contain exactly 64 hexadecimal characters."
+		exit 1
+	fi
+
+	if has sha256sum; then
+		actual="$(sha256sum "$file" | awk '{ print $1 }')"
+	elif has shasum; then
+		actual="$(shasum -a 256 "$file" | awk '{ print $1 }')"
+	elif has openssl; then
+		actual="$(openssl dgst -sha256 "$file" | awk '{ print $NF }')"
+	else
+		error "No SHA256 implementation was found (sha256sum, shasum, or openssl)."
+		exit 1
+	fi
+
+	actual="$(printf '%s' "$actual" | tr '[:upper:]' '[:lower:]')"
+	if [ "$actual" != "$expected" ]; then
+		error "SHA256 verification failed for the downloaded release asset."
+		exit 1
+	fi
+}
+
 make_tmp_dir() {
 	if ! has mktemp; then
 		error "mktemp was not found."
@@ -360,6 +394,7 @@ main() {
 	trap cleanup EXIT INT TERM
 
 	archive="${TMP_DIR}/${BINARY_NAME}.tar.gz"
+	checksum="${archive}.sha256"
 	info "Downloading ${BINARY_NAME}..."
 	if ! download "$archive" "$URL"; then
 		error "Download failed: $URL"
@@ -368,6 +403,12 @@ main() {
 		fi
 		exit 1
 	fi
+	if ! download "$checksum" "${URL}.sha256"; then
+		error "Checksum download failed: ${URL}.sha256"
+		exit 1
+	fi
+	info "Verifying release SHA256..."
+	verify_sha256 "$archive" "$checksum"
 
 	info "Installing ${BINARY_NAME} to ${BIN_DIR}..."
 	install_binary "$archive"