fix: update artifact server to address GHSL-2023-004 (#1565)

pkg/artifacts/testdata/GHSL-2023-004/artifacts.yml

@@ -0,0 +1,43 @@
+
+name: "GHSL-2023-0004"
+on: push
+
+jobs:
+  test-artifacts:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "hello world" > test.txt
+      - name: curl upload
+        uses: wei/curl@v1
+        with:
+          args: -s --fail ${ACTIONS_RUNTIME_URL}upload/1?itemPath=../../my-artifact/secret.txt --upload-file test.txt
+      - uses: actions/download-artifact@v2
+        with:
+          name: my-artifact
+          path: test-artifacts
+      - name: 'Verify Artifact #1'
+        run: |
+          file="test-artifacts/secret.txt"
+          if [ ! -f $file ] ; then
+            echo "Expected file does not exist"
+            exit 1
+          fi
+          if [ "$(cat $file)" != "hello world" ] ; then
+            echo "File contents of downloaded artifact are incorrect"
+            exit 1
+          fi
+      - name: Verify download should work by clean extra dots
+        uses: wei/curl@v1
+        with:
+          args: --path-as-is -s -o out.txt --fail ${ACTIONS_RUNTIME_URL}artifact/1/../../../1/my-artifact/secret.txt
+      - name: 'Verify download content'
+        run: |
+          file="out.txt"
+          if [ ! -f $file ] ; then
+            echo "Expected file does not exist"
+            exit 1
+          fi
+          if [ "$(cat $file)" != "hello world" ] ; then
+            echo "File contents of downloaded artifact are incorrect"
+            exit 1
+          fi