Update detailed and simplified pipelines to use restored XMSS and XMSS^MT keys.

- Restores the pre-generated keys.
- Display what keys were restored.

Signed-off-by: Guiliano99 <[email protected]>

Author: Guiliano99

.github/workflows/python_detailed.yml

@@ -16,6 +16,8 @@ env:
   LD_LIBRARY_PATH: /usr/local/lib
   WIN_LIBOQS_INSTALL_PATH: C:\liboqs
   VERSION: 0.14.0
+  KEY_GEN_VERSION: 1
+  KEY_DIR: data/xmss_xmssmt_keys
 
 concurrency:
   group: test-python-detailed-${{ github.event_name == 'pull_request' && github.head_ref || github.sha }}
@@ -44,6 +46,25 @@ jobs:
       - name: Install dependencies
         run: uv sync --extra dev
 
+      # Restore the XMSS/XMSSMT key cache.
+      # Still allows the incomplete cache to be used to avoid regenerating keys.
+      # But if the complete cache is present, all keys are already generated and used.
+      - name: Restore XMSS/XMSSMT key cache
+        uses: actions/cache/restore@v4
+        with:
+          path: ${{ env.KEY_DIR }}
+          key: xmss-v${{ env.KEY_GEN_VERSION }}-complete
+          restore-keys: |
+            xmss-v${{ env.KEY_GEN_VERSION }}-progress-
+            xmss-v${{ env.KEY_GEN_VERSION }}-
+          enableCrossOsArchive: true
+
+      # Display the contents of the cache directory to verify what was restored.
+      - name: Show tree of cache directory
+        run: |
+          echo "Listing cache directory:"
+          ls -R data/xmss_xmssmt_keys
+
       - name: Install liboqs POSIX
         if: matrix.os != 'windows-latest'
         run: |

.github/workflows/python_simplified.yml

@@ -15,6 +15,9 @@ concurrency:
   group: test-python-simplified-${{ github.event_name == 'pull_request' && github.head_ref || github.sha }}
   cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
+env:
+  KEY_GEN_VERSION: 1
+  KEY_DIR: data/xmss_xmssmt_keys
 
 jobs:
   build:
@@ -36,6 +39,25 @@ jobs:
       - name: Set up Python 3.9
         run: uv python install 3.9
 
+      # Restore the XMSS/XMSSMT key cache.
+      # Still allows the incomplete cache to be used to avoid regenerating keys.
+      # But if the complete cache is present, all keys are already generated and used.
+      - name: Restore XMSS/XMSSMT key cache
+        uses: actions/cache/restore@v4
+        with:
+          path: ${{ env.KEY_DIR }}
+          key: xmss-v${{ env.KEY_GEN_VERSION }}-complete
+          restore-keys: |
+            xmss-v${{ env.KEY_GEN_VERSION }}-progress-
+            xmss-v${{ env.KEY_GEN_VERSION }}-
+          enableCrossOsArchive: true
+
+      # Display the contents of the cache directory to verify what was restored.
+      - name: Show tree of cache directory
+        run: |
+          echo "Listing cache directory:"
+          ls -R data/xmss_xmssmt_keys
+
       - name: Run examples
         run: |
           uv sync --extra dev