Feature/import export encryption (#1533)

Add option to encrypt repository exports with a password and add possibility to decrypt them on repository import. Also make the repository export asynchronous. This implies that the repository export will be created on the server and can be downloaded multiple times. The repository export will be deleted automatically 10 days after creation.

scm-dao-xml/src/main/java/sonia/scm/store/ExportableBlobFileStore.java

@@ -33,6 +33,8 @@ import static java.util.Optional.of;
 
 class ExportableBlobFileStore extends ExportableDirectoryBasedFileStore {
 
+  private static final String EXCLUDED_EXPORT_STORE = "repository-export";
+
   static final Function<StoreType, Optional<Function<Path, ExportableStore>>> BLOB_FACTORY =
     storeType -> storeType == StoreType.BLOB ? of(ExportableBlobFileStore::new) : empty();
 
@@ -46,6 +48,9 @@ class ExportableBlobFileStore extends ExportableDirectoryBasedFileStore {
   }
 
   boolean shouldIncludeFile(Path file) {
+    if (getDirectory().toString().endsWith(EXCLUDED_EXPORT_STORE)) {
+      return false;
+    }
     return file.getFileName().toString().endsWith(".blob");
   }
 }

scm-dao-xml/src/main/java/sonia/scm/store/ExportableDirectoryBasedFileStore.java

@@ -73,4 +73,8 @@ abstract class ExportableDirectoryBasedFileStore implements ExportableStore {
       putFileContentIntoStream(exporter, fileOrDir);
     }
   }
+
+  protected Path getDirectory() {
+    return directory;
+  }
 }

scm-dao-xml/src/test/java/sonia/scm/store/ExportableBlobFileStoreTest.java

@@ -0,0 +1,70 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.store;
+
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ExportableBlobFileStoreTest {
+
+  @Test
+  void shouldIgnoreStoreIfExcludedStore() {
+    Path dir = Paths.get("test/path/repository-export");
+    ExportableBlobFileStore exportableBlobFileStore = new ExportableBlobFileStore(dir);
+
+    Path file = Paths.get(dir.toString(), "some.blob");
+    boolean result = exportableBlobFileStore.shouldIncludeFile(file);
+
+    assertThat(result).isFalse();
+  }
+
+  @Test
+  void shouldIgnoreStoreIfNotBlob() {
+    Path dir = Paths.get("test/path/any-store");
+    ExportableBlobFileStore exportableBlobFileStore = new ExportableBlobFileStore(dir);
+
+    Path file = Paths.get(dir.toString(), "some.unblob");
+    boolean result = exportableBlobFileStore.shouldIncludeFile(file);
+
+    assertThat(result).isFalse();
+  }
+
+  @Test
+  void shouldIncludeStore() {
+    Path dir = Paths.get("test/path/any-blob-store");
+    ExportableBlobFileStore exportableBlobFileStore = new ExportableBlobFileStore(dir);
+
+    Path file = Paths.get(dir.toString(), "some.blob");
+    boolean result = exportableBlobFileStore.shouldIncludeFile(file);
+
+    assertThat(result).isTrue();
+  }
+
+}