1 files changed, 63 insertions, 0 deletions
diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/ftp/SftpClientSettings.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/ftp/SftpClientSettings.java
new file mode 100644
index 00000000..8cab4327
--- /dev/null
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/ftp/SftpClientSettings.java
@@ -0,0 +1,63 @@
+/*-
+ * ============LICENSE_START======================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ===============================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions
+ * and limitations under the License.
+ * ============LICENSE_END========================================================================
+ */
+
+package org.onap.dcaegen2.collectors.datafile.ftp;
+
+import java.io.File;
+import org.onap.dcaegen2.collectors.datafile.configuration.SftpConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SftpClientSettings {
+
+    private static final Logger logger = LoggerFactory.getLogger(SftpClientSettings.class);
+
+    private final SftpConfig sftpConfig;
+
+    public SftpClientSettings(SftpConfig sftpConfig) {
+        this.sftpConfig = sftpConfig;
+    }
+
+    public boolean shouldUseStrictHostChecking() {
+        boolean strictHostKeyChecking = false;
+        if (isStrictHostKeyCheckingEnabled()) {
+            File file = new File(getKnownHostsFilePath());
+            strictHostKeyChecking = file.isFile();
+            logUsageOfStrictHostCheckingFlag(strictHostKeyChecking, file.getAbsolutePath());
+        } else {
+            logger.info("StrictHostKeyChecking will be disabled.");
+        }
+        return strictHostKeyChecking;
+    }
+
+    public String getKnownHostsFilePath() {
+        return this.sftpConfig.knownHostsFilePath();
+    }
+
+    private boolean isStrictHostKeyCheckingEnabled() {
+        return Boolean.TRUE.equals(this.sftpConfig.strictHostKeyChecking());
+    }
+
+    private void logUsageOfStrictHostCheckingFlag(boolean strictHostKeyChecking, String filePath) {
+        if (strictHostKeyChecking) {
+            logger.info("StrictHostKeyChecking will be enabled with KNOW_HOSTS_FILE_PATH [{}].", filePath);
+        } else {
+            logger.warn(
+                "StrictHostKeyChecking is enabled but environment variable KNOW_HOSTS_FILE_PATH is not set or points to not existing file [{}]  -->  falling back to StrictHostKeyChecking='no'.",
+                filePath);
+        }
+    }
+}