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/*-
* ============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);
}
}
}
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