Factor secret key file reader into separate class and add cli utility…

… to generate value used

Model/bin/readSecretKey

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+fgpJava org.gusdb.wdk.model.config.SecretKeyReader $@

Model/src/main/java/org/gusdb/wdk/model/config/ModelConfig.java

@@ -1,15 +1,12 @@
 package org.gusdb.wdk.model.config;
 
-import java.io.FileReader;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.List;
 import java.util.Optional;
 
 import org.apache.log4j.Logger;
-import org.gusdb.fgputil.EncryptionUtil;
 import org.gusdb.fgputil.FormatUtil;
-import org.gusdb.fgputil.IoUtil;
 import org.gusdb.fgputil.Named.NamedObject;
 import org.gusdb.oauth2.client.KeyStoreTrustManager.KeyStoreConfig;
 import org.gusdb.oauth2.client.OAuthConfig;
@@ -302,8 +299,8 @@ public ModelConfigAppDB getAppDB() {
    */
   public String getSecretKey() {
     if (_secretKey == null && _secretKeyFile.isPresent()) {
-      try (FileReader in = new FileReader(_secretKeyFile.get().toFile())) {
-        _secretKey = EncryptionUtil.md5(IoUtil.readAllChars(in).strip());
+      try {
+        _secretKey = SecretKeyReader.readSecretKey(_secretKeyFile);
       }
       catch (IOException e) {
         // log error but otherwise ignore so null is returned; problem may be remedied in the future

Model/src/main/java/org/gusdb/wdk/model/config/SecretKeyReader.java

@@ -0,0 +1,35 @@
+package org.gusdb.wdk.model.config;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+
+import org.gusdb.fgputil.EncryptionUtil;
+import org.gusdb.fgputil.IoUtil;
+
+public class SecretKeyReader {
+
+  public static void main(String[] args) {
+    if (args.length != 1) {
+      System.err.println("USAGE: readSecretKey <path-to-secret-key-file>");
+      System.exit(1);
+    }
+    Path path = Paths.get(args[0]);
+    try {
+      System.out.print(readSecretKey(Optional.of(path)));
+    }
+    catch (Exception e) {
+      e.printStackTrace(System.err);
+      System.exit(2);
+    }
+  }
+
+  public static String readSecretKey(Optional<Path> secretKeyFile) throws IOException {
+    try (FileReader in = new FileReader(secretKeyFile.get().toFile())) {
+      return EncryptionUtil.md5(IoUtil.readAllChars(in).strip());
+    }
+  }
+
+}