From 1fa69220ed10e769819d13c155d271eb28a06640 Mon Sep 17 00:00:00 2001
From: Richard Cordovano <rcordovano@basistech.com>
Date: Thu, 21 Jul 2016 15:11:13 -0400
Subject: [PATCH] Add new drive and time zone utility classes

---
 .../autopsy/coreutils/DriveUtils.java         | 91 +++++++++++++++++++
 .../autopsy/coreutils/TimeZoneUtils.java      | 69 ++++++++++++++
 2 files changed, 160 insertions(+)
 create mode 100644 Core/src/org/sleuthkit/autopsy/coreutils/DriveUtils.java
 create mode 100644 Core/src/org/sleuthkit/autopsy/coreutils/TimeZoneUtils.java

diff --git a/Core/src/org/sleuthkit/autopsy/coreutils/DriveUtils.java b/Core/src/org/sleuthkit/autopsy/coreutils/DriveUtils.java
new file mode 100644
index 0000000000..950ffb5bcd
--- /dev/null
+++ b/Core/src/org/sleuthkit/autopsy/coreutils/DriveUtils.java
@@ -0,0 +1,91 @@
+/*
+ * Autopsy Forensic Browser
+ *
+ * Copyright 2011-2016 Basis Technology Corp.
+ * Contact: carrier <at> sleuthkit <dot> org
+ *
+ * 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.
+ */
+package org.sleuthkit.autopsy.coreutils;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+/**
+ * Utility methods for working with drives.
+ */
+public class DriveUtils {
+
+    private static final String PDISK = "\\\\.\\physicaldrive"; //NON-NLS
+    private static final String DEV = "/dev/"; //NON-NLS
+    private static final String PARTITION = "\\\\.\\";
+    private static final String COLON = ":";
+
+    /**
+     * Determines whether or not a given path is for a physical drive.
+     *
+     * @param path The path to test.
+     *
+     * @return True or false.
+     */
+    public static boolean isPhysicalDrive(String path) {
+        return path.toLowerCase().startsWith(PDISK) || path.toLowerCase().startsWith(DEV);
+    }
+
+    /**
+     * Determines whether or not a given path is for a local drive or partition.
+     *
+     * @param path The path to test.
+     *
+     * @return True or false.
+     */
+    public static boolean isPartition(String path) {
+        return path.toLowerCase().startsWith(PARTITION) && path.toLowerCase().endsWith(COLON);
+    }
+
+    /**
+     * Determines whether or not a drive exists by eading the first byte and
+     * checking if it is a -1.
+     *
+     * @param path The path to test.
+     *
+     * @return True or false.
+     */
+    public static boolean driveExists(String path) {
+        BufferedInputStream br = null;
+        try {
+            File tmp = new File(path);
+            br = new BufferedInputStream(new FileInputStream(tmp));
+            int b = br.read();
+            return b != -1;
+        } catch (Exception ex) {
+            return false;
+        } finally {
+            try {
+                if (br != null) {
+                    br.close();
+                }
+            } catch (IOException ex) {
+            }
+        }
+    }
+
+    /**
+     * Prevents instantiation.
+     */
+    private DriveUtils() {
+
+    }
+}
diff --git a/Core/src/org/sleuthkit/autopsy/coreutils/TimeZoneUtils.java b/Core/src/org/sleuthkit/autopsy/coreutils/TimeZoneUtils.java
new file mode 100644
index 0000000000..fa175a995a
--- /dev/null
+++ b/Core/src/org/sleuthkit/autopsy/coreutils/TimeZoneUtils.java
@@ -0,0 +1,69 @@
+/*
+ * Autopsy Forensic Browser
+ *
+ * Copyright 2011-2016 Basis Technology Corp.
+ * Contact: carrier <at> sleuthkit <dot> org
+ *
+ * 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.
+ */
+package org.sleuthkit.autopsy.coreutils;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.GregorianCalendar;
+
+/**
+ * Utility methods for workig with time zones.
+ */
+public class TimeZoneUtils {
+
+    /**
+     * Converts a Java timezone id to a coded string with only alphanumeric
+     * characters. Example: "America/New_York" is converted to "EST5EDT" by this
+     * method.
+     *
+     * @param timeZoneId The time zone id.
+     *
+     * @return The converted time zone string.
+     */
+    public static String convertToAlphaNumericFormat(String timeZoneId) {
+
+        java.util.TimeZone zone = java.util.TimeZone.getTimeZone(timeZoneId);
+        int offset = zone.getRawOffset() / 1000;
+        int hour = offset / 3600;
+        int min = (offset % 3600) / 60;
+
+        DateFormat dfm = new SimpleDateFormat("z");
+        dfm.setTimeZone(zone);
+        boolean hasDaylight = zone.useDaylightTime();
+        String first = dfm.format(new GregorianCalendar(2010, 1, 1).getTime()).substring(0, 3); 
+        String second = dfm.format(new GregorianCalendar(2011, 6, 6).getTime()).substring(0, 3);
+        int mid = hour * -1;
+        String result = first + Integer.toString(mid);
+        if (min != 0) {
+            result = result + ":" + Integer.toString(min);
+        }
+        if (hasDaylight) {
+            result += second;
+        }
+
+        return result;
+    }
+
+    /**
+     * Prevents instantiation.
+     */
+    private TimeZoneUtils() {
+
+    }
+}