1 files changed, 40 insertions, 0 deletions
diff --git a/src/main/java/de/torui/coflsky/utils/FileUtils.java b/src/main/java/de/torui/coflsky/utils/FileUtils.java
new file mode 100644
index 0000000..1541a75
--- /dev/null
+++ b/src/main/java/de/torui/coflsky/utils/FileUtils.java
@@ -0,0 +1,40 @@
+package de.torui.coflsky.utils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.security.MessageDigest;
+
+public class FileUtils {
+
+    public static byte[] createChecksum(File file) throws Exception {
+        InputStream fis =  new FileInputStream(file);
+
+        byte[] buffer = new byte[1024];
+        MessageDigest complete = MessageDigest.getInstance("MD5");
+        int numRead;
+
+        do {
+            numRead = fis.read(buffer);
+            if (numRead > 0) {
+                complete.update(buffer, 0, numRead);
+            }
+        } while (numRead != -1);
+
+        fis.close();
+        return complete.digest();
+    }
+
+
+    public static String getMD5Checksum(File file) throws Exception {
+        byte[] b = createChecksum(file);
+        String result = "";
+
+        for (int i=0; i < b.length; i++) {
+            result += Integer.toString( ( b[i] & 0xff ) + 0x100, 16).substring( 1 );
+        }
+        return result;
+    }
+
+
+}