Added MD5 jni method

bindings/java/jni/dataModel_SleuthkitJNI.cpp

@@ -1277,6 +1277,30 @@ Java_org_sleuthkit_datamodel_SleuthkitJNI_getSectorSizeForImageNat(JNIEnv * env,
     return img_info->sector_size;
 }
 
+/*
+* Get the md5 hash of an image.
+*/
+JNIEXPORT jstring JNICALL
+Java_org_sleuthkit_datamodel_SleuthkitJNI_getMD5HashForImageNat(JNIEnv * env,
+    jclass obj, jlong a_img_info) {
+
+    TSK_IMG_INFO *img_info = castImgInfo(env, a_img_info);
+    if (img_info == 0) {
+        //exception already set
+        return 0;
+    }
+    // env->NewStringUTF(img_ptrs[i])
+#if HAVE_LIBEWF 
+    if (m_img_info->itype == TSK_IMG_TYPE_EWF_EWF) {
+        IMG_EWF_INFO *ewf_info = (IMG_EWF_INFO *)m_img_info;
+        if (ewf_info->md5hash_isset) {
+            return env->NewStringUTF(ewf_info->md5hash);
+        }
+    }
+#endif
+    return env->NewStringUTF("");
+}
+
 
 /*
  * Open the volume system at the given offset

bindings/java/jni/dataModel_SleuthkitJNI.h

@@ -359,6 +359,14 @@ JNIEXPORT jlong JNICALL Java_org_sleuthkit_datamodel_SleuthkitJNI_getTypeForImag
 JNIEXPORT jlong JNICALL Java_org_sleuthkit_datamodel_SleuthkitJNI_getSectorSizeForImageNat
   (JNIEnv *, jclass, jlong);
 
+/*
+ * Class:     org_sleuthkit_datamodel_SleuthkitJNI
+ * Method:    getMD5HashForImageNat
+ * Signature: (J)Ljava/lang/String;
+ */
+JNIEXPORT jstring JNICALL Java_org_sleuthkit_datamodel_SleuthkitJNI_getMD5HashForImageNat
+  (JNIEnv *, jclass, jlong);
+
 /*
  * Class:     org_sleuthkit_datamodel_SleuthkitJNI
  * Method:    closeImgNat

bindings/java/src/org/sleuthkit/datamodel/SleuthkitJNI.java

@@ -35,6 +35,7 @@
 import java.util.UUID;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
+import org.apache.commons.lang3.StringUtils;
 import org.sleuthkit.datamodel.TskData.TSK_FS_ATTR_TYPE_ENUM;
 import org.sleuthkit.datamodel.SleuthkitCase.CaseDbTransaction;
 
@@ -887,6 +888,9 @@ public static Image addImageToDatabase(SleuthkitCase skCase, String imagePath, i
 		long size = getSizeForImageNat(imageHandle);
 		long type = getTypeForImageNat(imageHandle);
 		long computedSectorSize = getSectorSizeForImageNat(imageHandle);
+		if (StringUtils.isEmpty(md5)) {
+			md5 = getMD5HashForImageNat(imageHandle);
+		}
 		
 		//  Now save to database
 		CaseDbTransaction transaction = skCase.beginTransaction();
@@ -906,6 +910,8 @@ public static Image addImageToDatabase(SleuthkitCase skCase, String imagePath, i
 			throw(ex);
 		}
 	}
+	
+	
 
 	/**
 	 * Get volume system Handle
@@ -2063,6 +2069,8 @@ public static long openFile(long fsHandle, long fileId, TSK_FS_ATTR_TYPE_ENUM at
 	private static native long getTypeForImageNat(long imgHandle);
 	
 	private static native long getSectorSizeForImageNat(long imgHandle);
+	
+	private static native String getMD5HashForImageNat(long imgHandle);
 
 	private static native void closeImgNat(long imgHandle);