Index: scripts/crypt_setup.sh
===================================================================
diff -u -rcccff32c3345c85f48cc75c85eec37da5b9ce1de -r460049515fde52dba549364579d28e8593d9ed09
--- scripts/crypt_setup.sh	(.../crypt_setup.sh)	(revision cccff32c3345c85f48cc75c85eec37da5b9ce1de)
+++ scripts/crypt_setup.sh	(.../crypt_setup.sh)	(revision 460049515fde52dba549364579d28e8593d9ed09)
@@ -15,6 +15,8 @@
 #
 ############################################################################
 
+IS_MOUNTED=0
+
 ERR_CRYPTSETUP_UNKNOWN=100
 
 ERR_CRYPTSETUP_USAGE=101
@@ -32,12 +34,14 @@
 ERR_CRYPTSETUP_MOUNT_TYPE=131
 ERR_CRYPTSETUP_MOUNT_OPEN=132
 ERR_CRYPTSETUP_MOUNT_MOUNT=133
-ERR_CRYPTSETUP_MOUNT_MOUNT=134
+ERR_CRYPTSETUP_MOUNT_ISMOUNT=134 # is used in Application do not modify [DeviceController]
+ERR_CRYPTSETUP_MOUNT_CRC=135
 
 LOC_DEV="/dev/mmcblk0p7"
 LOC_DIR="configurations"
 LOC_MAP="/dev/mapper/"$LOC_DIR
 LOC_VAR="/var/"$LOC_DIR
+LOC_CRC="settings.crc"
 
 DEV_TYP="crypto_LUKS"
 DEV_MNT="/dev/mapper/configurations on /var/configurations type ext4 (rw,relatime)"
@@ -52,8 +56,9 @@
 function isMounted() {
     if [ "$( sudo mount | grep "$DEV_MNT" )" != "" ]; then
         echo "partition already mounted"
-        exit $ERR_CRYPTSETUP_MOUNT_MOUNT
+        return $IS_MOUNTED
     fi
+    return 1
 }
 
 function checkPassword() {
@@ -63,6 +68,23 @@
     fi
 }
 
+function checkShaSum() {
+    cd "$LOC_VAR"
+
+    if [ ! -f "$LOC_CRC" ]; then
+      echo "Settings CRC failed [crc file does not exists]"
+      exit $ERR_CRYPTSETUP_MOUNT_CRC
+    fi
+
+    out=$( sha256sum -c "$LOC_CRC" | grep "FAILED" )
+    cd -
+
+    if [ ! "$out" == "" ]; then
+      echo "Settings CRC FAILED"
+      exit $ERR_CRYPTSETUP_MOUNT_CRC
+    fi
+}
+
 function checkOutput() {
     if [ "$3" == "" ]; then
         out=`          eval "$1" 2>&1`
@@ -83,23 +105,23 @@
 
 function create_luks_partition()
 {
-    if [ "$( mount | grep "$DEV_MNT" )" != "" ]; then
-        unmount_luks_partition
-    fi
-    
+    isMounted && unmount_luks_partition
     checkOutput "sudo mkdir      -p         $LOC_VAR         " $ERR_CRYPTSETUP_CREATE_MKDIR
-    checkOutput "sudo cryptsetup luksFormat $LOC_DEV         " $ERR_CRYPTSETUP_CREATE_FORMAT     $PASSWORD
-    checkOutput "sudo cryptsetup luksOpen   $LOC_DEV $LOC_DIR" $ERR_CRYPTSETUP_CREATE_OPEN       $PASSWORD
+    checkOutput "sudo cryptsetup luksFormat $LOC_DEV         " $ERR_CRYPTSETUP_CREATE_FORMAT    $PASSWORD
+    checkOutput "sudo cryptsetup luksOpen   $LOC_DEV $LOC_DIR" $ERR_CRYPTSETUP_CREATE_OPEN      $PASSWORD
     checkOutput "sudo mkfs.ext4             $LOC_MAP         " $ERR_CRYPTSETUP_CREATE_MKFS
     checkOutput "sudo mount      -t ext4    $LOC_MAP $LOC_VAR" $ERR_CRYPTSETUP_CREATE_MOUNT
 }
 
 function mount_luks_partition()
 {
-    isEncrypted # if     encrypted  will continue else will exit with error
-    isMounted   # if not mounted    will continue else will exit with error
-    checkOutput "sudo cryptsetup luksOpen   $LOC_DEV $LOC_DIR" $ERR_CRYPTSETUP_MOUNT_OPEN        $PASSWORD
-    checkOutput "sudo mount      -t ext4    $LOC_MAP $LOC_VAR" $ERR_CRYPTSETUP_MOUNT_MOUNT   
+    isEncrypted                         # if     encrypted  will continue else will exit with error
+    isMounted                           # if     mounted    will echo and return 0=IS_MOUNTED
+    if [ ! $? -eq $IS_MOUNTED ]; then   # if not mounted, mount it
+        checkOutput "sudo cryptsetup luksOpen   $LOC_DEV $LOC_DIR" $ERR_CRYPTSETUP_MOUNT_OPEN   $PASSWORD
+        checkOutput "sudo mount      -t ext4    $LOC_MAP $LOC_VAR" $ERR_CRYPTSETUP_MOUNT_MOUNT
+    fi
+    checkShaSum                         # if checksum fails echos and exits
 }
 
 function handleCommand() {