Install OneRNG driver

src/freedombone

 # This can be empty, "beaglebone" or "onerng"
 HWRNG_TYPE=
 
+# Download location for OneRNG driver
+ONERNG_PACKAGE="onerng_3.3-1_all.deb"
+ONERNG_PACKAGE_DOWNLOAD="https://github.com/OneRNG/onerng.github.io/blob/master/sw/$ONERNG_PACKAGE?raw=true"
+# Hash for OneRNG driver
+ONERNG_PACKAGE_HASH='a9801993ffef1cc19778f5613f1837aca4212a0d299d75bd524134f865774928'
+
 # Whether this system is being installed within a docker container
 INSTALLED_WITHIN_DOCKER="no"
 
 }
 
 function install_onerng {
-  # TODO
+  apt-get -y install rng-tools at python-gnupg
+
+  # Move to the installation directory
+  if [ ! -d $INSTALL_DIR ]; then
+      mkdir $INSTALL_DIR
+  fi
+  cd $INSTALL_DIR
+
+  # Download the package
+  if [ ! -f $ONERNG_PACKAGE ]; then
+      wget $ONERNG_PACKAGE_DOWNLOAD
+  fi
+  if [ ! -f $ONERNG_PACKAGE ]; then
+      echo "OneRNG package could not be downloaded"
+      exit 59249
+  fi
+
+  # Check the hash
+  hash=$(sha256sum $ONERNG_PACKAGE)
+  if [[ $hash != $ONERNG_PACKAGE_HASH ]]; then
+      echo "OneRNG package: $ONERNG_PACKAGE"
+      echo "Hash does not match. This could indicate that the package has been tampered with."
+      echo "OneRNG expected package hash: $ONERNG_PACKAGE_HASH"
+      echo "OneRNG actual hash: $hash"
+      exit 25934
+  fi
+
+  # install the package
+  dpkg -i $ONERNG_PACKAGE
+
+  # Check that the install worked
+  if [ ! -f /etc/onerng.conf ]; then
+      echo 'OneRNG configuration file not found. The package may not have installed successfully.'
+      exit 42904
+  fi
 }
 
 function random_number_generator {

src/freedombone-config

 
   data=$(tempfile 2>/dev/null)
   trap "rm -f $data" 0 1 2 5 15
-  dialog --backtitle "Random Number Generation" \
-      --radiolist "Type of RNG:" 17 40 3 \
-      1 Haveged on \
-      2 Beaglebone built-in HRNG off \
-      3 OneRNG off 2> $data
+  if [[ $INSTALLING_ON_BBB == "no" ]]; then
+      dialog --backtitle "Random Number Generation" \
+          --radiolist "Type of RNG:" 17 40 3 \
+          1 Haveged on \
+          2 Beaglebone built-in HRNG off \
+          3 OneRNG off 2> $data
+  else
+      dialog --backtitle "Random Number Generation" \
+          --radiolist "Type of RNG:" 17 40 3 \
+          1 Haveged off \
+          2 Beaglebone built-in HRNG on \
+          3 OneRNG off 2> $data
+  fi
   sel=$?
   case $sel in
       1) exit 0;;