TT#54410 Get rid of hardcoded checksum of sipwise.gpg file

We want to get rid of old sipwise gpg file as it contains weak key. To
do it we need either update this hardcoded value (and do it every time
when key is updated) or use the same behavior as it's used in
installer.

Change-Id: I4eba8a22cbc0b620b468fc133c07800d7f671cac

templates/scripts/includes/deployment.sh

@@ -93,8 +93,6 @@ VIRTUALBOX_DIR="/usr/share/virtualbox"
 VIRTUALBOX_ISO="VBoxGuestAdditions_5.1.26.iso"
 VIRTUALBOX_ISO_CHECKSUM="6df8c8ab6e7ac3a70a5e29116f8a5dcdb7dfbd0b226ef849a5cd9502e956b06f" # sha256
 VIRTUALBOX_ISO_URL_PATH="/files/${VIRTUALBOX_ISO}"
-SIPWISE_APT_KEY_CHECKSUM_OLD="f4cdbe4994ae8ca6c4b24eb164e82a20579b335da4eca0907ecaace832e9a0a7" # sha256
-SIPWISE_APT_KEY_CHECKSUM_NEW="c3b8271ec7cfd8debfd3ffcb1604a952cdf8c1033511e449684658c866eff6d8" # sha256
 SIPWISE_APT_KEY_PATH="/etc/apt/trusted.gpg.d/sipwise.gpg"
 # overriden later, although since the checksum is the same we could use this URL
 # also for Pro/Carrier installations
@@ -193,18 +191,29 @@ install_sipwise_key() {
     echo "Sipwise keyring not found, downloading."
   fi
 
+  local tmp_key
+  tmp_key="$(mktemp)"
+
   for try in 1 2 3; do
-    wget --retry-connrefused --no-verbose -O "${SIPWISE_APT_KEY_PATH}" "${SIPWISE_URL}${SIPWISE_APT_KEY_URL_PATH}"
-    sipwise_key_checksum=$(sha256sum "${SIPWISE_APT_KEY_PATH}" | awk '{print $1}')
 
-    if [[ "${sipwise_key_checksum}" != "${SIPWISE_APT_KEY_CHECKSUM_OLD}" && \
-          "${sipwise_key_checksum}" != "${SIPWISE_APT_KEY_CHECKSUM_NEW}" ]] ; then
-      echo "Sipwise keyring downloaded has wrong checksum (expected: [${SIPWISE_APT_KEY_CHECKSUM}] - got: [${sipwise_key_checksum}]), retry $try" >&2
-    else
-      echo "Sipwise keyring downloaded with expected checksum (sha256sum: [${sipwise_key_checksum}]), debootstrap sipwise key"
-      debootstrap_sipwise_key
-      return
+    wget -q -T 10 --retry-connrefused --tries=3 --no-verbose -O "${tmp_key}" "${SIPWISE_URL}${SIPWISE_APT_KEY_URL_PATH}"
+    chmod 644 "${tmp_key}"
+    local sipwise_key_checksum
+    sipwise_key_checksum=$(sha256sum "${tmp_key}" | awk '{print $1}')
+    echo "Sipwise keyring downloaded with checksum (sha256sum: [${sipwise_key_checksum}]). Is it correct and should be imported into the system? [y/N]"
+
+    if "${INTERACTIVE}"; then
+      local a
+      read -r a
+      if [[ "${a,,}" != "y" ]] ; then
+        echo "The key wasn't accepted, retrying... ${try}/3"
+        continue
+      fi
     fi
+    echo "The key has been accepted, installing it as /etc/apt/trusted.gpg.d/sipwise.gpg"
+    debootstrap_sipwise_key
+    mv "${tmp_key}" "${SIPWISE_APT_KEY_PATH}"
+    return
   done
 
   die "Error validating sipwise keyring for apt usage, aborting installation."