Initial commit

meta-google/recipes-phosphor/flash/inplace-gbmc-update/inplace-gbmc-verify.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# This script will check the signature for the BMC image against
+# the baked in keyring available.  If any aspect of this fails,
+# the scripts returns non-zero and this can be reported to the
+# host.
+#
+# 1. Verify the image
+# 2. Rename the image
+
+SIGNATURE_FILE=/tmp/bmc.sig
+STATUS_FILE=/tmp/bmc.verify
+
+# Store in /run/initramfs because the behaviour of mv changes
+# depending on whether the file is moving within a tree or not.
+IMAGE_FILE=/run/initramfs/bmc-image
+VERIFIED_FILE=/run/initramfs/image-bmc
+
+# Make sure we run ERR traps when a function returns an error
+set -e
+
+# Write out the result of the script to a status file upon exiting
+# normally or due to an error
+exit_handler() {
+  local status="$?"
+  if (( status == 0 )); then
+    echo "success" >"${STATUS_FILE}"
+  else
+    echo "failed" >"${STATUS_FILE}"
+  fi
+  trap - EXIT ERR
+  exit "$status"
+}
+trap exit_handler EXIT ERR
+
+echo "running" > ${STATUS_FILE}
+
+# Verify the image.
+verify-bmc-image.sh @ALLOW_DEV@ "$IMAGE_FILE" "$SIGNATURE_FILE" || exit
+
+# Rename the staged file for initramfs updates.
+mv ${IMAGE_FILE} ${VERIFIED_FILE}