2 files changed, 47 insertions, 0 deletions
diff --git a/util/chromeos/README.md b/util/chromeos/README.md
index 7a3897d8a0..0b9a7d74d8 100644
--- a/util/chromeos/README.md
+++ b/util/chromeos/README.md
@@ -26,3 +26,19 @@ $ ./crosfirmware.sh panther
 
 Right now it will produce the ME firmware blob, IFD, VGA option rom,
 and `mrc.bin`.
+
+## gen_test_hwid.sh
+
+`gen_test_hwid.sh` generates a test-only identifier in Chrome OS HWID v2
+compatible format.
+
+Usage:
+```
+$ ./gen_test_hwid.sh BOARD_NAME
+```
+
+Example:
+```
+$ ./gen_test_hwid.sh Kukui
+KUKUI TEST 9847
+```
diff --git a/util/chromeos/gen_test_hwid.sh b/util/chromeos/gen_test_hwid.sh
new file mode 100755
index 0000000000..849ff6a8c0
--- /dev/null
+++ b/util/chromeos/gen_test_hwid.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# This file is part of the coreboot project.
+#
+# Copyright 2019 Google Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+main() {
+  if [ "$#" != 1 ]; then
+    echo "Usage: $0 MAINBOARD_PARTNUMBER" >&2
+    exit 1
+  fi
+
+  # Generate a test-only Chrome OS HWID v2 string
+  local board="$1"
+  local prefix="$(echo "${board}" | tr a-z A-Z) TEST"
+  # gzip has second-to-last 4 bytes in CRC32.
+  local crc32="$(printf "${prefix}" | gzip -1 | tail -c 8 | head -c 4 | \
+		 hexdump -e '1/4 "%04u" ""' | tail -c 4)"
+
+  echo "${prefix}" "${crc32}"
+}
+main "$@"