| #!/bin/sh |
| # Copyright 2019 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| # |
| # This script reads S/N vNVRAM data from cr50 as a part of the factory process. |
| # The data is printed as vvvvvv:rr:ss..ss, where |
| # vvvvvv is the hex representation of the 3 version bytes, |
| # rr is the hex representation of the RMA status byte, |
| # ss..SS is the hex representation of SN Bits (12 bytes). |
| |
| PLATFORM_INDEX=false |
| TPM_READSPACE="/usr/share/cros/tpm2-read-space.sh" |
| |
| if ! sn_bits="$(${TPM_READSPACE} 013fff01 16)"; then |
| >&2 echo "Failed to read SN Bits space" |
| exit 1 |
| fi |
| |
| standalone_rma_bytes="" |
| if [ "${PLATFORM_INDEX}" = true ]; then |
| if ! standalone_rma_bytes="$(${TPM_READSPACE} 013fff04 4)"; then |
| >&2 echo "Failed to read RMA Bytes space" |
| exit 1 |
| fi |
| fi |
| |
| sn_data_version="$(echo "${sn_bits}" | cut -b 1-6)" |
| rma_status="$(echo "${sn_bits}" | cut -b 7-8)" |
| sn_bits="$(echo "${sn_bits}" | cut -b 9-)" |
| # For non-platform index case, ${standalone_rma_bytes} is empty; use `xargs` to trim the space at tail. |
| echo "${sn_data_version}:${rma_status}:${sn_bits} ${standalone_rma_bytes}" | xargs |
