expect/signer-id.exp

#
# Copyright (c) 2023, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
# Expect script for Linux/Buildroot using Measured Boot & fTPM
#

source [file join [file dirname [info script]] utils.inc]

set uart_log_file 	[get_param uart_log_file]
#Open file to read line by line
set fh 			[open $uart_log_file r]
set signer_id 		"signer_id"
set signer_id_0_15	"- signer_id (\\s|\\w)*:(?!(\\s00){16})(\\s(\[0-9a-f\]){2}){16}"
set signer_id_frag 	"(\\s|\\w)*:(\\s|\\w)*:(?!(\\s00){16})(\\s(\[0-9a-f\]){2}){16}"
set non_zero_val 	0
set signer_id_detect 	0
set version_string	"- version (\\s|\\w)*:"

#Open file to read line by line
set uart_log_file [get_param uart_log_file]
set fh [open $uart_log_file r]

# Loop to read and process line by line
while {[gets $fh line] != -1} {

	if {[regexp $signer_id $line]} {
		incr signer_id_detect
	}

	if {[regexp $signer_id_0_15 $line] && $signer_id_detect == 1} {
		send "signer_id(0:15) is non-zero\n"
		incr non_zero_val
		continue
	}

	if {[regexp $signer_id_frag $line] && $signer_id_detect == 1} {
		send "signer_id fragment is non-zero\n"
		incr non_zero_val
		continue
	}

	if {[regexp $version_string $line]} {
		if {$non_zero_val eq 0} {
			send "either value is zero\n"
			exit_uart -1
		} else {
			send "either value is non-zero\n"
			set non_zero_val 0
		}
		set signer_id_detect 0
	}

	if {[string match "*Booting BL31*" $line]} {
		send "Stop. BL31 booting"
	}
}

close $fh