1#!/usr/bin/awk -f 2# SPDX-License-Identifier: GPL-2.0 3# 4# Copyright © 2020, Microsoft Corporation. All rights reserved. 5# 6# Author: Mickaël Salaün <mic@linux.microsoft.com> 7# 8# Check that a CONFIG_SYSTEM_BLACKLIST_HASH_LIST file contains a valid array of 9# hash strings. Such string must start with a prefix ("tbs" or "bin"), then a 10# colon (":"), and finally an even number of hexadecimal lowercase characters 11# (up to 128). 12 13BEGIN { 14 RS = "," 15} 16{ 17 if (!match($0, "^[ \t\n\r]*\"([^\"]*)\"[ \t\n\r]*$", part1)) { 18 print "Not a string (item " NR "):", $0; 19 exit 1; 20 } 21 if (!match(part1[1], "^(tbs|bin):(.*)$", part2)) { 22 print "Unknown prefix (item " NR "):", part1[1]; 23 exit 1; 24 } 25 if (!match(part2[2], "^([0-9a-f]+)$", part3)) { 26 print "Not a lowercase hexadecimal string (item " NR "):", part2[2]; 27 exit 1; 28 } 29 if (length(part3[1]) > 128) { 30 print "Hash string too long (item " NR "):", part3[1]; 31 exit 1; 32 } 33 if (length(part3[1]) % 2 == 1) { 34 print "Not an even number of hexadecimal characters (item " NR "):", part3[1]; 35 exit 1; 36 } 37} 38