xar unarchiver (.xar, .pkg, .xip)
add toc checksumming
+6
-3
+6
-3
czar.cr
+6
-3
czar.cr
···
148
148
file.seek heap_start + xar.checksum.offset
149
149
stored_checksum_data = Bytes.new(xar.checksum.size)
150
150
file.read(stored_checksum_data)
151
-
stored_checksum = String.new(stored_checksum_data).strip
151
+
stored_checksum = stored_checksum_data.hexstring
152
152
153
153
if calculated.downcase == stored_checksum.downcase
154
154
puts "✓ Heap checksum valid (#{xar.checksum.style})"
···
263
263
zfile.read toc_data
264
264
end
265
265
266
-
# TODO: toc checksum
267
-
268
266
xar_xml = XML.parse String.new(toc_data)
269
267
xar_obj = xml_select(xar_xml, "xar")
270
268
perror "empty xar object" if xar_obj.empty?
···
281
279
xar.checksum.size = xml_value(elem, "size").first.to_u64
282
280
xar.checksum.offset = xml_value(elem, "offset").first.to_u64
283
281
puts "TOC is checksummed as #{xar.checksum.style}, #{xar.checksum.size} bytes at offset #{xar.checksum.offset}"
282
+
283
+
file.seek xar.checksum.offset
284
+
toc_checksum = Bytes.new xar.checksum.size
285
+
file.read(toc_checksum)
286
+
validate_checksum(toc_data, toc_checksum.hexstring, xar.checksum.style, "TOC")
284
287
285
288
xml_select(toc, "file").each do |entity|
286
289
xar.files += xar_decode_file entity