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[CPU] Check patch MediaID if patch signature check failed 

This should let us make sure patches are being applied to the right XEX, without needing to rely on the signature.
This commit is contained in:
emoose 2020-01-05 20:44:31 +00:00 committed by illusion
parent efcf61aa9f
commit f766500e62
1 changed files with 10 additions and 0 deletions
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10
src/xenia/cpu/xex_module.cc
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@ -215,6 +215,16 @@ int XexModule::ApplyPatch(XexModule* module) {
s.finalize(digest); s.finalize(digest);
if (memcmp(digest, patch_header->digest_source, 0x14) != 0) { if (memcmp(digest, patch_header->digest_source, 0x14) != 0) {
// If the signature check failed, check against the MediaID
// (we can forgive signature not matching)
// we won't check MediaID if the sig matches though, since it might not be
// that reliable?
if (memcmp(xex_security_info()->xgd2_media_id,
module->xex_security_info()->xgd2_media_id, 0x10) != 0) {
XELOGE("Patch MediaID doesn't match base XEX MediaID, aborting patch");
return 1;
}
XELOGW( XELOGW(
"XEX patch signature hash doesn't match base XEX signature hash, patch " "XEX patch signature hash doesn't match base XEX signature hash, patch "
"will likely fail!"); "will likely fail!");