From d998bcbfb54bf5d129f6b88136729a2e2a23c19f Mon Sep 17 00:00:00 2001 From: Henri Beauchamp Date: Mon, 13 Feb 2023 18:34:00 +0100 Subject: SL-19110 revert LLUUID::combine() to old algorithm to match server code. (#75) As it happens, the change in the LLUUID::combine() algorithm introduced by one of my previous commits is causing invalid assets creation (seen with some clothing items, such as Shape and Universal types); obviously, the server is using the old algorithm for UUID validation purpose of these assets. This commit reverts LLUUID::combine() code to use LLMD5. --- indra/llcommon/lluuid.cpp | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'indra/llcommon/lluuid.cpp') diff --git a/indra/llcommon/lluuid.cpp b/indra/llcommon/lluuid.cpp index 47c6bc71c8..fc04dca08d 100644 --- a/indra/llcommon/lluuid.cpp +++ b/indra/llcommon/lluuid.cpp @@ -44,6 +44,7 @@ #include "lltimer.h" #include "llthread.h" #include "llmutex.h" +#include "llmd5.h" #include "hbxxh.h" const LLUUID LLUUID::null; @@ -400,11 +401,16 @@ LLUUID LLUUID::operator^(const LLUUID& rhs) const return id; } +// WARNING: this algorithm SHALL NOT be changed. It is also used by the server +// and plays a role in some assets validation (e.g. clothing items). Changing +// it would cause invalid assets. void LLUUID::combine(const LLUUID& other, LLUUID& result) const { - HBXXH128 hash((const void*)mData, 16, false); // false = do not finalize - hash.update((const void*)other.mData, 16); - hash.digest(result); + LLMD5 md5_uuid; + md5_uuid.update((unsigned char*)mData, 16); + md5_uuid.update((unsigned char*)other.mData, 16); + md5_uuid.finalize(); + md5_uuid.raw_digest(result.mData); } LLUUID LLUUID::combine(const LLUUID &other) const -- cgit v1.2.3