diff options
Diffstat (limited to 'indra/llcommon/lluuid.cpp')
| -rw-r--r-- | indra/llcommon/lluuid.cpp | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/indra/llcommon/lluuid.cpp b/indra/llcommon/lluuid.cpp index 6f9e09a587..fc04dca08d 100644 --- a/indra/llcommon/lluuid.cpp +++ b/indra/llcommon/lluuid.cpp @@ -40,11 +40,12 @@ #include "lluuid.h" #include "llerror.h" #include "llrand.h" -#include "llmd5.h" #include "llstring.h" #include "lltimer.h" #include "llthread.h" #include "llmutex.h" +#include "llmd5.h" +#include "hbxxh.h" const LLUUID LLUUID::null; const LLTransactionID LLTransactionID::tnull; @@ -400,6 +401,9 @@ 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 { LLMD5 md5_uuid; @@ -857,17 +861,12 @@ void LLUUID::generate() tmp >>= 8; mData[8] = (unsigned char) tmp; - LLMD5 md5_uuid; - - md5_uuid.update(mData,16); - md5_uuid.finalize(); - md5_uuid.raw_digest(mData); + HBXXH128::digest(*this, (const void*)mData, 16); } void LLUUID::generate(const std::string& hash_string) { - LLMD5 md5_uuid((U8*)hash_string.c_str()); - md5_uuid.raw_digest(mData); + HBXXH128::digest(*this, hash_string); } U32 LLUUID::getRandomSeed() @@ -885,13 +884,8 @@ U32 LLUUID::getRandomSeed() seed[7]=(unsigned char)(pid); getSystemTime((uuid_time_t *)(&seed[8])); - LLMD5 md5_seed; - - md5_seed.update(seed,16); - md5_seed.finalize(); - md5_seed.raw_digest(seed); - - return(*(U32 *)seed); + U64 seed64 = HBXXH64((const void*)seed, 16).digest(); + return U32(seed64) ^ U32(seed64 >> 32); } BOOL LLUUID::parseUUID(const std::string& buf, LLUUID* value) |