From 17a94b16ea6207fd5f38fbd309b4db0d92de0d31 Mon Sep 17 00:00:00 2001 From: madmaxoft Date: Wed, 30 Jul 2014 13:52:51 +0200 Subject: MojangAPI: Implemented UUID shortening and dashing. --- src/ClientHandle.cpp | 3 ++- src/ClientHandle.h | 8 +++++++- src/Protocol/Authenticator.cpp | 11 +---------- src/Protocol/MojangAPI.cpp | 34 +++++++++++++++++++++++++++------- src/Protocol/Protocol17x.cpp | 6 +++--- 5 files changed, 40 insertions(+), 22 deletions(-) diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp index e4ad218a2..3f81f0a29 100644 --- a/src/ClientHandle.cpp +++ b/src/ClientHandle.cpp @@ -233,13 +233,14 @@ AString cClientHandle::GenerateOfflineUUID(const AString & a_Username) // This guarantees that they will never collide with an online UUID and can be distinguished. // Proper format for a version 3 UUID is: // xxxxxxxx-xxxx-3xxx-yxxx-xxxxxxxxxxxx where x is any hexadecimal digit and y is one of 8, 9, A, or B + // Note that we generate a short UUID (without the dashes) // Generate an md5 checksum, and use it as base for the ID: unsigned char MD5[16]; md5((const unsigned char *)a_Username.c_str(), a_Username.length(), MD5); MD5[6] &= 0x0f; // Need to trim to 4 bits only... MD5[8] &= 0x0f; // ... otherwise %01x overflows into two chars - return Printf("%02x%02x%02x%02x-%02x%02x-3%01x%02x-8%01x%02x-%02x%02x%02x%02x%02x%02x", + return Printf("%02x%02x%02x%02x%02x%02x3%01x%02x8%01x%02x%02x%02x%02x%02x%02x%02x", MD5[0], MD5[1], MD5[2], MD5[3], MD5[4], MD5[5], MD5[6], MD5[7], MD5[8], MD5[9], MD5[10], MD5[11], diff --git a/src/ClientHandle.h b/src/ClientHandle.h index 50ed596d5..f2183a5ca 100644 --- a/src/ClientHandle.h +++ b/src/ClientHandle.h @@ -66,7 +66,9 @@ public: cPlayer * GetPlayer(void) { return m_Player; } // tolua_export + /** Returns the player's UUID, as used by the protocol, in the short form (no dashes) */ const AString & GetUUID(void) const { return m_UUID; } // tolua_export + void SetUUID(const AString & a_UUID) { m_UUID = a_UUID; } const Json::Value & GetProperties(void) const { return m_Properties; } @@ -80,7 +82,7 @@ public: /** Generates an UUID based on the player name provided. This is used for the offline (non-auth) mode, when there's no UUID source. Each username generates a unique and constant UUID, so that when the player reconnects with the same name, their UUID is the same. - Returns a 36-char UUID (with dashes). */ + Returns a 32-char UUID (no dashes). */ static AString GenerateOfflineUUID(const AString & a_Username); // tolua_export /** Returns true if the UUID is generated by online auth, false if it is an offline-generated UUID. @@ -360,7 +362,11 @@ private: int m_NumBlockChangeInteractionsThisTick; static int s_ClientCount; + + /** ID used for identification during authenticating. Assigned sequentially for each new instance. */ int m_UniqueID; + + /** Contains the UUID used by Mojang to identify the player's account. Short UUID stored here (without dashes) */ AString m_UUID; /** Set to true when the chunk where the player is is sent to the client. Used for spawning the player */ diff --git a/src/Protocol/Authenticator.cpp b/src/Protocol/Authenticator.cpp index e5d16cf10..160564d51 100644 --- a/src/Protocol/Authenticator.cpp +++ b/src/Protocol/Authenticator.cpp @@ -188,21 +188,12 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S return false; } a_UserName = root.get("name", "Unknown").asString(); - a_UUID = root.get("id", "").asString(); + a_UUID = cMojangAPI::MakeUUIDShort(root.get("id", "").asString()); a_Properties = root["properties"]; // Store the player's UUID in the NameToUUID map in MojangAPI: cRoot::Get()->GetMojangAPI().AddPlayerNameToUUIDMapping(a_UserName, a_UUID); - // If the UUID doesn't contain the dashes, insert them at the proper places: - if (a_UUID.size() == 32) - { - a_UUID.insert(8, "-"); - a_UUID.insert(13, "-"); - a_UUID.insert(18, "-"); - a_UUID.insert(23, "-"); - } - return true; } diff --git a/src/Protocol/MojangAPI.cpp b/src/Protocol/MojangAPI.cpp index 05f9c09a7..52afd71da 100644 --- a/src/Protocol/MojangAPI.cpp +++ b/src/Protocol/MojangAPI.cpp @@ -18,6 +18,9 @@ /** The maximum age for items to be kept in the cache. Any item older than this will be removed. */ const Int64 MAX_AGE = 7 * 24 * 60 * 60; // 7 days ago +/** The maximum number of names to send in a single query */ +const int MAX_PER_QUERY = 100; + @@ -29,6 +32,7 @@ const Int64 MAX_AGE = 7 * 24 * 60 * 60; // 7 days ago + /** This is the data of the root certs for Starfield Technologies, the CA that signed sessionserver.mojang.com's cert: Downloaded from http://certs.starfieldtech.com/repository/ */ static const AString & StarfieldCACert(void) @@ -161,9 +165,10 @@ AStringVector cMojangAPI::GetUUIDsFromPlayerNames(const AStringVector & a_Player void cMojangAPI::AddPlayerNameToUUIDMapping(const AString & a_PlayerName, const AString & a_UUID) { AString lcName(a_PlayerName); + AString UUID = MakeUUIDShort(a_UUID); Int64 Now = time(NULL); cCSLock Lock(m_CSNameToUUID); - m_NameToUUID[StrToLower(lcName)] = sUUIDRecord(a_PlayerName, a_UUID, Now); + m_NameToUUID[StrToLower(lcName)] = sUUIDRecord(a_PlayerName, UUID, Now); } @@ -234,8 +239,14 @@ AString cMojangAPI::MakeUUIDShort(const AString & a_UUID) case 36: { + // Remove the dashes from the string: AString res; - // TODO + res.reserve(32); + res.append(a_UUID, 0, 8); + res.append(a_UUID, 9, 4); + res.append(a_UUID, 14, 4); + res.append(a_UUID, 19, 4); + res.append(a_UUID, 24, 12); return res; } } @@ -256,7 +267,16 @@ AString cMojangAPI::MakeUUIDDashed(const AString & a_UUID) case 32: { AString res; - // TODO + res.reserve(36); + res.append(a_UUID, 0, 8); + res.push_back('-'); + res.append(a_UUID, 8, 4); + res.push_back('-'); + res.append(a_UUID, 12, 4); + res.push_back('-'); + res.append(a_UUID, 16, 4); + res.push_back('-'); + res.append(a_UUID, 20, 12); return res; } } @@ -362,11 +382,11 @@ void cMojangAPI::CacheNamesToUUIDs(const AStringVector & a_PlayerNames) while (!NamesToQuery.empty()) { - // Create the request body - a JSON containing up to 100 playernames: + // Create the request body - a JSON containing up to MAX_PER_QUERY playernames: Json::Value root; int Count = 0; AStringVector::iterator itr = NamesToQuery.begin(), end = NamesToQuery.end(); - for (; (itr != end) && (Count < 100); ++itr, ++Count) + for (; (itr != end) && (Count < MAX_PER_QUERY); ++itr, ++Count) { Json::Value req(*itr); root.append(req); @@ -377,7 +397,7 @@ void cMojangAPI::CacheNamesToUUIDs(const AStringVector & a_PlayerNames) // Create the HTTP request: AString Request; - Request += "POST " + m_NameToUUIDAddress + " HTTP/1.0\r\n"; + Request += "POST " + m_NameToUUIDAddress + " HTTP/1.0\r\n"; // We need to use HTTP 1.0 because we don't handle Chunked transfer encoding Request += "Host: " + m_NameToUUIDServer + "\r\n"; Request += "User-Agent: MCServer\r\n"; Request += "Connection: close\r\n"; @@ -430,7 +450,7 @@ void cMojangAPI::CacheNamesToUUIDs(const AStringVector & a_PlayerNames) { Json::Value & Val = root[idx]; AString JsonName = Val.get("name", "").asString(); - AString JsonUUID = Val.get("id", "").asString(); + AString JsonUUID = MakeUUIDShort(Val.get("id", "").asString()); if (JsonUUID.empty()) { continue; diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp index dadf82716..73aba167d 100644 --- a/src/Protocol/Protocol17x.cpp +++ b/src/Protocol/Protocol17x.cpp @@ -680,7 +680,7 @@ void cProtocol172::SendLoginSuccess(void) { cPacketizer Pkt(*this, 0x02); // Login success packet - Pkt.WriteString(m_Client->GetUUID()); + Pkt.WriteString(cMojangAPI::MakeUUIDDashed(m_Client->GetUUID())); Pkt.WriteString(m_Client->GetUsername()); } @@ -941,7 +941,7 @@ void cProtocol172::SendPlayerSpawn(const cPlayer & a_Player) // Called to spawn another player for the client cPacketizer Pkt(*this, 0x0c); // Spawn Player packet Pkt.WriteVarInt(a_Player.GetUniqueID()); - Pkt.WriteString(a_Player.GetClientHandle()->GetUUID()); + Pkt.WriteString(cMojangAPI::MakeUUIDDashed(a_Player.GetClientHandle()->GetUUID())); Pkt.WriteString(a_Player.GetName()); Pkt.WriteFPInt(a_Player.GetPosX()); Pkt.WriteFPInt(a_Player.GetPosY()); @@ -3014,7 +3014,7 @@ void cProtocol176::SendPlayerSpawn(const cPlayer & a_Player) // Called to spawn another player for the client cPacketizer Pkt(*this, 0x0c); // Spawn Player packet Pkt.WriteVarInt(a_Player.GetUniqueID()); - Pkt.WriteString(a_Player.GetClientHandle()->GetUUID()); + Pkt.WriteString(cMojangAPI::MakeUUIDDashed(a_Player.GetClientHandle()->GetUUID())); Pkt.WriteString(a_Player.GetName()); const Json::Value & Properties = m_Client->GetProperties(); -- cgit v1.2.3