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-rw-r--r--source/Protocol.h3
-rw-r--r--source/Protocol125.cpp11
-rw-r--r--source/Protocol125.h2
-rw-r--r--source/Protocol132.cpp112
-rw-r--r--source/Protocol132.h12
-rw-r--r--source/ProtocolRecognizer.cpp10
-rw-r--r--source/ProtocolRecognizer.h2
-rw-r--r--source/cAuthenticator.cpp6
-rw-r--r--source/cAuthenticator.h13
-rw-r--r--source/cClientHandle.cpp2
10 files changed, 154 insertions, 19 deletions
diff --git a/source/Protocol.h b/source/Protocol.h
index e01afa9cc..44ef2cafc 100644
--- a/source/Protocol.h
+++ b/source/Protocol.h
@@ -81,6 +81,9 @@ public:
virtual void SendWholeInventory (const cWindow & a_Window) = 0;
virtual void SendWindowClose (char a_WindowID) = 0;
virtual void SendWindowOpen (char a_WindowID, char a_WindowType, const AString & a_WindowTitle, char a_NumSlots) = 0;
+
+ /// Returns the ServerID used for authentication through session.minecraft.net
+ virtual AString GetAuthServerID(void) = 0;
protected:
cClientHandle * m_Client;
diff --git a/source/Protocol125.cpp b/source/Protocol125.cpp
index 7047f1f30..1927013da 100644
--- a/source/Protocol125.cpp
+++ b/source/Protocol125.cpp
@@ -756,6 +756,17 @@ void cProtocol125::SendWindowOpen(char a_WindowID, char a_WindowType, const AStr
+AString cProtocol125::GetAuthServerID(void)
+{
+ // http://wiki.vg/wiki/index.php?title=Session&oldid=2262
+ // The server generates a random hash and that is used for all clients, unmodified
+ return cRoot::Get()->GetServer()->GetServerID();
+}
+
+
+
+
+
void cProtocol125::SendData(const char * a_Data, int a_Size)
{
m_Client->SendData(a_Data, a_Size);
diff --git a/source/Protocol125.h b/source/Protocol125.h
index e787f462f..2e94cdfbe 100644
--- a/source/Protocol125.h
+++ b/source/Protocol125.h
@@ -67,6 +67,8 @@ public:
virtual void SendWindowClose (char a_WindowID) override;
virtual void SendWindowOpen (char a_WindowID, char a_WindowType, const AString & a_WindowTitle, char a_NumSlots) override;
+ virtual AString GetAuthServerID(void) override;
+
protected:
/// Results of packet-parsing:
enum {
diff --git a/source/Protocol132.cpp b/source/Protocol132.cpp
index f22bbda94..e291c0c69 100644
--- a/source/Protocol132.cpp
+++ b/source/Protocol132.cpp
@@ -65,6 +65,81 @@ enum
+// Converts a raw 160-bit SHA1 digest into a Java Hex representation
+// According to http://wiki.vg/wiki/index.php?title=Protocol_Encryption&oldid=2802
+static void DigestToJava(byte a_Digest[20], AString & a_Out)
+{
+ bool IsNegative = (a_Digest[0] >= 0x80);
+ if (IsNegative)
+ {
+ // Two's complement:
+ bool carry = true; // Add one to the whole number
+ for (int i = 19; i >= 0; i--)
+ {
+ a_Digest[i] = ~a_Digest[i];
+ if (carry)
+ {
+ carry = (a_Digest[i] == 0xff);
+ a_Digest[i]++;
+ }
+ }
+ }
+ a_Out.clear();
+ a_Out.reserve(40);
+ for (int i = 0; i < 20; i++)
+ {
+ AppendPrintf(a_Out, "%02x", a_Digest[i]);
+ }
+ while ((a_Out.length() > 0) && (a_Out[0] == '0'))
+ {
+ a_Out.erase(0, 1);
+ }
+ if (IsNegative)
+ {
+ a_Out.insert(0, "-");
+ }
+}
+
+
+
+
+
+/*
+// Self-test the hash formatting for known values:
+// sha1(Notch) : 4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48
+// sha1(jeb_) : -7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1
+// sha1(simon) : 88e16a1019277b15d58faf0541e11910eb756f6
+
+class Test
+{
+public:
+ Test(void)
+ {
+ AString DigestNotch, DigestJeb, DigestSimon;
+ byte Digest[20];
+ CryptoPP::SHA1 Checksum;
+ Checksum.Update((const byte *)"Notch", 5);
+ Checksum.Final(Digest);
+ DigestToJava(Digest, DigestNotch);
+ Checksum.Restart();
+ Checksum.Update((const byte *)"jeb_", 4);
+ Checksum.Final(Digest);
+ DigestToJava(Digest, DigestJeb);
+ Checksum.Restart();
+ Checksum.Update((const byte *)"simon", 5);
+ Checksum.Final(Digest);
+ DigestToJava(Digest, DigestSimon);
+ printf("Notch: \"%s\"", DigestNotch.c_str());
+ printf("jeb_: \"%s\"", DigestJeb.c_str());
+ printf("simon: \"%s\"", DigestSimon.c_str());
+ }
+} test;
+*/
+
+
+
+
+
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cProtocol132:
@@ -267,6 +342,19 @@ void cProtocol132::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
+AString cProtocol132::GetAuthServerID(void)
+{
+ // http://wiki.vg/wiki/index.php?title=Session&oldid=2615
+ // Server uses SHA1 to mix ServerID, Client secret and server public key together
+ // The mixing is done in StartEncryption, the result is in m_AuthServerID
+
+ return m_AuthServerID;
+}
+
+
+
+
+
int cProtocol132::ParsePacket(unsigned char a_PacketType)
{
switch (a_PacketType)
@@ -322,10 +410,9 @@ int cProtocol132::ParseHandshake(void)
}
// Send a 0xFD Encryption Key Request http://wiki.vg/Protocol#0xFD
- AString key;
- CryptoPP::StringSink sink(key); // GCC won't allow inline instantiation in the following line, damned temporary refs
+ CryptoPP::StringSink sink(m_ServerPublicKey); // GCC won't allow inline instantiation in the following line, damned temporary refs
cRoot::Get()->GetServer()->GetPublicKey().Save(sink);
- SendEncryptionKeyRequest(key);
+ SendEncryptionKeyRequest();
return PARSE_OK;
}
@@ -537,16 +624,13 @@ void cProtocol132::SendCompass(const cWorld & a_World)
-void cProtocol132::SendEncryptionKeyRequest(const AString & a_Key)
+void cProtocol132::SendEncryptionKeyRequest(void)
{
- // DEBUG:
- LOGD("ServerID: \"%s\"", cRoot::Get()->GetServer()->GetServerID().c_str());
-
cCSLock Lock(m_CSPacket);
WriteByte((char)0xfd);
WriteString(cRoot::Get()->GetServer()->GetServerID());
- WriteShort((short)a_Key.size());
- SendData(a_Key.data(), a_Key.size());
+ WriteShort((short)m_ServerPublicKey.size());
+ SendData(m_ServerPublicKey.data(), m_ServerPublicKey.size());
WriteShort(4);
WriteInt((int)(intptr_t)this); // Using 'this' as the cryptographic nonce, so that we don't have to generate one each time :)
Flush();
@@ -610,6 +694,16 @@ void cProtocol132::StartEncryption(const byte * a_Key)
m_Encryptor.SetKey(a_Key, 16, MakeParameters(Name::IV(), ConstByteArrayParameter(a_Key, 16))(Name::FeedbackSize(), 1));
m_Decryptor.SetKey(a_Key, 16, MakeParameters(Name::IV(), ConstByteArrayParameter(a_Key, 16))(Name::FeedbackSize(), 1));
m_IsEncrypted = true;
+
+ // Prepare the m_AuthServerID:
+ CryptoPP::SHA1 Checksum;
+ AString ServerID = cRoot::Get()->GetServer()->GetServerID();
+ Checksum.Update((const byte *)ServerID.c_str(), ServerID.length());
+ Checksum.Update(a_Key, 16);
+ Checksum.Update((const byte *)m_ServerPublicKey.c_str(), m_ServerPublicKey.length());
+ byte Digest[20];
+ Checksum.Final(Digest);
+ DigestToJava(Digest, m_AuthServerID);
}
diff --git a/source/Protocol132.h b/source/Protocol132.h
index 3117af777..cca91c44b 100644
--- a/source/Protocol132.h
+++ b/source/Protocol132.h
@@ -40,6 +40,8 @@ public:
virtual void SendPlayerSpawn (const cPlayer & a_Player) override;
virtual void SendSpawnMob (const cMonster & a_Mob) override;
virtual void SendUnloadChunk (int a_ChunkX, int a_ChunkZ) override;
+
+ virtual AString GetAuthServerID(void) override;
// DEBUG:
virtual void SendKeepAlive (int a_PingID) override;
@@ -64,6 +66,12 @@ protected:
CryptoPP::CFB_Mode<CryptoPP::AES>::Encryption m_Encryptor;
AString m_DataToSend;
+ /// The ServerID used for session authentication; set in StartEncryption(), used in GetAuthServerID()
+ AString m_AuthServerID;
+
+ /// The server's public key, as used by SendEncryptionKeyRequest() and StartEncryption()
+ AString m_ServerPublicKey;
+
virtual void SendData(const char * a_Data, int a_Size) override;
// DEBUG:
@@ -74,12 +82,12 @@ protected:
virtual int ParseItem(cItem & a_Item) override;
virtual void SendCompass(const cWorld & a_World);
- virtual void SendEncryptionKeyRequest(const AString & a_Key);
+ virtual void SendEncryptionKeyRequest(void);
/// Decrypts the key and nonce, checks nonce, starts the symmetric encryption
void HandleEncryptionKeyResponse(const AString & a_EncKey, const AString & a_EncNonce);
- /// Starts the symmetric encryption with the specified key
+ /// Starts the symmetric encryption with the specified key; also sets m_AuthServerID
void StartEncryption(const byte * a_Key);
} ;
diff --git a/source/ProtocolRecognizer.cpp b/source/ProtocolRecognizer.cpp
index 69b733c47..669598923 100644
--- a/source/ProtocolRecognizer.cpp
+++ b/source/ProtocolRecognizer.cpp
@@ -458,6 +458,16 @@ void cProtocolRecognizer::SendWindowOpen(char a_WindowID, char a_WindowType, con
+AString cProtocolRecognizer::GetAuthServerID(void)
+{
+ ASSERT(m_Protocol != NULL);
+ return m_Protocol->GetAuthServerID();
+}
+
+
+
+
+
void cProtocolRecognizer::SendData(const char * a_Data, int a_Size)
{
// This is used only when handling the server ping
diff --git a/source/ProtocolRecognizer.h b/source/ProtocolRecognizer.h
index f773c7ac1..eef89ec2e 100644
--- a/source/ProtocolRecognizer.h
+++ b/source/ProtocolRecognizer.h
@@ -76,6 +76,8 @@ public:
virtual void SendWholeInventory (const cWindow & a_Window) override;
virtual void SendWindowClose (char a_WindowID) override;
virtual void SendWindowOpen (char a_WindowID, char a_WindowType, const AString & a_WindowTitle, char a_NumSlots) override;
+
+ virtual AString GetAuthServerID(void) override;
virtual void SendData(const char * a_Data, int a_Size) override;
diff --git a/source/cAuthenticator.cpp b/source/cAuthenticator.cpp
index d34758c34..9d06e7f40 100644
--- a/source/cAuthenticator.cpp
+++ b/source/cAuthenticator.cpp
@@ -127,11 +127,11 @@ void cAuthenticator::Execute(void)
}
ASSERT(!m_Queue.empty());
- int ClientID = m_Queue.front().mClientID;
- AString UserName = m_Queue.front().mName;
+ int ClientID = m_Queue.front().m_ClientID;
+ AString UserName = m_Queue.front().m_Name;
AString ActualAddress = m_Address;
ReplaceString(ActualAddress, "%USERNAME%", UserName);
- ReplaceString(ActualAddress, "%SERVERID%", cRoot::Get()->GetServer()->GetServerID());
+ ReplaceString(ActualAddress, "%SERVERID%", m_Queue.front().m_ServerID);
m_Queue.pop_front();
Lock.Unlock();
diff --git a/source/cAuthenticator.h b/source/cAuthenticator.h
index 0d69e930e..4d0bd1bbb 100644
--- a/source/cAuthenticator.h
+++ b/source/cAuthenticator.h
@@ -50,11 +50,16 @@ private:
class cUser
{
public:
- int mClientID;
- AString mName;
- AString mServerHash;
+ int m_ClientID;
+ AString m_Name;
+ AString m_ServerID;
- cUser(int a_ClientID, const AString & a_Name, const AString & a_ServerHash) : mClientID(a_ClientID), mName(a_Name), mServerHash(a_ServerHash) {}
+ cUser(int a_ClientID, const AString & a_Name, const AString & a_ServerID) :
+ m_ClientID(a_ClientID),
+ m_Name(a_Name),
+ m_ServerID(a_ServerID)
+ {
+ }
} ;
typedef std::deque<cUser> cUserList;
diff --git a/source/cClientHandle.cpp b/source/cClientHandle.cpp
index 98ca7e92e..1d539ff79 100644
--- a/source/cClientHandle.cpp
+++ b/source/cClientHandle.cpp
@@ -440,7 +440,7 @@ bool cClientHandle::HandleLogin(int a_ProtocolVersion, const AString & a_Usernam
// Schedule for authentication; until then, let them wait (but do not block)
m_State = csAuthenticating;
- cRoot::Get()->GetAuthenticator().Authenticate(GetUniqueID(), GetUsername(), cRoot::Get()->GetServer()->GetServerID());
+ cRoot::Get()->GetAuthenticator().Authenticate(GetUniqueID(), GetUsername(), m_Protocol->GetAuthServerID());
return true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 15:25:12 +0100