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| author | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2012-09-06 19:36:59 +0200 |
|---|---|---|
| committer | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2012-09-06 19:36:59 +0200 |
| commit | 0ba2be666f68dda7a76d28e7cd8c74812c501d9f (patch) | |
| tree | bf0795f7b89dd956bf4a4cfa002f7ef009915c38 /source/Protocol132.cpp | |
| parent | Removed excessive debug logging in cProtocol132 (diff) | |
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Diffstat (limited to 'source/Protocol132.cpp')
| -rw-r--r-- | source/Protocol132.cpp | 112 |
1 files changed, 103 insertions, 9 deletions
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);
}
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