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-rw-r--r--src/Protocol/Protocol132.cpp149
1 files changed, 33 insertions, 116 deletions
diff --git a/src/Protocol/Protocol132.cpp b/src/Protocol/Protocol132.cpp
index b4ca37d37..f5fd95c7e 100644
--- a/src/Protocol/Protocol132.cpp
+++ b/src/Protocol/Protocol132.cpp
@@ -28,13 +28,14 @@
#pragma warning(disable:4702)
#endif
-#include "cryptopp/randpool.h"
-
#ifdef _MSC_VER
#pragma warning(pop)
#endif
+
+
+
#define HANDLE_PACKET_READ(Proc, Type, Var) \
Type Var; \
{ \
@@ -49,17 +50,6 @@
-typedef unsigned char Byte;
-
-
-
-
-
-using namespace CryptoPP;
-
-
-
-
const int MAX_ENC_LEN = 512; // Maximum size of the encrypted message; should be 128, but who knows...
@@ -93,81 +83,6 @@ 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:
@@ -197,11 +112,11 @@ void cProtocol132::DataReceived(const char * a_Data, int a_Size)
{
if (m_IsEncrypted)
{
- byte Decrypted[512];
+ Byte Decrypted[512];
while (a_Size > 0)
{
int NumBytes = (a_Size > (int)sizeof(Decrypted)) ? (int)sizeof(Decrypted) : a_Size;
- m_Decryptor.ProcessData(Decrypted, (byte *)a_Data, NumBytes);
+ m_Decryptor.ProcessData(Decrypted, (Byte *)a_Data, NumBytes);
super::DataReceived((const char *)Decrypted, NumBytes);
a_Size -= NumBytes;
a_Data += NumBytes;
@@ -582,9 +497,7 @@ int cProtocol132::ParseHandshake(void)
return PARSE_OK; // Player is not allowed into the server
}
- // Send a 0xFD Encryption Key Request http://wiki.vg/Protocol#0xFD
- CryptoPP::StringSink sink(m_ServerPublicKey); // GCC won't allow inline instantiation in the following line, damned temporary refs
- cRoot::Get()->GetServer()->GetPublicKey().Save(sink);
+ // Send a 0xfd Encryption Key Request http://wiki.vg/Protocol#0xFD
SendEncryptionKeyRequest();
return PARSE_OK;
@@ -596,7 +509,7 @@ int cProtocol132::ParseHandshake(void)
int cProtocol132::ParseClientStatuses(void)
{
- HANDLE_PACKET_READ(ReadByte, byte, Status);
+ HANDLE_PACKET_READ(ReadByte, Byte, Status);
if ((Status & 1) == 0)
{
m_Client->HandleLogin(39, m_Username);
@@ -714,11 +627,11 @@ void cProtocol132::Flush(void)
int a_Size = m_DataToSend.size();
if (m_IsEncrypted)
{
- byte Encrypted[8192]; // Larger buffer, we may be sending lots of data (chunks)
+ Byte Encrypted[8192]; // Larger buffer, we may be sending lots of data (chunks)
while (a_Size > 0)
{
int NumBytes = (a_Size > (int)sizeof(Encrypted)) ? (int)sizeof(Encrypted) : a_Size;
- m_Encryptor.ProcessData(Encrypted, (byte *)a_Data, NumBytes);
+ m_Encryptor.ProcessData(Encrypted, (Byte *)a_Data, NumBytes);
super::SendData((const char *)Encrypted, NumBytes);
a_Size -= NumBytes;
a_Data += NumBytes;
@@ -880,8 +793,8 @@ void cProtocol132::SendEncryptionKeyRequest(void)
cCSLock Lock(m_CSPacket);
WriteByte(0xfd);
WriteString(cRoot::Get()->GetServer()->GetServerID());
- WriteShort((short)m_ServerPublicKey.size());
- SendData(m_ServerPublicKey.data(), m_ServerPublicKey.size());
+ WriteShort((short)(cRoot::Get()->GetServer()->GetPublicKeyDER().size()));
+ SendData(cRoot::Get()->GetServer()->GetPublicKeyDER().data(), cRoot::Get()->GetServer()->GetPublicKeyDER().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();
@@ -894,13 +807,11 @@ void cProtocol132::SendEncryptionKeyRequest(void)
void cProtocol132::HandleEncryptionKeyResponse(const AString & a_EncKey, const AString & a_EncNonce)
{
// Decrypt EncNonce using privkey
- RSAES<PKCS1v15>::Decryptor rsaDecryptor(cRoot::Get()->GetServer()->GetPrivateKey());
- time_t CurTime = time(NULL);
- CryptoPP::RandomPool rng;
- rng.Put((const byte *)&CurTime, sizeof(CurTime));
+ cRSAPrivateKey & rsaDecryptor = cRoot::Get()->GetServer()->GetPrivateKey();
+
Int32 DecryptedNonce[MAX_ENC_LEN / sizeof(Int32)];
- DecodingResult res = rsaDecryptor.Decrypt(rng, (const byte *)a_EncNonce.data(), a_EncNonce.size(), (byte *)DecryptedNonce);
- if (!res.isValidCoding || (res.messageLength != 4))
+ int res = rsaDecryptor.Decrypt((const Byte *)a_EncNonce.data(), a_EncNonce.size(), (Byte *)DecryptedNonce, sizeof(DecryptedNonce));
+ if (res != 4)
{
LOGD("Bad nonce length");
m_Client->Kick("Hacked client");
@@ -914,9 +825,9 @@ void cProtocol132::HandleEncryptionKeyResponse(const AString & a_EncKey, const A
}
// Decrypt the symmetric encryption key using privkey:
- byte DecryptedKey[MAX_ENC_LEN];
- res = rsaDecryptor.Decrypt(rng, (const byte *)a_EncKey.data(), a_EncKey.size(), DecryptedKey);
- if (!res.isValidCoding || (res.messageLength != 16))
+ Byte DecryptedKey[MAX_ENC_LEN];
+ res = rsaDecryptor.Decrypt((const Byte *)a_EncKey.data(), a_EncKey.size(), DecryptedKey, sizeof(DecryptedKey));
+ if (res != 16)
{
LOGD("Bad key length");
m_Client->Kick("Hacked client");
@@ -932,6 +843,12 @@ void cProtocol132::HandleEncryptionKeyResponse(const AString & a_EncKey, const A
Flush();
}
+ #ifdef _DEBUG
+ AString DecryptedKeyHex;
+ CreateHexDump(DecryptedKeyHex, DecryptedKey, res, 16);
+ LOGD("Received encryption key, %d bytes:\n%s", res, DecryptedKeyHex.c_str());
+ #endif
+
StartEncryption(DecryptedKey);
return;
}
@@ -940,21 +857,21 @@ void cProtocol132::HandleEncryptionKeyResponse(const AString & a_EncKey, const A
-void cProtocol132::StartEncryption(const byte * a_Key)
+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_Encryptor.Init(a_Key, a_Key);
+ m_Decryptor.Init(a_Key, a_Key);
m_IsEncrypted = true;
// Prepare the m_AuthServerID:
- CryptoPP::SHA1 Checksum;
+ cSHA1Checksum Checksum;
AString ServerID = cRoot::Get()->GetServer()->GetServerID();
- Checksum.Update((const byte *)ServerID.c_str(), ServerID.length());
+ 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);
+ Checksum.Update((const Byte *)cRoot::Get()->GetServer()->GetPublicKeyDER().data(), cRoot::Get()->GetServer()->GetPublicKeyDER().size());
+ Byte Digest[20];
+ Checksum.Finalize(Digest);
+ cSHA1Checksum::DigestToJava(Digest, m_AuthServerID);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 00:20:43 +0100