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CWE-ou-minkata
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Merge pull request #69 from diafero/config-simplification 

Config simplification
Darryl Pogue 14 years ago
parent
4020ea22ab 837dae9b69
commit
c0a5199957
6 changed files with 163 additions and 86 deletions
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  1. 6
      Sources/Plasma/NucleusLib/pnNetCli/pnNcChannel.cpp
  2. 146
      Sources/Plasma/NucleusLib/pnNetCli/pnNcCli.cpp
  3. 28
      Sources/Plasma/NucleusLib/pnNetCli/pnNcEncrypt.cpp
  4. 4
      Sources/Plasma/NucleusLib/pnUtils/Private/pnUtBigNum.h
  5. 53
      Sources/Plasma/PubUtilLib/plNetClientComm/plNetClientComm.cpp
  6. 12
      Sources/Plasma/PubUtilLib/plNetGameLib/Private/plNglGateKeeper.cpp

6
Sources/Plasma/NucleusLib/pnNetCli/pnNcChannel.cpp
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@ -341,9 +341,9 @@ void NetMsgChannelGetDhConstants (
const BigNum ** dh_xa,
const BigNum ** dh_n
) {
*dh_g = channel->m_dh_g;
*dh_xa = &channel->m_dh_xa;
*dh_n = &channel->m_dh_n;
if (dh_g) *dh_g = channel->m_dh_g;
if (dh_xa) *dh_xa = &channel->m_dh_xa;
if (dh_n) *dh_n = &channel->m_dh_n;
}

146
Sources/Plasma/NucleusLib/pnNetCli/pnNcCli.cpp
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@ -40,8 +40,6 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
# define NCCLI_LOG NULL_STMT
#endif
//#define NO_ENCRYPTION
#ifndef PLASMA_EXTERNAL_RELEASE
struct NetLogMessage_Header
@ -120,8 +118,8 @@ struct NetCli : THashKeyVal<Uuid> {
ENetCliMode mode;
FNetCliEncrypt encryptFcn;
byte seed[kNetMaxSymmetricSeedBytes];
CryptKey * cryptIn;
CryptKey * cryptOut;
CryptKey * cryptIn; // nil if encrytpion is disabled
CryptKey * cryptOut; // nil if encrytpion is disabled
void * encryptParam;
// Message buffers
@ -174,9 +172,8 @@ static void PutBufferOnWire (NetCli * cli, void * data, unsigned bytes) {
}
#endif // PLASMA_EXTERNAL_RELEASE
if (cli->mode == kNetCliModeEncrypted) {
if (cli->mode == kNetCliModeEncrypted && cli->cryptOut) {
// Encrypt data...
#ifndef NO_ENCRYPTION
if (bytes <= 2048)
// byte count is small, use stack-based buffer
temp = ALLOCA(byte, bytes);
@ -187,7 +184,6 @@ static void PutBufferOnWire (NetCli * cli, void * data, unsigned bytes) {
MemCopy(temp, data, bytes);
CryptEncrypt(cli->cryptOut, bytes, temp);
data = temp;
#endif
}
if (cli->sock)
AsyncSocketSend(cli->sock, data, bytes);
@ -644,7 +640,7 @@ static void ClientConnect (NetCli * cli) {
if (cli->sock) {
unsigned bytes;
NetCli_Cli2Srv_Connect msg;
unsigned char * data = serverSeed.GetData_LE(&bytes);
unsigned char * data = serverSeed.GetData_LE(&bytes); // will be 0 if encryption is disabled, and thereby send an empty seed
ASSERTMSG(bytes <= sizeof(msg.dh_y_data), "4");
msg.message = kNetCliCli2SrvConnect;
msg.length = (byte) (sizeof(msg) - sizeof(msg.dh_y_data) + bytes);
@ -668,48 +664,55 @@ static bool ServerRecvConnect (
* (const NetCli_Cli2Srv_Connect *) &pkt;
if (pkt.length < sizeof(msg))
return false;
int seedLength = msg.length - sizeof(pkt);
// Send the server seed to the client (unencrypted)
if (cli->sock) {
NetCli_Srv2Cli_Encrypt reply;
reply.message = kNetCliSrv2CliEncrypt;
reply.length = sizeof(reply);
reply.length = seedLength == 0 ? 0 : sizeof(reply); // reply with empty seed if we got empty seed (this means: no encryption)
MemCopy(reply.serverSeed, cli->seed, sizeof(reply.serverSeed));
AsyncSocketSend(cli->sock, &reply, sizeof(reply));
AsyncSocketSend(cli->sock, &reply, reply.length);
}
// Compute client seed
byte clientSeed[kNetMaxSymmetricSeedBytes];
{
if (seedLength == 0) { // client wishes no encryption (that's okay, nobody else can "fake" us as nobody has the private key, so if the client actually wants encryption it will only work with the correct peer)
cli->cryptIn = nil;
cli->cryptOut = nil;
}
else {
// Compute client seed
byte clientSeed[kNetMaxSymmetricSeedBytes];
BigNum clientSeedValue;
NetMsgCryptServerConnect(
cli->channel,
msg.length - sizeof(pkt),
msg.dh_y_data,
&clientSeedValue
{
NetMsgCryptServerConnect(
cli->channel,
seedLength,
msg.dh_y_data,
&clientSeedValue
);
ZERO(clientSeed);
unsigned bytes;
unsigned char * data = clientSeedValue.GetData_LE(&bytes);
MemCopy(clientSeed, data, min(bytes, sizeof(clientSeed)));
delete [] data;
}
// Create the symmetric key from a combination
// of the client seed and the server seed
byte sharedSeed[kNetMaxSymmetricSeedBytes];
CreateSymmetricKey(
sizeof(cli->seed), cli->seed, // server seed
sizeof(clientSeed), clientSeed, // client seed
sizeof(sharedSeed), sharedSeed // combined seed
);
ZERO(clientSeed);
unsigned bytes;
unsigned char * data = clientSeedValue.GetData_LE(&bytes);
MemCopy(clientSeed, data, min(bytes, sizeof(clientSeed)));
delete [] data;
// Switch to encrypted mode
cli->cryptIn = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
cli->cryptOut = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
}
// Create the symmetric key from a combination
// of the client seed and the server seed
byte sharedSeed[kNetMaxSymmetricSeedBytes];
CreateSymmetricKey(
sizeof(cli->seed), cli->seed, // server seed
sizeof(clientSeed), clientSeed, // client seed
sizeof(sharedSeed), sharedSeed // combined seed
);
// Switch to encrypted mode
cli->mode = kNetCliModeEncrypted;
cli->cryptIn = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
cli->cryptOut = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
cli->mode = kNetCliModeEncrypted; // should rather be called "established", but whatever
return cli->encryptFcn(kNetSuccess, cli->encryptParam);
}
@ -722,26 +725,39 @@ static bool ClientRecvEncrypt (
if (cli->mode != kNetCliModeClientStart)
return false;
// Validate message size
// find out if we want encryption
const BigNum * DH_N;
NetMsgChannelGetDhConstants(cli->channel, nil, nil, &DH_N);
bool encrypt = !DH_N->isZero();
// Process message
const NetCli_Srv2Cli_Encrypt & msg =
* (const NetCli_Srv2Cli_Encrypt *) &pkt;
if (pkt.length != sizeof(msg))
return false;
if (encrypt) { // we insist on encryption, don't let some MitM decide for us!
if (pkt.length != sizeof(msg))
return false;
// Create the symmetric key from a combination
// of the client seed and the server seed
byte sharedSeed[kNetMaxSymmetricSeedBytes];
CreateSymmetricKey(
sizeof(msg.serverSeed), msg.serverSeed, // server seed
sizeof(cli->seed), cli->seed, // client seed
sizeof(sharedSeed), sharedSeed // combined seed
);
// Create the symmetric key from a combination
// of the client seed and the server seed
byte sharedSeed[kNetMaxSymmetricSeedBytes];
CreateSymmetricKey(
sizeof(msg.serverSeed), msg.serverSeed, // server seed
sizeof(cli->seed), cli->seed, // client seed
sizeof(sharedSeed), sharedSeed // combined seed
);
// Switch to encrypted mode
cli->mode = kNetCliModeEncrypted;
cli->cryptIn = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
cli->cryptOut = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
// Switch to encrypted mode
cli->cryptIn = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
cli->cryptOut = CryptKeyCreate(kCryptRc4, sizeof(sharedSeed), sharedSeed);
}
else { // honestly we do not care what the other side sends, we will send plaintext
if (pkt.length != sizeof(pkt))
return false;
cli->cryptIn = nil;
cli->cryptOut = nil;
}
cli->mode = kNetCliModeEncrypted; // should rather be called "established", but whatever
return cli->encryptFcn(kNetSuccess, cli->encryptParam);
}
@ -1061,18 +1077,18 @@ bool NetCliDispatch (
// Decrypt data...
byte * temp, * heap = NULL;
#ifndef NO_ENCRYPTION
if (bytes <= 2048)
// byte count is small, use stack-based buffer
temp = ALLOCA(byte, bytes);
else
// byte count is large, use heap-based buffer
temp = heap = (byte *)ALLOC(bytes);
MemCopy(temp, data, bytes);
CryptDecrypt(cli->cryptIn, bytes, temp);
data = temp;
#endif
if (cli->cryptIn) {
if (bytes <= 2048)
// byte count is small, use stack-based buffer
temp = ALLOCA(byte, bytes);
else
// byte count is large, use heap-based buffer
temp = heap = (byte *)ALLOC(bytes);
MemCopy(temp, data, bytes);
CryptDecrypt(cli->cryptIn, bytes, temp);
data = temp;
}
// Add data to accumulator and dispatch
cli->input.Add(bytes, data);

28
Sources/Plasma/NucleusLib/pnNetCli/pnNcEncrypt.cpp
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@ -83,6 +83,7 @@ static void GetCachedServerKey (
const BigNum * DH_A;
const BigNum * DH_N;
NetMsgChannelGetDhConstants(channel, &DH_G, &DH_A, &DH_N);
hsAssert(!DH_N->isZero(), "DH_N must not be zero in encrypted mode");
// Compute the result
ka->PowMod(dh_y, *DH_A, *DH_N);
@ -107,17 +108,22 @@ void NetMsgCryptClientStart (
const BigNum * DH_X;
const BigNum * DH_N;
NetMsgChannelGetDhConstants(channel, &DH_G, &DH_X, &DH_N);
// Client chooses b and y on connect
BigNum g(DH_G);
BigNum seed(seedBytes, seedData);
BigNum b; b.Rand(kNetDiffieHellmanKeyBits, &seed);
// Client computes key: kb = x^b mod n
clientSeed->PowMod(*DH_X, b, *DH_N);
// Client sends y to server
serverSeed->PowMod(g, b, *DH_N);
if (DH_N->isZero()) { // no actual encryption, but the caller expects a seed
clientSeed->SetZero();
serverSeed->SetZero();
}
else {
// Client chooses b and y on connect
BigNum g(DH_G);
BigNum seed(seedBytes, seedData);
BigNum b; b.Rand(kNetDiffieHellmanKeyBits, &seed);
// Client computes key: kb = x^b mod n
clientSeed->PowMod(*DH_X, b, *DH_N);
// Client sends y to server
serverSeed->PowMod(g, b, *DH_N);
}
}
//============================================================================

4
Sources/Plasma/NucleusLib/pnUtils/Private/pnUtBigNum.h
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@ -89,6 +89,10 @@ public:
{
return BN_cmp(&m_number, &a.m_number);
}
bool isZero() const
{
return BN_is_zero(&m_number);
}
void Div (const BigNum & a, dword b, dword * remainder)
{

53
Sources/Plasma/PubUtilLib/plNetClientComm/plNetClientComm.cpp
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@ -91,8 +91,10 @@ static NetCommAge s_age;
static NetCommAge s_startupAge;
static bool s_needAvatarLoad = true;
static bool s_loginComplete = false;
static bool s_hasAuthSrvIpAddress = false;
static bool s_hasFileSrvIpAddress = false;
static ENetError s_authResult = kNetErrAuthenticationFailed;
static wchar s_authSrvAddr[256];
static wchar s_fileSrvAddr[256];
static wchar s_iniServerAddr[256];
@ -829,6 +831,16 @@ static void IReadNetIni() {
IniClose(ini);
}
//============================================================================
static void AuthSrvIpAddressCallback (
ENetError result,
void * param,
const wchar addr[]
) {
StrCopy(s_authSrvAddr, addr, arrsize(s_authSrvAddr));
s_hasAuthSrvIpAddress = true;
}
//============================================================================
static void FileSrvIpAddressCallback (
ENetError result,
@ -979,21 +991,47 @@ void NetCommConnect () {
const wchar ** addrs;
unsigned count;
count = GetAuthSrvHostnames(&addrs);
NetCliAuthStartConnect(addrs, count);
hsBool connectedToKeeper = false;
// if a console override was specified for a authserv, connect directly to the authserver rather than going through the gatekeeper
if((count = GetAuthSrvHostnames(&addrs)) && wcslen(addrs[0]))
{
NetCliAuthStartConnect(addrs, count);
}
else
{
count = GetGateKeeperSrvHostnames(&addrs);
NetCliGateKeeperStartConnect(addrs, count);
connectedToKeeper = true;
// request an auth server ip address
NetCliGateKeeperAuthSrvIpAddressRequest(AuthSrvIpAddressCallback, nil);
while(!s_hasAuthSrvIpAddress && !s_netError) {
NetClientUpdate();
AsyncSleep(10);
}
const wchar * authSrv[] = {
s_authSrvAddr
};
NetCliAuthStartConnect(authSrv, 1);
}
if (!gDataServerLocal) {
// if a console override was specified for a filesrv, connect directly to the fileserver rather than going through the gatekeeper
if(GetFileSrvHostnames(&addrs) && wcslen(addrs[0]))
if((count = GetFileSrvHostnames(&addrs)) && wcslen(addrs[0]))
{
NetCliFileStartConnect(addrs, count);
}
else
{
count = GetGateKeeperSrvHostnames(&addrs);
NetCliGateKeeperStartConnect(addrs, count);
if (!connectedToKeeper) {
count = GetGateKeeperSrvHostnames(&addrs);
NetCliGateKeeperStartConnect(addrs, count);
connectedToKeeper = true;
}
// request a file server ip address
NetCliGateKeeperFileSrvIpAddressRequest(FileSrvIpAddressCallback, nil, false);
@ -1009,6 +1047,9 @@ void NetCommConnect () {
NetCliFileStartConnect(fileSrv, 1);
}
}
if (connectedToKeeper)
NetCliGateKeeperDisconnect();
}
//============================================================================

12
Sources/Plasma/PubUtilLib/plNetGameLib/Private/plNglGateKeeper.cpp
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@ -735,6 +735,7 @@ static NetMsgInitSend s_send[] = {
static NetMsgInitRecv s_recv[] = {
{ MSG(PingReply) },
{ MSG(FileSrvIpAddressReply) },
{ MSG(AuthSrvIpAddressReply) },
};
#undef MSG
@ -1115,4 +1116,13 @@ void NetCliGateKeeperFileSrvIpAddressRequest (
) {
FileSrvIpAddressRequestTrans * trans = NEW(FileSrvIpAddressRequestTrans)(callback, param, isPatcher);
NetTransSend(trans);
}
}
//============================================================================
void NetCliGateKeeperAuthSrvIpAddressRequest (
FNetCliGateKeeperAuthSrvIpAddressRequestCallback callback,
void * param
) {
AuthSrvIpAddressRequestTrans * trans = NEW(AuthSrvIpAddressRequestTrans)(callback, param);
NetTransSend(trans);
}

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