public static void HandleRealmList(IClient client, IncomingAuthPacket packet)
{
Contract.Requires(client != null);
Contract.Requires(packet != null);
packet.ReadInt32(); // unk, ignored
var realmNames = RealmList.RealmNames;
var realmsSize = 0;
foreach (string realmName in realmNames)
{
Realm realm = RealmList.GetRealm(realmName);
realmsSize += 3;
// +1 for the null character at the end
realmsSize += realm.Name.Length + 1;
realmsSize += realm.Address.Length + 1;
realmsSize += 6;
if ((realm.Color & 4) != 0)
realmsSize += 5;
}
using (var outPacket = new OutgoingAuthPacket(GruntOpCode.RealmList, 10 + realmsSize))
{
outPacket.Write((short)(6 + realmsSize + 2));
outPacket.Write(0);
outPacket.Write((short)realmNames.Count());
foreach (string realmName in realmNames)
{
Realm realm = RealmList.GetRealm(realmName);
var numChars = 0; //Realm.GetNumChars(/*client.UserData.SRP.Username*/);
outPacket.Write(realm.Icon);
outPacket.Write(realm.Lock);
outPacket.Write(realm.Color);
outPacket.WriteCString(realm.Name);
outPacket.WriteCString(realm.Address);
outPacket.Write(realm.PopulationLevel);
outPacket.Write(numChars);
outPacket.Write(realm.TimeZone);
outPacket.Write((byte)0x2C);
if ((realm.Color & 0x04) != 0)
{
outPacket.Write((byte)0);
outPacket.Write((byte)0);
outPacket.Write((byte)0);
outPacket.Write((short)0);
}
}
outPacket.Write((byte)0x10);
outPacket.Write((byte)0x00);
client.Send(outPacket);
}
}
public static void HandleAuthLogOnChallenge(IClient client, IncomingAuthPacket packet)
{
Contract.Requires(client != null);
Contract.Requires(packet != null);
packet.ReadByte(); // unk
packet.ReadInt16(); // size
packet.ReadFourCC(); // gameName
packet.ReadByte(); // version1
packet.ReadByte(); // version2
packet.ReadByte(); // version3
packet.ReadInt16(); // build
packet.ReadFourCC(); // platform
packet.ReadFourCC(); // os
packet.ReadFourCC(); // country
packet.ReadInt32(); // timeZoneBias
packet.ReadInt32(); // ip
var usernameLength = packet.ReadByte();
var usernameBytes = packet.ReadBytes(usernameLength);
var username = Encoding.ASCII.GetString(usernameBytes);
SRPServer srpData = GetSRPDataForUserName(username);
if (srpData == null)
{
SendAuthenticationChallengeFailure(client, AuthResult.FailUnknownAccount);
}
else
{
client.UserData.SRP = srpData;
// make sure the result is at least 32 bytes long
var peData = srpData.PublicEphemeralValueB.GetBytes(32);
var publicEphemeral = new BigInteger(peData);
var rand = new BigInteger(new FastRandom(), 16 * 8);
SendAuthenticationChallengeSuccess(client,
publicEphemeral,
srpData.Parameters.Generator,
srpData.Parameters.Modulus,
srpData.Salt,
rand);
}
}
public static void HandleAuthLogOnProof(IClient client, IncomingAuthPacket packet)
{
Contract.Requires(client != null);
Contract.Requires(packet != null);
var clientPublicEphemeralA = packet.ReadBigInteger(32);
// Client Proof.
// SHA1 of { SHA1(Modulus) ^ SHA1(Generator), SHA1(USERNAME), salt, PublicA, PublicB, SessionKey }
var clientResult = packet.ReadBigInteger(20);
// SHA1 hash of the PublicA and HMACSHA1 of the contents of WoW.exe and unicows.dll. HMAC seed is the 16 bytes at the end of the challenge sent by the server.
packet.ReadBytes(20); // these can safely be ignored, clientFileHash
// the client tends to send 0, but just in case it's safer to implement this.
var numKeys = packet.ReadByte();
if (numKeys > 0)
{
// only initialize the array if we actually HAVE keys
AuthLogonKey[] keys = new AuthLogonKey[numKeys];
for (byte key = 0; key < numKeys; key++)
{
var unk1 = packet.ReadInt16();
var unk2 = packet.ReadInt32();
var unk3 = packet.ReadBytes(4);
// SHA of { PublicA, PublicB, byte[20] unknown data }
var shaHash = packet.ReadBytes(20);
Contract.Assume(unk3.Length == 4);
Contract.Assume(shaHash.Length == 20);
keys[key] = new AuthLogonKey(unk1, unk2, unk3, shaHash);
}
}
var securityFlags = (ExtraSecurityFlags)packet.ReadByte(); // can be safely ignored
if (securityFlags.HasFlag(ExtraSecurityFlags.PIN))
{
packet.ReadBytes(16); // pinRandom
packet.ReadBytes(20); // pinSha1
}
if (securityFlags.HasFlag(ExtraSecurityFlags.Matrix))
{
packet.ReadBytes(20); // matrixHmacResult
}
if (securityFlags.HasFlag(ExtraSecurityFlags.SecurityToken))
{
var tokenLength = packet.ReadByte();
packet.ReadBytes(tokenLength); // token
}
SRPServer srpData = client.UserData.SRP;
srpData.PublicEphemeralValueA = clientPublicEphemeralA;
var success = srpData.Validator.IsClientProofValid(clientResult);
if (success)
{
SendAuthenticationLogOnProofSuccess(client, srpData.Validator.ServerSessionKeyProof);
client.AddPermission(new AuthenticatedPermission());
}
else
SendAuthenticationLogOnProofFailure(client, AuthResult.FailUnknownAccount);
}
public static void HandleReconnectProof(IClient client, IncomingAuthPacket packet)
{
// MD5 hash of { AccountName, byte[16] random data }
BigInteger r1 = packet.ReadBigInteger(16);
// SHA1 hash of { AccountName, MD5 from above, ReconnectProof, SessionKey }
BigInteger r2 = packet.ReadBigInteger(20);
// SHA1 hash of { MD5 from above, byte[16] of 0's }
var r3 = packet.ReadBigInteger(20); // r3Data
var numKeys = packet.ReadByte();
if (numKeys > 0)
{
// only initialize the array if we actually HAVE keys
AuthLogonKey[] keys = new AuthLogonKey[numKeys];
for (byte key = 0; key < numKeys; key++)
{
var unk1 = packet.ReadInt16();
var unk2 = packet.ReadInt32();
var unk3 = packet.ReadBytes(4);
var shaHash = packet.ReadBytes(20);
keys[key] = new AuthLogonKey(unk1, unk2, unk3, shaHash);
}
}
SRPServer srpData = client.UserData.SRP;
string username = client.UserData.Username;
BigInteger rand = client.UserData.ReconnectRand;
// TODO fetch this from the database (or some other persistent storage)
//BigInteger sessionKey = null ?? new BigInteger(0);
BigInteger hash = srpData.Hash(new HashDataBroker(Encoding.ASCII.GetBytes(username)), r1, rand);
if (hash == r2)
{
SendReconnectProofSuccess(client);
client.AddPermission(new AuthenticatedPermission());
}
else
client.Disconnect();
}
public static void HandleReconnectChallenge(IClient client, IncomingAuthPacket packet)
{
// structure is the same as AuthenticationLogOnChallenge
Contract.Requires(client != null);
Contract.Requires(packet != null);
packet.ReadByte(); // unk
packet.ReadInt16(); // size
packet.ReadFourCC(); // gameName
packet.ReadByte(); // version1
packet.ReadByte(); // version2
packet.ReadByte(); // version3
packet.ReadInt16(); // build
packet.ReadFourCC(); // platform
packet.ReadFourCC(); // os
packet.ReadFourCC(); // country
packet.ReadInt32(); // timeZoneBias
packet.ReadInt32(); // ip
var usernameLength = packet.ReadByte();
var usernameBytes = packet.ReadBytes(usernameLength);
Encoding.ASCII.GetString(usernameBytes); // username
// TODO fetch this from the database (or some other persistent storage)
BigInteger sessionKey = null;
if (sessionKey == null) {
client.Disconnect();
return;
}
//BigInteger rand = new BigInteger(new FastRandom(), 16 * 8);
//SendReconnectChallengeSuccess(client, rand);
//client.UserData.ReconnectRand = rand;
//client.UserData.Username = username;
}