public static byte[] LogonProof(IPacketReader packet)
{
byte[] A = packet.ReadBytes(32);
byte[] kM1 = packet.ReadBytes(20);
byte[] rA = A.Reverse().ToArray();
byte[] AB = A.Concat(B.GetBytes(32).Reverse()).ToArray();
if (new BigInteger(A) % new BigInteger(N) == 0)
{
return(new byte[1]);
}
using (SHA1 sha1 = new SHA1CryptoServiceProvider())
{
// SS_Hash
byte[] rU = sha1.ComputeHash(AB).Reverse().ToArray();
var s = V.ModPow(new BigInteger(rU), new BigInteger(RN)) * new BigInteger(rA);
s = s.ModPow(new BigInteger(RB), new BigInteger(RN));
byte[] S1 = new byte[16], S2 = new byte[16];
byte[] rS = s.GetBytes(32).Reverse().ToArray();
for (int t = 0; t < 16; t++)
{
S1[t] = rS[t * 2];
S2[t] = rS[(t * 2) + 1];
}
byte[] hashS1 = sha1.ComputeHash(S1), hashS2 = sha1.ComputeHash(S2);
byte[] ss_hash = new byte[hashS1.Length + hashS2.Length];
for (int t = 0; t < hashS1.Length; t++)
{
ss_hash[t * 2] = hashS1[t];
ss_hash[(t * 2) + 1] = hashS2[t];
}
// calc M1 & M2
byte[] NHash = sha1.ComputeHash(N);
byte[] GHash = sha1.ComputeHash(G.GetBytes());
var tmp = Enumerable.Range(0, 20)
.Select(t => (byte)(NHash[t] ^ GHash[t]))
.Concat(sha1.ComputeHash(BUsername))
.Concat(Salt)
.Concat(A)
.Concat(B.GetBytes(32).Reverse())
.Concat(ss_hash);
byte[] M1 = sha1.ComputeHash(tmp.ToArray());
byte[] M2 = sha1.ComputeHash(A.Concat(M1).Concat(ss_hash).ToArray());
// instantiate coders/cryptors
PacketCrypt = new PacketCrypt(ss_hash, ClientBuild);
// create packet data
byte[] result = new byte[GetLogonProofSize()];
result[0] = 1;
Array.Copy(M2, 0, result, 2, M2.Length);
return(result);
}
}
public static byte[] LogonChallenge(IPacketReader packet)
{
packet.ReadBytes(32); //Skip to username
BUsername = packet.ReadBytes(packet.ReadByte()); //Read username
string username = Encoding.ASCII.GetString(BUsername);
byte[] x;
using (SHA1 sha = new SHA1CryptoServiceProvider())
{
byte[] user = Encoding.ASCII.GetBytes(username.ToUpper() + ":" + Password.ToUpper());
byte[] res = Salt.Concat(sha.ComputeHash(user, 0, user.Length)).ToArray();
x = sha.ComputeHash(res, 0, res.Length).Reverse().ToArray();
}
byte[] b = new byte[20];
new Random().NextBytes(b);
RB = b.Reverse().ToArray();
G = new BigInteger(new byte[] { 7 });
V = G.ModPow(new BigInteger(x), new BigInteger(RN));
K = new BigInteger(new byte[] { 3 });
BigInteger temp = (K * V) + G.ModPow(new BigInteger(RB), new BigInteger(RN));
B = temp % new BigInteger(RN);
IEnumerable <byte> result = new byte[3]; //Opcode, 0, Success
result = result.Concat(B.GetBytes(32).Reverse());
result = result.Concat(new byte[] { 1, 7, 32 }); //1, G, 32
result = result.Concat(N);
result = result.Concat(Salt);
result = result.Concat(new byte[16]); //unknown, Security Flag
return(result.ToArray());
}
public void Read(IPacketReader reader)
{
Identifier = reader.ReadString().ToString();
var data = reader.ReadBytes((int)reader.Buffer.Length);
Data = new Memory <byte>(new byte[data.Length]);
data.CopyTo(Data.Span);
}
public static byte[] LogonChallenge(IPacketReader packet)
{
packet.Position = 11;
ClientBuild = packet.ReadUInt16();
packet.Position = 33; // Skip to username
BUsername = packet.ReadBytes(packet.ReadByte()); // Read username
string username = Encoding.ASCII.GetString(BUsername);
byte[] x;
using (SHA1 sha = new SHA1CryptoServiceProvider())
{
byte[] user = Encoding.ASCII.GetBytes(username.ToUpper() + ":" + Password.ToUpper());
byte[] res = Salt.Concat(sha.ComputeHash(user, 0, user.Length)).ToArray();
x = sha.ComputeHash(res, 0, res.Length).Reverse().ToArray();
}
byte[] b = new byte[20];
new Random().NextBytes(b);
RB = b.Reverse().ToArray();
G = new BigInteger(new byte[] { 7 });
V = G.ModPow(new BigInteger(x), new BigInteger(RN));
K = new BigInteger(new byte[] { 3 });
BigInteger temp = (K * V) + G.ModPow(new BigInteger(RB), new BigInteger(RN));
B = temp % new BigInteger(RN);
int size = ClientBuild < 5428 ? 118 : 119;
byte[] result = new byte[size];
Array.Copy(B.GetBytes(32).Reverse().ToArray(), 0, result, 3, 32);
result[35] = 1;
result[36] = 7;
result[37] = 32;
Array.Copy(N, 0, result, 38, N.Length);
Array.Copy(Salt, 0, result, 70, Salt.Length);
return(result);
}
public static byte[] LogonChallenge(IPacketReader packet)
{
packet.Position = 11;
ClientBuild = packet.ReadUInt16();
packet.Position = 33; // Skip to username
BUsername = packet.ReadBytes(packet.ReadByte()); // Read username
byte[] credshash;
using (SHA1 sha = new SHA1CryptoServiceProvider())
{
string username = Encoding.ASCII.GetString(BUsername);
byte[] credentials = Encoding.ASCII.GetBytes(username.ToUpper() + ":" + Password.ToUpper());
byte[] tmp = Salt.Concat(sha.ComputeHash(credentials)).ToArray();
credshash = sha.ComputeHash(tmp).Reverse().ToArray();
}
RB = new byte[20];
new Random().NextBytes(RB);
G = new BigInteger(new byte[] { 7 });
V = G.ModPow(new BigInteger(credshash), new BigInteger(RN));
K = new BigInteger(new byte[] { 3 });
B = ((K * V) + G.ModPow(new BigInteger(RB), new BigInteger(RN))) % new BigInteger(RN);
// create packet data
byte[] result = new byte[GetLogonChallengeSize()];
Array.Copy(B.GetBytes(32).Reverse().ToArray(), 0, result, 3, 32);
result[35] = 1;
result[36] = 7;
result[37] = 32;
Array.Copy(N, 0, result, 38, N.Length);
Array.Copy(Salt, 0, result, 70, Salt.Length);
return(result);
}
public static byte[] LogonProof(IPacketReader packet)
{
byte[] A = packet.ReadBytes(32);
byte[] kM1 = packet.ReadBytes(20);
byte[] rA = A.Reverse().ToArray();
byte[] AB = A.Concat(B.GetBytes(32).Reverse()).ToArray();
if (new BigInteger(A) % new BigInteger(N) == 0)
{
return(new byte[1]);
}
SHA1 sha = new SHA1CryptoServiceProvider();
byte[] rU = sha.ComputeHash(AB).Reverse().ToArray();
//SS_Hash
BigInteger s = V.ModPow(new BigInteger(rU), new BigInteger(RN));
s *= new BigInteger(rA);
s = s.ModPow(new BigInteger(RB), new BigInteger(RN));
byte[] S1 = new byte[16];
byte[] S2 = new byte[16];
byte[] S = s.GetBytes(32);
byte[] rS = S.Reverse().ToArray();
for (int t = 0; t < 16; t++)
{
S1[t] = rS[t * 2];
S2[t] = rS[(t * 2) + 1];
}
byte[] hashS1 = sha.ComputeHash(S1);
byte[] hashS2 = sha.ComputeHash(S2);
SS_Hash = new byte[hashS1.Length + hashS2.Length];
for (int t = 0; t < hashS1.Length; t++)
{
SS_Hash[t * 2] = hashS1[t];
SS_Hash[(t * 2) + 1] = hashS2[t];
}
//calc M1
byte[] M1;
byte[] NHash = sha.ComputeHash(N);
byte[] GHash = sha.ComputeHash(G.GetBytes());
byte[] NG_Hash = new byte[20];
for (int t = 0; t < 20; t++)
{
NG_Hash[t] = (byte)(NHash[t] ^ GHash[t]);
}
IEnumerable <byte> tmp = NG_Hash.Concat(sha.ComputeHash(BUsername));
tmp = tmp.Concat(Salt);
tmp = tmp.Concat(A);
tmp = tmp.Concat(B.GetBytes(32).Reverse());
tmp = tmp.Concat(SS_Hash);
M1 = sha.ComputeHash(tmp.ToArray());
//calc M2
byte[] M2;
tmp = A.Concat(M1);
tmp = tmp.Concat(SS_Hash);
M2 = sha.ComputeHash(tmp.ToArray());
sha.Dispose();
IEnumerable <byte> result = new byte[] { 1, 0 };
result = result.Concat(M2);
result = result.Concat(new byte[4]);
return(result.ToArray());
}
public static byte[] LogonProof(IPacketReader packet)
{
byte[] A = packet.ReadBytes(32);
byte[] kM1 = packet.ReadBytes(20);
byte[] rA = A.Reverse().ToArray();
byte[] AB = A.Concat(B.GetBytes(32).Reverse()).ToArray();
if (new BigInteger(A) % new BigInteger(N) == 0)
{
return(new byte[1]);
}
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] rU = sha1.ComputeHash(AB).Reverse().ToArray();
// SS_Hash
BigInteger s = V.ModPow(new BigInteger(rU), new BigInteger(RN));
s *= new BigInteger(rA);
s = s.ModPow(new BigInteger(RB), new BigInteger(RN));
byte[] S1 = new byte[16];
byte[] S2 = new byte[16];
byte[] S = s.GetBytes(32);
byte[] rS = S.Reverse().ToArray();
for (int t = 0; t < 16; t++)
{
S1[t] = rS[t * 2];
S2[t] = rS[(t * 2) + 1];
}
byte[] hashS1 = sha1.ComputeHash(S1);
byte[] hashS2 = sha1.ComputeHash(S2);
byte[] ss_hash = new byte[hashS1.Length + hashS2.Length];
for (int t = 0; t < hashS1.Length; t++)
{
ss_hash[t * 2] = hashS1[t];
ss_hash[(t * 2) + 1] = hashS2[t];
}
// calc M1
byte[] M1;
byte[] NHash = sha1.ComputeHash(N);
byte[] GHash = sha1.ComputeHash(G.GetBytes());
byte[] NG_Hash = new byte[20];
for (int t = 0; t < 20; t++)
{
NG_Hash[t] = (byte)(NHash[t] ^ GHash[t]);
}
var tmp = NG_Hash.Concat(sha1.ComputeHash(BUsername))
.Concat(Salt)
.Concat(A)
.Concat(B.GetBytes(32).Reverse())
.Concat(ss_hash);
M1 = sha1.ComputeHash(tmp.ToArray());
// calc M2
byte[] M2;
tmp = A.Concat(M1).Concat(ss_hash);
M2 = sha1.ComputeHash(tmp.ToArray());
sha1.Dispose();
// instantiate coders/cryptors
PacketCrypt = new PacketCrypt(ss_hash, ClientBuild);
// additional information, always zeroed
int extradata = 0;
if (ClientBuild < 6178 || ClientBuild == 6180)
{
extradata = 04; // uint unk
}
else if (ClientBuild < 8089)
{
extradata = 06; // uint unk, ushort unkFlags
}
else
{
extradata = 10; // uint account flag, uint surveyId, ushort unkFlags
}
byte[] result = new byte[22 + extradata];
result[0] = 1;
Array.Copy(M2, 0, result, 2, M2.Length);
return(result);
}
