public static byte[] MakeResponse(string coreUrl, long userId, long sessionID, string diffKey, string result)
{
long salt = OTP.GenerateRandomID();
long time = OTP.GetTime();
long length = result.Length;
byte[] saltArray = BitConverter.GetBytes(salt);
byte[] timeArray = BitConverter.GetBytes(time);
byte[] lengthArray = BitConverter.GetBytes(length);
byte[] sessionIDArray = BitConverter.GetBytes(sessionID);
byte[] DiffKey = Convert.FromBase64String(diffKey);
byte[] clearMsgKey = new byte
[saltArray.Length
+ sessionIDArray.Length
+ timeArray.Length
+ lengthArray.Length
];
Buffer.BlockCopy(saltArray, 0, clearMsgKey, 0, saltArray.Length);
Buffer.BlockCopy(sessionIDArray, 0, clearMsgKey, saltArray.Length, sessionIDArray.Length);
Buffer.BlockCopy(timeArray, 0, clearMsgKey, saltArray.Length + sessionIDArray.Length, timeArray.Length);
Buffer.BlockCopy(lengthArray, 0, clearMsgKey, saltArray.Length + sessionIDArray.Length + timeArray.Length, lengthArray.Length);
byte[] preRuntimeAESKey = new byte[DiffKey.Length + sessionIDArray.Length];
Buffer.BlockCopy(DiffKey, 0, preRuntimeAESKey, 0, DiffKey.Length);
Buffer.BlockCopy(sessionIDArray, 0, preRuntimeAESKey, DiffKey.Length, sessionIDArray.Length);
byte[] runtimeAESKey = SHA256.Create().ComputeHash(preRuntimeAESKey);
using (var ms = new MemoryStream())
using (var writer = new BinaryWriter(ms))
{
var msg = new AuthMessage(writer);
msg.addRow(clearMsgKey);
msg.addRow(coreUrl);
msg.addRow(result);
return(UserAuth.GenerateMessage(new AES(runtimeAESKey).Encrypt(ms.ToArray())));
}
}
public static byte[] GenerateMessage(params object[] rows)
{
using (var memory = new MemoryStream())
using (var writer = new BinaryWriter(memory))
{
var msg = new AuthMessage(writer);
foreach (var item in rows)
{
msg.addRow(item);
}
return(memory.ToArray());
}
}