public static HttpRoutingCookie DecodeHttpRoutingCookie(byte[] key, string msg)
{
byte[] data = DecodeHttpRoutingCookieEx(key, msg);
if (data == null)
{
return(null);
}
HttpRoutingCookie cookie = new HttpRoutingCookie();
try
{
if (data[0] == 1) // Automatic routing cookie
{
cookie.version = 1;
cookie.nodeid = new byte[32];
Array.Copy(data, 1, cookie.nodeid, 0, 32); // Target nodeid
cookie.port = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(data, 33)); // Target port
cookie.tls = ((data[35] & 0x01) != 0); // Use TLS
cookie.oob = ((data[35] & 0x02) != 0); // Use OOB
cookie.ticks = BitConverter.ToInt64(data, 36); // Time Ticks
byte[] user = new byte[data[44]]; // Username length
Array.Copy(data, 45, user, 0, user.Length); // Username
cookie.username = UTF8Encoding.UTF8.GetString(user);
byte[] host = new byte[data[45 + user.Length]]; // Hostname length
Array.Copy(data, 46 + user.Length, host, 0, host.Length); // Hostname
cookie.hostname = UTF8Encoding.UTF8.GetString(host);
}
else if (data[0] == 2) // IPv4 Direct routing cookie
{
cookie.version = 2;
cookie.nodeid = new byte[32];
Array.Copy(data, 1, cookie.nodeid, 0, 32); // Relay nodeid
byte[] addr = new byte[4];
Array.Copy(data, 33, addr, 0, 4); // Target address
cookie.address = new IPAddress(addr);
cookie.port = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(data, 37)); // Target port
cookie.tls = ((data[39] & 0x01) != 0); // Use TLS
cookie.oob = ((data[39] & 0x02) != 0); // Use OOB
cookie.ticks = BitConverter.ToInt64(data, 40); // Time Ticks
byte[] user = new byte[data[48]]; // Username length
Array.Copy(data, 49, user, 0, user.Length); // Username
cookie.username = UTF8Encoding.UTF8.GetString(user);
byte[] host = new byte[data[49 + user.Length]]; // Hostname length
Array.Copy(data, 50 + user.Length, host, 0, host.Length); // Hostname
cookie.hostname = UTF8Encoding.UTF8.GetString(host);
}
// Check clock
DateTime t1 = new DateTime(cookie.ticks);
DateTime t2 = DateTime.UtcNow;
if (t1 > t2.AddMinutes(3) || t1.AddMinutes(60) < t2)
{
return(null);
}
}
catch (Exception) { return(null); }
return(cookie);
}
public static string EncodeHttpRoutingCookie(byte[] key, HttpRoutingCookie cookie)
{
if (key == null || key.Length != 50 || cookie.username == null || cookie.nodeid == null || cookie.nodeid.Length != 32 || cookie.hostname == null)
{
return(null);
}
byte[] user = UTF8Encoding.UTF8.GetBytes(cookie.username);
byte[] host = UTF8Encoding.UTF8.GetBytes(cookie.hostname);
if (user.Length > 250 || host.Length > 250)
{
return(null);
}
byte[] ticks = BitConverter.GetBytes(DateTime.UtcNow.Ticks);
byte flags = 0;
if (cookie.tls)
{
flags += 1;
}
if (cookie.oob)
{
flags += 2;
}
BinaryWriter bw = MeshUtils.GetBinaryWriter();
if (cookie.version == 1) // Automatic routing cookie
{
bw.Write((byte)1); // Cookie version
bw.Write(cookie.nodeid, 0, 32); // Target nodeid
bw.Write(IPAddress.HostToNetworkOrder((short)(cookie.port))); // Target port
bw.Write(flags); // Flags (Use TLS/OOB)
bw.Write(ticks, 0, 8); // Current time
bw.Write((byte)user.Length); // Username length
bw.Write(user, 0, user.Length); // Username
bw.Write((byte)host.Length); // Hostname length
bw.Write(host, 0, host.Length); // Hostname
}
else if (cookie.version == 2 && cookie.address != null && cookie.address.AddressFamily == AddressFamily.InterNetwork) // IPv4 Direct routing cookie
{
bw.Write((byte)2); // Cookie version
bw.Write(cookie.nodeid, 0, 32); // Relay nodeid
bw.Write(cookie.address.GetAddressBytes(), 0, 4); // Target IPv4 address
bw.Write(IPAddress.HostToNetworkOrder((short)(cookie.port))); // Target port
bw.Write(flags); // Flags (Use TLS/OOB)
bw.Write(ticks, 0, 8); // Current time
bw.Write((byte)user.Length); // Username length
bw.Write(user, 0, user.Length); // Username
bw.Write((byte)host.Length); // Hostname length
bw.Write(host, 0, host.Length); // Hostname
}
string r = EncodeHttpRoutingCookieEx(key, ((MemoryStream)bw.BaseStream).ToArray());
MeshUtils.RecycleBinaryWriter(bw);
return(r);
}
