public ProxyInfo(ProxyType proxyType, IPEndPoint proxyEndPoint, NetworkCredential proxyCredential)
{
FProxyType = proxyType;
FProxyEndPoint = proxyEndPoint;
FProxyCredential = proxyCredential;
FSOCKS5Phase = SOCKS5Phase.spIdle;
}
public ProxyInfo(ProxyType proxyType, IPEndPoint proxyEndPoint, NetworkCredential proxyCredential)
{
fProxyType = proxyType;
fProxyEndPoint = proxyEndPoint;
fProxyCredential = proxyCredential;
fSOCKS5Phase = SOCKS5Phase.spIdle;
}
internal byte[] GetProxyRequestData(IPEndPoint remoteEndPoint)
{
byte[] result = null;
switch (FProxyType)
{
case ProxyType.ptHTTP:
if (FProxyCredential == null)
{
result = Encoding.GetEncoding(1252).GetBytes(String.Format("CONNECT {0}:{1} HTTP/1.1\r\nnHost: {0}:{1}\r\n\r\n", remoteEndPoint.Address, remoteEndPoint.Port));
}
else
{
string base64Encoding = Convert.ToBase64String(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName + ":" + FProxyCredential.Password));
result = Encoding.GetEncoding(1252).GetBytes(String.Format("CONNECT {0}:{1} HTTP/1.1\r\nHost: {0}:{1}\r\nAuthorization: Basic {2}\r\nProxy-Authorization: Basic {2}\r\n\r\n", remoteEndPoint.Address, remoteEndPoint.Port, base64Encoding));
}
break;
case ProxyType.ptSOCKS4:
case ProxyType.ptSOCKS4a:
if (FProxyType == ProxyType.ptSOCKS4)
{
if (FProxyCredential == null)
{
result = new byte[8 + 1];
}
else
{
result = new byte[8 + FProxyCredential.UserName.Length + 1];
}
}
else
{
if (FProxyCredential == null)
{
result = new byte[8 + 1 + 1];
}
else
{
result = new byte[8 + FProxyCredential.UserName.Length + 1 + FProxyCredential.Domain.Length + 1];
}
}
result[0] = 4;
result[1] = 1;
result[2] = Convert.ToByte((remoteEndPoint.Port & 0xFF00) >> 8);
result[3] = Convert.ToByte(remoteEndPoint.Port & 0xFF);
if (FProxyType == ProxyType.ptSOCKS4)
{
Buffer.BlockCopy(remoteEndPoint.Address.GetAddressBytes(), 0, result, 4, 4);
}
else
{
result[4] = 0;
result[5] = 0;
result[6] = 0;
result[7] = 1;
}
if ( (FProxyCredential != null) && (FProxyCredential.UserName != null) )
{
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName), 0, result, 8, FProxyCredential.UserName.Length);
}
if ( (FProxyType == ProxyType.ptSOCKS4a) && (FProxyCredential != null) )
{
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.Domain), 0, result, 8 + FProxyCredential.UserName.Length + 1, FProxyCredential.Domain.Length);
}
break;
case ProxyType.ptSOCKS5:
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spIdle:
if (FProxyCredential == null)
{
result = new byte[3];
result[0] = 5;
result[1] = 1;
result[2] = 0;
}
else
{
result = new byte[4];
result[0] = 5;
result[1] = 2;
result[2] = 0;
result[3] = 2;
}
FSOCKS5Phase = SOCKS5Phase.spGreeting;
break;
case SOCKS5Phase.spConnecting:
result = new byte[10];
result[0] = 5;
result[1] = 1;
result[2] = 0;
result[3] = 1;
Buffer.BlockCopy(remoteEndPoint.Address.GetAddressBytes(), 0, result, 4, 4);
result[8] = Convert.ToByte((remoteEndPoint.Port & 0xFF00) >> 8);
result[9] = Convert.ToByte(remoteEndPoint.Port & 0xFF);
break;
case SOCKS5Phase.spAuthenticating:
result = new byte[3 + FProxyCredential.UserName.Length + FProxyCredential.Password.Length];
result[0] = 5;
result[1] = Convert.ToByte(FProxyCredential.UserName.Length);
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName), 0, result, 2, FProxyCredential.UserName.Length);
int passOffSet = 2 + FProxyCredential.UserName.Length;
result[passOffSet] = Convert.ToByte(FProxyCredential.Password.Length);
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.Password), 0, result, passOffSet + 1, FProxyCredential.Password.Length);
break;
}
break;
}
return result;
}
internal void GetProxyResponseStatus(byte[] response)
{
switch (FProxyType)
{
case ProxyType.ptHTTP:
Match m = Regex.Match(Encoding.GetEncoding(1252).GetString(response), @"[HTTP/]\d[.]\d\s(?<code>\d+)\s(?<reason>.+)");
if (m.Success)
{
int code = Convert.ToInt32(m.Groups["code"].Value);
if (code >= 200 && code <= 299)
{
FCompleted = true;
}
else
{
throw new ProxyAuthenticationException(code, m.Groups["reason"].Value);
}
}
else
{
throw new ProxyAuthenticationException(0, "Invalid proxy message response.");
}
break;
case ProxyType.ptSOCKS4:
case ProxyType.ptSOCKS4a:
if (response[1] == 0x5A)
{
FCompleted = true;
}
else
{
switch (response[1])
{
case 0x5B:
throw new ProxyAuthenticationException(response[1], "Request rejected or failed.");
case 0x5C:
throw new ProxyAuthenticationException(response[1], "Client is not running identd.");
case 0x5D:
throw new ProxyAuthenticationException(response[1], "Client's identd could not confirm the user ID string in the request.");
}
}
break;
case ProxyType.ptSOCKS5:
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spGreeting:
if (response[1] != 0xFF)
{
FSOCKS5Authentication = (SOCKS5AuthMode)Enum.ToObject(typeof(SOCKS5AuthMode), response[1]);
switch (FSOCKS5Authentication)
{
case SOCKS5AuthMode.saNoAuth:
FSOCKS5Phase = SOCKS5Phase.spConnecting;
break;
case SOCKS5AuthMode.ssUserPass:
FSOCKS5Phase = SOCKS5Phase.spAuthenticating;
break;
}
}
else
{
throw new ProxyAuthenticationException(0xFF, "Authentication method not supported.");
}
break;
case SOCKS5Phase.spConnecting:
case SOCKS5Phase.spAuthenticating:
if (response[1] == 0x00)
{
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spConnecting:
FCompleted = true;
break;
case SOCKS5Phase.spAuthenticating:
FSOCKS5Phase = SOCKS5Phase.spConnecting;
break;
}
}
else
{
switch (response[1])
{
case 0x01:
throw new ProxyAuthenticationException(response[1], "General Failure.");
case 0x02:
throw new ProxyAuthenticationException(response[1], "Connection not allowed by ruleset.");
case 0x03:
throw new ProxyAuthenticationException(response[1], "Network unreachable.");
case 0x04:
throw new ProxyAuthenticationException(response[1], "Host unreachable.");
case 0x05:
throw new ProxyAuthenticationException(response[1], "Connection refused by destination host.");
case 0x06:
throw new ProxyAuthenticationException(response[1], "TTL expired.");
case 0x07:
throw new ProxyAuthenticationException(response[1], "Command not supported / protocol error.");
case 0x08:
throw new ProxyAuthenticationException(response[1], "Address type not supported.");
}
}
break;
}
break;
}
}
internal byte[] GetProxyRequestData(IPEndPoint remoteEndPoint)
{
byte[] result = null;
switch (FProxyType)
{
case ProxyType.ptHTTP:
if (FProxyCredential == null)
{
result = Encoding.GetEncoding(1252).GetBytes(String.Format("CONNECT {0}:{1} HTTP/1.1\r\nnHost: {0}:{1}\r\n\r\n", remoteEndPoint.Address, remoteEndPoint.Port));
}
else
{
string base64Encoding = Convert.ToBase64String(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName + ":" + FProxyCredential.Password));
result = Encoding.GetEncoding(1252).GetBytes(String.Format("CONNECT {0}:{1} HTTP/1.1\r\nHost: {0}:{1}\r\nAuthorization: Basic {2}\r\nProxy-Authorization: Basic {2}\r\n\r\n", remoteEndPoint.Address, remoteEndPoint.Port, base64Encoding));
}
break;
case ProxyType.ptSOCKS4:
case ProxyType.ptSOCKS4a:
if (FProxyType == ProxyType.ptSOCKS4)
{
if (FProxyCredential == null)
{
result = new byte[8 + 1];
}
else
{
result = new byte[8 + FProxyCredential.UserName.Length + 1];
}
}
else
{
if (FProxyCredential == null)
{
result = new byte[8 + 1 + 1];
}
else
{
result = new byte[8 + FProxyCredential.UserName.Length + 1 + FProxyCredential.Domain.Length + 1];
}
}
result[0] = 4;
result[1] = 1;
result[2] = Convert.ToByte((remoteEndPoint.Port & 0xFF00) >> 8);
result[3] = Convert.ToByte(remoteEndPoint.Port & 0xFF);
if (FProxyType == ProxyType.ptSOCKS4)
{
Buffer.BlockCopy(remoteEndPoint.Address.GetAddressBytes(), 0, result, 4, 4);
}
else
{
result[4] = 0;
result[5] = 0;
result[6] = 0;
result[7] = 1;
}
if ((FProxyCredential != null) && (FProxyCredential.UserName != null))
{
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName), 0, result, 8, FProxyCredential.UserName.Length);
}
if ((FProxyType == ProxyType.ptSOCKS4a) && (FProxyCredential != null))
{
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.Domain), 0, result, 8 + FProxyCredential.UserName.Length + 1, FProxyCredential.Domain.Length);
}
break;
case ProxyType.ptSOCKS5:
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spIdle:
if (FProxyCredential == null)
{
result = new byte[3];
result[0] = 5;
result[1] = 1;
result[2] = 0;
}
else
{
result = new byte[4];
result[0] = 5;
result[1] = 2;
result[2] = 0;
result[3] = 2;
}
FSOCKS5Phase = SOCKS5Phase.spGreeting;
break;
case SOCKS5Phase.spConnecting:
result = new byte[10];
result[0] = 5;
result[1] = 1;
result[2] = 0;
result[3] = 1;
Buffer.BlockCopy(remoteEndPoint.Address.GetAddressBytes(), 0, result, 4, 4);
result[8] = Convert.ToByte((remoteEndPoint.Port & 0xFF00) >> 8);
result[9] = Convert.ToByte(remoteEndPoint.Port & 0xFF);
break;
case SOCKS5Phase.spAuthenticating:
result = new byte[3 + FProxyCredential.UserName.Length + FProxyCredential.Password.Length];
result[0] = 5;
result[1] = Convert.ToByte(FProxyCredential.UserName.Length);
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.UserName), 0, result, 2, FProxyCredential.UserName.Length);
int passOffSet = 2 + FProxyCredential.UserName.Length;
result[passOffSet] = Convert.ToByte(FProxyCredential.Password.Length);
Buffer.BlockCopy(Encoding.GetEncoding(1252).GetBytes(FProxyCredential.Password), 0, result, passOffSet + 1, FProxyCredential.Password.Length);
break;
}
break;
}
return(result);
}
internal void GetProxyResponseStatus(byte[] response)
{
switch (FProxyType)
{
case ProxyType.ptHTTP:
Match m = Regex.Match(Encoding.GetEncoding(1252).GetString(response), @"[HTTP/]\d[.]\d\s(?<code>\d+)\s(?<reason>.+)");
if (m.Success)
{
int code = Convert.ToInt32(m.Groups["code"].Value);
if (code >= 200 && code <= 299)
{
FCompleted = true;
}
else
{
throw new ProxyAuthenticationException(code, m.Groups["reason"].Value);
}
}
else
{
throw new ProxyAuthenticationException(0, "Invalid proxy message response.");
}
break;
case ProxyType.ptSOCKS4:
case ProxyType.ptSOCKS4a:
if (response[1] == 0x5A)
{
FCompleted = true;
}
else
{
switch (response[1])
{
case 0x5B:
throw new ProxyAuthenticationException(response[1], "Request rejected or failed.");
case 0x5C:
throw new ProxyAuthenticationException(response[1], "Client is not running identd.");
case 0x5D:
throw new ProxyAuthenticationException(response[1], "Client's identd could not confirm the user ID string in the request.");
}
}
break;
case ProxyType.ptSOCKS5:
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spGreeting:
if (response[1] != 0xFF)
{
FSOCKS5Authentication = (SOCKS5AuthMode)Enum.ToObject(typeof(SOCKS5AuthMode), response[1]);
switch (FSOCKS5Authentication)
{
case SOCKS5AuthMode.saNoAuth:
FSOCKS5Phase = SOCKS5Phase.spConnecting;
break;
case SOCKS5AuthMode.ssUserPass:
FSOCKS5Phase = SOCKS5Phase.spAuthenticating;
break;
}
}
else
{
throw new ProxyAuthenticationException(0xFF, "Authentication method not supported.");
}
break;
case SOCKS5Phase.spConnecting:
case SOCKS5Phase.spAuthenticating:
if (response[1] == 0x00)
{
switch (FSOCKS5Phase)
{
case SOCKS5Phase.spConnecting:
FCompleted = true;
break;
case SOCKS5Phase.spAuthenticating:
FSOCKS5Phase = SOCKS5Phase.spConnecting;
break;
}
}
else
{
switch (response[1])
{
case 0x01:
throw new ProxyAuthenticationException(response[1], "General Failure.");
case 0x02:
throw new ProxyAuthenticationException(response[1], "Connection not allowed by ruleset.");
case 0x03:
throw new ProxyAuthenticationException(response[1], "Network unreachable.");
case 0x04:
throw new ProxyAuthenticationException(response[1], "Host unreachable.");
case 0x05:
throw new ProxyAuthenticationException(response[1], "Connection refused by destination host.");
case 0x06:
throw new ProxyAuthenticationException(response[1], "TTL expired.");
case 0x07:
throw new ProxyAuthenticationException(response[1], "Command not supported / protocol error.");
case 0x08:
throw new ProxyAuthenticationException(response[1], "Address type not supported.");
}
}
break;
}
break;
}
}
