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using System;
using System.Net.Sockets;
using System.IO;
using System.Security.Cryptography;
 
public class Test
{
	public static void Main()
	{
		string secret = "shienshenlhq";
string placa = "PGM1833";
 
string placaHash;
 
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
byte[] keyByte = encoding.GetBytes(secret);
byte[] messageBytes = encoding.GetBytes(placa);
using (HMACSHA1 hmacsha1 = new HMACSHA1(keyByte))
{
byte[] hashmessage = hmacsha1.ComputeHash(messageBytes);
placaHash = (HexStringFromBytes(hashmessage));
Console.WriteLine(placaHash);
}
 
string postData = "GT-S1312LAndroid1.1.14.1.4aplicativo177.206.169.90" + placaHash + "-3-38" + placa + "\n/sinesp-cidadao/ConsultaPlaca HTTP/1.1\r\r\n";
byte[] bytes = Encoding.UTF8.GetBytes(postData);
 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://s...content-available-to-author-only...v.br/sinesp-cidadao/ConsultaPlacaNovo27032014");
request.ProtocolVersion = HttpVersion.Version11;
request.Method = "POST";
request.Host = "sinespcidadao.sinesp.gov.br";
request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
request.ContentLength = bytes.Length;
 
Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes, 0, bytes.Length);
 
WebResponse response = request.GetResponse();
Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream);
 
var result = reader.ReadToEnd();
 
stream.Dispose();
reader.Dispose();
 
Console.WriteLine(result.ToString());
Console.ReadKey();
	}
 
	public static string HexStringFromBytes(byte[] bytes)
{
var sb = new StringBuilder();
foreach (byte b in bytes)
{
var hex = b.ToString("x2");
sb.Append(hex);
}
return sb.ToString();
}
}

prog.cs(26,16): error CS0103: The name `Encoding' does not exist in the current context
prog.cs(28,1): error CS0246: The type or namespace name `HttpWebRequest' could not be found. Are you missing `System.Net' using directive?
prog.cs(29,27): error CS0103: The name `HttpVersion' does not exist in the current context
prog.cs(29,1): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(30,1): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(31,1): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(32,1): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(33,1): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(35,24): error CS0841: A local variable `request' cannot be used before it is declared
prog.cs(38,1): error CS0246: The type or namespace name `WebResponse' could not be found. Are you missing `System.Net' using directive?
prog.cs(39,17): error CS0841: A local variable `response' cannot be used before it is declared
prog.cs(53,14): error CS0246: The type or namespace name `StringBuilder' could not be found. Are you missing `System.Text' using directive?
Compilation failed: 12 error(s), 0 warnings

Standard output is empty