public string DecodeFile(bool checkMD5, string fileName, string outDir, string key)
{
string f_inp = Path.GetFileName(fileName);
string[] text = System.IO.File.ReadAllLines(fileName);
string f_out = "", name = "", Hash = "", sFile = "", sMD5 = "", plantext = "";
if (Path.GetExtension(fileName) == ".acm")
{
if (text[0].Contains("ACM"))
{
name = text[1].Replace("File=", "");
f_out = outDir + "\\" + name;
Hash = text[2].Replace("Hash=", "");
sFile = text[6];
plantext = Crypto_Utils.DecryptAES(sFile, key);
sMD5 = Crypto_Utils.HashMD5(plantext); //cambio acm con testo in chiaro
if (checkMD5)
{
if (sMD5 == Hash)
{
//MessageBox.Show("uguale");
}
else
{
return("MD5 non corretto");
//MessageBox.Show("diverso");
}
}
if (name == "" || name == null)
{
return("Il file non è nel formato corretto o non può essere decriptato");
}
else
{
StringBuilder sb = new StringBuilder();
sb.Append(plantext);
if (File.Exists(f_out))
{
//MessageBox.Show(f_out + " esiste");
File.WriteAllText(outDir + "\\" + "new_" + name, sb.ToString());
return("Percorso: " + f_out + "\n File " + name + " decriptato");
}
else
{
File.WriteAllText(f_out, sb.ToString());
return("Percorso: " + f_out + "\n File " + name + " decriptato");
}
}
}
return("Contenuto del file non corretto!");
}
return("Estensione del file non corretta!");
}
public void Test_Base64()
{
string Text1 = "Man";
string Code1 = "TWFu";
Assert.AreEqual(Text1, Crypto_Utils.Base64_Decode(Code1));
Assert.AreEqual(Code1, Crypto_Utils.Base64_Encode(Text1));
string Text2 = "I.T.T. Marconi Rovereto";
string Code2 = "SS5ULlQuIE1hcmNvbmkgUm92ZXJldG8=";
Assert.AreEqual(Text2, Crypto_Utils.Base64_Decode(Code2));
Assert.AreEqual(Code2, Crypto_Utils.Base64_Encode(Text2));
Assert.AreNotEqual(Code2, Crypto_Utils.Base64_Encode("ITT - Marconi Rovereto"));
}
public void Test_RSA()
{
var pubKey_1 = "<RSAKeyValue><Modulus>21wEnTU+mcD2w0Lfo1Gv4rtcSWsQJQTNa6gio05AOkV/Er9w3Y13Ddo5wGtjJ19402S71HUeN0vbKILLJdRSES5MHSdJPSVrOqdrll/vLXxDxWs/U0UT1c8u6k/Ogx9hTtZxYwoeYqdhDblof3E75d9n2F0Zvf6iTb4cI7j6fMs=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
var priKey_1 = "<RSAKeyValue><Modulus>21wEnTU+mcD2w0Lfo1Gv4rtcSWsQJQTNa6gio05AOkV/Er9w3Y13Ddo5wGtjJ19402S71HUeN0vbKILLJdRSES5MHSdJPSVrOqdrll/vLXxDxWs/U0UT1c8u6k/Ogx9hTtZxYwoeYqdhDblof3E75d9n2F0Zvf6iTb4cI7j6fMs=</Modulus><Exponent>AQAB</Exponent><P>/aULPE6jd5IkwtWXmReyMUhmI/nfwfkQSyl7tsg2PKdpcxk4mpPZUdEQhHQLvE84w2DhTyYkPHCtq/mMKE3MHw==</P><Q>3WV46X9Arg2l9cxb67KVlNVXyCqc/w+LWt/tbhLJvV2xCF/0rWKPsBJ9MC6cquaqNPxWWEav8RAVbmmGrJt51Q==</Q><DP>8TuZFgBMpBoQcGUoS2goB4st6aVq1FcG0hVgHhUI0GMAfYFNPmbDV3cY2IBt8Oj/uYJYhyhlaj5YTqmGTYbATQ==</DP><DQ>FIoVbZQgrAUYIHWVEYi/187zFd7eMct/Yi7kGBImJStMATrluDAspGkStCWe4zwDDmdam1XzfKnBUzz3AYxrAQ==</DQ><InverseQ>QPU3Tmt8nznSgYZ+5jUo9E0SfjiTu435ihANiHqqjasaUNvOHKumqzuBZ8NRtkUhS6dsOEb8A2ODvy7KswUxyA==</InverseQ><D>cgoRoAUpSVfHMdYXW9nA3dfX75dIamZnwPtFHq80ttagbIe4ToYYCcyUz5NElhiNQSESgS5uCgNWqWXt5PnPu4XmCXx6utco1UVH8HGLahzbAnSy6Cj3iUIQ7Gj+9gQ7PkC434HTtHazmxVgIR5l56ZjoQ8yGNCPZnsdYEmhJWk=</D></RSAKeyValue>";
var testo__1 = "testing ...";
var testo__2 = "Hello World!";
var s1_enc = Crypto_Utils.EncryptRSA(testo__1, pubKey_1);
var s1_dec = Crypto_Utils.DecryptRSA(s1_enc, priKey_1);
Assert.AreEqual(s1_dec, testo__1);
var s2_enc = Crypto_Utils.EncryptRSA(testo__2, pubKey_1);
var s2_dec = Crypto_Utils.DecryptRSA(s2_enc, priKey_1);
Assert.AreEqual(s2_dec, testo__2);
}
public static void Decode(string[] args)
{
Console.WriteLine("Decode ... ");
if (Check(args))
{
// verifica parametri e decifrare
string Keyfilename = File.ReadAllText(args[1]);
string inputfilename = File.ReadAllText(args[2]);
string RSA = Crypto_Utils.DecryptRSA(inputfilename, Keyfilename);
Console.WriteLine(RSA);
File.WriteAllText(args[3], RSA);
Console.WriteLine("Decode completed ");
}
else
{
Console.WriteLine("Decode failed");
}
}
/// <summary>
/// Metodo per cifrare un file in formato ACM (Algoritmo Crittografico Marconi)
/// </summary>
/// <param name="fileName">Nome del file es: "c:\lavoro-temp\prova.txt"</param>
/// <param name="outDir">Directory di output es: "c:\lavoro-temp"</param>
/// <param name="key">Chiave simmetrica di cifratura</param>
/// <returns>Log dell'azione o di ventuali errori</returns>
public string EncodeFile(string fileName, string outDir, string key)
{
string f_inp = Path.GetFileName(fileName);
string f_out = Path.ChangeExtension(outDir + "\\" + f_inp, "acm");
string sFile = File.ReadAllText(fileName);
string sMD5 = Crypto_Utils.HashMD5(sFile);
string sACM = Crypto_Utils.EncryptAES(sFile, key);
StringBuilder sb = new StringBuilder();
sb.AppendLine("ACM");
sb.AppendLine("File=" + f_inp);
sb.AppendLine("Hash=" + sMD5);
sb.AppendLine("Size=" + sACM.Length);
sb.AppendLine("Type=AES");
sb.AppendLine("@@@@@");
sb.Append(sACM);
//MessageBox.Show(f_out);
//MessageBox.Show(sb.ToString());
File.WriteAllText(f_out, sb.ToString());
return("Percorso: " + f_out + "\n File " + f_inp + " criptato");
}
public string Md5FileString(string fileName)
{
return(Crypto_Utils.HashMD5(File.ReadAllText(fileName)));
}
