public string Encrypt(string target)
{
var key = "-----BEGIN PUBLIC KEY-----\YOURKEY\n-----END PUBLIC KEY-----";
var rsaProvider = PemKeyUtils.GetRSAProviderFromPemString(key);
RSAEncyptionManager manager = new RSAEncyptionManager(rsaProvider, RSAEncryptionPadding.Pkcs1);
return(Convert.ToBase64String(manager.Encrypt(target)));
}
protected override void OnCreate(Bundle savedInstanceState)
{
rsaProvider = PemKeyUtils.GetRSAProviderFromPemString(key);
base.OnCreate(savedInstanceState);
shp = Application.Context.GetSharedPreferences("ewosettings", FileCreationMode.Append);
edtr = shp.Edit();
if (!shp.Contains("Area"))
{
edtr.PutString("Area", "");
edtr.Commit();
}
if (!shp.Contains("name"))
{
edtr.PutString("name", "invalid");
edtr.Commit();
}
if (!shp.Contains("token"))
{
edtr.PutString("token", "invalid");
edtr.Commit();
}
if (!shp.Contains("record_id"))
{
edtr.PutString("record_id", "not_found");
edtr.Commit();
}
if (shp.GetString("record_id", "not_found") != "not_found")
{
StartActivity(typeof(MainActivity));
}
SetContentView(Resource.Layout.InitailSettings);
tv1 = FindViewById <TextView>(Resource.Id.textView1);
ed1 = FindViewById <EditText>(Resource.Id.tokenEdit);
phoneText = FindViewById <EditText>(Resource.Id.phoneEdit);
valText = FindViewById <EditText>(Resource.Id.validEditText);
emailText = FindViewById <EditText>(Resource.Id.emailEdit);
tokenID = FindViewById <TextView>(Resource.Id.tokenID);
tv2 = FindViewById <TextView>(Resource.Id.textView2);
tv4 = FindViewById <TextView>(Resource.Id.textView4);
tv5 = FindViewById <TextView>(Resource.Id.textView5);
tv6 = FindViewById <TextView>(Resource.Id.textView6);
tv7 = FindViewById <TextView>(Resource.Id.textView7);
tv8 = FindViewById <TextView>(Resource.Id.textView8);
userName = FindViewById <TextView>(Resource.Id.userNameText);
userDept = FindViewById <TextView>(Resource.Id.depText);
b1 = FindViewById <Button>(Resource.Id.button1);
b3 = FindViewById <Button>(Resource.Id.button3);
b2 = FindViewById <Button>(Resource.Id.button2);
b3.Click += requestValidation;
b2.Click += B2_Click;
b1.Click += B1_Click;
switchUI(true);
// Create your application here
}
public static string GetEncryptedPassword(this IInstaApi api, string password, long?providedTime = null)
{
var pubKey = api.GetLoggedUser().PublicKey;
var pubKeyId = api.GetLoggedUser().PublicKeyId;
byte[] randKey = new byte[32];
byte[] iv = new byte[12];
secureRandom.NextBytes(randKey, 0, randKey.Length);
secureRandom.NextBytes(iv, 0, iv.Length);
long time = providedTime ?? DateTime.UtcNow.ToUnixTime();
byte[] associatedData = Encoding.UTF8.GetBytes(time.ToString());
var pubKEY = Encoding.UTF8.GetString(Convert.FromBase64String(pubKey));
byte[] encryptedKey;
using (var rdr = PemKeyUtils.GetRSAProviderFromPemString(pubKEY.Trim()))
encryptedKey = rdr.Encrypt(randKey, false);
byte[] plaintext = Encoding.UTF8.GetBytes(password);
var cipher = new GcmBlockCipher(new AesEngine());
var parameters = new AeadParameters(new KeyParameter(randKey), 128, iv, associatedData);
cipher.Init(true, parameters);
var ciphertext = new byte[cipher.GetOutputSize(plaintext.Length)];
var len = cipher.ProcessBytes(plaintext, 0, plaintext.Length, ciphertext, 0);
cipher.DoFinal(ciphertext, len);
var con = new byte[plaintext.Length];
for (int i = 0; i < plaintext.Length; i++)
{
con[i] = ciphertext[i];
}
ciphertext = con;
var tag = cipher.GetMac();
byte[] buffersSize = BitConverter.GetBytes(Convert.ToInt16(encryptedKey.Length));
byte[] encKeyIdBytes = BitConverter.GetBytes(Convert.ToUInt16(pubKeyId));
if (BitConverter.IsLittleEndian)
{
Array.Reverse(encKeyIdBytes);
}
encKeyIdBytes[0] = 1;
var payload = Convert.ToBase64String(encKeyIdBytes.Concat(iv).Concat(buffersSize).Concat(encryptedKey).Concat(tag).Concat(ciphertext).ToArray());
return($"#PWD_INSTAGRAM:4:{time}:{payload}");
}
