private clsResponse QRCode(string content)
{
clsResponse objResponse = new clsResponse();
try
{
QrEncoder enc = new QrEncoder(ErrorCorrectionLevel.H);
var code = enc.Encode(content);
//---------------------------------------------------------------
GraphicsRenderer r = new GraphicsRenderer(new FixedCodeSize(5, QuietZoneModules.Zero), Brushes.Black, Brushes.White);
using (MemoryStream ms = new MemoryStream())
{
r.WriteToStream(code.Matrix, ImageFormat.Png, ms);
byte[] image = ms.ToArray();
objResponse.Base64String = string.Format(@"<img src=""data:image/png;base64,{0}"" alt=""{1}"" />", Convert.ToBase64String(image), content);
}
//---------------------------------------------------------------
objResponse.StatusCode = 200;
}
catch (Exception ex)
{
objResponse.StatusCode = 404;
objResponse.StatusText = ex.Message.ToString() + ", Inner : " + ex.InnerException.Message.ToString();
}
return(objResponse);
}
private clsResponse GenerateSecret(int length)
{
clsResponse objResponse = new clsResponse();
try
{
byte[] buffer = new byte[9];
using (RandomNumberGenerator rng = RNGCryptoServiceProvider.Create())
{
rng.GetBytes(buffer);
}
// Generates a 10 character string of A-Z, a-z, 0-9
// Don't need to worry about any = padding from the
// Base64 encoding, since our input buffer is divisible by 3
string TwoFactorSecret = Convert.ToBase64String(buffer).Substring(0, 10).Replace('/', '0').Replace('+', '1');
var key = new Base32Encoder().Encode(Encoding.ASCII.GetBytes(TwoFactorSecret));
objResponse.StatusCode = 200;
objResponse.TwoFactorSecret = TwoFactorSecret;
objResponse.EncodedKey = key;
}
catch (Exception ex)
{
objResponse.StatusCode = 404;
objResponse.StatusText = ex.Message.ToString();
}
return(objResponse);
}
private string GenerateQRCode(MTwoFactAuthencation param)
{
string strQRCode = string.Empty;
string AuthenticatorUri = GenerateQrCodeUri(param.UserName, param.Secret);
clsResponse objResponseMongo = QRCode(AuthenticatorUri);
if (objResponseMongo.StatusCode == 200)
{
strQRCode = objResponseMongo.Base64String;
}
else
{
strQRCode = objResponseMongo.StatusText;
}
return(strQRCode);
}
private clsResponse SaveinMongo(MTwoFactAuthencation param, clsResponse prmResponse)
{
clsResponse objResponse = new clsResponse();
try
{
var colPurge = mongoDatabase.GetCollection <BsonDocument>(strMongoDBTableName);
var docPurge = new BsonDocument
{
{ "UserName", param.UserName }, { "Secret", prmResponse.TwoFactorSecret }, { "Status", 0 }
};
colPurge.Insert(docPurge);
objResponse.StatusCode = 200;
}
catch (Exception ex)
{
objResponse.StatusCode = 404;
objResponse.StatusText = ex.Message.ToString();
}
return(objResponse);
}
public clsReturn Is2FAEnable(string UserName)
{
clsReturn objResponseMain = new clsReturn();
try
{
var _success = false;
var colPurge = mongoDatabase.GetCollection <BsonDocument>(strMongoDBTableName);
var Detail = mongoDatabase.GetCollection <MTwoFactAuthencation>(strMongoDBTableName).FindAll().Where(t => t.UserName.ToLower() == UserName.ToLower());
string strSecret = Detail.Select(t => t.Secret).FirstOrDefault();
int intStatus = Detail.Select(t => t.Status).FirstOrDefault();
if (strSecret == null || strSecret == "")
{
_success = false;
}
else
{
_success = true;
}
if (_success == false)
{
clsResponse objResponseGenSecret = GenerateSecret(16);
if (objResponseGenSecret.StatusCode != 200)
{
return(objResponseMain);
}
MTwoFactAuthencation objMTwoFactAuthencation = new MTwoFactAuthencation();
objMTwoFactAuthencation.UserName = UserName;
objMTwoFactAuthencation.Secret = objResponseGenSecret.EncodedKey;
objResponseMain.Response = GenerateQRCode(objMTwoFactAuthencation);
clsResponse objResponseMongo = SaveinMongo(objMTwoFactAuthencation, objResponseGenSecret);
if (objResponseMongo.StatusCode != 200)
{
return(objResponseMain);
}
}
else
{
if (intStatus == 0)
{
MTwoFactAuthencation objMTwoFactAuthencation = new MTwoFactAuthencation();
objMTwoFactAuthencation.UserName = UserName;
objMTwoFactAuthencation.Secret = new Base32Encoder().Encode(Encoding.ASCII.GetBytes(strSecret));
objResponseMain.Response = GenerateQRCode(objMTwoFactAuthencation);
}
}
objResponseMain.StatusCode = 200;
}
catch (Exception ex)
{
objResponseMain.StatusCode = 404;
objResponseMain.StatusText = ex.Message.ToString();
}
string strJson = JsonConvert.SerializeObject(objResponseMain);
return(objResponseMain);
}
