private SetupCode GenerateSetupCode(string account, string secretKey, int qRPixelsPerModule = 0, string issuer = null)
{
if (account == null)
{
throw new NullReferenceException("Account is null");
}
account = account.Replace(" ", "");
string encodedSecretKey = Base32String.Base32Encode(secretKey);
string provisionUrl = null;
if (String.IsNullOrWhiteSpace(issuer))
{
provisionUrl = String.Format("otpauth://totp/{0}?secret={1}", account, encodedSecretKey);
}
else
{
// https://github.com/google/google-authenticator/wiki/Conflicting-Accounts
// Added additional prefix to account otpauth://totp/Company:[email protected] for backwards compatibility
provisionUrl = String.Format("otpauth://totp/{2}:{0}?secret={1}&issuer={2}", account, encodedSecretKey, UrlEncode(issuer));
}
var setupCode = new SetupCode();
setupCode.Account = account;
setupCode.QrCodeContent = provisionUrl;
setupCode.Issuer = issuer;
setupCode.SecretKey = secretKey;
setupCode.EncodedSecretKey = encodedSecretKey;
if (qRPixelsPerModule > 0)
{
using (QRCodeGenerator qrGenerator = new QRCodeGenerator())
using (QRCodeData qrCodeData = qrGenerator.CreateQrCode(provisionUrl, QRCodeGenerator.ECCLevel.Q))
using (QRCode qrCode = new QRCode(qrCodeData))
using (Bitmap qrCodeImage = qrCode.GetGraphic(qRPixelsPerModule))
using (MemoryStream ms = new MemoryStream())
{
qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
setupCode.QrCodeImageBase64 = Convert.ToBase64String(ms.ToArray());
setupCode.QrCodeImageBase64Url = "data:image/png;base64," + setupCode.QrCodeImageBase64;
}
}
return(setupCode);
}
/// <summary>
///
/// </summary>
/// <param name="account">Account</param>
/// <param name="secretKey">Account Secret Key</param>
/// <param name="secretIsBase32">Flag saying if accountSecretKey is in Base32 format or original secret</param>
/// <param name="qRPixelsPerModule">Number of pixels per QR Module (2 pixels give ~ 100x100px QRCode)</param>
/// <param name="issuer"></param>
/// <returns></returns>
public SetupCode GenerateSetupCode(string account, string secretKey, bool secretIsBase32, int qRPixelsPerModule = 0, string issuer = null)
{
secretKey = secretIsBase32 ? Base32String.Base32Decode(secretKey) : secretKey;
return(GenerateSetupCode(account, secretKey, qRPixelsPerModule, issuer));
}
