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)); }