/// <summary> /// Generate a setup code for a Google Authenticator user to scan /// </summary> /// <param name="issuer">Issuer ID (the name of the system, i.e. 'MyApp'), can be omitted but not recommended https://github.com/google/google-authenticator/wiki/Key-Uri-Format </param> /// <param name="accountTitleNoSpaces">Account Title (no spaces)</param> /// <param name="accountSecretKey">Account Secret Key as byte[]</param> /// <param name="QRPixelsPerModule">Number of pixels per QR Module (2 = ~120x120px QRCode)</param> /// <returns>SetupCode object</returns> public SetupCode GenerateSetupCode(string issuer, string accountTitleNoSpaces, byte[] accountSecretKey, int QRPixelsPerModule) { if (accountTitleNoSpaces == null) { throw new NullReferenceException("Account Title is null"); } accountTitleNoSpaces = RemoveWhitespace(accountTitleNoSpaces); string encodedSecretKey = Base32Encoding.ToString(accountSecretKey); string provisionUrl = null; //otpauth://totp/Google:[email protected]?secret=xxxx&issuer=Google provisionUrl = String.Format("otpauth://totp/{2}:{0}?secret={1}&issuer={2}", accountTitleNoSpaces, encodedSecretKey.Replace("=", ""), UrlEncode(issuer)); using (QRCodeGenerator qrGenerator = new QRCodeGenerator()) using (QRCodeData qrCodeData = qrGenerator.CreateQrCode(provisionUrl, QRCodeGenerator.ECCLevel.M)) 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); return(new SetupCode(accountTitleNoSpaces, encodedSecretKey, String.Format("data:image/png;base64,{0}", Convert.ToBase64String(ms.ToArray())))); } }
/// <summary> /// Generate a setup code for a Google Authenticator user to scan /// </summary> /// <param name="issuer">Issuer ID (the name of the system, i.e. 'MyApp'), can be omitted but not recommended https://github.com/google/google-authenticator/wiki/Key-Uri-Format </param> /// <param name="accountTitleNoSpaces">Account Title (no spaces)</param> /// <param name="accountSecretKey">Account Secret Key</param> /// <param name="QRPixelsPerModule">Number of pixels per QR Module (2 pixels give ~ 100x100px QRCode)</param> /// <returns>SetupCode object</returns> public SetupCode GenerateSetupCode(string issuer, string accountTitleNoSpaces, string accountSecretKey, int QRPixelsPerModule) { //byte[] key = Encoding.UTF8.GetBytes(accountSecretKey); byte[] key = Base32Encoding.ToBytes(accountSecretKey); return(GenerateSetupCode(issuer, accountTitleNoSpaces, key, QRPixelsPerModule)); }
internal string GenerateHashedCode(string secret, long iterationNumber, int digits = 6) { // byte[] key = Encoding.UTF8.GetBytes(secret); byte[] key = Base32Encoding.ToBytes(secret); return(GenerateHashedCode(key, iterationNumber, digits)); }