/// <summary>
/// Import a file containing authenticators in the KeyUriFormat. The file might be plain text, encrypted zip or encrypted pgp.
/// </summary>
/// <param name="parent">parent Form</param>
/// <param name="file">file name to import</param>
/// <returns>list of imported authenticators</returns>
public static List<WinAuthAuthenticator> ImportAuthenticators(Form parent, string file)
{
List<WinAuthAuthenticator> authenticators = new List<WinAuthAuthenticator>();
string password = null;
string pgpKey = null;
StringBuilder lines = new StringBuilder();
bool retry;
do
{
retry = false;
lines.Length = 0;
// open the zip file
if (string.Compare(Path.GetExtension(file), ".zip", true) == 0)
{
using (var fs = new FileStream(file, FileMode.Open, FileAccess.Read))
{
ZipFile zip = null;
try
{
zip = new ZipFile(fs);
if (string.IsNullOrEmpty(password) == false)
{
zip.Password = password;
}
byte[] buffer = new byte[4096];
foreach (ZipEntry entry in zip)
{
if (entry.IsFile == false || string.Compare(Path.GetExtension(entry.Name), ".txt", true) != 0)
{
continue;
}
// read file out
Stream zs = zip.GetInputStream(entry);
using (var ms = new MemoryStream())
{
StreamUtils.Copy(zs, ms, buffer);
// get as string and append
ms.Seek(0, SeekOrigin.Begin);
using (var sr = new StreamReader(ms))
{
lines.Append(sr.ReadToEnd()).Append(Environment.NewLine);
}
}
}
}
catch (ZipException ex)
{
if (ex.Message.IndexOf("password") != -1)
{
// already have a password
if (string.IsNullOrEmpty(password) == false)
{
WinAuthForm.ErrorDialog(parent, strings.InvalidPassword, ex.InnerException, MessageBoxButtons.OK);
}
// need password
GetPasswordForm form = new GetPasswordForm();
if (form.ShowDialog(parent) == DialogResult.Cancel)
{
return null;
}
password = form.Password;
retry = true;
continue;
}
throw;
}
finally
{
if (zip != null)
{
zip.IsStreamOwner = true;
zip.Close();
}
}
}
}
else if (string.Compare(Path.GetExtension(file), ".pgp", true) == 0)
{
string encoded = File.ReadAllText(file);
if (string.IsNullOrEmpty(pgpKey) == true)
{
// need password
GetPGPKeyForm form = new GetPGPKeyForm();
if (form.ShowDialog(parent) == DialogResult.Cancel)
{
return null;
}
pgpKey = form.PGPKey;
password = form.Password;
retry = true;
continue;
}
try
{
string line = PGPDecrypt(encoded, pgpKey, password);
lines.Append(line);
}
catch (Exception ex)
{
WinAuthForm.ErrorDialog(parent, strings.InvalidPassword, ex.InnerException, MessageBoxButtons.OK);
pgpKey = null;
password = null;
retry = true;
continue;
}
}
else // read a plain text file
{
lines.Append(File.ReadAllText(file));
}
} while (retry);
int linenumber = 0;
try
{
using (var sr = new StringReader(lines.ToString()))
{
string line;
while ((line = sr.ReadLine()) != null)
{
linenumber++;
// ignore blank lines or comments
line = line.Trim();
if (line.Length == 0 || line.IndexOf("#") == 0)
{
continue;
}
// parse and validate URI
var uri = new Uri(line);
// we only support "otpauth"
if (uri.Scheme != "otpauth")
{
throw new ApplicationException("Import only supports otpauth://");
}
// we only support totp (not hotp)
if (uri.Host != "totp" && uri.Host != "hotp")
{
throw new ApplicationException("Import only supports otpauth://totp/ or otpauth://hotp/");
}
// get the label and optional issuer
string issuer = string.Empty;
string label = (string.IsNullOrEmpty(uri.LocalPath) == false ? uri.LocalPath.Substring(1) : string.Empty); // skip past initial /
int p = label.IndexOf(":");
if (p != -1)
{
issuer = label.Substring(0, p);
label = label.Substring(p + 1);
}
// + aren't decoded
label = label.Replace("+", " ");
var query = HttpUtility.ParseQueryString(uri.Query);
string secret = query["secret"];
if (string.IsNullOrEmpty(secret) == true)
{
throw new ApplicationException("Authenticator does not contain secret");
}
string counter = query["counter"];
if (uri.Host == "hotp" && string.IsNullOrEmpty(counter) == true)
{
throw new ApplicationException("HOTP authenticator should have a counter");
}
WinAuthAuthenticator importedAuthenticator = new WinAuthAuthenticator();
importedAuthenticator.AutoRefresh = false;
//
Authenticator auth;
if (string.Compare(issuer, "BattleNet", true) == 0)
{
string serial = query["serial"];
if (string.IsNullOrEmpty(serial) == true)
{
throw new ApplicationException("Battle.net Authenticator does not have a serial");
}
serial = serial.ToUpper();
if (Regex.IsMatch(serial, @"^[A-Z]{2}-?[\d]{4}-?[\d]{4}-?[\d]{4}$") == false)
{
throw new ApplicationException("Invalid serial for Battle.net Authenticator");
}
auth = new BattleNetAuthenticator();
//char[] decoded = Base32.getInstance().Decode(secret).Select(c => Convert.ToChar(c)).ToArray(); // this is hex string values
//string hex = new string(decoded);
//((BattleNetAuthenticator)auth).SecretKey = Authenticator.StringToByteArray(hex);
((BattleNetAuthenticator)auth).SecretKey = Base32.getInstance().Decode(secret);
((BattleNetAuthenticator)auth).Serial = serial;
issuer = string.Empty;
}
else if (string.Compare(issuer, "Steam", true) == 0)
{
auth = new SteamAuthenticator();
((SteamAuthenticator)auth).SecretKey = Base32.getInstance().Decode(secret);
((SteamAuthenticator)auth).Serial = string.Empty;
((SteamAuthenticator)auth).DeviceId = string.Empty;
((SteamAuthenticator)auth).RevocationCode = string.Empty;
issuer = string.Empty;
}
else if (uri.Host == "hotp")
{
auth = new HOTPAuthenticator();
((HOTPAuthenticator)auth).SecretKey = Base32.getInstance().Decode(secret);
((HOTPAuthenticator)auth).Counter = int.Parse(counter);
if (string.IsNullOrEmpty(issuer) == false)
{
auth.Issuer = issuer;
}
}
else // if (string.Compare(issuer, "Google", true) == 0)
{
auth = new GoogleAuthenticator();
((GoogleAuthenticator)auth).Enroll(secret);
if (string.Compare(issuer, "Google", true) == 0)
{
issuer = string.Empty;
}
else if (string.IsNullOrEmpty(issuer) == false)
{
auth.Issuer = issuer;
}
}
//
int digits = 0;
int.TryParse(query["digits"], out digits);
if (digits != 0)
{
auth.CodeDigits = digits;
}
//
if (label.Length != 0)
{
importedAuthenticator.Name = (issuer.Length != 0 ? issuer + " (" + label + ")" : label);
}
else if (issuer.Length != 0)
{
importedAuthenticator.Name = issuer;
}
else
{
importedAuthenticator.Name = "Imported";
}
//
importedAuthenticator.AuthenticatorData = auth;
// set the icon
string icon = query["icon"];
if (string.IsNullOrEmpty(icon) == false)
{
if (icon.StartsWith("base64:") == true)
{
string b64 = Convert.ToBase64String(Base32.getInstance().Decode(icon.Substring(7)));
importedAuthenticator.Skin = "base64:" + b64;
}
else
{
importedAuthenticator.Skin = icon + "Icon.png";
}
}
// sync
importedAuthenticator.Sync();
authenticators.Add(importedAuthenticator);
}
}
return authenticators;
}
catch (UriFormatException ex)
{
throw new ImportException(string.Format(strings.ImportInvalidUri, linenumber), ex);
}
catch (Exception ex)
{
throw new ImportException(string.Format(strings.ImportError, linenumber, ex.Message), ex);
}
}
/// <summary>
/// Verify and create the authenticator if needed
/// </summary>
/// <returns>true is successful</returns>
private bool verifyAuthenticator(string privatekey)
{
if (string.IsNullOrEmpty(privatekey) == true)
{
return false;
}
this.Authenticator.Name = nameField.Text;
int digits = (this.Authenticator.AuthenticatorData != null ? this.Authenticator.AuthenticatorData.CodeDigits : GoogleAuthenticator.DEFAULT_CODE_DIGITS);
string authtype = timeBasedRadio.Checked == true ? TOTP : HOTP;
long counter = 0;
// if this is a URL, pull it down
Uri uri;
Match match;
if (Regex.IsMatch(privatekey, "https?://.*") == true && Uri.TryCreate(privatekey, UriKind.Absolute, out uri) == true)
{
try
{
var request = (HttpWebRequest)WebRequest.Create(uri);
request.AllowAutoRedirect = true;
request.Timeout = 20000;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK && response.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase) == true)
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(response.GetResponseStream()))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
}
catch (Exception ex)
{
WinAuthForm.ErrorDialog(this.Owner, "Cannot load QR code image from " + privatekey, ex);
return false;
}
}
else if ((match = Regex.Match(privatekey, @"data:image/([^;]+);base64,(.*)", RegexOptions.IgnoreCase)).Success == true)
{
byte[] imagedata = Convert.FromBase64String(match.Groups[2].Value);
using (MemoryStream ms = new MemoryStream(imagedata))
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(ms))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
else if (IsValidFile(privatekey) == true)
{
// assume this is the image file
using (Bitmap bitmap = (Bitmap)Bitmap.FromFile(privatekey))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = result.Text;
}
}
}
// check for otpauth://, e.g. "otpauth://totp/[email protected]?secret=IHZJDKAEEC774BMUK3GX6SA"
match = Regex.Match(privatekey, @"otpauth://([^/]+)/([^?]+)\?(.*)", RegexOptions.IgnoreCase);
if (match.Success == true)
{
authtype = match.Groups[1].Value.ToLower();
string label = match.Groups[2].Value;
NameValueCollection qs = WinAuthHelper.ParseQueryString(match.Groups[3].Value);
privatekey = qs["secret"] ?? privatekey;
int querydigits;
if (int.TryParse(qs["digits"], out querydigits) && querydigits != 0)
{
digits = querydigits;
}
if (qs["counter"] != null)
{
long.TryParse(qs["counter"], out counter);
}
string issuer = qs["issuer"];
if (string.IsNullOrEmpty(issuer) == false)
{
label = issuer + (string.IsNullOrEmpty(label) == false ? " (" + label + ")" : string.Empty);
}
if (string.IsNullOrEmpty(label) == false)
{
this.Authenticator.Name = this.nameField.Text = label;
}
}
// just get the hex chars
privatekey = Regex.Replace(privatekey, @"[^0-9a-z]", "", RegexOptions.IgnoreCase);
if (privatekey.Length == 0)
{
WinAuthForm.ErrorDialog(this.Owner, "The secret code is not valid");
return false;
}
try
{
Authenticator auth;
if (authtype == TOTP)
{
auth = new GoogleAuthenticator();
((GoogleAuthenticator)auth).Enroll(privatekey);
timer.Enabled = true;
codeProgress.Visible = true;
timeBasedRadio.Checked = true;
}
else if (authtype == HOTP)
{
auth = new HOTPAuthenticator();
if (counterField.Text.Trim().Length != 0)
{
long.TryParse(counterField.Text.Trim(), out counter);
}
((HOTPAuthenticator)auth).Enroll(privatekey, counter); // start with the next code
timer.Enabled = false;
codeProgress.Visible = false;
counterBasedRadio.Checked = true;
}
else
{
WinAuthForm.ErrorDialog(this.Owner, "Only TOTP or HOTP authenticators are supported");
return false;
}
auth.CodeDigits = digits;
this.Authenticator.AuthenticatorData = auth;
codeField.SpaceOut = digits / 2;
string key = Base32.getInstance().Encode(this.Authenticator.AuthenticatorData.SecretKey);
//this.secretCodeField.Text = Regex.Replace(key, ".{3}", "$0 ").Trim();
this.codeField.Text = auth.CurrentCode;
if (!(auth is HOTPAuthenticator) && auth.ServerTimeDiff == 0L && SyncErrorWarned == false)
{
SyncErrorWarned = true;
MessageBox.Show(this, string.Format(strings.AuthenticatorSyncError, "Google"), WinAuthMain.APPLICATION_TITLE, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
catch (Exception irre)
{
WinAuthForm.ErrorDialog(this.Owner, "Unable to create the authenticator. The secret code is probably invalid.", irre);
return false;
}
return true;
}
/// <summary>
/// Verify and create the authenticator if needed
/// </summary>
/// <returns>true is successful</returns>
private bool verifyAuthenticator(string privatekey)
{
if (string.IsNullOrEmpty(privatekey) == true)
{
return(false);
}
this.Authenticator.Name = nameField.Text;
int digits = (this.Authenticator.AuthenticatorData != null ? this.Authenticator.AuthenticatorData.CodeDigits : GoogleAuthenticator.DEFAULT_CODE_DIGITS);
string authtype = timeBasedRadio.Checked == true ? TOTP : HOTP;
long counter = 0;
// if this is a URL, pull it down
Uri uri;
Match match;
if (Regex.IsMatch(privatekey, "https?://.*") == true && Uri.TryCreate(privatekey, UriKind.Absolute, out uri) == true)
{
try
{
var request = (HttpWebRequest)WebRequest.Create(uri);
request.AllowAutoRedirect = true;
request.Timeout = 20000;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK && response.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase) == true)
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(response.GetResponseStream()))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
}
catch (Exception ex)
{
WinAuthForm.ErrorDialog(this.Owner, "Cannot load QR code image from " + privatekey, ex);
return(false);
}
}
else if ((match = Regex.Match(privatekey, @"data:image/([^;]+);base64,(.*)", RegexOptions.IgnoreCase)).Success == true)
{
byte[] imagedata = Convert.FromBase64String(match.Groups[2].Value);
using (MemoryStream ms = new MemoryStream(imagedata))
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(ms))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
else if (IsValidFile(privatekey) == true)
{
// assume this is the image file
using (Bitmap bitmap = (Bitmap)Bitmap.FromFile(privatekey))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = result.Text;
}
}
}
string issuer = null;
string serial = null;
// check for otpauth://, e.g. "otpauth://totp/[email protected]?secret=IHZJDKAEEC774BMUK3GX6SA"
match = Regex.Match(privatekey, @"otpauth://([^/]+)/([^?]+)\?(.*)", RegexOptions.IgnoreCase);
if (match.Success == true)
{
authtype = match.Groups[1].Value.ToLower();
string label = match.Groups[2].Value;
int p = label.IndexOf(":");
if (p != -1)
{
issuer = label.Substring(0, p);
label = label.Substring(p + 1);
}
NameValueCollection qs = WinAuthHelper.ParseQueryString(match.Groups[3].Value);
privatekey = qs["secret"] ?? privatekey;
int querydigits;
if (int.TryParse(qs["digits"], out querydigits) && querydigits != 0)
{
digits = querydigits;
}
if (qs["counter"] != null)
{
long.TryParse(qs["counter"], out counter);
}
issuer = qs["issuer"];
if (string.IsNullOrEmpty(issuer) == false)
{
label = issuer + (string.IsNullOrEmpty(label) == false ? " (" + label + ")" : string.Empty);
}
serial = qs["serial"];
if (string.IsNullOrEmpty(label) == false)
{
this.Authenticator.Name = this.nameField.Text = label;
}
}
// just get the hex chars
privatekey = Regex.Replace(privatekey, @"[^0-9a-z]", "", RegexOptions.IgnoreCase);
if (privatekey.Length == 0)
{
WinAuthForm.ErrorDialog(this.Owner, "The secret code is not valid");
return(false);
}
try
{
Authenticator auth;
if (authtype == TOTP)
{
if (string.Compare(issuer, "BattleNet", true) == 0)
{
if (string.IsNullOrEmpty(serial) == true)
{
throw new ApplicationException("Battle.net Authenticator does not have a serial");
}
serial = serial.ToUpper();
if (Regex.IsMatch(serial, @"^[A-Z]{2}-?[\d]{4}-?[\d]{4}-?[\d]{4}$") == false)
{
throw new ApplicationException("Invalid serial for Battle.net Authenticator");
}
auth = new BattleNetAuthenticator();
((BattleNetAuthenticator)auth).SecretKey = Base32.getInstance().Decode(privatekey);
((BattleNetAuthenticator)auth).Serial = serial;
issuer = string.Empty;
}
else if (issuer == "Steam")
{
auth = new SteamAuthenticator();
((SteamAuthenticator)auth).SecretKey = Base32.getInstance().Decode(privatekey);
((SteamAuthenticator)auth).Serial = string.Empty;
((SteamAuthenticator)auth).DeviceId = string.Empty;
((SteamAuthenticator)auth).RevocationCode = string.Empty;
this.Authenticator.Skin = null;
issuer = string.Empty;
}
else
{
auth = new GoogleAuthenticator();
((GoogleAuthenticator)auth).Enroll(privatekey);
}
timer.Enabled = true;
codeProgress.Visible = true;
timeBasedRadio.Checked = true;
}
else if (authtype == HOTP)
{
auth = new HOTPAuthenticator();
if (counterField.Text.Trim().Length != 0)
{
long.TryParse(counterField.Text.Trim(), out counter);
}
((HOTPAuthenticator)auth).Enroll(privatekey, counter); // start with the next code
timer.Enabled = false;
codeProgress.Visible = false;
counterBasedRadio.Checked = true;
}
else
{
WinAuthForm.ErrorDialog(this.Owner, "Only TOTP or HOTP authenticators are supported");
return(false);
}
auth.CodeDigits = digits;
this.Authenticator.AuthenticatorData = auth;
if (digits > 5)
{
codeField.SpaceOut = digits / 2;
}
else
{
codeField.SpaceOut = 0;
}
//string key = Base32.getInstance().Encode(this.Authenticator.AuthenticatorData.SecretKey);
this.codeField.Text = auth.CurrentCode;
if (!(auth is HOTPAuthenticator) && auth.ServerTimeDiff == 0L && SyncErrorWarned == false)
{
SyncErrorWarned = true;
MessageBox.Show(this, string.Format(strings.AuthenticatorSyncError, "Google"), WinAuthMain.APPLICATION_TITLE, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
catch (Exception irre)
{
WinAuthForm.ErrorDialog(this.Owner, "Unable to create the authenticator. The secret code is probably invalid.", irre);
return(false);
}
return(true);
}
/// <summary>
/// Verify and create the authenticator if needed
/// </summary>
/// <returns>true is successful</returns>
private bool verifyAuthenticator(string privatekey)
{
if (string.IsNullOrEmpty(privatekey) == true)
{
return false;
}
this.Authenticator.Name = nameField.Text;
string authtype = "totp";
// if this is a URL, pull it down
Uri uri;
Match match;
if (Regex.IsMatch(privatekey, "https?://.*") == true && Uri.TryCreate(privatekey, UriKind.Absolute, out uri) == true)
{
try
{
var request = (HttpWebRequest)WebRequest.Create(uri);
request.AllowAutoRedirect = true;
request.Timeout = 20000;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK && response.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase) == true)
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(response.GetResponseStream()))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
}
catch (Exception ex)
{
WinAuthForm.ErrorDialog(this.Owner, "Cannot load QR code image from " + privatekey, ex);
return false;
}
}
else if ((match = Regex.Match(privatekey, @"data:image/([^;]+);base64,(.*)", RegexOptions.IgnoreCase)).Success == true)
{
byte[] imagedata = Convert.FromBase64String(match.Groups[2].Value);
using (MemoryStream ms = new MemoryStream(imagedata))
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(ms))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
else if (IsValidFile(privatekey) == true)
{
// assume this is the image file
using (Bitmap bitmap = (Bitmap)Bitmap.FromFile(privatekey))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = result.Text;
}
}
}
// check for otpauth://, e.g. "otpauth://totp/[email protected]?secret=IHZJDKAEEC774BMUK3GX6SA"
match = Regex.Match(privatekey, @"otpauth://([^/]+)/([^?]+)\?(.*)", RegexOptions.IgnoreCase);
if (match.Success == true)
{
authtype = match.Groups[1].Value; // @todo we only handle totp (not hotp)
if (string.Compare(authtype, "totp", true) != 0)
{
WinAuthForm.ErrorDialog(this.Owner, "Only time-based (TOTP) authenticators are supported when adding a Google Authenticator. Use the general \"Add Authenticator\" for counter-based (HOTP) authenticators.");
return false;
}
string label = match.Groups[2].Value;
if (string.IsNullOrEmpty(label) == false)
{
this.Authenticator.Name = this.nameField.Text = label;
}
NameValueCollection qs = WinAuthHelper.ParseQueryString(match.Groups[3].Value);
privatekey = qs["secret"] ?? privatekey;
}
// just get the hex chars
privatekey = Regex.Replace(privatekey, @"[^0-9a-z]", "", RegexOptions.IgnoreCase);
if (privatekey.Length == 0)
{
WinAuthForm.ErrorDialog(this.Owner, "The secret code is not valid");
return false;
}
try
{
GoogleAuthenticator auth = new GoogleAuthenticator();
auth.Enroll(privatekey);
this.Authenticator.AuthenticatorData = auth;
codeProgress.Visible = true;
string key = Base32.getInstance().Encode(this.Authenticator.AuthenticatorData.SecretKey);
this.secretCodeField.Text = Regex.Replace(key, ".{3}", "$0 ").Trim();
this.codeField.Text = auth.CurrentCode;
if (auth.ServerTimeDiff == 0L && SyncErrorWarned == false)
{
SyncErrorWarned = true;
MessageBox.Show(this, string.Format(strings.AuthenticatorSyncError, "Google"), WinAuthMain.APPLICATION_TITLE, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
catch (Exception irre)
{
WinAuthForm.ErrorDialog(this.Owner, "Unable to create the authenticator. The secret code is probably invalid.", irre);
return false;
}
return true;
}
/// <summary>
/// Verify and create the authenticator if needed
/// </summary>
/// <returns>true is successful</returns>
private bool verifyAuthenticator(string privatekey)
{
if (string.IsNullOrEmpty(privatekey) == true)
{
return(false);
}
this.Authenticator.Name = nameField.Text;
string authtype = "totp";
// if this is a URL, pull it down
Uri uri;
Match match;
if (Regex.IsMatch(privatekey, "https?://.*") == true && Uri.TryCreate(privatekey, UriKind.Absolute, out uri) == true)
{
try
{
var request = (HttpWebRequest)WebRequest.Create(uri);
request.AllowAutoRedirect = true;
request.Timeout = 20000;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK && response.ContentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase) == true)
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(response.GetResponseStream()))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
}
catch (Exception ex)
{
WinAuthForm.ErrorDialog(this.Owner, "无法从中加载QR码图像" + privatekey, ex);
return(false);
}
}
else if ((match = Regex.Match(privatekey, @"data:image/([^;]+);base64,(.*)", RegexOptions.IgnoreCase)).Success == true)
{
byte[] imagedata = Convert.FromBase64String(match.Groups[2].Value);
using (MemoryStream ms = new MemoryStream(imagedata))
{
using (Bitmap bitmap = (Bitmap)Bitmap.FromStream(ms))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = HttpUtility.UrlDecode(result.Text);
}
}
}
}
else if (IsValidFile(privatekey) == true)
{
// assume this is the image file
using (Bitmap bitmap = (Bitmap)Bitmap.FromFile(privatekey))
{
IBarcodeReader reader = new BarcodeReader();
var result = reader.Decode(bitmap);
if (result != null)
{
privatekey = result.Text;
}
}
}
// check for otpauth://, e.g. "otpauth://totp/[email protected]?secret=IHZJDKAEEC774BMUK3GX6SA"
match = Regex.Match(privatekey, @"otpauth://([^/]+)/([^?]+)\?(.*)", RegexOptions.IgnoreCase);
if (match.Success == true)
{
authtype = match.Groups[1].Value; // @todo we only handle totp (not hotp)
if (string.Compare(authtype, "totp", true) != 0)
{
WinAuthForm.ErrorDialog(this.Owner, "添加Google Authenticator时，仅支持基于时间的（TOTP）验证器。使用普通 \"添加身份验证器\" 进行计数器（Hotp）验证器。");
return(false);
}
string label = match.Groups[2].Value;
if (string.IsNullOrEmpty(label) == false)
{
this.Authenticator.Name = this.nameField.Text = label;
}
NameValueCollection qs = WinAuthHelper.ParseQueryString(match.Groups[3].Value);
privatekey = qs["secret"] ?? privatekey;
}
// just get the hex chars
privatekey = Regex.Replace(privatekey, @"[^0-9a-z]", "", RegexOptions.IgnoreCase);
if (privatekey.Length == 0)
{
WinAuthForm.ErrorDialog(this.Owner, "密钥无效");
return(false);
}
try
{
GoogleAuthenticator auth = new GoogleAuthenticator();
auth.Enroll(privatekey);
this.Authenticator.AuthenticatorData = auth;
codeProgress.Visible = true;
string key = Base32.getInstance().Encode(this.Authenticator.AuthenticatorData.SecretKey);
this.secretCodeField.Text = Regex.Replace(key, ".{3}", "$0 ").Trim();
this.codeField.Text = auth.CurrentCode;
if (auth.ServerTimeDiff == 0L && SyncErrorWarned == false)
{
SyncErrorWarned = true;
MessageBox.Show(this, string.Format(strings.AuthenticatorSyncError, "Google"), WinAuthMain.APPLICATION_TITLE, MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
catch (Exception irre)
{
WinAuthForm.ErrorDialog(this.Owner, "无法创建验证器。密钥可能无效。", irre);
return(false);
}
return(true);
}
