void getCredentails()
{
try
{
if (!string.IsNullOrEmpty(encryptedData))
{
var xml = PasswordHepler.GetFullString(encryptedData, Id, emgName);
if (!string.IsNullOrEmpty(xml))
{
//read the xml
if (!xml.EndsWith("/>"))
{
xml = xml.Substring(0, xml.IndexOf("/>") + 2);
}
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(new System.IO.StringReader(xml));
XPathNavigator xmlNav = xmlDoc.CreateNavigator();
xmlNav.MoveToFirstChild();
xmlNav.MoveToFirstAttribute();
do
{
if (xmlNav.Name == "Username")
{
UserName = xmlNav.Value;
txtUsername.Text = UserName;
}
if (xmlNav.Name == "Domain")
{
Domain = xmlNav.Value;
cbDomain.Text = Domain;
}
if (xmlNav.Name == "Password")
{
if (Password == null)
{
Password = new SecureString();
}
foreach (char c in xmlNav.Value)
{
Password.AppendChar(c);
}
pbPassword.Password = xmlNav.Value;
}
} while (xmlNav.MoveToNextAttribute());
}
}
}
catch { }
}
/// <summary>
/// Sets or Clears the internal secure string used for the password.
/// If an Empty String is passed ("") the secure password is cleared. If a none-zero length string is passed then the password is set.
/// The Password will only be used by a process if the User Name and Domain is specified and it is not an Empty or null string (i.e.,Length > 0)
/// it is recommend that the working directory also be specified else the working directory will be %SYSTEMROOT%\system32
/// </summary>
/// <remarks>https://msdn.microsoft.com/en-us/library/system.diagnostics.processstartinfo.password(v=vs.110).aspx</remarks>
/// <param name="pwd">Process Password</param>
/// <returns>true if password is set or cleared otherwise false</returns>
/// <seealso cref="System.Diagnostics.ProcessStartInfo.Password"/>
/// <seealso cref="System.Security.SecureString"/>
public Boolean SetPassword(string pwd)
{
try
{
if (pwd == String.Empty && Password.Length > 0)
{
Password.Clear();
return(true);
}
else if (pwd.Length > 0)
{
if (Password.Length > 0)
{
Password.Clear();
}
for (int i = 0; i < pwd.Length; i++)
{
Password.AppendChar(pwd.ElementAt <char>(i));
}
return(true);
}
}
catch (CryptographicException ex)
{
SetLastError(string.Format("Crytopgraphic Exception: {0}", ex.Message), ex.InnerException);
}
catch (InvalidOperationException ex)
{
SetLastError(string.Format("Secure String is Read Only: {0}", ex.Message));
}
catch (ArgumentOutOfRangeException ex)
{
SetLastError(string.Format("String is too long (i.e., > 65,536 characters): {0}", ex.Message));
}
catch (Exception ex)
{
SetLastError(ex.Message, ex.InnerException);
}
return(false);
}
public DialogResult ShowDialog(IWin32Window owner)
{
if (String.IsNullOrEmpty(_targetName))
{
throw new ArgumentNullException("TargetName");
}
DialogResult result;
int passwordMaxLength = CREDUI_MAX_PASSWORD_LENGTH + 1;
StringBuilder username = new StringBuilder(_userName, CREDUI_MAX_USERNAME_LENGTH);
SafeBitmapHandle banner = _banner != null ? new SafeBitmapHandle(_banner.GetHbitmap(), true) : new SafeBitmapHandle(IntPtr.Zero, false);
SafeUnmanagedBuffer password = new SafeUnmanagedBuffer(passwordMaxLength * sizeof(char));
for (int i = 0; i < sizeof(char); i++)
{
password[i] = 0;
}
CheckNotDisposed();
var info = new NativeMethods.CREDUI_INFO()
{
hwndParent = owner != null ? owner.Handle : IntPtr.Zero,
hbmBanner = banner.DangerousGetHandle(),
pszCaptionText = _caption,
pszMessageText = _message
};
info.cbSize = Marshal.SizeOf(info);
try
{
var nativeResult = NativeMethods.CredUIPromptForCredentials(ref info, _targetName, IntPtr.Zero, 0,
username, CRED_MAX_USERNAME_LENGTH,
new HandleRef(password, password.DangerousGetHandle()), passwordMaxLength,
ref _saveChecked, _options);
/*IntPtr outBuffer;
* uint authPackage = 0;
* uint outBufferSize;
* info.hbmBanner = IntPtr.Zero;
* nativeResult = NativeMethods.CredUIPromptForWindowsCredentials(ref info, 0, ref authPackage, new HandleRef(null, IntPtr.Zero), 0, out outBuffer, out outBufferSize, ref _saveChecked,
* 0x1 | 0x200);
*
* int nameLen = 0, passLen = 0, dNameLength = 0;
* NativeMethods.CredUnPackAuthenticationBuffer(0, outBuffer, (int)outBufferSize, null, ref nameLen, null, ref dNameLength, null, ref passLen);
* StringBuilder sName = new StringBuilder(nameLen), sPass = new StringBuilder(passLen), dName = new StringBuilder(dNameLength);
* bool pos = NativeMethods.CredUnPackAuthenticationBuffer(0, outBuffer, (int)outBufferSize, sName, ref nameLen,
* dName, ref dNameLength, sPass, ref passLen);
*
*
* var b = new SafeCoUnmanagedBuffer(outBuffer, checked((int)outBufferSize), true);
*
* string s = Marshal.PtrToStringUni(outBuffer);*/
switch (nativeResult)
{
case NativeMethods.CredUIReturnCodes.NO_ERROR:
_userName = username.ToString();
Password.Clear();
byte[] unicodeBytes = new byte[sizeof(char)];
char currentChar = Char.MaxValue;
for (int i = 0; ;)
{
for (int j = 0; j < sizeof(char); j++)
{
unicodeBytes[j] = password[i];
password[i++] = 0;
}
if ((currentChar = Encoding.Unicode.GetChars(unicodeBytes)[0]) != '\0')
{
Password.AppendChar(currentChar);
}
else
{
break;
}
}
result = DialogResult.OK;
break;
case NativeMethods.CredUIReturnCodes.ERROR_CANCELLED:
result = DialogResult.Cancel;
break;
default:
throw new Win32Exception((int)nativeResult);
}
}
finally
{
banner.Dispose();
password.Dispose();
}
return(result);
}
