/// <summary>
/// Extract the stored credential from Windows Credential store
/// </summary>
/// <param name="Target">Name of the application/Url where the credential is used for</param>
/// <returns>null if target not found, else stored credentials</returns>
public static NetworkCredential GetCredentials(string Target, CredentialType type = CredentialType.Generic)
{
Credential cred = new Credential(String.Empty, String.Empty, Target, type);
bool ret = cred.Load();
int lastError = Marshal.GetLastWin32Error();
if (!ret)
{
//throw new Win32Exception(lastError, "CredRead throw an error");
return(null);
}
var username = cred.Username;
var passwd = cred.Password;
var domain = String.Empty;
// Make the API call using the P/Invoke signature
try
{
if (!String.IsNullOrEmpty(cred.Username))
{
var user = cred.Username;
StringBuilder userBuilder = new StringBuilder(cred.Username.Length + 2);
StringBuilder domainBuilder = new StringBuilder(cred.Username.Length + 2);
var ret1 = NativeCode.CredUIParseUserName(user, userBuilder, userBuilder.Capacity, domainBuilder, domainBuilder.Capacity);
lastError = Marshal.GetLastWin32Error();
if (ret1 == NativeCode.CredentialUIReturnCodes.InvalidAccountName)
{
userBuilder.Append(user);
}
else if ((uint)ret1 > 0)
{
throw new Win32Exception(lastError, "CredUIParseUserName throw an error");
}
username = userBuilder.ToString();
domain = domainBuilder.ToString();
}
return(new NetworkCredential(username, passwd, domain));
}
catch (Exception e)
{
return(null);
}
}
private static bool ParseUserName(string usernameBuf, int maxUserName, int maxDomain, out string user, out string domain)
{
StringBuilder userBuilder = new StringBuilder();
StringBuilder domainBuilder = new StringBuilder();
user = String.Empty;
domain = String.Empty;
var returnCode = NativeCode.CredUIParseUserName(usernameBuf, userBuilder, maxUserName, domainBuilder, maxDomain);
Debug.WriteLine(returnCode);
switch (returnCode)
{
case NativeCode.CredentialUIReturnCodes.Success: // The username is valid.
user = userBuilder.ToString();
domain = domainBuilder.ToString();
return(true);
}
return(false);
}
/// <summary>
/// Accepts credentials in a console window
/// </summary>
/// <param name="Target">A descriptive text for where teh credentials being asked are used for</param>
/// <returns>NetworkCredential object containing the user name, </returns>
public static NetworkCredential PromptForCredentialsConsole(string target)
{
var user = String.Empty;
var password = String.Empty;
var domain = String.Empty;
// Setup the flags and variables
StringBuilder userPassword = new StringBuilder(), userID = new StringBuilder();
bool save = true;
NativeCode.CredentialUIFlags flags = NativeCode.CredentialUIFlags.CompleteUsername | NativeCode.CredentialUIFlags.ExcludeCertificates | NativeCode.CredentialUIFlags.GenericCredentials;
// Prompt the user
NativeCode.CredentialUIReturnCodes returnCode = NativeCode.CredUICmdLinePromptForCredentials(target, IntPtr.Zero, 0, userID, 100, userPassword, 100, ref save, flags);
password = userPassword.ToString();
StringBuilder userBuilder = new StringBuilder();
StringBuilder domainBuilder = new StringBuilder();
returnCode = NativeCode.CredUIParseUserName(userID.ToString(), userBuilder, int.MaxValue, domainBuilder, int.MaxValue);
switch (returnCode)
{
case NativeCode.CredentialUIReturnCodes.Success: // The username is valid.
user = userBuilder.ToString();
domain = domainBuilder.ToString();
break;
case NativeCode.CredentialUIReturnCodes.InvalidAccountName: // The username is not valid.
user = userID.ToString();
domain = null;
break;
case NativeCode.CredentialUIReturnCodes.InsufficientBuffer: // One of the buffers is too small.
throw new OutOfMemoryException();
case NativeCode.CredentialUIReturnCodes.InvalidParameter: // ulUserMaxChars or ulDomainMaxChars is zero OR userName, user, or domain is NULL.
throw new ArgumentNullException("userName");
}
return(new NetworkCredential(user, password, domain));
}