public NetworkCredential ToNetworkCredential()
{
if (!string.IsNullOrEmpty(UserName))
{
var userBuilder = new StringBuilder(UserName.Length + 2);
var domainBuilder = new StringBuilder(UserName.Length + 2);
var returnCode = NativeCode.CredUIParseUserName(UserName, userBuilder, userBuilder.Capacity, domainBuilder, domainBuilder.Capacity);
var lastError = Marshal.GetLastWin32Error();
//assuming invalid account name to be not meeting condition for CredUIParseUserName
//"The name must be in UPN or down-level format, or a certificate"
if (returnCode == NativeCode.CredentialUIReturnCodes.InvalidAccountName)
{
userBuilder.Append(UserName);
}
else if (returnCode != 0)
{
throw new CredentialAPIException($"Unable to Parse UserName", "CredUIParseUserName", lastError);
}
return(new NetworkCredential(userBuilder.ToString(), this.CredentialBlob, domainBuilder.ToString()));
}
else
{
return(new NetworkCredential(UserName, this.CredentialBlob));
}
}
/// <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)
{
IntPtr nCredPtr;
var username = String.Empty;
var passwd = String.Empty;
var domain = String.Empty;
// Make the API call using the P/Invoke signature
bool ret = NativeCode.CredRead(Target, (NativeCode.CredentialType)type, 0, out nCredPtr);
int lastError = Marshal.GetLastWin32Error();
if (!ret)
{
throw new Win32Exception(lastError, "CredDelete throw an error");
}
// If the API was successful then...
if (ret)
{
try
{
using (CriticalCredentialHandle critCred = new CriticalCredentialHandle(nCredPtr))
{
Credential cred = critCred.GetCredential();
passwd = cred.CredentialBlob;
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();
//assuming invalid account name to be not meeting condition for CredUIParseUserName
//"The name must be in UPN or down-level format, or a certificate"
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);
}
}
return(null);
}
/// <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>
/// <param name="type">Credential type</param>
/// <returns>return the credentials if success, null if target not found, throw if failed to read stored credentials</returns>
public static NetworkCredential GetCredentials(string target, CredentialType type = CredentialType.Generic)
{
IntPtr nCredPtr;
var username = String.Empty;
var passwd = String.Empty;
var domain = String.Empty;
// Make the API call using the P/Invoke signature
bool isSuccess = NativeCode.CredRead(target, (NativeCode.CredentialType)type, 0, out nCredPtr);
if (!isSuccess)
{
var lastError = Marshal.GetLastWin32Error();
if (lastError == (int)NativeCode.CredentialUIReturnCodes.NotFound)
{
return(null);
}
throw new Win32Exception(lastError,
String.Format("'CredRead' call throw an error (Error code: {0})", lastError));
}
try
{
using (var critCred = new CriticalCredentialHandle(nCredPtr))
{
Credential cred = critCred.GetCredential();
passwd = cred.CredentialBlob;
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 returnCode = NativeCode.CredUIParseUserName(user, userBuilder, userBuilder.Capacity, domainBuilder, domainBuilder.Capacity);
var lastError = Marshal.GetLastWin32Error();
//assuming invalid account name to be not meeting condition for CredUIParseUserName
//"The name must be in UPN or down-level format, or a certificate"
if (returnCode == NativeCode.CredentialUIReturnCodes.InvalidAccountName)
{
userBuilder.Append(user);
}
else if (returnCode != 0)
{
throw new Win32Exception(lastError, String.Format("CredUIParseUserName throw an error (Error code: {0})", lastError));
}
username = userBuilder.ToString();
domain = domainBuilder.ToString();
}
return(new NetworkCredential(username, passwd, domain));
}
}
catch (Exception)
{
return(null);
}
}
internal static bool ParseUserName(string usernameBuf, int maxUserName, int maxDomain, out string user, out string domain)
{
var userBuilder = new StringBuilder(maxUserName);
var domainBuilder = new StringBuilder(maxDomain);
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));
}
internal static NetworkCredential ToNetworkCredential(this Credential cred)
{
if (cred == null)
{
return(null);
}
string username = string.Empty;
string domain = string.Empty;
var passwd = cred.CredentialBlob;
if (!string.IsNullOrEmpty(cred.UserName))
{
var user = cred.UserName;
var userBuilder = new StringBuilder(cred.UserName.Length + 2);
var domainBuilder = new StringBuilder(cred.UserName.Length + 2);
var returnCode = NativeCode.CredUIParseUserName(user, userBuilder, userBuilder.Capacity, domainBuilder, domainBuilder.Capacity);
var lastError = Marshal.GetLastWin32Error();
//assuming invalid account name to be not meeting condition for CredUIParseUserName
//"The name must be in UPN or down-level format, or a certificate"
if (returnCode == NativeCode.CredentialUIReturnCodes.InvalidAccountName)
{
userBuilder.Append(user);
}
else if (returnCode != 0)
{
throw new Win32Exception(lastError, String.Format("CredUIParseUserName throw an error (Error code: {0})", lastError));
}
username = userBuilder.ToString();
domain = domainBuilder.ToString();
}
return(new NetworkCredential(username, passwd, domain));
}
