在C#中为Windows Vista/7显示身份验证对话框
问题描述:
我想从用户获取网络登录凭据。在C#中为Windows Vista/7显示身份验证对话框
我使用.NET 3.5与C#。 到现在为止我用了CredUIPromptForCredentials
呼叫 (一个非常有用的关于如何使用它的链接,可以发现here)
我的问题是,CredUIPromptForCredentials
API调用显示旧的Windows 2000/XP凭据对话框而不是新Vista/7之一。
我读过msdn,我应该使用CredUIPromptForWindowsCredentials函数。
有人可以发表一个如何使用C#的例子吗? 我还需要能够获得输入的凭据。
答
我设法实现一个为我工作的解决方案。
这里是源代码:
[DllImport("ole32.dll")]
public static extern void CoTaskMemFree(IntPtr ptr);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct CREDUI_INFO
{
public int cbSize;
public IntPtr hwndParent;
public string pszMessageText;
public string pszCaptionText;
public IntPtr hbmBanner;
}
[DllImport("credui.dll", CharSet = CharSet.Auto)]
private static extern bool CredUnPackAuthenticationBuffer(int dwFlags,
IntPtr pAuthBuffer,
uint cbAuthBuffer,
StringBuilder pszUserName,
ref int pcchMaxUserName,
StringBuilder pszDomainName,
ref int pcchMaxDomainame,
StringBuilder pszPassword,
ref int pcchMaxPassword);
[DllImport("credui.dll", CharSet = CharSet.Auto)]
private static extern int CredUIPromptForWindowsCredentials(ref CREDUI_INFO notUsedHere,
int authError,
ref uint authPackage,
IntPtr InAuthBuffer,
uint InAuthBufferSize,
out IntPtr refOutAuthBuffer,
out uint refOutAuthBufferSize,
ref bool fSave,
int flags);
public static void GetCredentialsVistaAndUp(string serverName, out NetworkCredential networkCredential)
{
CREDUI_INFO credui = new CREDUI_INFO();
credui.pszCaptionText = "Please enter the credentails for " + serverName;
credui.pszMessageText = "DisplayedMessage";
credui.cbSize = Marshal.SizeOf(credui);
uint authPackage = 0;
IntPtr outCredBuffer = new IntPtr();
uint outCredSize;
bool save = false;
int result = CredUIPromptForWindowsCredentials(ref credui,
0,
ref authPackage,
IntPtr.Zero,
0,
out outCredBuffer,
out outCredSize,
ref save,
1 /* Generic */);
var usernameBuf = new StringBuilder(100);
var passwordBuf = new StringBuilder(100);
var domainBuf = new StringBuilder(100);
int maxUserName = 100;
int maxDomain = 100;
int maxPassword = 100;
if (result == 0)
{
if (CredUnPackAuthenticationBuffer(0, outCredBuffer, outCredSize, usernameBuf, ref maxUserName,
domainBuf, ref maxDomain, passwordBuf, ref maxPassword))
{
//TODO: ms documentation says we should call this but i can't get it to work
//SecureZeroMem(outCredBuffer, outCredSize);
//clear the memory allocated by CredUIPromptForWindowsCredentials
CoTaskMemFree(outCredBuffer);
networkCredential = new NetworkCredential()
{
UserName = usernameBuf.ToString(),
Password = passwordBuf.ToString(),
Domain = domainBuf.ToString()
};
return;
}
}
networkCredential = null;
}
我还需要制定出细节,如怎样记住被输入等,最后凭证......
但大部分作品。
答
下面是一些代码去extracted from bytes.com post:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
struct _CREDUI_INFO
{
public int cbSize;
public IntPtr hwndParent;
public string pszMessageText;
public string pszCaptionText;
public IntPtr hbmBanner;
}
class Program
{
[DllImport("credui.dll", CharSet=CharSet.Unicode)]
internal static extern uint CredUIPromptForWindowsCredentials(ref
_CREDUI_INFO notUsedHere,
int authError,
ref uint authPackage,
IntPtr InAuthBuffer,
uint InAuthBufferSize,
out IntPtr refOutAuthBuffer,
out uint refOutAuthBufferSize,
ref bool fSave,
int flags);
const int CREDUIWIN_AUTHPACKAGE_ONLY = 0x10;
static void Main()
{
_CREDUI_INFO credui = new _CREDUI_INFO();
credui.cbSize = Marshal.SizeOf(credui);
credui.pszCaptionText = "Testje";
credui.pszMessageText = "Message";
uint authPackage = 0;
IntPtr outCredBuffer;
uint outCredSize;
bool save = false;
uint ret = CredUIPromptForWindowsCredentials(ref credui,
0,
ref authPackage,
IntPtr.Zero,
0,
out outCredBuffer,
out outCredSize,
ref save,
CREDUIWIN_AUTHPACKAGE_ONLY);
if(ret != 0)
{
// failed to load function...
// ...
}
else
{
// extract credentials from the buffer returned, using more
// credui.dll API's .
// ...
}
}
}
+0
我看到这篇文章。问题是我需要提取在对话框中输入的凭证。我认为它需要使用CredUnPackAuthenticationBuffer API调用。 – Rubinsh 2010-11-09 15:04:05
我看到你称为你的函数'GetCredentialsVistaAndUp',这个工作是否也适用于XP或者你没有测试过? – 2013-09-25 09:09:04
@ChrisjanLodewyks - 它不适用于XP。 XP不支持这个对话框。它只能在Vista上使用,就像方法名称提示一样。 – codekaizen 2014-01-10 19:33:36
我不断收到一个0x1F/decimal的神秘返回码。事实证明,我必须为所有设置设置CharSet = CharSet.Unicode,然后它工作得很好。 – 2016-06-09 16:48:37