public static extern int CredUIPromptForWindowsCredentials(
ref CredentialUiInfo credInfo,
uint authError,
ref uint authPackage,
IntPtr inAuthBuffer,
uint inAuthBufferSize,
out IntPtr outAuthBuffer,
out uint outAuthBufferSize,
ref bool saveCredentials,
CredentialUiWindowsFlags flags);
public static Credential CredentialPrompt(Program program, TargetUri targetUri, string message)
{
if (program is null)
{
throw new ArgumentNullException(nameof(program));
}
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (message is null)
{
throw new ArgumentNullException(nameof(message));
}
var credUiInfo = new CredentialUiInfo
{
BannerArt = IntPtr.Zero,
CaptionText = program.Title,
Parent = program.ParentHwnd,
MessageText = message,
Size = Marshal.SizeOf(typeof(CredentialUiInfo))
};
var flags = CredentialUiWindowsFlags.Generic;
var authPackage = CredentialPackFlags.None;
var packedAuthBufferPtr = IntPtr.Zero;
var inBufferPtr = IntPtr.Zero;
uint packedAuthBufferSize = 0;
bool saveCredentials = false;
int inBufferSize = 0;
string username;
string password;
if (program.ModalPromptDisplayDialog(ref credUiInfo,
ref authPackage,
packedAuthBufferPtr,
packedAuthBufferSize,
inBufferPtr,
inBufferSize,
saveCredentials,
flags,
out username,
out password))
{
return(new Credential(username, password));
}
return(null);
}
public static extern int CredUIPromptForWindowsCredentials(ref CredentialUiInfo credInfo, uint authError, ref CredentialPackFlags authPackage, IntPtr inAuthBuffer, uint inAuthBufferSize, out IntPtr outAuthBuffer, out uint outAuthBufferSize, ref bool saveCredentials, CredentialUiWindowsFlags flags);
public static extern CredentialUiResult CredUIPromptForCredentials(ref CredentialUiInfo credUiInfo, string targetName, IntPtr reserved, uint authError, StringBuilder username, int usernameMaxLen, StringBuilder password, int passwordMaxLen, ref bool saveCredentials, CredentialUiFlags flags);
internal static extern WindowsCredentialPromptReturnCode CredUIPromptForWindowsCredentials (ref CredentialUiInfo uiInfo, int authError, ref int authPackage, IntPtr inAuthBuffer, uint inAuthBufferSize, out IntPtr refOutAuthBuffer, out int refOutAuthBufferSize, ref bool fSave, CredentialsUiWindowsFlags uiWindowsFlags);
internal static extern CredUiReturnCodes CredUIPromptForCredentials (ref CredentialUiInfo uiInfo, string targetName, IntPtr reserved1, int iError, StringBuilder userName, int maxUserName, StringBuilder password, int maxPassword, [MarshalAs (UnmanagedType.Bool)] ref bool pfSave, CredentialsUiFlags windowsFlags);
public static bool DisplayModal(Program program,
ref CredentialUiInfo credUiInfo,
ref CredentialPackFlags authPackage,
IntPtr packedAuthBufferPtr,
uint packedAuthBufferSize,
IntPtr inBufferPtr,
int inBufferSize,
bool saveCredentials,
CredentialUiWindowsFlags flags,
out string username,
out string password)
{
if (program is null)
{
throw new ArgumentNullException(nameof(program));
}
int error;
try
{
// open a standard Windows authentication dialog to acquire username + password credentials
if ((error = CredUIPromptForWindowsCredentials(credInfo: ref credUiInfo,
authError: 0,
authPackage: ref authPackage,
inAuthBuffer: inBufferPtr,
inAuthBufferSize: (uint)inBufferSize,
outAuthBuffer: out packedAuthBufferPtr,
outAuthBufferSize: out packedAuthBufferSize,
saveCredentials: ref saveCredentials,
flags: flags)) != Win32Error.Success)
{
program.Trace.WriteLine($"credential prompt failed ('{Win32Error.GetText(error)}').");
username = null;
password = null;
return(false);
}
// use `StringBuilder` references instead of string so that they can be written to
var usernameBuffer = new StringBuilder(512);
var domainBuffer = new StringBuilder(256);
var passwordBuffer = new StringBuilder(512);
int usernameLen = usernameBuffer.Capacity;
int passwordLen = passwordBuffer.Capacity;
int domainLen = domainBuffer.Capacity;
// unpack the result into locally useful data
if (!CredUnPackAuthenticationBuffer(flags: authPackage,
authBuffer: packedAuthBufferPtr,
authBufferSize: packedAuthBufferSize,
username: usernameBuffer,
maxUsernameLen: ref usernameLen,
domainName: domainBuffer,
maxDomainNameLen: ref domainLen,
password: passwordBuffer,
maxPasswordLen: ref passwordLen))
{
username = null;
password = null;
error = Marshal.GetLastWin32Error();
program.Trace.WriteLine($"failed to unpack buffer ('{Win32Error.GetText(error)}').");
return(false);
}
program.Trace.WriteLine("successfully acquired credentials from user.");
username = usernameBuffer.ToString();
password = passwordBuffer.ToString();
return(true);
}
finally
{
if (packedAuthBufferPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(packedAuthBufferPtr);
}
}
}
public static Credential PasswordPrompt(Program program, TargetUri targetUri, string message, string username)
{
if (program is null)
{
throw new ArgumentNullException(nameof(program));
}
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
if (message is null)
{
throw new ArgumentNullException(nameof(message));
}
if (username is null)
{
throw new ArgumentNullException(nameof(username));
}
var credUiInfo = new CredentialUiInfo
{
BannerArt = IntPtr.Zero,
CaptionText = program.Title,
MessageText = message,
Parent = program.ParentHwnd,
Size = Marshal.SizeOf(typeof(CredentialUiInfo))
};
var flags = CredentialUiWindowsFlags.Generic;
var authPackage = CredentialPackFlags.None;
var packedAuthBufferPtr = IntPtr.Zero;
var inBufferPtr = IntPtr.Zero;
uint packedAuthBufferSize = 0;
bool saveCredentials = false;
int inBufferSize = 0;
string password = null;
try
{
int error;
// Execute with `null` to determine buffer size always returns false when determining
// size, only fail if `inBufferSize` looks bad.
CredPackAuthenticationBuffer(flags: authPackage,
username: username,
password: string.Empty,
packedCredentials: IntPtr.Zero,
packedCredentialsSize: ref inBufferSize);
if (inBufferSize <= 0)
{
error = Marshal.GetLastWin32Error();
program.Trace.WriteLine($"unable to determine credential buffer size ('{Win32Error.GetText(error)}').");
return(null);
}
inBufferPtr = Marshal.AllocHGlobal(inBufferSize);
if (!CredPackAuthenticationBuffer(flags: authPackage,
username: username,
password: string.Empty,
packedCredentials: inBufferPtr,
packedCredentialsSize: ref inBufferSize))
{
error = Marshal.GetLastWin32Error();
program.Trace.WriteLine($"unable to write to credential buffer ('{Win32Error.GetText(error)}').");
return(null);
}
if (program.ModalPromptDisplayDialog(ref credUiInfo,
ref authPackage,
packedAuthBufferPtr,
packedAuthBufferSize,
inBufferPtr,
inBufferSize,
saveCredentials,
flags,
out username,
out password))
{
return(new Credential(username, password));
}
}
finally
{
if (inBufferPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(inBufferPtr);
}
}
return(null);
}
public static extern CredentialUiResult CredUIPromptForCredentials(ref CredentialUiInfo credUiInfo, string targetName, IntPtr reserved, uint authError, StringBuilder username, int usernameMaxLen, StringBuilder password, int passwordMaxLen, ref bool saveCredentials, CredentialUiFlags flags);
internal static extern WindowsCredentialPromptReturnCode CredUIPromptForWindowsCredentials(ref CredentialUiInfo uiInfo,
int authError, ref int authPackage, IntPtr inAuthBuffer, uint inAuthBufferSize,
out IntPtr refOutAuthBuffer, out int refOutAuthBufferSize, ref bool fSave,
CredentialsUiWindowsFlags uiWindowsFlags);
internal static extern CredUiReturnCodes CredUIPromptForCredentials(ref CredentialUiInfo uiInfo, string targetName,
IntPtr reserved1, int iError, StringBuilder userName, int maxUserName, StringBuilder password, int maxPassword,
[MarshalAs(UnmanagedType.Bool)] ref bool pfSave, CredentialsUiFlags windowsFlags);
