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CredMarshalCredential (advapi32)
.
C# Signature:
[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError=true)]
static extern bool CredMarshalCredential(int credType,
IntPtr credential,
// we need to get this as a pointer because we'll have
// to release it later on calling CredFree().
out IntPtr marshaledCredential);
VB Signature:
Declare Function CredMarshalCredential Lib "advapi32.dll" (TODO) As TODO
User-Defined Types:
[StructLayout(LayoutKind.Sequential)]
internal struct CERT_CREDENTIAL_INFO
{
public uint cbSize;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
public byte[] rgbHashOfCert;
}
internal static int CertCredential = 1;
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
None.
Tips & Tricks:
One needs to free the string returned in the "out IntPtr marshaledCredential" parameter!
Sample Code:
NativeMethods.CERT_CREDENTIAL_INFO certInfo =
new NativeMethods.CERT_CREDENTIAL_INFO();
certInfo.cbSize = (uint)Marshal.SizeOf(typeof(NativeMethods.CERT_CREDENTIAL_INFO));
// certCredential.Certificate is an instance of the X509Certificate2 class.
certInfo.rgbHashOfCert = certCredential.Certificate.GetCertHash();
IntPtr marshaledCredential = IntPtr.Zero;
bool result =
NativeMethods.CredMarshalCredential(NativeMethods.CertCredential,
pCertInfo,
out marshaledCredential);
if (result)
{
// we need to do this here, before we free marshaledCredential
domainName = String.Empty;
userName = Marshal.PtrToStringUni(marshaledCredential);
password = certCredential.CardPin;
}
Marshal.FreeHGlobal(pCertInfo);
if (marshaledCredential != IntPtr.Zero)
NativeMethods.CredFree(marshaledCredential);
The LogonUserEx function attempts to log a user on to the local computer. The local computer is the computer from which LogonUserEx was called. You cannot use LogonUserEx to log on to a remote computer. You specify the user with a user name and domain, and authenticate the user with a plaintext password. If the function succeeds, you receive a handle to a token that represents the logged-on user. You can then use this token handle to impersonate the specified user or, in most cases, to create a process that runs in the context of the specified user.
11/24/2010 12:30:59 PM - -95.223.169.177
An IntPtr is a pointer to a memory location (unmanaged) that adapts to the platform it is running on (64-bit, etc.) UNLIKE a standard int/Integer. You should always use this type for unmanaged calls that require it, even though an int will appear to work on your development machine.
1/13/2008 4:00:13 AM - Damon Carr-72.43.165.29
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