internal static IntPtr CreateAuthData(SecurityWinntAuthIdentity authIndentity)
{
IntPtr pAuthData = Marshal.AllocHGlobal(Marshal.SizeOf(authIndentity));
Marshal.StructureToPtr(authIndentity, pAuthData, false);
return pAuthData;
}
internal static void FreeSecurityWinntAuthIdentity(SecurityWinntAuthIdentity authIdentity)
{
if (authIdentity.User != IntPtr.Zero)
{
Marshal.FreeHGlobal(authIdentity.User);
authIdentity.User = IntPtr.Zero;
}
if (authIdentity.Domain != IntPtr.Zero)
{
Marshal.FreeHGlobal(authIdentity.Domain);
authIdentity.Domain = IntPtr.Zero;
}
if (authIdentity.Password != IntPtr.Zero)
{
Marshal.FreeHGlobal(authIdentity.Password);
authIdentity.Password = IntPtr.Zero;
}
}
internal static void AcquireCredentialsHandle(
SecurityPackageType packageType,
AccountCredential accountCredential,
string serverPrincipal,
uint fCredentialUse,
out SecurityHandle credentialHandle)
{
string stringPackage = SspiUtility.GetPackageStringName(packageType);
SecurityInteger expiryTime;
SecurityWinntAuthIdentity authIdentity = new SecurityWinntAuthIdentity(accountCredential);
IntPtr pAuthData = IntPtr.Zero;
SchannelCred schannelCred = new SchannelCred();
schannelCred.dwVersion = NativeMethods.SCHANNEL_CRED_VERSION;
schannelCred.cCreds = 0;
schannelCred.paCred = IntPtr.Zero;
CredSspCred credSsp = new CredSspCred();
switch (packageType)
{
case SecurityPackageType.Ntlm:
case SecurityPackageType.Kerberos:
case SecurityPackageType.Negotiate:
pAuthData = SspiUtility.CreateAuthData(authIdentity);
break;
case SecurityPackageType.Schannel:
pAuthData = SspiUtility.CreateAuthData(schannelCred);
break;
case SecurityPackageType.CredSsp:
credSsp.Type = CredSspSubmitType.CredsspSubmitBufferBoth;
credSsp.pSchannelCred = CreateAuthData(schannelCred);
credSsp.pSpnegoCred = CreateAuthData(authIdentity);
pAuthData = CreateAuthData(credSsp);
break;
//default, if other values, exception will be thrown by GetPackageStringName.
default:
throw new ArgumentException("Invlid packageType value.", "packageType");
}
uint result = NativeMethods.AcquireCredentialsHandle(
serverPrincipal,
stringPackage,
fCredentialUse,
IntPtr.Zero,
pAuthData,
IntPtr.Zero,
IntPtr.Zero,
out credentialHandle,
out expiryTime);
//Free memory
switch (packageType)
{
case SecurityPackageType.Ntlm:
case SecurityPackageType.Kerberos:
case SecurityPackageType.Negotiate:
SspiUtility.FreeSecurityWinntAuthIdentity(authIdentity);
break;
case SecurityPackageType.Schannel:
stringPackage = Schannel;
SspiUtility.FreeSchannelCred(schannelCred);
break;
case SecurityPackageType.CredSsp:
SspiUtility.FreeSecurityWinntAuthIdentity(authIdentity);
SspiUtility.FreeSchannelCred(schannelCred);
SspiUtility.FreeCredSspCred(credSsp);
break;
//default, if other values, exception will be thrown by GetPackageStringName.
default:
throw new ArgumentException("Invlid packageType value.", "packageType");
}
Marshal.FreeHGlobal(pAuthData);
if (result != NativeMethods.SEC_E_OK)
{
throw new SspiException("AquireCredentialsHandle failed", result);
}
}
