private void InitializeClient(byte[] serverToken, out byte[] clientToken)
{
clientToken = null;
SECURITY_INTEGER ClientLifeTime = new SECURITY_INTEGER(0);
if (!_bGotClientCredentials)
{
uint returnValue;
if (!UseWindowsCreds)
{
SEC_WINNT_AUTH_IDENTITY ident = new SEC_WINNT_AUTH_IDENTITY();
ident.User = Username;
ident.UserLength = ident.User.Length;
ident.Domain = Domain;
ident.DomainLength = ident.Domain.Length;
ident.Password = Password;
ident.PasswordLength = ident.Password.Length;
ident.Flags = 0x1;
returnValue = AcquireCredentialsHandle(null, "Kerberos", SECPKG_CRED_OUTBOUND,
IntPtr.Zero, ref ident, 0, IntPtr.Zero,
ref _hOutboundCred, ref ClientLifeTime);
}
else
{
returnValue = AcquireCredentialsHandle(null, "Kerberos", SECPKG_CRED_OUTBOUND,
HANDLE.Zero, HANDLE.Zero, 0, HANDLE.Zero,
ref _hOutboundCred, ref ClientLifeTime);
}
if (returnValue != SEC_E_OK)
{
throw new Exception("Couldn't acquire client credentials");
}
_bGotClientCredentials = true;
}
uint ss;
SecBufferDesc ClientToken = new SecBufferDesc(MAX_TOKEN_SIZE);
try
{
uint ContextAttributes;
if (serverToken == null)
{
ss = InitializeSecurityContext(ref _hOutboundCred,
IntPtr.Zero,
_sAccountName, // null string pszTargetName,
STANDARD_CONTEXT_ATTRIBUTES,
0, //int Reserved1,
SECURITY_NETWORK_DREP, //int TargetDataRep
IntPtr.Zero, //Always zero first time around...
0, //int Reserved2,
out _hClientContext, //pHandle CtxtHandle = SecHandle
out ClientToken, //ref SecBufferDesc pOutput, //PSecBufferDesc
out ContextAttributes, //ref int pfContextAttr,
out ClientLifeTime); //ref IntPtr ptsExpiry ); //PTimeStamp
}
else
{
SecBufferDesc ServerToken = new SecBufferDesc(serverToken);
try
{
ss = InitializeSecurityContext(ref _hOutboundCred,
ref _hClientContext,
_sAccountName, // null string pszTargetName,
STANDARD_CONTEXT_ATTRIBUTES,
0, //int Reserved1,
SECURITY_NETWORK_DREP, //int TargetDataRep
ref ServerToken, //Always zero first time around...
0, //int Reserved2,
out _hClientContext, //pHandle CtxtHandle = SecHandle
out ClientToken, //ref SecBufferDesc pOutput, //PSecBufferDesc
out ContextAttributes, //ref int pfContextAttr,
out ClientLifeTime); //ref IntPtr ptsExpiry ); //PTimeStamp
}
finally
{
ServerToken.Dispose();
}
}
if (ss == SEC_E_LOGON_DENIED)
{
throw new Exception("Bad username, password or domain.");
}
else if (ss != SEC_E_OK && ss != SEC_I_CONTINUE_NEEDED)
{
throw new Exception("InitializeSecurityContext() failed!!!");
}
clientToken = ClientToken.GetSecBufferByteArray();
}
finally
{
ClientToken.Dispose();
}
InitializeKerberosStage = ss != SEC_E_OK;
}
public static extern int VerifySignature(ref SECURITY_HANDLE phContext, // Context to use
ref SecBufferDesc pMessage, // Message to sign
uint MessageSeqNo, // Message Sequence Num.
out uint pfQOP); // Quality of Protection
public static extern int DecryptMessage(ref SECURITY_HANDLE phContext,
ref SecBufferDesc pMessage,
uint MessageSeqNo,
out uint pfQOP);
public static extern int MakeSignature(ref SECURITY_HANDLE phContext, // Context to use
uint fQOP, // Quality of Protection
ref SecBufferDesc pMessage, // Message to sign
uint MessageSeqNo); // Message Sequence Num.
public static extern int EncryptMessage(ref SECURITY_HANDLE phContext,
uint fQOP, //managed ulong == 64 bits!!!
ref SecBufferDesc pMessage,
uint MessageSeqNo); //managed ulong == 64 bits!!!