public ClientForm()
{
this.connected = false;
this.initializing = false;
this.lastServerToken = null;
// --- UI ---
InitializeComponent();
this.connectButton.Click += connectButton_Click;
this.disconnectButton.Click += disconnectButton_Click;
this.encryptButton.Click += encryptButton_Click;
this.signButton.Click += signButton_Click;
this.FormClosing += Form1_FormClosing;
// --- SSPI ---
this.cred = new ClientCredential( PackageNames.Negotiate );
this.context = new ClientContext(
cred,
"",
ContextAttrib.InitIntegrity |
ContextAttrib.ReplayDetect |
ContextAttrib.SequenceDetect |
ContextAttrib.MutualAuth |
ContextAttrib.Delegate |
ContextAttrib.Confidentiality
);
this.connection = new CustomConnection();
this.connection.Received += connection_Received;
this.connection.Disconnected += connection_Disconnected;
// --- UI Fillout ---
this.usernameTextbox.Text = this.cred.PrincipleName;
UpdateButtons();
}
/// <summary>
/// Initializes a new instance of the ClientContext class. The context is not fully initialized and usable
/// until the authentication cycle has been completed.
/// </summary>
/// <param name="cred">The security credential to authenticate as.</param>
/// <param name="serverPrinc">The principle name of the server to connect to, or null for any.</param>
/// <param name="requestedAttribs">Requested attributes that describe the desired properties of the
/// context once it is established. If a context cannot be established that satisfies the indicated
/// properties, the context initialization is aborted.</param>
public ClientContext( ClientCredential cred, string serverPrinc, ContextAttrib requestedAttribs )
: base(cred)
{
this.serverPrinc = serverPrinc;
this.requestedAttribs = requestedAttribs;
}
private static void CredTest( string packageName )
{
ClientCredential clientCred = null;
ClientContext client = null;
ServerCredential serverCred = null;
ServerContext server = null;
byte[] clientToken;
byte[] serverToken;
SecurityStatus clientStatus;
SecurityStatus serverStatus;
try
{
clientCred = new ClientCredential( packageName );
serverCred = new ServerCredential( packageName );
Console.Out.WriteLine( clientCred.PrincipleName );
client = new ClientContext(
clientCred,
serverCred.PrincipleName,
ContextAttrib.MutualAuth |
ContextAttrib.InitIdentify |
ContextAttrib.Confidentiality |
ContextAttrib.ReplayDetect |
ContextAttrib.SequenceDetect |
ContextAttrib.Connection |
ContextAttrib.Delegate
);
server = new ServerContext(
serverCred,
ContextAttrib.MutualAuth |
ContextAttrib.AcceptIdentify |
ContextAttrib.Confidentiality |
ContextAttrib.ReplayDetect |
ContextAttrib.SequenceDetect |
ContextAttrib.Connection |
ContextAttrib.Delegate
);
clientToken = null;
serverToken = null;
clientStatus = client.Init( serverToken, out clientToken );
while ( true )
{
serverStatus = server.AcceptToken( clientToken, out serverToken );
if ( serverStatus != SecurityStatus.ContinueNeeded && clientStatus != SecurityStatus.ContinueNeeded ) { break; }
clientStatus = client.Init( serverToken, out clientToken );
if ( serverStatus != SecurityStatus.ContinueNeeded && clientStatus != SecurityStatus.ContinueNeeded ) { break; }
}
Console.Out.WriteLine( "Server authority: " + server.AuthorityName );
Console.Out.WriteLine( "Server context user: "******"Client authority: " + client.AuthorityName );
Console.Out.WriteLine( "Client context user: "******"Hello, world. This is a long message that will be encrypted";
string rtMessage;
byte[] plainText = new byte[Encoding.UTF8.GetByteCount( message )];
byte[] cipherText;
byte[] roundTripPlaintext;
Encoding.UTF8.GetBytes( message, 0, message.Length, plainText, 0 );
cipherText = client.Encrypt( plainText );
roundTripPlaintext = server.Decrypt( cipherText );
if( roundTripPlaintext.Length != plainText.Length )
{
throw new Exception();
}
for( int i= 0; i < plainText.Length; i++ )
{
if( plainText[i] != roundTripPlaintext[i] )
{
throw new Exception();
}
}
rtMessage = Encoding.UTF8.GetString( roundTripPlaintext, 0, roundTripPlaintext.Length );
if( rtMessage.Equals( message ) == false )
{
throw new Exception();
}
using( server.ImpersonateClient() )
{
}
cipherText = client.MakeSignature( plainText );
bool goodSig = server.VerifySignature( cipherText, out roundTripPlaintext );
if ( goodSig == false ||
roundTripPlaintext.Length != plainText.Length )
{
throw new Exception();
}
for ( int i = 0; i < plainText.Length; i++ )
{
if ( plainText[i] != roundTripPlaintext[i] )
{
throw new Exception();
}
}
Console.Out.Flush();
}
finally
{
if ( server != null )
{
server.Dispose();
}
if ( client != null )
{
client.Dispose();
}
if( clientCred != null )
{
clientCred.Dispose();
}
if ( serverCred != null )
{
serverCred.Dispose();
}
}
}
