/**
* Waffle (https://github.com/dblock/waffle)
*
* Copyright (c) 2010 - 2014 Application Security, Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Application Security, Inc.
*/
package waffle.windows.auth.impl;
import waffle.windows.auth.IWindowsCredentialsHandle;
import waffle.windows.auth.IWindowsIdentity;
import waffle.windows.auth.IWindowsImpersonationContext;
import waffle.windows.auth.IWindowsSecurityContext;
import com.sun.jna.platform.win32.Secur32;
import com.sun.jna.platform.win32.Sspi;
import com.sun.jna.platform.win32.Sspi.CredHandle;
import com.sun.jna.platform.win32.Sspi.CtxtHandle;
import com.sun.jna.platform.win32.Sspi.SecBufferDesc;
import com.sun.jna.platform.win32.Win32Exception;
import com.sun.jna.platform.win32.WinError;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.ptr.IntByReference;
/**
* Windows Security Context.
*
* @author dblock[at]dblock[dot]org
*/
public class WindowsSecurityContextImpl implements IWindowsSecurityContext {
private String principalName;
private String securityPackage;
private SecBufferDesc token;
private CtxtHandle ctx;
private IntByReference attr;
private CredHandle credentials;
private boolean continueFlag;
@Override
public IWindowsImpersonationContext impersonate() {
return new WindowsSecurityContextImpersonationContextImpl(this.ctx);
}
@Override
public IWindowsIdentity getIdentity() {
final HANDLEByReference phContextToken = new HANDLEByReference();
final int rc = Secur32.INSTANCE.QuerySecurityContextToken(this.ctx, phContextToken);
if (WinError.SEC_E_OK != rc) {
throw new Win32Exception(rc);
}
return new WindowsIdentityImpl(phContextToken.getValue());
}
@Override
public String getSecurityPackage() {
return this.securityPackage;
}
@Override
public byte[] getToken() {
return this.token == null || this.token.getBytes() == null ? null : this.token.getBytes().clone();
}
/**
* Get the current Windows security context for a given SSPI package.
*
* @param securityPackage
* SSPI package.
* @param targetName
* The target of the context. The string contents are security-package specific.
* @return Windows security context.
*/
public static IWindowsSecurityContext getCurrent(final String securityPackage, final String targetName) {
final IWindowsCredentialsHandle credentialsHandle = WindowsCredentialsHandleImpl.getCurrent(securityPackage);
credentialsHandle.initialize();
try {
final WindowsSecurityContextImpl ctx = new WindowsSecurityContextImpl();
ctx.setPrincipalName(WindowsAccountImpl.getCurrentUsername());
ctx.setCredentialsHandle(credentialsHandle.getHandle());
ctx.setSecurityPackage(securityPackage);
ctx.initialize(null, null, targetName);
return ctx;
} finally {
credentialsHandle.dispose();
}
}
@Override
public void initialize(final CtxtHandle continueCtx, final SecBufferDesc continueToken, final String targetName) {
this.attr = new IntByReference();
this.ctx = new CtxtHandle();
int tokenSize = Sspi.MAX_TOKEN_SIZE;
int rc = 0;
do {
this.token = new SecBufferDesc(Sspi.SECBUFFER_TOKEN, tokenSize);
rc = Secur32.INSTANCE.InitializeSecurityContext(this.credentials, continueCtx, targetName,
Sspi.ISC_REQ_CONNECTION, 0, Sspi.SECURITY_NATIVE_DREP, continueToken, 0, this.ctx, this.token,
this.attr, null);
switch (rc) {
case WinError.SEC_E_INSUFFICIENT_MEMORY:
tokenSize += Sspi.MAX_TOKEN_SIZE;
break;
case WinError.SEC_I_CONTINUE_NEEDED:
this.continueFlag = true;
break;
case WinError.SEC_E_OK:
this.continueFlag = false;
break;
default:
throw new Win32Exception(rc);
}
} while (rc == WinError.SEC_E_INSUFFICIENT_MEMORY);
}
@Override
public void dispose() {
dispose(this.ctx);
}
/**
* Dispose a security context.
*
* @param ctx
* Security context.
* @return True if a context was disposed.
*/
public static boolean dispose(final CtxtHandle ctx) {
if (ctx != null && !ctx.isNull()) {
final int rc = Secur32.INSTANCE.DeleteSecurityContext(ctx);
if (WinError.SEC_E_OK != rc) {
throw new Win32Exception(rc);
}
return true;
}
return false;
}
@Override
public String getPrincipalName() {
return this.principalName;
}
public void setPrincipalName(final String value) {
this.principalName = value;
}
@Override
public CtxtHandle getHandle() {
return this.ctx;
}
public void setCredentialsHandle(final CredHandle handle) {
this.credentials = handle;
}
public void setToken(final byte[] bytes) {
this.token = new SecBufferDesc(Sspi.SECBUFFER_TOKEN, bytes);
}
public void setSecurityPackage(final String value) {
this.securityPackage = value;
}
public void setSecurityContext(final CtxtHandle phNewServerContext) {
this.ctx = phNewServerContext;
}
@Override
public boolean isContinue() {
return this.continueFlag;
}
public void setContinue(final boolean b) {
this.continueFlag = b;
}
}