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/**
* Copyright 2012 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.common.util;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.CodeSource;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
import java.security.cert.Certificate;
public class SecurityUtil {
/* package private */ static final AccessControlContext localACC;
/* package private */ static final Certificate[] localCerts;
static {
localACC = AccessController.doPrivileged(new PrivilegedAction<AccessControlContext>() {
public AccessControlContext run() {
return AccessController.getContext();
} } );
localCerts = getCerts(SecurityUtil.class);
}
public static final Certificate[] getCerts(final Class<?> clz) {
final ProtectionDomain pd = AccessController.doPrivileged(new PrivilegedAction<ProtectionDomain>() {
public ProtectionDomain run() {
return clz.getProtectionDomain();
} } );
final CodeSource cs = (null != pd) ? pd.getCodeSource() : null;
final Certificate[] certs = (null != cs) ? cs.getCertificates() : null;
return (null != certs && certs.length>0) ? certs : null;
}
public static final boolean equals(Certificate[] a, Certificate[] b) {
if(a == b) {
return true;
}
if(a==null || b==null) {
return false;
}
if(a.length != b.length) {
return false;
}
int i = 0;
while( i < a.length && a[i].equals(b[i]) ) {
i++;
}
return i == a.length;
}
public static final boolean equalsLocalCert(Certificate[] b) {
return equals(localCerts, b);
}
public static final boolean equalsLocalCert(Class<?> clz) {
return equalsLocalCert(getCerts(clz));
}
public static final AccessControlContext getCommonAccessControlContext(Class<?> clz) {
if(equalsLocalCert(clz)) {
return localACC;
} else {
return null;
}
}
}
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