/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
* or http://forgerock.org/license/CDDLv1.0.html.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at legal-notices/CDDLv1_0.txt.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2008 Sun Microsystems, Inc.
* Portions Copyright 2013-2015 ForgeRock AS
*/
package org.opends.server.authorization.dseecompat;
import org.forgerock.i18n.LocalizableMessage;
import static org.opends.messages.AccessControlMessages.*;
/**
* The class represents the ssf keyword in a bind rule.SSF stands for
* security strength factor.
*/
public class SSF implements KeywordBindRule {
/** Enumeration representing the bind rule operation type. */
private EnumBindRuleType type;
private static final int MAX_KEY_BITS=1024;
private int ssf;
private SSF(int ssf, EnumBindRuleType type) {
this.ssf = ssf;
this.type = type;
}
/**
* Create SSF instance using the specified expression string and bind rule
* type enumeration.
* @param expr The expression string.
* @param type The bind rule type enumeration.
* @return A SSF instance.
* @throws AciException If the SSF instance cannot be created.
*/
static SSF decode(String expr, EnumBindRuleType type) throws AciException {
int valueAsInt = 0;
try {
valueAsInt = Integer.parseInt(expr);
} catch (NumberFormatException nfe) {
LocalizableMessage message =
WARN_ACI_SYNTAX_INVALID_SSF_FORMAT.get(expr, nfe.getMessage());
throw new AciException(message);
}
if (valueAsInt <= 0 || valueAsInt > MAX_KEY_BITS) {
LocalizableMessage message = WARN_ACI_SYNTAX_INVALID_SSF_RANGE.get(expr);
throw new AciException(message);
}
return new SSF(valueAsInt, type);
}
/**
* Evaluate the specified evaluation context.
* @param evalCtx The evaluation context to evaluate.
*
* @return An evaluation result enumeration containing the result of the
* context evaluation.
*/
public EnumEvalResult evaluate(AciEvalContext evalCtx) {
int currentSSF = evalCtx.getCurrentSSF();
EnumEvalResult matched = getMatched(currentSSF);
return matched.getRet(type, false);
}
private EnumEvalResult getMatched(int currentSSF) {
switch (type) {
case EQUAL_BINDRULE_TYPE:
case NOT_EQUAL_BINDRULE_TYPE:
if (currentSSF == ssf) {
return EnumEvalResult.TRUE;
}
break;
case LESS_OR_EQUAL_BINDRULE_TYPE:
if (currentSSF <= ssf) {
return EnumEvalResult.TRUE;
}
break;
case LESS_BINDRULE_TYPE:
if (currentSSF < ssf) {
return EnumEvalResult.TRUE;
}
break;
case GREATER_OR_EQUAL_BINDRULE_TYPE:
if (currentSSF >= ssf) {
return EnumEvalResult.TRUE;
}
break;
case GREATER_BINDRULE_TYPE:
if (currentSSF > ssf) {
return EnumEvalResult.TRUE;
}
}
return EnumEvalResult.FALSE;
}
/** {@inheritDoc} */
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder();
toString(sb);
return sb.toString();
}
/** {@inheritDoc} */
@Override
public final void toString(StringBuilder buffer)
{
buffer.append(super.toString());
}
}