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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cms.policy.constraints;
import java.util.*;
import com.netscape.certsrv.request.IRequest;
import com.netscape.certsrv.request.PolicyResult;
import com.netscape.certsrv.policy.*;
import com.netscape.certsrv.base.*;
import com.netscape.certsrv.apps.CMS;
import com.netscape.certsrv.common.*;
import netscape.security.x509.*;
import com.netscape.cms.policy.APolicyRule;
/**
* KeyAlgorithmConstraints enforces a constraint that the RA or a CA
* honor only the keys generated using one of the permitted algorithms
* such as RSA, DSA or DH.
* <P>
* <PRE>
* NOTE: The Policy Framework has been replaced by the Profile Framework.
* </PRE>
* <P>
*
* @deprecated
* @version $Revision$, $Date$
*/
public class KeyAlgorithmConstraints extends APolicyRule
implements IEnrollmentPolicy, IExtendedPluginInfo {
private Vector mAlgorithms;
private final static String DEF_KEY_ALGORITHM = "RSA,DSA";
private final static String PROP_ALGORITHMS = "algorithms";
private final static String[] supportedAlgorithms =
{"RSA", "DSA", "DH" };
private final static Vector defConfParams = new Vector();
static {
defConfParams.addElement(PROP_ALGORITHMS + "=" +
DEF_KEY_ALGORITHM);
}
public String[] getExtendedPluginInfo(Locale locale) {
String params[] = {
"algorithms;choice(RSA\\,DSA,RSA,DSA);Certificate's key can be one of these algorithms",
IExtendedPluginInfo.HELP_TOKEN +
";configuration-policyrules-keyalgorithmconstraints",
IExtendedPluginInfo.HELP_TEXT +
";Rejects the request if the key in the certificate is " +
"not of the type specified"
};
return params;
}
public KeyAlgorithmConstraints() {
NAME = "KeyAlgorithmConstraints";
DESC = "Enforces Key Algorithm Constraints.";
}
/**
* Initializes this policy rule.
* <P>
*
* The entries probably are of the form
* ra.Policy.rule.<ruleName>.implName=KeyAlgorithmConstraints
* ra.Policy.rule.<ruleName>.algorithms=RSA,DSA
* ra.Policy.rule.<ruleName>.enable=true
* ra.Policy.rule.<ruleName>.predicate=ou==Sales
*
* @param config The config store reference
*/
public void init(ISubsystem owner, IConfigStore config)
throws EPolicyException {
mAlgorithms = new Vector();
if (config == null || config.size() == 0) {
mAlgorithms.addElement(DEF_KEY_ALGORITHM);
return;
}
// Get Algorithm names
String algNames = null;
try {
algNames = config.getString(PROP_ALGORITHMS, null);
} catch (Exception e) {
String[] params = {getInstanceName(), e.toString()};
throw new EPolicyException(
CMS.getUserMessage("CMS_POLICY_INVALID_POLICY_CONFIG", params));
}
if (algNames == null) {
mAlgorithms.addElement(DEF_KEY_ALGORITHM);
return;
}
StringTokenizer tok = new StringTokenizer(algNames, ",");
while (tok.hasMoreTokens()) {
String alg = tok.nextToken().trim().toUpperCase();
if (alg.length() == 0)
continue;
mAlgorithms.addElement(alg);
}
// Check if configured algorithms are supported.
for (Enumeration e = mAlgorithms.elements();
e.hasMoreElements();) {
int i;
String configuredAlg = (String) e.nextElement();
// See if it is a supported algorithm.
for (i = 0; i < supportedAlgorithms.length; i++) {
if (configuredAlg.equals(supportedAlgorithms[i]))
break;
}
// Did we not find it?
if (i == supportedAlgorithms.length)
throw new EPolicyException(
CMS.getUserMessage("CMS_POLICY_UNSUPPORTED_KEY_ALG",
getInstanceName(), configuredAlg));
}
}
/**
* Applies the policy on the given Request.
* <P>
*
* @param req The request on which to apply policy.
* @return The policy result object.
*/
public PolicyResult apply(IRequest req) {
PolicyResult result = PolicyResult.ACCEPTED;
try {
// Get the certificate info from the request
// X509CertInfo certInfo[] = (X509CertInfo[])
// req.get(IRequest.CERT_INFO);
X509CertInfo certInfo[] = req.getExtDataInCertInfoArray(IRequest.CERT_INFO);
// We need to have a certificate info set
if (certInfo == null) {
setError(req, CMS.getUserMessage("CMS_POLICY_NO_CERT_INFO",
getInstanceName()), "");
return PolicyResult.REJECTED;
}
// Else check if the key algorithm is supported.
for (int i = 0; i < certInfo.length; i++) {
CertificateX509Key certKey = (CertificateX509Key)
certInfo[i].get(X509CertInfo.KEY);
X509Key key = (X509Key) certKey.get(CertificateX509Key.KEY);
String alg = key.getAlgorithmId().getName().toUpperCase();
if (!mAlgorithms.contains(alg)) {
setError(req, CMS.getUserMessage("CMS_POLICY_KEY_ALG_VIOLATION",
getInstanceName(), alg), "");
result = PolicyResult.REJECTED;
}
}
} catch (Exception e) {
String params[] = {getInstanceName(), e.toString()};
setError(req, CMS.getUserMessage("CMS_POLICY_UNEXPECTED_POLICY_ERROR",
params), "");
result = PolicyResult.REJECTED;
}
return result;
}
/**
* Return configured parameters for a policy rule instance.
*
* @return nvPairs A Vector of name/value pairs.
*/
public Vector getInstanceParams() {
Vector v = new Vector();
StringBuffer sb = new StringBuffer();
for (Enumeration e = mAlgorithms.elements(); e.hasMoreElements();) {
sb.append((String) e.nextElement());
sb.append(",");
}
if (sb.length() > 0)
sb.setLength(sb.length() - 1);
v.addElement(PROP_ALGORITHMS + "=" + sb.toString());
return v;
}
/**
* Return default parameters for a policy implementation.
*
* @return nvPairs A Vector of name/value pairs.
*/
public Vector getDefaultParams() {
return defConfParams;
}
}
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