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//
// YaCyLegacyCredentials
// Copyright 2011 by Florian Richter
// First released 16.04.2011 at http://yacy.net
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program in the file lgpl21.txt
// If not, see <http://www.gnu.org/licenses/>.
//
package net.yacy.http;
import net.yacy.cora.order.Base64Order;
import net.yacy.cora.order.Digest;
import net.yacy.search.Switchboard;
import net.yacy.search.SwitchboardConstants;
import net.yacy.server.serverAccessTracker;
import org.eclipse.jetty.util.security.Credential;
/**
* implementation of YaCy's old admin password as jetty Credential
* supporting BASIC and DIGEST authentication
* and using MD5 encryptet passwords/credentials. Following RFC recommendation (to use the realm in MD5 hash)
* expecting a MD5 hash in format MD5( username:realm:password ), realm configured in yacy.init adminRealm
* (exception: old style credential MD5( username:password ) still accepted with BASIC auth)
*
*/
public class YaCyLegacyCredential extends Credential {
private static final long serialVersionUID = -3527894085562480001L;
private String hash; // remember password hash (for new style with prefix of used encryption supported "MD5:" )
private String foruser; // remember the user as YaCy credential is username:pwd (not just pwd)
private boolean isBase64enc; // remember hash encoding false = encodeMD5Hex(usr:pwd) ; true = encodeMD5Hex(Base64Order.standardCoder.encodeString(usr:pw))
private Credential c;
/**
* internal hash function for admin account
*
* @param pw clear password
* @return hash string
*/
public static String calcHash(String pw) { // old style hash
return Digest.encodeMD5Hex(Base64Order.standardCoder.encodeString(pw));
}
@Override
public boolean check(Object credentials) {
if (credentials instanceof Credential) { // for DIGEST auth
if (this.c == null) {
/* credential may be null after switching from BASIC to DIGEST authentication without re-encoding the password */
return false;
}
Credential credential = (Credential) credentials;
return credential.check(this.c);
}
if (credentials instanceof String) { // for BASIC auth
final String pw = (String) credentials;
if (isBase64enc) { // for old B64MD5 admin hashes
if (serverAccessTracker.timeSinceAccessFromLocalhost() < 100) {
// we allow localhost accesses also to submit the hash as password
// this is very important since that method is used by the scripts in bin/ which are based on bin/apicall.sh
// the cleartext password is not stored anywhere, but we must find a way to allow scripts to steer a peer.
// this is the exception that makes that possible.
// TODO: it should be better to check the actual access IP here, but that is not handed over to Credential classes :(
if ((pw).equals(this.hash)) return true;
}
// exception for admin use old style MD5hash (user:password)
return calcHash(foruser + ":" + pw).equals(this.hash); // for admin user
}
// normal users (and new admin pwd) for BASIC auth
if (hash.startsWith("MD5:") && hash != null) {
String realm = Switchboard.getSwitchboard().getConfig(SwitchboardConstants.ADMIN_REALM, "");
boolean success = Digest.encodeMD5Hex(foruser + ":" + realm + ":" + pw).equals(hash.substring(4));
// exception: allow the hash as pwd (used in bin/apicall.sh)
if (!success && foruser.equals(Switchboard.getSwitchboard().getConfig(SwitchboardConstants.ADMIN_ACCOUNT_USER_NAME, "admin"))) {
if (pw.equals(hash)) {
if (serverAccessTracker.timeSinceAccessFromLocalhost() < 100) {
return true;
}
}
}
return success;
}
return Digest.encodeMD5Hex(foruser + ":" + pw).equals(hash); // for old userdb hashes
}
throw new UnsupportedOperationException();
}
/**
* create Credential object from config file hash
*
* @param configHash hash as in config file hash(adminuser:pwd)
* @return
*/
public static Credential getCredentialForAdmin(String username, String configHash) {
YaCyLegacyCredential yc = new YaCyLegacyCredential();
if (configHash.startsWith("MD5:")) {
yc.isBase64enc = false;
yc.c = Credential.getCredential(configHash);
} else {
yc.isBase64enc = true;
}
yc.foruser = username;
yc.hash = configHash;
return yc;
}
/**
* create Credential object from password
*
* @param username
* @param configHash encodeMD5Hex("user:realm:pwd") as stored in UserDB
* @return
*/
public static Credential getCredentialForUserDB(String username, String configHash) {
YaCyLegacyCredential yc = new YaCyLegacyCredential();
yc.c = Credential.getCredential(configHash); // creates a MD5 hash credential
yc.foruser = username;
yc.isBase64enc = false;
yc.hash = configHash;
return yc;
}
}
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