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/*
* Copyright 2007-2021 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright 2007-2021 Ping Identity Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (C) 2007-2021 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* 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, see .
*/
package com.unboundid.ldap.sdk.controls;
import com.unboundid.asn1.ASN1Element;
import com.unboundid.asn1.ASN1OctetString;
import com.unboundid.asn1.ASN1Sequence;
import com.unboundid.ldap.sdk.Control;
import com.unboundid.ldap.sdk.DN;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.Debug;
import com.unboundid.util.NotMutable;
import com.unboundid.util.NotNull;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import com.unboundid.util.Validator;
import static com.unboundid.ldap.sdk.controls.ControlMessages.*;
/**
* This class provides an implementation of the proxied authorization V1
* request control, which may be used to request that the associated operation
* be performed as if it had been requested by some other user. It is based on
* the specification provided in early versions of the
* draft-weltman-ldapv3-proxy Internet Draft (this implementation is based on
* the "-04" revision). Later versions of the draft, and subsequently
* RFC 4370, define a second
* version of the proxied authorization control with a different OID and
* different value format. This control is supported primarily for legacy
* purposes, and it is recommended that new applications use the
* {@link ProxiedAuthorizationV2RequestControl} instead if this version.
*
* The value of this control includes the DN of the user as whom the operation
* should be performed. Note that it should be a distinguished name, and not an
* authzId value as is used in the proxied authorization V2 control.
*
* This control may be used in conjunction with add, delete, compare, delete,
* extended, modify, modify DN, and search requests. In that case, the
* associated operation will be processed under the authority of the specified
* authorization identity rather than the identity associated with the client
* connection (i.e., the user as whom that connection is bound). Note that
* because of the inherent security risks associated with the use of the proxied
* authorization control, most directory servers which support its use enforce
* strict restrictions on the users that are allowed to request this control.
* Note that while the directory server should return a
* {@link ResultCode#AUTHORIZATION_DENIED} result for a proxied authorization V2
* control if the requester does not have the appropriate permission to use that
* control, this result will not necessarily be used for the same condition with
* the proxied authorization V1 control because this result code was not defined
* until the release of the proxied authorization V2 specification.
* code.
*
* There is no corresponding response control for this request control.
*
*
Example
* The following example demonstrates the use of the proxied authorization V1
* control to delete an entry under the authority of the user with DN
* "uid=alternate.user,ou=People,dc=example,dc=com":
*
* // Create a delete request to delete an entry. Include the proxied
* // authorization v1 request control in the delete request so that the
* // delete will be processed as user
* // "uid=alternate.user,ou=People,dc=example,dc=com" instead of the user
* // that's actually authenticated on the connection.
* DeleteRequest deleteRequest =
* new DeleteRequest("uid=test.user,ou=People,dc=example,dc=com");
* deleteRequest.addControl(new ProxiedAuthorizationV1RequestControl(
* "uid=alternate.user,ou=People,dc=example,dc=com"));
*
* LDAPResult deleteResult;
* try
* {
* deleteResult = connection.delete(deleteRequest);
* // If we got here, then the delete was successful.
* }
* catch (LDAPException le)
* {
* // The delete failed for some reason. In addition to all of the normal
* // reasons a delete could fail (e.g., the entry doesn't exist, or has one
* // or more subordinates), proxied-authorization specific failures may
* // include that the authenticated user doesn't have permission to use the
* // proxied authorization control to impersonate the alternate user, that
* // the alternate user doesn't exist, or that the alternate user doesn't
* // have permission to perform the requested operation.
* deleteResult = le.toLDAPResult();
* ResultCode resultCode = le.getResultCode();
* String errorMessageFromServer = le.getDiagnosticMessage();
* }
*
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class ProxiedAuthorizationV1RequestControl
extends Control
{
/**
* The OID (2.16.840.1.113730.3.4.12) for the proxied authorization v1 request
* control.
*/
@NotNull public static final String PROXIED_AUTHORIZATION_V1_REQUEST_OID =
"2.16.840.1.113730.3.4.12";
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = 7312632337431962774L;
// The DN of the target user under whose authorization the associated
// operation should be performed.
@NotNull private final String proxyDN;
/**
* Creates a new proxied authorization V1 request control that will proxy as
* the specified user.
*
* @param proxyDN The DN of the target user under whose authorization the
* associated request should be performed. It must not be
* {@code null}, although it may be an empty string to
* request an anonymous authorization.
*/
public ProxiedAuthorizationV1RequestControl(@NotNull final String proxyDN)
{
super(PROXIED_AUTHORIZATION_V1_REQUEST_OID, true, encodeValue(proxyDN));
Validator.ensureNotNull(proxyDN);
this.proxyDN = proxyDN;
}
/**
* Creates a new proxied authorization V1 request control that will proxy as
* the specified user.
*
* @param proxyDN The DN of the target user under whose authorization the
* associated request should be performed. It must not be
* {@code null}.
*/
public ProxiedAuthorizationV1RequestControl(@NotNull final DN proxyDN)
{
super(PROXIED_AUTHORIZATION_V1_REQUEST_OID, true,
encodeValue(proxyDN.toString()));
this.proxyDN = proxyDN.toString();
}
/**
* Creates a new proxied authorization v1 request control which is decoded
* from the provided generic control.
*
* @param control The generic control to be decoded as a proxied
* authorization v1 request control.
*
* @throws LDAPException If the provided control cannot be decoded as a
* proxied authorization v1 request control.
*/
public ProxiedAuthorizationV1RequestControl(@NotNull final Control control)
throws LDAPException
{
super(control);
final ASN1OctetString value = control.getValue();
if (value == null)
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_PROXY_V1_NO_VALUE.get());
}
try
{
final ASN1Element valueElement = ASN1Element.decode(value.getValue());
final ASN1Element[] elements =
ASN1Sequence.decodeAsSequence(valueElement).elements();
proxyDN = ASN1OctetString.decodeAsOctetString(elements[0]).stringValue();
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_PROXYV1_DECODE_ERROR.get(e), e);
}
}
/**
* Encodes the provided information into an octet string that can be used as
* the value for this control.
*
* @param proxyDN The DN of the target user under whose authorization the
* associated request should be performed. It must not be
* {@code null}, although it may be an empty string to
* request an anonymous authorization.
*
* @return An ASN.1 octet string that can be used as the value for this
* control.
*/
@NotNull()
private static ASN1OctetString encodeValue(@NotNull final String proxyDN)
{
final ASN1Element[] valueElements =
{
new ASN1OctetString(proxyDN)
};
return new ASN1OctetString(new ASN1Sequence(valueElements).encode());
}
/**
* Retrieves the DN of the target user under whose authorization the
* associated request should be performed.
*
* @return The DN of the target user under whose authorization the associated
* request should be performed.
*/
@NotNull()
public String getProxyDN()
{
return proxyDN;
}
/**
* {@inheritDoc}
*/
@Override()
@NotNull()
public String getControlName()
{
return INFO_CONTROL_NAME_PROXIED_AUTHZ_V1_REQUEST.get();
}
/**
* {@inheritDoc}
*/
@Override()
public void toString(@NotNull final StringBuilder buffer)
{
buffer.append("ProxiedAuthorizationV1RequestControl(proxyDN='");
buffer.append(proxyDN);
buffer.append("')");
}
}
