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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use
Java API for communicating with LDAP directory servers and performing
related tasks like reading and writing LDIF, encoding and decoding data
using base64 and ASN.1 BER, and performing secure communication. This
package contains the Commercial Edition of the LDAP SDK, which includes
all of the general-purpose functionality contained in the Standard
Edition, plus additional functionality specific to UnboundID server
products.
/*
* Copyright 2011-2016 UnboundID Corp.
* All Rights Reserved.
*/
/*
* Copyright (C) 2015-2016 UnboundID Corp.
*
* 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.unboundidds.controls;
import java.util.ArrayList;
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.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.Debug;
import com.unboundid.util.NotMutable;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import com.unboundid.util.Validator;
import static com.unboundid.ldap.sdk.unboundidds.controls.ControlMessages.*;
/**
*
* NOTE: This class is part of the Commercial Edition of the UnboundID
* LDAP SDK for Java. It is not available for use in applications that
* include only the Standard Edition of the LDAP SDK, and is not supported for
* use in conjunction with non-UnboundID products.
*
* This class provides a request control that can be used by the client to
* identify the purpose of the associated operation. It can be used in
* conjunction with any kind of operation, and may be used to provide
* information about the reason for that operation, as well as about the client
* application used to generate the request. This may be very useful for
* debugging and auditing purposes.
*
* The criticality for this control may be either {@code true} or {@code false}.
* It must have a value with the following encoding:
*
* OperationPurposeRequest ::= SEQUENCE {
* applicationName [0] OCTET STRING OPTIONAL,
* applicationVersion [1] OCTET STRING OPTIONAL,
* codeLocation [2] OCTET STRING OPTIONAL,
* requestPurpose [3] OCTET STRING OPTIONAL
* ... }
*
* At least one of the elements in the value sequence must be present.
*
* Example
* The following example demonstrates a sample authentication consisting of a
* search to find a user followed by a bind to verify that user's password.
* Both the search and bind requests will include operation purpose controls
* with information about the reason for the request. Note that for the sake
* of brevity and clarity, error handling has been omitted from this example.
*
* SearchRequest searchRequest = new SearchRequest("dc=example,dc=com",
* SearchScope.SUB, Filter.createEqualityFilter("uid", uidValue),
* "1.1");
* searchRequest.addControl(new OperationPurposeRequestControl(appName,
* appVersion, 0, "Retrieve the entry for a user with a given uid"));
* Entry userEntry = connection.searchForEntry(searchRequest);
*
* SimpleBindRequest bindRequest = new SimpleBindRequest(userEntry.getDN(),
* password, new OperationPurposeRequestControl(appName, appVersion, 0,
* "Bind as a user to verify the provided credentials."));
* BindResult bindResult = connection.bind(bindRequest);
*
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class OperationPurposeRequestControl
extends Control
{
/**
* The OID (1.3.6.1.4.1.30221.2.5.19) for the operation purpose request
* control.
*/
public static final String OPERATION_PURPOSE_REQUEST_OID =
"1.3.6.1.4.1.30221.2.5.19";
/**
* The BER type for the element that specifies the application name.
*/
private static final byte TYPE_APP_NAME = (byte) 0x80;
/**
* The BER type for the element that specifies the application version.
*/
private static final byte TYPE_APP_VERSION = (byte) 0x81;
/**
* The BER type for the element that specifies the code location.
*/
private static final byte TYPE_CODE_LOCATION = (byte) 0x82;
/**
* The BER type for the element that specifies the request purpose.
*/
private static final byte TYPE_REQUEST_PURPOSE = (byte) 0x83;
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = -5552051862785419833L;
// The application name for this control, if any.
private final String applicationName;
// The application version for this control, if any.
private final String applicationVersion;
// The code location for this control, if any.
private final String codeLocation;
// The request purpose for this control, if any.
private final String requestPurpose;
/**
* Creates a new operation purpose request control with the provided
* information. It will not be critical. If the generateCodeLocation
* argument has a value of {@code false}, then at least one of the
* applicationName, applicationVersion, and requestPurpose arguments must
* be non-{@code null}.
*
* @param applicationName The name of the application generating the
* associated request. It may be {@code null} if
* this should not be included in the control.
* @param applicationVersion Information about the version of the
* application generating the associated request.
* It may be {@code null} if this should not be
* included in the control.
* @param codeLocationFrames Indicates that the code location should be
* automatically generated with a condensed stack
* trace for the current thread, using the
* specified number of stack frames. A value that
* is less than or equal to zero indicates an
* unlimited number of stack frames should be
* included.
* @param requestPurpose A string identifying the purpose of the
* associated request. It may be {@code null} if
* this should not be included in the control.
*/
public OperationPurposeRequestControl(final String applicationName,
final String applicationVersion,
final int codeLocationFrames,
final String requestPurpose)
{
this(false, applicationName, applicationVersion,
generateStackTrace(codeLocationFrames), requestPurpose);
}
/**
* Creates a new operation purpose request control with the provided
* information. At least one of the applicationName, applicationVersion,
* codeLocation, and requestPurpose arguments must be non-{@code null}.
*
* @param isCritical Indicates whether the control should be
* considered critical.
* @param applicationName The name of the application generating the
* associated request. It may be {@code null} if
* this should not be included in the control.
* @param applicationVersion Information about the version of the
* application generating the associated request.
* It may be {@code null} if this should not be
* included in the control.
* @param codeLocation Information about the location in the
* application code in which the associated
* request is generated (e.g., the class and/or
* method name, or any other useful identifier).
* It may be {@code null} if this should not be
* included in the control.
* @param requestPurpose A string identifying the purpose of the
* associated request. It may be {@code null} if
* this should not be included in the control.
*/
public OperationPurposeRequestControl(final boolean isCritical,
final String applicationName,
final String applicationVersion,
final String codeLocation,
final String requestPurpose)
{
super(OPERATION_PURPOSE_REQUEST_OID, isCritical,
encodeValue(applicationName, applicationVersion, codeLocation,
requestPurpose));
this.applicationName = applicationName;
this.applicationVersion = applicationVersion;
this.codeLocation = codeLocation;
this.requestPurpose = requestPurpose;
}
/**
* Creates a new operation purpose request control which is decoded from the
* provided generic control.
*
* @param control The generic control to be decoded as an operation purpose
* request control.
*
* @throws LDAPException If the provided control cannot be decoded as an
* operation purpose request control.
*/
public OperationPurposeRequestControl(final Control control)
throws LDAPException
{
super(control);
final ASN1OctetString value = control.getValue();
if (value == null)
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_OP_PURPOSE_NO_VALUE.get());
}
final ASN1Element[] valueElements;
try
{
valueElements =
ASN1Sequence.decodeAsSequence(value.getValue()).elements();
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_OP_PURPOSE_VALUE_NOT_SEQUENCE.get(
StaticUtils.getExceptionMessage(e)),
e);
}
if (valueElements.length == 0)
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_OP_PURPOSE_VALUE_SEQUENCE_EMPTY.get());
}
String appName = null;
String appVersion = null;
String codeLoc = null;
String reqPurpose = null;
for (final ASN1Element e : valueElements)
{
switch (e.getType())
{
case TYPE_APP_NAME:
appName = ASN1OctetString.decodeAsOctetString(e).stringValue();
break;
case TYPE_APP_VERSION:
appVersion = ASN1OctetString.decodeAsOctetString(e).stringValue();
break;
case TYPE_CODE_LOCATION:
codeLoc = ASN1OctetString.decodeAsOctetString(e).stringValue();
break;
case TYPE_REQUEST_PURPOSE:
reqPurpose = ASN1OctetString.decodeAsOctetString(e).stringValue();
break;
default:
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_OP_PURPOSE_VALUE_UNSUPPORTED_ELEMENT.get(
StaticUtils.toHex(e.getType())));
}
}
applicationName = appName;
applicationVersion = appVersion;
codeLocation = codeLoc;
requestPurpose = reqPurpose;
}
/**
* Generates a compact stack trace for the current thread, The stack trace
* elements will start with the last frame to call into this class (so that
* frames referencing this class, and anything called by this class in the
* process of getting the stack trace will be omitted). Elements will be
* space-delimited and will contain the unqualified class name, a period,
* the method name, a colon, and the source line number.
*
* @param numFrames The maximum number of frames to capture in the stack
* trace.
*
* @return The generated stack trace for the current thread.
*/
private static String generateStackTrace(final int numFrames)
{
final StringBuilder buffer = new StringBuilder();
final int n = (numFrames > 0) ? numFrames : Integer.MAX_VALUE;
int c = 0;
boolean skip = true;
for (final StackTraceElement e : Thread.currentThread().getStackTrace())
{
final String className = e.getClassName();
if (className.equals(OperationPurposeRequestControl.class.getName()))
{
skip = false;
continue;
}
else if (skip)
{
continue;
}
if (buffer.length() > 0)
{
buffer.append(' ');
}
final int lastPeriodPos = className.lastIndexOf('.');
if (lastPeriodPos > 0)
{
buffer.append(className.substring(lastPeriodPos+1));
}
else
{
buffer.append(className);
}
buffer.append('.');
buffer.append(e.getMethodName());
buffer.append(':');
buffer.append(e.getLineNumber());
c++;
if (c >= n)
{
break;
}
}
return buffer.toString();
}
/**
* Encodes the provided information into a form suitable for use as the value
* of this control.
*
* @param applicationName The name of the application generating the
* associated request. It may be {@code null} if
* this should not be included in the control.
* @param applicationVersion Information about the version of the
* application generating the associated request.
* It may be {@code null} if this should not be
* included in the control.
* @param codeLocation Information about the location in the
* application code in which the associated
* request is generated (e.g., the class and/or
* method name, or any other useful identifier).
* It may be {@code null} if this should not be
* included in the control.
* @param requestPurpose A string identifying the purpose of the
* associated request. It may be {@code null} if
* this should not be included in the control.
*
* @return The encoded value for this control.
*/
private static ASN1OctetString encodeValue(final String applicationName,
final String applicationVersion,
final String codeLocation,
final String requestPurpose)
{
Validator.ensureFalse((applicationName == null) &&
(applicationVersion == null) && (codeLocation == null) &&
(requestPurpose == null));
final ArrayList elements = new ArrayList(4);
if (applicationName != null)
{
elements.add(new ASN1OctetString(TYPE_APP_NAME, applicationName));
}
if (applicationVersion != null)
{
elements.add(new ASN1OctetString(TYPE_APP_VERSION, applicationVersion));
}
if (codeLocation != null)
{
elements.add(new ASN1OctetString(TYPE_CODE_LOCATION, codeLocation));
}
if (requestPurpose != null)
{
elements.add(new ASN1OctetString(TYPE_REQUEST_PURPOSE, requestPurpose));
}
return new ASN1OctetString(new ASN1Sequence(elements).encode());
}
/**
* Retrieves the name of the application that generated the associated
* request, if available.
*
* @return The name of the application that generated the associated request,
* or {@code null} if that is not available.
*/
public String getApplicationName()
{
return applicationName;
}
/**
* Retrieves information about the version of the application that generated
* the associated request, if available.
*
* @return Information about the version of the application that generated
* the associated request, or {@code null} if that is not available.
*/
public String getApplicationVersion()
{
return applicationVersion;
}
/**
* Retrieves information about the location in the application code in which
* the associated request was created, if available.
*
* @return Information about the location in the application code in which
* the associated request was created, or {@code null} if that is not
* available.
*/
public String getCodeLocation()
{
return codeLocation;
}
/**
* Retrieves a message with information about the purpose of the associated
* request, if available.
*
* @return A message with information about the purpose of the associated
* request, or {@code null} if that is not available.
*/
public String getRequestPurpose()
{
return requestPurpose;
}
/**
* {@inheritDoc}
*/
@Override()
public String getControlName()
{
return INFO_CONTROL_NAME_OP_PURPOSE.get();
}
/**
* {@inheritDoc}
*/
@Override()
public void toString(final StringBuilder buffer)
{
buffer.append("OperationPurposeRequestControl(isCritical=");
buffer.append(isCritical());
if (applicationName != null)
{
buffer.append(", appName='");
buffer.append(applicationName);
buffer.append('\'');
}
if (applicationVersion != null)
{
buffer.append(", appVersion='");
buffer.append(applicationVersion);
buffer.append('\'');
}
if (codeLocation != null)
{
buffer.append(", codeLocation='");
buffer.append(codeLocation);
buffer.append('\'');
}
if (requestPurpose != null)
{
buffer.append(", purpose='");
buffer.append(requestPurpose);
buffer.append('\'');
}
buffer.append(')');
}
}
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