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/*
* Copyright 2015-2017 UnboundID Corp.
* All Rights Reserved.
*/
/*
* Copyright (C) 2015-2017 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;
import java.io.OutputStream;
import java.io.Writer;
import java.util.concurrent.atomic.AtomicLong;
import com.unboundid.ldap.sdk.controls.PasswordExpiredControl;
import com.unboundid.ldap.sdk.controls.PasswordExpiringControl;
import com.unboundid.ldap.sdk.experimental.
DraftBeheraLDAPPasswordPolicy10ResponseControl;
import com.unboundid.util.Debug;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import static com.unboundid.ldap.sdk.LDAPMessages.*;
/**
* This class provides an {@link LDAPConnectionPoolHealthCheck} implementation
* that may be used to output a warning message about a password expiration that
* has occurred or is about to occur. It examines a bind result to see if it
* includes a {@link PasswordExpiringControl}, a {@link PasswordExpiredControl},
* or a {@link DraftBeheraLDAPPasswordPolicy10ResponseControl} that might
* indicate that the user's password is about to expire, has already expired, or
* is in a state that requires the user to change the password before they will
* be allowed to perform any other operation. In the event of a warning about
* an upcoming problem, the health check may write a message to a given
* {@code OutputStream} or {@code Writer}. In the event of a problem that will
* interfere with connection use, it will throw an exception to indicate that
* the connection is not valid.
*/
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class PasswordExpirationLDAPConnectionPoolHealthCheck
extends LDAPConnectionPoolHealthCheck
{
// The time that the last expiration warning message was written.
private final AtomicLong lastWarningTime = new AtomicLong(0L);
// The length of time in milliseconds that should elapse between warning
// messages about a potential upcoming problem.
private final Long millisBetweenRepeatWarnings;
// The output stream to which the expiration message will be written, if
// provided.
private final OutputStream outputStream;
// The writer to which the expiration message will be written, if provided.
private final Writer writer;
/**
* Creates a new instance of this health check that will throw an exception
* for any password policy-related warnings or errors encountered.
*/
public PasswordExpirationLDAPConnectionPoolHealthCheck()
{
this(null, null, null);
}
/**
* Creates a new instance of this health check that will write any password
* policy-related warning message to the provided {@code OutputStream}. It
* will only write the first warning and will suppress all subsequent
* warnings. It will throw an exception for any password policy-related
* errors encountered.
*
* @param outputStream The output stream to which a warning message should
* be written.
*/
public PasswordExpirationLDAPConnectionPoolHealthCheck(
final OutputStream outputStream)
{
this(outputStream, null, null);
}
/**
* Creates a new instance of this health check that will write any password
* policy-related warning message to the provided {@code Writer}. It will
* only write the first warning and will suppress all subsequent warnings. It
* will throw an exception for any password policy-related errors encountered.
*
* @param writer The writer to which a warning message should be written.
*/
public PasswordExpirationLDAPConnectionPoolHealthCheck(final Writer writer)
{
this(null, writer, null);
}
/**
* Creates a new instance of this health check that will write any password
* policy-related warning messages to the provided {@code OutputStream}. It
* may write or suppress some or all subsequent warnings. It will throw an
* exception for any password-policy related errors encountered.
*
* @param outputStream The output stream to which warning
* messages should be written.
* @param millisBetweenRepeatWarnings The minimum length of time in
* milliseconds that should be allowed to
* elapse between repeat warning
* messages. A value that is less than
* or equal to zero indicates that all
* warning messages should always be
* written. A positive value indicates
* that some warning messages may be
* suppressed if they are encountered too
* soon after writing a previous warning.
* A value of {@code null} indicates that
* only the first warning message should
* be written and all subsequent warnings
* should be suppressed.
*/
public PasswordExpirationLDAPConnectionPoolHealthCheck(
final OutputStream outputStream,
final Long millisBetweenRepeatWarnings)
{
this(outputStream, null, millisBetweenRepeatWarnings);
}
/**
* Creates a new instance of this health check that will write any password
* policy-related warning messages to the provided {@code OutputStream}. It
* may write or suppress some or all subsequent warnings. It will throw an
* exception for any password-policy related errors encountered.
*
* @param writer The writer to which warning messages
* should be written.
* @param millisBetweenRepeatWarnings The minimum length of time in
* milliseconds that should be allowed to
* elapse between repeat warning
* messages. A value that is less than
* or equal to zero indicates that all
* warning messages should always be
* written. A positive value indicates
* that some warning messages may be
* suppressed if they are encountered too
* soon after writing a previous warning.
* A value of {@code null} indicates that
* only the first warning message should
* be written and all subsequent warnings
* should be suppressed.
*/
public PasswordExpirationLDAPConnectionPoolHealthCheck(final Writer writer,
final Long millisBetweenRepeatWarnings)
{
this(null, writer, millisBetweenRepeatWarnings);
}
/**
* Creates a new instance of this health check that may behave in a variety of
* ways. All password policy-related errors will always result in an
* exception. If both the {@code outputStream} and {@code writer} arguments
* are {@code null}, then all password policy-related warnings will also
* result in exceptions. If either the {@code outputStream} or {@code writer}
* is non-{@code null}, then warning messages may be written to that target.
*
* @param outputStream The output stream to which warning
* messages should be written.
* @param writer The writer to which warning messages
* should be written.
* @param millisBetweenRepeatWarnings The minimum length of time in
* milliseconds that should be allowed to
* elapse between repeat warning
* messages. A value that is less than
* or equal to zero indicates that all
* warning messages should always be
* written. A positive value indicates
* that some warning messages may be
* suppressed if they are encountered too
* soon after writing a previous warning.
* A value of {@code null} indicates that
* only the first warning message should
* be written and all subsequent warnings
* should be suppressed.
*/
private PasswordExpirationLDAPConnectionPoolHealthCheck(
final OutputStream outputStream, final Writer writer,
final Long millisBetweenRepeatWarnings)
{
this.outputStream = outputStream;
this.writer = writer;
this.millisBetweenRepeatWarnings = millisBetweenRepeatWarnings;
}
/**
* {@inheritDoc}
*/
@Override()
public void ensureConnectionValidAfterAuthentication(
final LDAPConnection connection,
final BindResult bindResult)
throws LDAPException
{
// See if the bind result includes a password expired control. This will
// always result in an exception.
final PasswordExpiredControl expiredControl =
PasswordExpiredControl.get(bindResult);
if (expiredControl != null)
{
// NOTE: Some directory servers use this control for a dual purpose. If
// the bind result has a non-success result code, then it indicates that
// the user's password is expired in the traditional sense. However, if
// the bind result includes this control with a result code of success,
// then that will be taken to mean that the authentication was successful
// but that the user must change their password before they will be
// allowed to perform any other kind of operation. We'll throw an
// exception either way, but will use a different message for each
// situation.
if (bindResult.getResultCode() == ResultCode.SUCCESS)
{
throw new LDAPException(ResultCode.ADMIN_LIMIT_EXCEEDED,
ERR_PW_EXP_WITH_SUCCESS.get());
}
else
{
if (bindResult.getDiagnosticMessage() == null)
{
throw new LDAPException(bindResult.getResultCode(),
ERR_PW_EXP_WITH_FAILURE_NO_MSG.get());
}
else
{
throw new LDAPException(bindResult.getResultCode(),
ERR_PW_EXP_WITH_FAILURE_WITH_MSG.get(
bindResult.getDiagnosticMessage()));
}
}
}
// See if the bind result includes a password policy response control that
// indicates an error condition. If so, then we will always throw an
// exception as a result of that.
final DraftBeheraLDAPPasswordPolicy10ResponseControl pwPolicyControl =
DraftBeheraLDAPPasswordPolicy10ResponseControl.get(bindResult);
if ((pwPolicyControl != null) && (pwPolicyControl.getErrorType() != null))
{
final ResultCode resultCode;
if (bindResult.getResultCode() == ResultCode.SUCCESS)
{
resultCode = ResultCode.ADMIN_LIMIT_EXCEEDED;
}
else
{
resultCode = bindResult.getResultCode();
}
final String message;
if (bindResult.getDiagnosticMessage() == null)
{
message = ERR_PW_POLICY_ERROR_NO_MSG.get(
pwPolicyControl.getErrorType().toString());
}
else
{
message = ERR_PW_POLICY_ERROR_WITH_MSG.get(
pwPolicyControl.getErrorType().toString(),
bindResult.getDiagnosticMessage());
}
throw new LDAPException(resultCode, message);
}
// If we've gotten to this point, then we know that there can only possibly
// be a warning. If we know that we're going to suppress any subsequent
// warning, then there's no point in continuing.
if (millisBetweenRepeatWarnings == null)
{
if (! lastWarningTime.compareAndSet(0L, System.currentTimeMillis()))
{
return;
}
}
else if (millisBetweenRepeatWarnings > 0L)
{
final long millisSinceLastWarning =
System.currentTimeMillis() - lastWarningTime.get();
if (millisSinceLastWarning < millisBetweenRepeatWarnings)
{
return;
}
}
// If there was a password policy response control that didn't have an
// error condition but did have a warning condition, then handle that.
String message = null;
if ((pwPolicyControl != null) && (pwPolicyControl.getWarningType() != null))
{
switch (pwPolicyControl.getWarningType())
{
case TIME_BEFORE_EXPIRATION:
message = WARN_PW_EXPIRING.get(
StaticUtils.secondsToHumanReadableDuration(
pwPolicyControl.getWarningValue()));
break;
case GRACE_LOGINS_REMAINING:
message = WARN_PW_POLICY_GRACE_LOGIN.get(
pwPolicyControl.getWarningValue());
break;
}
}
// See if the bind result includes a password expiring control.
final PasswordExpiringControl expiringControl =
PasswordExpiringControl.get(bindResult);
if ((message == null) && (expiringControl != null))
{
message = WARN_PW_EXPIRING.get(
StaticUtils.secondsToHumanReadableDuration(
expiringControl.getSecondsUntilExpiration()));
}
if (message != null)
{
warn(message);
}
}
/**
* Handles the provided warning message as appropriate. It will be written to
* the output stream, to the error stream, or thrown as an exception.
*
* @param message The warning message to be handled.
*
* @throws LDAPException If the warning should be treated as an error.
*/
private void warn(final String message)
throws LDAPException
{
if (outputStream != null)
{
try
{
outputStream.write(StaticUtils.getBytes(message + StaticUtils.EOL));
outputStream.flush();
lastWarningTime.set(System.currentTimeMillis());
}
catch (final Exception e)
{
Debug.debugException(e);
}
}
else if (writer != null)
{
try
{
writer.write(message + StaticUtils.EOL);
writer.flush();
lastWarningTime.set(System.currentTimeMillis());
}
catch (final Exception e)
{
Debug.debugException(e);
}
}
else
{
lastWarningTime.set(System.currentTimeMillis());
throw new LDAPException(ResultCode.ADMIN_LIMIT_EXCEEDED, message);
}
}
/**
* {@inheritDoc}
*/
@Override()
public void toString(final StringBuilder buffer)
{
buffer.append("WarnAboutPasswordExpirationLDAPConnectionPoolHealthCheck(");
buffer.append("throwExceptionOnWarning=");
buffer.append((outputStream == null) && (writer == null));
if (millisBetweenRepeatWarnings == null)
{
buffer.append(", suppressSubsequentWarnings=true");
}
else if (millisBetweenRepeatWarnings > 0L)
{
buffer.append(", millisBetweenRepeatWarnings=");
buffer.append(millisBetweenRepeatWarnings);
}
else
{
buffer.append(", suppressSubsequentWarnings=false");
}
buffer.append(')');
}
}
