com.unboundid.ldap.sdk.unboundidds.tools.ToolUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of unboundid-ldapsdk Show documentation
Show all versions of unboundid-ldapsdk Show documentation
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 Standard Edition of the LDAP SDK, which is a
complete, general-purpose library for communicating with LDAPv3 directory
servers.
/*
* Copyright 2018-2021 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright 2018-2021 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) 2018-2021 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.unboundidds.tools;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.security.GeneralSecurityException;
import java.security.InvalidKeyException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.zip.GZIPInputStream;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.AggregateInputStream;
import com.unboundid.util.ByteStringBuffer;
import com.unboundid.util.Debug;
import com.unboundid.util.NotNull;
import com.unboundid.util.Nullable;
import com.unboundid.util.ObjectPair;
import com.unboundid.util.PassphraseEncryptedInputStream;
import com.unboundid.util.PassphraseEncryptedOutputStream;
import com.unboundid.util.PassphraseEncryptedStreamHeader;
import com.unboundid.util.PasswordReader;
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.tools.ToolMessages.*;
/**
* This class provides a number of utility methods primarily intended for use
* with command-line tools.
*
*
* NOTE: This class, and other classes within the
* {@code com.unboundid.ldap.sdk.unboundidds} package structure, are only
* supported for use against Ping Identity, UnboundID, and
* Nokia/Alcatel-Lucent 8661 server products. These classes provide support
* for proprietary functionality or for external specifications that are not
* considered stable or mature enough to be guaranteed to work in an
* interoperable way with other types of LDAP servers.
*
*/
@ThreadSafety(level= ThreadSafetyLevel.NOT_THREADSAFE)
public final class ToolUtils
{
/**
* The column at which long lines should be wrapped.
*/
private static final int WRAP_COLUMN = StaticUtils.TERMINAL_WIDTH_COLUMNS - 1;
/**
* A handle to a method that can be used to get the passphrase for an
* encryption settings definition ID if the server code is available. We have
* to call this via reflection because the server code may not be available.
*/
@Nullable private static final Method
GET_PASSPHRASE_FOR_ENCRYPTION_SETTINGS_ID_METHOD;
static
{
Method m = null;
try
{
final Class serverStaticUtilsClass = Class.forName(
"com.unboundid.directory.server.util.StaticUtils");
m = serverStaticUtilsClass.getMethod(
"getPassphraseForEncryptionSettingsID", String.class,
PrintStream.class, PrintStream.class);
}
catch (final Exception e)
{
// This is fine. It probably just means that the server code isn't
// available.
Debug.debugException(Level.FINEST, e);
}
GET_PASSPHRASE_FOR_ENCRYPTION_SETTINGS_ID_METHOD = m;
}
/**
* Prevent this utility class from being instantiated.
*/
private ToolUtils()
{
// No implementation is required.
}
/**
* Reads an encryption passphrase from the specified file. The file must
* contain exactly one line, which must not be empty, and must be comprised
* entirely of the encryption passphrase.
*
* @param f The file from which the passphrase should be read. It must not
* be {@code null}.
*
* @return The encryption passphrase read from the specified file.
*
* @throws LDAPException If a problem occurs while attempting to read the
* encryption passphrase.
*/
@NotNull()
public static String readEncryptionPassphraseFromFile(@NotNull final File f)
throws LDAPException
{
Validator.ensureTrue((f != null),
"ToolUtils.readEncryptionPassphraseFromFile.f must not be null.");
if (! f.exists())
{
throw new LDAPException(ResultCode.PARAM_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_MISSING.get(f.getAbsolutePath()));
}
if (! f.isFile())
{
throw new LDAPException(ResultCode.PARAM_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_NOT_FILE.get(f.getAbsolutePath()));
}
try (FileReader fileReader = new FileReader(f);
BufferedReader bufferedReader = new BufferedReader(fileReader))
{
final String encryptionPassphrase = bufferedReader.readLine();
if (encryptionPassphrase == null)
{
throw new LDAPException(ResultCode.PARAM_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_EMPTY.get(f.getAbsolutePath()));
}
else if (bufferedReader.readLine() != null)
{
throw new LDAPException(ResultCode.PARAM_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_MULTIPLE_LINES.get(
f.getAbsolutePath()));
}
else if (encryptionPassphrase.isEmpty())
{
throw new LDAPException(ResultCode.PARAM_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_EMPTY.get(f.getAbsolutePath()));
}
return encryptionPassphrase;
}
catch (final LDAPException e)
{
Debug.debugException(e);
throw e;
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPException(ResultCode.LOCAL_ERROR,
ERR_TOOL_UTILS_ENCRYPTION_PW_FILE_READ_ERROR.get(
f.getAbsolutePath(), StaticUtils.getExceptionMessage(e)));
}
}
/**
* Interactively prompts the user for an encryption passphrase.
*
* @param allowEmpty Indicates whether the encryption passphrase is allowed
* to be empty. If this is {@code false}, then the user
* will be re-prompted for the passphrase if the value
* they enter is empty.
* @param confirm Indicates whether the user will asked to confirm the
* passphrase. If this is {@code true}, then the user
* will have to enter the same passphrase twice. If this
* is {@code false}, then the user will only be prompted
* once.
* @param out The {@code PrintStream} that will be used for standard
* output. It must not be {@code null}.
* @param err The {@code PrintStream} that will be used for standard
* error. It must not be {@code null}.
*
* @return The encryption passphrase provided by the user.
*
* @throws LDAPException If a problem is encountered while trying to obtain
* the passphrase from the user.
*/
@NotNull()
public static String promptForEncryptionPassphrase(final boolean allowEmpty,
final boolean confirm,
@NotNull final PrintStream out,
@NotNull final PrintStream err)
throws LDAPException
{
return promptForEncryptionPassphrase(allowEmpty, confirm,
INFO_TOOL_UTILS_ENCRYPTION_PW_PROMPT.get(),
INFO_TOOL_UTILS_ENCRYPTION_PW_CONFIRM.get(), out, err);
}
/**
* Interactively prompts the user for an encryption passphrase.
*
* @param allowEmpty Indicates whether the encryption passphrase is
* allowed to be empty. If this is {@code false}, then
* the user will be re-prompted for the passphrase if
* the value they enter is empty.
* @param confirm Indicates whether the user will asked to confirm the
* passphrase. If this is {@code true}, then the user
* will have to enter the same passphrase twice. If
* this is {@code false}, then the user will only be
* prompted once.
* @param initialPrompt The initial prompt that will be presented to the
* user. It must not be {@code null} or empty.
* @param confirmPrompt The prompt that will be presented to the user when
* asked to confirm the passphrase. It may be
* {@code null} only if {@code confirm} is
* {@code false}.
* @param out The {@code PrintStream} that will be used for
* standard output. It must not be {@code null}.
* @param err The {@code PrintStream} that will be used for
* standard error. It must not be {@code null}.
*
* @return The encryption passphrase provided by the user.
*
* @throws LDAPException If a problem is encountered while trying to obtain
* the passphrase from the user.
*/
@NotNull()
public static String promptForEncryptionPassphrase(final boolean allowEmpty,
final boolean confirm,
@NotNull final CharSequence initialPrompt,
@Nullable final CharSequence confirmPrompt,
@NotNull final PrintStream out,
@NotNull final PrintStream err)
throws LDAPException
{
Validator.ensureTrue(
((initialPrompt != null) && (initialPrompt.length() > 0)),
"TestUtils.promptForEncryptionPassphrase.initialPrompt must not be " +
"null or empty.");
Validator.ensureTrue(
((! confirm) ||
((confirmPrompt != null) && (confirmPrompt.length() > 0))),
"TestUtils.promptForEncryptionPassphrase.confirmPrompt must not be " +
"null or empty when confirm is true.");
Validator.ensureTrue((out != null),
"ToolUtils.promptForEncryptionPassphrase.out must not be null");
Validator.ensureTrue((err != null),
"ToolUtils.promptForEncryptionPassphrase.err must not be null");
while (true)
{
char[] passphraseChars = null;
char[] confirmChars = null;
try
{
wrapPrompt(initialPrompt, true, out);
passphraseChars = PasswordReader.readPasswordChars();
if ((passphraseChars == null) || (passphraseChars.length == 0))
{
if (allowEmpty)
{
passphraseChars = StaticUtils.NO_CHARS;
}
else
{
wrap(ERR_TOOL_UTILS_ENCRYPTION_PW_EMPTY.get(), err);
err.println();
continue;
}
}
if (confirm)
{
wrapPrompt(confirmPrompt, true, out);
confirmChars = PasswordReader.readPasswordChars();
if ((confirmChars == null) ||
(! Arrays.equals(passphraseChars, confirmChars)))
{
wrap(ERR_TOOL_UTILS_ENCRYPTION_PW_MISMATCH.get(), err);
err.println();
continue;
}
}
return new String(passphraseChars);
}
finally
{
if (passphraseChars != null)
{
Arrays.fill(passphraseChars, '\u0000');
}
if (confirmChars != null)
{
Arrays.fill(confirmChars, '\u0000');
}
}
}
}
/**
* Writes a wrapped version of the provided message to the given stream.
*
* @param message The message to be written. If it is {@code null} or
* empty, then an empty line will be printed.
* @param out The {@code PrintStream} that should be used to write the
* provided message.
*/
public static void wrap(@NotNull final CharSequence message,
@NotNull final PrintStream out)
{
Validator.ensureTrue((out != null), "ToolUtils.wrap.out must not be null.");
if ((message == null) || (message.length() == 0))
{
out.println();
return;
}
for (final String line :
StaticUtils.wrapLine(message.toString(), WRAP_COLUMN))
{
out.println(line);
}
}
/**
* Wraps the provided prompt such that every line except the last will be
* followed by a newline, but the last line will not be followed by a newline.
*
* @param prompt The prompt to be wrapped. It must not be
* {@code null} or empty.
* @param ensureTrailingSpace Indicates whether to ensure that there is a
* trailing space after the end of the prompt.
* @param out The {@code PrintStream} to which the prompt
* should be written. It must not be
* {@code null}.
*/
public static void wrapPrompt(@NotNull final CharSequence prompt,
final boolean ensureTrailingSpace,
@NotNull final PrintStream out)
{
Validator.ensureTrue(((prompt != null) && (prompt.length() > 0)),
"ToolUtils.wrapPrompt.prompt must not be null or empty.");
Validator.ensureTrue((out != null),
"ToolUtils.wrapPrompt.out must not be null.");
String promptString = prompt.toString();
if (ensureTrailingSpace && (! promptString.endsWith(" ")))
{
promptString += ' ';
}
final List lines = StaticUtils.wrapLine(promptString, WRAP_COLUMN);
final Iterator iterator = lines.iterator();
while (iterator.hasNext())
{
final String line = iterator.next();
if (iterator.hasNext())
{
out.println(line);
}
else
{
out.print(line);
}
}
}
/**
* Retrieves an input stream that can be used to read data from the specified
* list of files. It will handle the possibility that any or all of the LDIF
* files are encrypted and/or compressed.
*
* @param ldifFiles The list of LDIF files from which the data
* is to be read. It must not be {@code null}
* or empty.
* @param encryptionPassphrase The passphrase that should be used to access
* encrypted LDIF files. It may be {@code null}
* if the user should be interactively prompted
* for the passphrase if any of the files is
* encrypted.
* @param out The print stream to use for standard output.
* It must not be {@code null}.
* @param err The print stream to use for standard error.
* It must not be {@code null}.
*
* @return An {@code ObjectPair} whose first element is an input stream that
* can be used to read data from the specified list of files, and
* whose second element is a possibly-{@code null} passphrase that
* is used to encrypt the input data.
*
* @throws IOException If a problem is encountered while attempting to get
* the input stream for reading the data.
*/
@NotNull()
public static ObjectPair getInputStreamForLDIFFiles(
@NotNull final List ldifFiles,
@Nullable final String encryptionPassphrase,
@NotNull final PrintStream out,
@NotNull final PrintStream err)
throws IOException
{
Validator.ensureTrue(((ldifFiles != null) && (! ldifFiles.isEmpty())),
"ToolUtils.getInputStreamForLDIFFiles.ldifFiles must not be null or " +
"empty.");
Validator.ensureTrue((out != null),
"ToolUtils.getInputStreamForLDIFFiles.out must not be null");
Validator.ensureTrue((err != null),
"ToolUtils.getInputStreamForLDIFFiles.err must not be null");
boolean createdSuccessfully = false;
final ArrayList inputStreams =
new ArrayList<>(ldifFiles.size() * 2);
try
{
byte[] twoEOLs = null;
String passphrase = encryptionPassphrase;
for (final File f : ldifFiles)
{
if (! inputStreams.isEmpty())
{
if (twoEOLs == null)
{
final ByteStringBuffer buffer = new ByteStringBuffer(4);
buffer.append(StaticUtils.EOL_BYTES);
buffer.append(StaticUtils.EOL_BYTES);
twoEOLs = buffer.toByteArray();
}
inputStreams.add(new ByteArrayInputStream(twoEOLs));
}
InputStream inputStream = new FileInputStream(f);
try
{
final ObjectPair p =
getPossiblyPassphraseEncryptedInputStream(
inputStream, passphrase, (encryptionPassphrase == null),
INFO_TOOL_UTILS_ENCRYPTED_LDIF_FILE_PW_PROMPT.get(
f.getPath()),
ERR_TOOL_UTILS_ENCRYPTED_LDIF_FILE_WRONG_PW.get(), out,
err);
inputStream = p.getFirst();
if ((p.getSecond() != null) && (passphrase == null))
{
passphrase = p.getSecond();
}
}
catch (final GeneralSecurityException e)
{
Debug.debugException(e);
inputStream.close();
throw new IOException(
ERR_TOOL_UTILS_ENCRYPTED_LDIF_FILE_CANNOT_DECRYPT.get(
f.getPath(), StaticUtils.getExceptionMessage(e)),
e);
}
inputStream = getPossiblyGZIPCompressedInputStream(inputStream);
inputStreams.add(inputStream);
}
createdSuccessfully = true;
if (inputStreams.size() == 1)
{
return new ObjectPair<>(inputStreams.get(0), passphrase);
}
else
{
return new ObjectPair(
new AggregateInputStream(inputStreams), passphrase);
}
}
finally
{
if (! createdSuccessfully)
{
for (final InputStream inputStream : inputStreams)
{
try
{
inputStream.close();
}
catch (final IOException e)
{
Debug.debugException(e);
}
}
}
}
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been GZIP-compressed. If
* the provided input stream does not appear to contain GZIP-compressed data,
* then the returned stream will permit reading the data from the provided
* stream without any alteration.
*
* The determination will be made by looking to see if the first two bytes
* read from the provided input stream are 0x1F and 0x8B, respectively (which
* is the GZIP magic header). To avoid false positives, this method should
* only be used if it is known that if the input stream does not contain
* compressed data, then it will not start with that two-byte sequence. This
* method should always be safe to use if the data to be read is text. If the
* data may be binary and that binary data may happen to start with 0x1F 0x8B,
* then this method should not be used.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream The input stream from which the data is to be read.
*
* @return A {@code GZIPInputStream} that wraps the provided input stream if
* the stream appears to contain GZIP-compressed data, or the
* provided input stream (potentially wrapped in a
* {@code BufferedInputStream}) if the provided stream does not
* appear to contain GZIP-compressed data.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains GZIP-compressed
* data.
*/
@NotNull()
public static InputStream getPossiblyGZIPCompressedInputStream(
@NotNull final InputStream inputStream)
throws IOException
{
Validator.ensureTrue((inputStream != null),
"StaticUtils.getPossiblyGZIPCompressedInputStream.inputStream must " +
"not be null.");
// Mark the input stream so that we can peek at data from the beginning of
// the stream.
final InputStream markableInputStream;
if (inputStream.markSupported())
{
markableInputStream = inputStream;
}
else
{
markableInputStream = new BufferedInputStream(inputStream);
}
markableInputStream.mark(2);
// Check to see if the file starts with the GZIP magic header. Whether it
// does or not, reset the stream so that we can read it from the beginning.
final boolean isCompressed;
try
{
isCompressed = ((markableInputStream.read() == 0x1F) &&
(markableInputStream.read() == 0x8B));
}
finally
{
markableInputStream.reset();
}
// If the stream starts with the GZIP magic header, then assume it's
// GZIP-compressed. Otherwise, assume it's not.
if (isCompressed)
{
return new GZIPInputStream(markableInputStream);
}
else
{
return markableInputStream;
}
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been encrypted with a
* {@link PassphraseEncryptedOutputStream} using a key from a Ping Identity
* or Nokia/Alcatel-Lucent 8661 Directory Server's encryption settings
* database. This method will throw an exception rather than interactively
* prompting for a passphrase if the content is encrypted but the encryption
* key is not readily available.
*
* The determination will be made by looking to see if the input stream starts
* with a valid {@link PassphraseEncryptedStreamHeader}. Because of the
* complex nature of that header, it is highly unlikely that the input stream
* will just happen to start with a valid header if the stream does not
* actually contain encrypted data.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream The input stream from which the data is to be read.
* It must not be {@code null}.
*
* @return The resulting input stream that may be used to read from the
* given input stream. If the data was encrypted, then the returned
* stream will be a {@link PassphraseEncryptedInputStream} that may
* be used to read decrypted data from it. If the data was not
* encrypted, then the original stream (possibly wrapped by a
* {@code BufferedInputStream} will be returned.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains
* passphrase-encrypted data.
*
* @throws GeneralSecurityException If a problem is encountered while
* attempting to prepare to decrypt data
* read from the input stream, or if the
* stream is encrypted with a key that is
* not readily available.
*/
@NotNull()
public static InputStream getPossiblyPassphraseEncryptedInputStream(
@NotNull final InputStream inputStream)
throws IOException, GeneralSecurityException
{
final ObjectPair pair =
getPossiblyPassphraseEncryptedInputStream(inputStream,
Collections.emptyList(), false, false, "", "", System.out,
System.err);
return pair.getFirst();
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been encrypted with a
* {@link PassphraseEncryptedOutputStream}. If the provided input stream does
* not appear to contain passphrase-encrypted data, then the returned stream
* will permit reading the data from the provided stream without any
* alteration.
*
* The determination will be made by looking to see if the input stream starts
* with a valid {@link PassphraseEncryptedStreamHeader}. Because of the
* complex nature of that header, it is highly unlikely that the input stream
* will just happen to start with a valid header if the stream does not
* actually contain encrypted data.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream The input stream from which the data
* is to be read. It must not be
* {@code null}.
* @param potentialPassphrase A potential passphrase that may have
* been used to encrypt the data. It
* may be {@code null} if the passphrase
* should only be obtained via
* interactive prompting, or if the
* data was encrypted with a server-side
* encryption settings definition. If
* the passphrase is not {@code null} but
* is incorrect, then the user may be
* interactively prompted for the correct
* passphrase.
* @param promptOnIncorrectPassphrase Indicates whether the user should be
* interactively prompted for the correct
* passphrase if the provided passphrase
* is non-{@code null} and is also
* incorrect.
* @param passphrasePrompt The prompt that will be presented to
* the user if the input stream does
* contain encrypted data and the
* passphrase needs to be interactively
* requested from the user. It must not
* be {@code null} or empty.
* @param incorrectPassphraseError The error message that will be
* presented to the user if the entered
* passphrase is not correct. It must
* not be {@code null} or empty.
* @param standardOutput The {@code PrintStream} to use to
* write to standard output while
* interactively prompting for the
* passphrase. It must not be
* {@code null}.
* @param standardError The {@code PrintStream} to use to
* write to standard error while
* interactively prompting for the
* passphrase. It must not be
* {@code null}.
*
* @return An {@code ObjectPair} that combines the resulting input stream
* with the associated encryption passphrase. If the provided input
* stream is encrypted, then the returned input stream element will
* be a {@code PassphraseEncryptedInputStream} and the returned
* passphrase element will be non-{@code null}. If the provided
* input stream is not encrypted, then the returned input stream
* element will be the provided input stream (potentially wrapped in
* a {@code BufferedInputStream}), and the returned passphrase
* element will be {@code null}.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains
* passphrase-encrypted data.
*
* @throws InvalidKeyException If the provided passphrase is incorrect and
* the user should not be interactively prompted
* for the correct passphrase.
*
* @throws GeneralSecurityException If a problem is encountered while
* attempting to prepare to decrypt data
* read from the input stream.
*/
@NotNull()
public static ObjectPair
getPossiblyPassphraseEncryptedInputStream(
@NotNull final InputStream inputStream,
@Nullable final String potentialPassphrase,
final boolean promptOnIncorrectPassphrase,
@NotNull final CharSequence passphrasePrompt,
@NotNull final CharSequence incorrectPassphraseError,
@NotNull final PrintStream standardOutput,
@NotNull final PrintStream standardError)
throws IOException, InvalidKeyException, GeneralSecurityException
{
final Collection potentialPassphrases;
if (potentialPassphrase == null)
{
potentialPassphrases = Collections.emptySet();
}
else
{
potentialPassphrases =
Collections.singleton(potentialPassphrase.toCharArray());
}
final ObjectPair p =
getPossiblyPassphraseEncryptedInputStream(inputStream,
potentialPassphrases, promptOnIncorrectPassphrase,
passphrasePrompt, incorrectPassphraseError, standardOutput,
standardError);
if (p.getSecond() == null)
{
return new ObjectPair<>(p.getFirst(), null);
}
else
{
return new ObjectPair<>(p.getFirst(), new String(p.getSecond()));
}
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been encrypted with a
* {@link PassphraseEncryptedOutputStream}. If the provided input stream does
* not appear to contain passphrase-encrypted data, then the returned stream
* will permit reading the data from the provided stream without any
* alteration.
*
* The determination will be made by looking to see if the input stream starts
* with a valid {@link PassphraseEncryptedStreamHeader}. Because of the
* complex nature of that header, it is highly unlikely that the input stream
* will just happen to start with a valid header if the stream does not
* actually contain encrypted data.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream The input stream from which the data
* is to be read. It must not be
* {@code null}.
* @param potentialPassphrase A potential passphrase that may have
* been used to encrypt the data. It
* may be {@code null} if the passphrase
* should only be obtained via
* interactive prompting, or if the
* data was encrypted with a server-side
* encryption settings definition. If
* the passphrase is not {@code null} but
* is incorrect, then the user may be
* interactively prompted for the correct
* passphrase.
* @param promptOnIncorrectPassphrase Indicates whether the user should be
* interactively prompted for the correct
* passphrase if the provided passphrase
* is non-{@code null} and is also
* incorrect.
* @param passphrasePrompt The prompt that will be presented to
* the user if the input stream does
* contain encrypted data and the
* passphrase needs to be interactively
* requested from the user. It must not
* be {@code null} or empty.
* @param incorrectPassphraseError The error message that will be
* presented to the user if the entered
* passphrase is not correct. It must
* not be {@code null} or empty.
* @param standardOutput The {@code PrintStream} to use to
* write to standard output while
* interactively prompting for the
* passphrase. It must not be
* {@code null}.
* @param standardError The {@code PrintStream} to use to
* write to standard error while
* interactively prompting for the
* passphrase. It must not be
* {@code null}.
*
* @return An {@code ObjectPair} that combines the resulting input stream
* with the associated encryption passphrase. If the provided input
* stream is encrypted, then the returned input stream element will
* be a {@code PassphraseEncryptedInputStream} and the returned
* passphrase element will be non-{@code null}. If the provided
* input stream is not encrypted, then the returned input stream
* element will be the provided input stream (potentially wrapped in
* a {@code BufferedInputStream}), and the returned passphrase
* element will be {@code null}.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains
* passphrase-encrypted data.
*
* @throws InvalidKeyException If the provided passphrase is incorrect and
* the user should not be interactively prompted
* for the correct passphrase.
*
* @throws GeneralSecurityException If a problem is encountered while
* attempting to prepare to decrypt data
* read from the input stream.
*/
@NotNull()
public static ObjectPair
getPossiblyPassphraseEncryptedInputStream(
@NotNull final InputStream inputStream,
@Nullable final char[] potentialPassphrase,
final boolean promptOnIncorrectPassphrase,
@NotNull final CharSequence passphrasePrompt,
@NotNull final CharSequence incorrectPassphraseError,
@NotNull final PrintStream standardOutput,
@NotNull final PrintStream standardError)
throws IOException, InvalidKeyException, GeneralSecurityException
{
final Collection potentialPassphrases;
if (potentialPassphrase == null)
{
potentialPassphrases = Collections.emptySet();
}
else
{
potentialPassphrases =
Collections.singleton(potentialPassphrase);
}
final ObjectPair p =
getPossiblyPassphraseEncryptedInputStream(inputStream,
potentialPassphrases, promptOnIncorrectPassphrase,
passphrasePrompt, incorrectPassphraseError, standardOutput,
standardError);
if (p.getSecond() == null)
{
return new ObjectPair<>(p.getFirst(), null);
}
else
{
return new ObjectPair<>(p.getFirst(), p.getSecond());
}
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been encrypted with a
* {@link PassphraseEncryptedOutputStream}. If the provided input stream does
* not appear to contain passphrase-encrypted data, then the returned stream
* will permit reading the data from the provided stream without any
* alteration.
*
* The determination will be made by looking to see if the input stream starts
* with a valid {@link PassphraseEncryptedStreamHeader}. Because of the
* complex nature of that header, it is highly unlikely that the input stream
* will just happen to start with a valid header if the stream does not
* actually contain encrypted data.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream
* The input stream from which the data is to be read. It must
* not be {@code null}.
* @param potentialPassphrases
* A collection of potential passphrases that may have been used
* to encrypt the data. It may be {@code null} or empty if the
* passphrase should only be obtained via interactive prompting,
* or if the data was encrypted with a server-side encryption
* settings definition. If none of the provided passphrases are
* correct, then the user may still be interactively prompted
* for the correct passphrase based on the value of the
* {@code promptOnIncorrectPassphrase} argument.
* @param promptOnIncorrectPassphrase
* Indicates whether the user should be interactively prompted
* for the correct passphrase if the set of potential passphrases
* is non-{@code null} and non-empty, but none of the passphrases
* were correct.
* @param passphrasePrompt
* The prompt that will be presented to the user if the input
* stream does contain encrypted data and the passphrase needs to
* be interactively requested from the user. It must not be
* {@code null} or empty.
* @param incorrectPassphraseError
* The error message that will be presented to the user if the
* entered passphrase is not correct. It must not be
* {@code null} or empty.
* @param standardOutput
* The {@code PrintStream} to use to write to standard output
* while interactively prompting for the passphrase. It must not
* be {@code null}.
* @param standardError
* The {@code PrintStream} to use to write to standard error
* while interactively prompting for the passphrase. It must not
* be {@code null}.
*
* @return An {@code ObjectPair} that combines the resulting input stream
* with the associated encryption passphrase. If the provided input
* stream is encrypted, then the returned input stream element will
* be a {@code PassphraseEncryptedInputStream} and the returned
* passphrase element will be non-{@code null}. If the provided
* input stream is not encrypted, then the returned input stream
* element will be the provided input stream (potentially wrapped in
* a {@code BufferedInputStream}), and the returned passphrase
* element will be {@code null}.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains
* passphrase-encrypted data.
*
* @throws InvalidKeyException If the provided passphrase is incorrect and
* the user should not be interactively prompted
* for the correct passphrase.
*
* @throws GeneralSecurityException If a problem is encountered while
* attempting to prepare to decrypt data
* read from the input stream.
*/
@NotNull()
public static ObjectPair
getPossiblyPassphraseEncryptedInputStream(
@NotNull final InputStream inputStream,
@Nullable final Collection potentialPassphrases,
final boolean promptOnIncorrectPassphrase,
@NotNull final CharSequence passphrasePrompt,
@NotNull final CharSequence incorrectPassphraseError,
@NotNull final PrintStream standardOutput,
@NotNull final PrintStream standardError)
throws IOException, InvalidKeyException, GeneralSecurityException
{
return getPossiblyPassphraseEncryptedInputStream(inputStream,
potentialPassphrases, promptOnIncorrectPassphrase, true,
passphrasePrompt, incorrectPassphraseError, standardOutput,
standardError);
}
/**
* Retrieves an {@code InputStream} that can be used to read data from the
* provided input stream that may have potentially been encrypted with a
* {@link PassphraseEncryptedOutputStream}. If the provided input stream does
* not appear to contain passphrase-encrypted data, then the returned stream
* will permit reading the data from the provided stream without any
* alteration.
*
* The determination will be made by looking to see if the input stream starts
* with a valid {@link PassphraseEncryptedStreamHeader}. Because of the
* complex nature of that header, it is highly unlikely that the input stream
* will just happen to start with a valid header if the stream does not
* actually contain encrypted data.
*
* The input stream's {@code mark} and {@code reset} methods will be used to
* permit peeking at the data at the head of the input stream. If the
* provided stream does not support the use of those methods, then it will be
* wrapped in a {@code BufferedInputStream}, which does support them.
*
* @param inputStream
* The input stream from which the data is to be read. It must
* not be {@code null}.
* @param potentialPassphrases
* A collection of potential passphrases that may have been used
* to encrypt the data. It may be {@code null} or empty if the
* passphrase should only be obtained via interactive prompting,
* or if the data was encrypted with a server-side encryption
* settings definition. If none of the provided passphrases are
* correct, then the user may still be interactively prompted
* for the correct passphrase based on the value of the
* {@code promptOnIncorrectPassphrase} argument.
* @param promptOnIncorrectPassphrase
* Indicates whether the user should be interactively prompted
* for the correct passphrase if the set of potential passphrases
* is non-{@code null} and non-empty, but none of the passphrases
* were correct.
* @param promptOnUnavailablePassphrase
* Indicates whether the user should be interactively prompted
* for the correct passphrase if the input stream is encrypted,
* the key cannot be automatically obtained from a server-side
* encryption settings definition, and no potential passphrases
* were provided. If this is {@code false}, then an exception
* will be thrown if the data is encrypted with a key that is
* not available.
* @param passphrasePrompt
* The prompt that will be presented to the user if the input
* stream does contain encrypted data and the passphrase needs to
* be interactively requested from the user. It must not be
* {@code null} or empty.
* @param incorrectPassphraseError
* The error message that will be presented to the user if the
* entered passphrase is not correct. It must not be
* {@code null} or empty.
* @param standardOutput
* The {@code PrintStream} to use to write to standard output
* while interactively prompting for the passphrase. It must not
* be {@code null}.
* @param standardError
* The {@code PrintStream} to use to write to standard error
* while interactively prompting for the passphrase. It must not
* be {@code null}.
*
* @return An {@code ObjectPair} that combines the resulting input stream
* with the associated encryption passphrase. If the provided input
* stream is encrypted, then the returned input stream element will
* be a {@code PassphraseEncryptedInputStream} and the returned
* passphrase element will be non-{@code null}. If the provided
* input stream is not encrypted, then the returned input stream
* element will be the provided input stream (potentially wrapped in
* a {@code BufferedInputStream}), and the returned passphrase
* element will be {@code null}.
*
* @throws IOException If a problem is encountered while attempting to
* determine whether the stream contains
* passphrase-encrypted data.
*
* @throws InvalidKeyException If the provided passphrase is incorrect and
* the user should not be interactively prompted
* for the correct passphrase.
*
* @throws GeneralSecurityException If a problem is encountered while
* attempting to prepare to decrypt data
* read from the input stream.
*/
@NotNull()
private static ObjectPair
getPossiblyPassphraseEncryptedInputStream(
@NotNull final InputStream inputStream,
@Nullable final Collection potentialPassphrases,
final boolean promptOnIncorrectPassphrase,
final boolean promptOnUnavailablePassphrase,
@Nullable final CharSequence passphrasePrompt,
@Nullable final CharSequence incorrectPassphraseError,
@Nullable final PrintStream standardOutput,
@Nullable final PrintStream standardError)
throws IOException, InvalidKeyException, GeneralSecurityException
{
Validator.ensureTrue((inputStream != null),
"StaticUtils.getPossiblyPassphraseEncryptedInputStream.inputStream " +
"must not be null.");
Validator.ensureTrue(
(((passphrasePrompt != null) && (passphrasePrompt.length() > 0)) ||
(! promptOnUnavailablePassphrase)),
"StaticUtils.getPossiblyPassphraseEncryptedInputStream." +
"passphrasePrompt must not be null or empty.");
Validator.ensureTrue(
(((incorrectPassphraseError != null) &&
(incorrectPassphraseError.length() > 0)) ||
(! promptOnUnavailablePassphrase)),
"StaticUtils.getPossiblyPassphraseEncryptedInputStream." +
"incorrectPassphraseError must not be null or empty.");
Validator.ensureTrue((standardOutput!= null),
"StaticUtils.getPossiblyPassphraseEncryptedInputStream." +
"standardOutput must not be null.");
Validator.ensureTrue((standardError!= null),
"StaticUtils.getPossiblyPassphraseEncryptedInputStream." +
"standardError must not be null.");
// Mark the input stream so that we can peek at data from the beginning of
// the stream.
final InputStream markableInputStream;
if (inputStream.markSupported())
{
markableInputStream = inputStream;
}
else
{
markableInputStream = new BufferedInputStream(inputStream);
}
markableInputStream.mark(1024);
// Try to read a passphrase-encrypted stream header from the beginning of
// the stream. Just decode the header, but don't attempt to make it usable
// for encryption or decryption.
final PassphraseEncryptedStreamHeader streamHeaderShell;
try
{
streamHeaderShell = PassphraseEncryptedStreamHeader.readFrom(
markableInputStream, null);
}
catch (final LDAPException e)
{
// This is fine. It just means that the stream doesn't contain encrypted
// data. In that case, reset the stream and return it so that the
// unencrypted data can be read.
Debug.debugException(Level.FINEST, e);
markableInputStream.reset();
return new ObjectPair<>(markableInputStream, null);
}
// If the header includes a key identifier, and if the server code is
// available, then see if we can get a passphrase for the corresponding
// encryption settings definition ID.
if ((streamHeaderShell.getKeyIdentifier() != null) &&
(GET_PASSPHRASE_FOR_ENCRYPTION_SETTINGS_ID_METHOD != null))
{
try
{
final Object passphraseObject =
GET_PASSPHRASE_FOR_ENCRYPTION_SETTINGS_ID_METHOD.invoke(null,
streamHeaderShell.getKeyIdentifier(), standardOutput,
standardError);
if ((passphraseObject != null) && (passphraseObject instanceof String))
{
final char[] passphraseChars =
((String) passphraseObject).toCharArray();
final PassphraseEncryptedStreamHeader validStreamHeader =
PassphraseEncryptedStreamHeader.decode(
streamHeaderShell.getEncodedHeader(),
passphraseChars);
return new ObjectPair(
new PassphraseEncryptedInputStream(markableInputStream,
validStreamHeader),
passphraseChars);
}
}
catch (final Exception e)
{
// This means that either an error occurred while trying to get the
// passphrase, or the passphrase we got was incorrect. That's fine.
// We'll just continue on to prompt for the passphrase.
Debug.debugException(e);
}
}
// If any potential passphrases were provided, then see if any of them is
// correct.
final boolean potentialPassphrasesProvided =
((potentialPassphrases != null) && (! potentialPassphrases.isEmpty()));
if (potentialPassphrasesProvided)
{
final Iterator passphraseIterator =
potentialPassphrases.iterator();
while (passphraseIterator.hasNext())
{
try
{
final char[] passphraseChars = passphraseIterator.next();
final PassphraseEncryptedStreamHeader validStreamHeader =
PassphraseEncryptedStreamHeader.decode(
streamHeaderShell.getEncodedHeader(),
passphraseChars);
return new ObjectPair(
new PassphraseEncryptedInputStream(markableInputStream,
validStreamHeader),
passphraseChars);
}
catch (final InvalidKeyException e)
{
// The provided passphrase is not correct. That's fine. We'll just
// prompt for the correct one.
Debug.debugException(e);
if ((! promptOnIncorrectPassphrase) &&
(! passphraseIterator.hasNext()))
{
throw e;
}
}
catch (final GeneralSecurityException e)
{
Debug.debugException(e);
if (! passphraseIterator.hasNext())
{
throw e;
}
}
catch (final LDAPException e)
{
// This should never happen, since we were previously able to decode
// the header. Just treat it like a GeneralSecurityException.
Debug.debugException(e);
if (! passphraseIterator.hasNext())
{
throw new GeneralSecurityException(e.getMessage(), e);
}
}
}
}
// The correct passphrase wasn't provided, and it isn't available from an
// encryption settings definition, so we need to prompt for it. See if
// that's allowed. Note that if any potential passphrases were provided,
// then we should continue on to prompt, since we've already handled the
// case in which we shouldn't prompt on an incorrect passphrase.
if ((! potentialPassphrasesProvided) && (! promptOnUnavailablePassphrase))
{
throw new GeneralSecurityException(
ERR_TOOL_UTILS_UNAVAILABLE_PASSPHRASE.get());
}
while (true)
{
// Read the passphrase from the user.
final String promptedPassphrase;
try
{
promptedPassphrase =
promptForEncryptionPassphrase(false, false, passphrasePrompt, null,
standardOutput, standardError);
}
catch (final LDAPException e)
{
Debug.debugException(e);
throw new IOException(e.getMessage(), e);
}
// Check to see if the passphrase was correct. If so, then use it.
// Otherwise, show an error and prompt again.
try
{
final char[] passphraseChars = promptedPassphrase.toCharArray();
final PassphraseEncryptedStreamHeader validStreamHeader =
PassphraseEncryptedStreamHeader.decode(
streamHeaderShell.getEncodedHeader(), passphraseChars);
return new ObjectPair(
new PassphraseEncryptedInputStream(markableInputStream,
validStreamHeader),
passphraseChars);
}
catch (final InvalidKeyException e)
{
Debug.debugException(e);
// The passphrase was incorrect. Display a wrapped error message and
// re-prompt.
wrap(incorrectPassphraseError, standardError);
standardError.println();
}
catch (final GeneralSecurityException e)
{
Debug.debugException(e);
throw e;
}
catch (final LDAPException e)
{
// This should never happen, since we were previously able to decode the
// header. Just treat it like a GeneralSecurityException.
Debug.debugException(e);
throw new GeneralSecurityException(e.getMessage(), e);
}
}
}
}