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	/*
	* Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.security.provider;

	import java.io.*;
	import java.net.*;
	import java.security.*;
	import java.security.cert.Certificate;
	import java.security.cert.CertificateFactory;
	import java.security.cert.CertificateException;
	import java.util.*;

	import static java.nio.charset.StandardCharsets.UTF_8;

	import sun.security.pkcs.EncryptedPrivateKeyInfo;
	import sun.security.util.PolicyUtil;

	/**
	* This class provides the domain keystore type identified as "DKS".
	* DKS presents a collection of separate keystores as a single logical keystore.
	* The collection of keystores is specified in a domain configuration file which
	* is passed to DKS in a {@link DomainLoadStoreParameter}.
	* <p>
	* The following properties are supported:
	* <dl>
	* <dt> {@code keystoreType="<type>"} </dt>
	* <dd> The keystore type. </dd>
	* <dt> {@code keystoreURI="<url>"} </dt>
	* <dd> The keystore location. </dd>
	* <dt> {@code keystoreProviderName="<name>"} </dt>
	* <dd> The name of the keystore's JCE provider. </dd>
	* <dt> {@code keystorePasswordEnv="<environment-variable>"} </dt>
	* <dd> The environment variable that stores a keystore password.
	* <dt> {@code entryNameSeparator="<separator>"} </dt>
	* <dd> The separator between a keystore name prefix and an entry name.
	* When specified, it applies to all the entries in a domain.
	* Its default value is a space. </dd>
	* </dl>
	*
	* @since 1.8
	*/

	abstract class DomainKeyStore extends KeyStoreSpi {

	// regular DKS
	public static final class DKS extends DomainKeyStore {
	String convertAlias(String alias) {
	return alias.toLowerCase(Locale.ENGLISH);
	}
	}

	// DKS property names
	private static final String ENTRY_NAME_SEPARATOR = "entrynameseparator";
	private static final String KEYSTORE_PROVIDER_NAME = "keystoreprovidername";
	private static final String KEYSTORE_TYPE = "keystoretype";
	private static final String KEYSTORE_URI = "keystoreuri";
	private static final String KEYSTORE_PASSWORD_ENV = "keystorepasswordenv";

	// RegEx meta characters
	private static final String REGEX_META = ".$\|()[{^?*+\\";

	// Default prefix for keystores loaded-by-stream
	private static final String DEFAULT_STREAM_PREFIX = "iostream";
	private int streamCounter = 1;
	private String entryNameSeparator = " ";
	private String entryNameSeparatorRegEx = " ";

	// Default keystore type
	private static final String DEFAULT_KEYSTORE_TYPE =
	KeyStore.getDefaultType();

	// Domain keystores
	private final Map<String, KeyStore> keystores = new HashMap<>();

	DomainKeyStore() {
	}

	// convert an alias to internal form, overridden in subclasses:
	// lower case for regular DKS
	abstract String convertAlias(String alias);

	/**
	* Returns the key associated with the given alias, using the given
	* password to recover it.
	*
	* @param alias the alias name
	* @param password the password for recovering the key
	*
	* @return the requested key, or null if the given alias does not exist
	* or does not identify a <i>key entry</i>.
	*
	* @exception NoSuchAlgorithmException if the algorithm for recovering the
	* key cannot be found
	* @exception UnrecoverableKeyException if the key cannot be recovered
	* (e.g., the given password is wrong).
	*/
	public Key engineGetKey(String alias, char[] password)
	throws NoSuchAlgorithmException, UnrecoverableKeyException
	{
	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);
	Key key = null;

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	key = keystore.getKey(entryAlias, password);
	if (key != null) {
	break;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return key;
	}

	/**
	* Returns the certificate chain associated with the given alias.
	*
	* @param alias the alias name
	*
	* @return the certificate chain (ordered with the user's certificate first
	* and the root certificate authority last), or null if the given alias
	* does not exist or does not contain a certificate chain (i.e., the given
	* alias identifies either a <i>trusted certificate entry</i> or a
	* <i>key entry</i> without a certificate chain).
	*/
	public Certificate[] engineGetCertificateChain(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);
	Certificate[] chain = null;

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	chain = keystore.getCertificateChain(entryAlias);
	if (chain != null) {
	break;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return chain;
	}

	/**
	* Returns the certificate associated with the given alias.
	*
	* <p>If the given alias name identifies a
	* <i>trusted certificate entry</i>, the certificate associated with that
	* entry is returned. If the given alias name identifies a
	* <i>key entry</i>, the first element of the certificate chain of that
	* entry is returned, or null if that entry does not have a certificate
	* chain.
	*
	* @param alias the alias name
	*
	* @return the certificate, or null if the given alias does not exist or
	* does not contain a certificate.
	*/
	public Certificate engineGetCertificate(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);
	Certificate cert = null;

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	cert = keystore.getCertificate(entryAlias);
	if (cert != null) {
	break;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return cert;
	}

	/**
	* Returns the creation date of the entry identified by the given alias.
	*
	* @param alias the alias name
	*
	* @return the creation date of this entry, or null if the given alias does
	* not exist
	*/
	public Date engineGetCreationDate(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);
	Date date = null;

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	date = keystore.getCreationDate(entryAlias);
	if (date != null) {
	break;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return date;
	}

	/**
	* Assigns the given private key to the given alias, protecting
	* it with the given password as defined in PKCS8.
	*
	* <p>The given java.security.PrivateKey <code>key</code> must
	* be accompanied by a certificate chain certifying the
	* corresponding public key.
	*
	* <p>If the given alias already exists, the keystore information
	* associated with it is overridden by the given key and certificate
	* chain.
	*
	* @param alias the alias name
	* @param key the private key to be associated with the alias
	* @param password the password to protect the key
	* @param chain the certificate chain for the corresponding public
	* key (only required if the given key is of type
	* <code>java.security.PrivateKey</code>).
	*
	* @exception KeyStoreException if the given key is not a private key,
	* cannot be protected, or this operation fails for some other reason
	*/
	public void engineSetKeyEntry(String alias, Key key, char[] password,
	Certificate[] chain)
	throws KeyStoreException
	{
	AbstractMap.SimpleEntry<String,
	AbstractMap.SimpleEntry<String, KeyStore>> pair =
	getKeystoreForWriting(alias);

	if (pair == null) {
	throw new KeyStoreException("Error setting key entry for '" +
	alias + "'");
	}
	String entryAlias = pair.getKey();
	Map.Entry<String, KeyStore> keystore = pair.getValue();
	keystore.getValue().setKeyEntry(entryAlias, key, password, chain);
	}

	/**
	* Assigns the given key (that has already been protected) to the given
	* alias.
	*
	* <p>If the protected key is of type
	* <code>java.security.PrivateKey</code>, it must be accompanied by a
	* certificate chain certifying the corresponding public key. If the
	* underlying keystore implementation is of type <code>jks</code>,
	* <code>key</code> must be encoded as an
	* <code>EncryptedPrivateKeyInfo</code> as defined in the PKCS #8 standard.
	*
	* <p>If the given alias already exists, the keystore information
	* associated with it is overridden by the given key (and possibly
	* certificate chain).
	*
	* @param alias the alias name
	* @param key the key (in protected format) to be associated with the alias
	* @param chain the certificate chain for the corresponding public
	* key (only useful if the protected key is of type
	* <code>java.security.PrivateKey</code>).
	*
	* @exception KeyStoreException if this operation fails.
	*/
	public void engineSetKeyEntry(String alias, byte[] key,
	Certificate[] chain)
	throws KeyStoreException
	{
	AbstractMap.SimpleEntry<String,
	AbstractMap.SimpleEntry<String, KeyStore>> pair =
	getKeystoreForWriting(alias);

	if (pair == null) {
	throw new KeyStoreException(
	"Error setting protected key entry for '" + alias + "'");
	}
	String entryAlias = pair.getKey();
	Map.Entry<String, KeyStore> keystore = pair.getValue();
	keystore.getValue().setKeyEntry(entryAlias, key, chain);
	}

	/**
	* Assigns the given certificate to the given alias.
	*
	* <p>If the given alias already exists in this keystore and identifies a
	* <i>trusted certificate entry</i>, the certificate associated with it is
	* overridden by the given certificate.
	*
	* @param alias the alias name
	* @param cert the certificate
	*
	* @exception KeyStoreException if the given alias already exists and does
	* not identify a <i>trusted certificate entry</i>, or this operation
	* fails for some other reason.
	*/
	public void engineSetCertificateEntry(String alias, Certificate cert)
	throws KeyStoreException
	{
	AbstractMap.SimpleEntry<String,
	AbstractMap.SimpleEntry<String, KeyStore>> pair =
	getKeystoreForWriting(alias);

	if (pair == null) {
	throw new KeyStoreException("Error setting certificate entry for '"
	+ alias + "'");
	}
	String entryAlias = pair.getKey();
	Map.Entry<String, KeyStore> keystore = pair.getValue();
	keystore.getValue().setCertificateEntry(entryAlias, cert);
	}

	/**
	* Deletes the entry identified by the given alias from this keystore.
	*
	* @param alias the alias name
	*
	* @exception KeyStoreException if the entry cannot be removed.
	*/
	public void engineDeleteEntry(String alias) throws KeyStoreException
	{
	AbstractMap.SimpleEntry<String,
	AbstractMap.SimpleEntry<String, KeyStore>> pair =
	getKeystoreForWriting(alias);

	if (pair == null) {
	throw new KeyStoreException("Error deleting entry for '" + alias +
	"'");
	}
	String entryAlias = pair.getKey();
	Map.Entry<String, KeyStore> keystore = pair.getValue();
	keystore.getValue().deleteEntry(entryAlias);
	}

	/**
	* Lists all the alias names of this keystore.
	*
	* @return enumeration of the alias names
	*/
	public Enumeration<String> engineAliases() {
	final Iterator<Map.Entry<String, KeyStore>> iterator =
	keystores.entrySet().iterator();

	return new Enumeration<String>() {
	private int index = 0;
	private Map.Entry<String, KeyStore> keystoresEntry = null;
	private String prefix = null;
	private Enumeration<String> aliases = null;

	public boolean hasMoreElements() {
	try {
	if (aliases == null) {
	if (iterator.hasNext()) {
	keystoresEntry = iterator.next();
	prefix = keystoresEntry.getKey() +
	entryNameSeparator;
	aliases = keystoresEntry.getValue().aliases();
	} else {
	return false;
	}
	}
	if (aliases.hasMoreElements()) {
	return true;
	} else {
	if (iterator.hasNext()) {
	keystoresEntry = iterator.next();
	prefix = keystoresEntry.getKey() +
	entryNameSeparator;
	aliases = keystoresEntry.getValue().aliases();
	} else {
	return false;
	}
	}
	} catch (KeyStoreException e) {
	return false;
	}

	return aliases.hasMoreElements();
	}

	public String nextElement() {
	if (hasMoreElements()) {
	return prefix + aliases.nextElement();
	}
	throw new NoSuchElementException();
	}
	};
	}

	/**
	* Checks if the given alias exists in this keystore.
	*
	* @param alias the alias name
	*
	* @return true if the alias exists, false otherwise
	*/
	public boolean engineContainsAlias(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	if (keystore.containsAlias(entryAlias)) {
	return true;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return false;
	}

	/**
	* Retrieves the number of entries in this keystore.
	*
	* @return the number of entries in this keystore
	*/
	public int engineSize() {

	int size = 0;
	try {
	for (KeyStore keystore : keystores.values()) {
	size += keystore.size();
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return size;
	}

	/**
	* Returns true if the entry identified by the given alias is a
	* <i>key entry</i>, and false otherwise.
	*
	* @return true if the entry identified by the given alias is a
	* <i>key entry</i>, false otherwise.
	*/
	public boolean engineIsKeyEntry(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	if (keystore.isKeyEntry(entryAlias)) {
	return true;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return false;
	}

	/**
	* Returns true if the entry identified by the given alias is a
	* <i>trusted certificate entry</i>, and false otherwise.
	*
	* @return true if the entry identified by the given alias is a
	* <i>trusted certificate entry</i>, false otherwise.
	*/
	public boolean engineIsCertificateEntry(String alias) {

	AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair =
	getKeystoresForReading(alias);

	try {
	String entryAlias = pair.getKey();
	for (KeyStore keystore : pair.getValue()) {
	if (keystore.isCertificateEntry(entryAlias)) {
	return true;
	}
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	return false;
	}

	/*
	* Returns a keystore entry alias and a list of target keystores.
	* When the supplied alias prefix identifies a keystore then that single
	* keystore is returned. When no alias prefix is supplied then all the
	* keystores are returned.
	*/
	private AbstractMap.SimpleEntry<String, Collection<KeyStore>>
	getKeystoresForReading(String alias) {

	String[] splits = alias.split(this.entryNameSeparatorRegEx, 2);
	if (splits.length == 2) { // prefixed alias
	KeyStore keystore = keystores.get(splits[0]);
	if (keystore != null) {
	return new AbstractMap.SimpleEntry<>(splits[1],
	(Collection<KeyStore>) Collections.singleton(keystore));
	}
	} else if (splits.length == 1) { // unprefixed alias
	// Check all keystores for the first occurrence of the alias
	return new AbstractMap.SimpleEntry<>(alias, keystores.values());
	}
	return new AbstractMap.SimpleEntry<>("",
	(Collection<KeyStore>) Collections.<KeyStore>emptyList());
	}

	/*
	* Returns a keystore entry alias and a single target keystore.
	* An alias prefix must be supplied.
	*/
	private
	AbstractMap.SimpleEntry<String, AbstractMap.SimpleEntry<String, KeyStore>>
	getKeystoreForWriting(String alias) {

	String[] splits = alias.split(this.entryNameSeparator, 2);
	if (splits.length == 2) { // prefixed alias
	KeyStore keystore = keystores.get(splits[0]);
	if (keystore != null) {
	return new AbstractMap.SimpleEntry<>(splits[1],
	new AbstractMap.SimpleEntry<>(splits[0], keystore));
	}
	}
	return null;
	}

	/**
	* Returns the (alias) name of the first keystore entry whose certificate
	* matches the given certificate.
	*
	* <p>This method attempts to match the given certificate with each
	* keystore entry. If the entry being considered
	* is a <i>trusted certificate entry</i>, the given certificate is
	* compared to that entry's certificate. If the entry being considered is
	* a <i>key entry</i>, the given certificate is compared to the first
	* element of that entry's certificate chain (if a chain exists).
	*
	* @param cert the certificate to match with.
	*
	* @return the (alias) name of the first entry with matching certificate,
	* or null if no such entry exists in this keystore.
	*/
	public String engineGetCertificateAlias(Certificate cert) {

	try {

	String alias = null;
	for (KeyStore keystore : keystores.values()) {
	if ((alias = keystore.getCertificateAlias(cert)) != null) {
	break;
	}
	}
	return alias;

	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}
	}

	/**
	* Stores this keystore to the given output stream, and protects its
	* integrity with the given password.
	*
	* @param stream the output stream to which this keystore is written.
	* @param password the password to generate the keystore integrity check
	*
	* @exception IOException if there was an I/O problem with data
	* @exception NoSuchAlgorithmException if the appropriate data integrity
	* algorithm could not be found
	* @exception CertificateException if any of the certificates included in
	* the keystore data could not be stored
	*/
	public void engineStore(OutputStream stream, char[] password)
	throws IOException, NoSuchAlgorithmException, CertificateException
	{
	// Support storing to a stream only when a single keystore has been
	// configured
	try {
	if (keystores.size() == 1) {
	keystores.values().iterator().next().store(stream, password);
	return;
	}
	} catch (KeyStoreException e) {
	throw new IllegalStateException(e);
	}

	throw new UnsupportedOperationException(
	"This keystore must be stored using a DomainLoadStoreParameter");
	}

	@Override
	public void engineStore(KeyStore.LoadStoreParameter param)
	throws IOException, NoSuchAlgorithmException, CertificateException
	{
	if (param instanceof DomainLoadStoreParameter) {
	DomainLoadStoreParameter domainParameter =
	(DomainLoadStoreParameter) param;
	List<KeyStoreBuilderComponents> builders = getBuilders(
	domainParameter.getConfiguration(),
	domainParameter.getProtectionParams());

	for (KeyStoreBuilderComponents builder : builders) {

	try {

	KeyStore.ProtectionParameter pp = builder.protection;
	if (!(pp instanceof KeyStore.PasswordProtection)) {
	throw new KeyStoreException(
	new IllegalArgumentException("ProtectionParameter" +
	" must be a KeyStore.PasswordProtection"));
	}
	char[] password =
	((KeyStore.PasswordProtection) builder.protection)
	.getPassword();

	// Store the keystores
	KeyStore keystore = keystores.get(builder.name);

	try (FileOutputStream stream =
	new FileOutputStream(builder.file)) {

	keystore.store(stream, password);
	}
	} catch (KeyStoreException e) {
	throw new IOException(e);
	}
	}
	} else {
	throw new UnsupportedOperationException(
	"This keystore must be stored using a " +
	"DomainLoadStoreParameter");
	}
	}

	/**
	* Loads the keystore from the given input stream.
	*
	* <p>If a password is given, it is used to check the integrity of the
	* keystore data. Otherwise, the integrity of the keystore is not checked.
	*
	* @param stream the input stream from which the keystore is loaded
	* @param password the (optional) password used to check the integrity of
	* the keystore.
	*
	* @exception IOException if there is an I/O or format problem with the
	* keystore data
	* @exception NoSuchAlgorithmException if the algorithm used to check
	* the integrity of the keystore cannot be found
	* @exception CertificateException if any of the certificates in the
	* keystore could not be loaded
	*/
	public void engineLoad(InputStream stream, char[] password)
	throws IOException, NoSuchAlgorithmException, CertificateException
	{
	// Support loading from a stream only for a JKS or default type keystore
	try {
	KeyStore keystore = null;

	try {
	keystore = KeyStore.getInstance("JKS");
	keystore.load(stream, password);

	} catch (Exception e) {
	// Retry
	if (!"JKS".equalsIgnoreCase(DEFAULT_KEYSTORE_TYPE)) {
	keystore = KeyStore.getInstance(DEFAULT_KEYSTORE_TYPE);
	keystore.load(stream, password);
	} else {
	throw e;
	}
	}
	String keystoreName = DEFAULT_STREAM_PREFIX + streamCounter++;
	keystores.put(keystoreName, keystore);

	} catch (Exception e) {
	throw new UnsupportedOperationException(
	"This keystore must be loaded using a " +
	"DomainLoadStoreParameter");
	}
	}

	@Override
	public void engineLoad(KeyStore.LoadStoreParameter param)
	throws IOException, NoSuchAlgorithmException, CertificateException
	{
	if (param instanceof DomainLoadStoreParameter) {
	DomainLoadStoreParameter domainParameter =
	(DomainLoadStoreParameter) param;
	List<KeyStoreBuilderComponents> builders = getBuilders(
	domainParameter.getConfiguration(),
	domainParameter.getProtectionParams());

	for (KeyStoreBuilderComponents builder : builders) {

	try {
	// Load the keystores (file-based and non-file-based)
	if (builder.file != null) {
	keystores.put(builder.name,
	KeyStore.Builder.newInstance(builder.type,
	builder.provider, builder.file,
	builder.protection)
	.getKeyStore());
	} else {
	keystores.put(builder.name,
	KeyStore.Builder.newInstance(builder.type,
	builder.provider, builder.protection)
	.getKeyStore());
	}
	} catch (KeyStoreException e) {
	throw new IOException(e);
	}
	}
	} else {
	throw new UnsupportedOperationException(
	"This keystore must be loaded using a " +
	"DomainLoadStoreParameter");
	}
	}

	/*
	* Parse a keystore domain configuration file and associated collection
	* of keystore passwords to create a collection of KeyStore.Builder.
	*/
	private List<KeyStoreBuilderComponents> getBuilders(URI configuration,
	Map<String, KeyStore.ProtectionParameter> passwords)
	throws IOException {

	PolicyParser parser = new PolicyParser(true); // expand properties
	Collection<PolicyParser.DomainEntry> domains = null;
	List<KeyStoreBuilderComponents> builders = new ArrayList<>();
	String uriDomain = configuration.getFragment();

	try (InputStreamReader configurationReader =
	new InputStreamReader(
	PolicyUtil.getInputStream(configuration.toURL()), UTF_8)) {
	parser.read(configurationReader);
	domains = parser.getDomainEntries();

	} catch (MalformedURLException mue) {
	throw new IOException(mue);

	} catch (PolicyParser.ParsingException pe) {
	throw new IOException(pe);
	}

	for (PolicyParser.DomainEntry domain : domains) {
	Map<String, String> domainProperties = domain.getProperties();

	if (uriDomain != null &&
	(!uriDomain.equalsIgnoreCase(domain.getName()))) {
	continue; // skip this domain
	}

	if (domainProperties.containsKey(ENTRY_NAME_SEPARATOR)) {
	this.entryNameSeparator =
	domainProperties.get(ENTRY_NAME_SEPARATOR);
	// escape any regex meta characters
	char ch = 0;
	StringBuilder s = new StringBuilder();
	for (int i = 0; i < this.entryNameSeparator.length(); i++) {
	ch = this.entryNameSeparator.charAt(i);
	if (REGEX_META.indexOf(ch) != -1) {
	s.append('\\');
	}
	s.append(ch);
	}
	this.entryNameSeparatorRegEx = s.toString();
	}

	Collection<PolicyParser.KeyStoreEntry> keystores =
	domain.getEntries();
	for (PolicyParser.KeyStoreEntry keystore : keystores) {
	String keystoreName = keystore.getName();
	Map<String, String> properties =
	new HashMap<>(domainProperties);
	properties.putAll(keystore.getProperties());

	String keystoreType = DEFAULT_KEYSTORE_TYPE;
	if (properties.containsKey(KEYSTORE_TYPE)) {
	keystoreType = properties.get(KEYSTORE_TYPE);
	}

	Provider keystoreProvider = null;
	if (properties.containsKey(KEYSTORE_PROVIDER_NAME)) {
	String keystoreProviderName =
	properties.get(KEYSTORE_PROVIDER_NAME);
	keystoreProvider =
	Security.getProvider(keystoreProviderName);
	if (keystoreProvider == null) {
	throw new IOException("Error locating JCE provider: " +
	keystoreProviderName);
	}
	}

	File keystoreFile = null;
	if (properties.containsKey(KEYSTORE_URI)) {
	String uri = properties.get(KEYSTORE_URI);

	try {
	if (uri.startsWith("file://")) {
	keystoreFile = new File(new URI(uri));
	} else {
	keystoreFile = new File(uri);
	}

	} catch (URISyntaxException \| IllegalArgumentException e) {
	throw new IOException(
	"Error processing keystore property: " +
	"keystoreURI=\"" + uri + "\"", e);
	}
	}

	KeyStore.ProtectionParameter keystoreProtection = null;
	if (passwords.containsKey(keystoreName)) {
	keystoreProtection = passwords.get(keystoreName);

	} else if (properties.containsKey(KEYSTORE_PASSWORD_ENV)) {
	String env = properties.get(KEYSTORE_PASSWORD_ENV);
	String pwd = System.getenv(env);
	if (pwd != null) {
	keystoreProtection =
	new KeyStore.PasswordProtection(pwd.toCharArray());
	} else {
	throw new IOException(
	"Error processing keystore property: " +
	"keystorePasswordEnv=\"" + env + "\"");
	}
	} else {
	keystoreProtection = new KeyStore.PasswordProtection(null);
	}

	builders.add(new KeyStoreBuilderComponents(keystoreName,
	keystoreType, keystoreProvider, keystoreFile,
	keystoreProtection));
	}
	break; // skip other domains
	}
	if (builders.isEmpty()) {
	throw new IOException("Error locating domain configuration data " +
	"for: " + configuration);
	}

	return builders;
	}

	/*
	* Utility class that holds the components used to construct a KeyStore.Builder
	*/
	static class KeyStoreBuilderComponents {
	String name;
	String type;
	Provider provider;
	File file;
	KeyStore.ProtectionParameter protection;

	KeyStoreBuilderComponents(String name, String type, Provider provider,
	File file, KeyStore.ProtectionParameter protection) {
	this.name = name;
	this.type = type;
	this.provider = provider;
	this.file = file;
	this.protection = protection;
	}
	}
	}

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