hadoop KMSClientProvider 源码
haddop KMSClientProvider 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/key/kms/KMSClientProvider.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.hadoop.crypto.key.kms;
import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.crypto.key.KeyProvider;
import org.apache.hadoop.crypto.key.KeyProviderCryptoExtension.EncryptedKeyVersion;
import org.apache.hadoop.crypto.key.KeyProviderDelegationTokenExtension;
import org.apache.hadoop.crypto.key.KeyProviderFactory;
import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.ProviderUtils;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.client.ConnectionConfigurator;
import org.apache.hadoop.security.ssl.SSLFactory;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.security.token.TokenRenewer;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSelector;
import org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticatedURL;
import org.apache.hadoop.util.HttpExceptionUtils;
import org.apache.hadoop.util.JsonSerialization;
import org.apache.hadoop.util.KMSUtil;
import org.apache.http.client.utils.URIBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.net.ssl.HttpsURLConnection;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.lang.reflect.UndeclaredThrowableException;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.security.GeneralSecurityException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ExecutionException;
import org.apache.hadoop.crypto.key.KeyProviderCryptoExtension;
import org.apache.hadoop.crypto.key.KeyProviderCryptoExtension.CryptoExtension;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.hadoop.classification.VisibleForTesting;
import org.apache.hadoop.util.Preconditions;
import org.apache.hadoop.thirdparty.com.google.common.base.Strings;
import static org.apache.hadoop.util.KMSUtil.checkNotEmpty;
import static org.apache.hadoop.util.KMSUtil.checkNotNull;
import static org.apache.hadoop.util.KMSUtil.parseJSONEncKeyVersion;
import static org.apache.hadoop.util.KMSUtil.parseJSONEncKeyVersions;
import static org.apache.hadoop.util.KMSUtil.parseJSONKeyVersion;
import static org.apache.hadoop.util.KMSUtil.parseJSONMetadata;
/**
* KMS client <code>KeyProvider</code> implementation.
*/
@InterfaceAudience.Private
public class KMSClientProvider extends KeyProvider implements CryptoExtension,
KeyProviderDelegationTokenExtension.DelegationTokenExtension {
static final Logger LOG =
LoggerFactory.getLogger(KMSClientProvider.class);
private static final String INVALID_SIGNATURE = "Invalid signature";
private static final String ANONYMOUS_REQUESTS_DISALLOWED = "Anonymous requests are disallowed";
public static final String TOKEN_KIND_STR = KMSDelegationToken.TOKEN_KIND_STR;
public static final Text TOKEN_KIND = KMSDelegationToken.TOKEN_KIND;
public static final String SCHEME_NAME = "kms";
private static final String UTF8 = "UTF-8";
private static final String CONTENT_TYPE = "Content-Type";
private static final String APPLICATION_JSON_MIME = "application/json";
private static final String HTTP_GET = "GET";
private static final String HTTP_POST = "POST";
private static final String HTTP_PUT = "PUT";
private static final String HTTP_DELETE = "DELETE";
private static final String CONFIG_PREFIX = "hadoop.security.kms.client.";
/* Number of times to retry authentication in the event of auth failure
* (normally happens due to stale authToken)
*/
public static final String AUTH_RETRY = CONFIG_PREFIX
+ "authentication.retry-count";
public static final int DEFAULT_AUTH_RETRY = 1;
private final ValueQueue<EncryptedKeyVersion> encKeyVersionQueue;
private KeyProviderDelegationTokenExtension.DelegationTokenExtension
clientTokenProvider = this;
// the token's service.
private final Text dtService;
// alias in the credentials.
private final Text canonicalService;
private class EncryptedQueueRefiller implements
ValueQueue.QueueRefiller<EncryptedKeyVersion> {
@Override
public void fillQueueForKey(String keyName,
Queue<EncryptedKeyVersion> keyQueue, int numEKVs) throws IOException {
checkNotNull(keyName, "keyName");
Map<String, String> params = new HashMap<String, String>();
params.put(KMSRESTConstants.EEK_OP, KMSRESTConstants.EEK_GENERATE);
params.put(KMSRESTConstants.EEK_NUM_KEYS, "" + numEKVs);
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, keyName,
KMSRESTConstants.EEK_SUB_RESOURCE, params);
HttpURLConnection conn = createConnection(url, HTTP_GET);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
List response = call(conn, null,
HttpURLConnection.HTTP_OK, List.class);
List<EncryptedKeyVersion> ekvs =
parseJSONEncKeyVersions(keyName, response);
keyQueue.addAll(ekvs);
}
}
static class TokenSelector extends AbstractDelegationTokenSelector {
static final TokenSelector INSTANCE = new TokenSelector();
TokenSelector() {
super(TOKEN_KIND);
}
}
/**
* The KMS implementation of {@link TokenRenewer}.
*/
public static class KMSTokenRenewer extends TokenRenewer {
private static final Logger LOG =
LoggerFactory.getLogger(KMSTokenRenewer.class);
@Override
public boolean handleKind(Text kind) {
return kind.equals(TOKEN_KIND);
}
@Override
public boolean isManaged(Token<?> token) throws IOException {
return true;
}
@Override
public long renew(Token<?> token, Configuration conf) throws IOException {
LOG.debug("Renewing delegation token {}", token);
KeyProvider keyProvider = createKeyProvider(token, conf);
try {
if (!(keyProvider instanceof
KeyProviderDelegationTokenExtension.DelegationTokenExtension)) {
throw new IOException(String
.format("keyProvider %s cannot renew token [%s]",
keyProvider == null ? "null" : keyProvider.getClass(),
token));
}
return ((KeyProviderDelegationTokenExtension.DelegationTokenExtension)
keyProvider).renewDelegationToken(token);
} finally {
if (keyProvider != null) {
keyProvider.close();
}
}
}
@Override
public void cancel(Token<?> token, Configuration conf) throws IOException {
LOG.debug("Canceling delegation token {}", token);
KeyProvider keyProvider = createKeyProvider(token, conf);
try {
if (!(keyProvider instanceof
KeyProviderDelegationTokenExtension.DelegationTokenExtension)) {
throw new IOException(String
.format("keyProvider %s cannot cancel token [%s]",
keyProvider == null ? "null" : keyProvider.getClass(),
token));
}
((KeyProviderDelegationTokenExtension.DelegationTokenExtension)
keyProvider).cancelDelegationToken(token);
} finally {
if (keyProvider != null) {
keyProvider.close();
}
}
}
private static KeyProvider createKeyProvider(
Token<?> token, Configuration conf) throws IOException {
String service = token.getService().toString();
URI uri;
if (service != null && service.startsWith(SCHEME_NAME + ":/")) {
LOG.debug("Creating key provider with token service value {}", service);
uri = URI.create(service);
} else { // conf fallback
uri = KMSUtil.getKeyProviderUri(conf);
}
return (uri != null) ? KMSUtil.createKeyProviderFromUri(conf, uri) : null;
}
}
public static class KMSEncryptedKeyVersion extends EncryptedKeyVersion {
public KMSEncryptedKeyVersion(String keyName, String keyVersionName,
byte[] iv, String encryptedVersionName, byte[] keyMaterial) {
super(keyName, keyVersionName, iv, new KMSKeyVersion(null,
encryptedVersionName, keyMaterial));
}
}
private static void writeJson(Object obj, OutputStream os)
throws IOException {
Writer writer = new OutputStreamWriter(os, StandardCharsets.UTF_8);
JsonSerialization.writer().writeValue(writer, obj);
}
/**
* The factory to create KMSClientProvider, which is used by the
* ServiceLoader.
*/
public static class Factory extends KeyProviderFactory {
/**
* This provider expects URIs in the following form :
* {@literal kms://<PROTO>@<AUTHORITY>/<PATH>}
*
* where :
* - PROTO = http or https
* - AUTHORITY = {@literal <HOSTS>[:<PORT>]}
* - HOSTS = {@literal <HOSTNAME>[;<HOSTS>]}
* - HOSTNAME = string
* - PORT = integer
*
* This will always create a {@link LoadBalancingKMSClientProvider}
* if the uri is correct.
*/
@Override
public KeyProvider createProvider(URI providerUri, Configuration conf)
throws IOException {
if (SCHEME_NAME.equals(providerUri.getScheme())) {
URL origUrl = new URL(extractKMSPath(providerUri).toString());
String authority = origUrl.getAuthority();
// check for ';' which delimits the backup hosts
if (Strings.isNullOrEmpty(authority)) {
throw new IOException(
"No valid authority in kms uri [" + origUrl + "]");
}
// Check if port is present in authority
// In the current scheme, all hosts have to run on the same port
int port = -1;
String hostsPart = authority;
if (authority.contains(":")) {
String[] t = authority.split(":");
try {
port = Integer.parseInt(t[1]);
} catch (Exception e) {
throw new IOException(
"Could not parse port in kms uri [" + origUrl + "]");
}
hostsPart = t[0];
}
KMSClientProvider[] providers =
createProviders(conf, origUrl, port, hostsPart);
return new LoadBalancingKMSClientProvider(providerUri, providers, conf);
}
return null;
}
private KMSClientProvider[] createProviders(Configuration conf,
URL origUrl, int port, String hostsPart) throws IOException {
String[] hosts = hostsPart.split(";");
KMSClientProvider[] providers = new KMSClientProvider[hosts.length];
for (int i = 0; i < hosts.length; i++) {
try {
providers[i] =
new KMSClientProvider(
new URI("kms", origUrl.getProtocol(), hosts[i], port,
origUrl.getPath(), null, null), conf);
} catch (URISyntaxException e) {
throw new IOException("Could not instantiate KMSProvider.", e);
}
}
return providers;
}
}
private URL kmsUrl;
private SSLFactory sslFactory;
private ConnectionConfigurator configurator;
private DelegationTokenAuthenticatedURL.Token authToken;
private final int authRetry;
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("KMSClientProvider[");
sb.append(kmsUrl).append("]");
return sb.toString();
}
/**
* This small class exists to set the timeout values for a connection
*/
private static class TimeoutConnConfigurator
implements ConnectionConfigurator {
private ConnectionConfigurator cc;
private int timeout;
/**
* Sets the timeout and wraps another connection configurator
* @param timeout - will set both connect and read timeouts - in seconds
* @param cc - another configurator to wrap - may be null
*/
public TimeoutConnConfigurator(int timeout, ConnectionConfigurator cc) {
this.timeout = timeout;
this.cc = cc;
}
/**
* Calls the wrapped configure() method, then sets timeouts
* @param conn the {@link HttpURLConnection} instance to configure.
* @return the connection
* @throws IOException
*/
@Override
public HttpURLConnection configure(HttpURLConnection conn)
throws IOException {
if (cc != null) {
conn = cc.configure(conn);
}
conn.setConnectTimeout(timeout * 1000); // conversion to milliseconds
conn.setReadTimeout(timeout * 1000);
return conn;
}
}
public KMSClientProvider(URI uri, Configuration conf) throws IOException {
super(conf);
kmsUrl = createServiceURL(extractKMSPath(uri));
// the token's service so it can be instantiated for renew/cancel.
dtService = getDtService(uri);
// the canonical service is the alias for the token in the credentials.
// typically it's the actual service in the token but older clients expect
// an address.
URI serviceUri = URI.create(kmsUrl.toString());
canonicalService = SecurityUtil.buildTokenService(serviceUri);
if ("https".equalsIgnoreCase(kmsUrl.getProtocol())) {
sslFactory = new SSLFactory(SSLFactory.Mode.CLIENT, conf);
try {
sslFactory.init();
} catch (GeneralSecurityException ex) {
throw new IOException(ex);
}
}
int timeout = conf.getInt(
CommonConfigurationKeysPublic.KMS_CLIENT_TIMEOUT_SECONDS,
CommonConfigurationKeysPublic.KMS_CLIENT_TIMEOUT_DEFAULT);
authRetry = conf.getInt(AUTH_RETRY, DEFAULT_AUTH_RETRY);
configurator = new TimeoutConnConfigurator(timeout, sslFactory);
encKeyVersionQueue =
new ValueQueue<KeyProviderCryptoExtension.EncryptedKeyVersion>(
conf.getInt(
CommonConfigurationKeysPublic.KMS_CLIENT_ENC_KEY_CACHE_SIZE,
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_SIZE_DEFAULT),
conf.getFloat(
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK,
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_LOW_WATERMARK_DEFAULT),
conf.getInt(
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_MS,
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_EXPIRY_DEFAULT),
conf.getInt(
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS,
CommonConfigurationKeysPublic.
KMS_CLIENT_ENC_KEY_CACHE_NUM_REFILL_THREADS_DEFAULT),
new EncryptedQueueRefiller());
authToken = new DelegationTokenAuthenticatedURL.Token();
LOG.debug("KMSClientProvider created for KMS url: {} delegation token "
+ "service: {} canonical service: {}.", kmsUrl, dtService,
canonicalService);
}
protected static Text getDtService(URI uri) {
Text service;
// remove fragment for forward compatibility with logical naming.
final String fragment = uri.getFragment();
if (fragment != null) {
service = new Text(
uri.getScheme() + ":" + uri.getSchemeSpecificPart());
} else {
service = new Text(uri.toString());
}
return service;
}
private static Path extractKMSPath(URI uri) throws MalformedURLException, IOException {
return ProviderUtils.unnestUri(uri);
}
private static URL createServiceURL(Path path) throws IOException {
String str = new URL(path.toString()).toExternalForm();
if (str.endsWith("/")) {
str = str.substring(0, str.length() - 1);
}
return new URL(str + KMSRESTConstants.SERVICE_VERSION + "/");
}
private URL createURL(String collection, String resource, String subResource,
Map<String, ?> parameters) throws IOException {
try {
StringBuilder sb = new StringBuilder();
sb.append(kmsUrl);
if (collection != null) {
sb.append(collection);
if (resource != null) {
sb.append("/").append(URLEncoder.encode(resource, UTF8));
if (subResource != null) {
sb.append("/").append(subResource);
}
}
}
URIBuilder uriBuilder = new URIBuilder(sb.toString());
if (parameters != null) {
for (Map.Entry<String, ?> param : parameters.entrySet()) {
Object value = param.getValue();
if (value instanceof String) {
uriBuilder.addParameter(param.getKey(), (String) value);
} else {
for (String s : (String[]) value) {
uriBuilder.addParameter(param.getKey(), s);
}
}
}
}
return uriBuilder.build().toURL();
} catch (URISyntaxException ex) {
throw new IOException(ex);
}
}
private HttpURLConnection configureConnection(HttpURLConnection conn)
throws IOException {
if (sslFactory != null) {
HttpsURLConnection httpsConn = (HttpsURLConnection) conn;
try {
httpsConn.setSSLSocketFactory(sslFactory.createSSLSocketFactory());
} catch (GeneralSecurityException ex) {
throw new IOException(ex);
}
httpsConn.setHostnameVerifier(sslFactory.getHostnameVerifier());
}
return conn;
}
private HttpURLConnection createConnection(final URL url, String method)
throws IOException {
HttpURLConnection conn;
try {
final String doAsUser = getDoAsUser();
conn = getActualUgi().doAs(new PrivilegedExceptionAction
<HttpURLConnection>() {
@Override
public HttpURLConnection run() throws Exception {
DelegationTokenAuthenticatedURL authUrl =
createAuthenticatedURL();
return authUrl.openConnection(url, authToken, doAsUser);
}
});
} catch (ConnectException ex) {
String msg = "Failed to connect to: " + url.toString();
LOG.warn(msg);
throw new IOException(msg, ex);
} catch (SocketTimeoutException ex) {
LOG.warn("Failed to connect to {}:{}", url.getHost(), url.getPort());
throw ex;
} catch (IOException ex) {
throw ex;
} catch (UndeclaredThrowableException ex) {
throw new IOException(ex.getUndeclaredThrowable());
} catch (Exception ex) {
throw new IOException(ex);
}
conn.setUseCaches(false);
conn.setRequestMethod(method);
if (method.equals(HTTP_POST) || method.equals(HTTP_PUT)) {
conn.setDoOutput(true);
}
conn = configureConnection(conn);
return conn;
}
private <T> T call(HttpURLConnection conn, Object jsonOutput,
int expectedResponse, Class<T> klass) throws IOException {
return call(conn, jsonOutput, expectedResponse, klass, authRetry);
}
private <T> T call(HttpURLConnection conn, Object jsonOutput,
int expectedResponse, Class<T> klass, int authRetryCount)
throws IOException {
T ret = null;
OutputStream os = null;
try {
if (jsonOutput != null) {
os = conn.getOutputStream();
writeJson(jsonOutput, os);
}
} catch (IOException ex) {
// The payload is not serialized if getOutputStream fails.
// Calling getInputStream will issue the put/post request with no payload
// which causes HTTP 500 server error.
if (os == null) {
conn.disconnect();
} else {
IOUtils.closeStream(conn.getInputStream());
}
throw ex;
}
if ((conn.getResponseCode() == HttpURLConnection.HTTP_FORBIDDEN
&& (conn.getResponseMessage().equals(ANONYMOUS_REQUESTS_DISALLOWED) ||
conn.getResponseMessage().contains(INVALID_SIGNATURE)))
|| conn.getResponseCode() == HttpURLConnection.HTTP_UNAUTHORIZED) {
// Ideally, this should happen only when there is an Authentication
// failure. Unfortunately, the AuthenticationFilter returns 403 when it
// cannot authenticate (Since a 401 requires Server to send
// WWW-Authenticate header as well)..
if (LOG.isDebugEnabled()) {
LOG.debug("Response={}({}), resetting authToken",
conn.getResponseCode(), conn.getResponseMessage());
}
KMSClientProvider.this.authToken =
new DelegationTokenAuthenticatedURL.Token();
if (authRetryCount > 0) {
String contentType = conn.getRequestProperty(CONTENT_TYPE);
String requestMethod = conn.getRequestMethod();
URL url = conn.getURL();
conn = createConnection(url, requestMethod);
if (contentType != null && !contentType.isEmpty()) {
conn.setRequestProperty(CONTENT_TYPE, contentType);
}
return call(conn, jsonOutput, expectedResponse, klass,
authRetryCount - 1);
}
}
HttpExceptionUtils.validateResponse(conn, expectedResponse);
if (conn.getContentType() != null
&& conn.getContentType().trim().toLowerCase()
.startsWith(APPLICATION_JSON_MIME)
&& klass != null) {
ObjectMapper mapper = new ObjectMapper();
InputStream is = null;
try {
is = conn.getInputStream();
ret = mapper.readValue(is, klass);
} finally {
IOUtils.closeStream(is);
}
}
return ret;
}
public static class KMSKeyVersion extends KeyVersion {
public KMSKeyVersion(String keyName, String versionName, byte[] material) {
super(keyName, versionName, material);
}
}
@Override
public KeyVersion getKeyVersion(String versionName) throws IOException {
checkNotEmpty(versionName, "versionName");
URL url = createURL(KMSRESTConstants.KEY_VERSION_RESOURCE,
versionName, null, null);
HttpURLConnection conn = createConnection(url, HTTP_GET);
Map response = call(conn, null, HttpURLConnection.HTTP_OK, Map.class);
return parseJSONKeyVersion(response);
}
@Override
public KeyVersion getCurrentKey(String name) throws IOException {
checkNotEmpty(name, "name");
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name,
KMSRESTConstants.CURRENT_VERSION_SUB_RESOURCE, null);
HttpURLConnection conn = createConnection(url, HTTP_GET);
Map response = call(conn, null, HttpURLConnection.HTTP_OK, Map.class);
return parseJSONKeyVersion(response);
}
@Override
@SuppressWarnings("unchecked")
public List<String> getKeys() throws IOException {
URL url = createURL(KMSRESTConstants.KEYS_NAMES_RESOURCE, null, null,
null);
HttpURLConnection conn = createConnection(url, HTTP_GET);
List response = call(conn, null, HttpURLConnection.HTTP_OK, List.class);
return (List<String>) response;
}
public static class KMSMetadata extends Metadata {
public KMSMetadata(String cipher, int bitLength, String description,
Map<String, String> attributes, Date created, int versions) {
super(cipher, bitLength, description, attributes, created, versions);
}
}
// breaking keyNames into sets to keep resulting URL undler 2000 chars
private List<String[]> createKeySets(String[] keyNames) {
List<String[]> list = new ArrayList<String[]>();
List<String> batch = new ArrayList<String>();
int batchLen = 0;
for (String name : keyNames) {
int additionalLen = KMSRESTConstants.KEY.length() + 1 + name.length();
batchLen += additionalLen;
// topping at 1500 to account for initial URL and encoded names
if (batchLen > 1500) {
list.add(batch.toArray(new String[batch.size()]));
batch = new ArrayList<String>();
batchLen = additionalLen;
}
batch.add(name);
}
if (!batch.isEmpty()) {
list.add(batch.toArray(new String[batch.size()]));
}
return list;
}
@Override
@SuppressWarnings("unchecked")
public Metadata[] getKeysMetadata(String ... keyNames) throws IOException {
List<Metadata> keysMetadata = new ArrayList<Metadata>();
List<String[]> keySets = createKeySets(keyNames);
for (String[] keySet : keySets) {
if (keyNames.length > 0) {
Map<String, Object> queryStr = new HashMap<String, Object>();
queryStr.put(KMSRESTConstants.KEY, keySet);
URL url = createURL(KMSRESTConstants.KEYS_METADATA_RESOURCE, null,
null, queryStr);
HttpURLConnection conn = createConnection(url, HTTP_GET);
List<Map> list = call(conn, null, HttpURLConnection.HTTP_OK, List.class);
for (Map map : list) {
keysMetadata.add(parseJSONMetadata(map));
}
}
}
return keysMetadata.toArray(new Metadata[keysMetadata.size()]);
}
private KeyVersion createKeyInternal(String name, byte[] material,
Options options)
throws NoSuchAlgorithmException, IOException {
checkNotEmpty(name, "name");
checkNotNull(options, "options");
Map<String, Object> jsonKey = new HashMap<String, Object>();
jsonKey.put(KMSRESTConstants.NAME_FIELD, name);
jsonKey.put(KMSRESTConstants.CIPHER_FIELD, options.getCipher());
jsonKey.put(KMSRESTConstants.LENGTH_FIELD, options.getBitLength());
if (material != null) {
jsonKey.put(KMSRESTConstants.MATERIAL_FIELD,
Base64.encodeBase64String(material));
}
if (options.getDescription() != null) {
jsonKey.put(KMSRESTConstants.DESCRIPTION_FIELD,
options.getDescription());
}
if (options.getAttributes() != null && !options.getAttributes().isEmpty()) {
jsonKey.put(KMSRESTConstants.ATTRIBUTES_FIELD, options.getAttributes());
}
URL url = createURL(KMSRESTConstants.KEYS_RESOURCE, null, null, null);
HttpURLConnection conn = createConnection(url, HTTP_POST);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
Map response = call(conn, jsonKey, HttpURLConnection.HTTP_CREATED,
Map.class);
return parseJSONKeyVersion(response);
}
@Override
public KeyVersion createKey(String name, Options options)
throws NoSuchAlgorithmException, IOException {
return createKeyInternal(name, null, options);
}
@Override
public KeyVersion createKey(String name, byte[] material, Options options)
throws IOException {
checkNotNull(material, "material");
try {
return createKeyInternal(name, material, options);
} catch (NoSuchAlgorithmException ex) {
throw new RuntimeException("It should not happen", ex);
}
}
@Override
public void invalidateCache(String name) throws IOException {
checkNotEmpty(name, "name");
final URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name,
KMSRESTConstants.INVALIDATECACHE_RESOURCE, null);
final HttpURLConnection conn = createConnection(url, HTTP_POST);
// invalidate the server cache first, then drain local cache.
call(conn, null, HttpURLConnection.HTTP_OK, null);
drain(name);
}
private KeyVersion rollNewVersionInternal(String name, byte[] material)
throws NoSuchAlgorithmException, IOException {
checkNotEmpty(name, "name");
Map<String, String> jsonMaterial = new HashMap<String, String>();
if (material != null) {
jsonMaterial.put(KMSRESTConstants.MATERIAL_FIELD,
Base64.encodeBase64String(material));
}
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name, null, null);
HttpURLConnection conn = createConnection(url, HTTP_POST);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
Map response = call(conn, jsonMaterial,
HttpURLConnection.HTTP_OK, Map.class);
KeyVersion keyVersion = parseJSONKeyVersion(response);
invalidateCache(name);
return keyVersion;
}
@Override
public KeyVersion rollNewVersion(String name)
throws NoSuchAlgorithmException, IOException {
return rollNewVersionInternal(name, null);
}
@Override
public KeyVersion rollNewVersion(String name, byte[] material)
throws IOException {
checkNotNull(material, "material");
try {
return rollNewVersionInternal(name, material);
} catch (NoSuchAlgorithmException ex) {
throw new RuntimeException("It should not happen", ex);
}
}
@Override
public EncryptedKeyVersion generateEncryptedKey(
String encryptionKeyName) throws IOException, GeneralSecurityException {
try {
return encKeyVersionQueue.getNext(encryptionKeyName);
} catch (ExecutionException e) {
if (e.getCause() instanceof SocketTimeoutException) {
throw (SocketTimeoutException)e.getCause();
}
throw new IOException(e);
}
}
@SuppressWarnings("rawtypes")
@Override
public KeyVersion decryptEncryptedKey(
EncryptedKeyVersion encryptedKeyVersion) throws IOException,
GeneralSecurityException {
checkNotNull(encryptedKeyVersion.getEncryptionKeyVersionName(),
"versionName");
checkNotNull(encryptedKeyVersion.getEncryptedKeyIv(), "iv");
Preconditions.checkArgument(
encryptedKeyVersion.getEncryptedKeyVersion().getVersionName()
.equals(KeyProviderCryptoExtension.EEK),
"encryptedKey version name must be '%s', is '%s'",
KeyProviderCryptoExtension.EEK,
encryptedKeyVersion.getEncryptedKeyVersion().getVersionName()
);
checkNotNull(encryptedKeyVersion.getEncryptedKeyVersion(), "encryptedKey");
Map<String, String> params = new HashMap<String, String>();
params.put(KMSRESTConstants.EEK_OP, KMSRESTConstants.EEK_DECRYPT);
Map<String, Object> jsonPayload = new HashMap<String, Object>();
jsonPayload.put(KMSRESTConstants.NAME_FIELD,
encryptedKeyVersion.getEncryptionKeyName());
jsonPayload.put(KMSRESTConstants.IV_FIELD, Base64.encodeBase64String(
encryptedKeyVersion.getEncryptedKeyIv()));
jsonPayload.put(KMSRESTConstants.MATERIAL_FIELD, Base64.encodeBase64String(
encryptedKeyVersion.getEncryptedKeyVersion().getMaterial()));
URL url = createURL(KMSRESTConstants.KEY_VERSION_RESOURCE,
encryptedKeyVersion.getEncryptionKeyVersionName(),
KMSRESTConstants.EEK_SUB_RESOURCE, params);
HttpURLConnection conn = createConnection(url, HTTP_POST);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
Map response =
call(conn, jsonPayload, HttpURLConnection.HTTP_OK, Map.class);
return parseJSONKeyVersion(response);
}
@Override
public EncryptedKeyVersion reencryptEncryptedKey(EncryptedKeyVersion ekv)
throws IOException, GeneralSecurityException {
checkNotNull(ekv.getEncryptionKeyVersionName(), "versionName");
checkNotNull(ekv.getEncryptedKeyIv(), "iv");
checkNotNull(ekv.getEncryptedKeyVersion(), "encryptedKey");
Preconditions.checkArgument(ekv.getEncryptedKeyVersion().getVersionName()
.equals(KeyProviderCryptoExtension.EEK),
"encryptedKey version name must be '%s', is '%s'",
KeyProviderCryptoExtension.EEK,
ekv.getEncryptedKeyVersion().getVersionName());
final Map<String, String> params = new HashMap<>();
params.put(KMSRESTConstants.EEK_OP, KMSRESTConstants.EEK_REENCRYPT);
final Map<String, Object> jsonPayload = new HashMap<>();
jsonPayload.put(KMSRESTConstants.NAME_FIELD, ekv.getEncryptionKeyName());
jsonPayload.put(KMSRESTConstants.IV_FIELD,
Base64.encodeBase64String(ekv.getEncryptedKeyIv()));
jsonPayload.put(KMSRESTConstants.MATERIAL_FIELD,
Base64.encodeBase64String(ekv.getEncryptedKeyVersion().getMaterial()));
final URL url = createURL(KMSRESTConstants.KEY_VERSION_RESOURCE,
ekv.getEncryptionKeyVersionName(), KMSRESTConstants.EEK_SUB_RESOURCE,
params);
final HttpURLConnection conn = createConnection(url, HTTP_POST);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
final Map response =
call(conn, jsonPayload, HttpURLConnection.HTTP_OK, Map.class);
return parseJSONEncKeyVersion(ekv.getEncryptionKeyName(), response);
}
@Override
public void reencryptEncryptedKeys(List<EncryptedKeyVersion> ekvs)
throws IOException, GeneralSecurityException {
checkNotNull(ekvs, "ekvs");
if (ekvs.isEmpty()) {
return;
}
final List<Map> jsonPayload = new ArrayList<>();
String keyName = null;
for (EncryptedKeyVersion ekv : ekvs) {
checkNotNull(ekv.getEncryptionKeyName(), "keyName");
checkNotNull(ekv.getEncryptionKeyVersionName(), "versionName");
checkNotNull(ekv.getEncryptedKeyIv(), "iv");
checkNotNull(ekv.getEncryptedKeyVersion(), "encryptedKey");
Preconditions.checkArgument(ekv.getEncryptedKeyVersion().getVersionName()
.equals(KeyProviderCryptoExtension.EEK),
"encryptedKey version name must be '%s', is '%s'",
KeyProviderCryptoExtension.EEK,
ekv.getEncryptedKeyVersion().getVersionName());
if (keyName == null) {
keyName = ekv.getEncryptionKeyName();
} else {
Preconditions.checkArgument(keyName.equals(ekv.getEncryptionKeyName()),
"All EncryptedKey must have the same key name.");
}
jsonPayload.add(KMSUtil.toJSON(ekv));
}
final URL url = createURL(KMSRESTConstants.KEY_RESOURCE, keyName,
KMSRESTConstants.REENCRYPT_BATCH_SUB_RESOURCE, null);
final HttpURLConnection conn = createConnection(url, HTTP_POST);
conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON_MIME);
final List<Map> response =
call(conn, jsonPayload, HttpURLConnection.HTTP_OK, List.class);
Preconditions.checkArgument(response.size() == ekvs.size(),
"Response size is different than input size.");
for (int i = 0; i < response.size(); ++i) {
final Map item = response.get(i);
final EncryptedKeyVersion ekv = parseJSONEncKeyVersion(keyName, item);
ekvs.set(i, ekv);
}
}
@Override
public List<KeyVersion> getKeyVersions(String name) throws IOException {
checkNotEmpty(name, "name");
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name,
KMSRESTConstants.VERSIONS_SUB_RESOURCE, null);
HttpURLConnection conn = createConnection(url, HTTP_GET);
List response = call(conn, null, HttpURLConnection.HTTP_OK, List.class);
List<KeyVersion> versions = null;
if (!response.isEmpty()) {
versions = new ArrayList<KeyVersion>();
for (Object obj : response) {
versions.add(parseJSONKeyVersion((Map) obj));
}
}
return versions;
}
@Override
public Metadata getMetadata(String name) throws IOException {
checkNotEmpty(name, "name");
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name,
KMSRESTConstants.METADATA_SUB_RESOURCE, null);
HttpURLConnection conn = createConnection(url, HTTP_GET);
Map response = call(conn, null, HttpURLConnection.HTTP_OK, Map.class);
return parseJSONMetadata(response);
}
@Override
public void deleteKey(String name) throws IOException {
checkNotEmpty(name, "name");
URL url = createURL(KMSRESTConstants.KEY_RESOURCE, name, null, null);
HttpURLConnection conn = createConnection(url, HTTP_DELETE);
call(conn, null, HttpURLConnection.HTTP_OK, null);
}
@Override
public void flush() throws IOException {
// NOP
// the client does not keep any local state, thus flushing is not required
// because of the client.
// the server should not keep in memory state on behalf of clients either.
}
@Override
public void warmUpEncryptedKeys(String... keyNames)
throws IOException {
try {
encKeyVersionQueue.initializeQueuesForKeys(keyNames);
} catch (ExecutionException e) {
throw new IOException(e);
}
}
@Override
public void drain(String keyName) {
encKeyVersionQueue.drain(keyName);
}
@VisibleForTesting
public int getEncKeyQueueSize(String keyName) {
return encKeyVersionQueue.getSize(keyName);
}
// note: this is only a crutch for backwards compatibility.
// override the instance that will be used to select a token, intended
// to allow load balancing provider to find a token issued by any of its
// sub-providers.
protected void setClientTokenProvider(
KeyProviderDelegationTokenExtension.DelegationTokenExtension provider) {
clientTokenProvider = provider;
}
@VisibleForTesting
DelegationTokenAuthenticatedURL createAuthenticatedURL() {
return new DelegationTokenAuthenticatedURL(configurator) {
@Override
public org.apache.hadoop.security.token.Token<? extends TokenIdentifier>
selectDelegationToken(URL url, Credentials creds) {
if (LOG.isDebugEnabled()) {
LOG.debug("Looking for delegation token. creds: {}",
creds.getAllTokens());
}
// clientTokenProvider is either "this" or a load balancing instance.
// if the latter, it will first look for the load balancer's uri
// service followed by each sub-provider for backwards-compatibility.
return clientTokenProvider.selectDelegationToken(creds);
}
};
}
@InterfaceAudience.Private
@Override
public Token<?> selectDelegationToken(Credentials creds) {
Token<?> token = selectDelegationToken(creds, dtService);
if (token == null) {
token = selectDelegationToken(creds, canonicalService);
}
return token;
}
protected static Token<?> selectDelegationToken(Credentials creds,
Text service) {
Token<?> token = creds.getToken(service);
LOG.debug("selected by alias={} token={}", service, token);
if (token != null && TOKEN_KIND.equals(token.getKind())) {
return token;
}
token = TokenSelector.INSTANCE.selectToken(service, creds.getAllTokens());
LOG.debug("selected by service={} token={}", service, token);
return token;
}
@Override
public String getCanonicalServiceName() {
return canonicalService.toString();
}
@Override
public Token<?> getDelegationToken(final String renewer) throws IOException {
final URL url = createURL(null, null, null, null);
final DelegationTokenAuthenticatedURL authUrl =
new DelegationTokenAuthenticatedURL(configurator);
Token<?> token = null;
try {
final String doAsUser = getDoAsUser();
token = getActualUgi().doAs(new PrivilegedExceptionAction<Token<?>>() {
@Override
public Token<?> run() throws Exception {
// Not using the cached token here.. Creating a new token here
// everytime.
LOG.debug("Getting new token from {}, renewer:{}", url, renewer);
return authUrl.getDelegationToken(url,
new DelegationTokenAuthenticatedURL.Token(), renewer, doAsUser);
}
});
if (token != null) {
token.setService(dtService);
LOG.info("New token created: ({})", token);
} else {
throw new IOException("Got NULL as delegation token");
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (Exception e) {
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new IOException(e);
}
}
return token;
}
@Override
public long renewDelegationToken(final Token<?> dToken) throws IOException {
try {
final String doAsUser = getDoAsUser();
final DelegationTokenAuthenticatedURL.Token token =
generateDelegationToken(dToken);
final URL url = createURL(null, null, null, null);
LOG.debug("Renewing delegation token {} with url:{}, as:{}",
token, url, doAsUser);
final DelegationTokenAuthenticatedURL authUrl =
createAuthenticatedURL();
return getActualUgi().doAs(
new PrivilegedExceptionAction<Long>() {
@Override
public Long run() throws Exception {
return authUrl.renewDelegationToken(url, token, doAsUser);
}
}
);
} catch (Exception ex) {
if (ex instanceof IOException) {
throw (IOException) ex;
} else {
throw new IOException(ex);
}
}
}
@Override
public Void cancelDelegationToken(final Token<?> dToken) throws IOException {
try {
final String doAsUser = getDoAsUser();
final DelegationTokenAuthenticatedURL.Token token =
generateDelegationToken(dToken);
return getActualUgi().doAs(
new PrivilegedExceptionAction<Void>() {
@Override
public Void run() throws Exception {
final URL url = createURL(null, null, null, null);
LOG.debug("Cancelling delegation token {} with url:{}, as:{}",
dToken, url, doAsUser);
final DelegationTokenAuthenticatedURL authUrl =
createAuthenticatedURL();
authUrl.cancelDelegationToken(url, token, doAsUser);
return null;
}
}
);
} catch (Exception ex) {
if (ex instanceof IOException) {
throw (IOException) ex;
} else {
throw new IOException(ex);
}
}
}
/**
* Get the doAs user name.
*
* 'actualUGI' is the UGI of the user creating the client
* It is possible that the creator of the KMSClientProvier
* calls this method on behalf of a proxyUser (the doAsUser).
* In which case this call has to be made as the proxy user.
*
* @return the doAs user name.
* @throws IOException
*/
private String getDoAsUser() throws IOException {
UserGroupInformation currentUgi = UserGroupInformation.getCurrentUser();
return (currentUgi.getAuthenticationMethod() ==
UserGroupInformation.AuthenticationMethod.PROXY)
? currentUgi.getShortUserName() : null;
}
/**
* Generate a DelegationTokenAuthenticatedURL.Token from the given generic
* typed delegation token.
*
* @param dToken The delegation token.
* @return The DelegationTokenAuthenticatedURL.Token, with its delegation
* token set to the delegation token passed in.
*/
private DelegationTokenAuthenticatedURL.Token generateDelegationToken(
final Token<?> dToken) {
DelegationTokenAuthenticatedURL.Token token =
new DelegationTokenAuthenticatedURL.Token();
Token<AbstractDelegationTokenIdentifier> dt =
new Token<>(dToken.getIdentifier(), dToken.getPassword(),
dToken.getKind(), dToken.getService());
token.setDelegationToken(dt);
return token;
}
private boolean containsKmsDt(UserGroupInformation ugi) throws IOException {
// Add existing credentials from the UGI, since provider is cached.
Credentials creds = ugi.getCredentials();
if (!creds.getAllTokens().isEmpty()) {
LOG.debug("Searching for KMS delegation token in user {}'s credentials",
ugi);
return clientTokenProvider.selectDelegationToken(creds) != null;
}
return false;
}
@VisibleForTesting
UserGroupInformation getActualUgi() throws IOException {
final UserGroupInformation currentUgi = UserGroupInformation
.getCurrentUser();
UserGroupInformation.logAllUserInfo(LOG, currentUgi);
// Use current user by default
UserGroupInformation actualUgi = currentUgi;
if (currentUgi.getRealUser() != null) {
// Use real user for proxy user
actualUgi = currentUgi.getRealUser();
}
if (UserGroupInformation.isSecurityEnabled() &&
!containsKmsDt(actualUgi) && !actualUgi.shouldRelogin()) {
// Use login user is only necessary when Kerberos is enabled
// but the actual user does not have either
// Kerberos credential or KMS delegation token for KMS operations
LOG.debug("Using loginUser when Kerberos is enabled but the actual user" +
" does not have either KMS Delegation Token or Kerberos Credentials");
actualUgi = UserGroupInformation.getLoginUser();
}
return actualUgi;
}
/**
* Shutdown valueQueue executor threads
*/
@Override
public void close() throws IOException {
try {
encKeyVersionQueue.shutdown();
} catch (Exception e) {
throw new IOException(e);
} finally {
if (sslFactory != null) {
sslFactory.destroy();
sslFactory = null;
}
}
}
@VisibleForTesting
String getKMSUrl() {
return kmsUrl.toString();
}
}
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