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Continual IAM over AWS S3.
/*
* Copyright 2019, Continual.io
*
* 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.
*/
package io.continual.iam.impl.s3;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.AmazonS3Exception;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.ListObjectsRequest;
import com.amazonaws.services.s3.model.ObjectListing;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectSummary;
import io.continual.builder.Builder.BuildFailure;
import io.continual.iam.access.AccessControlList;
import io.continual.iam.access.AclUpdateListener;
import io.continual.iam.exceptions.IamBadRequestException;
import io.continual.iam.exceptions.IamIdentityDoesNotExist;
import io.continual.iam.exceptions.IamSvcException;
import io.continual.iam.identity.ApiKey;
import io.continual.iam.identity.JwtValidator;
import io.continual.iam.impl.common.CommonJsonApiKey;
import io.continual.iam.impl.common.CommonJsonDb;
import io.continual.iam.impl.common.CommonJsonGroup;
import io.continual.iam.impl.common.CommonJsonIdentity;
import io.continual.iam.impl.common.jwt.JwtProducer;
import io.continual.util.collections.LruCache;
import io.continual.util.data.StreamTools;
import io.continual.util.data.exprEval.EnvDataSource;
import io.continual.util.data.exprEval.ExpressionEvaluator;
import io.continual.util.data.exprEval.SpecialFnsDataSource;
import io.continual.util.data.json.CommentedJsonTokener;
import io.continual.util.data.json.JsonUtil;
import io.continual.util.data.json.JsonVisitor;
import io.continual.util.time.Clock;
public class S3IamDb extends CommonJsonDb
{
public static S3IamDb fromJson ( JSONObject config ) throws IamSvcException, BuildFailure
{
final ExpressionEvaluator ee = new ExpressionEvaluator ( new EnvDataSource (), new SpecialFnsDataSource () );
final JSONObject evaledConfig = ee.evaluateJsonObject ( config );
final String sysAdminGroup = evaledConfig.optString ( "sysAdminGroup", "sysadmin" );
Builder b = new Builder ()
.withAccessKey ( evaledConfig.getString ( "accessKey" ) )
.withSecretKey ( evaledConfig.getString ( "secretKey" ) )
.withBucket ( evaledConfig.getString ( "bucketId" ) )
.withPathPrefix ( evaledConfig.optString ( "pathPrefix", "" ) )
.usingAclFactory ( new AclFactory ()
{
@Override
public AccessControlList createDefaultAcl ( AclUpdateListener acll )
{
final AccessControlList acl = new AccessControlList ( acll );
acl
.permit ( sysAdminGroup, AccessControlList.READ )
.permit ( sysAdminGroup, AccessControlList.UPDATE )
.permit ( sysAdminGroup, AccessControlList.CREATE )
.permit ( sysAdminGroup, AccessControlList.DELETE )
;
return acl;
}
} )
;
final JSONObject jwt = evaledConfig.optJSONObject ( "jwt" );
if ( jwt != null )
{
final String jwtIssuer = jwt.optString ( "issuer", null );
final String jwtSecret = jwt.optString ( "sha256Key", null );
if ( jwtIssuer != null && jwtSecret != null )
{
b = b.withJwtProducer ( new JwtProducer.Builder ()
.withIssuerName ( jwtIssuer )
.usingSigningKey ( jwtSecret )
.build ()
);
}
}
// additional JWT validators
final JSONArray jwtv = evaledConfig.optJSONArray ( "jwtvalidators" );
if ( jwtv != null )
{
for ( int i=0; i jwtValidators = new LinkedList<> ();
}
@SuppressWarnings("deprecation")
protected S3IamDb ( String s3ApiKey, String s3PrivateKey, String bucket, String prefix, AclFactory aclFactory, JwtProducer jwtIssuer ) throws BuildFailure
{
super ( aclFactory, jwtIssuer );
if ( bucket == null || bucket.length () == 0 ) throw new BuildFailure ( "A bucket ID is required." );
if ( prefix == null ) prefix = "";
fDb = new AmazonS3Client ( new S3Creds ( s3ApiKey, s3PrivateKey ) );
fBucketId = bucket;
fPrefix = prefix;
fCache = new LruCache( 1024 ); // FIXME: clean caching
}
protected void findOrCreateBucket () throws IamSvcException
{
try
{
if ( !fDb.doesBucketExist ( fBucketId ) )
{
fDb.createBucket ( fBucketId );
}
}
catch ( AmazonClientException x )
{
throw new IamSvcException ( x );
}
}
public void close ()
{
fDb.shutdown ();
}
@Override
public Map loadAllUsers () throws IamSvcException
{
final HashMap result = new HashMap ();
for ( String userId : getAllUsers () )
{
result.put ( userId, loadUser ( userId ) );
}
return result;
}
@Override
public Collection getAllUsers () throws IamSvcException
{
final String prefix = concatPathParts ( getPrefix (), "users/" );
final LinkedList result = new LinkedList ();
for ( String key : loadKeysBelow ( prefix ) )
{
final String localPart = key.substring ( prefix.length () );
if ( localPart.length () > 0 )
{
result.add ( localPart );
}
}
return result;
}
@Override
public Collection getAllGroups () throws IamSvcException
{
final String prefix = concatPathParts ( getPrefix (), "groups/" );
final LinkedList result = new LinkedList ();
for ( String key : loadKeysBelow ( prefix ) )
{
final String localPart = key.substring ( prefix.length () );
if ( localPart.length () > 0 )
{
result.add ( localPart );
}
}
return result;
}
@Override
public List findUsers ( String startingWith ) throws IamSvcException
{
final String sysPrefix = concatPathParts ( getPrefix (), "users" );
final String prefix = concatPathParts ( sysPrefix, startingWith );
final List matches = loadKeysBelow ( prefix );
final LinkedList result = new LinkedList ();
for ( String match : matches )
{
result.add ( match.substring ( sysPrefix.length () + 1 ) );
}
return result;
}
@Override
public void sweepExpiredTags () throws IamSvcException
{
final TreeSet keys = new TreeSet ();
try
{
final String prefix = makeByTagId ( "" );
final ListObjectsRequest listObjectRequest = new ListObjectsRequest()
.withBucketName ( fBucketId )
.withPrefix ( prefix )
;
ObjectListing objects = fDb.listObjects ( listObjectRequest );
do
{
for ( S3ObjectSummary objectSummary : objects.getObjectSummaries () )
{
final String tagId = objectSummary.getKey ().substring ( prefix.length () );
keys.add ( tagId );
}
objects = fDb.listNextBatchOfObjects ( objects );
}
while ( objects.isTruncated () );
}
catch ( AmazonS3Exception x )
{
throw new IamSvcException ( x );
}
for ( String key : keys )
{
loadTagObject ( key, false );
}
}
private final AmazonS3Client fDb;
private final String fBucketId;
private final String fPrefix;
private final LruCache fCache;
private static final long kMaxCacheAgeMs = 1000 * 60;
String getPrefix ()
{
return fPrefix + "/";
}
String concatPathParts ( String... parts )
{
final StringBuilder sb = new StringBuilder ();
String last = null;
for ( String part : parts )
{
if ( last != null && !last.endsWith ( "/" ) )
{
sb.append ( "/" );
}
if ( part.startsWith ( "/" ) )
{
part = part.substring ( 1 );
}
sb.append ( part );
last = part;
}
return sb.toString ();
}
String makeUserId ( String userId )
{
return concatPathParts ( getPrefix (), "users/", userId );
}
String makeGroupId ( String groupId )
{
return concatPathParts ( getPrefix (), "groups/", groupId );
}
String makeByApiKeyId ( String apiKeyId )
{
return concatPathParts ( getPrefix (), "apikeys/byKey/", apiKeyId );
}
String makeByUserApiKeyId ( String userId, String apiKeyId )
{
return concatPathParts ( getPrefix (), "apikeys/byUser/", userId, apiKeyId );
}
String makeUserApiKeyFolderId ( String userId )
{
return concatPathParts ( getPrefix (), "apikeys/byUser/", userId );
}
String makeAclId ( String aclId )
{
return concatPathParts ( getPrefix (), "acls/", aclId );
}
String makeByTagId ( String tagId )
{
return concatPathParts ( getPrefix (), "tags/byTag/", tagId );
}
String makeByUserTagId ( String userId, String type )
{
return concatPathParts ( getPrefix (), "tags/byUser/", userId, type );
}
String makeByAliasId ( String alias )
{
return concatPathParts ( getPrefix (), "aliases/byKey/", alias );
}
String makeByUserAliasId ( String userId )
{
return concatPathParts ( getPrefix (), "aliases/byUser/", userId );
}
String makeJwtTokenId ( String token )
{
return concatPathParts ( getPrefix (), "invalidJwts/", token );
}
/**
* Load an object by key, returning the stream or null
* @param key
* @return a stream or null if not found
* @throws IamSvcException
*/
private InputStream load ( String key ) throws IamSvcException
{
final ByteArrayOutputStream baos = new ByteArrayOutputStream ();
if ( loadTo ( key, baos ) )
{
return new ByteArrayInputStream ( baos.toByteArray () );
}
return null;
}
/**
* Load an object by key, returning the object or null if not found
* @param key
* @return the object or null if not found
* @throws IamSvcException
*/
private JSONObject loadObject ( String key ) throws IamSvcException
{
final long startMs = Clock.now ();
try
{
final JSONObject cached = fCache.get ( key, kMaxCacheAgeMs );
if ( cached != null )
{
final long durMs = Clock.now () - startMs;
if ( log.isDebugEnabled () )
{
log.debug ( "S3IamDb.loadObject ( " + key + " ): from cache, " + durMs + " ms" );
}
return cached;
}
final InputStream is = load ( key );
if ( is == null ) return null;
final JSONObject result = new JSONObject ( new CommentedJsonTokener ( is ) );
fCache.put ( key, JsonUtil.clone ( result ) );
final long durMs = Clock.now () - startMs;
if ( log.isDebugEnabled () )
{
log.debug ( "S3IamDb.loadObject ( " + key + " ): from S3, " + durMs + " ms" );
}
return result;
}
catch ( JSONException e )
{
throw new IamSvcException ( e );
}
}
/**
* Load an object to a stream.
* @param key
* @param os
* @returns true if found, false if not found
* @throws IamSvcException
* @throws IamBadRequestException
*/
private boolean loadTo ( String key, OutputStream os ) throws IamSvcException
{
S3Object object = null;
try
{
object = fDb.getObject ( new GetObjectRequest ( fBucketId, key ) );
final InputStream is = object.getObjectContent ();
// s3 objects must be closed or will leak an HTTP connection
StreamTools.copyStream ( is, os );
return true;
}
catch ( AmazonServiceException x )
{
if ( 404 == x.getStatusCode () ) return false;
throw new IamSvcException ( x );
}
catch ( AmazonClientException x )
{
throw new IamSvcException ( x );
}
catch ( IOException x )
{
throw new IamSvcException ( x );
}
finally
{
if ( object != null )
{
try
{
object.close ();
}
catch ( IOException e )
{
throw new IamSvcException ( e );
}
}
}
}
List loadKeysBelow ( String key ) throws IamSvcException
{
final LinkedList result = new LinkedList ();
try
{
final ListObjectsRequest listObjectsRequest = new ListObjectsRequest ()
.withBucketName ( fBucketId )
.withPrefix ( key )
;
ObjectListing objectListing;
do
{
objectListing = fDb.listObjects ( listObjectsRequest );
for ( S3ObjectSummary objectSummary : objectListing.getObjectSummaries () )
{
result.add ( objectSummary.getKey () );
}
listObjectsRequest.setMarker ( objectListing.getNextMarker () );
}
while ( objectListing.isTruncated () );
}
catch ( AmazonClientException e )
{
throw new IamSvcException ( e );
}
return result;
}
void storeObject ( String key, JSONObject o ) throws IamSvcException
{
try
{
fCache.put ( key, JsonUtil.clone ( o ) );
final String data = o.toString ();
final InputStream is = new ByteArrayInputStream ( data.getBytes ( "UTF-8" ) );
final long length = data.length ();
final ObjectMetadata om = new ObjectMetadata ();
om.setContentLength ( length );
om.setContentType ( "application/json" );
fDb.putObject ( new PutObjectRequest ( fBucketId, key, is, om ) );
}
catch ( AmazonS3Exception x )
{
throw new IamSvcException ( x );
}
catch ( UnsupportedEncodingException e )
{
throw new IamSvcException ( e );
}
}
private void deleteObject ( String key ) throws IamSvcException
{
try
{
fCache.drop ( key );
fDb.deleteObject ( fBucketId, key );
}
catch ( AmazonS3Exception x )
{
throw new IamSvcException ( x );
}
}
private static class S3Creds implements AWSCredentials
{
public S3Creds ( String key, String secret )
{
fAccessKey = key;
fPrivateKey = secret;
}
@Override
public String getAWSAccessKeyId ()
{
return fAccessKey;
}
@Override
public String getAWSSecretKey ()
{
return fPrivateKey;
}
private final String fAccessKey;
private final String fPrivateKey;
}
//////////////////////////
@Override
protected JSONObject createNewUser ( String id )
{
return CommonJsonIdentity.initializeIdentity ();
}
@Override
protected JSONObject loadUserObject ( String id ) throws IamSvcException
{
return loadObject ( makeUserId ( id ) );
}
@Override
protected void storeUserObject ( String id, JSONObject data ) throws IamSvcException
{
storeObject ( makeUserId ( id ), data );
}
@Override
protected void deleteUserObject ( String id ) throws IamSvcException
{
deleteObject ( makeUserId ( id ) );
}
@Override
protected CommonJsonIdentity instantiateIdentity ( String id, JSONObject data )
{
return new CommonJsonIdentity ( id, data, this );
}
@Override
protected JSONObject createNewGroup ( String id, String groupDesc )
{
return CommonJsonGroup.initializeGroup ( groupDesc );
}
@Override
protected JSONObject loadGroupObject ( String id ) throws IamSvcException
{
return loadObject ( makeGroupId ( id ) );
}
@Override
protected void storeGroupObject ( String id, JSONObject data ) throws IamSvcException
{
storeObject ( makeGroupId ( id ), data );
}
@Override
protected void deleteGroupObject ( String id ) throws IamSvcException
{
deleteObject ( makeGroupId ( id ) );
}
@Override
protected CommonJsonGroup instantiateGroup ( String id, JSONObject data )
{
return new CommonJsonGroup ( id, data, this );
}
protected JSONObject createApiKeyObject ( String userId, String apiKey, String apiSecret )
{
return CommonJsonApiKey.initialize ( apiSecret, userId );
}
@Override
protected JSONObject loadApiKeyObject ( String id ) throws IamSvcException
{
return loadObject ( makeByApiKeyId ( id ) );
}
@Override
protected void storeApiKeyObject ( String id, JSONObject apiKeyObject ) throws IamSvcException, IamBadRequestException
{
final String userId = apiKeyObject.optString ( kUserId, null );
if ( userId == null ) throw new IamBadRequestException ( "no user specified for api key" );
// make sure the user exists
final JSONObject user = loadUserObject ( userId );
if ( user == null ) throw new IamIdentityDoesNotExist ( userId );
// store in apikeys section
storeObject ( makeByApiKeyId ( id ), apiKeyObject );
// store with user
JSONArray userApiKeys = user.optJSONArray ( "apiKeys" );
if ( userApiKeys == null )
{
userApiKeys = new JSONArray ();
user.put ( "apiKeys", userApiKeys );
}
final Set existing = new TreeSet ( JsonVisitor.arrayToList ( userApiKeys ) );
if ( !existing.contains ( id ) )
{
userApiKeys.put ( id );
storeUserObject ( userId, user );
}
}
@Override
protected void deleteApiKeyObject ( String id ) throws IamSvcException
{
final JSONObject apiKey = loadApiKeyObject ( id );
if ( apiKey != null )
{
final String userId = apiKey.getString ( kUserId );
final JSONObject user = loadUserObject ( userId );
final JSONArray userApiKeys = user.optJSONArray ( "apiKeys" );
if ( userApiKeys != null )
{
if ( JsonUtil.removeStringFromArray ( userApiKeys, id ) )
{
storeUserObject ( userId, user );
}
}
}
deleteObject ( makeByApiKeyId ( id ) );
}
@Override
protected ApiKey instantiateApiKey ( String id, JSONObject data )
{
return new CommonJsonApiKey ( id, data );
}
@Override
protected Collection loadApiKeysForUser ( String userId ) throws IamSvcException, IamIdentityDoesNotExist
{
// make sure the user exists
final JSONObject user = loadUserObject ( userId );
if ( user == null ) throw new IamIdentityDoesNotExist ( userId );
// read from user
JSONArray userApiKeys = user.optJSONArray ( "apiKeys" );
if ( userApiKeys != null )
{
return JsonVisitor.arrayToList ( userApiKeys );
}
return new LinkedList ();
}
@Override
protected JSONObject loadAclObject ( String id ) throws IamSvcException
{
return loadObject ( makeAclId ( id ) );
}
@Override
protected void storeAclObject ( String id, JSONObject data ) throws IamSvcException
{
storeObject ( makeAclId ( id ), data );
}
@Override
protected void deleteAclObject ( String id ) throws IamSvcException
{
deleteObject ( makeAclId ( id ) );
}
@Override
protected JSONObject loadTagObject ( String id, boolean expiredOk ) throws IamSvcException
{
final JSONObject entry = loadObject ( makeByTagId ( id ) );
if ( entry == null ) return null;
final long expireEpoch = entry.getLong ( kExpireEpoch );
if ( expireEpoch < ( Clock.now () / 1000L ) && !expiredOk )
{
final String userId = entry.optString ( kUserId, null );
final String tagType = entry.optString ( kTagType, entry.optString ( "type", null ) );
if ( userId == null || tagType == null )
{
log.warn ( "Tag " + id + " is damaged." );
}
else
{
deleteTagObject ( id, userId, tagType );
log.info ( "Tag " + id + " (" + userId + "/" + tagType + ") deleted." );
}
return null;
}
return entry;
}
@Override
protected JSONObject loadTagObject ( String userId, String appTagType, boolean expiredOk ) throws IamSvcException
{
final JSONObject entry = loadObject ( makeByUserTagId ( userId, appTagType ) );
if ( entry == null ) return null;
final long expireEpoch = entry.getLong ( kExpireEpoch );
if ( expireEpoch < ( Clock.now () / 1000L ) && !expiredOk )
{
removeMatchingTag ( userId, appTagType );
return null;
}
return entry;
}
@Override
protected void storeTagObject ( String id, String userId, String appTagType, JSONObject data ) throws IamSvcException
{
storeObject ( makeByTagId ( id ), data );
storeObject ( makeByUserTagId ( userId, appTagType ), data );
}
@Override
protected void deleteTagObject ( String id, String userId, String appTagType ) throws IamSvcException
{
deleteObject ( makeByTagId ( id ) );
deleteObject ( makeByUserTagId ( userId, appTagType ) );
}
@Override
protected JSONObject loadAliasObject ( String id ) throws IamSvcException
{
return loadObject ( makeByAliasId ( id ) );
}
@Override
protected void storeAliasObject ( String id, JSONObject aliasObject ) throws IamSvcException, IamBadRequestException
{
final String userId = aliasObject.optString ( kUserId, null );
if ( userId == null ) throw new IamBadRequestException ( "no user specified for alias" );
// make sure the user exists
final JSONObject user = loadUserObject ( userId );
if ( user == null ) throw new IamIdentityDoesNotExist ( userId );
// store in apikeys section
storeObject ( makeByAliasId ( id ), aliasObject );
// store with user
JSONArray userAliases = user.optJSONArray ( "aliases" );
if ( userAliases == null )
{
userAliases = new JSONArray ();
user.put ( "aliases", userAliases );
}
final Set existing = new TreeSet ( JsonVisitor.arrayToList ( userAliases ) );
if ( !existing.contains ( id ) )
{
userAliases.put ( id );
storeUserObject ( userId, user );
}
}
@Override
protected void deleteAliasObject ( String id ) throws IamSvcException
{
final JSONObject alias = loadAliasObject ( id );
if ( alias != null )
{
final String userId = alias.getString ( kUserId );
final JSONObject user = loadUserObject ( userId );
final JSONArray userAliases = user.optJSONArray ( "aliases" );
if ( userAliases != null )
{
if ( JsonUtil.removeStringFromArray ( userAliases, id ) )
{
storeUserObject ( userId, user );
}
}
}
deleteObject ( makeByAliasId ( id ) );
}
@Override
protected Collection loadAliasesForUser ( String userId ) throws IamSvcException, IamIdentityDoesNotExist
{
// make sure the user exists
final JSONObject user = loadUserObject ( userId );
if ( user == null ) throw new IamIdentityDoesNotExist ( userId );
// read from user
JSONArray userAliases = user.optJSONArray ( "aliases" );
if ( userAliases != null )
{
return JsonVisitor.arrayToList ( userAliases );
}
return new LinkedList ();
}
@Override
protected void storeInvalidJwtToken ( String token ) throws IamSvcException
{
storeObject ( makeJwtTokenId ( token ), new JSONObject () );
}
@Override
protected boolean isInvalidJwtToken ( String token ) throws IamSvcException
{
return null != loadObject ( makeJwtTokenId ( token ) );
}
private static final Logger log = LoggerFactory.getLogger ( S3IamDb.class );
}