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| 1 | +/* |
| 2 | + * SPDX-License-Identifier: Apache-2.0 |
| 3 | + * |
| 4 | + * The OpenSearch Contributors require contributions made to |
| 5 | + * this file be licensed under the Apache-2.0 license or a |
| 6 | + * compatible open source license. |
| 7 | + * |
| 8 | + * Modifications Copyright OpenSearch Contributors. See |
| 9 | + * GitHub history for details. |
| 10 | + */ |
| 11 | +package org.opensearch.security.privileges; |
| 12 | + |
| 13 | +import java.util.ArrayList; |
| 14 | +import java.util.Arrays; |
| 15 | +import java.util.HashSet; |
| 16 | +import java.util.List; |
| 17 | +import java.util.Map; |
| 18 | +import java.util.Set; |
| 19 | +import java.util.concurrent.TimeUnit; |
| 20 | + |
| 21 | +import org.opensearch.action.ActionRequest; |
| 22 | +import org.opensearch.action.admin.indices.segments.PitSegmentsRequest; |
| 23 | +import org.opensearch.action.search.CreatePitRequest; |
| 24 | +import org.opensearch.action.search.DeletePitRequest; |
| 25 | +import org.opensearch.cluster.metadata.IndexNameExpressionResolver; |
| 26 | +import org.opensearch.cluster.service.ClusterService; |
| 27 | +import org.opensearch.common.unit.TimeValue; |
| 28 | +import org.opensearch.security.OpenSearchSecurityPlugin; |
| 29 | +import org.opensearch.security.resolver.IndexResolverReplacer; |
| 30 | +import org.opensearch.security.securityconf.SecurityRoles; |
| 31 | +import org.opensearch.security.user.User; |
| 32 | + |
| 33 | + |
| 34 | +/** |
| 35 | + * This class evaluates privileges for point in time (Delete and List all) operations. |
| 36 | + * For aliases - users must have either alias permission or backing index permissions |
| 37 | + * For data streams - users must have access to backing indices permission + data streams permission. |
| 38 | + */ |
| 39 | +public class PitPrivilegesEvaluator { |
| 40 | + |
| 41 | + public PrivilegesEvaluatorResponse evaluate(final ActionRequest request, final ClusterService clusterService, |
| 42 | + final User user, final SecurityRoles securityRoles, final String action, |
| 43 | + final IndexNameExpressionResolver resolver, |
| 44 | + final PrivilegesEvaluatorResponse presponse, |
| 45 | + final IndexResolverReplacer irr) { |
| 46 | + |
| 47 | + if(!(request instanceof DeletePitRequest || request instanceof PitSegmentsRequest)) { |
| 48 | + return presponse; |
| 49 | + } |
| 50 | + List<String> pitIds = new ArrayList<>(); |
| 51 | + |
| 52 | + if (request instanceof DeletePitRequest) { |
| 53 | + DeletePitRequest deletePitRequest = (DeletePitRequest) request; |
| 54 | + pitIds = deletePitRequest.getPitIds(); |
| 55 | + } else if(request instanceof PitSegmentsRequest) { |
| 56 | + PitSegmentsRequest pitSegmentsRequest = (PitSegmentsRequest) request; |
| 57 | + pitIds = pitSegmentsRequest.getPitIds(); |
| 58 | + } |
| 59 | + // if request is for all PIT IDs, skip custom pit ids evaluation |
| 60 | + if (pitIds.size() == 1 && "_all".equals(pitIds.get(0))) { |
| 61 | + return presponse; |
| 62 | + } else { |
| 63 | + return handlePitsAccess(pitIds, clusterService, user, securityRoles, |
| 64 | + action, resolver, presponse, irr); |
| 65 | + } |
| 66 | + } |
| 67 | + |
| 68 | + /** |
| 69 | + * Handle access for delete operation / pit segments operation where PIT IDs are explicitly passed |
| 70 | + */ |
| 71 | + private PrivilegesEvaluatorResponse handlePitsAccess(List<String> pitIds, ClusterService clusterService, |
| 72 | + User user, SecurityRoles securityRoles, final String action, |
| 73 | + IndexNameExpressionResolver resolver, PrivilegesEvaluatorResponse presponse, |
| 74 | + final IndexResolverReplacer irr) { |
| 75 | + Map<String, String[]> pitToIndicesMap = OpenSearchSecurityPlugin. |
| 76 | + GuiceHolder.getPitService().getIndicesForPits(pitIds); |
| 77 | + Set<String> pitIndices = new HashSet<>(); |
| 78 | + // add indices across all PITs to a set and evaluate if user has access to all indices |
| 79 | + for(String[] indices: pitToIndicesMap.values()) { |
| 80 | + pitIndices.addAll(Arrays.asList(indices)); |
| 81 | + } |
| 82 | + Set<String> allPermittedIndices = getPermittedIndices(pitIndices, clusterService, user, |
| 83 | + securityRoles, action, resolver, irr); |
| 84 | + // Only if user has access to all PIT's indices, allow operation, otherwise continue evaluation in PrivilegesEvaluator. |
| 85 | + if(allPermittedIndices.containsAll(pitIndices)) { |
| 86 | + presponse.allowed = true; |
| 87 | + presponse.markComplete(); |
| 88 | + } |
| 89 | + return presponse; |
| 90 | + } |
| 91 | + |
| 92 | + /** |
| 93 | + * This method returns list of permitted indices for the PIT indices passed |
| 94 | + */ |
| 95 | + private Set<String> getPermittedIndices(Set<String> pitIndices, ClusterService clusterService, |
| 96 | + User user, SecurityRoles securityRoles, final String action, |
| 97 | + IndexNameExpressionResolver resolver, final IndexResolverReplacer irr) { |
| 98 | + String[] indicesArr = new String[pitIndices.size()]; |
| 99 | + CreatePitRequest req = new CreatePitRequest(new TimeValue(1, TimeUnit.DAYS), true, |
| 100 | + pitIndices.toArray(indicesArr)); |
| 101 | + final IndexResolverReplacer.Resolved pitResolved = irr.resolveRequest(req); |
| 102 | + return securityRoles.reduce(pitResolved, |
| 103 | + user, new String[]{action}, resolver, clusterService); |
| 104 | + } |
| 105 | +} |
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