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RemoveBucketIamConditionalBinding.java
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RemoveBucketIamConditionalBinding.java
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/*
* Copyright 2022 Google LLC
*
* 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 com.example.storage.bucket;
// [START storage_remove_bucket_conditional_iam_binding]
import com.google.cloud.Binding;
import com.google.cloud.Condition;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class RemoveBucketIamConditionalBinding {
/** Example of removing a conditional binding to the Bucket-level IAM */
public static void removeBucketIamConditionalBinding(String projectId, String bucketName) {
// The ID of your GCP project
// String projectId = "your-project-id";
// The ID of your GCS bucket
// String bucketName = "your-unique-bucket-name";
// For more information please read:
// https://cloud.google.com/storage/docs/access-control/iam
Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
Policy originalPolicy =
storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));
String role = "roles/storage.objectViewer";
// getBindingsList() returns an ImmutableList and copying over to an ArrayList so it's mutable.
List<Binding> bindings = new ArrayList(originalPolicy.getBindingsList());
// Create a condition to compare against
Condition.Builder conditionBuilder = Condition.newBuilder();
conditionBuilder.setTitle("Title");
conditionBuilder.setDescription("Description");
conditionBuilder.setExpression(
"resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")");
Iterator iterator = bindings.iterator();
while (iterator.hasNext()) {
Binding binding = (Binding) iterator.next();
boolean foundRole = binding.getRole().equals(role);
boolean conditionsEqual = conditionBuilder.build().equals(binding.getCondition());
// Remove condition when the role and condition are equal
if (foundRole && conditionsEqual) {
iterator.remove();
break;
}
}
// Update policy to remove conditional binding
Policy.Builder updatedPolicyBuilder = originalPolicy.toBuilder();
updatedPolicyBuilder.setBindings(bindings).setVersion(3);
Policy updatedPolicy = storage.setIamPolicy(bucketName, updatedPolicyBuilder.build());
System.out.println("Conditional Binding was removed.");
}
}
// [END storage_remove_bucket_conditional_iam_binding]