Package software.amazon.awscdk.services.s3

Class CfnBucketPolicy

java.lang.Object
software.amazon.jsii.JsiiObject
software.constructs.Construct
software.amazon.awscdk.CfnElement
software.amazon.awscdk.CfnRefElement
software.amazon.awscdk.CfnResource
software.amazon.awscdk.services.s3.CfnBucketPolicy
All Implemented Interfaces:
IInspectable, IBucketPolicyRef, software.amazon.jsii.JsiiSerializable, software.constructs.IConstruct, software.constructs.IDependable
@Generated(value="jsii-pacmak/1.116.0 (build 0eddcff)", date="2025-10-24T13:34:46.187Z") @Stability(Stable) public class CfnBucketPolicy extends CfnResource implements IInspectable, IBucketPolicyRef
Applies an Amazon S3 bucket policy to an Amazon S3 bucket.

If you are using an identity other than the root user of the AWS account that owns the bucket, the calling identity must have the PutBucketPolicy permissions on the specified bucket and belong to the bucket owner's account in order to use this operation.

If you don't have PutBucketPolicy permissions, Amazon S3 returns a 403 Access Denied error. If you have the correct permissions, but you're not using an identity that belongs to the bucket owner's account, Amazon S3 returns a 405 Method Not Allowed error.

As a security precaution, the root user of the AWS account that owns a bucket can always use this operation, even if the policy explicitly denies the root user the ability to perform this action.

When using the AWS::S3::BucketPolicy resource, you can create, update, and delete bucket policies for S3 buckets located in Regions that are different from the stack's Region. However, the CloudFormation stacks should be deployed in the US East (N. Virginia) or us-east-1 Region. This cross-region bucket policy modification functionality is supported for backward compatibility with existing workflows.

If the DeletionPolicy attribute is not specified or set to Delete , the bucket policy will be removed when the stack is deleted. If set to Retain , the bucket policy will be preserved even after the stack is deleted.

For example, a CloudFormation stack in us-east-1 can use the AWS::S3::BucketPolicy resource to manage the bucket policy for an S3 bucket in us-west-2 . The retention or removal of the bucket policy during the stack deletion is determined by the DeletionPolicy attribute specified in the stack template.

For more information, see Bucket policy examples .

The following operations are related to PutBucketPolicy :

Example: 

 String bucketName = "amzn-s3-demo-bucket";
 Bucket accessLogsBucket = Bucket.Builder.create(this, "AccessLogsBucket")
         .objectOwnership(ObjectOwnership.BUCKET_OWNER_ENFORCED)
         .bucketName(bucketName)
         .build();
 // Creating a bucket policy using L1
 CfnBucketPolicy bucketPolicy = CfnBucketPolicy.Builder.create(this, "BucketPolicy")
         .bucket(bucketName)
         .policyDocument(Map.of(
                 "Statement", List.of(Map.of(
                         "Action", "s3:*",
                         "Effect", "Deny",
                         "Principal", Map.of(
                                 "AWS", "*"),
                         "Resource", List.of(accessLogsBucket.getBucketArn(), String.format("%s/*", accessLogsBucket.getBucketArn())))),
                 "Version", "2012-10-17"))
         .build();
 // 'serverAccessLogsBucket' will create a new L2 bucket policy
 // to allow log delivery and overwrite the L1 bucket policy.
 Bucket bucket = Bucket.Builder.create(this, "MyBucket")
         .serverAccessLogsBucket(accessLogsBucket)
         .serverAccessLogsPrefix("logs")
         .build();

See Also:

  • Field Details

    • CFN_RESOURCE_TYPE_NAME

      @Stability(Stable) public static final String CFN_RESOURCE_TYPE_NAME
      The CloudFormation resource type name for this resource class.

  • Constructor Details

    • CfnBucketPolicy

      protected CfnBucketPolicy(software.amazon.jsii.JsiiObjectRef objRef)

    • CfnBucketPolicy

      protected CfnBucketPolicy(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)

    • CfnBucketPolicy

      @Stability(Stable) public CfnBucketPolicy(@NotNull software.constructs.Construct scope, @NotNull String id, @NotNull CfnBucketPolicyProps props)
      Parameters:
      scope - Scope in which this resource is defined. This parameter is required.
      id - Construct identifier for this resource (unique in its scope). This parameter is required.
      props - Resource properties. This parameter is required.

  • Method Details

    • inspect

      @Stability(Stable) public void inspect(@NotNull TreeInspector inspector)
      Examines the CloudFormation resource and discloses attributes.

      Specified by:
      inspect in interface IInspectable
      Parameters:
      inspector - tree inspector to collect and process attributes. This parameter is required.

    • renderProperties

      @Stability(Stable) @NotNull protected Map<String,Object> renderProperties(@NotNull Map<String,Object> props)
      Overrides:
      renderProperties in class CfnResource
      Parameters:
      props - This parameter is required.

    • getBucketPolicyRef

      @Stability(Stable) @NotNull public BucketPolicyReference getBucketPolicyRef()
      A reference to a BucketPolicy resource.
      Specified by:
      getBucketPolicyRef in interface IBucketPolicyRef

    • getCfnProperties

      @Stability(Stable) @NotNull protected Map<String,Object> getCfnProperties()
      Overrides:
      getCfnProperties in class CfnResource

    • getBucket

      @Stability(Stable) @NotNull public String getBucket()
      The name of the Amazon S3 bucket to which the policy applies.

    • setBucket

      @Stability(Stable) public void setBucket(@NotNull String value)
      The name of the Amazon S3 bucket to which the policy applies.

    • getPolicyDocument

      @Stability(Stable) @NotNull public Object getPolicyDocument()
      A policy document containing permissions to add to the specified bucket.

    • setPolicyDocument

      @Stability(Stable) public void setPolicyDocument(@NotNull Object value)
      A policy document containing permissions to add to the specified bucket.