Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Examples See Also

PutBucketPolicy

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.

Important

To ensure that bucket owners don't inadvertently lock themselves out of their own buckets, the root principal in a bucket owner's AWS account can perform the GetBucketPolicy, PutBucketPolicy, and DeleteBucketPolicy API actions, even if their bucket policy explicitly denies the root principal's access. Bucket owner root principals can only be blocked from performing these API actions by VPC endpoint policies and AWS Organizations policies.

For more information, see Bucket policy examples.

The following operations are related to PutBucketPolicy:

Request Syntax


PUT /?policy HTTP/1.1
Host: Bucket.s3.amazonaws.com
Content-MD5: ContentMD5
x-amz-sdk-checksum-algorithm: ChecksumAlgorithm
x-amz-confirm-remove-self-bucket-access: ConfirmRemoveSelfBucketAccess
x-amz-expected-bucket-owner: ExpectedBucketOwner

{ Policy in JSON format }

URI Request Parameters

The request uses the following URI parameters.

Bucket

The name of the bucket.

Required: Yes

Content-MD5

The MD5 hash of the request body.

For requests made using the AWS Command Line Interface (CLI) or AWS SDKs, this field is calculated automatically.

x-amz-confirm-remove-self-bucket-access

Set this parameter to true to confirm that you want to remove your permissions to change this bucket policy in the future.

x-amz-expected-bucket-owner

The account ID of the expected bucket owner. If the bucket is owned by a different account, the request fails with the HTTP status code 403 Forbidden (access denied).

x-amz-sdk-checksum-algorithm

Indicates the algorithm used to create the checksum for the object when using the SDK. This header will not provide any additional functionality if not using the SDK. When sending this header, there must be a corresponding x-amz-checksum or x-amz-trailer header sent. Otherwise, Amazon S3 fails the request with the HTTP status code 400 Bad Request. For more information, see Checking object integrity in the Amazon S3 User Guide.

If you provide an individual checksum, Amazon S3 ignores any provided ChecksumAlgorithm parameter.

Valid Values: CRC32 | CRC32C | SHA1 | SHA256

Request Body

The request accepts the following data in JSON format.

Policy

Response Syntax


HTTP/1.1 200

Response Elements

If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.

Examples

Sample Request

The following request shows the PUT individual policy request for the bucket.



PUT /?policy HTTP/1.1
Host: bucket.s3.<Region>.amazonaws.com  
Date: Tue, 04 Apr 2010 20:34:56 GMT  
Authorization: authorization string

{
"Version":"2008-10-17",
"Id":"aaaa-bbbb-cccc-dddd",
"Statement" : [
    {
        "Effect":"Allow",
        "Sid":"1", 
        "Principal" : {
            "AWS":["111122223333","444455556666"]
        },
        "Action":["s3:*"],
        "Resource":"arn:aws:s3:::bucket/*"
    }
 ] 
}

Sample Response

This example illustrates one usage of PutBucketPolicy.



HTTP/1.1 204 No Content  
x-amz-id-2: Uuag1LuByR5Onimru9SAMPLEAtRPfTaOFg==  
x-amz-request-id: 656c76696e6727732SAMPLE7374  
Date: Tue, 04 Apr 2010 20:34:56 GMT  
Connection: keep-alive  
Server: AmazonS3