Configuring Bucket Encryption

Functions

OBS uses the PUT method to create or update the default server-side encryption for a bucket.

After you configure encryption for a bucket, objects uploaded to this bucket will be encrypted with the bucket encryption settings you specified. Currently, OBS supports server-side encryption with KMS-managed keys (SSE-KMS). For details, see Server-Side Encryption.

To perform this operation, you must have the PutEncryptionConfiguration permission. By default, the bucket owner has this permission and can grant it to others.

Request Syntax (SSE-KMS AES256)

PUT /?encryption  HTTP/1.1
User-Agent: curl/7.29.0
Host: bucketname.obs.region.example.com
Accept: */*
Date: date 
Authorization: authorization string
Content-Length: length

<ServerSideEncryptionConfiguration>
    <Rule>
        <ApplyServerSideEncryptionByDefault>
            <SSEAlgorithm>kms</SSEAlgorithm>
            <KMSMasterKeyID>kmskeyid-value</KMSMasterKeyID>
        </ApplyServerSideEncryptionByDefault>
        
    </Rule>
</ServerSideEncryptionConfiguration>

Request Parameters

This request contains no message parameters.

Request Headers

This request uses common headers. For details, see Table 3.

Request Elements

In this request, you need to carry the bucket encryption configuration in the request body. The bucket encryption configuration information is uploaded in the XML format. Table 1 lists the configuration elements.

Table 1 Configuration elements of bucket encryption
Header	Description	Mandatory
ServerSideEncryptionConfiguration	Root element of the default encryption configuration of a bucket. Type: container Parent: none Child: Rule	Yes
Rule	Sub-element of the default encryption configuration of a bucket. Type: container Parent: ServerSideEncryptionConfiguration Child: ApplyServerSideEncryptionByDefault	Yes
ApplyServerSideEncryptionByDefault	Sub-element of the default encryption configuration of a bucket. Type: container Parent: Rule Child: SSEAlgorithm and KMSMasterKeyID	Yes
SSEAlgorithm	Server-side encryption algorithm used for the default encryption configuration of a bucket. Type: string Value options: kms: SSE-KMS encryption and the AES256 algorithm are used. AES256: SSE-OBS encryption and the AES256 algorithm are used. Parent: ApplyServerSideEncryptionByDefault	Yes
KMSMasterKeyID	Customer master key (CMK) used in SSE-KMS encryption mode. If you do not specify this header, the default master key will be used. Type: string Valid value formats are as follows: regionID:domainID:key/key_id key_id In the preceding formats: regionID indicates the ID of the region where the key belongs. domainID indicates the ID of the domain to which the key belongs. For details, see Obtaining a Domain ID and a User ID. key_id indicates the ID of the key created in DEW. Parent: ApplyServerSideEncryptionByDefault	No
ProjectID	ID of the project where the KMS master key belongs when SSE-KMS is used. If the project is not the default one, you must use this parameter to specify the project ID. Type: string Value options: Project ID that matches KMSMasterKeyID. If KMSMasterKeyID is not specified, do not set the project ID. Parent: ApplyServerSideEncryptionByDefault NOTE: When a custom key in a non-default IAM project is used to encrypt objects, only the key owner can upload or download the encrypted objects.	No

Response Syntax

HTTP/1.1 status_code
Date: date
Content-Length: length

Response Headers

The response to the request uses common headers. For details, see Table 1.

Response Elements

This response contains no elements.

Error Responses

No special error responses are returned. For details about error responses, see Table 2.

Sample Request (SSE-KMS AES256)

PUT /?encryption HTTP/1.1
User-Agent: curl/7.29.0
Host: examplebucket.obs.region.example.com
Accept: */*
Date:  Thu, 21 Feb 2019 03:05:34 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:DpSAlmLX/BTdjxU5HOEwflhM0WI=
Content-Length: 778

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<ServerSideEncryptionConfiguration xmlns="http://obs.region.example.com/doc/2015-06-30/">
    <Rule>
        <ApplyServerSideEncryptionByDefault>
            <SSEAlgorithm>kms</SSEAlgorithm>
            <KMSMasterKeyID>4f1cd4de-ab64-4807-920a-47fc42e7f0d0</KMSMasterKeyID>
        </ApplyServerSideEncryptionByDefault>
    </Rule>
</ServerSideEncryptionConfiguration>

Sample Response (SSE-KMS AES256)

HTTP/1.1 200 OK
Server: OBS
x-obs-request-id: BF26000001643670AC06E7B9A7767921
x-obs-id-2: 32AAAQAAEAABSAAgAAEAABAAAQAAEAABCSvK6z8HV6nrJh49gsB5vqzpgtohkiFm
Date: Thu, 21 Feb 2019 03:05:34 GMT
Content-Length: 0

Parent topic: Advanced Bucket Settings

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