[ aws . s3api ]



Returns the default encryption configuration for an Amazon S3 bucket. For information about the Amazon S3 default encryption feature, see Amazon S3 Default Bucket Encryption .

To use this operation, you must have permission to perform the s3:GetEncryptionConfiguration action. The bucket owner has this permission by default. The bucket owner can grant this permission to others. For more information about permissions, see Permissions Related to Bucket Subresource Operations and Managing Access Permissions to Your Amazon S3 Resources .

The following operations are related to GetBucketEncryption :

  • PutBucketEncryption

  • DeleteBucketEncryption

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.


--bucket <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]
[--cli-auto-prompt <value>]


--bucket (string)

The name of the bucket from which the server-side encryption configuration is retrieved.

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

--cli-auto-prompt (boolean) Automatically prompt for CLI input parameters.

See ‘aws help’ for descriptions of global parameters.


To retrieve the server-side encryption configuration for a bucket

The following get-bucket-encryption example retrieves the server-side encryption configuration for the bucket my-bucket.

aws s3api get-bucket-encryption \
    --bucket my-bucket


    "ServerSideEncryptionConfiguration": {
        "Rules": [
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "AES256"


ServerSideEncryptionConfiguration -> (structure)

Specifies the default server-side-encryption configuration.

Rules -> (list)

Container for information about a particular server-side encryption configuration rule.


Specifies the default server-side encryption configuration.

ApplyServerSideEncryptionByDefault -> (structure)

Specifies the default server-side encryption to apply to new objects in the bucket. If a PUT Object request doesn’t specify any server-side encryption, this default encryption will be applied.

SSEAlgorithm -> (string)

Server-side encryption algorithm to use for the default encryption.

KMSMasterKeyID -> (string)

AWS Key Management Service (KMS) customer master key ID to use for the default encryption. This parameter is allowed if and only if SSEAlgorithm is set to aws:kms .

You can specify the key ID or the Amazon Resource Name (ARN) of the CMK. However, if you are using encryption with cross-account operations, you must use a fully qualified CMK ARN. For more information, see Using encryption for cross-account operations .

For example:

  • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

  • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab


Amazon S3 only supports symmetric CMKs and not asymmetric CMKs. For more information, see Using Symmetric and Asymmetric Keys in the AWS Key Management Service Developer Guide .