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Amazon Simple Storage Service
Developer Guide (API Version 2006-03-01)

Specifying Permissions in a Policy

Amazon S3 defines a set of permissions that you can specify in a policy. These are keywords, each of which maps to specific Amazon S3 operations (see Operations on Buckets, and Operations on Objects in the Amazon Simple Storage Service API Reference).

This section provides a list of the permissions for object operations that you can specify in a policy.

Amazon S3 Permissions for Object Operations

Permissions Amazon S3 Operations
s3:AbortMultipartUpload Abort Multipart Upload
s3:DeleteObject DELETE Object

s3:DeleteObjectTagging

DELETE Object tagging
s3:DeleteObjectVersion DELETE Object (a Specific Version of the Object)

s3:DeleteObjectVersionTagging

DELETE Object tagging (for a Specific Version of the Object)
s3:GetObject

GET Object, HEAD Object, GET Object torrent

When you grant this permission on a version-enabled bucket, you always get the latest version data.

s3:GetObjectAcl GET Object ACL

s3:GetObjectTagging

GET Object tagging
s3:GetObjectTorrent GET Object torrent
s3:GetObjectVersion

GET Object, HEAD Object, GET Object torrent

To grant permission for version-specific object data, you must grant this permission. That is, when you specify version number when making any of these requests, you need this Amazon S3 permission.

s3:GetObjectVersionAcl GET ACL (for a Specific Version of the Object)

s3:GetObjectVersionTagging

GET Object tagging (for a Specific Version of the Object)
s3:GetObjectVersionTorrent GET Object Torrent versioning
s3:ListMultipartUploadParts List Parts
s3:PutObject

PUT Object, POST Object, Initiate Multipart Upload, Upload Part, Complete Multipart Upload, PUT Object - Copy

s3:PutObjectAcl PUT Object ACL

s3:PutObjectTagging

PUT Object tagging
s3:PutObjectVersionAcl PUT Object ACL (for a Specific Version of the Object)

s3:PutObjectVersionTagging

PUT Object tagging (for a Specific Version of the Object)

s3:RestoreObject

POST Object restore

The following example bucket policy grants the s3:PutObject and the s3:PutObjectAcl permissions to a user (Dave). If you remove the Principal element, you can attach the policy to a user. These are object operations, and accordingly the relative-id portion of the Resource ARN identifies objects (examplebucket/*). For more information, see Specifying Resources in a Policy.

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{ "Version": "2012-10-17", "Statement": [ { "Sid": "statement1", "Effect": "Allow", "Principal": { "AWS": "arn:aws:iam::AccountB-ID:user/Dave" }, "Action": ["s3:PutObject","s3:PutObjectAcl"], "Resource": "arn:aws:s3:::examplebucket/*" } ] }

You can use a wildcard to grant permission for all Amazon S3 actions.

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"Action": "*"

This section provides a list of the permissions related to bucket operations that you can specify in a policy.

Amazon S3 Permissions Related to Bucket Operations

Permission Keywords Amazon S3 Operation(s) Covered
s3:CreateBucket PUT Bucket
s3:DeleteBucket DELETE Bucket
s3:ListBucket GET Bucket (List Objects), HEAD Bucket
s3:ListBucketVersions GET Bucket Object versions
s3:ListAllMyBuckets GET Service
s3:ListBucketMultipartUploads List Multipart Uploads

The following example user policy grants the s3:CreateBucket, s3:ListAllMyBuckets, and the s3:GetBucketLocation permissions to a user. Note that for all these permissions, you set the relative-id part of the Resource ARN to "*". For all other bucket actions, you must specify a bucket name. For more information, see Specifying Resources in a Policy.

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{ "Version":"2012-10-17", "Statement":[ { "Sid":"statement1", "Effect":"Allow", "Action":[ "s3:CreateBucket", "s3:ListAllMyBuckets", "s3:GetBucketLocation" ], "Resource":[ "arn:aws:s3:::*" ] } ] }

Note that, if your user is going to use the console to view buckets, and see content of any of these buckets, the console will need the user to have the s3:ListAllMyBuckets and s3:GetBucketLocation permissions. For an example walkthrough, see An Example Walkthrough: Using user policies to control access to your bucket.

This section provides a list of the permissions related to bucket subresource operations that you can specify in a policy.

Amazon S3 Permissions Related to Bucket Subresource Operations

Permissions Amazon S3 Operation(s) Covered
s3:DeleteBucketPolicy DELETE Bucket policy
s3:DeleteBucketWebsite DELETE Bucket website
s3:DeleteReplicationConfiguration DELETE Bucket replication
s3:GetAccelerateConfiguration GET Bucket accelerate
s3:GetAnalyticsConfiguration GET Bucket analytics, List Bucket Analytics Configurations
s3:GetBucketAcl GET Bucket acl
s3:GetBucketCORS GET Bucket cors
s3:GetBucketLocation GET Bucket location
s3:GetBucketLogging GET Bucket logging
s3:GetBucketNotification GET Bucket notification
s3:GetBucketPolicy GET Bucket policy
s3:GetBucketRequestPayment GET Bucket requestPayment
s3:GetBucketTagging GET Bucket tagging
s3:GetBucketVersioning GET Bucket versioning
s3:GetBucketWebsite GET Bucket website
s3:GetInventoryConfiguration GET Bucket inventory, List Bucket Inventory Configurations
s3:GetLifecycleConfiguration GET Bucket lifecycle
s3:GetMetricsConfiguration GET Bucket metrics, List Bucket Metrics Configurations
s3:GetReplicationConfiguration GET Bucket replication
s3:PutAccelerateConfiguration PUT Bucket accelerate
s3:PutAnalyticsConfiguration PUT Bucket analytics, DELETE Bucket analytics
s3:PutBucketAcl PUT Bucket acl
s3:PutBucketCORS PUT Bucket cors
s3:PutBucketLogging PUT Bucket logging
s3:PutBucketNotification PUT Bucket notification
s3:PutBucketPolicy PUT Bucket policy
s3:PutBucketRequestPayment PUT Bucket requestPayment
s3:PutBucketTagging DELETE Bucket tagging, PUT Bucket tagging
s3:PutBucketVersioning PUT Bucket versioning
s3:PutBucketWebsite PUT Bucket website
s3:PutInventoryConfiguration PUT Bucket inventory, DELETE Bucket inventory
s3:PutLifecycleConfiguration PUT Bucket lifecycle
s3:PutMetricsConfiguration PUT Bucket metrics, DELETE Bucket metrics
s3:PutReplicationConfiguration PUT Bucket replication

The following user policy grants the s3:GetBucketAcl permission on the examplebucket bucket to user Dave.

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{ "Version": "2012-10-17", "Statement": [ { "Sid": "statement1", "Effect": "Allow", "Principal": { "AWS": "arn:aws:iam::Account-ID:user/Dave" }, "Action": [ "s3:GetObjectVersion", "s3:GetBucketAcl" ], "Resource": "arn:aws:s3:::examplebucket" } ] }

You can delete objects either by explicitly calling the DELETE Object API or by configuring its lifecycle (see Object Lifecycle Management) so that Amazon S3 can remove the objects when their lifetime expires. To explicitly block users or accounts from deleting objects, you must explicitly deny them s3:DeleteObject, s3:DeleteObjectVersion, and s3:PutLifecycleConfiguration permissions. Note that, by default, users have no permissions. But as you create users, add users to groups, and grant them permissions, it is possible for users to get certain permissions that you did not intend to give. That is where you can use explicit deny, which supersedes all other permissions a user might have and denies the user permissions for specific actions.