AWS::S3::BucketPolicy
The AWS::S3::BucketPolicy type applies an Amazon S3 bucket policy to an Amazon S3 bucket.
AWS::S3::BucketPolicy Snippet: Declaring an Amazon S3 Bucket Policy
Topics
Syntax
To declare this entity in your AWS CloudFormation template, use the following syntax:
JSON
{ "Type" : "AWS::S3::BucketPolicy", "Properties" : { "
Bucket
" :String
, "PolicyDocument
" :JSON
} }
YAML
Type: "AWS::S3::BucketPolicy" Properties:
Bucket
:String
PolicyDocument
:JSON
Properties
Bucket
-
The Amazon S3 bucket that the policy applies to.
Required: Yes
Type: String
You cannot update this property. If you want to add or remove a bucket from a bucket policy, you must modify your AWS CloudFormation template by creating a new bucket policy resource and removing the old one. Then use the modified template to update your AWS CloudFormation stack.
PolicyDocument
-
A policy document containing permissions to add to the specified bucket. For more information, see Access Policy Language Overview in the Amazon Simple Storage Service Developer Guide.
Required: Yes
Type: JSON object
Update requires: No interruption
Examples
Bucket policy that allows GET requests from specific referers
The following sample is a bucket policy that is attached to the
myExampleBucket
bucket and allows GET requests that originate from
www.example.com
and example.com
:
JSON
"SampleBucketPolicy" : { "Type" : "AWS::S3::BucketPolicy", "Properties" : { "Bucket" : {"Ref" : "myExampleBucket"}, "PolicyDocument": { "Statement":[{ "Action":["s3:GetObject"], "Effect":"Allow", "Resource": { "Fn::Join" : ["", ["arn:aws:s3:::", { "Ref" : "myExampleBucket" } , "/*" ]]}, "Principal":"*", "Condition":{ "StringLike":{ "aws:Referer":[ "http://www.example.com/*", "http://example.com/*" ] } } }] } } }
YAML
SampleBucketPolicy: Type: "AWS::S3::BucketPolicy" Properties: Bucket: Ref: "myExampleBucket" PolicyDocument: Statement: - Action: - "s3:GetObject" Effect: "Allow" Resource: Fn::Join: - "" - - "arn:aws:s3:::" - Ref: "myExampleBucket" - "/*" Principal: "*" Condition: StringLike: aws:Referer: - "http://www.example.com/*" - "http://example.com/*"