minio/Bucket-Policy.md at 3de7f26e41d20400d469d3de4cc15d9552d80a97

Harshavardhana 88714e7c8e bucketpolicy: Improve bucket policy validation, avoid nested rules.

Bucket policy validation is more stricter now, to avoid nested
rules. The reason to do this is keep the rules simpler and more
meaningful avoiding conflicts.

This patch implements stricter checks.

Example policy to be generally avoided.
```
{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Action": [
				"s3:GetObject",
				"s3:DeleteObject"
			],
			"Effect": "Allow",
			"Principal": {
				"AWS": [
					"*"
				]
			},
			"Resource": [
				"arn:aws:s3:::jarjarbing/*"
			]
		},
		{
			"Action": [
				"s3:GetObject",
				"s3:DeleteObject"
			],
			"Effect": "Deny",
			"Principal": {
				"AWS": [
					"*"
				]
			},
			"Resource": [
				"arn:aws:s3:::jarjarbing/restic/key/*"
			]
		}
	]
}
```

2016-03-15 17:50:23 -07:00

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Access Policy

This package implements parsing and validating bucket access policies based on Access Policy Language specification - http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html

Supports following effects.

Allow
Deny

Supports following set of operations.

s3:GetObject
s3:ListBucket
s3:PutObject
s3:GetBucketLocation
s3:DeleteObject
s3:AbortMultipartUpload
s3:ListBucketMultipartUploads
s3:ListMultipartUploadParts

Supports following conditions.

StringEquals
StringNotEquals

Supported applicable condition keys for each conditions.

s3:prefix
s3:max-keys

Nested policy support.

Nested policies are not allowed.