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minio/bucket-policy.go

151 lines
3.9 KiB

/*
* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"io/ioutil"
"os"
"path/filepath"
"github.com/minio/minio/pkg/probe"
)
// getBucketsConfigPath - get buckets path.
func getBucketsConfigPath() (string, *probe.Error) {
configPath, err := getConfigPath()
if err != nil {
return "", err.Trace()
}
return filepath.Join(configPath, "buckets"), nil
}
// createBucketsConfigPath - create buckets directory.
func createBucketsConfigPath() *probe.Error {
bucketsConfigPath, err := getBucketsConfigPath()
if err != nil {
return err
}
if e := os.MkdirAll(bucketsConfigPath, 0700); e != nil {
return probe.NewError(e)
}
return nil
}
// getBucketConfigPath - get bucket config path.
func getBucketConfigPath(bucket string) (string, *probe.Error) {
bucketsConfigPath, err := getBucketsConfigPath()
if err != nil {
return "", err.Trace()
}
return filepath.Join(bucketsConfigPath, bucket), nil
}
// createBucketConfigPath - create bucket config directory.
func createBucketConfigPath(bucket string) *probe.Error {
bucketConfigPath, err := getBucketConfigPath(bucket)
if err != nil {
return err
}
if e := os.MkdirAll(bucketConfigPath, 0700); e != nil {
return probe.NewError(e)
}
return nil
}
// readBucketPolicy - read bucket policy.
func readBucketPolicy(bucket string) ([]byte, *probe.Error) {
// Verify bucket is valid.
if !IsValidBucketName(bucket) {
return nil, probe.NewError(BucketNameInvalid{Bucket: bucket})
}
bucketConfigPath, err := getBucketConfigPath(bucket)
if err != nil {
return nil, err.Trace()
}
// Get policy file.
bucketPolicyFile := filepath.Join(bucketConfigPath, "access-policy.json")
if _, e := os.Stat(bucketPolicyFile); e != nil {
if os.IsNotExist(e) {
return nil, probe.NewError(BucketPolicyNotFound{Bucket: bucket})
}
return nil, probe.NewError(e)
}
accessPolicyBytes, e := ioutil.ReadFile(bucketPolicyFile)
if e != nil {
return nil, probe.NewError(e)
}
return accessPolicyBytes, nil
}
// removeBucketPolicy - remove bucket policy.
func removeBucketPolicy(bucket string) *probe.Error {
// Verify bucket is valid.
if !IsValidBucketName(bucket) {
return probe.NewError(BucketNameInvalid{Bucket: bucket})
}
bucketConfigPath, err := getBucketConfigPath(bucket)
if err != nil {
return err.Trace(bucket)
}
// Get policy file.
bucketPolicyFile := filepath.Join(bucketConfigPath, "access-policy.json")
if _, e := os.Stat(bucketPolicyFile); e != nil {
if os.IsNotExist(e) {
return probe.NewError(BucketPolicyNotFound{Bucket: bucket})
}
return probe.NewError(e)
}
return nil
}
// writeBucketPolicy - save bucket policy.
func writeBucketPolicy(bucket string, accessPolicyBytes []byte) *probe.Error {
// Verify if bucket path legal
if !IsValidBucketName(bucket) {
return probe.NewError(BucketNameInvalid{Bucket: bucket})
}
// Create bucket config path.
if err := createBucketConfigPath(bucket); err != nil {
return err.Trace()
}
bucketConfigPath, err := getBucketConfigPath(bucket)
if err != nil {
return err.Trace()
}
// Get policy file.
bucketPolicyFile := filepath.Join(bucketConfigPath, "access-policy.json")
if _, e := os.Stat(bucketPolicyFile); e != nil {
if !os.IsNotExist(e) {
return probe.NewError(e)
}
}
// Write bucket policy.
if e := ioutil.WriteFile(bucketPolicyFile, accessPolicyBytes, 0600); e != nil {
return probe.NewError(e)
}
return nil
}