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Copy pathbucket-policy-handlers.go
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211 lines (173 loc) · 6.09 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"encoding/json"
"io"
"net/http"
humanize "github.com/dustin/go-humanize"
"github.com/minio/madmin-go/v3"
"github.com/minio/minio/internal/logger"
"github.com/minio/mux"
"github.com/minio/pkg/v2/policy"
)
const (
// As per AWS S3 specification, 20KiB policy JSON data is allowed.
maxBucketPolicySize = 20 * humanize.KiByte
// Policy configuration file.
bucketPolicyConfig = "policy.json"
)
// PutBucketPolicyHandler - This HTTP handler stores given bucket policy configuration as per
// https://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "PutBucketPolicy")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Check if bucket exists.
if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Error out if Content-Length is missing.
// PutBucketPolicy always needs Content-Length.
if r.ContentLength <= 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
return
}
// Error out if Content-Length is beyond allowed size.
if r.ContentLength > maxBucketPolicySize {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPolicyTooLarge), r.URL)
return
}
bucketPolicyBytes, err := io.ReadAll(io.LimitReader(r.Body, r.ContentLength))
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
bucketPolicy, err := policy.ParseBucketPolicyConfig(bytes.NewReader(bucketPolicyBytes), bucket)
if err != nil {
writeErrorResponse(ctx, w, APIError{
Code: "MalformedPolicy",
HTTPStatusCode: http.StatusBadRequest,
Description: err.Error(),
}, r.URL)
return
}
// Version in policy must not be empty
if bucketPolicy.Version == "" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPolicyInvalidVersion), r.URL)
return
}
configData, err := json.Marshal(bucketPolicy)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
updatedAt, err := globalBucketMetadataSys.Update(ctx, bucket, bucketPolicyConfig, configData)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Call site replication hook.
logger.LogIf(ctx, globalSiteReplicationSys.BucketMetaHook(ctx, madmin.SRBucketMeta{
Type: madmin.SRBucketMetaTypePolicy,
Bucket: bucket,
Policy: bucketPolicyBytes,
UpdatedAt: updatedAt,
}))
// Success.
writeSuccessNoContent(w)
}
// DeleteBucketPolicyHandler - This HTTP handler removes bucket policy configuration.
func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "DeleteBucketPolicy")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
if s3Error := checkRequestAuthType(ctx, r, policy.DeleteBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Check if bucket exists.
if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
updatedAt, err := globalBucketMetadataSys.Delete(ctx, bucket, bucketPolicyConfig)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Call site replication hook.
logger.LogIf(ctx, globalSiteReplicationSys.BucketMetaHook(ctx, madmin.SRBucketMeta{
Type: madmin.SRBucketMetaTypePolicy,
Bucket: bucket,
UpdatedAt: updatedAt,
}))
// Success.
writeSuccessNoContent(w)
}
// GetBucketPolicyHandler - This HTTP handler returns bucket policy configuration.
func (api objectAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "GetBucketPolicy")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Check if bucket exists.
if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Read bucket access policy.
config, err := globalPolicySys.Get(bucket)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
configData, err := json.Marshal(config)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Write to client.
writeSuccessResponseJSON(w, configData)
}