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Copy pathacl-handlers.go
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280 lines (239 loc) · 8.42 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 (
"encoding/xml"
"io"
"net/http"
xhttp "github.com/minio/minio/internal/http"
"github.com/minio/minio/internal/logger"
"github.com/minio/mux"
"github.com/minio/pkg/bucket/policy"
)
// Data types used for returning dummy access control
// policy XML, these variables shouldn't be used elsewhere
// they are only defined to be used in this file alone.
type grantee struct {
XMLNS string `xml:"xmlns:xsi,attr"`
XMLXSI string `xml:"xsi:type,attr"`
Type string `xml:"Type"`
ID string `xml:"ID,omitempty"`
DisplayName string `xml:"DisplayName,omitempty"`
URI string `xml:"URI,omitempty"`
}
type grant struct {
Grantee grantee `xml:"Grantee"`
Permission string `xml:"Permission"`
}
type accessControlPolicy struct {
XMLName xml.Name `xml:"AccessControlPolicy"`
Owner Owner `xml:"Owner"`
AccessControlList struct {
Grants []grant `xml:"Grant"`
} `xml:"AccessControlList"`
}
// PutBucketACLHandler - PUT Bucket ACL
// -----------------
// This operation uses the ACL subresource
// to set ACL for a bucket, this is a dummy call
// only responds success if the ACL is private.
func (api objectAPIHandlers) PutBucketACLHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "PutBucketACL")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
// Allow putBucketACL if policy action is set, since this is a dummy call
// we are simply re-purposing the bucketPolicyAction.
if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Before proceeding validate if bucket exists.
_, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{})
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
aclHeader := r.Header.Get(xhttp.AmzACL)
if aclHeader == "" {
acl := &accessControlPolicy{}
if err = xmlDecoder(r.Body, acl, r.ContentLength); err != nil {
if terr, ok := err.(*xml.SyntaxError); ok && terr.Msg == io.EOF.Error() {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedXML),
r.URL)
return
}
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
if len(acl.AccessControlList.Grants) == 0 {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
if acl.AccessControlList.Grants[0].Permission != "FULL_CONTROL" {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
}
if aclHeader != "" && aclHeader != "private" {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
}
// GetBucketACLHandler - GET Bucket ACL
// -----------------
// This operation uses the ACL
// subresource to return the ACL of a specified bucket.
func (api objectAPIHandlers) GetBucketACLHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "GetBucketACL")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
// Allow getBucketACL if policy action is set, since this is a dummy call
// we are simply re-purposing the bucketPolicyAction.
if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Before proceeding validate if bucket exists.
_, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{})
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
acl := &accessControlPolicy{}
acl.AccessControlList.Grants = append(acl.AccessControlList.Grants, grant{
Grantee: grantee{
XMLNS: "http://www.w3.org/2001/XMLSchema-instance",
XMLXSI: "CanonicalUser",
Type: "CanonicalUser",
},
Permission: "FULL_CONTROL",
})
if err := xml.NewEncoder(w).Encode(acl); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
}
// PutObjectACLHandler - PUT Object ACL
// -----------------
// This operation uses the ACL subresource
// to set ACL for a bucket, this is a dummy call
// only responds success if the ACL is private.
func (api objectAPIHandlers) PutObjectACLHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "PutObjectACL")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
object, err := unescapePath(vars["object"])
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
// Allow putObjectACL if policy action is set, since this is a dummy call
// we are simply re-purposing the bucketPolicyAction.
if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Before proceeding validate if object exists.
_, err = objAPI.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
aclHeader := r.Header.Get(xhttp.AmzACL)
if aclHeader == "" {
acl := &accessControlPolicy{}
if err = xmlDecoder(r.Body, acl, r.ContentLength); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
if len(acl.AccessControlList.Grants) == 0 {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
if acl.AccessControlList.Grants[0].Permission != "FULL_CONTROL" {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
}
if aclHeader != "" && aclHeader != "private" {
writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
return
}
}
// GetObjectACLHandler - GET Object ACL
// -----------------
// This operation uses the ACL
// subresource to return the ACL of a specified object.
func (api objectAPIHandlers) GetObjectACLHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "GetObjectACL")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
object, err := unescapePath(vars["object"])
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
// Allow getObjectACL if policy action is set, since this is a dummy call
// we are simply re-purposing the bucketPolicyAction.
if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Before proceeding validate if object exists.
_, err = objAPI.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
acl := &accessControlPolicy{}
acl.AccessControlList.Grants = append(acl.AccessControlList.Grants, grant{
Grantee: grantee{
XMLNS: "http://www.w3.org/2001/XMLSchema-instance",
XMLXSI: "CanonicalUser",
Type: "CanonicalUser",
},
Permission: "FULL_CONTROL",
})
if err := xml.NewEncoder(w).Encode(acl); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
}