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publicshare.go
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publicshare.go
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// Copyright 2018-2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package scope
import (
"context"
"strings"
appprovider "github.com/cs3org/go-cs3apis/cs3/app/provider/v1beta1"
appregistry "github.com/cs3org/go-cs3apis/cs3/app/registry/v1beta1"
authpb "github.com/cs3org/go-cs3apis/cs3/auth/provider/v1beta1"
gateway "github.com/cs3org/go-cs3apis/cs3/gateway/v1beta1"
userv1beta1 "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
permissionsv1beta1 "github.com/cs3org/go-cs3apis/cs3/permissions/v1beta1"
collaboration "github.com/cs3org/go-cs3apis/cs3/sharing/collaboration/v1beta1"
link "github.com/cs3org/go-cs3apis/cs3/sharing/link/v1beta1"
provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
registry "github.com/cs3org/go-cs3apis/cs3/storage/registry/v1beta1"
types "github.com/cs3org/go-cs3apis/cs3/types/v1beta1"
"github.com/cs3org/reva/v2/pkg/errtypes"
"github.com/cs3org/reva/v2/pkg/utils"
"github.com/rs/zerolog"
)
// PublicStorageProviderID is the space id used for the public links storage space
const PublicStorageProviderID = "7993447f-687f-490d-875c-ac95e89a62a4"
func publicshareScope(ctx context.Context, scope *authpb.Scope, resource interface{}, logger *zerolog.Logger) (bool, error) {
var share link.PublicShare
err := utils.UnmarshalJSONToProtoV1(scope.Resource.Value, &share)
if err != nil {
return false, err
}
switch v := resource.(type) {
// Viewer role
case *registry.GetStorageProvidersRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *registry.ListStorageProvidersRequest:
ref := &provider.Reference{}
if v.Opaque != nil && v.Opaque.Map != nil {
if e, ok := v.Opaque.Map["storage_id"]; ok {
ref.ResourceId = &provider.ResourceId{
StorageId: string(e.Value),
}
}
if e, ok := v.Opaque.Map["opaque_id"]; ok {
if ref.ResourceId == nil {
ref.ResourceId = &provider.ResourceId{}
}
ref.ResourceId.OpaqueId = string(e.Value)
}
if e, ok := v.Opaque.Map["path"]; ok {
ref.Path = string(e.Value)
}
}
return checkStorageRef(ctx, &share, ref), nil
case *provider.CreateHomeRequest:
return false, nil
case *provider.GetPathRequest:
return checkStorageRef(ctx, &share, &provider.Reference{ResourceId: v.GetResourceId()}), nil
case *provider.StatRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.GetLockRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.UnlockRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.RefreshLockRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.SetLockRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.ListContainerRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.InitiateFileDownloadRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *appprovider.OpenInAppRequest:
return checkStorageRef(ctx, &share, &provider.Reference{ResourceId: v.ResourceInfo.Id}), nil
case *gateway.OpenInAppRequest:
return checkStorageRef(ctx, &share, v.GetRef()), nil
case *permissionsv1beta1.CheckPermissionRequest:
return true, nil
// Editor role
// need to return appropriate status codes in the ocs/ocdav layers.
case *provider.CreateContainerRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.TouchFileRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.DeleteRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.MoveRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetSource()) && checkStorageRef(ctx, &share, v.GetDestination()), nil
case *provider.InitiateFileUploadRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.SetArbitraryMetadataRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
case *provider.UnsetArbitraryMetadataRequest:
return hasRoleEditor(*scope) && checkStorageRef(ctx, &share, v.GetRef()), nil
// App provider requests
case *appregistry.GetDefaultAppProviderForMimeTypeRequest:
return true, nil
case *appregistry.GetAppProvidersRequest:
return true, nil
case *userv1beta1.GetUserByClaimRequest:
return true, nil
case *userv1beta1.GetUserRequest:
return true, nil
case *provider.ListStorageSpacesRequest:
return true, nil
case *link.GetPublicShareRequest:
return checkPublicShareRef(&share, v.GetRef()), nil
case *link.ListPublicSharesRequest:
// public links must not leak info about other links
return false, nil
case *collaboration.ListReceivedSharesRequest:
// public links must not leak info about collaborative shares
return false, nil
case string:
return checkResourcePath(v), nil
}
msg := "public resource type assertion failed"
logger.Debug().Str("scope", "publicshareScope").Interface("resource", resource).Msg(msg)
return false, errtypes.InternalError(msg)
}
func checkStorageRef(ctx context.Context, s *link.PublicShare, r *provider.Reference) bool {
// r: <resource_id:<storage_id:$storageID opaque_id:$opaqueID> path:$path > >
if utils.ResourceIDEqual(s.ResourceId, r.GetResourceId()) {
return true
}
// r: <path:"/public/$token" >
if strings.HasPrefix(r.GetPath(), "/public/"+s.Token) || strings.HasPrefix(r.GetPath(), "./"+s.Token) {
return true
}
// r: <resource_id:<storage_id: opaque_id:$token> path:$path>
if id := r.GetResourceId(); id.GetStorageId() == PublicStorageProviderID {
// access to /public
if id.GetOpaqueId() == PublicStorageProviderID {
return true
}
// access relative to /public/$token
if id.GetOpaqueId() == s.Token {
return true
}
}
return false
}
func checkPublicShareRef(s *link.PublicShare, ref *link.PublicShareReference) bool {
// ref: <token:$token >
return ref.GetToken() == s.Token
}
// AddPublicShareScope adds the scope to allow access to a public share and
// the shared resource.
func AddPublicShareScope(share *link.PublicShare, role authpb.Role, scopes map[string]*authpb.Scope) (map[string]*authpb.Scope, error) {
// Create a new "scope share" to only expose the required fields `ResourceId` and `Token` to the scope.
scopeShare := &link.PublicShare{ResourceId: share.ResourceId, Token: share.Token}
val, err := utils.MarshalProtoV1ToJSON(scopeShare)
if err != nil {
return nil, err
}
if scopes == nil {
scopes = make(map[string]*authpb.Scope)
}
scopes["publicshare:"+share.Id.OpaqueId] = &authpb.Scope{
Resource: &types.OpaqueEntry{
Decoder: "json",
Value: val,
},
Role: role,
}
return scopes, nil
}