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owncloudsql.go
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owncloudsql.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 owncloudsql
import (
"context"
"database/sql"
"fmt"
"path"
"strconv"
"strings"
"time"
userpb "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
collaboration "github.com/cs3org/go-cs3apis/cs3/sharing/collaboration/v1beta1"
provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
typespb "github.com/cs3org/go-cs3apis/cs3/types/v1beta1"
ctxpkg "github.com/cs3org/reva/v2/pkg/ctx"
"github.com/cs3org/reva/v2/pkg/errtypes"
"github.com/cs3org/reva/v2/pkg/share"
"github.com/cs3org/reva/v2/pkg/share/manager/registry"
"github.com/cs3org/reva/v2/pkg/utils"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
"google.golang.org/genproto/protobuf/field_mask"
// Provides mysql drivers
_ "github.com/go-sql-driver/mysql"
)
const (
shareTypeUser = 0
shareTypeGroup = 1
)
func init() {
registry.Register("owncloudsql", NewMysql)
}
type config struct {
GatewayAddr string `mapstructure:"gateway_addr"`
StorageMountID string `mapstructure:"storage_mount_id"`
DbUsername string `mapstructure:"db_username"`
DbPassword string `mapstructure:"db_password"`
DbHost string `mapstructure:"db_host"`
DbPort int `mapstructure:"db_port"`
DbName string `mapstructure:"db_name"`
}
type mgr struct {
driver string
db *sql.DB
storageMountID string
userConverter UserConverter
}
// NewMysql returns a new share manager connection to a mysql database
func NewMysql(m map[string]interface{}) (share.Manager, error) {
c, err := parseConfig(m)
if err != nil {
err = errors.Wrap(err, "error creating a new manager")
return nil, err
}
db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", c.DbUsername, c.DbPassword, c.DbHost, c.DbPort, c.DbName))
if err != nil {
return nil, err
}
userConverter := NewGatewayUserConverter(c.GatewayAddr)
return New("mysql", db, c.StorageMountID, userConverter)
}
// New returns a new Cache instance connecting to the given sql.DB
func New(driver string, db *sql.DB, storageMountID string, userConverter UserConverter) (share.Manager, error) {
return &mgr{
driver: driver,
db: db,
storageMountID: storageMountID,
userConverter: userConverter,
}, nil
}
func parseConfig(m map[string]interface{}) (*config, error) {
c := &config{}
if err := mapstructure.Decode(m, c); err != nil {
return nil, err
}
return c, nil
}
func (m *mgr) Share(ctx context.Context, md *provider.ResourceInfo, g *collaboration.ShareGrant) (*collaboration.Share, error) {
user := ctxpkg.ContextMustGetUser(ctx)
// do not allow share to myself or the owner if share is for a user
// TODO(labkode): should not this be caught already at the gw level?
if g.Grantee.Type == provider.GranteeType_GRANTEE_TYPE_USER &&
(utils.UserEqual(g.Grantee.GetUserId(), user.Id) || utils.UserEqual(g.Grantee.GetUserId(), md.Owner)) {
return nil, errtypes.BadRequest("owncloudsql: owner/creator and grantee are the same")
}
// check if share already exists.
key := &collaboration.ShareKey{
Owner: md.Owner,
ResourceId: md.Id,
Grantee: g.Grantee,
}
_, err := m.getByKey(ctx, key)
// share already exists
if err == nil {
return nil, errtypes.AlreadyExists(key.String())
}
now := time.Now().Unix()
ts := &typespb.Timestamp{
Seconds: uint64(now),
}
owner, err := m.userConverter.UserIDToUserName(ctx, md.Owner)
if err != nil {
return nil, err
}
shareType, shareWith, err := m.formatGrantee(ctx, g.Grantee)
if err != nil {
return nil, err
}
itemType := resourceTypeToItem(md.Type)
targetPath := path.Join("/", path.Base(md.Path))
permissions := sharePermToInt(g.Permissions.Permissions)
itemSource := md.Id.OpaqueId
fileSource, err := strconv.ParseUint(itemSource, 10, 64)
if err != nil {
// it can be the case that the item source may be a character string
// we leave fileSource blank in that case
fileSource = 0
}
stmtString := "INSERT INTO oc_share (share_type,uid_owner,uid_initiator,item_type,item_source,file_source,permissions,stime,share_with,file_target) VALUES (?,?,?,?,?,?,?,?,?,?)"
stmtValues := []interface{}{shareType, owner, user.Username, itemType, itemSource, fileSource, permissions, now, shareWith, targetPath}
stmt, err := m.db.Prepare(stmtString)
if err != nil {
return nil, err
}
result, err := stmt.ExecContext(ctx, stmtValues...)
if err != nil {
return nil, err
}
lastID, err := result.LastInsertId()
if err != nil {
return nil, err
}
return &collaboration.Share{
Id: &collaboration.ShareId{
OpaqueId: strconv.FormatInt(lastID, 10),
},
ResourceId: md.Id,
Permissions: g.Permissions,
Grantee: g.Grantee,
Owner: md.Owner,
Creator: user.Id,
Ctime: ts,
Mtime: ts,
}, nil
}
func (m *mgr) GetShare(ctx context.Context, ref *collaboration.ShareReference) (*collaboration.Share, error) {
var s *collaboration.Share
var err error
switch {
case ref.GetId() != nil:
s, err = m.getByID(ctx, ref.GetId())
case ref.GetKey() != nil:
s, err = m.getByKey(ctx, ref.GetKey())
default:
err = errtypes.NotFound(ref.String())
}
if err != nil {
return nil, err
}
return s, nil
}
func (m *mgr) Unshare(ctx context.Context, ref *collaboration.ShareReference) error {
uid := ctxpkg.ContextMustGetUser(ctx).Username
var query string
params := []interface{}{}
switch {
case ref.GetId() != nil:
query = "DELETE FROM oc_share where id=? AND (uid_owner=? or uid_initiator=?)"
params = append(params, ref.GetId().OpaqueId, uid, uid)
case ref.GetKey() != nil:
key := ref.GetKey()
shareType, shareWith, err := m.formatGrantee(ctx, key.Grantee)
if err != nil {
return err
}
owner := formatUserID(key.Owner)
query = "DELETE FROM oc_share WHERE uid_owner=? AND file_source=? AND share_type=? AND share_with=? AND (uid_owner=? or uid_initiator=?)"
params = append(params, owner, key.ResourceId.OpaqueId, shareType, shareWith, uid, uid)
default:
return errtypes.NotFound(ref.String())
}
stmt, err := m.db.Prepare(query)
if err != nil {
return err
}
res, err := stmt.ExecContext(ctx, params...)
if err != nil {
return err
}
rowCnt, err := res.RowsAffected()
if err != nil {
return err
}
if rowCnt == 0 {
return errtypes.NotFound(ref.String())
}
return nil
}
func (m *mgr) UpdateShare(ctx context.Context, ref *collaboration.ShareReference, p *collaboration.SharePermissions, updated *collaboration.Share, fieldMask *field_mask.FieldMask) (*collaboration.Share, error) {
permissions := sharePermToInt(p.Permissions)
uid := ctxpkg.ContextMustGetUser(ctx).Username
var query string
params := []interface{}{}
switch {
case ref.GetId() != nil:
query = "update oc_share set permissions=?,stime=? where id=? AND (uid_owner=? or uid_initiator=?)"
params = append(params, permissions, time.Now().Unix(), ref.GetId().OpaqueId, uid, uid)
case ref.GetKey() != nil:
key := ref.GetKey()
shareType, shareWith, err := m.formatGrantee(ctx, key.Grantee)
if err != nil {
return nil, err
}
owner := formatUserID(key.Owner)
query = "update oc_share set permissions=?,stime=? where (uid_owner=? or uid_initiator=?) AND file_source=? AND share_type=? AND share_with=? AND (uid_owner=? or uid_initiator=?)"
params = append(params, permissions, time.Now().Unix(), owner, owner, key.ResourceId.OpaqueId, shareType, shareWith, uid, uid)
default:
return nil, errtypes.NotFound(ref.String())
}
stmt, err := m.db.Prepare(query)
if err != nil {
return nil, err
}
if _, err = stmt.ExecContext(ctx, params...); err != nil {
return nil, err
}
return m.GetShare(ctx, ref)
}
func (m *mgr) ListShares(ctx context.Context, filters []*collaboration.Filter) ([]*collaboration.Share, error) {
uid := ctxpkg.ContextMustGetUser(ctx).Username
query := `
SELECT
coalesce(s.uid_owner, '') as uid_owner, coalesce(s.uid_initiator, '') as uid_initiator,
coalesce(s.share_with, '') as share_with, coalesce(s.file_source, '') as file_source,
s.file_target, s.id, s.stime, s.permissions, s.share_type, fc.storage as storage
FROM oc_share s
LEFT JOIN oc_filecache fc ON fc.fileid = file_source
WHERE (uid_owner=? or uid_initiator=?)
`
params := []interface{}{uid, uid}
var (
filterQuery string
filterParams []interface{}
err error
)
if len(filters) == 0 {
filterQuery += "(share_type=? OR share_type=?)"
params = append(params, shareTypeUser)
params = append(params, shareTypeGroup)
} else {
filterQuery, filterParams, err = translateFilters(filters)
if err != nil {
return nil, err
}
params = append(params, filterParams...)
}
if filterQuery != "" {
query = fmt.Sprintf("%s AND (%s)", query, filterQuery)
}
rows, err := m.db.QueryContext(ctx, query, params...)
if err != nil {
return nil, err
}
defer rows.Close()
var s DBShare
shares := []*collaboration.Share{}
for rows.Next() {
if err := rows.Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.ID, &s.STime, &s.Permissions, &s.ShareType, &s.ItemStorage); err != nil {
continue
}
share, err := m.convertToCS3Share(ctx, s, m.storageMountID)
if err != nil {
return nil, err
}
shares = append(shares, share)
}
if err = rows.Err(); err != nil {
return nil, err
}
return shares, nil
}
// we list the shares that are targeted to the user in context or to the user groups.
func (m *mgr) ListReceivedShares(ctx context.Context, filters []*collaboration.Filter, forUser *userpb.UserId) ([]*collaboration.ReceivedShare, error) {
user := ctxpkg.ContextMustGetUser(ctx)
if user.GetId().GetType() == userpb.UserType_USER_TYPE_SERVICE {
u, err := m.userConverter.GetUser(forUser)
if err != nil {
return nil, errtypes.BadRequest("user not found")
}
user = u
}
uid := user.Username
params := []interface{}{uid, uid, uid}
for _, v := range user.Groups {
params = append(params, v)
}
homeConcat := ""
if m.driver == "mysql" { // mysql concat
homeConcat = "storages.id = CONCAT('home::', s.uid_owner)"
} else { // sqlite3 concat
homeConcat = "storages.id = 'home::' || s.uid_owner"
}
userSelect := ""
if len(user.Groups) > 0 {
userSelect = "AND ((share_type != 1 AND share_with=?) OR (share_type = 1 AND share_with in (?" + strings.Repeat(",?", len(user.Groups)-1) + ")))"
} else {
userSelect = "AND (share_type != 1 AND share_with=?)"
}
query := `
WITH results AS
(
SELECT s.*, storages.numeric_id FROM oc_share s
LEFT JOIN oc_storages storages ON ` + homeConcat + `
WHERE (uid_owner != ? AND uid_initiator != ?) ` + userSelect + `
)
SELECT COALESCE(r.uid_owner, '') AS uid_owner, COALESCE(r.uid_initiator, '') AS uid_initiator, COALESCE(r.share_with, '')
AS share_with, COALESCE(r.file_source, '') AS file_source, COALESCE(r2.file_target, r.file_target), r.id, r.stime, r.permissions, r.share_type, COALESCE(r2.accepted, r.accepted),
r.numeric_id, COALESCE(r.parent, -1) AS parent FROM results r LEFT JOIN results r2 ON r.id = r2.parent WHERE r.parent IS NULL`
filterQuery, filterParams, err := translateFilters(filters)
if err != nil {
return nil, err
}
params = append(params, filterParams...)
if filterQuery != "" {
query = fmt.Sprintf("%s AND (%s)", query, filterQuery)
}
query += ";"
rows, err := m.db.QueryContext(ctx, query, params...)
if err != nil {
return nil, err
}
defer rows.Close()
var s DBShare
shares := []*collaboration.ReceivedShare{}
for rows.Next() {
if err := rows.Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.ID, &s.STime, &s.Permissions, &s.ShareType, &s.State, &s.ItemStorage, &s.Parent); err != nil {
continue
}
share, err := m.convertToCS3ReceivedShare(ctx, s, m.storageMountID)
if err != nil {
return nil, err
}
shares = append(shares, share)
}
if err = rows.Err(); err != nil {
return nil, err
}
return shares, nil
}
func (m *mgr) GetReceivedShare(ctx context.Context, ref *collaboration.ShareReference) (*collaboration.ReceivedShare, error) {
var s *collaboration.ReceivedShare
var err error
switch {
case ref.GetId() != nil:
s, err = m.getReceivedByID(ctx, ref.GetId())
case ref.GetKey() != nil:
s, err = m.getReceivedByKey(ctx, ref.GetKey())
default:
err = errtypes.NotFound(ref.String())
}
if err != nil {
return nil, err
}
return s, nil
}
func (m *mgr) UpdateReceivedShare(ctx context.Context, receivedShare *collaboration.ReceivedShare, fieldMask *field_mask.FieldMask, _ *userpb.UserId) (*collaboration.ReceivedShare, error) {
// TODO: How to inject the uid when a UserId is set? override it in the ctx? Add parameter to GetReceivedShare?
rs, err := m.GetReceivedShare(ctx, &collaboration.ShareReference{Spec: &collaboration.ShareReference_Id{Id: receivedShare.Share.Id}})
if err != nil {
return nil, err
}
fields := []string{}
params := []interface{}{}
for i := range fieldMask.Paths {
switch fieldMask.Paths[i] {
case "state":
rs.State = receivedShare.State
fields = append(fields, "accepted=?")
switch rs.State {
case collaboration.ShareState_SHARE_STATE_REJECTED:
params = append(params, 2)
case collaboration.ShareState_SHARE_STATE_ACCEPTED:
params = append(params, 0)
}
case "mount_point":
fields = append(fields, "file_target=?")
rs.MountPoint = receivedShare.MountPoint
params = append(params, rs.MountPoint.Path)
case "hidden":
continue
default:
return nil, errtypes.NotSupported("updating " + fieldMask.Paths[i] + " is not supported")
}
}
if len(fields) == 0 {
return nil, fmt.Errorf("no valid field provided in the fieldmask")
}
updateReceivedShare := func(column string) error {
query := "update oc_share set "
query += strings.Join(fields, ",")
query += fmt.Sprintf(" where %s=?", column)
params := append(params, rs.Share.Id.OpaqueId)
stmt, err := m.db.Prepare(query)
if err != nil {
return err
}
res, err := stmt.ExecContext(ctx, params...)
if err != nil {
return err
}
affected, err := res.RowsAffected()
if err != nil {
return err
}
if affected < 1 {
return fmt.Errorf("No rows updated")
}
return nil
}
err = updateReceivedShare("parent") // Try to update the child state in case of group shares first
if err != nil {
err = updateReceivedShare("id")
}
if err != nil {
return nil, err
}
return rs, nil
}
func (m *mgr) getByID(ctx context.Context, id *collaboration.ShareId) (*collaboration.Share, error) {
uid := ctxpkg.ContextMustGetUser(ctx).Username
s := DBShare{ID: id.OpaqueId}
query := "select coalesce(uid_owner, '') as uid_owner, coalesce(uid_initiator, '') as uid_initiator, coalesce(share_with, '') as share_with, coalesce(file_source, '') as file_source, file_target, stime, permissions, share_type FROM oc_share WHERE id=? AND (uid_owner=? or uid_initiator=?)"
if err := m.db.QueryRowContext(ctx, query, id.OpaqueId, uid, uid).Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.STime, &s.Permissions, &s.ShareType); err != nil {
if err == sql.ErrNoRows {
return nil, errtypes.NotFound(id.OpaqueId)
}
return nil, err
}
return m.convertToCS3Share(ctx, s, m.storageMountID)
}
func (m *mgr) getByKey(ctx context.Context, key *collaboration.ShareKey) (*collaboration.Share, error) {
owner, err := m.userConverter.UserIDToUserName(ctx, key.Owner)
if err != nil {
return nil, err
}
uid := ctxpkg.ContextMustGetUser(ctx).Username
s := DBShare{}
shareType, shareWith, err := m.formatGrantee(ctx, key.Grantee)
if err != nil {
return nil, err
}
query := "select coalesce(uid_owner, '') as uid_owner, coalesce(uid_initiator, '') as uid_initiator, coalesce(share_with, '') as share_with, coalesce(file_source, '') as file_source, file_target, id, stime, permissions, share_type FROM oc_share WHERE uid_owner=? AND file_source=? AND share_type=? AND share_with=? AND (uid_owner=? or uid_initiator=?)"
if err = m.db.QueryRowContext(ctx, query, owner, key.ResourceId.StorageId, shareType, shareWith, uid, uid).Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.ID, &s.STime, &s.Permissions, &s.ShareType); err != nil {
if err == sql.ErrNoRows {
return nil, errtypes.NotFound(key.String())
}
return nil, err
}
return m.convertToCS3Share(ctx, s, m.storageMountID)
}
func (m *mgr) getReceivedByID(ctx context.Context, id *collaboration.ShareId) (*collaboration.ReceivedShare, error) {
user := ctxpkg.ContextMustGetUser(ctx)
uid := user.Username
params := []interface{}{id.OpaqueId, id.OpaqueId, uid}
for _, v := range user.Groups {
params = append(params, v)
}
homeConcat := ""
if m.driver == "mysql" { // mysql concat
homeConcat = "storages.id = CONCAT('home::', s.uid_owner)"
} else { // sqlite3 concat
homeConcat = "storages.id = 'home::' || s.uid_owner"
}
userSelect := ""
if len(user.Groups) > 0 {
userSelect = "AND ((share_type != 1 AND share_with=?) OR (share_type = 1 AND share_with in (?" + strings.Repeat(",?", len(user.Groups)-1) + ")))"
} else {
userSelect = "AND (share_type != 1 AND share_with=?)"
}
query := `
WITH results AS
(
SELECT s.*, storages.numeric_id
FROM oc_share s
LEFT JOIN oc_storages storages ON ` + homeConcat + `
WHERE s.id=? OR s.parent=? ` + userSelect + `
)
SELECT COALESCE(r.uid_owner, '') AS uid_owner, COALESCE(r.uid_initiator, '') AS uid_initiator, COALESCE(r.share_with, '')
AS share_with, COALESCE(r.file_source, '') AS file_source, COALESCE(r2.file_target, r.file_target), r.id, r.stime, r.permissions, r.share_type, COALESCE(r2.accepted, r.accepted),
r.numeric_id, COALESCE(r.parent, -1) AS parent
FROM results r
LEFT JOIN results r2 ON r.id = r2.parent
WHERE r.parent IS NULL;
`
s := DBShare{}
if err := m.db.QueryRowContext(ctx, query, params...).Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.ID, &s.STime, &s.Permissions, &s.ShareType, &s.State, &s.ItemStorage, &s.Parent); err != nil {
if err == sql.ErrNoRows {
return nil, errtypes.NotFound(id.OpaqueId)
}
return nil, err
}
return m.convertToCS3ReceivedShare(ctx, s, m.storageMountID)
}
func (m *mgr) getReceivedByKey(ctx context.Context, key *collaboration.ShareKey) (*collaboration.ReceivedShare, error) {
user := ctxpkg.ContextMustGetUser(ctx)
uid := user.Username
shareType, shareWith, err := m.formatGrantee(ctx, key.Grantee)
if err != nil {
return nil, err
}
params := []interface{}{uid, formatUserID(key.Owner), key.ResourceId.StorageId, key.ResourceId.OpaqueId, shareType, shareWith, shareWith}
for _, v := range user.Groups {
params = append(params, v)
}
s := DBShare{}
query := "select coalesce(uid_owner, '') as uid_owner, coalesce(uid_initiator, '') as uid_initiator, coalesce(share_with, '') as share_with, coalesce(file_source, '') as file_source, file_target, ts.id, stime, permissions, share_type, accepted FROM oc_share ts WHERE uid_owner=? AND file_source=? AND share_type=? AND share_with=? "
if len(user.Groups) > 0 {
query += "AND (share_with=? OR share_with in (?" + strings.Repeat(",?", len(user.Groups)-1) + "))"
} else {
query += "AND (share_with=?)"
}
if err := m.db.QueryRowContext(ctx, query, params...).Scan(&s.UIDOwner, &s.UIDInitiator, &s.ShareWith, &s.FileSource, &s.FileTarget, &s.ID, &s.STime, &s.Permissions, &s.ShareType, &s.State); err != nil {
if err == sql.ErrNoRows {
return nil, errtypes.NotFound(key.String())
}
return nil, err
}
return m.convertToCS3ReceivedShare(ctx, s, m.storageMountID)
}
func granteeTypeToShareType(granteeType provider.GranteeType) int {
switch granteeType {
case provider.GranteeType_GRANTEE_TYPE_USER:
return shareTypeUser
case provider.GranteeType_GRANTEE_TYPE_GROUP:
return shareTypeGroup
}
return -1
}
// translateFilters translates the filters to sql queries
func translateFilters(filters []*collaboration.Filter) (string, []interface{}, error) {
var (
filterQuery string
params []interface{}
)
groupedFilters := share.GroupFiltersByType(filters)
// If multiple filters of the same type are passed to this function, they need to be combined with the `OR` operator.
// That is why the filters got grouped by type.
// For every given filter type, iterate over the filters and if there are more than one combine them.
// Combine the different filter types using `AND`
var filterCounter = 0
for filterType, filters := range groupedFilters {
switch filterType {
case collaboration.Filter_TYPE_RESOURCE_ID:
filterQuery += "("
for i, f := range filters {
filterQuery += "file_source=?"
params = append(params, f.GetResourceId().OpaqueId)
if i != len(filters)-1 {
filterQuery += " OR "
}
}
filterQuery += ")"
case collaboration.Filter_TYPE_GRANTEE_TYPE:
filterQuery += "("
for i, f := range filters {
filterQuery += "r.share_type=?"
params = append(params, granteeTypeToShareType(f.GetGranteeType()))
if i != len(filters)-1 {
filterQuery += " OR "
}
}
filterQuery += ")"
case collaboration.Filter_TYPE_EXCLUDE_DENIALS:
// TODO this may change once the mapping of permission to share types is completed (cf. pkg/cbox/utils/conversions.go)
filterQuery += "r.permissions > 0"
default:
return "", nil, fmt.Errorf("filter type is not supported")
}
if filterCounter != len(groupedFilters)-1 {
filterQuery += " AND "
}
filterCounter++
}
return filterQuery, params, nil
}