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demo.go
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demo.go
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// Copyright 2018-2022 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 demo
import (
"bytes"
"context"
"encoding/base64"
"encoding/gob"
auth "github.com/cs3org/go-cs3apis/cs3/auth/provider/v1beta1"
user "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
"github.com/cs3org/reva/pkg/token"
"github.com/cs3org/reva/pkg/token/manager/registry"
"github.com/pkg/errors"
)
func init() {
registry.Register("demo", New)
}
// New returns a new token manager.
func New(m map[string]interface{}) (token.Manager, error) {
mngr := manager{}
return &mngr, nil
}
type manager struct{}
type claims struct {
User *user.User `json:"user"`
Scope map[string]*auth.Scope `json:"scope"`
}
func (m *manager) MintToken(ctx context.Context, u *user.User, scope map[string]*auth.Scope) (string, error) {
token, err := encode(&claims{u, scope})
if err != nil {
return "", errors.Wrap(err, "error encoding user")
}
return token, nil
}
func (m *manager) DismantleToken(ctx context.Context, token string) (*user.User, map[string]*auth.Scope, error) {
c, err := decode(token)
if err != nil {
return nil, nil, errors.Wrap(err, "error decoding claims")
}
return c.User, c.Scope, nil
}
// from https://stackoverflow.com/questions/28020070/golang-serialize-and-deserialize-back
// go binary encoder.
func encode(c *claims) (string, error) {
b := bytes.Buffer{}
e := gob.NewEncoder(&b)
err := e.Encode(c)
if err != nil {
return "", err
}
return base64.StdEncoding.EncodeToString(b.Bytes()), nil
}
// from https://stackoverflow.com/questions/28020070/golang-serialize-and-deserialize-back
// go binary decoder.
func decode(token string) (*claims, error) {
c := &claims{}
by, err := base64.StdEncoding.DecodeString(token)
if err != nil {
return nil, err
}
b := bytes.Buffer{}
b.Write(by)
d := gob.NewDecoder(&b)
err = d.Decode(&c)
if err != nil {
return nil, err
}
return c, nil
}