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/*
*
* Copyright 2023 gRPC authors.
*
* 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.
*
*/
// Package token implements an example of authorization token encoding/decoding
// that can be used in RPC headers.
package token
import (
"encoding/base64"
"encoding/json"
)
// Token is a mock authorization token sent by the client as part of the RPC headers,
// and used by the server for authorization against a predefined policy.
type Token struct {
// Secret is used by the server to authenticate the user
Secret string `json:"secret"`
// Username is used by the server to assign roles in the metadata for authorization
Username string `json:"username"`
}
// Encode returns a base64 encoded version of the JSON representation of token.
func (t *Token) Encode() (string, error) {
barr, err := json.Marshal(t)
if err != nil {
return "", err
}
s := base64.StdEncoding.EncodeToString(barr)
return s, nil
}
// Decode updates the internals of Token using the passed in base64
// encoded version of the JSON representation of token.
func (t *Token) Decode(s string) error {
barr, err := base64.StdEncoding.DecodeString(s)
if err != nil {
return err
}
return json.Unmarshal(barr, t)
}
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