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50 lines
1.4 KiB
50 lines
1.4 KiB
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package token implements encryption/decryption for json encoded interfaces
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package token
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import (
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"bytes"
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"encoding/json"
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"errors"
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"time"
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"github.com/fernet/fernet-go"
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)
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// Unmarshal decrypts a token using provided key
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// and decode the result into interface.
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func Unmarshal(token string, key string, v interface{}) error {
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k, _ := fernet.DecodeKey(key)
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msg := fernet.VerifyAndDecrypt([]byte(token), time.Hour, []*fernet.Key{k})
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if msg == nil {
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return errors.New("invalid or expired pagination token")
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}
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return json.NewDecoder(bytes.NewBuffer(msg)).Decode(&v)
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}
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// Marshal encodes an interface into json bytes and encrypts it.
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func Marshal(v interface{}, key string) ([]byte, error) {
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var buf bytes.Buffer
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err := json.NewEncoder(&buf).Encode(v)
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if err != nil {
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return nil, err
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}
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k, _ := fernet.DecodeKey(key)
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return fernet.EncryptAndSign(buf.Bytes(), k)
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}
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