72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
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// Copyright 2016 Nippon Telegraph and Telephone Corporation.
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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 auth
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// CAUTION: This randum number based token mechanism is only for testing purpose.
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// JWT based mechanism will be added in the near future.
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import (
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"crypto/rand"
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"math/big"
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)
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const (
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letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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defaultSimpleTokenLength = 16
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)
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var (
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simpleTokens map[string]string // token -> user ID
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)
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func init() {
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simpleTokens = make(map[string]string)
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}
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func genSimpleToken() (string, error) {
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ret := make([]byte, defaultSimpleTokenLength)
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for i := 0; i < defaultSimpleTokenLength; i++ {
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bInt, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
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if err != nil {
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return "", err
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}
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ret[i] = letters[bInt.Int64()]
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}
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return string(ret), nil
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}
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func genSimpleTokenForUser(userID string) (string, error) {
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var token string
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var err error
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for {
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// generating random numbers in RSM would't a good idea
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token, err = genSimpleToken()
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if err != nil {
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return "", err
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}
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if _, ok := simpleTokens[token]; !ok {
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break
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}
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}
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simpleTokens[token] = userID
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return token, nil
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}
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