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annotate pkg/auth/store.go @ 1017:a244b18cb916

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Added GNU Affero General Public License. Adjusted the headers of the Go files to be AGPLv3.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 23 Oct 2018 18:15:14 +0200
parents be8b79109679
children 20b9c3f261db
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1017
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package auth
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15
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16 import (
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17 "bytes"
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18 "errors"
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19 "log"
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20 "time"
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21
527
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22 bolt "github.com/etcd-io/bbolt"
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23 )
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24
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25 var ErrNoSuchToken = errors.New("No such token")
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26
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27 // Sessions is the global connection pool.
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28 var Sessions *SessionStore
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29
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30 type SessionStore struct {
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31 storage *bolt.DB
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32 sessions map[string]*Session
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33 cmds chan func()
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34 }
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35
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36 var sessionsBucket = []byte("sessions")
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37
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38 func NewSessionStore(filename string) (*SessionStore, error) {
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39
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40 ss := &SessionStore{
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41 sessions: make(map[string]*Session),
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42 cmds: make(chan func()),
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43 }
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44 if err := ss.openStorage(filename); err != nil {
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45 return nil, err
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46 }
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47 go ss.run()
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48 return ss, nil
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49 }
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50
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51 // openStorage opens a storage file.
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52 func (ss *SessionStore) openStorage(filename string) error {
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53
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54 // No file, nothing to restore/persist.
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55 if filename == "" {
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56 return nil
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57 }
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58
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59 db, err := bolt.Open(filename, 0600, nil)
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60 if err != nil {
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61 return err
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62 }
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63
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64 err = db.Update(func(tx *bolt.Tx) error {
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65 b, err := tx.CreateBucketIfNotExists(sessionsBucket)
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66 if err != nil {
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67 return err
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68 }
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69
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70 // pre-load sessions
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71 c := b.Cursor()
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72
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73 for k, v := c.First(); k != nil; k, v = c.Next() {
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74 var session Session
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75 if err := session.deserialize(bytes.NewReader(v)); err != nil {
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76 return err
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77 }
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78 ss.sessions[string(k)] = &session
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79 }
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80
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81 return nil
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82 })
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83
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84 if err != nil {
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85 db.Close()
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86 return err
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87 }
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88
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89 ss.storage = db
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90 return nil
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91 }
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92
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93 func (ss *SessionStore) run() {
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94 for {
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95 select {
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96 case cmd := <-ss.cmds:
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97 cmd()
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98 case <-time.After(time.Minute * 5):
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99 ss.cleanToken()
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100 }
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101 }
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102 }
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103
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104 func (ss *SessionStore) cleanToken() {
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105 now := time.Now()
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106 for token, session := range ss.sessions {
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107 expires := time.Unix(session.ExpiresAt, 0)
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108 if expires.Before(now) {
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109 delete(ss.sessions, token)
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110 ss.remove(token)
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111 }
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112 }
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113 }
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114
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115 func (ss *SessionStore) remove(token string) {
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116 if ss.storage == nil {
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117 return
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118 }
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119 err := ss.storage.Update(func(tx *bolt.Tx) error {
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120 b := tx.Bucket(sessionsBucket)
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121 return b.Delete([]byte(token))
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122 })
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123 if err != nil {
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124 log.Printf("error: %v\n", err)
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125 }
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126 }
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127
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128 func (ss *SessionStore) Delete(token string) bool {
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129 res := make(chan bool)
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130 ss.cmds <- func() {
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131 if _, found := ss.sessions[token]; !found {
193
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132 res <- false
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133 return
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diff changeset
134 }
513
b6796cd91604 Simplified the function channel inside the session store.
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diff changeset
135 delete(ss.sessions, token)
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diff changeset
136 ss.remove(token)
193
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diff changeset
137 res <- true
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diff changeset
138 }
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diff changeset
139 return <-res
190
3457a60fb12d Added stub for a persistent session store.
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140 }
3457a60fb12d Added stub for a persistent session store.
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141
513
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142 func (ss *SessionStore) store(token string, session *Session) {
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diff changeset
143 if ss.storage == nil {
204
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
144 return
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
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145 }
513
b6796cd91604 Simplified the function channel inside the session store.
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diff changeset
146 err := ss.storage.Update(func(tx *bolt.Tx) error {
200
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
147 b := tx.Bucket(sessionsBucket)
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diff changeset
148 var buf bytes.Buffer
498
22e1bf563a04 Throw away the connection level for sessions.
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diff changeset
149 if err := session.serialize(&buf); err != nil {
200
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
150 return err
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diff changeset
151 }
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diff changeset
152 return b.Put([]byte(token), buf.Bytes())
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diff changeset
153 })
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
154 if err != nil {
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diff changeset
155 log.Printf("error: %v\n", err)
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parents: 199
diff changeset
156 }
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
157 }
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
158
513
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diff changeset
159 func (ss *SessionStore) Add(token string, session *Session) {
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diff changeset
160 res := make(chan struct{})
199
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
161
513
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diff changeset
162 ss.cmds <- func() {
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diff changeset
163 defer close(res)
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diff changeset
164 s := ss.sessions[token]
498
22e1bf563a04 Throw away the connection level for sessions.
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diff changeset
165 if s == nil {
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diff changeset
166 s = session
513
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diff changeset
167 ss.sessions[token] = session
199
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
168 }
498
22e1bf563a04 Throw away the connection level for sessions.
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diff changeset
169 s.touch()
513
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diff changeset
170 ss.store(token, s)
199
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
171 }
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
172
513
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diff changeset
173 <-res
190
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
174 }
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parents:
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175
513
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diff changeset
176 func (ss *SessionStore) Renew(token string) (string, error) {
200
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
177
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diff changeset
178 type result struct {
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diff changeset
179 newToken string
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diff changeset
180 err error
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diff changeset
181 }
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
182
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diff changeset
183 resCh := make(chan result)
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diff changeset
184
513
b6796cd91604 Simplified the function channel inside the session store.
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diff changeset
185 ss.cmds <- func() {
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parents: 498
diff changeset
186 session := ss.sessions[token]
498
22e1bf563a04 Throw away the connection level for sessions.
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parents: 495
diff changeset
187 if session == nil {
200
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
188 resCh <- result{err: ErrNoSuchToken}
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
189 } else {
513
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
190 delete(ss.sessions, token)
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
191 ss.remove(token)
200
8426a92fda00 Persistent session store: Implmented Renew.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 199
diff changeset
192 newToken := GenerateSessionKey()
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
193 // TODO: Ensure that this is not racy!
498
22e1bf563a04 Throw away the connection level for sessions.
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parents: 495
diff changeset
194 session.ExpiresAt = time.Now().Add(maxTokenValid).Unix()
513
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
195 ss.sessions[newToken] = session
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
196 ss.store(newToken, session)
200
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
197 resCh <- result{newToken: newToken}
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
198 }
8426a92fda00 Persistent session store: Implmented Renew.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 199
diff changeset
199 }
8426a92fda00 Persistent session store: Implmented Renew.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 199
diff changeset
200
8426a92fda00 Persistent session store: Implmented Renew.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 199
diff changeset
201 r := <-resCh
8426a92fda00 Persistent session store: Implmented Renew.
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parents: 199
diff changeset
202 return r.newToken, r.err
190
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
203 }
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
204
513
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
205 func (ss *SessionStore) Session(token string) *Session {
202
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
206 res := make(chan *Session)
513
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
207 ss.cmds <- func() {
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
208 session := ss.sessions[token]
498
22e1bf563a04 Throw away the connection level for sessions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 495
diff changeset
209 if session == nil {
202
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
210 res <- nil
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
211 } else {
498
22e1bf563a04 Throw away the connection level for sessions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 495
diff changeset
212 session.touch()
513
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
213 ss.store(token, session)
498
22e1bf563a04 Throw away the connection level for sessions.
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parents: 495
diff changeset
214 res <- session
202
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
215 }
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
216 }
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
217 return <-res
190
3457a60fb12d Added stub for a persistent session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
218 }
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
219
513
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
220 func (ss *SessionStore) Logout(user string) {
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
221 ss.cmds <- func() {
b6796cd91604 Simplified the function channel inside the session store.
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parents: 498
diff changeset
222 for token, session := range ss.sessions {
498
22e1bf563a04 Throw away the connection level for sessions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 495
diff changeset
223 if session.User == user {
513
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
224 delete(ss.sessions, token)
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
225 ss.remove(token)
240
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
226 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
227 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
228 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
229 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
230
513
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
231 func (ss *SessionStore) Shutdown() error {
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
232 if db := ss.storage; db != nil {
614
be8b79109679 Fixed textual oversight from the session store refactoring.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 527
diff changeset
233 log.Println("info: shutdown persistent session store.")
513
b6796cd91604 Simplified the function channel inside the session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 498
diff changeset
234 ss.storage = nil
193
1585c334e8a7 More on persisting sessions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 190
diff changeset
235 return db.Close()
1585c334e8a7 More on persisting sessions.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 190
diff changeset
236 }
614
be8b79109679 Fixed textual oversight from the session store refactoring.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 527
diff changeset
237 log.Println("info: shutdown in-memory session store.")
190
3457a60fb12d Added stub for a persistent session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
238 return nil
3457a60fb12d Added stub for a persistent session store.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
239 }