-
Notifications
You must be signed in to change notification settings - Fork 179
/
Copy pathpostgres.go
290 lines (228 loc) · 6.45 KB
/
postgres.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
package backends
import (
"database/sql"
"fmt"
"strconv"
"strings"
"github.com/iegomez/mosquitto-go-auth/backends/topics"
"github.com/iegomez/mosquitto-go-auth/hashing"
"github.com/jmoiron/sqlx"
_ "github.com/lib/pq"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
)
//Postgres holds all fields of the postgres db connection.
type Postgres struct {
DB *sqlx.DB
Host string
Port string
DBName string
User string
Password string
UserQuery string
SuperuserQuery string
AclQuery string
SSLMode string
SSLCert string
SSLKey string
SSLRootCert string
hasher hashing.HashComparer
maxLifeTime int64
connectTries int
}
func NewPostgres(authOpts map[string]string, logLevel log.Level, hasher hashing.HashComparer) (Postgres, error) {
log.SetLevel(logLevel)
//Set defaults for postgres
pgOk := true
missingOptions := ""
var postgres = Postgres{
Host: "localhost",
Port: "5432",
SSLMode: "verify-full",
SuperuserQuery: "",
AclQuery: "",
hasher: hasher,
}
if host, ok := authOpts["pg_host"]; ok {
postgres.Host = host
}
if port, ok := authOpts["pg_port"]; ok {
postgres.Port = port
}
if dbName, ok := authOpts["pg_dbname"]; ok {
postgres.DBName = dbName
} else {
pgOk = false
missingOptions += " pg_dbname"
}
if user, ok := authOpts["pg_user"]; ok {
postgres.User = user
} else {
pgOk = false
missingOptions += " pg_user"
}
if password, ok := authOpts["pg_password"]; ok {
postgres.Password = password
} else {
pgOk = false
missingOptions += " pg_password"
}
if userQuery, ok := authOpts["pg_userquery"]; ok {
postgres.UserQuery = userQuery
} else {
pgOk = false
missingOptions += " pg_userquery"
}
if superuserQuery, ok := authOpts["pg_superquery"]; ok {
postgres.SuperuserQuery = superuserQuery
}
if aclQuery, ok := authOpts["pg_aclquery"]; ok {
postgres.AclQuery = aclQuery
}
if sslmode, ok := authOpts["pg_sslmode"]; ok {
switch sslmode {
case "verify-full", "verify-ca", "require", "disable":
default:
log.Warnf("PG backend warning: using unknown pg_sslmode: '%s'", sslmode)
}
postgres.SSLMode = sslmode
} else {
postgres.SSLMode = "verify-full"
}
if sslCert, ok := authOpts["pg_sslcert"]; ok {
postgres.SSLCert = sslCert
}
if sslKey, ok := authOpts["pg_sslkey"]; ok {
postgres.SSLKey = sslKey
}
if sslRootCert, ok := authOpts["pg_sslrootcert"]; ok {
postgres.SSLRootCert = sslRootCert
}
//Exit if any mandatory option is missing.
if !pgOk {
return postgres, errors.Errorf("PG backend error: missing options: %s", missingOptions)
}
//Build the dsn string and try to connect to the db.
connStr := fmt.Sprintf("user=%s password=%s dbname=%s host=%s port=%s", postgres.User, postgres.Password, postgres.DBName, postgres.Host, postgres.Port)
switch postgres.SSLMode {
case "disable":
connStr = fmt.Sprintf("%s sslmode=disable", connStr)
case "require":
connStr = fmt.Sprintf("%s sslmode=require", connStr)
case "verify-ca":
connStr = fmt.Sprintf("%s sslmode=verify-ca", connStr)
case "verify-full":
fallthrough
default:
connStr = fmt.Sprintf("%s sslmode=verify-full", connStr)
}
if postgres.SSLRootCert != "" {
connStr = fmt.Sprintf("%s sslrootcert=%s", connStr, postgres.SSLRootCert)
}
if postgres.SSLKey != "" {
connStr = fmt.Sprintf("%s sslkey=%s", connStr, postgres.SSLKey)
}
if postgres.SSLCert != "" {
connStr = fmt.Sprintf("%s sslcert=%s", connStr, postgres.SSLCert)
}
if tries, ok := authOpts["pg_connect_tries"]; ok {
connectTries, err := strconv.Atoi(tries)
if err != nil {
log.Warnf("invalid postgres connect tries options: %s", err)
} else {
postgres.connectTries = connectTries
}
}
if maxLifeTime, ok := authOpts["pg_max_life_time"]; ok {
lifeTime, err := strconv.ParseInt(maxLifeTime, 10, 64)
if err == nil {
postgres.maxLifeTime = lifeTime
}
}
var err error
postgres.DB, err = OpenDatabase(connStr, "postgres", postgres.connectTries, postgres.maxLifeTime)
if err != nil {
return postgres, errors.Errorf("PG backend error: couldn't open db: %s", err)
}
return postgres, nil
}
//GetUser checks that the username exists and the given password hashes to the same password.
func (o Postgres) GetUser(username, password, clientid string) (bool, error) {
var pwHash sql.NullString
err := o.DB.Get(&pwHash, o.UserQuery, username)
if err != nil {
if err == sql.ErrNoRows {
// avoid leaking the fact that user exists or not though error.
return false, nil
}
log.Debugf("PG get user error: %s", err)
return false, err
}
if !pwHash.Valid {
log.Debugf("PG get user error: user %s not found", username)
return false, err
}
if o.hasher.Compare(password, pwHash.String) {
return true, nil
}
return false, nil
}
//GetSuperuser checks that the username meets the superuser query.
func (o Postgres) GetSuperuser(username string) (bool, error) {
//If there's no superuser query, return false.
if o.SuperuserQuery == "" {
return false, nil
}
var count sql.NullInt64
err := o.DB.Get(&count, o.SuperuserQuery, username)
if err != nil {
if err == sql.ErrNoRows {
// avoid leaking the fact that user exists or not though error.
return false, nil
}
log.Debugf("PG get superuser error: %s", err)
return false, err
}
if !count.Valid {
log.Debugf("PG get superuser error: user %s not found", username)
return false, nil
}
if count.Int64 > 0 {
return true, nil
}
return false, nil
}
//CheckAcl gets all acls for the username and tries to match against topic, acc, and username/clientid if needed.
func (o Postgres) CheckAcl(username, topic, clientid string, acc int32) (bool, error) {
//If there's no acl query, assume all privileges for all users.
if o.AclQuery == "" {
return true, nil
}
var acls []string
err := o.DB.Select(&acls, o.AclQuery, username, acc)
if err != nil {
log.Debugf("PG check acl error: %s", err)
return false, err
}
for _, acl := range acls {
aclTopic := strings.Replace(acl, "%c", clientid, -1)
aclTopic = strings.Replace(aclTopic, "%u", username, -1)
if topics.Match(aclTopic, topic) {
return true, nil
}
}
return false, nil
}
//GetName returns the backend's name
func (o Postgres) GetName() string {
return "Postgres"
}
//Halt closes the mysql connection.
func (o Postgres) Halt() {
if o.DB != nil {
err := o.DB.Close()
if err != nil {
log.Errorf("Postgres cleanup error: %s", err)
}
}
}