-
Notifications
You must be signed in to change notification settings - Fork 113
/
ldap.go
106 lines (98 loc) · 3.47 KB
/
ldap.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
// Copyright 2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package utils
import (
"crypto/tls"
"crypto/x509"
"io/ioutil"
"github.com/cs3org/reva/v2/pkg/logger"
ldapReconnect "github.com/cs3org/reva/v2/pkg/utils/ldap"
"github.com/go-ldap/ldap/v3"
"github.com/pkg/errors"
)
// LDAPConn holds the basic parameter for setting up an
// LDAP connection.
type LDAPConn struct {
URI string `mapstructure:"uri"`
Insecure bool `mapstructure:"insecure"`
CACert string `mapstructure:"cacert"`
BindDN string `mapstructure:"bind_username"`
BindPassword string `mapstructure:"bind_password"`
}
// GetLDAPClientWithReconnect initializes a long-lived LDAP connection that
// automatically reconnects on connection errors. It allows to set TLS options
// e.g. to add trusted Certificates or disable Certificate verification
func GetLDAPClientWithReconnect(c *LDAPConn) (ldap.Client, error) {
var tlsConf *tls.Config
if c.Insecure {
logger.New().Warn().Msg("SSL Certificate verification is disabled. This is strongly discouraged for production environments.")
tlsConf = &tls.Config{
//nolint:gosec // We need the ability to run with "insecure" (dev/testing)
InsecureSkipVerify: true,
}
}
if !c.Insecure && c.CACert != "" {
if pemBytes, err := ioutil.ReadFile(c.CACert); err == nil {
rpool, _ := x509.SystemCertPool()
rpool.AppendCertsFromPEM(pemBytes)
tlsConf = &tls.Config{
RootCAs: rpool,
}
} else {
return nil, errors.Wrapf(err, "Error reading LDAP CA Cert '%s.'", c.CACert)
}
}
conn := ldapReconnect.NewLDAPWithReconnect(
ldapReconnect.Config{
URI: c.URI,
BindDN: c.BindDN,
BindPassword: c.BindPassword,
TLSConfig: tlsConf,
},
)
return conn, nil
}
// GetLDAPClientForAuth initializes an LDAP connection. The connection is not authenticated
// when returned. The main purpose for GetLDAPClientForAuth is to get and LDAP connection that
// can be used to issue a single bind request to authenticate a user.
func GetLDAPClientForAuth(c *LDAPConn) (ldap.Client, error) {
var tlsConf *tls.Config
if c.Insecure {
logger.New().Warn().Msg("SSL Certificate verification is disabled. Is is strongly discouraged for production environments.")
tlsConf = &tls.Config{
//nolint:gosec // We need the ability to run with "insecure" (dev/testing)
InsecureSkipVerify: true,
}
}
if !c.Insecure && c.CACert != "" {
if pemBytes, err := ioutil.ReadFile(c.CACert); err == nil {
rpool, _ := x509.SystemCertPool()
rpool.AppendCertsFromPEM(pemBytes)
tlsConf = &tls.Config{
RootCAs: rpool,
}
} else {
return nil, errors.Wrapf(err, "Error reading LDAP CA Cert '%s.'", c.CACert)
}
}
l, err := ldap.DialURL(c.URI, ldap.DialWithTLSConfig(tlsConf))
if err != nil {
return nil, err
}
return l, nil
}