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
|
package authentication
import (
"errors"
"fmt"
"strconv"
"strings"
ber "github.com/go-asn1-ber/asn1-ber"
"github.com/go-ldap/ldap/v3"
"github.com/authelia/authelia/v4/internal/configuration/schema"
)
func ldapEntriesContainsEntry(needle *ldap.Entry, haystack []*ldap.Entry) bool {
if needle == nil || len(haystack) == 0 {
return false
}
for i := 0; i < len(haystack); i++ {
if haystack[i].DN == needle.DN {
return true
}
}
return false
}
func ldapGetFeatureSupportFromEntry(entry *ldap.Entry) (controlTypeOIDs, extensionOIDs []string, features LDAPSupportedFeatures) {
if entry == nil {
return controlTypeOIDs, extensionOIDs, features
}
for _, attr := range entry.Attributes {
switch attr.Name {
case ldapSupportedControlAttribute:
controlTypeOIDs = attr.Values
for _, oid := range attr.Values {
switch oid {
case ldapOIDControlMsftServerPolicyHints:
features.ControlTypes.MsftPwdPolHints = true
case ldapOIDControlMsftServerPolicyHintsDeprecated:
features.ControlTypes.MsftPwdPolHintsDeprecated = true
}
}
case ldapSupportedExtensionAttribute:
extensionOIDs = attr.Values
for _, oid := range attr.Values {
switch oid {
case ldapOIDExtensionPwdModifyExOp:
features.Extensions.PwdModifyExOp = true
case ldapOIDExtensionTLS:
features.Extensions.TLS = true
}
}
}
}
return controlTypeOIDs, extensionOIDs, features
}
func ldapEscape(inputUsername string) string {
inputUsername = ldap.EscapeFilter(inputUsername)
for _, c := range specialLDAPRunes {
inputUsername = strings.ReplaceAll(inputUsername, string(c), fmt.Sprintf("\\%c", c))
}
return inputUsername
}
func ldapGetReferral(err error) (referral string, ok bool) {
var e *ldap.Error
switch {
case errors.As(err, &e):
if e.ResultCode != ldap.LDAPResultReferral {
return "", false
}
if e.Packet == nil {
return "", false
}
if len(e.Packet.Children) < 2 {
return "", false
}
if e.Packet.Children[1].Tag != ber.TagObjectDescriptor {
return "", false
}
for i := 0; i < len(e.Packet.Children[1].Children); i++ {
if e.Packet.Children[1].Children[i].Tag != ber.TagBitString || len(e.Packet.Children[1].Children[i].Children) < 1 {
continue
}
referral, ok = e.Packet.Children[1].Children[i].Children[0].Value.(string)
if !ok {
continue
}
return referral, true
}
return "", false
default:
return "", false
}
}
func ldapGetErrorCode(err error) int {
var e *ldap.Error
if errors.As(err, &e) {
return int(e.ResultCode)
}
return -1
}
func getValueFromEntry(entry *ldap.Entry, attribute string) string {
if attribute == "" {
return ""
}
return entry.GetAttributeValue(attribute)
}
func getValuesFromEntry(entry *ldap.Entry, attribute string) []string {
if attribute == "" {
return nil
}
return entry.GetAttributeValues(attribute)
}
func getExtraValueFromEntry(entry *ldap.Entry, attribute string, properties schema.AuthenticationBackendLDAPAttributesAttribute) (value any, err error) {
if properties.MultiValued {
return getExtraValueMultiFromEntry(entry, attribute, properties)
}
str := getValueFromEntry(entry, attribute)
switch properties.ValueType {
case ValueTypeString:
value = str
case ValueTypeInteger:
if str == "" {
return nil, nil
}
if value, err = strconv.ParseFloat(str, 64); err != nil {
return nil, fmt.Errorf("cannot parse '%s' with value '%s' as integer: %w", attribute, str, err)
}
case ValueTypeBoolean:
if str == "" {
return nil, nil
}
if value, err = strconv.ParseBool(str); err != nil {
return nil, fmt.Errorf("cannot parse '%s' with value '%s' as boolean: %w", attribute, str, err)
}
}
return value, nil
}
func getExtraValueMultiFromEntry(entry *ldap.Entry, attribute string, properties schema.AuthenticationBackendLDAPAttributesAttribute) (value any, err error) {
if entry == nil {
return nil, fmt.Errorf("failed to get values from nil entry for attribute '%s'", attribute)
}
strs := getValuesFromEntry(entry, attribute)
values := make([]any, len(strs))
switch properties.GetValueType() {
case ValueTypeString:
for i, v := range strs {
values[i] = v
}
case ValueTypeInteger:
var v float64
for i, str := range strs {
if v, err = strconv.ParseFloat(str, 64); err != nil {
return nil, fmt.Errorf("cannot parse '%s' with value '%s' as integer: %w", attribute, str, err)
}
values[i] = v
}
case ValueTypeBoolean:
var v bool
for i, str := range strs {
if v, err = strconv.ParseBool(str); err != nil {
return nil, fmt.Errorf("cannot parse '%s' with value '%s' as boolean: %w", attribute, str, err)
}
values[i] = v
}
}
return values, nil
}
|
