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
|
package main
import (
"fmt"
"strings"
ldap "./ldapserver"
message "github.com/vjeantet/goldap/message"
)
// Compare request -------------------------
func (server *Server) handleCompare(s ldap.UserState, w ldap.ResponseWriter, m *ldap.Message) {
state := s.(*State)
r := m.GetCompareRequest()
code, err := server.handleCompareInternal(state, &r)
res := ldap.NewResponse(code)
if err != nil {
res.SetDiagnosticMessage(err.Error())
}
w.Write(message.CompareResponse(res))
}
func (server *Server) handleCompareInternal(state *State, r *message.CompareRequest) (int, error) {
dn := string(r.Entry())
attr := string(r.Ava().AttributeDesc())
expected := string(r.Ava().AssertionValue())
_, err := server.checkSuffix(dn, false)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
// Check permissions
if !server.config.Acl.Check(&state.login, dn, "read", []string{attr}) {
return ldap.LDAPResultInsufficientAccessRights, nil
}
// Do query
exists, err := server.objectExists(dn)
if err != nil {
return ldap.LDAPResultOperationsError, err
}
if !exists {
return ldap.LDAPResultNoSuchObject, fmt.Errorf("Not found: %s", dn)
}
values, err := server.getAttribute(dn, attr)
if err != nil {
return ldap.LDAPResultOperationsError, err
}
for _, v := range values {
if v == expected {
return ldap.LDAPResultCompareTrue, nil
}
}
return ldap.LDAPResultCompareFalse, nil
}
// Search request -------------------------
func (server *Server) handleSearch(s ldap.UserState, w ldap.ResponseWriter, m *ldap.Message) {
state := s.(*State)
r := m.GetSearchRequest()
code, err := server.handleSearchInternal(state, w, &r)
res := ldap.NewResponse(code)
if err != nil {
res.SetDiagnosticMessage(err.Error())
}
w.Write(message.SearchResultDone(res))
}
func (server *Server) handleSearchInternal(state *State, w ldap.ResponseWriter, r *message.SearchRequest) (int, error) {
if DEBUG {
server.logger.Printf("-- SEARCH REQUEST: --")
server.logger.Printf("Request BaseDn=%s", r.BaseObject())
server.logger.Printf("Request Filter=%s", r.Filter())
server.logger.Printf("Request FilterString=%s", r.FilterString())
server.logger.Printf("Request Attributes=%s", r.Attributes())
server.logger.Printf("Request TimeLimit=%d", r.TimeLimit().Int())
}
if !server.config.Acl.Check(&state.login, "read", string(r.BaseObject()), []string{}) {
return ldap.LDAPResultInsufficientAccessRights, fmt.Errorf("Please specify a base object on which you have read rights")
}
baseObject, err := server.checkSuffix(string(r.BaseObject()), true)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
basePath, err := dnToConsul(baseObject)
if err != nil {
return ldap.LDAPResultInvalidDNSyntax, err
}
data, _, err := server.kv.List(basePath+"/", nil)
if err != nil {
return ldap.LDAPResultOperationsError, err
}
entries, err := parseConsulResult(data)
if err != nil {
return ldap.LDAPResultOperationsError, err
}
if DEBUG {
server.logger.Printf("in %s: %#v", basePath+"/", data)
server.logger.Printf("%#v", entries)
}
for dn, entry := range entries {
// Filter out if we don't match requested filter
matched, err := applyFilter(entry, r.Filter())
if err != nil {
return ldap.LDAPResultUnwillingToPerform, err
}
if !matched {
continue
}
// Filter out if user is not allowed to read this
if !server.config.Acl.Check(&state.login, "read", dn, []string{}) {
continue
}
e := ldap.NewSearchResultEntry(dn)
for attr, val := range entry {
// If attribute is not in request, exclude it from returned entry
if len(r.Attributes()) > 0 {
found := false
for _, requested := range r.Attributes() {
if strings.EqualFold(string(requested), attr) {
found = true
break
}
}
if !found {
continue
}
}
// If we are not allowed to read attribute, exclude it from returned entry
if !server.config.Acl.Check(&state.login, "read", dn, []string{attr}) {
continue
}
// Send result
for _, v := range val {
e.AddAttribute(message.AttributeDescription(attr),
message.AttributeValue(v))
}
}
w.Write(e)
}
return ldap.LDAPResultSuccess, nil
}
func applyFilter(entry Entry, filter message.Filter) (bool, error) {
if fAnd, ok := filter.(message.FilterAnd); ok {
for _, cond := range fAnd {
res, err := applyFilter(entry, cond)
if err != nil {
return false, err
}
if !res {
return false, nil
}
}
return true, nil
} else if fOr, ok := filter.(message.FilterOr); ok {
for _, cond := range fOr {
res, err := applyFilter(entry, cond)
if err != nil {
return false, err
}
if res {
return true, nil
}
}
return false, nil
} else if fNot, ok := filter.(message.FilterNot); ok {
res, err := applyFilter(entry, fNot.Filter)
if err != nil {
return false, err
}
return !res, nil
} else if fPresent, ok := filter.(message.FilterPresent); ok {
what := string(fPresent)
// Case insensitive search
for desc, values := range entry {
if strings.EqualFold(what, desc) {
return len(values) > 0, nil
}
}
return false, nil
} else if fEquality, ok := filter.(message.FilterEqualityMatch); ok {
desc := string(fEquality.AttributeDesc())
target := string(fEquality.AssertionValue())
// Case insensitive attribute search
for entry_desc, value := range entry {
if strings.EqualFold(entry_desc, desc) {
for _, val := range value {
if val == target {
return true, nil
}
}
return false, nil
}
}
return false, nil
} else {
return false, fmt.Errorf("Unsupported filter: %#v %T", filter, filter)
}
}
|
