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
|
/*
Unix SMB/CIFS implementation.
LDAP server
Copyright (C) Simo Sorce 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "ldap_parse.h"
char char_from_hex(char a, char b) {
char m, l;
if ('0' <= a && a <= '9') {
m = a - '0';
} else if ('A' <= a && a <= 'F') {
m = 10 + (a - 'A');
} else if ('a' <= a && a <= 'f') {
m = 10 + (a - 'a');
} else {
return a;
}
if ('0' <= b && b <= '9') {
l = b - '0';
} else if ('A' <= b && b <= 'F') {
l = 10 + (b - 'A');
} else if ('a' <= b && b <= 'f') {
l = 10 + (b - 'a');
} else {
return a;
}
return ((m << 4) + l);
}
char *parse_slash(char *p, char *end) {
switch (*(p + 1)) {
case ',':
case '=':
case '\n':
case '+':
case '<':
case '>':
case '#':
case ';':
case '\\':
case '"':
memmove(p, p + 1, end - (p + 1));
return (end - 1);
default:
*p = char_from_hex(*(p + 1), *(p + 2));
memmove(p + 1, p + 3, end - (p + 3));
return (end - 2);
}
}
struct ldap_dn *ldap_parse_dn(TALLOC_CTX *mem_ctx, const char *orig_dn)
{
struct ldap_dn *dn;
struct dn_component *component;
struct dn_attribute *attribute;
char *p, *start, *separator, *src, *dest, *dn_copy, *dn_end;
int i, size;
dn = talloc_p(mem_ctx, struct ldap_dn);
dn->comp_num = 0;
dn->components = talloc_array_p(dn, struct dn_component *, 1);
component = talloc_p(dn, struct dn_component);
component->attr_num = 0;
dn_copy = p = talloc_strdup(mem_ctx, orig_dn);
dn_end = dn_copy + strlen(orig_dn) + 1;
do {
component->attributes = talloc_array_p(component, struct dn_attribute *, 1);
attribute = talloc_p(component, struct dn_attribute);
/* skip "spaces" */
while (*p == ' ' || *p == '\n') {
p++;
}
/* start parsing this component */
do {
start = p;
/* find out key separator '=' */
while (*p && *p != '=') {
if (*p == '\\') {
dn_end = parse_slash(p, dn_end);
}
p++;
}
separator = p;
/* remove spaces */
while (*(p - 1) == ' ' || *(p - 1) == '\n') {
p--;
}
/* save key name */
attribute->name = talloc_strndup(attribute, start, p - start);
DEBUG(10, ("attribute name: [%s]\n", attribute->name));
p = separator + 1;
/* skip spaces past the separator */
p = separator + strspn(p, " \n") + 1;
start = p;
/* check if the value is enclosed in QUOTATION */
if (*p == '"') {
start = p + 1;
while (*p && *p != '"') {
if (*p == '\\') {
dn_end = parse_slash(p, dn_end);
}
p++;
}
/* skip spaces until the separator */
separator = p + strspn(p, " \n");
if (*separator != ',' && *separator != ';' && *separator != '+') { /* there must be a separator here */
/* Error Malformed DN */
DEBUG (0, ("Error: Malformed DN!\n"));
break;
}
} else {
while (*p && !(*p == ',' || *p == ';' || *p == '+')) {
if (*p == '\\') {
dn_end = parse_slash(p, dn_end);
}
p++;
} /* found separator */
separator = p;
/* remove spaces */
while (*(p - 1) == ' ' || *(p - 1) == '\n') {
p--;
}
}
/* save the value */
attribute->value = talloc_strndup(attribute, start, p - start);
DEBUG(10, ("attribute value: [%s]\n", attribute->value));
attribute->attribute = talloc_asprintf(attribute,"%s=%s", attribute->name, attribute->value);
DEBUG(10, ("attribute: [%s]\n", attribute->attribute));
/* save the attribute */
component->attributes[component->attr_num] = attribute;
component->attr_num++;
if (*separator == '+') { /* expect other attributes in this component */
component->attributes = talloc_realloc_p(component, component->attributes, struct dn_attribute *, component->attr_num + 1);
/* allocate new attribute structure */
attribute = talloc_p(component, struct dn_attribute);
/* skip spaces past the separator */
p = separator + strspn(p, " \n");
}
} while (*separator == '+');
/* found component bounds */
for (i = 0, size = 0; i < component->attr_num; i++) {
size = size + strlen(component->attributes[i]->attribute) + 1;
}
/* rebuild the normlaized component and put it here */
component->component = dest = talloc(component, size);
for (i = 0; i < component->attr_num; i++) {
if (i != 0) {
*dest = '+';
dest++;
}
src = component->attributes[i]->attribute;
do {
*(dest++) = *(src++);
} while(*src);
*dest = '\0';
}
DEBUG(10, ("component: [%s]\n", component->component));
dn->components[dn->comp_num] = component;
dn->comp_num++;
if (*separator == ',' || *separator == ';') {
dn->components = talloc_realloc_p(dn, dn->components, struct dn_component *, dn->comp_num + 1);
component = talloc_p(dn, struct dn_component);
component->attr_num = 0;
}
p = separator + 1;
} while(*separator == ',' || *separator == ';');
for (i = 0, size = 0; i < dn->comp_num; i++) {
size = size + strlen(dn->components[i]->component) + 1;
}
/* rebuild the normlaized dn and put it here */
dn->dn = dest = talloc(dn, size);
for (i = 0; i < dn->comp_num; i++) {
if (i != 0) {
*dest = ',';
dest++;
}
src = dn->components[i]->component;
do {
*(dest++) = *(src++);
} while(*src);
*dest = '\0';
}
DEBUG(10, ("dn: [%s]\n", dn->dn));
talloc_free(dn_copy);
return dn;
}
|
