Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : Python interface to ldb - utility functions.
5 :
6 : Copyright (C) 2007-2010 Jelmer Vernooij <jelmer@samba.org>
7 :
8 : ** NOTE! The following LGPL license applies to the ldb
9 : ** library. This does NOT imply that all of Samba is released
10 : ** under the LGPL
11 :
12 : This library is free software; you can redistribute it and/or
13 : modify it under the terms of the GNU Lesser General Public
14 : License as published by the Free Software Foundation; either
15 : version 3 of the License, or (at your option) any later version.
16 :
17 : This library is distributed in the hope that it will be useful,
18 : but WITHOUT ANY WARRANTY; without even the implied warranty of
19 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 : Lesser General Public License for more details.
21 :
22 : You should have received a copy of the GNU Lesser General Public
23 : License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 : */
25 :
26 : #include "lib/replace/system/python.h"
27 : #include "ldb.h"
28 : #include "pyldb.h"
29 :
30 : static PyObject *ldb_module = NULL;
31 :
32 : /**
33 : * Find out PyTypeObject in ldb module for a given typename
34 : */
35 89528112 : static PyTypeObject * PyLdb_GetPyType(const char *typename)
36 : {
37 89528112 : PyTypeObject *type = NULL;
38 76490956 : bool ok;
39 :
40 89528112 : if (ldb_module == NULL) {
41 3635 : ldb_module = PyImport_ImportModule("ldb");
42 3635 : if (ldb_module == NULL) {
43 0 : return NULL;
44 : }
45 : }
46 :
47 89528112 : type = (PyTypeObject *)PyObject_GetAttrString(ldb_module, typename);
48 :
49 :
50 89528112 : if (type == NULL) {
51 0 : PyErr_Format(PyExc_NameError,
52 : "Unable to find type %s in ldb module",
53 : typename);
54 0 : return NULL;
55 : }
56 :
57 89528112 : ok = PyType_Check(type);
58 89528112 : if (! ok) {
59 0 : PyErr_Format(PyExc_TypeError,
60 : "Expected type ldb.%s, not %s",
61 0 : typename, Py_TYPE(type)->tp_name);
62 0 : Py_DECREF(type);
63 0 : return NULL;
64 : }
65 :
66 13037156 : return type;
67 : }
68 :
69 63232120 : bool pyldb_check_type(PyObject *obj, const char *typename)
70 : {
71 63232120 : bool ok = false;
72 63232120 : PyTypeObject *type = PyLdb_GetPyType(typename);
73 63232120 : if (type != NULL) {
74 63232120 : ok = PyObject_TypeCheck(obj, type);
75 54009384 : Py_DECREF(type);
76 : }
77 63232120 : return ok;
78 : }
79 :
80 : /**
81 : * Obtain a ldb DN from a Python object.
82 : *
83 : * @param mem_ctx Memory context
84 : * @param object Python object
85 : * @param ldb_ctx LDB context
86 : * @return Whether or not the conversion succeeded
87 : */
88 4568401 : bool pyldb_Object_AsDn(TALLOC_CTX *mem_ctx, PyObject *object,
89 : struct ldb_context *ldb_ctx, struct ldb_dn **dn)
90 : {
91 3826649 : struct ldb_dn *odn;
92 3826649 : PyTypeObject *PyLdb_Dn_Type;
93 3826649 : bool is_dn;
94 :
95 4568401 : if (ldb_ctx != NULL && (PyUnicode_Check(object))) {
96 1640688 : const char *odn_str = NULL;
97 :
98 1640688 : odn_str = PyUnicode_AsUTF8(object);
99 1640688 : if (odn_str == NULL) {
100 0 : return false;
101 : }
102 :
103 1640688 : odn = ldb_dn_new(mem_ctx, ldb_ctx, odn_str);
104 1640688 : if (odn == NULL) {
105 0 : PyErr_NoMemory();
106 0 : return false;
107 : }
108 :
109 1640688 : *dn = odn;
110 1640688 : return true;
111 : }
112 :
113 2927713 : if (ldb_ctx != NULL && PyBytes_Check(object)) {
114 2463 : const char *odn_str = NULL;
115 :
116 2463 : odn_str = PyBytes_AsString(object);
117 2463 : if (odn_str == NULL) {
118 0 : return false;
119 : }
120 :
121 2463 : odn = ldb_dn_new(mem_ctx, ldb_ctx, odn_str);
122 2463 : if (odn == NULL) {
123 0 : PyErr_NoMemory();
124 0 : return false;
125 : }
126 :
127 2463 : *dn = odn;
128 2463 : return true;
129 : }
130 :
131 2925250 : PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
132 2925250 : if (PyLdb_Dn_Type == NULL) {
133 0 : PyErr_SetString(PyExc_TypeError, "Expected DN");
134 0 : return false;
135 : }
136 :
137 2925250 : is_dn = PyObject_TypeCheck(object, PyLdb_Dn_Type);
138 2424903 : Py_DECREF(PyLdb_Dn_Type);
139 2925250 : if (is_dn) {
140 2925248 : *dn = pyldb_Dn_AS_DN(object);
141 2925248 : return true;
142 : }
143 :
144 2 : PyErr_SetString(PyExc_TypeError, "Expected DN");
145 2 : return false;
146 : }
147 :
148 23370742 : PyObject *pyldb_Dn_FromDn(struct ldb_dn *dn, PyLdbObject *pyldb)
149 : {
150 23370742 : TALLOC_CTX *mem_ctx = NULL;
151 23370742 : struct ldb_dn *dn_ref = NULL;
152 20056669 : PyLdbDnObject *py_ret;
153 20056669 : PyTypeObject *PyLdb_Dn_Type;
154 :
155 23370742 : if (dn == NULL) {
156 0 : Py_RETURN_NONE;
157 : }
158 :
159 23370742 : mem_ctx = talloc_new(NULL);
160 23370742 : if (mem_ctx == NULL) {
161 0 : return PyErr_NoMemory();
162 : }
163 :
164 23370742 : dn_ref = talloc_reference(mem_ctx, dn);
165 23370742 : if (dn_ref == NULL) {
166 0 : talloc_free(mem_ctx);
167 0 : return PyErr_NoMemory();
168 : }
169 :
170 23370742 : PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
171 23370742 : if (PyLdb_Dn_Type == NULL) {
172 0 : talloc_free(mem_ctx);
173 0 : return NULL;
174 : }
175 :
176 23370742 : py_ret = (PyLdbDnObject *)PyLdb_Dn_Type->tp_alloc(PyLdb_Dn_Type, 0);
177 20056669 : Py_DECREF(PyLdb_Dn_Type);
178 23370742 : if (py_ret == NULL) {
179 0 : talloc_free(mem_ctx);
180 0 : PyErr_NoMemory();
181 0 : return NULL;
182 : }
183 23370742 : py_ret->mem_ctx = mem_ctx;
184 23370742 : py_ret->dn = dn;
185 23370742 : py_ret->pyldb = pyldb;
186 :
187 23370742 : Py_INCREF(py_ret->pyldb);
188 23370742 : return (PyObject *)py_ret;
189 : }
190 :
191 165292 : void PyErr_SetLdbError(PyObject *error, int ret, struct ldb_context *ldb_ctx)
192 : {
193 165292 : PyObject *exc = NULL;
194 165292 : const char *ldb_error_string = NULL;
195 :
196 165292 : if (ret == LDB_ERR_PYTHON_EXCEPTION) {
197 0 : return; /* Python exception should already be set, just keep that */
198 : }
199 :
200 165292 : if (ldb_ctx != NULL) {
201 165292 : ldb_error_string = ldb_errstring(ldb_ctx);
202 : }
203 : /* either no LDB context, no string stored or string reset */
204 165292 : if (ldb_error_string == NULL) {
205 1 : ldb_error_string = ldb_strerror(ret);
206 : }
207 :
208 165292 : exc = Py_BuildValue("(i,s)", ret, ldb_error_string);
209 165292 : if (exc == NULL) {
210 : /*
211 : * Py_BuildValue failed, and will have set its own exception.
212 : * It isn't the one we wanted, but it will have to do.
213 : * This is all very unexpected.
214 : */
215 0 : fprintf(stderr, "could not make LdbError %d!\n", ret);
216 0 : return;
217 : }
218 165292 : PyErr_SetObject(error, exc);
219 135068 : Py_DECREF(exc);
220 : }
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