ctdb-recovery: Refactor banning a node into separate computation
[amitay/samba.git] / python / pyglue.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
4    Copyright (C) Matthias Dieter Wallnöfer          2009
5    
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10    
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15    
16    You should have received a copy of the GNU General Public License
17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include <Python.h>
21 #include "python/py3compat.h"
22 #include "includes.h"
23 #include "version.h"
24 #include "param/pyparam.h"
25 #include "lib/socket/netif.h"
26 #include "lib/util/debug.h"
27
28 void init_glue(void);
29 static PyObject *PyExc_NTSTATUSError;
30 static PyObject *PyExc_WERRORError;
31 static PyObject *PyExc_HRESULTError;
32 static PyObject *PyExc_DsExtendedError;
33
34 static PyObject *py_generate_random_str(PyObject *self, PyObject *args)
35 {
36         int len;
37         PyObject *ret;
38         char *retstr;
39         if (!PyArg_ParseTuple(args, "i", &len))
40                 return NULL;
41
42         retstr = generate_random_str(NULL, len);
43         ret = PyUnicode_FromString(retstr);
44         talloc_free(retstr);
45         return ret;
46 }
47
48 static PyObject *py_generate_random_password(PyObject *self, PyObject *args)
49 {
50         int min, max;
51         PyObject *ret;
52         char *retstr;
53         if (!PyArg_ParseTuple(args, "ii", &min, &max))
54                 return NULL;
55
56         retstr = generate_random_password(NULL, min, max);
57         if (retstr == NULL) {
58                 return NULL;
59         }
60         ret = PyUnicode_FromString(retstr);
61         talloc_free(retstr);
62         return ret;
63 }
64
65 static PyObject *py_generate_random_machine_password(PyObject *self, PyObject *args)
66 {
67         int min, max;
68         PyObject *ret;
69         char *retstr;
70         if (!PyArg_ParseTuple(args, "ii", &min, &max))
71                 return NULL;
72
73         retstr = generate_random_machine_password(NULL, min, max);
74         if (retstr == NULL) {
75                 return NULL;
76         }
77         ret = PyUnicode_FromString(retstr);
78         talloc_free(retstr);
79         return ret;
80 }
81
82 static PyObject *py_check_password_quality(PyObject *self, PyObject *args)
83 {
84         char *pass;
85
86         if (!PyArg_ParseTuple(args, "s", &pass)) {
87                 return NULL;
88         }
89
90         return PyBool_FromLong(check_password_quality(pass));
91 }
92
93 static PyObject *py_generate_random_bytes(PyObject *self, PyObject *args)
94 {
95         int len;
96         PyObject *ret;
97         uint8_t *bytes = NULL;
98
99         if (!PyArg_ParseTuple(args, "i", &len))
100                 return NULL;
101
102         bytes = talloc_zero_size(NULL, len);
103         generate_random_buffer(bytes, len);
104         ret = PyBytes_FromStringAndSize((const char *)bytes, len);
105         talloc_free(bytes);
106         return ret;
107 }
108
109 static PyObject *py_unix2nttime(PyObject *self, PyObject *args)
110 {
111         time_t t;
112         unsigned int _t;
113         NTTIME nt;
114
115         if (!PyArg_ParseTuple(args, "I", &_t)) {
116                 return NULL;
117         }
118         t = _t;
119
120         unix_to_nt_time(&nt, t);
121
122         return PyLong_FromLongLong((uint64_t)nt);
123 }
124
125 static PyObject *py_nttime2unix(PyObject *self, PyObject *args)
126 {
127         time_t t;
128         NTTIME nt;
129         if (!PyArg_ParseTuple(args, "K", &nt))
130                 return NULL;
131
132         t = nt_time_to_unix(nt);
133
134         return PyInt_FromLong((uint64_t)t);
135 }
136
137 static PyObject *py_nttime2string(PyObject *self, PyObject *args)
138 {
139         PyObject *ret;
140         NTTIME nt;
141         TALLOC_CTX *tmp_ctx;
142         const char *string;
143         if (!PyArg_ParseTuple(args, "K", &nt))
144                 return NULL;
145
146         tmp_ctx = talloc_new(NULL);
147         if (tmp_ctx == NULL) {
148                 PyErr_NoMemory();
149                 return NULL;
150         }
151
152         string = nt_time_string(tmp_ctx, nt);
153         ret =  PyUnicode_FromString(string);
154
155         talloc_free(tmp_ctx);
156
157         return ret;
158 }
159
160 static PyObject *py_set_debug_level(PyObject *self, PyObject *args)
161 {
162         unsigned level;
163         if (!PyArg_ParseTuple(args, "I", &level))
164                 return NULL;
165         debuglevel_set(level);
166         Py_RETURN_NONE;
167 }
168
169 static PyObject *py_get_debug_level(PyObject *self,
170                 PyObject *Py_UNUSED(ignored))
171 {
172         return PyInt_FromLong(debuglevel_get());
173 }
174
175 static PyObject *py_fault_setup(PyObject *self,
176                 PyObject *Py_UNUSED(ignored))
177 {
178         static bool done;
179         if (!done) {
180                 fault_setup();
181                 done = true;
182         }
183         Py_RETURN_NONE;
184 }
185
186 static PyObject *py_is_ntvfs_fileserver_built(PyObject *self,
187                 PyObject *Py_UNUSED(ignored))
188 {
189 #ifdef WITH_NTVFS_FILESERVER
190         Py_RETURN_TRUE;
191 #else
192         Py_RETURN_FALSE;
193 #endif
194 }
195
196 static PyObject *py_is_heimdal_built(PyObject *self,
197                 PyObject *Py_UNUSED(ignored))
198 {
199 #ifdef SAMBA4_USES_HEIMDAL
200         Py_RETURN_TRUE;
201 #else
202         Py_RETURN_FALSE;
203 #endif
204 }
205
206 /*
207   return the list of interface IPs we have configured
208   takes an loadparm context, returns a list of IPs in string form
209
210   Does not return addresses on 127.0.0.0/8
211  */
212 static PyObject *py_interface_ips(PyObject *self, PyObject *args)
213 {
214         PyObject *pylist;
215         int count;
216         TALLOC_CTX *tmp_ctx;
217         PyObject *py_lp_ctx;
218         struct loadparm_context *lp_ctx;
219         struct interface *ifaces;
220         int i, ifcount;
221         int all_interfaces = 1;
222
223         if (!PyArg_ParseTuple(args, "O|i", &py_lp_ctx, &all_interfaces))
224                 return NULL;
225
226         tmp_ctx = talloc_new(NULL);
227         if (tmp_ctx == NULL) {
228                 PyErr_NoMemory();
229                 return NULL;
230         }
231
232         lp_ctx = lpcfg_from_py_object(tmp_ctx, py_lp_ctx);
233         if (lp_ctx == NULL) {
234                 talloc_free(tmp_ctx);
235                 return NULL;
236         }
237
238         load_interface_list(tmp_ctx, lp_ctx, &ifaces);
239
240         count = iface_list_count(ifaces);
241
242         /* first count how many are not loopback addresses */
243         for (ifcount = i = 0; i<count; i++) {
244                 const char *ip = iface_list_n_ip(ifaces, i);
245
246                 if (all_interfaces) {
247                         ifcount++;
248                         continue;
249                 }
250
251                 if (iface_list_same_net(ip, "127.0.0.1", "255.0.0.0")) {
252                         continue;
253                 }
254
255                 if (iface_list_same_net(ip, "169.254.0.0", "255.255.0.0")) {
256                         continue;
257                 }
258
259                 if (iface_list_same_net(ip, "::1", "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")) {
260                         continue;
261                 }
262
263                 if (iface_list_same_net(ip, "fe80::", "ffff:ffff:ffff:ffff::")) {
264                         continue;
265                 }
266
267                 ifcount++;
268         }
269
270         pylist = PyList_New(ifcount);
271         for (ifcount = i = 0; i<count; i++) {
272                 const char *ip = iface_list_n_ip(ifaces, i);
273
274                 if (all_interfaces) {
275                         PyList_SetItem(pylist, ifcount, PyUnicode_FromString(ip));
276                         ifcount++;
277                         continue;
278                 }
279
280                 if (iface_list_same_net(ip, "127.0.0.1", "255.0.0.0")) {
281                         continue;
282                 }
283
284                 if (iface_list_same_net(ip, "169.254.0.0", "255.255.0.0")) {
285                         continue;
286                 }
287
288                 if (iface_list_same_net(ip, "::1", "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")) {
289                         continue;
290                 }
291
292                 if (iface_list_same_net(ip, "fe80::", "ffff:ffff:ffff:ffff::")) {
293                         continue;
294                 }
295
296                 PyList_SetItem(pylist, ifcount, PyUnicode_FromString(ip));
297                 ifcount++;
298         }
299         talloc_free(tmp_ctx);
300         return pylist;
301 }
302
303 static PyObject *py_strcasecmp_m(PyObject *self, PyObject *args)
304 {
305         const char *s1 = NULL;
306         const char *s2 = NULL;
307         long cmp_result = 0;
308         if (!PyArg_ParseTuple(args, PYARG_STR_UNI
309                               PYARG_STR_UNI,
310                               "utf8", &s1, "utf8", &s2)) {
311                 return NULL;
312         }
313
314         cmp_result = strcasecmp_m(s1, s2);
315         PyMem_Free(discard_const_p(char, s1));
316         PyMem_Free(discard_const_p(char, s2));
317         return PyInt_FromLong(cmp_result);
318 }
319
320 static PyObject *py_strstr_m(PyObject *self, PyObject *args)
321 {
322         const char *s1 = NULL;
323         const char *s2 = NULL;
324         char *strstr_ret = NULL;
325         PyObject *result = NULL;
326         if (!PyArg_ParseTuple(args, PYARG_STR_UNI
327                               PYARG_STR_UNI,
328                               "utf8", &s1, "utf8", &s2))
329                 return NULL;
330
331         strstr_ret = strstr_m(s1, s2);
332         if (!strstr_ret) {
333                 PyMem_Free(discard_const_p(char, s1));
334                 PyMem_Free(discard_const_p(char, s2));
335                 Py_RETURN_NONE;
336         }
337         result = PyUnicode_FromString(strstr_ret);
338         PyMem_Free(discard_const_p(char, s1));
339         PyMem_Free(discard_const_p(char, s2));
340         return result;
341 }
342
343 static PyMethodDef py_misc_methods[] = {
344         { "generate_random_str", (PyCFunction)py_generate_random_str, METH_VARARGS,
345                 "generate_random_str(len) -> string\n"
346                 "Generate random string with specified length." },
347         { "generate_random_password", (PyCFunction)py_generate_random_password,
348                 METH_VARARGS, "generate_random_password(min, max) -> string\n"
349                 "Generate random password (based on printable ascii characters) "
350                 "with a length >= min and <= max." },
351         { "generate_random_machine_password", (PyCFunction)py_generate_random_machine_password,
352                 METH_VARARGS, "generate_random_machine_password(min, max) -> string\n"
353                 "Generate random password "
354                 "(based on random utf16 characters converted to utf8 or "
355                 "random ascii characters if 'unix charset' is not 'utf8')"
356                 "with a length >= min (at least 14) and <= max (at most 255)." },
357         { "check_password_quality", (PyCFunction)py_check_password_quality,
358                 METH_VARARGS, "check_password_quality(pass) -> bool\n"
359                 "Check password quality against Samba's check_password_quality,"
360                 "the implementation of Microsoft's rules:"
361                 "http://msdn.microsoft.com/en-us/subscriptions/cc786468%28v=ws.10%29.aspx"
362         },
363         { "unix2nttime", (PyCFunction)py_unix2nttime, METH_VARARGS,
364                 "unix2nttime(timestamp) -> nttime" },
365         { "nttime2unix", (PyCFunction)py_nttime2unix, METH_VARARGS,
366                 "nttime2unix(nttime) -> timestamp" },
367         { "nttime2string", (PyCFunction)py_nttime2string, METH_VARARGS,
368                 "nttime2string(nttime) -> string" },
369         { "set_debug_level", (PyCFunction)py_set_debug_level, METH_VARARGS,
370                 "set debug level" },
371         { "get_debug_level", (PyCFunction)py_get_debug_level, METH_NOARGS,
372                 "get debug level" },
373         { "fault_setup", (PyCFunction)py_fault_setup, METH_NOARGS,
374                 "setup the default samba panic handler" },
375         { "interface_ips", (PyCFunction)py_interface_ips, METH_VARARGS,
376                 "interface_ips(lp_ctx[, all_interfaces) -> list_of_ifaces\n"
377                 "\n"
378                 "get interface IP address list"},
379         { "strcasecmp_m", (PyCFunction)py_strcasecmp_m, METH_VARARGS,
380                 "(for testing) compare two strings using Samba's strcasecmp_m()"},
381         { "strstr_m", (PyCFunction)py_strstr_m, METH_VARARGS,
382                 "(for testing) find one string in another with Samba's strstr_m()"},
383         { "is_ntvfs_fileserver_built", (PyCFunction)py_is_ntvfs_fileserver_built, METH_NOARGS,
384                 "is the NTVFS file server built in this installation?" },
385         { "is_heimdal_built", (PyCFunction)py_is_heimdal_built, METH_NOARGS,
386                 "is Samba built with Heimdal Kerberbos?" },
387         { "generate_random_bytes",
388                 (PyCFunction)py_generate_random_bytes,
389                 METH_VARARGS,
390                 "generate_random_bytes(len) -> bytes\n"
391                 "Generate random bytes with specified length." },
392         { NULL }
393 };
394
395 static struct PyModuleDef moduledef = {
396     PyModuleDef_HEAD_INIT,
397     .m_name = "_glue",
398     .m_doc = "Python bindings for miscellaneous Samba functions.",
399     .m_size = -1,
400     .m_methods = py_misc_methods,
401 };
402
403 MODULE_INIT_FUNC(_glue)
404 {
405         PyObject *m;
406
407         debug_setup_talloc_log();
408
409         m = PyModule_Create(&moduledef);
410         if (m == NULL)
411                 return NULL;
412
413         PyModule_AddObject(m, "version",
414                                            PyUnicode_FromString(SAMBA_VERSION_STRING));
415         PyExc_NTSTATUSError = PyErr_NewException(discard_const_p(char, "samba.NTSTATUSError"), PyExc_RuntimeError, NULL);
416         if (PyExc_NTSTATUSError != NULL) {
417                 Py_INCREF(PyExc_NTSTATUSError);
418                 PyModule_AddObject(m, "NTSTATUSError", PyExc_NTSTATUSError);
419         }
420
421         PyExc_WERRORError = PyErr_NewException(discard_const_p(char, "samba.WERRORError"), PyExc_RuntimeError, NULL);
422         if (PyExc_WERRORError != NULL) {
423                 Py_INCREF(PyExc_WERRORError);
424                 PyModule_AddObject(m, "WERRORError", PyExc_WERRORError);
425         }
426
427         PyExc_HRESULTError = PyErr_NewException(discard_const_p(char, "samba.HRESULTError"), PyExc_RuntimeError, NULL);
428         if (PyExc_HRESULTError != NULL) {
429                 Py_INCREF(PyExc_HRESULTError);
430                 PyModule_AddObject(m, "HRESULTError", PyExc_HRESULTError);
431         }
432
433         PyExc_DsExtendedError = PyErr_NewException(discard_const_p(char, "samba.DsExtendedError"), PyExc_RuntimeError, NULL);
434         if (PyExc_DsExtendedError != NULL) {
435                 Py_INCREF(PyExc_DsExtendedError);
436                 PyModule_AddObject(m, "DsExtendedError", PyExc_DsExtendedError);
437         }
438
439         return m;
440 }
441