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
  27 void init_glue(void);
  28 static PyObject *PyExc_NTSTATUSError;
  29 static PyObject *PyExc_WERRORError;
  30 static PyObject *PyExc_HRESULTError;
  31 static PyObject *PyExc_DsExtendedError;
  32
  33 static PyObject *py_generate_random_str(PyObject *self, PyObject *args)
  34 {
  35         int len;
  36         PyObject *ret;
  37         char *retstr;
  38         if (!PyArg_ParseTuple(args, "i", &len))
  39                 return NULL;
  40
  41         retstr = generate_random_str(NULL, len);
  42         ret = PyStr_FromString(retstr);
  43         talloc_free(retstr);
  44         return ret;
  45 }
  46
  47 static PyObject *py_generate_random_password(PyObject *self, PyObject *args)
  48 {
  49         int min, max;
  50         PyObject *ret;
  51         char *retstr;
  52         if (!PyArg_ParseTuple(args, "ii", &min, &max))
  53                 return NULL;
  54
  55         retstr = generate_random_password(NULL, min, max);
  56         if (retstr == NULL) {
  57                 return NULL;
  58         }
  59         ret = PyStr_FromString(retstr);
  60         talloc_free(retstr);
  61         return ret;
  62 }
  63
  64 static PyObject *py_generate_random_machine_password(PyObject *self, PyObject *args)
  65 {
  66         int min, max;
  67         PyObject *ret;
  68         char *retstr;
  69         if (!PyArg_ParseTuple(args, "ii", &min, &max))
  70                 return NULL;
  71
  72         retstr = generate_random_machine_password(NULL, min, max);
  73         if (retstr == NULL) {
  74                 return NULL;
  75         }
  76         ret = PyUnicode_FromString(retstr);
  77         talloc_free(retstr);
  78         return ret;
  79 }
  80
  81 static PyObject *py_check_password_quality(PyObject *self, PyObject *args)
  82 {
  83         char *pass;
  84
  85         if (!PyArg_ParseTuple(args, "s", &pass)) {
  86                 return NULL;
  87         }
  88
  89         return PyBool_FromLong(check_password_quality(pass));
  90 }
  91
  92 static PyObject *py_generate_random_bytes(PyObject *self, PyObject *args)
  93 {
  94         int len;
  95         PyObject *ret;
  96         uint8_t *bytes = NULL;
  97
  98         if (!PyArg_ParseTuple(args, "i", &len))
  99                 return NULL;
 100
 101         bytes = talloc_zero_size(NULL, len);
 102         generate_random_buffer(bytes, len);
 103         ret = PyBytes_FromStringAndSize((const char *)bytes, len);
 104         talloc_free(bytes);
 105         return ret;
 106 }
 107
 108 static PyObject *py_unix2nttime(PyObject *self, PyObject *args)
 109 {
 110         time_t t;
 111         unsigned int _t;
 112         NTTIME nt;
 113
 114         if (!PyArg_ParseTuple(args, "I", &_t)) {
 115                 return NULL;
 116         }
 117         t = _t;
 118
 119         unix_to_nt_time(&nt, t);
 120
 121         return PyLong_FromLongLong((uint64_t)nt);
 122 }
 123
 124 static PyObject *py_nttime2unix(PyObject *self, PyObject *args)
 125 {
 126         time_t t;
 127         NTTIME nt;
 128         if (!PyArg_ParseTuple(args, "K", &nt))
 129                 return NULL;
 130
 131         t = nt_time_to_unix(nt);
 132
 133         return PyInt_FromLong((uint64_t)t);
 134 }
 135
 136 static PyObject *py_nttime2string(PyObject *self, PyObject *args)
 137 {
 138         PyObject *ret;
 139         NTTIME nt;
 140         TALLOC_CTX *tmp_ctx;
 141         const char *string;
 142         if (!PyArg_ParseTuple(args, "K", &nt))
 143                 return NULL;
 144
 145         tmp_ctx = talloc_new(NULL);
 146         if (tmp_ctx == NULL) {
 147                 PyErr_NoMemory();
 148                 return NULL;
 149         }
 150
 151         string = nt_time_string(tmp_ctx, nt);
 152         ret =  PyStr_FromString(string);
 153
 154         talloc_free(tmp_ctx);
 155
 156         return ret;
 157 }
 158
 159 static PyObject *py_set_debug_level(PyObject *self, PyObject *args)
 160 {
 161         unsigned level;
 162         if (!PyArg_ParseTuple(args, "I", &level))
 163                 return NULL;
 164         (DEBUGLEVEL) = level;
 165         Py_RETURN_NONE;
 166 }
 167
 168 static PyObject *py_get_debug_level(PyObject *self)
 169 {
 170         return PyInt_FromLong(DEBUGLEVEL);
 171 }
 172
 173 static PyObject *py_is_ntvfs_fileserver_built(PyObject *self)
 174 {
 175 #ifdef WITH_NTVFS_FILESERVER
 176         Py_RETURN_TRUE;
 177 #else
 178         Py_RETURN_FALSE;
 179 #endif
 180 }
 181
 182 static PyObject *py_is_heimdal_built(PyObject *self)
 183 {
 184 #ifdef SAMBA4_USES_HEIMDAL
 185         Py_RETURN_TRUE;
 186 #else
 187         Py_RETURN_FALSE;
 188 #endif
 189 }
 190
 191 /*
 192   return the list of interface IPs we have configured
 193   takes an loadparm context, returns a list of IPs in string form
 194
 195   Does not return addresses on 127.0.0.0/8
 196  */
 197 static PyObject *py_interface_ips(PyObject *self, PyObject *args)
 198 {
 199         PyObject *pylist;
 200         int count;
 201         TALLOC_CTX *tmp_ctx;
 202         PyObject *py_lp_ctx;
 203         struct loadparm_context *lp_ctx;
 204         struct interface *ifaces;
 205         int i, ifcount;
 206         int all_interfaces = 1;
 207
 208         if (!PyArg_ParseTuple(args, "O|i", &py_lp_ctx, &all_interfaces))
 209                 return NULL;
 210
 211         tmp_ctx = talloc_new(NULL);
 212         if (tmp_ctx == NULL) {
 213                 PyErr_NoMemory();
 214                 return NULL;
 215         }
 216
 217         lp_ctx = lpcfg_from_py_object(tmp_ctx, py_lp_ctx);
 218         if (lp_ctx == NULL) {
 219                 talloc_free(tmp_ctx);
 220                 return NULL;
 221         }
 222
 223         load_interface_list(tmp_ctx, lp_ctx, &ifaces);
 224
 225         count = iface_list_count(ifaces);
 226
 227         /* first count how many are not loopback addresses */
 228         for (ifcount = i = 0; i<count; i++) {
 229                 const char *ip = iface_list_n_ip(ifaces, i);
 230
 231                 if (all_interfaces) {
 232                         ifcount++;
 233                         continue;
 234                 }
 235
 236                 if (iface_list_same_net(ip, "127.0.0.1", "255.0.0.0")) {
 237                         continue;
 238                 }
 239
 240                 if (iface_list_same_net(ip, "169.254.0.0", "255.255.0.0")) {
 241                         continue;
 242                 }
 243
 244                 if (iface_list_same_net(ip, "::1", "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")) {
 245                         continue;
 246                 }
 247
 248                 if (iface_list_same_net(ip, "fe80::", "ffff:ffff:ffff:ffff::")) {
 249                         continue;
 250                 }
 251
 252                 ifcount++;
 253         }
 254
 255         pylist = PyList_New(ifcount);
 256         for (ifcount = i = 0; i<count; i++) {
 257                 const char *ip = iface_list_n_ip(ifaces, i);
 258
 259                 if (all_interfaces) {
 260                         PyList_SetItem(pylist, ifcount, PyStr_FromString(ip));
 261                         ifcount++;
 262                         continue;
 263                 }
 264
 265                 if (iface_list_same_net(ip, "127.0.0.1", "255.0.0.0")) {
 266                         continue;
 267                 }
 268
 269                 if (iface_list_same_net(ip, "169.254.0.0", "255.255.0.0")) {
 270                         continue;
 271                 }
 272
 273                 if (iface_list_same_net(ip, "::1", "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")) {
 274                         continue;
 275                 }
 276
 277                 if (iface_list_same_net(ip, "fe80::", "ffff:ffff:ffff:ffff::")) {
 278                         continue;
 279                 }
 280
 281                 PyList_SetItem(pylist, ifcount, PyStr_FromString(ip));
 282                 ifcount++;
 283         }
 284         talloc_free(tmp_ctx);
 285         return pylist;
 286 }
 287
 288 static PyObject *py_strcasecmp_m(PyObject *self, PyObject *args)
 289 {
 290         char *s1, *s2;
 291
 292         if (!PyArg_ParseTuple(args, "ss", &s1, &s2))
 293                 return NULL;
 294
 295         return PyInt_FromLong(strcasecmp_m(s1, s2));
 296 }
 297
 298 static PyObject *py_strstr_m(PyObject *self, PyObject *args)
 299 {
 300         char *s1, *s2, *ret;
 301
 302         if (!PyArg_ParseTuple(args, "ss", &s1, &s2))
 303                 return NULL;
 304
 305         ret = strstr_m(s1, s2);
 306         if (!ret) {
 307                 Py_RETURN_NONE;
 308         }
 309         return PyStr_FromString(ret);
 310 }
 311
 312 static PyMethodDef py_misc_methods[] = {
 313         { "generate_random_str", (PyCFunction)py_generate_random_str, METH_VARARGS,
 314                 "generate_random_str(len) -> string\n"
 315                 "Generate random string with specified length." },
 316         { "generate_random_password", (PyCFunction)py_generate_random_password,
 317                 METH_VARARGS, "generate_random_password(min, max) -> string\n"
 318                 "Generate random password (based on printable ascii characters) "
 319                 "with a length >= min and <= max." },
 320         { "generate_random_machine_password", (PyCFunction)py_generate_random_machine_password,
 321                 METH_VARARGS, "generate_random_machine_password(min, max) -> string\n"
 322                 "Generate random password "
 323                 "(based on random utf16 characters converted to utf8 or "
 324                 "random ascii characters if 'unix charset' is not 'utf8')"
 325                 "with a length >= min (at least 14) and <= max (at most 255)." },
 326         { "check_password_quality", (PyCFunction)py_check_password_quality,
 327                 METH_VARARGS, "check_password_quality(pass) -> bool\n"
 328                 "Check password quality against Samba's check_password_quality,"
 329                 "the implementation of Microsoft's rules:"
 330                 "http://msdn.microsoft.com/en-us/subscriptions/cc786468%28v=ws.10%29.aspx"
 331         },
 332         { "unix2nttime", (PyCFunction)py_unix2nttime, METH_VARARGS,
 333                 "unix2nttime(timestamp) -> nttime" },
 334         { "nttime2unix", (PyCFunction)py_nttime2unix, METH_VARARGS,
 335                 "nttime2unix(nttime) -> timestamp" },
 336         { "nttime2string", (PyCFunction)py_nttime2string, METH_VARARGS,
 337                 "nttime2string(nttime) -> string" },
 338         { "set_debug_level", (PyCFunction)py_set_debug_level, METH_VARARGS,
 339                 "set debug level" },
 340         { "get_debug_level", (PyCFunction)py_get_debug_level, METH_NOARGS,
 341                 "get debug level" },
 342         { "interface_ips", (PyCFunction)py_interface_ips, METH_VARARGS,
 343                 "interface_ips(lp_ctx[, all_interfaces) -> list_of_ifaces\n"
 344                 "\n"
 345                 "get interface IP address list"},
 346         { "strcasecmp_m", (PyCFunction)py_strcasecmp_m, METH_VARARGS,
 347                 "(for testing) compare two strings using Samba's strcasecmp_m()"},
 348         { "strstr_m", (PyCFunction)py_strstr_m, METH_VARARGS,
 349                 "(for testing) find one string in another with Samba's strstr_m()"},
 350         { "is_ntvfs_fileserver_built", (PyCFunction)py_is_ntvfs_fileserver_built, METH_NOARGS,
 351                 "is the NTVFS file server built in this installation?" },
 352         { "is_heimdal_built", (PyCFunction)py_is_heimdal_built, METH_NOARGS,
 353                 "is Samba built with Heimdal Kerberbos?" },
 354         { "generate_random_bytes",
 355                 (PyCFunction)py_generate_random_bytes,
 356                 METH_VARARGS,
 357                 "generate_random_bytes(len) -> bytes\n"
 358                 "Generate random bytes with specified length." },
 359         { NULL }
 360 };
 361
 362 static struct PyModuleDef moduledef = {
 363     PyModuleDef_HEAD_INIT,
 364     .m_name = "_glue",
 365     .m_doc = "Python bindings for miscellaneous Samba functions.",
 366     .m_size = -1,
 367     .m_methods = py_misc_methods,
 368 };
 369
 370 MODULE_INIT_FUNC(_glue)
 371 {
 372         PyObject *m;
 373
 374         debug_setup_talloc_log();
 375
 376         m = PyModule_Create(&moduledef);
 377         if (m == NULL)
 378                 return NULL;
 379
 380         PyModule_AddObject(m, "version",
 381                                            PyStr_FromString(SAMBA_VERSION_STRING));
 382         PyExc_NTSTATUSError = PyErr_NewException(discard_const_p(char, "samba.NTSTATUSError"), PyExc_RuntimeError, NULL);
 383         if (PyExc_NTSTATUSError != NULL) {
 384                 Py_INCREF(PyExc_NTSTATUSError);
 385                 PyModule_AddObject(m, "NTSTATUSError", PyExc_NTSTATUSError);
 386         }
 387
 388         PyExc_WERRORError = PyErr_NewException(discard_const_p(char, "samba.WERRORError"), PyExc_RuntimeError, NULL);
 389         if (PyExc_WERRORError != NULL) {
 390                 Py_INCREF(PyExc_WERRORError);
 391                 PyModule_AddObject(m, "WERRORError", PyExc_WERRORError);
 392         }
 393
 394         PyExc_HRESULTError = PyErr_NewException(discard_const_p(char, "samba.HRESULTError"), PyExc_RuntimeError, NULL);
 395         if (PyExc_HRESULTError != NULL) {
 396                 Py_INCREF(PyExc_HRESULTError);
 397                 PyModule_AddObject(m, "HRESULTError", PyExc_HRESULTError);
 398         }
 399
 400         PyExc_DsExtendedError = PyErr_NewException(discard_const_p(char, "samba.DsExtendedError"), PyExc_RuntimeError, NULL);
 401         if (PyExc_DsExtendedError != NULL) {
 402                 Py_INCREF(PyExc_DsExtendedError);
 403                 PyModule_AddObject(m, "DsExtendedError", PyExc_DsExtendedError);
 404         }
 405
 406         return m;
 407 }
 408