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/*
* A Python binding for cracklib.
*
* Parts of this code are based on work Copyright (c) 2003 by Domenico
* Andreoli.
*
* Copyright (c) 2008, 2009, 2012 Jan Dittberner <jan@dittberner.info>
*
* This file is part of cracklib.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* This library 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef PYTHON_H
#include PYTHON_H
#else
#include <Python.h>
#endif
#if PY_MAJOR_VERSION >= 3
#define IS_PY3K
#endif
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <crack.h>
#include <locale.h>
#ifdef HAVE_LIBINTL_H
#include <libintl.h>
#endif
#ifdef HAVE_PTHREAD_H
static pthread_mutex_t cracklib_mutex = PTHREAD_MUTEX_INITIALIZER;
#define LOCK() pthread_mutex_lock(&cracklib_mutex)
#define UNLOCK() pthread_mutex_unlock(&cracklib_mutex)
#else
#define LOCK()
#define UNLOCK()
#endif
#define DICT_SUFFIX ".pwd"
static char _cracklib_FascistCheck_doc [] =
"arguments: passwd, dictpath (optional)\n"
"\n"
" passwd - password to be checked for weakness\n"
" dictpath - full path name to the cracklib dictionary database\n"
"\n"
"if dictpath is not specified the default dictionary database\n"
"will be used.\n"
"\n"
"return value: the same password passed as first argument.\n"
"\n"
"if password is weak, exception ValueError is raised with argument\n"
"set to the reason of weakness.\n"
;
static PyObject *
_cracklib_FascistCheck(PyObject *self, PyObject *args, PyObject *kwargs)
{
char *candidate, *dict;
char *defaultdict = NULL;
const char *result;
struct stat st;
char *keywords[] = {"pw", "dictpath", NULL};
char *dictfile;
self = NULL;
candidate = NULL;
dict = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|s", keywords,
&candidate, &dict))
{
PyErr_SetString(PyExc_ValueError, "error parsing arguments");
return NULL;
}
if (candidate == NULL)
{
PyErr_SetString(PyExc_ValueError, "first argument was not a string!");
return NULL;
}
if (dict != NULL)
{
if (dict[0] != '/')
{
PyErr_SetString(PyExc_ValueError,
"second argument was not an absolute path!");
return NULL;
}
dictfile = malloc(strlen(dict) + sizeof(DICT_SUFFIX));
if (dictfile == NULL)
{
PyErr_SetFromErrnoWithFilename(PyExc_OSError, dict);
return NULL;
}
sprintf(dictfile, "%s" DICT_SUFFIX, dict);
if (lstat(dictfile, &st) == -1)
{
PyErr_SetFromErrnoWithFilename(PyExc_OSError, dictfile);
free(dictfile);
return NULL;
}
free(dictfile);
} else
{
defaultdict = strdup(GetDefaultCracklibDict());
if (errno == ENOMEM) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
dictfile = malloc(strlen(defaultdict) + sizeof(DICT_SUFFIX));
if (dictfile == NULL)
{
PyErr_SetFromErrnoWithFilename(PyExc_OSError, defaultdict);
free(defaultdict);
return NULL;
}
sprintf(dictfile, "%s" DICT_SUFFIX, defaultdict);
if (lstat(dictfile, &st) == -1)
{
PyErr_SetFromErrnoWithFilename(PyExc_OSError, dictfile);
free(defaultdict);
free(dictfile);
return NULL;
}
free(dictfile);
}
setlocale(LC_ALL, "");
#ifdef ENABLE_NLS
textdomain("cracklib");
#endif
LOCK();
result = FascistCheck(candidate, dict ? dict : defaultdict);
UNLOCK();
if (defaultdict != NULL)
{
free(defaultdict);
}
if (result != NULL)
{
PyErr_SetString(PyExc_ValueError, result);
return NULL;
}
return Py_BuildValue("s", candidate);
}
static PyMethodDef
_cracklibmethods[] =
{
{"FascistCheck", (PyCFunction) _cracklib_FascistCheck,
METH_VARARGS | METH_KEYWORDS, _cracklib_FascistCheck_doc},
{NULL, NULL},
};
static char _cracklib_doc[] =
"Python bindings for cracklib.\n"
"\n"
"This module enables the use of cracklib features from within a Python\n"
"program or interpreter.\n"
;
#ifdef IS_PY3K
static struct PyModuleDef moduledef = {
PyModuleDef_HEAD_INIT,
"_cracklib",
_cracklib_doc,
0,
_cracklibmethods,
NULL,
NULL,
NULL,
NULL
};
#define INITERROR return NULL
PyObject *
PyInit__cracklib(void)
#else
#define INITERROR return
void
init_cracklib(void)
#endif
{
#ifdef IS_PY3K
PyObject *module = PyModule_Create(&moduledef);
#else
PyObject *module = Py_InitModule3("_cracklib", _cracklibmethods, _cracklib_doc);
#endif
if (module == NULL)
INITERROR;
#ifdef IS_PY3K
return module;
#endif
}
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