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/*
Authors:
Sumit Bose <sbose@redhat.com>
Alexander Bokovoy <abokovoy@redhat.com>
Copyright (C) 2013 Red Hat
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <Python.h>
#include "util/sss_python.h"
#include "sss_client/idmap/sss_nss_idmap.h"
#define SSS_NAME_KEY "name"
#define SSS_SID_KEY "sid"
#define SSS_ID_KEY "id"
#define SSS_TYPE_KEY "type"
enum lookup_type {
SIDBYNAME,
SIDBYID,
NAMEBYSID,
IDBYSID
};
static int add_dict(PyObject *py_result, PyObject *key, PyObject *res_type,
PyObject *res, PyObject *id_type)
{
int ret;
PyObject *py_dict;
py_dict = PyDict_New();
if (py_dict == NULL) {
return ENOMEM;
}
ret = PyDict_SetItem(py_dict, res_type, res);
if (ret != 0) {
Py_XDECREF(py_dict);
return ret;
}
ret = PyDict_SetItem(py_dict, PyString_FromString(SSS_TYPE_KEY), id_type);
if (ret != 0) {
Py_XDECREF(py_dict);
return ret;
}
ret = PyDict_SetItem(py_result, key, py_dict);
return ret;
}
static char *py_string_or_unicode_as_string(PyObject *inp)
{
PyObject *py_str = NULL;
if (PyUnicode_Check(inp)) {
py_str = PyUnicode_AsUTF8String(inp);
} else if (PyString_Check(inp)) {
py_str = inp;
} else {
PyErr_Format(PyExc_TypeError, "input must be unicode or a string");
return NULL;
}
return PyString_AS_STRING(py_str);
}
static int do_getsidbyname(PyObject *py_result, PyObject *py_name)
{
int ret;
const char *name;
char *sid = NULL;
enum sss_id_type id_type;
name = py_string_or_unicode_as_string(py_name);
if (name == NULL) {
return EINVAL;
}
ret = sss_nss_getsidbyname(name, &sid, &id_type);
if (ret == 0) {
ret = add_dict(py_result, py_name, PyString_FromString(SSS_SID_KEY),
PyUnicode_FromString(sid), PyInt_FromLong(id_type));
}
free(sid);
return ret;
}
static int do_getnamebysid(PyObject *py_result, PyObject *py_sid)
{
int ret;
const char *sid;
char *name = NULL;
enum sss_id_type id_type;
sid = py_string_or_unicode_as_string(py_sid);
if (sid == NULL) {
return EINVAL;
}
ret = sss_nss_getnamebysid(sid, &name, &id_type);
if (ret == 0) {
ret = add_dict(py_result, py_sid, PyString_FromString(SSS_NAME_KEY),
PyUnicode_FromString(name), PyInt_FromLong(id_type));
}
free(name);
return ret;
}
static int do_getsidbyid(PyObject *py_result, PyObject *py_id)
{
long id;
const char *id_str;
char *endptr;
char *sid = NULL;
int ret;
enum sss_id_type id_type;
if (PyInt_Check(py_id)) {
id = PyInt_AS_LONG(py_id);
} else if (PyLong_Check(py_id)) {
id = PyLong_AsLong(py_id);
} else {
id_str = py_string_or_unicode_as_string(py_id);
if (id_str == NULL) {
return EINVAL;
}
errno = 0;
id = strtol(id_str, &endptr, 10);
if (errno != 0 || *endptr != '\0') {
return EINVAL;
}
}
if (id < 0 || id > UINT32_MAX) {
return EINVAL;
}
ret = sss_nss_getsidbyid((uint32_t) id, &sid, &id_type);
if (ret == 0) {
ret = add_dict(py_result, py_id, PyString_FromString(SSS_SID_KEY),
PyUnicode_FromString(sid), PyInt_FromLong(id_type));
}
free(sid);
return ret;
}
static int do_getidbysid(PyObject *py_result, PyObject *py_sid)
{
const char *sid;
uint32_t id;
enum sss_id_type id_type;
int ret;
sid = py_string_or_unicode_as_string(py_sid);
if (sid == NULL) {
return EINVAL;
}
ret = sss_nss_getidbysid(sid, &id, &id_type);
if (ret == 0) {
ret = add_dict(py_result, py_sid, PyString_FromString(SSS_ID_KEY),
PyInt_FromLong(id), PyInt_FromLong(id_type));
}
return ret;
}
static int do_lookup(enum lookup_type type, PyObject *py_result,
PyObject *py_inp)
{
switch(type) {
case SIDBYNAME:
return do_getsidbyname(py_result, py_inp);
break;
case NAMEBYSID:
return do_getnamebysid(py_result, py_inp);
break;
case SIDBYID:
return do_getsidbyid(py_result, py_inp);
break;
case IDBYSID:
return do_getidbysid(py_result, py_inp);
break;
default:
return ENOSYS;
}
return ENOSYS;
}
static PyObject *check_args(enum lookup_type type, PyObject *args)
{
PyObject *obj, *py_value;
int ret;
Py_ssize_t len, i;
PyObject *py_result;
if (!PyArg_ParseTuple(args, sss_py_const_p(char, "O"), &obj)) {
PyErr_Format(PyExc_ValueError, "Unable to retrieve argument\n");
return NULL;
}
if (!(PyList_Check(obj) || PyTuple_Check(obj) ||
PyString_Check(obj) || PyUnicode_Check(obj) ||
(type == SIDBYID && (PyInt_Check(obj) || PyLong_Check(obj))))) {
PyErr_Format(PyExc_ValueError,
"Only string, long or list or tuples of them " \
"are accepted\n");
return NULL;
}
py_result = PyDict_New();
Py_XINCREF(py_result);
if (py_result == NULL) {
PyErr_Format(PyExc_MemoryError,
"Unable to allocate resulting dictionary\n");
return NULL;
}
if (PyList_Check(obj) || PyTuple_Check(obj)) {
len = PySequence_Size(obj);
for(i=0; i < len; i++) {
py_value = PySequence_GetItem(obj, i);
if ((py_value != NULL) &&
(PyString_Check(py_value) || PyUnicode_Check(py_value) ||
(type == SIDBYID &&
(PyInt_Check(py_value) || PyLong_Check(py_value))))) {
ret = do_lookup(type, py_result, py_value);
if (ret != 0) {
/* Skip this name */
continue;
}
}
}
} else {
ret = do_lookup(type, py_result, obj);
switch (ret) {
case 0:
case ENOENT: /* nothing found, return empty dict */
break;
case EINVAL:
PyErr_Format(PyExc_ValueError, "Unable to retrieve argument\n");
Py_XDECREF(py_result);
return NULL;
break;
default:
PyErr_Format(PyExc_IOError, "Operation not supported\n");
Py_XDECREF(py_result);
return NULL;
}
}
Py_XDECREF(py_result);
return py_result;
}
PyDoc_STRVAR(getsidbyname_doc,
"getsidbyname(name or list/tuple of names) -> dict(name => dict(results))\n\
\n\
Returns a dictionary with a dictonary of results for each given name.\n\
The result dictonary contain the SID and the type of the object which can be\n\
accessed with the key constants SID_KEY and TYPE_KEY, respectively.\n\
\n\
The return type can be one of the following constants:\n\
- ID_NOT_SPECIFIED\n\
- ID_USER\n\
- ID_GROUP\n\
- ID_BOTH"
);
static PyObject * py_getsidbyname(PyObject *module, PyObject *args)
{
return check_args(SIDBYNAME, args);
}
PyDoc_STRVAR(getsidbyid_doc,
"getsidbyid(id or list/tuple of id) -> dict(id => dict(results))\n\
\n\
Returns a dictionary with a dictonary of results for each given POSIX ID.\n\
The result dictonary contain the SID and the type of the object which can be\n\
accessed with the key constants SID_KEY and TYPE_KEY, respectively."
);
static PyObject * py_getsidbyid(PyObject *module, PyObject *args)
{
return check_args(SIDBYID, args);
}
PyDoc_STRVAR(getnamebysid_doc,
"getnamebysid(sid or list/tuple of sid) -> dict(sid => dict(results))\n\
\n\
Returns a dictionary with a dictonary of results for each given SID.\n\
The result dictonary contain the name and the type of the object which can be\n\
accessed with the key constants NAME_KEY and TYPE_KEY, respectively.\n\
\n\
NOTE: getnamebysid currently works only with id_provider set as \"ad\" or \"ipa\""
);
static PyObject * py_getnamebysid(PyObject *module, PyObject *args)
{
return check_args(NAMEBYSID, args);
}
PyDoc_STRVAR(getidbysid_doc,
"getidbysid(sid) -> POSIX ID\n\
\n\
Returns the POSIX ID of the object with the given SID."
"getidbysid(sid or list/tuple of sid) -> dict(sid => dict(results))\n\
\n\
Returns a dictionary with a dictonary of results for each given SID.\n\
The result dictonary contain the POSIX ID and the type of the object which\n\
can be accessed with the key constants ID_KEY and TYPE_KEY, respectively."
);
static PyObject * py_getidbysid(PyObject *module, PyObject *args)
{
return check_args(IDBYSID, args);
}
static PyMethodDef methods[] = {
{ sss_py_const_p(char, "getsidbyname"), (PyCFunction) py_getsidbyname,
METH_VARARGS, getsidbyname_doc },
{ sss_py_const_p(char, "getsidbyid"), (PyCFunction) py_getsidbyid,
METH_VARARGS, getsidbyid_doc },
{ sss_py_const_p(char, "getnamebysid"), (PyCFunction) py_getnamebysid,
METH_VARARGS, getnamebysid_doc },
{ sss_py_const_p(char, "getidbysid"), (PyCFunction) py_getidbysid,
METH_VARARGS, getidbysid_doc },
{ NULL,NULL, 0, NULL }
};
PyMODINIT_FUNC
initpysss_nss_idmap(void)
{
PyObject *module;
module = Py_InitModule3(sss_py_const_p(char, "pysss_nss_idmap"),
methods,
sss_py_const_p(char, "SSSD ID-mapping functions"));
PyModule_AddIntConstant(module, "ID_NOT_SPECIFIED",
SSS_ID_TYPE_NOT_SPECIFIED);
PyModule_AddIntConstant(module, "ID_USER", SSS_ID_TYPE_UID);
PyModule_AddIntConstant(module, "ID_GROUP", SSS_ID_TYPE_GID);
PyModule_AddIntConstant(module, "ID_BOTH", SSS_ID_TYPE_BOTH);
PyModule_AddStringConstant(module, "SID_KEY", SSS_SID_KEY);
PyModule_AddStringConstant(module, "NAME_KEY", SSS_NAME_KEY);
PyModule_AddStringConstant(module, "ID_KEY", SSS_ID_KEY);
PyModule_AddStringConstant(module, "TYPE_KEY", SSS_TYPE_KEY);
}
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