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https://github.com/samba-team/samba.git
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libgpo: Add libgpo python bindings
Create libgpo python bindings for GROUP_POLICY_OBJECT, ADS_STRUCT, gpo_get_unix_path, ads_connect, and ads_get_gpo_list. Signed-off-by: David Mulder <dmulder@suse.com> Reviewed-by: Garming Sam <garming@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
David Mulder
Garming Sam
parent
78fd02cf31
commit
41d1ff7427
389
libgpo/pygpo.c
389
libgpo/pygpo.c
@ -22,6 +22,9 @@
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#include "param/pyparam.h"
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#include "gpo.h"
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#include "ads.h"
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#include "secrets.h"
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#include "../libds/common/flags.h"
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#include "auth/credentials/pycredentials.h"
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/* A Python C API module to use LIBGPO */
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@ -29,6 +32,251 @@
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#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
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#endif
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typedef struct {
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PyObject_HEAD
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TALLOC_CTX *frame;
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struct GROUP_POLICY_OBJECT *gpo_ptr;
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struct GROUP_POLICY_OBJECT *head;
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} GPO;
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static void py_gpo_dealloc(GPO* self)
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{
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talloc_free(self->frame);
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Py_TYPE(self)->tp_free((PyObject*)self);
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}
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static PyObject* py_gpo_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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{
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GPO *self;
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PyObject *c_obj;
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PyObject *talloc_obj;
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static const char *kwlist[] = {"gpo_ptr", "talloc_ctx", NULL};
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self = (GPO*)type->tp_alloc(type, 0);
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if (PyArg_ParseTupleAndKeywords(args, kwds, "|OO", discard_const_p(char *, kwlist),
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&c_obj, &talloc_obj)) {
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self->gpo_ptr = PyCapsule_GetPointer(c_obj, NULL);
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self->head = self->gpo_ptr;
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self->frame = PyCapsule_GetPointer(talloc_obj, NULL);
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} else
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self->gpo_ptr = NULL;
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self->frame = NULL;
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return (PyObject*)self;
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}
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static int py_gpo_init(GPO *self, PyObject *args, PyObject *kwds)
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{
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return 0;
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}
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#define GPO_getter(ATTR) \
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static PyObject* GPO_get_##ATTR(GPO *self, void *closure) \
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{ \
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if (self->gpo_ptr->ATTR) \
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return PyString_FromString(self->gpo_ptr->ATTR); \
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else \
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return Py_None; \
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}
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GPO_getter(ds_path)
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GPO_getter(file_sys_path)
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GPO_getter(display_name)
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GPO_getter(name)
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GPO_getter(link)
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GPO_getter(user_extensions)
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GPO_getter(machine_extensions)
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static PyGetSetDef GPO_setters[] = {
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{discard_const_p(char, "ds_path"), (getter)GPO_get_ds_path, NULL, NULL, NULL},
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{discard_const_p(char, "file_sys_path"), (getter)GPO_get_file_sys_path, NULL, NULL, NULL},
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{discard_const_p(char, "display_name"), (getter)GPO_get_display_name, NULL, NULL, NULL},
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{discard_const_p(char, "name"), (getter)GPO_get_name, NULL, NULL, NULL},
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{discard_const_p(char, "link"), (getter)GPO_get_link, NULL, NULL, NULL},
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{discard_const_p(char, "user_extensions"), (getter)GPO_get_user_extensions, NULL, NULL, NULL},
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{discard_const_p(char, "machine_extensions"), (getter)GPO_get_machine_extensions, NULL, NULL, NULL},
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{NULL}
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};
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static PyObject *py_gpo_get_unix_path(GPO *self, PyObject *args, PyObject *kwds)
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{
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NTSTATUS status;
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const char *cache_dir = NULL;
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PyObject *ret = Py_None;
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char *unix_path = NULL;
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static const char *kwlist[] = {"cache_dir", NULL};
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if (!PyArg_ParseTupleAndKeywords(args, kwds, "|s", discard_const_p(char *, kwlist), &cache_dir)) {
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PyErr_SetString(PyExc_SystemError, "Failed to parse arguments to gpo_get_unix_path()");
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goto out;
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}
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if (!cache_dir) {
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cache_dir = cache_path(GPO_CACHE_DIR);
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if (!cache_dir) {
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PyErr_SetString(PyExc_MemoryError, "Failed to determine gpo cache dir");
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goto out;
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}
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}
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status = gpo_get_unix_path(self->frame, cache_dir, self->gpo_ptr, &unix_path);
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if (!NT_STATUS_IS_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "Failed to determine gpo unix path");
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goto out;
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}
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ret = PyString_FromString(unix_path);
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out:
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return ret;
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}
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static PyMethodDef GPO_methods[] = {
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{"get_unix_path", (PyCFunction)py_gpo_get_unix_path, METH_KEYWORDS, NULL },
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{NULL}
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};
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static PyTypeObject GPOType;
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static PyObject* py_gpo_iternext(GPO *self)
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{
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if (self->gpo_ptr && self->gpo_ptr->next) {
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self->gpo_ptr = self->gpo_ptr->next;
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return (PyObject *)self;
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} else {
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self->gpo_ptr = self->head;
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PyErr_SetNone(PyExc_StopIteration);
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return NULL;
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}
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}
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static PyObject* py_gpo_iter(PyObject *self)
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{
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Py_INCREF(self);
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return self;
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}
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static PyTypeObject GPOType = {
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.tp_name = "gpo.GROUP_POLICY_OBJECT",
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.tp_basicsize = sizeof(GPO),
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.tp_new = py_gpo_new,
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.tp_free = PyObject_Del,
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.tp_init = (initproc)py_gpo_init,
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.tp_alloc = PyType_GenericAlloc,
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.tp_dealloc = (destructor)py_gpo_dealloc,
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.tp_doc = "GROUP_POLICY_OBJECT",
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.tp_getset = GPO_setters,
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.tp_methods = GPO_methods,
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.tp_iter = py_gpo_iter,
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.tp_iternext = (iternextfunc)py_gpo_iternext,
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.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER,
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};
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typedef struct {
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PyObject_HEAD
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TALLOC_CTX *frame;
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ADS_STRUCT *ads_ptr;
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struct cli_credentials *cli_creds;
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} ADS;
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static void py_ads_dealloc(ADS* self)
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{
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ads_destroy(&(self->ads_ptr));
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talloc_free(self->frame);
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Py_TYPE(self)->tp_free((PyObject*)self);
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}
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static PyObject* py_ads_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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{
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ADS *self;
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self = (ADS*)type->tp_alloc(type, 0);
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return (PyObject*)self;
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}
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static PyObject* py_ads_connect(ADS *self);
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static int py_ads_init(ADS *self, PyObject *args, PyObject *kwds)
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{
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const char *realm = NULL;
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const char *workgroup = NULL;
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const char *ldap_server = NULL;
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PyObject *creds = NULL;
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PyObject *lp_obj = NULL;
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struct loadparm_context *lp_ctx = NULL;
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static const char *kwlist[] = {"ldap_server", "loadparm_context", "credentials", NULL};
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if (!PyArg_ParseTupleAndKeywords(args, kwds, "sO|O", discard_const_p(char *, kwlist), &ldap_server, &lp_obj, &creds))
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return -1;
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self->frame = talloc_stackframe();
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if (creds) self->cli_creds = pytalloc_get_type(creds, struct cli_credentials);
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if (lp_obj) {
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lp_ctx = pytalloc_get_type(lp_obj, struct loadparm_context);
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if (lp_ctx == NULL) {
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return -1;
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}
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}
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if (!lp_load_initial_only(lp_ctx->szConfigFile)) return -1;
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if (self->cli_creds) {
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realm = cli_credentials_get_realm(self->cli_creds);
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workgroup = cli_credentials_get_domain(self->cli_creds);
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} else {
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realm = lp_realm();
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workgroup = lp_workgroup();
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if (!ldap_server) return -1;
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}
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if ( !(self->ads_ptr = ads_init(realm, workgroup, ldap_server)) )
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return -1;
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return 0;
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}
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static PyObject* py_ads_connect(ADS *self)
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{
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ADS_STATUS status;
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if (self->cli_creds) {
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self->ads_ptr->auth.user_name = SMB_STRDUP(cli_credentials_get_username(self->cli_creds));
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self->ads_ptr->auth.flags |= ADS_AUTH_USER_CREDS;
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self->ads_ptr->auth.password = SMB_STRDUP(cli_credentials_get_password(self->cli_creds));
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self->ads_ptr->auth.realm = SMB_STRDUP(cli_credentials_get_realm(self->cli_creds));
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status = ads_connect_user_creds(self->ads_ptr);
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if (!ADS_ERR_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "ads_connect() failed");
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Py_RETURN_FALSE;
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}
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} else {
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char *passwd;
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if (asprintf(&(self->ads_ptr->auth.user_name), "%s$", lp_netbios_name()) == -1) {
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PyErr_SetString(PyExc_SystemError, "Failed to asprintf");
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Py_RETURN_FALSE;
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} else
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self->ads_ptr->auth.flags |= ADS_AUTH_USER_CREDS;
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if (!secrets_init()) {
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PyErr_SetString(PyExc_SystemError, "secrets_init() failed");
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Py_RETURN_FALSE;
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}
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if (!(passwd = secrets_fetch_machine_password(self->ads_ptr->server.workgroup, NULL, NULL))) {
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PyErr_SetString(PyExc_SystemError, "Failed to fetch the machine account password");
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Py_RETURN_FALSE;
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}
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self->ads_ptr->auth.password = smb_xstrdup(passwd);
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self->ads_ptr->auth.realm = smb_xstrdup(self->ads_ptr->server.realm);
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if (!strupper_m(self->ads_ptr->auth.realm)) {
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PyErr_SetString(PyExc_SystemError, "Failed to strdup");
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Py_RETURN_FALSE;
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}
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status = ads_connect(self->ads_ptr);
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if (!ADS_ERR_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "ads_connect() failed");
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Py_RETURN_FALSE;
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}
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}
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Py_RETURN_TRUE;
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}
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/* Parameter mapping and functions for the GP_EXT struct */
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void initgpo(void);
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@ -52,6 +300,138 @@ static PyObject *py_gpo_get_sysvol_gpt_version(PyObject * self, PyObject * args)
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return result;
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}
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static ADS_STATUS find_samaccount(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, const char *samaccountname, uint32_t *uac_ret, const char **dn_ret)
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{
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ADS_STATUS status;
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const char *attrs[] = { "userAccountControl", NULL };
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const char *filter;
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LDAPMessage *res = NULL;
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char *dn = NULL;
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uint32_t uac = 0;
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filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)", samaccountname);
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if (filter == NULL) {
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status = ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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goto out;
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}
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status = ads_do_search_all(ads, ads->config.bind_path, LDAP_SCOPE_SUBTREE, filter, attrs, &res);
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if (!ADS_ERR_OK(status)) {
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goto out;
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}
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if (ads_count_replies(ads, res) != 1) {
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status = ADS_ERROR(LDAP_NO_RESULTS_RETURNED);
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goto out;
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}
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dn = ads_get_dn(ads, talloc_tos(), res);
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if (dn == NULL) {
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status = ADS_ERROR(LDAP_NO_MEMORY);
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goto out;
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}
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if (!ads_pull_uint32(ads, res, "userAccountControl", &uac)) {
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status = ADS_ERROR(LDAP_NO_SUCH_ATTRIBUTE);
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goto out;
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}
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if (uac_ret) {
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*uac_ret = uac;
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}
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if (dn_ret) {
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*dn_ret = talloc_strdup(mem_ctx, dn);
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if (!*dn_ret) {
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status = ADS_ERROR(LDAP_NO_MEMORY);
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goto out;
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}
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}
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out:
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TALLOC_FREE(dn);
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ads_msgfree(ads, res);
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return status;
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}
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static PyObject *py_ads_get_gpo_list(ADS *self, PyObject *args, PyObject *kwds)
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{
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TALLOC_CTX *mem_ctx = NULL;
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struct GROUP_POLICY_OBJECT *gpo_list = NULL;
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ADS_STATUS status;
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const char *samaccountname = NULL;
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const char *dn = NULL;
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uint32_t uac = 0;
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uint32_t flags = 0;
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struct security_token *token = NULL;
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PyObject *ret = Py_None;
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TALLOC_CTX *gpo_ctx;
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PyObject * t_args;
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static const char *kwlist[] = {"samaccountname", NULL};
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if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", discard_const_p(char *, kwlist), &samaccountname)) {
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PyErr_SetString(PyExc_SystemError, "Failed to parse arguments to py_ads_get_gpo_list()");
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goto out;
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}
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mem_ctx = talloc_new(self->frame);
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status = find_samaccount(self->ads_ptr, mem_ctx, samaccountname, &uac, &dn);
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if (!ADS_ERR_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "Failed to find samAccountName");
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goto out;
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}
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if (uac & UF_WORKSTATION_TRUST_ACCOUNT || uac & UF_SERVER_TRUST_ACCOUNT) {
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flags |= GPO_LIST_FLAG_MACHINE;
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status = gp_get_machine_token(self->ads_ptr, mem_ctx, dn, &token);
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} else {
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status = ads_get_sid_token(self->ads_ptr, mem_ctx, dn, &token);
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}
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if (!ADS_ERR_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "Failed to get token");
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goto out;
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}
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gpo_ctx = talloc_new(NULL);
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status = ads_get_gpo_list(self->ads_ptr, gpo_ctx, dn, flags, token, &gpo_list);
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if (!ADS_ERR_OK(status)) {
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PyErr_SetString(PyExc_SystemError, "Failed to fetch GPO list");
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goto out;
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}
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t_args = PyTuple_New(2);
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PyTuple_SetItem(t_args, 0, PyCapsule_New(gpo_list, NULL, NULL));
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PyTuple_SetItem(t_args, 1, PyCapsule_New(gpo_ctx, NULL, NULL));
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ret = PyObject_CallObject((PyObject *)&GPOType, t_args);
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out:
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talloc_free(mem_ctx);
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if (!ret) {
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PyErr_Print();
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return Py_None;
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}
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return ret;
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}
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static PyMethodDef ADS_methods[] = {
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{ "connect", (PyCFunction)py_ads_connect, METH_NOARGS, "Connect to the LDAP server" },
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{ "get_gpo_list", (PyCFunction)py_ads_get_gpo_list, METH_KEYWORDS, NULL },
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{ NULL }
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};
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static PyTypeObject ads_ADSType = {
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.tp_name = "gpo.ADS_STRUCT",
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.tp_basicsize = sizeof(ADS),
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.tp_dealloc = (destructor)py_ads_dealloc,
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.tp_flags = Py_TPFLAGS_DEFAULT,
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.tp_doc = "ADS struct",
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.tp_methods = ADS_methods,
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.tp_init = (initproc)py_ads_init,
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.tp_new = py_ads_new,
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};
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static PyMethodDef py_gpo_methods[] = {
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{"gpo_get_sysvol_gpt_version", (PyCFunction) py_gpo_get_sysvol_gpt_version, METH_VARARGS, NULL},
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{NULL}
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@ -65,7 +445,12 @@ void initgpo(void)
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debug_setup_talloc_log();
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/* Instantiate the types */
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m = Py_InitModule3("gpo", py_gpo_methods, "libgpo python bindings");
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if (m == NULL)
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return;
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if (m == NULL) return;
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PyModule_AddObject(m, "version", PyString_FromString(SAMBA_VERSION_STRING));
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if (PyType_Ready(&ads_ADSType) < 0)
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return;
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PyModule_AddObject(m, "ADS_STRUCT", (PyObject *)&ads_ADSType);
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if (PyType_Ready(&GPOType) < 0)
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return;
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PyModule_AddObject(m, "GROUP_POLICY_OBJECT", (PyObject *)&GPOType);
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}
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