getncchanges: fix highest_usn off by one calculation in get_nc_changes_add_links()
[sfrench/samba-autobuild/.git] / source4 / auth / pyauth.c
index 865609e8e3630535f5757ab6ed98636ba05e6cd1..61db907b90260917f05a26e91ad350d92134f2ed 100644 (file)
@@ -1,7 +1,8 @@
 /* 
    Unix SMB/CIFS implementation.
    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
-   
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2011
+
    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
 
 #include <Python.h>
 #include "includes.h"
+#include "libcli/util/pyerrors.h"
 #include "param/param.h"
 #include "pyauth.h"
+#include "pyldb.h"
 #include "auth/system_session_proto.h"
+#include "auth/auth.h"
 #include "param/pyparam.h"
 #include "libcli/security/security.h"
+#include "auth/credentials/pycredentials.h"
+#include <tevent.h>
+#include "librpc/rpc/pyrpc_util.h"
+#include "lib/events/events.h"
 
+void initauth(void);
 
-PyTypeObject PyAuthSession = {
-       .tp_name = "AuthSession",
-       .tp_basicsize = sizeof(py_talloc_Object),
-       .tp_dealloc = py_talloc_dealloc,
-       .tp_flags = Py_TPFLAGS_DEFAULT,
-       .tp_repr = py_talloc_default_repr,
-};
+staticforward PyTypeObject PyAuthContext;
 
-PyObject *PyAuthSession_FromSession(struct auth_session_info *session)
+static PyObject *PyAuthSession_FromSession(struct auth_session_info *session)
 {
-       return py_talloc_reference(&PyAuthSession, session);
+       return py_return_ndr_struct("samba.dcerpc.auth", "session_info", session, session);
 }
 
 static PyObject *py_system_session(PyObject *module, PyObject *args)
@@ -43,60 +46,260 @@ static PyObject *py_system_session(PyObject *module, PyObject *args)
        PyObject *py_lp_ctx = Py_None;
        struct loadparm_context *lp_ctx = NULL;
        struct auth_session_info *session;
+       TALLOC_CTX *mem_ctx;
        if (!PyArg_ParseTuple(args, "|O", &py_lp_ctx))
                return NULL;
 
-       lp_ctx = lp_from_py_object(py_lp_ctx);
-       if (lp_ctx == NULL)
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       lp_ctx = lpcfg_from_py_object(mem_ctx, py_lp_ctx);
+       if (lp_ctx == NULL) {
+               talloc_free(mem_ctx);
                return NULL;
+       }
 
        session = system_session(lp_ctx);
 
+       talloc_free(mem_ctx);
+
        return PyAuthSession_FromSession(session);
 }
 
 
-static PyObject *py_system_session_anon(PyObject *module, PyObject *args)
+static PyObject *py_admin_session(PyObject *module, PyObject *args)
 {
-       PyObject *py_lp_ctx = Py_None;
-       struct loadparm_context *lp_ctx;
+       PyObject *py_lp_ctx;
+       PyObject *py_sid;
+       struct loadparm_context *lp_ctx = NULL;
        struct auth_session_info *session;
-       if (!PyArg_ParseTuple(args, "|O", &py_lp_ctx))
+       struct dom_sid *domain_sid = NULL;
+       TALLOC_CTX *mem_ctx;
+
+       if (!PyArg_ParseTuple(args, "OO", &py_lp_ctx, &py_sid))
+               return NULL;
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
                return NULL;
+       }
 
-       lp_ctx = lp_from_py_object(py_lp_ctx);
-       if (lp_ctx == NULL)
+       lp_ctx = lpcfg_from_py_object(mem_ctx, py_lp_ctx);
+       if (lp_ctx == NULL) {
+               talloc_free(mem_ctx);
                return NULL;
+       }
 
-       session = system_session_anon(NULL, lp_ctx);
+       domain_sid = dom_sid_parse_talloc(mem_ctx, PyString_AsString(py_sid));
+       if (domain_sid == NULL) {
+               PyErr_Format(PyExc_RuntimeError, "Unable to parse sid %s", 
+                                        PyString_AsString(py_sid));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+       session = admin_session(NULL, lp_ctx, domain_sid);
+       talloc_free(mem_ctx);
 
        return PyAuthSession_FromSession(session);
 }
 
-static PyObject *py_admin_session(PyObject *module, PyObject *args)
+static PyObject *py_user_session(PyObject *module, PyObject *args, PyObject *kwargs)
 {
-       PyObject *py_lp_ctx;
-       PyObject *py_sid;
-       struct loadparm_context *lp_ctx = NULL;
+       NTSTATUS nt_status;
        struct auth_session_info *session;
-       struct dom_sid *domain_sid = NULL;
-       if (!PyArg_ParseTuple(args, "OO", &py_lp_ctx, &py_sid))
+       TALLOC_CTX *mem_ctx;
+       const char * const kwnames[] = { "ldb", "lp_ctx", "principal", "dn", "session_info_flags", NULL };
+       struct ldb_context *ldb_ctx;
+       PyObject *py_ldb = Py_None;
+       PyObject *py_dn = Py_None;
+       PyObject *py_lp_ctx = Py_None;
+       struct loadparm_context *lp_ctx = NULL;
+       struct ldb_dn *user_dn;
+       char *principal = NULL;
+       int session_info_flags = 0; /* This is an int, because that's
+                                * what we need for the python
+                                * PyArg_ParseTupleAndKeywords */
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|OzOi",
+                                        discard_const_p(char *, kwnames),
+                                        &py_ldb, &py_lp_ctx, &principal, &py_dn, &session_info_flags)) {
                return NULL;
+       }
 
-       lp_ctx = lp_from_py_object(py_lp_ctx);
-       if (lp_ctx == NULL)
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
                return NULL;
+       }
 
-       domain_sid = dom_sid_parse_talloc(NULL, PyString_AsString(py_sid));
-       session = admin_session(NULL, lp_ctx, domain_sid);
+       ldb_ctx = pyldb_Ldb_AsLdbContext(py_ldb);
+
+       if (py_dn == Py_None) {
+               user_dn = NULL;
+       } else {
+               if (!pyldb_Object_AsDn(ldb_ctx, py_dn, ldb_ctx, &user_dn)) {
+                       talloc_free(mem_ctx);
+                       return NULL;
+               }
+       }
+
+       lp_ctx = lpcfg_from_py_object(mem_ctx, py_lp_ctx);
+       if (lp_ctx == NULL) {
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       nt_status = authsam_get_session_info_principal(mem_ctx, lp_ctx, ldb_ctx, principal, user_dn,
+                                                      session_info_flags, &session);
+       if (!NT_STATUS_IS_OK(nt_status)) {
+               talloc_free(mem_ctx);
+               PyErr_NTSTATUS_IS_ERR_RAISE(nt_status);
+       }
+
+       talloc_steal(NULL, session);
+       talloc_free(mem_ctx);
 
        return PyAuthSession_FromSession(session);
 }
 
+
+static const char **PyList_AsStringList(TALLOC_CTX *mem_ctx, PyObject *list, 
+                                       const char *paramname)
+{
+       const char **ret;
+       Py_ssize_t i;
+       if (!PyList_Check(list)) {
+               PyErr_Format(PyExc_TypeError, "%s is not a list", paramname);
+               return NULL;
+       }
+       ret = talloc_array(NULL, const char *, PyList_Size(list)+1);
+       if (ret == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       for (i = 0; i < PyList_Size(list); i++) {
+               PyObject *item = PyList_GetItem(list, i);
+               if (!PyString_Check(item)) {
+                       PyErr_Format(PyExc_TypeError, "%s should be strings", paramname);
+                       return NULL;
+               }
+               ret[i] = talloc_strndup(ret, PyString_AsString(item),
+                                       PyString_Size(item));
+       }
+       ret[i] = NULL;
+       return ret;
+}
+
+static PyObject *PyAuthContext_FromContext(struct auth4_context *auth_context)
+{
+       return pytalloc_reference(&PyAuthContext, auth_context);
+}
+
+static PyObject *py_auth_context_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
+{
+       PyObject *py_lp_ctx = Py_None;
+       PyObject *py_ldb = Py_None;
+       PyObject *py_imessaging_ctx = Py_None;
+       PyObject *py_auth_context = Py_None;
+       PyObject *py_methods = Py_None;
+       TALLOC_CTX *mem_ctx;
+       struct auth4_context *auth_context;
+       struct imessaging_context *imessaging_context = NULL;
+       struct loadparm_context *lp_ctx;
+       struct tevent_context *ev;
+       struct ldb_context *ldb = NULL;
+       NTSTATUS nt_status;
+       const char **methods;
+
+       const char * const kwnames[] = { "lp_ctx", "messaging_ctx", "ldb", "methods", NULL };
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OOOO",
+                                        discard_const_p(char *, kwnames),
+                                        &py_lp_ctx, &py_imessaging_ctx, &py_ldb, &py_methods))
+               return NULL;
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       if (py_ldb != Py_None) {
+               ldb = pyldb_Ldb_AsLdbContext(py_ldb);
+       }
+
+       lp_ctx = lpcfg_from_py_object(mem_ctx, py_lp_ctx);
+       if (lp_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       ev = s4_event_context_init(mem_ctx);
+       if (ev == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       if (py_imessaging_ctx != Py_None) {
+               imessaging_context = pytalloc_get_type(py_imessaging_ctx, struct imessaging_context);
+       }
+
+       if (py_methods == Py_None && py_ldb == Py_None) {
+               nt_status = auth_context_create(mem_ctx, ev, imessaging_context, lp_ctx, &auth_context);
+       } else {
+               if (py_methods != Py_None) {
+                       methods = PyList_AsStringList(mem_ctx, py_methods, "methods");
+                       if (methods == NULL) {
+                               talloc_free(mem_ctx);
+                               return NULL;
+                       }
+               } else {
+                       methods = auth_methods_from_lp(mem_ctx, lp_ctx);
+               }
+               nt_status = auth_context_create_methods(mem_ctx, methods, ev, 
+                                                       imessaging_context, lp_ctx,
+                                                       ldb, &auth_context);
+       }
+
+       if (!NT_STATUS_IS_OK(nt_status)) {
+               talloc_free(mem_ctx);
+               PyErr_NTSTATUS_IS_ERR_RAISE(nt_status);
+       }
+
+       if (!talloc_reference(auth_context, lp_ctx)) {
+               talloc_free(mem_ctx);
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       if (!talloc_reference(auth_context, ev)) {
+               talloc_free(mem_ctx);
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       py_auth_context = PyAuthContext_FromContext(auth_context);
+
+       talloc_free(mem_ctx);
+
+       return py_auth_context;
+}
+
+static PyTypeObject PyAuthContext = {
+       .tp_name = "AuthContext",
+       .tp_flags = Py_TPFLAGS_DEFAULT,
+       .tp_new = py_auth_context_new,
+};
+
 static PyMethodDef py_auth_methods[] = {
        { "system_session", (PyCFunction)py_system_session, METH_VARARGS, NULL },
-       { "system_session_anonymous", (PyCFunction)py_system_session_anon, METH_VARARGS, NULL },
        { "admin_session", (PyCFunction)py_admin_session, METH_VARARGS, NULL },
+       { "user_session", (PyCFunction)py_user_session, METH_VARARGS|METH_KEYWORDS, NULL },
        { NULL },
 };
 
@@ -104,13 +307,20 @@ void initauth(void)
 {
        PyObject *m;
 
-       if (PyType_Ready(&PyAuthSession) < 0)
+       if (pytalloc_BaseObject_PyType_Ready(&PyAuthContext) < 0)
                return;
 
-       m = Py_InitModule3("auth", py_auth_methods, "Authentication and authorization support.");
+       m = Py_InitModule3("auth", py_auth_methods,
+                                          "Authentication and authorization support.");
        if (m == NULL)
                return;
 
-       Py_INCREF(&PyAuthSession);
-       PyModule_AddObject(m, "AuthSession", (PyObject *)&PyAuthSession);
+       Py_INCREF(&PyAuthContext);
+       PyModule_AddObject(m, "AuthContext", (PyObject *)&PyAuthContext);
+
+#define ADD_FLAG(val)  PyModule_AddObject(m, #val, PyInt_FromLong(val))
+       ADD_FLAG(AUTH_SESSION_INFO_DEFAULT_GROUPS);
+       ADD_FLAG(AUTH_SESSION_INFO_AUTHENTICATED);
+       ADD_FLAG(AUTH_SESSION_INFO_SIMPLE_PRIVILEGES);
+
 }