source4/auth/gensec/pygensec.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2009
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include <Python.h>
  20 #include "includes.h"
  21 #include "param/pyparam.h"
  22 #include "auth/gensec/gensec.h"
  23 #include "libcli/util/pyerrors.h"
  24 #include "scripting/python/modules.h"
  25 #include "lib/talloc/pytalloc.h"
  26 #include <tevent.h>
  27
  28 static PyObject *py_get_name_by_authtype(PyObject *self, PyObject *args)
  29 {
  30         int type;
  31         const char *name;
  32         struct gensec_security *security;
  33
  34         if (!PyArg_ParseTuple(args, "i", &type))
  35                 return NULL;
  36
  37         security = (struct gensec_security *)py_talloc_get_ptr(self);
  38
  39         name = gensec_get_name_by_authtype(security, type);
  40         if (name == NULL)
  41                 Py_RETURN_NONE;
  42
  43         return PyString_FromString(name);
  44 }
  45
  46 static struct gensec_settings *settings_from_object(TALLOC_CTX *mem_ctx, PyObject *object)
  47 {
  48         struct gensec_settings *s;
  49         PyObject *py_hostname, *py_lp_ctx;
  50
  51         if (!PyDict_Check(object)) {
  52                 PyErr_SetString(PyExc_ValueError, "settings should be a dictionary");
  53                 return NULL;
  54         }
  55
  56         s = talloc_zero(mem_ctx, struct gensec_settings);
  57         if (!s) return NULL;
  58
  59         py_hostname = PyDict_GetItemString(object, "target_hostname");
  60         if (!py_hostname) {
  61                 PyErr_SetString(PyExc_ValueError, "settings.target_hostname not found");
  62                 return NULL;
  63         }
  64
  65         py_lp_ctx = PyDict_GetItemString(object, "lp_ctx");
  66         if (!py_lp_ctx) {
  67                 PyErr_SetString(PyExc_ValueError, "settings.lp_ctx not found");
  68                 return NULL;
  69         }
  70
  71         s->target_hostname = PyString_AsString(py_hostname);
  72         s->lp_ctx = lpcfg_from_py_object(s, py_lp_ctx);
  73         return s;
  74 }
  75
  76 static PyObject *py_gensec_start_client(PyTypeObject *type, PyObject *args, PyObject *kwargs)
  77 {
  78         NTSTATUS status;
  79         py_talloc_Object *self;
  80         struct gensec_settings *settings;
  81         const char *kwnames[] = { "settings", NULL };
  82         PyObject *py_settings;
  83         struct tevent_context *ev;
  84
  85         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O", discard_const_p(char *, kwnames), &py_settings))
  86                 return NULL;
  87
  88         self = (py_talloc_Object*)type->tp_alloc(type, 0);
  89         if (self == NULL) {
  90                 PyErr_NoMemory();
  91                 return NULL;
  92         }
  93         self->talloc_ctx = talloc_new(NULL);
  94         if (self->talloc_ctx == NULL) {
  95                 PyErr_NoMemory();
  96                 return NULL;
  97         }
  98
  99         settings = settings_from_object(self->talloc_ctx, py_settings);
 100         if (settings == NULL) {
 101                 PyObject_DEL(self);
 102                 return NULL;
 103         }
 104
 105         ev = tevent_context_init(self->talloc_ctx);
 106         if (ev == NULL) {
 107                 PyErr_NoMemory();
 108                 PyObject_Del(self);
 109                 return NULL;
 110         }
 111
 112         status = gensec_init(settings->lp_ctx);
 113         if (!NT_STATUS_IS_OK(status)) {
 114                 PyErr_SetNTSTATUS(status);
 115                 PyObject_DEL(self);
 116                 return NULL;
 117         }
 118
 119         status = gensec_client_start(self->talloc_ctx,
 120                 (struct gensec_security **)&self->ptr, ev, settings);
 121         if (!NT_STATUS_IS_OK(status)) {
 122                 PyErr_SetNTSTATUS(status);
 123                 PyObject_DEL(self);
 124                 return NULL;
 125         }
 126         return (PyObject *)self;
 127 }
 128
 129 static PyObject *py_gensec_session_info(PyObject *self)
 130 {
 131         NTSTATUS status;
 132         struct gensec_security *security = (struct gensec_security *)py_talloc_get_ptr(self);
 133         struct auth_session_info *info;
 134         if (security->ops == NULL) {
 135                 PyErr_SetString(PyExc_ValueError, "gensec not fully initialised - ask Andrew");
 136                 return NULL;
 137         }
 138         status = gensec_session_info(security, &info);
 139         if (NT_STATUS_IS_ERR(status)) {
 140                 PyErr_SetNTSTATUS(status);
 141                 return NULL;
 142         }
 143
 144         /* FIXME */
 145         Py_RETURN_NONE;
 146 }
 147
 148 static PyMethodDef py_gensec_security_methods[] = {
 149         { "start_client", (PyCFunction)py_gensec_start_client, METH_VARARGS|METH_KEYWORDS|METH_CLASS,
 150                 "S.start_client(settings) -> gensec" },
 151 /*      { "start_server", (PyCFunction)py_gensec_start_server, METH_VARARGS|METH_KEYWORDS|METH_CLASS,
 152                 "S.start_server(auth_ctx, settings) -> gensec" },*/
 153         { "session_info", (PyCFunction)py_gensec_session_info, METH_NOARGS,
 154                 "S.session_info() -> info" },
 155         { "get_name_by_authtype", (PyCFunction)py_get_name_by_authtype, METH_VARARGS,
 156                 "S.get_name_by_authtype(authtype) -> name\nLookup an auth type." },
 157         { NULL }
 158 };
 159
 160 static PyTypeObject Py_Security = {
 161         .tp_name = "Security",
 162         .tp_flags = Py_TPFLAGS_DEFAULT,
 163         .tp_methods = py_gensec_security_methods,
 164         .tp_basicsize = sizeof(py_talloc_Object),
 165         .tp_dealloc = py_talloc_dealloc,
 166 };
 167
 168 void initgensec(void)
 169 {
 170         PyObject *m;
 171
 172         if (PyType_Ready(&Py_Security) < 0)
 173                 return;
 174
 175         m = Py_InitModule3("gensec", NULL, "Generic Security Interface.");
 176         if (m == NULL)
 177                 return;
 178
 179         PyModule_AddObject(m, "FEATURE_SESSION_KEY",     PyInt_FromLong(GENSEC_FEATURE_SESSION_KEY));
 180         PyModule_AddObject(m, "FEATURE_SIGN",            PyInt_FromLong(GENSEC_FEATURE_SIGN));
 181         PyModule_AddObject(m, "FEATURE_SEAL",            PyInt_FromLong(GENSEC_FEATURE_SEAL));
 182         PyModule_AddObject(m, "FEATURE_DCE_STYLE",       PyInt_FromLong(GENSEC_FEATURE_DCE_STYLE));
 183         PyModule_AddObject(m, "FEATURE_ASYNC_REPLIES",   PyInt_FromLong(GENSEC_FEATURE_ASYNC_REPLIES));
 184         PyModule_AddObject(m, "FEATURE_DATAGRAM_MODE",   PyInt_FromLong(GENSEC_FEATURE_DATAGRAM_MODE));
 185         PyModule_AddObject(m, "FEATURE_SIGN_PKT_HEADER", PyInt_FromLong(GENSEC_FEATURE_SIGN_PKT_HEADER));
 186         PyModule_AddObject(m, "FEATURE_NEW_SPNEGO",      PyInt_FromLong(GENSEC_FEATURE_NEW_SPNEGO));
 187
 188         Py_INCREF(&Py_Security);
 189         PyModule_AddObject(m, "Security", (PyObject *)&Py_Security);
 190 }