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 "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 = lp_from_py_object(py_lp_ctx);
  73         s->iconv_convenience = py_iconv_convenience(s);
  74         return s;
  75 }
  76
  77 static PyObject *py_gensec_start_client(PyTypeObject *type, PyObject *args, PyObject *kwargs)
  78 {
  79         NTSTATUS status;
  80         py_talloc_Object *self;
  81         struct gensec_settings *settings;
  82         const char *kwnames[] = { "settings", NULL };
  83         PyObject *py_settings;
  84         struct tevent_context *ev;
  85
  86         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O", discard_const_p(char *, kwnames), &py_settings))
  87                 return NULL;
  88
  89         self = (py_talloc_Object*)type->tp_alloc(type, 0);
  90         if (self == NULL) {
  91                 PyErr_NoMemory();
  92                 return NULL;
  93         }
  94         self->talloc_ctx = talloc_new(NULL);
  95         if (self->talloc_ctx == NULL) {
  96                 PyErr_NoMemory();
  97                 return NULL;
  98         }
  99
 100         settings = settings_from_object(self->talloc_ctx, py_settings);
 101         if (settings == NULL) {
 102                 PyObject_DEL(self);
 103                 return NULL;
 104         }
 105
 106         ev = tevent_context_init(self->talloc_ctx);
 107         if (ev == NULL) {
 108                 PyErr_NoMemory();
 109                 PyObject_Del(self);
 110                 return NULL;
 111         }
 112
 113         status = gensec_init(settings->lp_ctx);
 114         if (!NT_STATUS_IS_OK(status)) {
 115                 PyErr_SetNTSTATUS(status);
 116                 PyObject_DEL(self);
 117                 return NULL;
 118         }
 119
 120         status = gensec_client_start(self->talloc_ctx,
 121                 (struct gensec_security **)&self->ptr, ev, settings);
 122         if (!NT_STATUS_IS_OK(status)) {
 123                 PyErr_SetNTSTATUS(status);
 124                 PyObject_DEL(self);
 125                 return NULL;
 126         }
 127         return (PyObject *)self;
 128 }
 129
 130 static PyObject *py_gensec_session_info(PyObject *self)
 131 {
 132         NTSTATUS status;
 133         struct gensec_security *security = (struct gensec_security *)py_talloc_get_ptr(self);
 134         struct auth_session_info *info;
 135         if (security->ops == NULL) {
 136                 PyErr_SetString(PyExc_ValueError, "gensec not fully initialised - ask Andrew");
 137                 return NULL;
 138         }
 139         status = gensec_session_info(security, &info);
 140         if (NT_STATUS_IS_ERR(status)) {
 141                 PyErr_SetNTSTATUS(status);
 142                 return NULL;
 143         }
 144
 145         /* FIXME */
 146         Py_RETURN_NONE;
 147 }
 148
 149 static PyMethodDef py_gensec_security_methods[] = {
 150         { "start_client", (PyCFunction)py_gensec_start_client, METH_VARARGS|METH_KEYWORDS|METH_CLASS,
 151                 "S.start_client(settings) -> gensec" },
 152 /*      { "start_server", (PyCFunction)py_gensec_start_server, METH_VARARGS|METH_KEYWORDS|METH_CLASS,
 153                 "S.start_server(auth_ctx, settings) -> gensec" },*/
 154         { "session_info", (PyCFunction)py_gensec_session_info, METH_NOARGS,
 155                 "S.session_info() -> info" },
 156         { "get_name_by_authtype", (PyCFunction)py_get_name_by_authtype, METH_VARARGS,
 157                 "S.get_name_by_authtype(authtype) -> name\nLookup an auth type." },
 158         { NULL }
 159 };
 160
 161 static PyTypeObject Py_Security = {
 162         .tp_name = "Security",
 163         .tp_flags = Py_TPFLAGS_DEFAULT,
 164         .tp_methods = py_gensec_security_methods,
 165         .tp_basicsize = sizeof(py_talloc_Object),
 166         .tp_dealloc = py_talloc_dealloc,
 167 };
 168
 169 void initgensec(void)
 170 {
 171         PyObject *m;
 172
 173         if (PyType_Ready(&Py_Security) < 0)
 174                 return;
 175
 176         m = Py_InitModule3("gensec", NULL, "Generic Security Interface.");
 177         if (m == NULL)
 178                 return;
 179
 180         PyModule_AddObject(m, "FEATURE_SESSION_KEY",     PyInt_FromLong(GENSEC_FEATURE_SESSION_KEY));
 181         PyModule_AddObject(m, "FEATURE_SIGN",            PyInt_FromLong(GENSEC_FEATURE_SIGN));
 182         PyModule_AddObject(m, "FEATURE_SEAL",            PyInt_FromLong(GENSEC_FEATURE_SEAL));
 183         PyModule_AddObject(m, "FEATURE_DCE_STYLE",       PyInt_FromLong(GENSEC_FEATURE_DCE_STYLE));
 184         PyModule_AddObject(m, "FEATURE_ASYNC_REPLIES",   PyInt_FromLong(GENSEC_FEATURE_ASYNC_REPLIES));
 185         PyModule_AddObject(m, "FEATURE_DATAGRAM_MODE",   PyInt_FromLong(GENSEC_FEATURE_DATAGRAM_MODE));
 186         PyModule_AddObject(m, "FEATURE_SIGN_PKT_HEADER", PyInt_FromLong(GENSEC_FEATURE_SIGN_PKT_HEADER));
 187         PyModule_AddObject(m, "FEATURE_NEW_SPNEGO",      PyInt_FromLong(GENSEC_FEATURE_NEW_SPNEGO));
 188
 189         Py_INCREF(&Py_Security);
 190         PyModule_AddObject(m, "Security", (PyObject *)&Py_Security);
 191 }