chiark - git - mdw - catacomb-python/blob - passphrase.c

   1 /* -*-c-*-
   2  *
   3  * $Id$
   4  *
   5  * Reading and writing passphrases
   6  *
   7  * (c) 2005 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the Python interface to Catacomb.
  13  *
  14  * Catacomb/Python is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * Catacomb/Python is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Header files ------------------------------------------------------*/
  30
  31 #include "catacomb-python.h"
  32
  33 /*----- Pixie stuff -------------------------------------------------------*/
  34
  35 typedef struct pixie_pyobj {
  36   PyObject_HEAD
  37   int fd;
  38 } pixie_pyobj;
  39
  40 static PyTypeObject *pixie_pytype;
  41 #define PIXIE_PYCHECK(o) PyObject_TypeCheck((o), pixie_pytype)
  42 #define PIXIE_FD(o) (((pixie_pyobj *)(o))->fd)
  43
  44 #ifdef WANT_CONVPIXIE
  45 static int convpixie(PyObject *o, void *p)
  46 {
  47   if (!PIXIE_PYCHECK(o))
  48     TYERR("want pixie");
  49   *(int *)p = PIXIE_FD(o);
  50   return (1);
  51 end:
  52   return (0);
  53 }
  54 #endif
  55
  56 static PyObject *pixie_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
  57 {
  58   pixie_pyobj *rc = 0;
  59   char *kwlist[] = { "socket", 0 };
  60   char *sock = 0;
  61   int fd;
  62
  63   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s:new", kwlist, &sock))
  64     goto end;
  65   if ((fd = pixie_open(sock)) < 0)
  66     OSERR(sock);
  67   rc = (pixie_pyobj *)ty->tp_alloc(ty, 0);
  68   rc->fd = fd;
  69 end:
  70   return ((PyObject *)rc);
  71 }
  72
  73 static void pixie_pydealloc(PyObject *me)
  74 {
  75   close(PIXIE_FD(me));
  76   FREEOBJ(me);
  77 }
  78
  79 static PyObject *pixmeth_read(PyObject *me, PyObject *arg, PyObject *kw)
  80 {
  81   unsigned mode = PMODE_READ;
  82   char *tag;
  83   char *kwlist[] = { "tag", "mode", 0 };
  84   PyObject *rc = 0;
  85   int r;
  86   char buf[1024];
  87
  88   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s|O&:read", kwlist,
  89                                    &tag, convuint, &mode))
  90     goto end;
  91   r = pixie_read(PIXIE_FD(me), tag, mode, buf, sizeof(buf));
  92   if (r < 0)
  93     OSERR(0);
  94   else if (r > 0)
  95     RETURN_NONE;
  96   else
  97     rc = PyString_FromString(buf);
  98 end:
  99   return (rc);
 100 }
 101
 102 static PyObject *pixmeth_set(PyObject *me, PyObject *arg)
 103 {
 104   char *tag;
 105   char *phrase;
 106
 107   if (!PyArg_ParseTuple(arg, "ss:set", &tag, &phrase))
 108     return (0);
 109   pixie_set(PIXIE_FD(me), tag, phrase);
 110   RETURN_ME;
 111 }
 112
 113 static PyObject *pixmeth_cancel(PyObject *me, PyObject *arg)
 114 {
 115   char *tag;
 116
 117   if (!PyArg_ParseTuple(arg, "s:cancel", &tag))
 118     return (0);
 119   pixie_cancel(PIXIE_FD(me), tag);
 120   RETURN_ME;
 121 }
 122
 123 static PyMethodDef pixie_pymethods[] = {
 124 #define METHNAME(name) pixmeth_##name
 125   KWMETH(read,          "P.read(TAG, [mode = PMODE_READ]) -> STRING")
 126   METH  (set,           "P.set(TAG, PHRASE)")
 127   METH  (cancel,        "P.cancel(TAG)")
 128 #undef METHNAME
 129   { 0 }
 130 };
 131
 132 static PyTypeObject pixie_pytype_skel = {
 133   PyObject_HEAD_INIT(0) 0,              /* Header */
 134   "catacomb.Pixie",                     /* @tp_name@ */
 135   sizeof(pixie_pyobj),                  /* @tp_basicsize@ */
 136   0,                                    /* @tp_itemsize@ */
 137
 138   pixie_pydealloc,                      /* @tp_dealloc@ */
 139   0,                                    /* @tp_print@ */
 140   0,                                    /* @tp_getattr@ */
 141   0,                                    /* @tp_setattr@ */
 142   0,                                    /* @tp_compare@ */
 143   0,                                    /* @tp_repr@ */
 144   0,                                    /* @tp_as_number@ */
 145   0,                                    /* @tp_as_sequence@ */
 146   0,                                    /* @tp_as_mapping@ */
 147   0,                                    /* @tp_hash@ */
 148   0,                                    /* @tp_call@ */
 149   0,                                    /* @tp_str@ */
 150   0,                                    /* @tp_getattro@ */
 151   0,                                    /* @tp_setattro@ */
 152   0,                                    /* @tp_as_buffer@ */
 153   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 154     Py_TPFLAGS_BASETYPE,
 155
 156   /* @tp_doc@ */
 157 "Passphrase pixie connection.",
 158
 159   0,                                    /* @tp_traverse@ */
 160   0,                                    /* @tp_clear@ */
 161   0,                                    /* @tp_richcompare@ */
 162   0,                                    /* @tp_weaklistoffset@ */
 163   0,                                    /* @tp_iter@ */
 164   0,                                    /* @tp_iternexr@ */
 165   pixie_pymethods,                      /* @tp_methods@ */
 166   0,                                    /* @tp_members@ */
 167   0,                                    /* @tp_getset@ */
 168   0,                                    /* @tp_base@ */
 169   0,                                    /* @tp_dict@ */
 170   0,                                    /* @tp_descr_get@ */
 171   0,                                    /* @tp_descr_set@ */
 172   0,                                    /* @tp_dictoffset@ */
 173   0,                                    /* @tp_init@ */
 174   PyType_GenericAlloc,                  /* @tp_alloc@ */
 175   pixie_pynew,                          /* @tp_new@ */
 176   0,                                    /* @tp_free@ */
 177   0                                     /* @tp_is_gc@ */
 178 };
 179
 180 /*----- Main code ---------------------------------------------------------*/
 181
 182 static PyObject *meth_ppread(PyObject *me, PyObject *arg, PyObject *kw)
 183 {
 184   char *tag;
 185   unsigned f = PMODE_READ;
 186   PyObject *rc = 0;
 187   char *kwlist[] = { "tag", "mode", 0 };
 188   char buf[1024];
 189
 190   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s|O&:ppread", kwlist,
 191                                    &tag, convuint, &f))
 192     goto end;
 193   if (passphrase_read(tag, f, buf, sizeof(buf)))
 194     SYSERR("passphrase read failed");
 195   rc = PyString_FromString(buf);
 196 end:
 197   return (rc);
 198 }
 199
 200 static PyObject *meth_ppcancel(PyObject *me, PyObject *arg)
 201 {
 202   char *tag;
 203
 204   if (!PyArg_ParseTuple(arg, "s:ppcancel", &tag))
 205     return (0);
 206   passphrase_cancel(tag);
 207   RETURN_NONE;
 208 }
 209
 210 static PyObject *meth_getpass(PyObject *me, PyObject *arg)
 211 {
 212   char *prompt;
 213   char buf[1024];
 214   PyObject *rc = 0;
 215
 216   if (!PyArg_ParseTuple(arg, "s:getpass", &prompt))
 217     goto end;
 218   if (pixie_getpass(prompt, buf, sizeof(buf)))
 219     OSERR(0);
 220   rc = PyString_FromString(buf);
 221 end:
 222   return (rc);
 223 }
 224
 225 static PyMethodDef methods[] = {
 226 #define METHNAME(name) meth_##name
 227   KWMETH(ppread,                "ppread(TAG, [mode = PMODE_READ]) -> STRING")
 228   METH  (ppcancel,              "ppcancel(TAG)")
 229   METH  (getpass,               "getpass(PROMPT) -> STRING")
 230 #undef METHNAME
 231   { 0 }
 232 };
 233
 234 void passphrase_pyinit(void)
 235 {
 236   INITTYPE(pixie, root);
 237   addmethods(methods);
 238 }
 239
 240 void passphrase_pyinsert(PyObject *mod)
 241 {
 242   INSERT("Pixie", pixie_pytype);
 243 }
 244
 245 /*----- That's all, folks -------------------------------------------------*/