mdw@git.distorted.org.uk Git - pyke/blob - catacomb.c

   1 /* -*-c-*-
   2  *
   3  * Where the fun begins
   4  *
   5  * (c) 2004 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Python interface to Catacomb.
  11  *
  12  * Catacomb/Python is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Catacomb/Python is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include "catacomb-python.h"
  30
  31 /*----- Main code ---------------------------------------------------------*/
  32
  33 static const struct nameval consts[] = {
  34 #define C(x) { #x, x }
  35   C(FTY_PRIME), C(FTY_BINARY),
  36   C(PGEN_PASS), C(PGEN_FAIL), C(PGEN_BEGIN), C(PGEN_TRY), C(PGEN_DONE),
  37   C(PGEN_ABORT),
  38   C(MPW_MAX),
  39   C(RAND_IBITS),
  40   C(PMODE_READ), C(PMODE_VERIFY),
  41   C(KOPEN_READ), C(KOPEN_WRITE), C(KOPEN_NOFILE),
  42   C(KEXP_FOREVER), C(KEXP_EXPIRE),
  43   C(KF_ENCMASK), C(KENC_BINARY), C(KENC_MP), C(KENC_STRUCT),
  44     C(KENC_ENCRYPT), C(KENC_STRING), C(KENC_EC),
  45   C(KF_CATMASK), C(KCAT_SYMM), C(KCAT_PRIV), C(KCAT_PUB), C(KCAT_SHARE),
  46   C(KF_NONSECRET),
  47   C(KF_BURN), C(KF_OPT),
  48   C(EC_XONLY), C(EC_YBIT), C(EC_LSB), C(EC_CMPR), C(EC_EXPLY), C(EC_SORT),
  49   C(X25519_KEYSZ), C(X25519_PUBSZ), C(X25519_OUTSZ),
  50   C(X448_KEYSZ), C(X448_PUBSZ), C(X448_OUTSZ),
  51   C(ED25519_KEYSZ), C(ED25519_PUBSZ), C(ED25519_SIGSZ),
  52     C(ED25519_MAXPERSOSZ),
  53   C(ED448_KEYSZ), C(ED448_PUBSZ), C(ED448_SIGSZ), C(ED448_MAXPERSOSZ),
  54 #define ENTRY(tag, val, str) C(KERR_##tag),
  55   KEY_ERRORS(ENTRY)
  56 #undef ENTRY
  57 #undef C
  58   { 0 }
  59 };
  60
  61 PyObject *mexp_common(PyObject *me, PyObject *arg,
  62                       size_t efsz,
  63                       PyObject *(*id)(PyObject *),
  64                       int (*fill)(void *, PyObject *,
  65                                   PyObject *, PyObject *),
  66                       PyObject *(*exp)(PyObject *, void *, int),
  67                       void (*drop)(void *))
  68 {
  69   int i = 0, j, n, flat;
  70   PyObject *qq, *x, *y, *z = 0;
  71   char *v = 0, *vv;
  72
  73   if (PyTuple_Size(arg) == 1)
  74     arg = PyTuple_GetItem(arg, 0);
  75   Py_INCREF(arg);
  76   if (!PySequence_Check(arg)) TYERR("not a sequence");
  77   n = PySequence_Size(arg); if (!n) { z = id(me); goto end; }
  78   x = PySequence_GetItem(arg, 0);
  79   if (PySequence_Check(x))
  80     flat = 0;
  81   else {
  82     if (n % 2) VALERR("must have even number of arguments");
  83     n /= 2;
  84     flat = 1;
  85   }
  86   Py_DECREF(x);
  87
  88   v = xmalloc(n * efsz);
  89   for (i = j = 0, vv = v; i < n; i++, vv += efsz) {
  90     if (flat) {
  91       x = PySequence_GetItem(arg, j++);
  92       y = PySequence_GetItem(arg, j++);
  93     } else {
  94       qq = PySequence_GetItem(arg, j++);
  95       if (!qq) goto end;
  96       if (!PySequence_Check(qq) || PySequence_Size(qq) != 2) {
  97         Py_DECREF(qq);
  98         TYERR("want a sequence of pairs");
  99       }
 100       x = PySequence_GetItem(qq, 0);
 101       y = PySequence_GetItem(qq, 1);
 102       Py_DECREF(qq);
 103     }
 104     if (!x || !y) goto end;
 105     if (fill(vv, me, x, y)) {
 106       Py_DECREF(x);
 107       Py_DECREF(y);
 108       if (!PyErr_Occurred())
 109         PyErr_SetString(PyExc_TypeError, "type mismatch");
 110       goto end;
 111     }
 112     Py_DECREF(x);
 113     Py_DECREF(y);
 114   }
 115   z = exp(me, v, n);
 116
 117 end:
 118   if (v) {
 119     for (j = 0, vv = v; j < i; j++, vv += efsz)
 120       drop(vv);
 121     xfree(v);
 122   }
 123   Py_DECREF(arg);
 124   return (z);
 125 }
 126
 127 static PyObject *smallprimes(void)
 128 {
 129   PyObject *v = PyList_New(NPRIME);
 130   int i;
 131
 132   for (i = 0; i < NPRIME; i++)
 133     PyList_SetItem(v, i, PyInt_FromLong(primetab[i]));
 134   return (v);
 135 }
 136
 137 static PyObject *meth__ego(PyObject *me, PyObject *arg)
 138 {
 139   char *argv0;
 140   if (!PyArg_ParseTuple(arg, "s:_ego", &argv0))
 141     return (0);
 142   if (strcmp(QUIS, "<UNNAMED>") == 0)
 143     ego(argv0);
 144   RETURN_NONE;
 145 }
 146
 147 static PyMethodDef methods[] = {
 148 #define METHNAME(func) meth_##func
 149   METH  (_ego,                  "_ego(ARGV0)")
 150 #undef METHNAME
 151   { 0 }
 152 };
 153
 154 static void init_random(void)
 155 {
 156 #if PY_MAJOR_VERSION >= 3 || (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6)
 157   char *seed;
 158   uint32 r;
 159
 160   if (!Py_HashRandomizationFlag) return;
 161   seed = getenv("PYTHONHASHSEED");
 162   if (!seed || strcmp(seed, "random") == 0) r = GR_WORD(&rand_global);
 163   else r = strtoul(seed, 0, 0);
 164   if (!r) r = 0xe011f220; /* zero doesn't work well */
 165   unihash_setkey(&unihash_global, r);
 166 #endif
 167 }
 168
 169 void init_base(void)
 170 {
 171   PyObject *mod;
 172   addmethods(methods);
 173   INIT_MODULES;
 174   init_random();
 175   mod = Py_InitModule("catacomb._base", donemethods());
 176   INSERT_MODULES;
 177   INSERT("smallprimes", smallprimes());
 178   setconstants(mod, consts);
 179 }
 180
 181 /*----- That's all, folks -------------------------------------------------*/