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(PMODE_READ), C(PMODE_VERIFY),
  40   C(KOPEN_READ), C(KOPEN_WRITE), C(KOPEN_NOFILE),
  41   C(KEXP_FOREVER), C(KEXP_EXPIRE),
  42   C(KF_ENCMASK), C(KENC_BINARY), C(KENC_MP), C(KENC_STRUCT),
  43     C(KENC_ENCRYPT), C(KENC_STRING), C(KENC_EC),
  44   C(KF_CATMASK), C(KCAT_SYMM), C(KCAT_PRIV), C(KCAT_PUB), C(KCAT_SHARE),
  45   C(KF_NONSECRET),
  46   C(KF_BURN), C(KF_OPT),
  47   C(EC_XONLY), C(EC_YBIT), C(EC_LSB), C(EC_CMPR), C(EC_EXPLY), C(EC_SORT),
  48   C(X25519_KEYSZ), C(X25519_PUBSZ), C(X25519_OUTSZ),
  49   C(X448_KEYSZ), C(X448_PUBSZ), C(X448_OUTSZ),
  50   C(ED25519_KEYSZ), C(ED25519_PUBSZ), C(ED25519_SIGSZ),
  51 #define ENTRY(tag, val, str) C(KERR_##tag),
  52   KEY_ERRORS(ENTRY)
  53 #undef ENTRY
  54 #undef C
  55   { 0 }
  56 };
  57
  58 PyObject *mexp_common(PyObject *me, PyObject *arg,
  59                       size_t efsz,
  60                       PyObject *(*id)(PyObject *),
  61                       int (*fill)(void *, PyObject *,
  62                                   PyObject *, PyObject *),
  63                       PyObject *(*exp)(PyObject *, void *, int),
  64                       void (*drop)(void *))
  65 {
  66   int i = 0, j, n, flat;
  67   PyObject *qq, *x, *y, *z = 0;
  68   char *v = 0, *vv;
  69
  70   if (PyTuple_Size(arg) == 1)
  71     arg = PyTuple_GetItem(arg, 0);
  72   Py_INCREF(arg);
  73   if (!PySequence_Check(arg)) TYERR("not a sequence");
  74   n = PySequence_Size(arg); if (!n) { z = id(me); goto end; }
  75   x = PySequence_GetItem(arg, 0);
  76   if (PySequence_Check(x))
  77     flat = 0;
  78   else {
  79     if (n % 2) VALERR("must have even number of arguments");
  80     n /= 2;
  81     flat = 1;
  82   }
  83   Py_DECREF(x);
  84
  85   v = xmalloc(n * efsz);
  86   for (i = j = 0, vv = v; i < n; i++, vv += efsz) {
  87     if (flat) {
  88       x = PySequence_GetItem(arg, j++);
  89       y = PySequence_GetItem(arg, j++);
  90     } else {
  91       qq = PySequence_GetItem(arg, j++);
  92       if (!qq) goto end;
  93       if (!PySequence_Check(qq) || PySequence_Size(qq) != 2) {
  94         Py_DECREF(qq);
  95         TYERR("want a sequence of pairs");
  96       }
  97       x = PySequence_GetItem(qq, 0);
  98       y = PySequence_GetItem(qq, 1);
  99       Py_DECREF(qq);
 100     }
 101     if (!x || !y) goto end;
 102     if (fill(vv, me, x, y)) {
 103       Py_DECREF(x);
 104       Py_DECREF(y);
 105       if (!PyErr_Occurred())
 106         PyErr_SetString(PyExc_TypeError, "type mismatch");
 107       goto end;
 108     }
 109     Py_DECREF(x);
 110     Py_DECREF(y);
 111   }
 112   z = exp(me, v, n);
 113
 114 end:
 115   if (v) {
 116     for (j = 0, vv = v; j < i; j++, vv += efsz)
 117       drop(vv);
 118     xfree(v);
 119   }
 120   Py_DECREF(arg);
 121   return (z);
 122 }
 123
 124 static PyObject *smallprimes(void)
 125 {
 126   PyObject *v = PyList_New(NPRIME);
 127   int i;
 128
 129   for (i = 0; i < NPRIME; i++)
 130     PyList_SetItem(v, i, PyInt_FromLong(primetab[i]));
 131   return (v);
 132 }
 133
 134 static PyObject *meth__ego(PyObject *me, PyObject *arg)
 135 {
 136   char *argv0;
 137   if (!PyArg_ParseTuple(arg, "s:_ego", &argv0))
 138     return (0);
 139   if (strcmp(QUIS, "<UNNAMED>") == 0)
 140     ego(argv0);
 141   RETURN_NONE;
 142 }
 143
 144 static PyMethodDef methods[] = {
 145 #define METHNAME(func) meth_##func
 146   METH  (_ego,                  "_ego(ARGV0)")
 147 #undef METHNAME
 148   { 0 }
 149 };
 150
 151 static void init_random(void)
 152 {
 153 #if PY_MAJOR_VERSION >= 3 || (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6)
 154   char *seed;
 155   uint32 r;
 156
 157   if (!Py_HashRandomizationFlag) return;
 158   seed = getenv("PYTHONHASHSEED");
 159   if (!seed || strcmp(seed, "random") == 0) r = GR_WORD(&rand_global);
 160   else r = strtoul(seed, 0, 0);
 161   if (!r) r = 0xe011f220; /* zero doesn't work well */
 162   unihash_setkey(&unihash_global, r);
 163 #endif
 164 }
 165
 166 void init_base(void)
 167 {
 168   PyObject *mod;
 169   addmethods(methods);
 170   INIT_MODULES;
 171   init_random();
 172   mod = Py_InitModule("catacomb._base", donemethods());
 173   INSERT_MODULES;
 174   INSERT("smallprimes", smallprimes());
 175   setconstants(mod, consts);
 176 }
 177
 178 /*----- That's all, folks -------------------------------------------------*/