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