src/lua/quvi/crypto/hash.c

   1 /* libquvi
   2  * Copyright (C) 2013  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <lauxlib.h>
  24 #include <gcrypt.h>
  25 #include <glib.h>
  26 #include <quvi.h>
  27
  28 #include "_quvi_s.h"
  29 /* -- */
  30 #include "gcrypt/crypto.h"
  31 #include "lua/quvi/crypto/opts.h"
  32 #include "lua/quvi/crypto/err.h"
  33 #include "lua/quvi/opts.h"
  34 #include "lua/getfield.h"
  35 #include "lua/setfield.h"
  36 #include "lua/def.h"
  37
  38 gint l_quvi_crypto_hash(lua_State *l)
  39 {
  40   struct l_quvi_object_crypto_opts_s co;
  41   gboolean croak_if_error;
  42   GSList *opts;
  43   crypto_t c;
  44   _quvi_t q;
  45
  46   memset(&co, 0, sizeof(struct l_quvi_object_crypto_opts_s));
  47
  48   /* quvi handle */
  49
  50   q = (_quvi_t) l_get_reg_userdata(l, USERDATA_QUVI_T);
  51   g_assert(q != NULL);
  52
  53   /* function args */
  54
  55   co.text = luaL_checkstring(l, 1);
  56   lua_pop(l, 1);
  57
  58   /* options */
  59
  60   opts = l_quvi_object_opts_new(l, 2);
  61   croak_if_error = l_quvi_object_opts_croak_if_error(l, opts);
  62   l_quvi_object_crypto_hash_chk_opts(l, opts, &co);
  63
  64   /* generate message digest (return as a hexstring). */
  65
  66   c = crypto_new(co.algoname, CRYPTO_MODE_HASH, NULL, -1, -1);
  67   q->status.rc = l_quvi_object_crypto_chk_if_failed(l, c, croak_if_error, q);
  68   {
  69     guchar *s;
  70     gsize n;
  71
  72     s = crypto_hex2bytes(co.text, &n);
  73     if (s != NULL)
  74       {
  75 #ifdef _1
  76         crypto_dump("s", s, n);
  77 #endif
  78         crypto_exec(c, s, n);
  79         g_free(s);
  80         q->status.rc =
  81           l_quvi_object_crypto_chk_if_failed(l, c, croak_if_error, q);
  82       }
  83     else
  84       l_quvi_object_crypto_invalid_hexstr(l, q, croak_if_error);
  85   }
  86
  87   /* Return a table of results. */
  88
  89   lua_newtable(l);
  90   l_setfield_s(l, QO_ERROR_MESSAGE, q->status.errmsg->str, -1);
  91   l_setfield_n(l, QO_QUVI_CODE, q->status.rc);
  92
  93   if (q->status.rc == QUVI_OK)
  94     {
  95       gchar *s = crypto_bytes2hex(c->out.data, c->out.dlen);
  96       l_setfield_s(l, QO_DIGEST, s, -1);
  97       g_free(s);
  98     }
  99
 100   l_quvi_object_opts_free(opts);
 101   crypto_free(c);
 102
 103   return (1); /* no. of returned values (a table) */
 104 }
 105
 106 /* vim: set ts=2 sw=2 tw=72 expandtab: */