crypto/dist/heimdal/lib/asn1/gen_copy.c

   1 /*
   2  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gen_locl.h"
  35
  36 __RCSID("$Heimdal: gen_copy.c 19539 2006-12-28 17:15:05Z lha $"
  37         "$NetBSD$");
  38
  39 static int used_fail;
  40
  41 static void
  42 copy_primitive (const char *typename, const char *from, const char *to)
  43 {
  44     fprintf (codefile, "if(der_copy_%s(%s, %s)) goto fail;\n",
  45              typename, from, to);
  46     used_fail++;
  47 }
  48
  49 static void
  50 copy_type (const char *from, const char *to, const Type *t, int preserve)
  51 {
  52     switch (t->type) {
  53     case TType:
  54 #if 0
  55         copy_type (from, to, t->symbol->type, preserve);
  56 #endif
  57         fprintf (codefile, "if(copy_%s(%s, %s)) goto fail;\n",
  58                  t->symbol->gen_name, from, to);
  59         used_fail++;
  60         break;
  61     case TInteger:
  62         if (t->range == NULL && t->members == NULL) {
  63             copy_primitive ("heim_integer", from, to);
  64             break;
  65         }
  66     case TBoolean:
  67     case TEnumerated :
  68         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  69         break;
  70     case TOctetString:
  71         copy_primitive ("octet_string", from, to);
  72         break;
  73     case TBitString:
  74         if (ASN1_TAILQ_EMPTY(t->members))
  75             copy_primitive ("bit_string", from, to);
  76         else
  77             fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  78         break;
  79     case TSet:
  80     case TSequence:
  81     case TChoice: {
  82         Member *m, *have_ellipsis = NULL;
  83
  84         if(t->members == NULL)
  85             break;
  86
  87         if ((t->type == TSequence || t->type == TChoice) && preserve) {
  88             fprintf(codefile,
  89                     "{ int ret;\n"
  90                     "ret = der_copy_octet_string(&(%s)->_save, &(%s)->_save);\n"
  91                     "if (ret) goto fail;\n"
  92                     "}\n",
  93                     from, to);
  94             used_fail++;
  95         }
  96
  97         if(t->type == TChoice) {
  98             fprintf(codefile, "(%s)->element = (%s)->element;\n", to, from);
  99             fprintf(codefile, "switch((%s)->element) {\n", from);
 100         }
 101
 102         ASN1_TAILQ_FOREACH(m, t->members, members) {
 103             char *fs;
 104             char *ts;
 105
 106             if (m->ellipsis) {
 107                 have_ellipsis = m;
 108                 continue;
 109             }
 110
 111             if(t->type == TChoice)
 112                 fprintf(codefile, "case %s:\n", m->label);
 113
 114             asprintf (&fs, "%s(%s)->%s%s",
 115                       m->optional ? "" : "&", from,
 116                       t->type == TChoice ? "u." : "", m->gen_name);
 117             if (fs == NULL)
 118                 errx(1, "malloc");
 119             asprintf (&ts, "%s(%s)->%s%s",
 120                       m->optional ? "" : "&", to,
 121                       t->type == TChoice ? "u." : "", m->gen_name);
 122             if (ts == NULL)
 123                 errx(1, "malloc");
 124             if(m->optional){
 125                 fprintf(codefile, "if(%s) {\n", fs);
 126                 fprintf(codefile, "%s = malloc(sizeof(*%s));\n", ts, ts);
 127                 fprintf(codefile, "if(%s == NULL) goto fail;\n", ts);
 128                 used_fail++;
 129             }
 130             copy_type (fs, ts, m->type, FALSE);
 131             if(m->optional){
 132                 fprintf(codefile, "}else\n");
 133                 fprintf(codefile, "%s = NULL;\n", ts);
 134             }
 135             free (fs);
 136             free (ts);
 137             if(t->type == TChoice)
 138                 fprintf(codefile, "break;\n");
 139         }
 140         if(t->type == TChoice) {
 141             if (have_ellipsis) {
 142                 fprintf(codefile, "case %s: {\n"
 143                         "int ret;\n"
 144                         "ret=der_copy_octet_string(&(%s)->u.%s, &(%s)->u.%s);\n"
 145                         "if (ret) goto fail;\n"
 146                         "break;\n"
 147                         "}\n",
 148                         have_ellipsis->label,
 149                         from, have_ellipsis->gen_name,
 150                         to, have_ellipsis->gen_name);
 151                 used_fail++;
 152             }
 153             fprintf(codefile, "}\n");
 154         }
 155         break;
 156     }
 157     case TSetOf:
 158     case TSequenceOf: {
 159         char *f;
 160         char *T;
 161
 162         fprintf (codefile, "if(((%s)->val = "
 163                  "malloc((%s)->len * sizeof(*(%s)->val))) == NULL && (%s)->len != 0)\n",
 164                  to, from, to, from);
 165         fprintf (codefile, "goto fail;\n");
 166         used_fail++;
 167         fprintf(codefile,
 168                 "for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
 169                 to, to, from, to);
 170         asprintf(&f, "&(%s)->val[(%s)->len]", from, to);
 171         if (f == NULL)
 172             errx(1, "malloc");
 173         asprintf(&T, "&(%s)->val[(%s)->len]", to, to);
 174         if (T == NULL)
 175             errx(1, "malloc");
 176         copy_type(f, T, t->subtype, FALSE);
 177         fprintf(codefile, "}\n");
 178         free(f);
 179         free(T);
 180         break;
 181     }
 182     case TGeneralizedTime:
 183         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 184         break;
 185     case TGeneralString:
 186         copy_primitive ("general_string", from, to);
 187         break;
 188     case TUTCTime:
 189         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 190         break;
 191     case TUTF8String:
 192         copy_primitive ("utf8string", from, to);
 193         break;
 194     case TPrintableString:
 195         copy_primitive ("printable_string", from, to);
 196         break;
 197     case TIA5String:
 198         copy_primitive ("ia5_string", from, to);
 199         break;
 200     case TBMPString:
 201         copy_primitive ("bmp_string", from, to);
 202         break;
 203     case TUniversalString:
 204         copy_primitive ("universal_string", from, to);
 205         break;
 206     case TVisibleString:
 207         copy_primitive ("visible_string", from, to);
 208         break;
 209     case TTag:
 210         copy_type (from, to, t->subtype, preserve);
 211         break;
 212     case TOID:
 213         copy_primitive ("oid", from, to);
 214         break;
 215     case TNull:
 216         break;
 217     default :
 218         abort ();
 219     }
 220 }
 221
 222 void
 223 generate_type_copy (const Symbol *s)
 224 {
 225   int preserve = preserve_type(s->name) ? TRUE : FALSE;
 226
 227   used_fail = 0;
 228
 229   fprintf (headerfile,
 230            "int    copy_%s  (const %s *, %s *);\n",
 231            s->gen_name, s->gen_name, s->gen_name);
 232
 233   fprintf (codefile, "int\n"
 234            "copy_%s(const %s *from, %s *to)\n"
 235            "{\n"
 236            "memset(to, 0, sizeof(*to));\n",
 237            s->gen_name, s->gen_name, s->gen_name);
 238   copy_type ("from", "to", s->type, preserve);
 239   fprintf (codefile, "return 0;\n");
 240
 241   if (used_fail)
 242       fprintf (codefile, "fail:\n"
 243                "free_%s(to);\n"
 244                "return ENOMEM;\n",
 245                s->gen_name);
 246
 247   fprintf(codefile,
 248           "}\n\n");
 249 }
 250