lib/asn1/gen_length.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("$Id$");
  37
  38 static void
  39 length_primitive (const char *typename,
  40                   const char *name,
  41                   const char *variable)
  42 {
  43     fprintf (codefile, "%s += der_length_%s(%s);\n", variable, typename, name);
  44 }
  45
  46 /* XXX same as der_length_tag */
  47 static size_t
  48 length_tag(unsigned int tag)
  49 {
  50     size_t len = 0;
  51
  52     if(tag <= 30)
  53         return 1;
  54     while(tag) {
  55         tag /= 128;
  56         len++;
  57     }
  58     return len + 1;
  59 }
  60
  61
  62 static int
  63 length_type (const char *name, const Type *t,
  64              const char *variable, const char *tmpstr)
  65 {
  66     switch (t->type) {
  67     case TType:
  68 #if 0
  69         length_type (name, t->symbol->type);
  70 #endif
  71         fprintf (codefile, "%s += length_%s(%s);\n",
  72                  variable, t->symbol->gen_name, name);
  73         break;
  74     case TInteger:
  75         if(t->members) {
  76             fprintf(codefile,
  77                     "{\n"
  78                     "int enumint = *%s;\n", name);
  79             length_primitive ("integer", "&enumint", variable);
  80             fprintf(codefile, "}\n");
  81         } else if (t->range == NULL) {
  82             length_primitive ("heim_integer", name, variable);
  83         } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
  84             length_primitive ("integer", name, variable);
  85         } else if (t->range->min == 0 && t->range->max == UINT_MAX) {
  86             length_primitive ("unsigned", name, variable);
  87         } else if (t->range->min == 0 && t->range->max == INT_MAX) {
  88             length_primitive ("unsigned", name, variable);
  89         } else
  90             errx(1, "%s: unsupported range %d -> %d",
  91                  name, t->range->min, t->range->max);
  92
  93         break;
  94     case TBoolean:
  95         fprintf (codefile, "%s += 1;\n", variable);
  96         break;
  97     case TEnumerated :
  98         length_primitive ("enumerated", name, variable);
  99         break;
 100     case TOctetString:
 101         length_primitive ("octet_string", name, variable);
 102         break;
 103     case TBitString: {
 104         if (ASN1_TAILQ_EMPTY(t->members))
 105             length_primitive("bit_string", name, variable);
 106         else {
 107             if (!rfc1510_bitstring) {
 108                 Member *m;
 109                 int pos = ASN1_TAILQ_LAST(t->members, memhead)->val;
 110
 111                 fprintf(codefile,
 112                         "do {\n");
 113                 ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
 114                     while (m->val / 8 < pos / 8) {
 115                         pos -= 8;
 116                     }
 117                     fprintf (codefile,
 118                              "if((%s)->%s) { %s += %d; break; }\n",
 119                              name, m->gen_name, variable, (pos + 8) / 8);
 120                 }
 121                 fprintf(codefile,
 122                         "} while(0);\n");
 123                 fprintf (codefile, "%s += 1;\n", variable);
 124             } else {
 125                 fprintf (codefile, "%s += 5;\n", variable);
 126             }
 127         }
 128         break;
 129     }
 130     case TSet:
 131     case TSequence:
 132     case TChoice: {
 133         Member *m, *have_ellipsis = NULL;
 134
 135         if (t->members == NULL)
 136             break;
 137
 138         if(t->type == TChoice)
 139             fprintf (codefile, "switch((%s)->element) {\n", name);
 140
 141         ASN1_TAILQ_FOREACH(m, t->members, members) {
 142             char *s;
 143
 144             if (m->ellipsis) {
 145                 have_ellipsis = m;
 146                 continue;
 147             }
 148
 149             if(t->type == TChoice)
 150                 fprintf(codefile, "case %s:\n", m->label);
 151
 152             if (asprintf (&s, "%s(%s)->%s%s",
 153                           m->optional ? "" : "&", name,
 154                           t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
 155                 errx(1, "malloc");
 156             if (m->optional)
 157                 fprintf (codefile, "if(%s)", s);
 158             else if(m->defval)
 159                 gen_compare_defval(s + 1, m->defval);
 160             fprintf (codefile, "{\n"
 161                      "size_t %s_oldret = %s;\n"
 162                      "%s = 0;\n", tmpstr, variable, variable);
 163             length_type (s, m->type, "ret", m->gen_name);
 164             fprintf (codefile, "ret += %s_oldret;\n", tmpstr);
 165             fprintf (codefile, "}\n");
 166             free (s);
 167             if(t->type == TChoice)
 168                 fprintf(codefile, "break;\n");
 169         }
 170         if(t->type == TChoice) {
 171             if (have_ellipsis)
 172                 fprintf(codefile,
 173                         "case %s:\n"
 174                         "ret += (%s)->u.%s.length;\n"
 175                         "break;\n",
 176                         have_ellipsis->label,
 177                         name,
 178                         have_ellipsis->gen_name);
 179             fprintf (codefile, "}\n"); /* switch */
 180         }
 181         break;
 182     }
 183     case TSetOf:
 184     case TSequenceOf: {
 185         char *n = NULL;
 186         char *sname = NULL;
 187
 188         fprintf (codefile,
 189                  "{\n"
 190                  "size_t %s_oldret = %s;\n"
 191                  "int i;\n"
 192                  "%s = 0;\n",
 193                  tmpstr, variable, variable);
 194
 195         fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name);
 196         fprintf (codefile, "size_t %s_for_oldret = %s;\n"
 197                  "%s = 0;\n", tmpstr, variable, variable);
 198         if (asprintf (&n, "&(%s)->val[i]", name) < 0  || n == NULL)
 199             errx(1, "malloc");
 200         if (asprintf (&sname, "%s_S_Of", tmpstr) < 0 || sname == NULL)
 201             errx(1, "malloc");
 202         length_type(n, t->subtype, variable, sname);
 203         fprintf (codefile, "%s += %s_for_oldret;\n",
 204                  variable, tmpstr);
 205         fprintf (codefile, "}\n");
 206
 207         fprintf (codefile,
 208                  "%s += %s_oldret;\n"
 209                  "}\n", variable, tmpstr);
 210         free(n);
 211         free(sname);
 212         break;
 213     }
 214     case TGeneralizedTime:
 215         length_primitive ("generalized_time", name, variable);
 216         break;
 217     case TGeneralString:
 218         length_primitive ("general_string", name, variable);
 219         break;
 220     case TTeletexString:
 221         length_primitive ("general_string", name, variable);
 222         break;
 223     case TUTCTime:
 224         length_primitive ("utctime", name, variable);
 225         break;
 226     case TUTF8String:
 227         length_primitive ("utf8string", name, variable);
 228         break;
 229     case TPrintableString:
 230         length_primitive ("printable_string", name, variable);
 231         break;
 232     case TIA5String:
 233         length_primitive ("ia5_string", name, variable);
 234         break;
 235     case TBMPString:
 236         length_primitive ("bmp_string", name, variable);
 237         break;
 238     case TUniversalString:
 239         length_primitive ("universal_string", name, variable);
 240         break;
 241     case TVisibleString:
 242         length_primitive ("visible_string", name, variable);
 243         break;
 244     case TNull:
 245         fprintf (codefile, "/* NULL */\n");
 246         break;
 247     case TTag:{
 248         char *tname = NULL;
 249         if (asprintf(&tname, "%s_tag", tmpstr) < 0 || tname == NULL)
 250             errx(1, "malloc");
 251         length_type (name, t->subtype, variable, tname);
 252         fprintf (codefile, "ret += %lu + der_length_len (ret);\n",
 253                  (unsigned long)length_tag(t->tag.tagvalue));
 254         free(tname);
 255         break;
 256     }
 257     case TOID:
 258         length_primitive ("oid", name, variable);
 259         break;
 260     default :
 261         abort ();
 262     }
 263     return 0;
 264 }
 265
 266 void
 267 generate_type_length (const Symbol *s)
 268 {
 269     fprintf (codefile,
 270              "size_t ASN1CALL\n"
 271              "length_%s(const %s *data)\n"
 272              "{\n"
 273              "size_t ret = 0;\n",
 274              s->gen_name, s->gen_name);
 275
 276     length_type ("data", s->type, "ret", "Top");
 277     fprintf (codefile, "return ret;\n}\n\n");
 278 }
 279