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 static size_t
  47 length_tag(unsigned int tag)
  48 {
  49     size_t len = 0;
  50
  51     if(tag <= 30)
  52         return 1;
  53     while(tag) {
  54         tag /= 128;
  55         len++;
  56     }
  57     return len + 1;
  58 }
  59
  60
  61 static int
  62 length_type (const char *name, const Type *t,
  63              const char *variable, const char *tmpstr)
  64 {
  65     switch (t->type) {
  66     case TType:
  67 #if 0
  68         length_type (name, t->symbol->type);
  69 #endif
  70         fprintf (codefile, "%s += length_%s(%s);\n",
  71                  variable, t->symbol->gen_name, name);
  72         break;
  73     case TInteger:
  74         if(t->members) {
  75             fprintf(codefile,
  76                     "{\n"
  77                     "int enumint = *%s;\n", name);
  78             length_primitive ("integer", "&enumint", variable);
  79             fprintf(codefile, "}\n");
  80         } else if (t->range == NULL) {
  81             length_primitive ("heim_integer", name, variable);
  82         } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
  83             length_primitive ("integer", name, variable);
  84         } else if (t->range->min == 0 && t->range->max == UINT_MAX) {
  85             length_primitive ("unsigned", name, variable);
  86         } else if (t->range->min == 0 && t->range->max == INT_MAX) {
  87             length_primitive ("unsigned", name, variable);
  88         } else
  89             errx(1, "%s: unsupported range %d -> %d",
  90                  name, t->range->min, t->range->max);
  91
  92         break;
  93     case TBoolean:
  94         fprintf (codefile, "%s += 1;\n", variable);
  95         break;
  96     case TEnumerated :
  97         length_primitive ("enumerated", name, variable);
  98         break;
  99     case TOctetString:
 100         length_primitive ("octet_string", name, variable);
 101         break;
 102     case TBitString: {
 103         if (ASN1_TAILQ_EMPTY(t->members))
 104             length_primitive("bit_string", name, variable);
 105         else {
 106             if (!rfc1510_bitstring) {
 107                 Member *m;
 108                 int pos = ASN1_TAILQ_LAST(t->members, memhead)->val;
 109
 110                 fprintf(codefile,
 111                         "do {\n");
 112                 ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
 113                     while (m->val / 8 < pos / 8) {
 114                         pos -= 8;
 115                     }
 116                     fprintf (codefile,
 117                              "if((%s)->%s) { %s += %d; break; }\n",
 118                              name, m->gen_name, variable, (pos + 8) / 8);
 119                 }
 120                 fprintf(codefile,
 121                         "} while(0);\n");
 122                 fprintf (codefile, "%s += 1;\n", variable);
 123             } else {
 124                 fprintf (codefile, "%s += 5;\n", variable);
 125             }
 126         }
 127         break;
 128     }
 129     case TSet:
 130     case TSequence:
 131     case TChoice: {
 132         Member *m, *have_ellipsis = NULL;
 133
 134         if (t->members == NULL)
 135             break;
 136
 137         if(t->type == TChoice)
 138             fprintf (codefile, "switch((%s)->element) {\n", name);
 139
 140         ASN1_TAILQ_FOREACH(m, t->members, members) {
 141             char *s;
 142
 143             if (m->ellipsis) {
 144                 have_ellipsis = m;
 145                 continue;
 146             }
 147
 148             if(t->type == TChoice)
 149                 fprintf(codefile, "case %s:\n", m->label);
 150
 151             asprintf (&s, "%s(%s)->%s%s",
 152                       m->optional ? "" : "&", name,
 153                       t->type == TChoice ? "u." : "", m->gen_name);
 154             if (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;
 186         char *sname;
 187
 188         fprintf (codefile,
 189                  "{\n"
 190                  "int %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, "int %s_for_oldret = %s;\n"
 197                  "%s = 0;\n", tmpstr, variable, variable);
 198         asprintf (&n, "&(%s)->val[i]", name);
 199         if (n == NULL)
 200             errx(1, "malloc");
 201         asprintf (&sname, "%s_S_Of", tmpstr);
 202         if (sname == NULL)
 203             errx(1, "malloc");
 204         length_type(n, t->subtype, variable, sname);
 205         fprintf (codefile, "%s += %s_for_oldret;\n",
 206                  variable, tmpstr);
 207         fprintf (codefile, "}\n");
 208
 209         fprintf (codefile,
 210                  "%s += %s_oldret;\n"
 211                  "}\n", variable, tmpstr);
 212         free(n);
 213         free(sname);
 214         break;
 215     }
 216     case TGeneralizedTime:
 217         length_primitive ("generalized_time", name, variable);
 218         break;
 219     case TGeneralString:
 220         length_primitive ("general_string", name, variable);
 221         break;
 222     case TTeletexString:
 223         length_primitive ("general_string", name, variable);
 224         break;
 225     case TUTCTime:
 226         length_primitive ("utctime", name, variable);
 227         break;
 228     case TUTF8String:
 229         length_primitive ("utf8string", name, variable);
 230         break;
 231     case TPrintableString:
 232         length_primitive ("printable_string", name, variable);
 233         break;
 234     case TIA5String:
 235         length_primitive ("ia5_string", name, variable);
 236         break;
 237     case TBMPString:
 238         length_primitive ("bmp_string", name, variable);
 239         break;
 240     case TUniversalString:
 241         length_primitive ("universal_string", name, variable);
 242         break;
 243     case TVisibleString:
 244         length_primitive ("visible_string", name, variable);
 245         break;
 246     case TNull:
 247         fprintf (codefile, "/* NULL */\n");
 248         break;
 249     case TTag:{
 250         char *tname;
 251         asprintf(&tname, "%s_tag", tmpstr);
 252         if (tname == NULL)
 253             errx(1, "malloc");
 254         length_type (name, t->subtype, variable, tname);
 255         fprintf (codefile, "ret += %lu + der_length_len (ret);\n",
 256                  (unsigned long)length_tag(t->tag.tagvalue));
 257         free(tname);
 258         break;
 259     }
 260     case TOID:
 261         length_primitive ("oid", name, variable);
 262         break;
 263     default :
 264         abort ();
 265     }
 266     return 0;
 267 }
 268
 269 void
 270 generate_type_length (const Symbol *s)
 271 {
 272     fprintf (headerfile,
 273              "size_t length_%s(const %s *);\n",
 274              s->gen_name, s->gen_name);
 275
 276     fprintf (codefile,
 277              "size_t\n"
 278              "length_%s(const %s *data)\n"
 279              "{\n"
 280              "size_t ret = 0;\n",
 281              s->gen_name, s->gen_name);
 282
 283     length_type ("data", s->type, "ret", "Top");
 284     fprintf (codefile, "return ret;\n}\n\n");
 285 }
 286