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 <= INT64_MAX) {
  84             length_primitive ("integer64", name, variable);
  85         } else if (t->range->min >= 0 && t->range->max > UINT_MAX) {
  86             length_primitive ("unsigned64", name, variable);
  87         } else if (t->range->min >= INT_MIN && t->range->max <= INT_MAX) {
  88             length_primitive ("integer", name, variable);
  89         } else if (t->range->min >= 0 && t->range->max <= UINT_MAX) {
  90             length_primitive ("unsigned", name, variable);
  91         } else
  92             errx(1, "%s: unsupported range %lld -> %lld",
  93                  name, (long long)t->range->min, (long long)t->range->max);
  94         break;
  95     case TBoolean:
  96         fprintf (codefile, "%s += 1;\n", variable);
  97         break;
  98     case TEnumerated :
  99         length_primitive ("enumerated", name, variable);
 100         break;
 101     case TOctetString:
 102         length_primitive ("octet_string", name, variable);
 103         break;
 104     case TBitString: {
 105         if (ASN1_TAILQ_EMPTY(t->members))
 106             length_primitive("bit_string", name, variable);
 107         else {
 108             if (!rfc1510_bitstring) {
 109                 Member *m;
 110                 int pos = ASN1_TAILQ_LAST(t->members, memhead)->val;
 111
 112                 fprintf(codefile,
 113                         "do {\n");
 114                 ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
 115                     while (m->val / 8 < pos / 8) {
 116                         pos -= 8;
 117                     }
 118                     fprintf (codefile,
 119                              "if((%s)->%s) { %s += %d; break; }\n",
 120                              name, m->gen_name, variable, (pos + 8) / 8);
 121                 }
 122                 fprintf(codefile,
 123                         "} while(0);\n");
 124                 fprintf (codefile, "%s += 1;\n", variable);
 125             } else {
 126                 fprintf (codefile, "%s += 5;\n", variable);
 127             }
 128         }
 129         break;
 130     }
 131     case TSet:
 132     case TSequence:
 133     case TChoice: {
 134         Member *m, *have_ellipsis = NULL;
 135
 136         if (t->members == NULL)
 137             break;
 138
 139         if(t->type == TChoice)
 140             fprintf (codefile, "switch((%s)->element) {\n", name);
 141
 142         ASN1_TAILQ_FOREACH(m, t->members, members) {
 143             char *s;
 144
 145             if (m->ellipsis) {
 146                 have_ellipsis = m;
 147                 continue;
 148             }
 149
 150             if(t->type == TChoice)
 151                 fprintf(codefile, "case %s:\n", m->label);
 152
 153             if (asprintf (&s, "%s(%s)->%s%s",
 154                           m->optional ? "" : "&", name,
 155                           t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
 156                 errx(1, "malloc");
 157             if (m->optional)
 158                 fprintf (codefile, "if(%s)", s);
 159             else if(m->defval)
 160                 gen_compare_defval(s + 1, m->defval);
 161             fprintf (codefile, "{\n"
 162                      "size_t %s_oldret = %s;\n"
 163                      "%s = 0;\n", tmpstr, variable, variable);
 164             length_type (s, m->type, "ret", m->gen_name);
 165             fprintf (codefile, "ret += %s_oldret;\n", tmpstr);
 166             fprintf (codefile, "}\n");
 167             free (s);
 168             if(t->type == TChoice)
 169                 fprintf(codefile, "break;\n");
 170         }
 171         if(t->type == TChoice) {
 172             if (have_ellipsis)
 173                 fprintf(codefile,
 174                         "case %s:\n"
 175                         "ret += (%s)->u.%s.length;\n"
 176                         "break;\n",
 177                         have_ellipsis->label,
 178                         name,
 179                         have_ellipsis->gen_name);
 180             fprintf (codefile, "}\n"); /* switch */
 181         }
 182         break;
 183     }
 184     case TSetOf:
 185     case TSequenceOf: {
 186         char *n = NULL;
 187         char *sname = NULL;
 188
 189         fprintf (codefile,
 190                  "{\n"
 191                  "size_t %s_oldret = %s;\n"
 192                  "unsigned int n_%s;\n"
 193                  "%s = 0;\n",
 194                  tmpstr, variable, tmpstr, variable);
 195
 196         fprintf (codefile, "for(n_%s = (%s)->len; n_%s > 0; --n_%s){\n",
 197                  tmpstr, name, tmpstr, tmpstr);
 198         fprintf (codefile, "size_t %s_for_oldret = %s;\n"
 199                  "%s = 0;\n", tmpstr, variable, variable);
 200         if (asprintf (&n, "&(%s)->val[n_%s - 1]", name, tmpstr) < 0  || n == NULL)
 201             errx(1, "malloc");
 202         if (asprintf (&sname, "%s_S_Of", tmpstr) < 0 || 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 = NULL;
 251         if (asprintf(&tname, "%s_tag", tmpstr) < 0 || tname == NULL)
 252             errx(1, "malloc");
 253         length_type (name, t->subtype, variable, tname);
 254         fprintf (codefile, "ret += %lu + der_length_len (ret);\n",
 255                  (unsigned long)length_tag(t->tag.tagvalue));
 256         free(tname);
 257         break;
 258     }
 259     case TOID:
 260         length_primitive ("oid", name, variable);
 261         break;
 262     default :
 263         abort ();
 264     }
 265     return 0;
 266 }
 267
 268 void
 269 generate_type_length (const Symbol *s)
 270 {
 271     fprintf (codefile,
 272              "size_t ASN1CALL\n"
 273              "length_%s(const %s *data)\n"
 274              "{\n"
 275              "size_t ret = 0;\n",
 276              s->gen_name, s->gen_name);
 277
 278     length_type ("data", s->type, "ret", "Top");
 279     fprintf (codefile, "return ret;\n}\n\n");
 280 }
 281