2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
37 RCSID("$Id: gen_decode.c,v 1.30 2006/09/24 09:13:12 lha Exp $");
40 decode_primitive (const char *typename, const char *name, const char *forwstr)
44 "e = decode_%s(p, len, %s, &l);\n"
51 "e = der_get_%s(p, len, %s, &l);\n"
52 "if(e) %s;\np += l; len -= l; ret += l;\n",
60 is_primitive_type(int type)
68 case TGeneralizedTime:
73 case TPrintableString:
76 case TUniversalString:
85 find_tag (const Type *t,
86 Der_class *cl, Der_type *ty, unsigned *tag)
100 errx(1, "Cannot have recursive CHOICE");
104 *tag = UT_Enumerated;
109 *tag = UT_GeneralString;
111 case TGeneralizedTime:
114 *tag = UT_GeneralizedTime;
139 *tag = UT_OctetString;
141 case TPrintableString:
144 *tag = UT_PrintableString;
159 *cl = t->tag.tagclass;
160 *ty = is_primitive_type(t->subtype->type) ? PRIM : CONS;
161 *tag = t->tag.tagvalue;
164 if ((t->symbol->stype == Stype && t->symbol->type == NULL)
165 || t->symbol->stype == SUndefined) {
166 error_message("%s is imported or still undefined, "
167 " can't generate tag checking data in CHOICE "
168 "without this information",
172 find_tag(t->symbol->type, cl, ty, tag);
182 *tag = UT_UTF8String;
189 case TUniversalString:
192 *tag = UT_UniversalString;
200 decode_type (const char *name, const Type *t, int optional,
201 const char *forwstr, const char *tmpstr)
207 "%s = calloc(1, sizeof(*%s));\n"
208 "if (%s == NULL) %s;\n",
209 name, name, name, forwstr);
211 "e = decode_%s(p, len, %s, &l);\n",
212 t->symbol->gen_name, name);
219 "p += l; len -= l; ret += l;\n"
227 "p += l; len -= l; ret += l;\n");
234 asprintf(&s, "(int*)%s", name);
236 errx (1, "out of memory");
237 decode_primitive ("integer", s, forwstr);
239 } else if (t->range == NULL) {
240 decode_primitive ("heim_integer", name, forwstr);
241 } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
242 decode_primitive ("integer", name, forwstr);
243 } else if (t->range->min == 0 && t->range->max == UINT_MAX) {
244 decode_primitive ("unsigned", name, forwstr);
245 } else if (t->range->min == 0 && t->range->max == INT_MAX) {
246 decode_primitive ("unsigned", name, forwstr);
248 errx(1, "%s: unsupported range %d -> %d",
249 name, t->range->min, t->range->max);
252 decode_primitive ("boolean", name, forwstr);
255 decode_primitive ("enumerated", name, forwstr);
258 decode_primitive ("octet_string", name, forwstr);
264 if (ASN1_TAILQ_EMPTY(t->members)) {
265 decode_primitive ("bit_string", name, forwstr);
269 "if (len < 1) return ASN1_OVERRUN;\n"
270 "p++; len--; ret++;\n");
273 "if (len < 1) break;\n");
274 ASN1_TAILQ_FOREACH(m, t->members, members) {
275 while (m->val / 8 > pos / 8) {
277 "p++; len--; ret++;\n"
278 "if (len < 1) break;\n");
282 "(%s)->%s = (*p >> %d) & 1;\n",
283 name, m->gen_name, 7 - m->val % 8);
288 "p += len; ret += len;\n");
294 if (t->members == NULL)
297 ASN1_TAILQ_FOREACH(m, t->members, members) {
303 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&",
307 decode_type (s, m->type, m->optional, forwstr, m->gen_name);
317 if(t->members == NULL)
320 fprintf(codefile, "{\n");
321 fprintf(codefile, "unsigned int members = 0;\n");
322 fprintf(codefile, "while(len > 0) {\n");
327 "e = der_get_tag (p, len, &class, &type, &tag, NULL);\n"
328 "if(e) %s;\n", forwstr);
329 fprintf(codefile, "switch (MAKE_TAG(class, type, tag)) {\n");
331 ASN1_TAILQ_FOREACH(m, t->members, members) {
334 assert(m->type->type == TTag);
336 fprintf(codefile, "case MAKE_TAG(%s, %s, %s):\n",
337 classname(m->type->tag.tagclass),
338 is_primitive_type(m->type->subtype->type) ? "PRIM" : "CONS",
339 valuename(m->type->tag.tagclass, m->type->tag.tagvalue));
341 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
346 "%s = calloc(1, sizeof(*%s));\n"
347 "if (%s == NULL) { e = ENOMEM; %s; }\n",
349 decode_type (s, m->type, 0, forwstr, m->gen_name);
352 fprintf(codefile, "members |= (1 << %d);\n", memno);
354 fprintf(codefile, "break;\n");
358 "return ASN1_MISPLACED_FIELD;\n"
360 fprintf(codefile, "}\n");
361 fprintf(codefile, "}\n");
363 ASN1_TAILQ_FOREACH(m, t->members, members) {
366 asprintf (&s, "%s->%s", name, m->gen_name);
369 fprintf(codefile, "if((members & (1 << %d)) == 0)\n", memno);
371 fprintf(codefile, "%s = NULL;\n", s);
373 gen_assign_defval(s, m->defval);
375 fprintf(codefile, "return ASN1_MISSING_FIELD;\n");
379 fprintf(codefile, "}\n");
389 "size_t %s_origlen = len;\n"
390 "size_t %s_oldret = ret;\n"
394 "(%s)->val = NULL;\n"
395 "while(ret < %s_origlen) {\n"
396 "%s_tmp = realloc((%s)->val, "
397 " sizeof(*((%s)->val)) * ((%s)->len + 1));\n"
398 "if (%s_tmp == NULL) { %s; }\n"
399 "(%s)->val = %s_tmp;\n",
400 tmpstr, tmpstr, tmpstr,
407 asprintf (&n, "&(%s)->val[(%s)->len]", name, name);
410 asprintf (&sname, "%s_s_of", tmpstr);
413 decode_type (n, t->subtype, 0, forwstr, sname);
416 "len = %s_origlen - ret;\n"
418 "ret += %s_oldret;\n"
426 case TGeneralizedTime:
427 decode_primitive ("generalized_time", name, forwstr);
430 decode_primitive ("general_string", name, forwstr);
437 "size_t %s_datalen, %s_oldlen;\n",
442 fprintf(codefile, "e = der_match_tag_and_length(p, len, %s, %s, %s, "
443 "&%s_datalen, &l);\n",
444 classname(t->tag.tagclass),
445 is_primitive_type(t->subtype->type) ? "PRIM" : "CONS",
446 valuename(t->tag.tagclass, t->tag.tagvalue),
453 "%s = calloc(1, sizeof(*%s));\n"
454 "if (%s == NULL) { e = ENOMEM; %s; }\n",
455 name, name, name, name, forwstr);
457 fprintf(codefile, "if(e) %s;\n", forwstr);
460 "p += l; len -= l; ret += l;\n"
461 "%s_oldlen = len;\n",
465 "if((dce_fix = _heim_fix_dce(%s_datalen, &len)) < 0)\n"
466 "{ e = ASN1_BAD_FORMAT; %s; }\n",
470 "if (%s_datalen > len) { e = ASN1_OVERRUN; %s; }\n"
471 "len = %s_datalen;\n", tmpstr, forwstr, tmpstr);
472 asprintf (&tname, "%s_Tag", tmpstr);
475 decode_type (name, t->subtype, 0, forwstr, tname);
479 "e = der_match_tag_and_length (p, len, "
480 "(Der_class)0,(Der_type)0, UT_EndOfContent, "
481 "&%s_datalen, &l);\n"
482 "if(e) %s;\np += l; len -= l; ret += l;\n"
483 "} else \n", tmpstr, forwstr);
485 "len = %s_oldlen - %s_datalen;\n",
496 Member *m, *have_ellipsis = NULL;
497 const char *els = "";
499 if (t->members == NULL)
502 ASN1_TAILQ_FOREACH(m, t->members, members) {
503 const Type *tt = m->type;
514 find_tag(tt, &cl, &ty, &tag);
517 "%sif (der_match_tag(p, len, %s, %s, %s, NULL) == 0) {\n",
520 ty ? "CONS" : "PRIM",
522 asprintf (&s, "%s(%s)->u.%s", m->optional ? "" : "&",
526 decode_type (s, m->type, m->optional, forwstr, m->gen_name);
528 "(%s)->element = %s;\n",
538 "(%s)->u.%s.data = calloc(1, len);\n"
539 "if ((%s)->u.%s.data == NULL) {\n"
542 "(%s)->u.%s.length = len;\n"
543 "memcpy((%s)->u.%s.data, p, len);\n"
544 "(%s)->element = %s;\n"
549 name, have_ellipsis->gen_name,
550 name, have_ellipsis->gen_name,
552 name, have_ellipsis->gen_name,
553 name, have_ellipsis->gen_name,
554 name, have_ellipsis->label);
558 "e = ASN1_PARSE_ERROR;\n"
566 decode_primitive ("utctime", name, forwstr);
569 decode_primitive ("utf8string", name, forwstr);
571 case TPrintableString:
572 decode_primitive ("printable_string", name, forwstr);
575 decode_primitive ("ia5_string", name, forwstr);
578 decode_primitive ("bmp_string", name, forwstr);
580 case TUniversalString:
581 decode_primitive ("universal_string", name, forwstr);
584 fprintf (codefile, "/* NULL */\n");
587 decode_primitive ("oid", name, forwstr);
596 generate_type_decode (const Symbol *s)
598 int preserve = preserve_type(s->name) ? TRUE : FALSE;
602 "decode_%s(const unsigned char *, size_t, %s *, size_t *);\n",
603 s->gen_name, s->gen_name);
605 fprintf (codefile, "int\n"
606 "decode_%s(const unsigned char *p,"
607 " size_t len, %s *data, size_t *size)\n"
609 s->gen_name, s->gen_name);
611 switch (s->type->type) {
616 case TGeneralizedTime:
619 case TPrintableString:
622 case TUniversalString:
639 fprintf (codefile, "const unsigned char *begin = p;\n");
641 fprintf (codefile, "\n");
642 fprintf (codefile, "memset(data, 0, sizeof(*data));\n"); /* hack to avoid `unused variable' */
644 decode_type ("data", s->type, 0, "goto fail", "Top");
647 "data->_save.data = calloc(1, ret);\n"
648 "if (data->_save.data == NULL) { \n"
649 "e = ENOMEM; goto fail; \n"
651 "data->_save.length = ret;\n"
652 "memcpy(data->_save.data, begin, ret);\n");
654 "if(size) *size = ret;\n"
665 fprintf (codefile, "}\n\n");