2 * Copyright (c) 1997 - 2006 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
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:
74 case TPrintableString:
77 case TUniversalString:
87 find_tag (const Type *t,
88 Der_class *cl, Der_type *ty, unsigned *tag)
102 errx(1, "Cannot have recursive CHOICE");
106 *tag = UT_Enumerated;
111 *tag = UT_GeneralString;
116 *tag = UT_TeletexString;
118 case TGeneralizedTime:
121 *tag = UT_GeneralizedTime;
146 *tag = UT_OctetString;
148 case TPrintableString:
151 *tag = UT_PrintableString;
166 *cl = t->tag.tagclass;
167 *ty = is_primitive_type(t->subtype->type) ? PRIM : CONS;
168 *tag = t->tag.tagvalue;
171 if ((t->symbol->stype == Stype && t->symbol->type == NULL)
172 || t->symbol->stype == SUndefined) {
173 error_message("%s is imported or still undefined, "
174 " can't generate tag checking data in CHOICE "
175 "without this information",
179 find_tag(t->symbol->type, cl, ty, tag);
189 *tag = UT_UTF8String;
196 case TUniversalString:
199 *tag = UT_UniversalString;
204 *tag = UT_VisibleString;
212 range_check(const char *name,
217 if (r->min == r->max + 2 || r->min < r->max)
219 "if ((%s)->%s > %d) {\n"
220 "e = ASN1_MAX_CONSTRAINT; %s;\n"
222 name, length, r->max, forwstr);
223 if (r->min - 1 == r->max || r->min < r->max)
225 "if ((%s)->%s < %d) {\n"
226 "e = ASN1_MIN_CONSTRAINT; %s;\n"
228 name, length, r->min, forwstr);
229 if (r->max == r->min)
231 "if ((%s)->%s != %d) {\n"
232 "e = ASN1_EXACT_CONSTRAINT; %s;\n"
234 name, length, r->min, forwstr);
238 decode_type (const char *name, const Type *t, int optional,
239 const char *forwstr, const char *tmpstr, const char *dertype)
245 "%s = calloc(1, sizeof(*%s));\n"
246 "if (%s == NULL) %s;\n",
247 name, name, name, forwstr);
249 "e = decode_%s(p, len, %s, &l);\n",
250 t->symbol->gen_name, name);
257 "p += l; len -= l; ret += l;\n"
265 "p += l; len -= l; ret += l;\n");
274 decode_primitive ("integer", "&enumint", forwstr);
279 } else if (t->range == NULL) {
280 decode_primitive ("heim_integer", name, forwstr);
281 } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
282 decode_primitive ("integer", name, forwstr);
283 } else if (t->range->min == 0 && t->range->max == UINT_MAX) {
284 decode_primitive ("unsigned", name, forwstr);
285 } else if (t->range->min == 0 && t->range->max == INT_MAX) {
286 decode_primitive ("unsigned", name, forwstr);
288 errx(1, "%s: unsupported range %d -> %d",
289 name, t->range->min, t->range->max);
292 decode_primitive ("boolean", name, forwstr);
295 decode_primitive ("enumerated", name, forwstr);
300 "if (%s == CONS) {\n",
302 decode_primitive("octet_string_ber", name, forwstr);
306 decode_primitive ("octet_string", name, forwstr);
308 fprintf(codefile, "}\n");
310 range_check(name, "length", forwstr, t->range);
316 if (ASN1_TAILQ_EMPTY(t->members)) {
317 decode_primitive ("bit_string", name, forwstr);
321 "if (len < 1) return ASN1_OVERRUN;\n"
322 "p++; len--; ret++;\n");
325 "if (len < 1) break;\n");
326 ASN1_TAILQ_FOREACH(m, t->members, members) {
327 while (m->val / 8 > pos / 8) {
329 "p++; len--; ret++;\n"
330 "if (len < 1) break;\n");
334 "(%s)->%s = (*p >> %d) & 1;\n",
335 name, m->gen_name, 7 - m->val % 8);
340 "p += len; ret += len;\n");
346 if (t->members == NULL)
349 ASN1_TAILQ_FOREACH(m, t->members, members) {
355 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&",
359 decode_type (s, m->type, m->optional, forwstr, m->gen_name, NULL);
369 if(t->members == NULL)
372 fprintf(codefile, "{\n");
373 fprintf(codefile, "unsigned int members = 0;\n");
374 fprintf(codefile, "while(len > 0) {\n");
379 "e = der_get_tag (p, len, &class, &type, &tag, NULL);\n"
380 "if(e) %s;\n", forwstr);
381 fprintf(codefile, "switch (MAKE_TAG(class, type, tag)) {\n");
383 ASN1_TAILQ_FOREACH(m, t->members, members) {
386 assert(m->type->type == TTag);
388 fprintf(codefile, "case MAKE_TAG(%s, %s, %s):\n",
389 classname(m->type->tag.tagclass),
390 is_primitive_type(m->type->subtype->type) ? "PRIM" : "CONS",
391 valuename(m->type->tag.tagclass, m->type->tag.tagvalue));
393 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
398 "%s = calloc(1, sizeof(*%s));\n"
399 "if (%s == NULL) { e = ENOMEM; %s; }\n",
401 decode_type (s, m->type, 0, forwstr, m->gen_name, NULL);
404 fprintf(codefile, "members |= (1 << %d);\n", memno);
406 fprintf(codefile, "break;\n");
410 "return ASN1_MISPLACED_FIELD;\n"
412 fprintf(codefile, "}\n");
413 fprintf(codefile, "}\n");
415 ASN1_TAILQ_FOREACH(m, t->members, members) {
418 asprintf (&s, "%s->%s", name, m->gen_name);
421 fprintf(codefile, "if((members & (1 << %d)) == 0)\n", memno);
423 fprintf(codefile, "%s = NULL;\n", s);
425 gen_assign_defval(s, m->defval);
427 fprintf(codefile, "return ASN1_MISSING_FIELD;\n");
431 fprintf(codefile, "}\n");
441 "size_t %s_origlen = len;\n"
442 "size_t %s_oldret = ret;\n"
443 "size_t %s_olen = 0;\n"
447 "(%s)->val = NULL;\n",
456 "while(ret < %s_origlen) {\n"
457 "size_t %s_nlen = %s_olen + sizeof(*((%s)->val));\n"
458 "if (%s_olen > %s_nlen) { e = ASN1_OVERFLOW; %s; }\n"
459 "%s_olen = %s_nlen;\n"
460 "%s_tmp = realloc((%s)->val, %s_olen);\n"
461 "if (%s_tmp == NULL) { e = ENOMEM; %s; }\n"
462 "(%s)->val = %s_tmp;\n",
464 tmpstr, tmpstr, name,
465 tmpstr, tmpstr, forwstr,
467 tmpstr, name, tmpstr,
471 asprintf (&n, "&(%s)->val[(%s)->len]", name, name);
474 asprintf (&sname, "%s_s_of", tmpstr);
477 decode_type (n, t->subtype, 0, forwstr, sname, NULL);
480 "len = %s_origlen - ret;\n"
482 "ret += %s_oldret;\n"
487 range_check(name, "len", forwstr, t->range);
492 case TGeneralizedTime:
493 decode_primitive ("generalized_time", name, forwstr);
496 decode_primitive ("general_string", name, forwstr);
499 decode_primitive ("general_string", name, forwstr);
502 char *tname, *typestring;
505 asprintf(&typestring, "%s_type", tmpstr);
509 "size_t %s_datalen, %s_oldlen;\n"
511 tmpstr, tmpstr, typestring);
514 "int is_indefinite;\n");
516 fprintf(codefile, "e = der_match_tag_and_length(p, len, %s, &%s, %s, "
517 "&%s_datalen, &l);\n",
518 classname(t->tag.tagclass),
520 valuename(t->tag.tagclass, t->tag.tagvalue),
523 /* XXX hardcode for now */
524 if (support_ber && t->subtype->type == TOctetString) {
528 "if (e == 0 && %s != %s) { e = ASN1_BAD_ID; }\n",
530 is_primitive_type(t->subtype->type) ? "PRIM" : "CONS");
538 "%s = calloc(1, sizeof(*%s));\n"
539 "if (%s == NULL) { e = ENOMEM; %s; }\n",
540 name, name, name, name, forwstr);
542 fprintf(codefile, "if(e) %s;\n", forwstr);
545 "p += l; len -= l; ret += l;\n"
546 "%s_oldlen = len;\n",
550 "if((is_indefinite = _heim_fix_dce(%s_datalen, &len)) < 0)\n"
551 "{ e = ASN1_BAD_FORMAT; %s; }\n"
552 "if (is_indefinite) { if (len < 2) { e = ASN1_OVERRUN; %s; } len -= 2; }",
553 tmpstr, forwstr, forwstr);
556 "if (%s_datalen > len) { e = ASN1_OVERRUN; %s; }\n"
557 "len = %s_datalen;\n", tmpstr, forwstr, tmpstr);
558 asprintf (&tname, "%s_Tag", tmpstr);
561 decode_type (name, t->subtype, 0, forwstr, tname, ide);
564 "if(is_indefinite){\n"
566 "e = der_match_tag_and_length(p, len, "
567 "(Der_class)0, &%s, UT_EndOfContent, "
568 "&%s_datalen, &l);\n"
570 "p += l; len -= l; ret += l;\n"
571 "if (%s != (Der_type)0) { e = ASN1_BAD_ID; %s; }\n"
576 typestring, forwstr);
578 "len = %s_oldlen - %s_datalen;\n",
590 Member *m, *have_ellipsis = NULL;
591 const char *els = "";
593 if (t->members == NULL)
596 ASN1_TAILQ_FOREACH(m, t->members, members) {
597 const Type *tt = m->type;
608 find_tag(tt, &cl, &ty, &tag);
611 "%sif (der_match_tag(p, len, %s, %s, %s, NULL) == 0) {\n",
614 ty ? "CONS" : "PRIM",
616 asprintf (&s, "%s(%s)->u.%s", m->optional ? "" : "&",
620 decode_type (s, m->type, m->optional, forwstr, m->gen_name, NULL);
622 "(%s)->element = %s;\n",
632 "(%s)->u.%s.data = calloc(1, len);\n"
633 "if ((%s)->u.%s.data == NULL && len != 0) {\n"
636 "(%s)->u.%s.length = len;\n"
637 "memcpy((%s)->u.%s.data, p, len);\n"
638 "(%s)->element = %s;\n"
643 name, have_ellipsis->gen_name,
644 name, have_ellipsis->gen_name,
646 name, have_ellipsis->gen_name,
647 name, have_ellipsis->gen_name,
648 name, have_ellipsis->label);
652 "e = ASN1_PARSE_ERROR;\n"
660 decode_primitive ("utctime", name, forwstr);
663 decode_primitive ("utf8string", name, forwstr);
665 case TPrintableString:
666 decode_primitive ("printable_string", name, forwstr);
669 decode_primitive ("ia5_string", name, forwstr);
672 decode_primitive ("bmp_string", name, forwstr);
674 case TUniversalString:
675 decode_primitive ("universal_string", name, forwstr);
678 decode_primitive ("visible_string", name, forwstr);
681 fprintf (codefile, "/* NULL */\n");
684 decode_primitive ("oid", name, forwstr);
693 generate_type_decode (const Symbol *s)
695 int preserve = preserve_type(s->name) ? TRUE : FALSE;
699 "decode_%s(const unsigned char *, size_t, %s *, size_t *);\n",
700 s->gen_name, s->gen_name);
702 fprintf (codefile, "int\n"
703 "decode_%s(const unsigned char *p,"
704 " size_t len, %s *data, size_t *size)\n"
706 s->gen_name, s->gen_name);
708 switch (s->type->type) {
713 case TGeneralizedTime:
717 case TPrintableString:
720 case TUniversalString:
738 fprintf (codefile, "const unsigned char *begin = p;\n");
740 fprintf (codefile, "\n");
741 fprintf (codefile, "memset(data, 0, sizeof(*data));\n"); /* hack to avoid `unused variable' */
743 decode_type ("data", s->type, 0, "goto fail", "Top", NULL);
746 "data->_save.data = calloc(1, ret);\n"
747 "if (data->_save.data == NULL && ret != 0) { \n"
748 "e = ENOMEM; goto fail; \n"
750 "data->_save.length = ret;\n"
751 "memcpy(data->_save.data, begin, ret);\n");
753 "if(size) *size = ret;\n"
764 fprintf (codefile, "}\n\n");