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
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37 RCSID("$Id: gen_decode.c 19572 2006-12-29 17:30:32Z lha $");
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:
86 find_tag (const Type *t,
87 Der_class *cl, Der_type *ty, unsigned *tag)
101 errx(1, "Cannot have recursive CHOICE");
105 *tag = UT_Enumerated;
110 *tag = UT_GeneralString;
112 case TGeneralizedTime:
115 *tag = UT_GeneralizedTime;
140 *tag = UT_OctetString;
142 case TPrintableString:
145 *tag = UT_PrintableString;
160 *cl = t->tag.tagclass;
161 *ty = is_primitive_type(t->subtype->type) ? PRIM : CONS;
162 *tag = t->tag.tagvalue;
165 if ((t->symbol->stype == Stype && t->symbol->type == NULL)
166 || t->symbol->stype == SUndefined) {
167 error_message("%s is imported or still undefined, "
168 " can't generate tag checking data in CHOICE "
169 "without this information",
173 find_tag(t->symbol->type, cl, ty, tag);
183 *tag = UT_UTF8String;
190 case TUniversalString:
193 *tag = UT_UniversalString;
198 *tag = UT_VisibleString;
206 decode_type (const char *name, const Type *t, int optional,
207 const char *forwstr, const char *tmpstr)
213 "%s = calloc(1, sizeof(*%s));\n"
214 "if (%s == NULL) %s;\n",
215 name, name, name, forwstr);
217 "e = decode_%s(p, len, %s, &l);\n",
218 t->symbol->gen_name, name);
225 "p += l; len -= l; ret += l;\n"
233 "p += l; len -= l; ret += l;\n");
240 asprintf(&s, "(int*)%s", name);
242 errx (1, "out of memory");
243 decode_primitive ("integer", s, forwstr);
245 } else if (t->range == NULL) {
246 decode_primitive ("heim_integer", name, forwstr);
247 } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
248 decode_primitive ("integer", name, forwstr);
249 } else if (t->range->min == 0 && t->range->max == UINT_MAX) {
250 decode_primitive ("unsigned", name, forwstr);
251 } else if (t->range->min == 0 && t->range->max == INT_MAX) {
252 decode_primitive ("unsigned", name, forwstr);
254 errx(1, "%s: unsupported range %d -> %d",
255 name, t->range->min, t->range->max);
258 decode_primitive ("boolean", name, forwstr);
261 decode_primitive ("enumerated", name, forwstr);
264 decode_primitive ("octet_string", name, forwstr);
270 if (ASN1_TAILQ_EMPTY(t->members)) {
271 decode_primitive ("bit_string", name, forwstr);
275 "if (len < 1) return ASN1_OVERRUN;\n"
276 "p++; len--; ret++;\n");
279 "if (len < 1) break;\n");
280 ASN1_TAILQ_FOREACH(m, t->members, members) {
281 while (m->val / 8 > pos / 8) {
283 "p++; len--; ret++;\n"
284 "if (len < 1) break;\n");
288 "(%s)->%s = (*p >> %d) & 1;\n",
289 name, m->gen_name, 7 - m->val % 8);
294 "p += len; ret += len;\n");
300 if (t->members == NULL)
303 ASN1_TAILQ_FOREACH(m, t->members, members) {
309 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&",
313 decode_type (s, m->type, m->optional, forwstr, m->gen_name);
323 if(t->members == NULL)
326 fprintf(codefile, "{\n");
327 fprintf(codefile, "unsigned int members = 0;\n");
328 fprintf(codefile, "while(len > 0) {\n");
333 "e = der_get_tag (p, len, &class, &type, &tag, NULL);\n"
334 "if(e) %s;\n", forwstr);
335 fprintf(codefile, "switch (MAKE_TAG(class, type, tag)) {\n");
337 ASN1_TAILQ_FOREACH(m, t->members, members) {
340 assert(m->type->type == TTag);
342 fprintf(codefile, "case MAKE_TAG(%s, %s, %s):\n",
343 classname(m->type->tag.tagclass),
344 is_primitive_type(m->type->subtype->type) ? "PRIM" : "CONS",
345 valuename(m->type->tag.tagclass, m->type->tag.tagvalue));
347 asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
352 "%s = calloc(1, sizeof(*%s));\n"
353 "if (%s == NULL) { e = ENOMEM; %s; }\n",
355 decode_type (s, m->type, 0, forwstr, m->gen_name);
358 fprintf(codefile, "members |= (1 << %d);\n", memno);
360 fprintf(codefile, "break;\n");
364 "return ASN1_MISPLACED_FIELD;\n"
366 fprintf(codefile, "}\n");
367 fprintf(codefile, "}\n");
369 ASN1_TAILQ_FOREACH(m, t->members, members) {
372 asprintf (&s, "%s->%s", name, m->gen_name);
375 fprintf(codefile, "if((members & (1 << %d)) == 0)\n", memno);
377 fprintf(codefile, "%s = NULL;\n", s);
379 gen_assign_defval(s, m->defval);
381 fprintf(codefile, "return ASN1_MISSING_FIELD;\n");
385 fprintf(codefile, "}\n");
395 "size_t %s_origlen = len;\n"
396 "size_t %s_oldret = ret;\n"
400 "(%s)->val = NULL;\n"
401 "while(ret < %s_origlen) {\n"
402 "%s_tmp = realloc((%s)->val, "
403 " sizeof(*((%s)->val)) * ((%s)->len + 1));\n"
404 "if (%s_tmp == NULL) { %s; }\n"
405 "(%s)->val = %s_tmp;\n",
406 tmpstr, tmpstr, tmpstr,
413 asprintf (&n, "&(%s)->val[(%s)->len]", name, name);
416 asprintf (&sname, "%s_s_of", tmpstr);
419 decode_type (n, t->subtype, 0, forwstr, sname);
422 "len = %s_origlen - ret;\n"
424 "ret += %s_oldret;\n"
432 case TGeneralizedTime:
433 decode_primitive ("generalized_time", name, forwstr);
436 decode_primitive ("general_string", name, forwstr);
443 "size_t %s_datalen, %s_oldlen;\n",
448 fprintf(codefile, "e = der_match_tag_and_length(p, len, %s, %s, %s, "
449 "&%s_datalen, &l);\n",
450 classname(t->tag.tagclass),
451 is_primitive_type(t->subtype->type) ? "PRIM" : "CONS",
452 valuename(t->tag.tagclass, t->tag.tagvalue),
459 "%s = calloc(1, sizeof(*%s));\n"
460 "if (%s == NULL) { e = ENOMEM; %s; }\n",
461 name, name, name, name, forwstr);
463 fprintf(codefile, "if(e) %s;\n", forwstr);
466 "p += l; len -= l; ret += l;\n"
467 "%s_oldlen = len;\n",
471 "if((dce_fix = _heim_fix_dce(%s_datalen, &len)) < 0)\n"
472 "{ e = ASN1_BAD_FORMAT; %s; }\n",
476 "if (%s_datalen > len) { e = ASN1_OVERRUN; %s; }\n"
477 "len = %s_datalen;\n", tmpstr, forwstr, tmpstr);
478 asprintf (&tname, "%s_Tag", tmpstr);
481 decode_type (name, t->subtype, 0, forwstr, tname);
485 "e = der_match_tag_and_length (p, len, "
486 "(Der_class)0,(Der_type)0, UT_EndOfContent, "
487 "&%s_datalen, &l);\n"
488 "if(e) %s;\np += l; len -= l; ret += l;\n"
489 "} else \n", tmpstr, forwstr);
491 "len = %s_oldlen - %s_datalen;\n",
502 Member *m, *have_ellipsis = NULL;
503 const char *els = "";
505 if (t->members == NULL)
508 ASN1_TAILQ_FOREACH(m, t->members, members) {
509 const Type *tt = m->type;
520 find_tag(tt, &cl, &ty, &tag);
523 "%sif (der_match_tag(p, len, %s, %s, %s, NULL) == 0) {\n",
526 ty ? "CONS" : "PRIM",
528 asprintf (&s, "%s(%s)->u.%s", m->optional ? "" : "&",
532 decode_type (s, m->type, m->optional, forwstr, m->gen_name);
534 "(%s)->element = %s;\n",
544 "(%s)->u.%s.data = calloc(1, len);\n"
545 "if ((%s)->u.%s.data == NULL) {\n"
548 "(%s)->u.%s.length = len;\n"
549 "memcpy((%s)->u.%s.data, p, len);\n"
550 "(%s)->element = %s;\n"
555 name, have_ellipsis->gen_name,
556 name, have_ellipsis->gen_name,
558 name, have_ellipsis->gen_name,
559 name, have_ellipsis->gen_name,
560 name, have_ellipsis->label);
564 "e = ASN1_PARSE_ERROR;\n"
572 decode_primitive ("utctime", name, forwstr);
575 decode_primitive ("utf8string", name, forwstr);
577 case TPrintableString:
578 decode_primitive ("printable_string", name, forwstr);
581 decode_primitive ("ia5_string", name, forwstr);
584 decode_primitive ("bmp_string", name, forwstr);
586 case TUniversalString:
587 decode_primitive ("universal_string", name, forwstr);
590 decode_primitive ("visible_string", name, forwstr);
593 fprintf (codefile, "/* NULL */\n");
596 decode_primitive ("oid", name, forwstr);
605 generate_type_decode (const Symbol *s)
607 int preserve = preserve_type(s->name) ? TRUE : FALSE;
611 "decode_%s(const unsigned char *, size_t, %s *, size_t *);\n",
612 s->gen_name, s->gen_name);
614 fprintf (codefile, "int\n"
615 "decode_%s(const unsigned char *p,"
616 " size_t len, %s *data, size_t *size)\n"
618 s->gen_name, s->gen_name);
620 switch (s->type->type) {
625 case TGeneralizedTime:
628 case TPrintableString:
631 case TUniversalString:
649 fprintf (codefile, "const unsigned char *begin = p;\n");
651 fprintf (codefile, "\n");
652 fprintf (codefile, "memset(data, 0, sizeof(*data));\n"); /* hack to avoid `unused variable' */
654 decode_type ("data", s->type, 0, "goto fail", "Top");
657 "data->_save.data = calloc(1, ret);\n"
658 "if (data->_save.data == NULL) { \n"
659 "e = ENOMEM; goto fail; \n"
661 "data->_save.length = ret;\n"
662 "memcpy(data->_save.data, begin, ret);\n");
664 "if(size) *size = ret;\n"
675 fprintf (codefile, "}\n\n");