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* Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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decode_primitive (const char *typename, const char *name, const char *forwstr)
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"e = decode_%s(p, len, %s, &l);\n"
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"e = der_get_%s(p, len, %s, &l);\n"
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"if(e) %s;\np += l; len -= l; ret += l;\n",
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is_primitive_type(int type)
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case TGeneralizedTime:
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case TPrintableString:
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case TUniversalString:
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find_tag (const Type *t,
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Der_class *cl, Der_type *ty, unsigned *tag)
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errx(1, "Cannot have recursive CHOICE");
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*tag = UT_Enumerated;
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*tag = UT_GeneralString;
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case TGeneralizedTime:
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*tag = UT_GeneralizedTime;
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*tag = UT_OctetString;
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case TPrintableString:
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*tag = UT_PrintableString;
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*cl = t->tag.tagclass;
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*ty = is_primitive_type(t->subtype->type) ? PRIM : CONS;
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*tag = t->tag.tagvalue;
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if ((t->symbol->stype == Stype && t->symbol->type == NULL)
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|| t->symbol->stype == SUndefined) {
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error_message("%s is imported or still undefined, "
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" can't generate tag checking data in CHOICE "
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"without this information",
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find_tag(t->symbol->type, cl, ty, tag);
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*tag = UT_UTF8String;
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case TUniversalString:
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*tag = UT_UniversalString;
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*tag = UT_VisibleString;
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range_check(const char *name,
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if (r->min == r->max + 2 || r->min < r->max)
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"if ((%s)->%s > %d) {\n"
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"e = ASN1_MAX_CONSTRAINT; %s;\n"
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name, length, r->max, forwstr);
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if (r->min - 1 == r->max || r->min < r->max)
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"if ((%s)->%s < %d) {\n"
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"e = ASN1_MIN_CONSTRAINT; %s;\n"
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name, length, r->min, forwstr);
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if (r->max == r->min)
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"if ((%s)->%s != %d) {\n"
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"e = ASN1_EXACT_CONSTRAINT; %s;\n"
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name, length, r->min, forwstr);
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decode_type (const char *name, const Type *t, int optional,
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const char *forwstr, const char *tmpstr)
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"%s = calloc(1, sizeof(*%s));\n"
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"if (%s == NULL) %s;\n",
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name, name, name, forwstr);
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"e = decode_%s(p, len, %s, &l);\n",
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t->symbol->gen_name, name);
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"p += l; len -= l; ret += l;\n"
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"p += l; len -= l; ret += l;\n");
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decode_primitive ("integer", "&enumint", forwstr);
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} else if (t->range == NULL) {
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decode_primitive ("heim_integer", name, forwstr);
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} else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
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decode_primitive ("integer", name, forwstr);
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} else if (t->range->min == 0 && t->range->max == UINT_MAX) {
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decode_primitive ("unsigned", name, forwstr);
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} else if (t->range->min == 0 && t->range->max == INT_MAX) {
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decode_primitive ("unsigned", name, forwstr);
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errx(1, "%s: unsupported range %d -> %d",
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name, t->range->min, t->range->max);
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decode_primitive ("boolean", name, forwstr);
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decode_primitive ("enumerated", name, forwstr);
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decode_primitive ("octet_string", name, forwstr);
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range_check(name, "length", forwstr, t->range);
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if (ASN1_TAILQ_EMPTY(t->members)) {
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decode_primitive ("bit_string", name, forwstr);
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"if (len < 1) return ASN1_OVERRUN;\n"
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"p++; len--; ret++;\n");
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"if (len < 1) break;\n");
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ASN1_TAILQ_FOREACH(m, t->members, members) {
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while (m->val / 8 > pos / 8) {
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"p++; len--; ret++;\n"
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"if (len < 1) break;\n");
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"(%s)->%s = (*p >> %d) & 1;\n",
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name, m->gen_name, 7 - m->val % 8);
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"p += len; ret += len;\n");
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if (t->members == NULL)
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ASN1_TAILQ_FOREACH(m, t->members, members) {
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asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&",
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decode_type (s, m->type, m->optional, forwstr, m->gen_name);
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if(t->members == NULL)
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fprintf(codefile, "{\n");
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fprintf(codefile, "unsigned int members = 0;\n");
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fprintf(codefile, "while(len > 0) {\n");
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"e = der_get_tag (p, len, &class, &type, &tag, NULL);\n"
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"if(e) %s;\n", forwstr);
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fprintf(codefile, "switch (MAKE_TAG(class, type, tag)) {\n");
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ASN1_TAILQ_FOREACH(m, t->members, members) {
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assert(m->type->type == TTag);
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fprintf(codefile, "case MAKE_TAG(%s, %s, %s):\n",
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classname(m->type->tag.tagclass),
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is_primitive_type(m->type->subtype->type) ? "PRIM" : "CONS",
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valuename(m->type->tag.tagclass, m->type->tag.tagvalue));
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asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
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"%s = calloc(1, sizeof(*%s));\n"
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"if (%s == NULL) { e = ENOMEM; %s; }\n",
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decode_type (s, m->type, 0, forwstr, m->gen_name);
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fprintf(codefile, "members |= (1 << %d);\n", memno);
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fprintf(codefile, "break;\n");
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"return ASN1_MISPLACED_FIELD;\n"
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fprintf(codefile, "}\n");
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fprintf(codefile, "}\n");
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ASN1_TAILQ_FOREACH(m, t->members, members) {
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asprintf (&s, "%s->%s", name, m->gen_name);
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fprintf(codefile, "if((members & (1 << %d)) == 0)\n", memno);
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fprintf(codefile, "%s = NULL;\n", s);
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gen_assign_defval(s, m->defval);
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fprintf(codefile, "return ASN1_MISSING_FIELD;\n");
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fprintf(codefile, "}\n");
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"size_t %s_origlen = len;\n"
426
"size_t %s_oldret = ret;\n"
427
"size_t %s_olen = 0;\n"
431
"(%s)->val = NULL;\n",
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"while(ret < %s_origlen) {\n"
441
"size_t %s_nlen = %s_olen + sizeof(*((%s)->val));\n"
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"if (%s_olen > %s_nlen) { e = ASN1_OVERFLOW; %s; }\n"
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"%s_olen = %s_nlen;\n"
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"%s_tmp = realloc((%s)->val, %s_olen);\n"
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"if (%s_tmp == NULL) { e = ENOMEM; %s; }\n"
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"(%s)->val = %s_tmp;\n",
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tmpstr, tmpstr, name,
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tmpstr, tmpstr, forwstr,
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tmpstr, name, tmpstr,
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asprintf (&n, "&(%s)->val[(%s)->len]", name, name);
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asprintf (&sname, "%s_s_of", tmpstr);
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decode_type (n, t->subtype, 0, forwstr, sname);
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"len = %s_origlen - ret;\n"
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"ret += %s_oldret;\n"
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range_check(name, "len", forwstr, t->range);
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case TGeneralizedTime:
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decode_primitive ("generalized_time", name, forwstr);
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decode_primitive ("general_string", name, forwstr);
487
"size_t %s_datalen, %s_oldlen;\n",
492
fprintf(codefile, "e = der_match_tag_and_length(p, len, %s, %s, %s, "
493
"&%s_datalen, &l);\n",
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classname(t->tag.tagclass),
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is_primitive_type(t->subtype->type) ? "PRIM" : "CONS",
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valuename(t->tag.tagclass, t->tag.tagvalue),
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"%s = calloc(1, sizeof(*%s));\n"
504
"if (%s == NULL) { e = ENOMEM; %s; }\n",
505
name, name, name, name, forwstr);
507
fprintf(codefile, "if(e) %s;\n", forwstr);
510
"p += l; len -= l; ret += l;\n"
511
"%s_oldlen = len;\n",
515
"if((dce_fix = _heim_fix_dce(%s_datalen, &len)) < 0)\n"
516
"{ e = ASN1_BAD_FORMAT; %s; }\n",
520
"if (%s_datalen > len) { e = ASN1_OVERRUN; %s; }\n"
521
"len = %s_datalen;\n", tmpstr, forwstr, tmpstr);
522
asprintf (&tname, "%s_Tag", tmpstr);
525
decode_type (name, t->subtype, 0, forwstr, tname);
529
"e = der_match_tag_and_length (p, len, "
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"(Der_class)0,(Der_type)0, UT_EndOfContent, "
531
"&%s_datalen, &l);\n"
532
"if(e) %s;\np += l; len -= l; ret += l;\n"
533
"} else \n", tmpstr, forwstr);
535
"len = %s_oldlen - %s_datalen;\n",
546
Member *m, *have_ellipsis = NULL;
547
const char *els = "";
549
if (t->members == NULL)
552
ASN1_TAILQ_FOREACH(m, t->members, members) {
553
const Type *tt = m->type;
564
find_tag(tt, &cl, &ty, &tag);
567
"%sif (der_match_tag(p, len, %s, %s, %s, NULL) == 0) {\n",
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ty ? "CONS" : "PRIM",
572
asprintf (&s, "%s(%s)->u.%s", m->optional ? "" : "&",
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decode_type (s, m->type, m->optional, forwstr, m->gen_name);
578
"(%s)->element = %s;\n",
588
"(%s)->u.%s.data = calloc(1, len);\n"
589
"if ((%s)->u.%s.data == NULL) {\n"
592
"(%s)->u.%s.length = len;\n"
593
"memcpy((%s)->u.%s.data, p, len);\n"
594
"(%s)->element = %s;\n"
599
name, have_ellipsis->gen_name,
600
name, have_ellipsis->gen_name,
602
name, have_ellipsis->gen_name,
603
name, have_ellipsis->gen_name,
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name, have_ellipsis->label);
608
"e = ASN1_PARSE_ERROR;\n"
616
decode_primitive ("utctime", name, forwstr);
619
decode_primitive ("utf8string", name, forwstr);
621
case TPrintableString:
622
decode_primitive ("printable_string", name, forwstr);
625
decode_primitive ("ia5_string", name, forwstr);
628
decode_primitive ("bmp_string", name, forwstr);
630
case TUniversalString:
631
decode_primitive ("universal_string", name, forwstr);
634
decode_primitive ("visible_string", name, forwstr);
637
fprintf (codefile, "/* NULL */\n");
640
decode_primitive ("oid", name, forwstr);
649
generate_type_decode (const Symbol *s)
651
int preserve = preserve_type(s->name) ? TRUE : FALSE;
655
"decode_%s(const unsigned char *, size_t, %s *, size_t *);\n",
656
s->gen_name, s->gen_name);
658
fprintf (codefile, "int\n"
659
"decode_%s(const unsigned char *p,"
660
" size_t len, %s *data, size_t *size)\n"
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s->gen_name, s->gen_name);
664
switch (s->type->type) {
669
case TGeneralizedTime:
672
case TPrintableString:
675
case TUniversalString:
693
fprintf (codefile, "const unsigned char *begin = p;\n");
695
fprintf (codefile, "\n");
696
fprintf (codefile, "memset(data, 0, sizeof(*data));\n"); /* hack to avoid `unused variable' */
698
decode_type ("data", s->type, 0, "goto fail", "Top");
701
"data->_save.data = calloc(1, ret);\n"
702
"if (data->_save.data == NULL) { \n"
703
"e = ENOMEM; goto fail; \n"
705
"data->_save.length = ret;\n"
706
"memcpy(data->_save.data, begin, ret);\n");
708
"if(size) *size = ret;\n"
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fprintf (codefile, "}\n\n");