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-rw-r--r--third_party/heimdal/lib/asn1/gen_free.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/asn1/gen_free.c b/third_party/heimdal/lib/asn1/gen_free.c
new file mode 100644
index 0000000..b6da8ae
--- /dev/null
+++ b/third_party/heimdal/lib/asn1/gen_free.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "gen_locl.h"
+
+RCSID("$Id$");
+
+static void
+free_primitive (const char *typename, const char *name)
+{
+ fprintf (codefile, "der_free_%s(%s);\n", typename, name);
+}
+
+static void
+free_type (const char *name, const Type *t, int preserve)
+{
+ switch (t->type) {
+ case TType:
+#if 0
+ free_type (name, t->symbol->type, preserve);
+#endif
+ fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
+ break;
+ case TInteger:
+ if (t->range == NULL && t->members == NULL) {
+ free_primitive ("heim_integer", name);
+ break;
+ }
+ /* fallthrough; */
+ case TBoolean:
+ case TEnumerated :
+ case TNull:
+ case TGeneralizedTime:
+ case TUTCTime:
+ /*
+ * This doesn't do much, but it leaves zeros where garbage might
+ * otherwise have been found. Gets us closer to having the equivalent
+ * of a memset()-to-zero data structure after calling the free
+ * functions.
+ */
+ fprintf(codefile, "*%s = 0;\n", name);
+ break;
+ case TBitString:
+ if (HEIM_TAILQ_EMPTY(t->members))
+ free_primitive("bit_string", name);
+ break;
+ case TOctetString:
+ free_primitive ("octet_string", name);
+ break;
+ case TChoice:
+ case TSet:
+ case TSequence: {
+ Member *m, *have_ellipsis = NULL;
+
+ if (t->members == NULL)
+ break;
+
+ if ((t->type == TSequence || t->type == TChoice) && preserve)
+ fprintf(codefile, "der_free_octet_string(&data->_save);\n");
+
+ if(t->type == TChoice)
+ fprintf(codefile, "switch((%s)->element) {\n", name);
+
+ HEIM_TAILQ_FOREACH(m, t->members, members) {
+ char *s;
+
+ if (m->ellipsis){
+ have_ellipsis = m;
+ continue;
+ }
+
+ if(t->type == TChoice)
+ fprintf(codefile, "case %s:\n", m->label);
+ if (asprintf (&s, "%s(%s)->%s%s",
+ m->optional ? "" : "&", name,
+ t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
+ errx(1, "malloc");
+ if(m->optional)
+ fprintf(codefile, "if(%s) {\n", s);
+ free_type (s, m->type, FALSE);
+ if(m->optional)
+ fprintf(codefile,
+ "free(%s);\n"
+ "%s = NULL;\n"
+ "}\n",s, s);
+ free (s);
+ if(t->type == TChoice)
+ fprintf(codefile, "break;\n");
+ }
+
+ if(t->type == TChoice) {
+ if (have_ellipsis)
+ fprintf(codefile,
+ "case %s:\n"
+ "der_free_octet_string(&(%s)->u.%s);\n"
+ "break;",
+ have_ellipsis->label,
+ name, have_ellipsis->gen_name);
+ fprintf(codefile, "}\n");
+ }
+ break;
+ }
+ case TSetOf:
+ case TSequenceOf: {
+ char *n;
+
+ fprintf (codefile, "if ((%s)->val)\nwhile((%s)->len){\n", name, name);
+ if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
+ errx(1, "malloc");
+ free_type(n, t->subtype, FALSE);
+ fprintf(codefile,
+ "(%s)->len--;\n"
+ "} else (%s)->len = 0;\n",
+ name, name);
+ fprintf(codefile,
+ "free((%s)->val);\n"
+ "(%s)->val = NULL;\n", name, name);
+ free(n);
+ break;
+ }
+ case TGeneralString:
+ free_primitive ("general_string", name);
+ break;
+ case TTeletexString:
+ free_primitive ("general_string", name);
+ break;
+ case TUTF8String:
+ free_primitive ("utf8string", name);
+ break;
+ case TPrintableString:
+ free_primitive ("printable_string", name);
+ break;
+ case TIA5String:
+ free_primitive ("ia5_string", name);
+ break;
+ case TBMPString:
+ free_primitive ("bmp_string", name);
+ break;
+ case TUniversalString:
+ free_primitive ("universal_string", name);
+ break;
+ case TVisibleString:
+ free_primitive ("visible_string", name);
+ break;
+ case TTag:
+ free_type (name, t->subtype, preserve);
+ break;
+ case TOID :
+ free_primitive ("oid", name);
+ break;
+ default :
+ abort ();
+ }
+}
+
+void
+generate_type_free (const Symbol *s)
+{
+ struct decoration deco;
+ ssize_t more_deco = -1;
+ int preserve = preserve_type(s->name) ? TRUE : FALSE;
+
+ fprintf (codefile, "void ASN1CALL\n"
+ "free_%s(%s *data)\n"
+ "{\n",
+ s->gen_name, s->gen_name);
+
+ free_type ("data", s->type, preserve);
+ while (decorate_type(s->gen_name, &deco, &more_deco)) {
+ if (deco.ext && deco.free_function_name == NULL) {
+ /* Decorated with field of external type but no free function */
+ if (deco.ptr)
+ fprintf(codefile, "(data)->%s = 0;\n", deco.field_name);
+ else
+ fprintf(codefile,
+ "memset(&(data)->%s, 0, sizeof((data)->%s));\n",
+ deco.field_name, deco.field_name);
+ } else if (deco.ext) {
+ /* Decorated with field of external type w/ free function */
+ if (deco.ptr) {
+ fprintf(codefile, "if ((data)->%s) {\n", deco.field_name);
+ fprintf(codefile, "%s((data)->%s);\n",
+ deco.free_function_name, deco.field_name);
+ fprintf(codefile, "(data)->%s = 0;\n", deco.field_name);
+ fprintf(codefile, "}\n");
+ } else {
+ fprintf(codefile, "%s(&(data)->%s);\n",
+ deco.free_function_name, deco.field_name);
+ fprintf(codefile,
+ "memset(&(data)->%s, 0, sizeof((data)->%s));\n",
+ deco.field_name, deco.field_name);
+ }
+ } else if (deco.opt) {
+ /* Decorated with optional field of ASN.1 type */
+ fprintf(codefile, "if ((data)->%s) {\n", deco.field_name);
+ fprintf(codefile, "free_%s((data)->%s);\n",
+ deco.field_type, deco.field_name);
+ fprintf(codefile, "free((data)->%s);\n", deco.field_name);
+ fprintf(codefile, "(data)->%s = NULL;\n", deco.field_name);
+ fprintf(codefile, "}\n");
+ } else {
+ /* Decorated with required field of ASN.1 type */
+ fprintf(codefile, "free_%s(&(data)->%s);\n",
+ deco.field_type, deco.field_name);
+ }
+ free(deco.field_type);
+ }
+ fprintf (codefile, "}\n\n");
+}
+
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