xref: /freebsd/crypto/heimdal/lib/asn1/gen_free.c (revision a03411e84728e9b267056fd31c7d1d9d1dc1b01e)
1 /*
2  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  *
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.
16  *
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.
20  *
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
31  * SUCH DAMAGE.
32  */
33 
34 #include "gen_locl.h"
35 
36 RCSID("$Id$");
37 
38 static void
39 free_primitive (const char *typename, const char *name)
40 {
41     fprintf (codefile, "der_free_%s(%s);\n", typename, name);
42 }
43 
44 static void
45 free_type (const char *name, const Type *t, int preserve)
46 {
47     switch (t->type) {
48     case TType:
49 #if 0
50 	free_type (name, t->symbol->type, preserve);
51 #endif
52 	fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
53 	break;
54     case TInteger:
55 	if (t->range == NULL && t->members == NULL) {
56 	    free_primitive ("heim_integer", name);
57 	    break;
58 	}
59     case TBoolean:
60     case TEnumerated :
61     case TNull:
62     case TGeneralizedTime:
63     case TUTCTime:
64 	break;
65     case TBitString:
66 	if (ASN1_TAILQ_EMPTY(t->members))
67 	    free_primitive("bit_string", name);
68 	break;
69     case TOctetString:
70 	free_primitive ("octet_string", name);
71 	break;
72     case TChoice:
73     case TSet:
74     case TSequence: {
75 	Member *m, *have_ellipsis = NULL;
76 
77 	if (t->members == NULL)
78 	    break;
79 
80 	if ((t->type == TSequence || t->type == TChoice) && preserve)
81 	    fprintf(codefile, "der_free_octet_string(&data->_save);\n");
82 
83 	if(t->type == TChoice)
84 	    fprintf(codefile, "switch((%s)->element) {\n", name);
85 
86 	ASN1_TAILQ_FOREACH(m, t->members, members) {
87 	    char *s;
88 
89 	    if (m->ellipsis){
90 		have_ellipsis = m;
91 		continue;
92 	    }
93 
94 	    if(t->type == TChoice)
95 		fprintf(codefile, "case %s:\n", m->label);
96 	    if (asprintf (&s, "%s(%s)->%s%s",
97 			  m->optional ? "" : "&", name,
98 			  t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
99 		errx(1, "malloc");
100 	    if(m->optional)
101 		fprintf(codefile, "if(%s) {\n", s);
102 	    free_type (s, m->type, FALSE);
103 	    if(m->optional)
104 		fprintf(codefile,
105 			"free(%s);\n"
106 			"%s = NULL;\n"
107 			"}\n",s, s);
108 	    free (s);
109 	    if(t->type == TChoice)
110 		fprintf(codefile, "break;\n");
111 	}
112 
113 	if(t->type == TChoice) {
114 	    if (have_ellipsis)
115 		fprintf(codefile,
116 			"case %s:\n"
117 			"der_free_octet_string(&(%s)->u.%s);\n"
118 			"break;",
119 			have_ellipsis->label,
120 			name, have_ellipsis->gen_name);
121 	    fprintf(codefile, "}\n");
122 	}
123 	break;
124     }
125     case TSetOf:
126     case TSequenceOf: {
127 	char *n;
128 
129 	fprintf (codefile, "while((%s)->len){\n", name);
130 	if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
131 	    errx(1, "malloc");
132 	free_type(n, t->subtype, FALSE);
133 	fprintf(codefile,
134 		"(%s)->len--;\n"
135 		"}\n",
136 		name);
137 	fprintf(codefile,
138 		"free((%s)->val);\n"
139 		"(%s)->val = NULL;\n", name, name);
140 	free(n);
141 	break;
142     }
143     case TGeneralString:
144 	free_primitive ("general_string", name);
145 	break;
146     case TTeletexString:
147 	free_primitive ("general_string", name);
148 	break;
149     case TUTF8String:
150 	free_primitive ("utf8string", name);
151 	break;
152     case TPrintableString:
153 	free_primitive ("printable_string", name);
154 	break;
155     case TIA5String:
156 	free_primitive ("ia5_string", name);
157 	break;
158     case TBMPString:
159 	free_primitive ("bmp_string", name);
160 	break;
161     case TUniversalString:
162 	free_primitive ("universal_string", name);
163 	break;
164     case TVisibleString:
165 	free_primitive ("visible_string", name);
166 	break;
167     case TTag:
168 	free_type (name, t->subtype, preserve);
169 	break;
170     case TOID :
171 	free_primitive ("oid", name);
172 	break;
173     default :
174 	abort ();
175     }
176 }
177 
178 void
179 generate_type_free (const Symbol *s)
180 {
181     int preserve = preserve_type(s->name) ? TRUE : FALSE;
182 
183     fprintf (codefile, "void ASN1CALL\n"
184 	     "free_%s(%s *data)\n"
185 	     "{\n",
186 	     s->gen_name, s->gen_name);
187 
188     free_type ("data", s->type, preserve);
189     fprintf (codefile, "}\n\n");
190 }
191 
192