1 // SPDX-License-Identifier: BSD-2-Clause
2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3  *
4  * LibTomCrypt is a library that provides various cryptographic
5  * algorithms in a highly modular and flexible manner.
6  *
7  * The library is free for all purposes without any express
8  * guarantee it works.
9  */
10 #include "tomcrypt_private.h"
11 
12 /**
13   @file der_sequence_shrink.c
14   Free memory allocated for CONSTRUCTED, SET or SEQUENCE elements by der_decode_sequence_flexi(), Steffen Jaeckel
15 */
16 
17 #ifdef LTC_DER
18 
19 /**
20   Free memory allocated for CONSTRUCTED,
21   SET or SEQUENCE elements by der_decode_sequence_flexi()
22   @param in     The list to shrink
23 */
der_sequence_shrink(ltc_asn1_list * in)24 void der_sequence_shrink(ltc_asn1_list *in)
25 {
26    if (!in) return;
27 
28    /* now walk the list and free stuff */
29    while (in != NULL) {
30       /* is there a child? */
31       if (in->child) {
32          der_sequence_shrink(in->child);
33       }
34 
35       switch (in->type) {
36          case LTC_ASN1_CUSTOM_TYPE:
37          case LTC_ASN1_SET:
38          case LTC_ASN1_SEQUENCE : if (in->data != NULL) { XFREE(in->data); in->data = NULL; } break;
39          default: break;
40       }
41 
42       /* move to next and free current */
43       in = in->next;
44    }
45 }
46 
47 #endif
48 
49 /* ref:         $Format:%D$ */
50 /* git commit:  $Format:%H$ */
51 /* commit time: $Format:%ai$ */
52