Home | History | Annotate | Download | only in sequence 
      1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
      2  *
      3  * LibTomCrypt is a library that provides various cryptographic
      4  * algorithms in a highly modular and flexible manner.
      5  *
      6  * The library is free for all purposes without any express
      7  * guarantee it works.
      8  *
      9  * Tom St Denis, tomstdenis (at) gmail.com, http://libtomcrypt.com
     10  */
     11 #include "tomcrypt.h"
     12 
     13 /**
     14   @file der_sequence_free.c
     15   ASN.1 DER, free's a structure allocated by der_decode_sequence_flexi(), Tom St Denis
     16 */
     17 
     18 #ifdef LTC_DER
     19 
     20 /**
     21   Free memory allocated by der_decode_sequence_flexi()
     22   @param in     The list to free
     23 */
     24 void der_sequence_free(ltc_asn1_list *in)
     25 {
     26    ltc_asn1_list *l;
     27 
     28    /* walk to the start of the chain */
     29    while (in->prev != NULL || in->parent != NULL) {
     30       if (in->parent != NULL) {
     31           in = in->parent;
     32       } else {
     33           in = in->prev;
     34       }
     35    }
     36 
     37    /* now walk the list and free stuff */
     38    while (in != NULL) {
     39       /* is there a child? */
     40       if (in->child) {
     41          /* disconnect */
     42          in->child->parent = NULL;
     43          der_sequence_free(in->child);
     44       }
     45 
     46       switch (in->type) {
     47          case LTC_ASN1_SET:
     48          case LTC_ASN1_SETOF:
     49          case LTC_ASN1_SEQUENCE: break;
     50          case LTC_ASN1_INTEGER : if (in->data != NULL) { mp_clear(in->data); } break;
     51          default               : if (in->data != NULL) { XFREE(in->data);    }
     52       }
     53 
     54       /* move to next and free current */
     55       l = in->next;
     56       free(in);
     57       in = l;
     58    }
     59 }
     60 
     61 #endif
     62 
     63 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/sequence/der_sequence_free.c,v $ */
     64 /* $Revision: 1.3 $ */
     65 /* $Date: 2006/03/31 14:15:35 $ */
     66