1*0Sstevel@tonic-gate /* tasn_fre.c */ 2*0Sstevel@tonic-gate /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 3*0Sstevel@tonic-gate * project 2000. 4*0Sstevel@tonic-gate */ 5*0Sstevel@tonic-gate /* ==================================================================== 6*0Sstevel@tonic-gate * Copyright (c) 2000 The OpenSSL Project. All rights reserved. 7*0Sstevel@tonic-gate * 8*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 9*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 10*0Sstevel@tonic-gate * are met: 11*0Sstevel@tonic-gate * 12*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright 13*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 14*0Sstevel@tonic-gate * 15*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 16*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in 17*0Sstevel@tonic-gate * the documentation and/or other materials provided with the 18*0Sstevel@tonic-gate * distribution. 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this 21*0Sstevel@tonic-gate * software must display the following acknowledgment: 22*0Sstevel@tonic-gate * "This product includes software developed by the OpenSSL Project 23*0Sstevel@tonic-gate * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24*0Sstevel@tonic-gate * 25*0Sstevel@tonic-gate * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26*0Sstevel@tonic-gate * endorse or promote products derived from this software without 27*0Sstevel@tonic-gate * prior written permission. For written permission, please contact 28*0Sstevel@tonic-gate * licensing@OpenSSL.org. 29*0Sstevel@tonic-gate * 30*0Sstevel@tonic-gate * 5. Products derived from this software may not be called "OpenSSL" 31*0Sstevel@tonic-gate * nor may "OpenSSL" appear in their names without prior written 32*0Sstevel@tonic-gate * permission of the OpenSSL Project. 33*0Sstevel@tonic-gate * 34*0Sstevel@tonic-gate * 6. Redistributions of any form whatsoever must retain the following 35*0Sstevel@tonic-gate * acknowledgment: 36*0Sstevel@tonic-gate * "This product includes software developed by the OpenSSL Project 37*0Sstevel@tonic-gate * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38*0Sstevel@tonic-gate * 39*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40*0Sstevel@tonic-gate * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42*0Sstevel@tonic-gate * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43*0Sstevel@tonic-gate * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44*0Sstevel@tonic-gate * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45*0Sstevel@tonic-gate * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46*0Sstevel@tonic-gate * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48*0Sstevel@tonic-gate * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49*0Sstevel@tonic-gate * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50*0Sstevel@tonic-gate * OF THE POSSIBILITY OF SUCH DAMAGE. 51*0Sstevel@tonic-gate * ==================================================================== 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * This product includes cryptographic software written by Eric Young 54*0Sstevel@tonic-gate * (eay@cryptsoft.com). This product includes software written by Tim 55*0Sstevel@tonic-gate * Hudson (tjh@cryptsoft.com). 56*0Sstevel@tonic-gate * 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate #include <stddef.h> 61*0Sstevel@tonic-gate #include <openssl/asn1.h> 62*0Sstevel@tonic-gate #include <openssl/asn1t.h> 63*0Sstevel@tonic-gate #include <openssl/objects.h> 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine); 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate /* Free up an ASN1 structure */ 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it) 70*0Sstevel@tonic-gate { 71*0Sstevel@tonic-gate asn1_item_combine_free(&val, it, 0); 72*0Sstevel@tonic-gate } 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it) 75*0Sstevel@tonic-gate { 76*0Sstevel@tonic-gate asn1_item_combine_free(pval, it, 0); 77*0Sstevel@tonic-gate } 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine) 80*0Sstevel@tonic-gate { 81*0Sstevel@tonic-gate const ASN1_TEMPLATE *tt = NULL, *seqtt; 82*0Sstevel@tonic-gate const ASN1_EXTERN_FUNCS *ef; 83*0Sstevel@tonic-gate const ASN1_COMPAT_FUNCS *cf; 84*0Sstevel@tonic-gate const ASN1_AUX *aux = it->funcs; 85*0Sstevel@tonic-gate ASN1_aux_cb *asn1_cb; 86*0Sstevel@tonic-gate int i; 87*0Sstevel@tonic-gate if(!pval) return; 88*0Sstevel@tonic-gate if((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) return; 89*0Sstevel@tonic-gate if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb; 90*0Sstevel@tonic-gate else asn1_cb = 0; 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate switch(it->itype) { 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate case ASN1_ITYPE_PRIMITIVE: 95*0Sstevel@tonic-gate if(it->templates) ASN1_template_free(pval, it->templates); 96*0Sstevel@tonic-gate else ASN1_primitive_free(pval, it); 97*0Sstevel@tonic-gate break; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate case ASN1_ITYPE_MSTRING: 100*0Sstevel@tonic-gate ASN1_primitive_free(pval, it); 101*0Sstevel@tonic-gate break; 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate case ASN1_ITYPE_CHOICE: 104*0Sstevel@tonic-gate if(asn1_cb) { 105*0Sstevel@tonic-gate i = asn1_cb(ASN1_OP_FREE_PRE, pval, it); 106*0Sstevel@tonic-gate if(i == 2) return; 107*0Sstevel@tonic-gate } 108*0Sstevel@tonic-gate i = asn1_get_choice_selector(pval, it); 109*0Sstevel@tonic-gate if(asn1_cb) asn1_cb(ASN1_OP_FREE_PRE, pval, it); 110*0Sstevel@tonic-gate if((i >= 0) && (i < it->tcount)) { 111*0Sstevel@tonic-gate ASN1_VALUE **pchval; 112*0Sstevel@tonic-gate tt = it->templates + i; 113*0Sstevel@tonic-gate pchval = asn1_get_field_ptr(pval, tt); 114*0Sstevel@tonic-gate ASN1_template_free(pchval, tt); 115*0Sstevel@tonic-gate } 116*0Sstevel@tonic-gate if(asn1_cb) asn1_cb(ASN1_OP_FREE_POST, pval, it); 117*0Sstevel@tonic-gate if(!combine) { 118*0Sstevel@tonic-gate OPENSSL_free(*pval); 119*0Sstevel@tonic-gate *pval = NULL; 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate break; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate case ASN1_ITYPE_COMPAT: 124*0Sstevel@tonic-gate cf = it->funcs; 125*0Sstevel@tonic-gate if(cf && cf->asn1_free) cf->asn1_free(*pval); 126*0Sstevel@tonic-gate break; 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate case ASN1_ITYPE_EXTERN: 129*0Sstevel@tonic-gate ef = it->funcs; 130*0Sstevel@tonic-gate if(ef && ef->asn1_ex_free) ef->asn1_ex_free(pval, it); 131*0Sstevel@tonic-gate break; 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate case ASN1_ITYPE_SEQUENCE: 134*0Sstevel@tonic-gate if(asn1_do_lock(pval, -1, it) > 0) return; 135*0Sstevel@tonic-gate if(asn1_cb) { 136*0Sstevel@tonic-gate i = asn1_cb(ASN1_OP_FREE_PRE, pval, it); 137*0Sstevel@tonic-gate if(i == 2) return; 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate asn1_enc_free(pval, it); 140*0Sstevel@tonic-gate /* If we free up as normal we will invalidate any 141*0Sstevel@tonic-gate * ANY DEFINED BY field and we wont be able to 142*0Sstevel@tonic-gate * determine the type of the field it defines. So 143*0Sstevel@tonic-gate * free up in reverse order. 144*0Sstevel@tonic-gate */ 145*0Sstevel@tonic-gate tt = it->templates + it->tcount - 1; 146*0Sstevel@tonic-gate for(i = 0; i < it->tcount; tt--, i++) { 147*0Sstevel@tonic-gate ASN1_VALUE **pseqval; 148*0Sstevel@tonic-gate seqtt = asn1_do_adb(pval, tt, 0); 149*0Sstevel@tonic-gate if(!seqtt) continue; 150*0Sstevel@tonic-gate pseqval = asn1_get_field_ptr(pval, seqtt); 151*0Sstevel@tonic-gate ASN1_template_free(pseqval, seqtt); 152*0Sstevel@tonic-gate } 153*0Sstevel@tonic-gate if(asn1_cb) asn1_cb(ASN1_OP_FREE_POST, pval, it); 154*0Sstevel@tonic-gate if(!combine) { 155*0Sstevel@tonic-gate OPENSSL_free(*pval); 156*0Sstevel@tonic-gate *pval = NULL; 157*0Sstevel@tonic-gate } 158*0Sstevel@tonic-gate break; 159*0Sstevel@tonic-gate } 160*0Sstevel@tonic-gate } 161*0Sstevel@tonic-gate 162*0Sstevel@tonic-gate void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 163*0Sstevel@tonic-gate { 164*0Sstevel@tonic-gate int i; 165*0Sstevel@tonic-gate if(tt->flags & ASN1_TFLG_SK_MASK) { 166*0Sstevel@tonic-gate STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval; 167*0Sstevel@tonic-gate for(i = 0; i < sk_ASN1_VALUE_num(sk); i++) { 168*0Sstevel@tonic-gate ASN1_VALUE *vtmp; 169*0Sstevel@tonic-gate vtmp = sk_ASN1_VALUE_value(sk, i); 170*0Sstevel@tonic-gate asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0); 171*0Sstevel@tonic-gate } 172*0Sstevel@tonic-gate sk_ASN1_VALUE_free(sk); 173*0Sstevel@tonic-gate *pval = NULL; 174*0Sstevel@tonic-gate } else asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item), 175*0Sstevel@tonic-gate tt->flags & ASN1_TFLG_COMBINE); 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate 178*0Sstevel@tonic-gate void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it) 179*0Sstevel@tonic-gate { 180*0Sstevel@tonic-gate int utype; 181*0Sstevel@tonic-gate if(it) { 182*0Sstevel@tonic-gate const ASN1_PRIMITIVE_FUNCS *pf; 183*0Sstevel@tonic-gate pf = it->funcs; 184*0Sstevel@tonic-gate if(pf && pf->prim_free) { 185*0Sstevel@tonic-gate pf->prim_free(pval, it); 186*0Sstevel@tonic-gate return; 187*0Sstevel@tonic-gate } 188*0Sstevel@tonic-gate } 189*0Sstevel@tonic-gate /* Special case: if 'it' is NULL free contents of ASN1_TYPE */ 190*0Sstevel@tonic-gate if(!it) { 191*0Sstevel@tonic-gate ASN1_TYPE *typ = (ASN1_TYPE *)*pval; 192*0Sstevel@tonic-gate utype = typ->type; 193*0Sstevel@tonic-gate pval = (ASN1_VALUE **)&typ->value.ptr; 194*0Sstevel@tonic-gate if(!*pval) return; 195*0Sstevel@tonic-gate } else if(it->itype == ASN1_ITYPE_MSTRING) { 196*0Sstevel@tonic-gate utype = -1; 197*0Sstevel@tonic-gate if(!*pval) return; 198*0Sstevel@tonic-gate } else { 199*0Sstevel@tonic-gate utype = it->utype; 200*0Sstevel@tonic-gate if((utype != V_ASN1_BOOLEAN) && !*pval) return; 201*0Sstevel@tonic-gate } 202*0Sstevel@tonic-gate 203*0Sstevel@tonic-gate switch(utype) { 204*0Sstevel@tonic-gate case V_ASN1_OBJECT: 205*0Sstevel@tonic-gate ASN1_OBJECT_free((ASN1_OBJECT *)*pval); 206*0Sstevel@tonic-gate break; 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate case V_ASN1_BOOLEAN: 209*0Sstevel@tonic-gate if (it) 210*0Sstevel@tonic-gate *(ASN1_BOOLEAN *)pval = it->size; 211*0Sstevel@tonic-gate else 212*0Sstevel@tonic-gate *(ASN1_BOOLEAN *)pval = -1; 213*0Sstevel@tonic-gate return; 214*0Sstevel@tonic-gate 215*0Sstevel@tonic-gate case V_ASN1_NULL: 216*0Sstevel@tonic-gate break; 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate case V_ASN1_ANY: 219*0Sstevel@tonic-gate ASN1_primitive_free(pval, NULL); 220*0Sstevel@tonic-gate OPENSSL_free(*pval); 221*0Sstevel@tonic-gate break; 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate default: 224*0Sstevel@tonic-gate ASN1_STRING_free((ASN1_STRING *)*pval); 225*0Sstevel@tonic-gate *pval = NULL; 226*0Sstevel@tonic-gate break; 227*0Sstevel@tonic-gate } 228*0Sstevel@tonic-gate *pval = NULL; 229*0Sstevel@tonic-gate } 230