/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <openssl_grpc/asn1.h> #include <assert.h> #include <openssl_grpc/asn1t.h> #include <openssl_grpc/mem.h> #include "internal.h" /* Free up an ASN1 structure */ void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it) { asn1_item_combine_free(&val, it, 0); } void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it) { asn1_item_combine_free(pval, it, 0); } void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine) { const ASN1_TEMPLATE *tt = NULL, *seqtt; const ASN1_EXTERN_FUNCS *ef; int i; if (!pval) return; if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) return; switch (it->itype) { case ASN1_ITYPE_PRIMITIVE: if (it->templates) ASN1_template_free(pval, it->templates); else ASN1_primitive_free(pval, it); break; case ASN1_ITYPE_MSTRING: ASN1_primitive_free(pval, it); break; case ASN1_ITYPE_CHOICE: { const ASN1_AUX *aux = it->funcs; ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL; if (asn1_cb) { i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL); if (i == 2) return; } i = asn1_get_choice_selector(pval, it); if ((i >= 0) && (i < it->tcount)) { ASN1_VALUE **pchval; tt = it->templates + i; pchval = asn1_get_field_ptr(pval, tt); ASN1_template_free(pchval, tt); } if (asn1_cb) asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL); if (!combine) { OPENSSL_free(*pval); *pval = NULL; } break; } case ASN1_ITYPE_EXTERN: ef = it->funcs; if (ef && ef->asn1_ex_free) ef->asn1_ex_free(pval, it); break; case ASN1_ITYPE_SEQUENCE: { if (!asn1_refcount_dec_and_test_zero(pval, it)) return; const ASN1_AUX *aux = it->funcs; ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL; if (asn1_cb) { i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL); if (i == 2) return; } asn1_enc_free(pval, it); /* * If we free up as normal we will invalidate any ANY DEFINED BY * field and we wont be able to determine the type of the field it * defines. So free up in reverse order. */ tt = it->templates + it->tcount - 1; for (i = 0; i < it->tcount; tt--, i++) { ASN1_VALUE **pseqval; seqtt = asn1_do_adb(pval, tt, 0); if (!seqtt) continue; pseqval = asn1_get_field_ptr(pval, seqtt); ASN1_template_free(pseqval, seqtt); } if (asn1_cb) asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL); if (!combine) { OPENSSL_free(*pval); *pval = NULL; } break; } } } void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) { size_t i; if (tt->flags & ASN1_TFLG_SK_MASK) { STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval; for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) { ASN1_VALUE *vtmp; vtmp = sk_ASN1_VALUE_value(sk, i); asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0); } sk_ASN1_VALUE_free(sk); *pval = NULL; } else asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item), tt->flags & ASN1_TFLG_COMBINE); } void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it) { int utype; /* Historically, |it->funcs| for primitive types contained an * |ASN1_PRIMITIVE_FUNCS| table of calbacks. */ assert(it == NULL || it->funcs == NULL); /* Special case: if 'it' is NULL free contents of ASN1_TYPE */ if (!it) { ASN1_TYPE *typ = (ASN1_TYPE *)*pval; utype = typ->type; pval = &typ->value.asn1_value; if (utype != V_ASN1_BOOLEAN && !*pval) return; } else if (it->itype == ASN1_ITYPE_MSTRING) { utype = -1; if (!*pval) return; } else { utype = it->utype; if ((utype != V_ASN1_BOOLEAN) && !*pval) return; } switch (utype) { case V_ASN1_OBJECT: ASN1_OBJECT_free((ASN1_OBJECT *)*pval); break; case V_ASN1_BOOLEAN: if (it) *(ASN1_BOOLEAN *)pval = it->size; else *(ASN1_BOOLEAN *)pval = -1; return; case V_ASN1_NULL: break; case V_ASN1_ANY: ASN1_primitive_free(pval, NULL); OPENSSL_free(*pval); break; default: ASN1_STRING_free((ASN1_STRING *)*pval); *pval = NULL; break; } *pval = NULL; }