/* $OpenBSD: tasn_new.c,v 1.22 2022/05/10 05:19:22 jsing Exp $ */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 2000. */ /* ==================================================================== * Copyright (c) 2000-2004 The OpenSSL Project. All rights reserved. * * 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 above 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 acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include #include #include #include #include #include #include "asn1_locl.h" static int asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it); static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); ASN1_VALUE * ASN1_item_new(const ASN1_ITEM *it) { ASN1_VALUE *ret = NULL; if (ASN1_item_ex_new(&ret, it) > 0) return ret; return NULL; } /* Allocate an ASN1 structure */ int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) { return asn1_item_ex_new(pval, it); } static int asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) { const ASN1_TEMPLATE *tt = NULL; const ASN1_EXTERN_FUNCS *ef; const ASN1_AUX *aux = it->funcs; ASN1_aux_cb *asn1_cb = NULL; ASN1_VALUE **pseqval; int i; if (aux != NULL && aux->asn1_cb != NULL) asn1_cb = aux->asn1_cb; *pval = NULL; switch (it->itype) { case ASN1_ITYPE_EXTERN: ef = it->funcs; if (ef && ef->asn1_ex_new) { if (!ef->asn1_ex_new(pval, it)) goto memerr; } break; case ASN1_ITYPE_PRIMITIVE: if (it->templates) { if (!ASN1_template_new(pval, it->templates)) goto memerr; } else if (!ASN1_primitive_new(pval, it)) goto memerr; break; case ASN1_ITYPE_MSTRING: if (!ASN1_primitive_new(pval, it)) goto memerr; break; case ASN1_ITYPE_CHOICE: if (asn1_cb) { i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); if (!i) goto auxerr; if (i == 2) { return 1; } } *pval = calloc(1, it->size); if (!*pval) goto memerr; asn1_set_choice_selector(pval, -1, it); if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) goto auxerr; break; case ASN1_ITYPE_NDEF_SEQUENCE: case ASN1_ITYPE_SEQUENCE: if (asn1_cb) { i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); if (!i) goto auxerr; if (i == 2) { return 1; } } *pval = calloc(1, it->size); if (!*pval) goto memerr; asn1_do_lock(pval, 0, it); asn1_enc_init(pval, it); for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) { pseqval = asn1_get_field_ptr(pval, tt); if (!ASN1_template_new(pseqval, tt)) goto memerr; } if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) goto auxerr; break; } return 1; memerr: ASN1error(ERR_R_MALLOC_FAILURE); return 0; auxerr: ASN1error(ASN1_R_AUX_ERROR); ASN1_item_ex_free(pval, it); return 0; } static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) { const ASN1_EXTERN_FUNCS *ef; switch (it->itype) { case ASN1_ITYPE_EXTERN: ef = it->funcs; if (ef && ef->asn1_ex_clear) ef->asn1_ex_clear(pval, it); else *pval = NULL; break; case ASN1_ITYPE_PRIMITIVE: if (it->templates) asn1_template_clear(pval, it->templates); else asn1_primitive_clear(pval, it); break; case ASN1_ITYPE_MSTRING: asn1_primitive_clear(pval, it); break; case ASN1_ITYPE_CHOICE: case ASN1_ITYPE_SEQUENCE: case ASN1_ITYPE_NDEF_SEQUENCE: *pval = NULL; break; } } int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) { const ASN1_ITEM *it = tt->item; int ret; if (tt->flags & ASN1_TFLG_OPTIONAL) { asn1_template_clear(pval, tt); return 1; } /* If ANY DEFINED BY nothing to do */ if (tt->flags & ASN1_TFLG_ADB_MASK) { *pval = NULL; return 1; } /* If SET OF or SEQUENCE OF, its a STACK */ if (tt->flags & ASN1_TFLG_SK_MASK) { STACK_OF(ASN1_VALUE) *skval; skval = sk_ASN1_VALUE_new_null(); if (!skval) { ASN1error(ERR_R_MALLOC_FAILURE); ret = 0; goto done; } *pval = (ASN1_VALUE *)skval; ret = 1; goto done; } /* Otherwise pass it back to the item routine */ ret = asn1_item_ex_new(pval, it); done: return ret; } static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) { /* If ADB or STACK just NULL the field */ if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK)) *pval = NULL; else asn1_item_clear(pval, tt->item); } /* NB: could probably combine most of the real XXX_new() behaviour and junk * all the old functions. */ int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) { ASN1_TYPE *typ; ASN1_STRING *str; int utype; if (it != NULL && it->funcs != NULL) { const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; if (pf->prim_new == NULL) return 0; return pf->prim_new(pval, it); } if (!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = V_ASN1_UNDEF; else utype = it->utype; switch (utype) { case V_ASN1_OBJECT: *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); return 1; case V_ASN1_BOOLEAN: *(ASN1_BOOLEAN *)pval = it->size; return 1; case V_ASN1_NULL: *pval = (ASN1_VALUE *)1; return 1; case V_ASN1_ANY: typ = malloc(sizeof(ASN1_TYPE)); if (typ != NULL) { typ->value.ptr = NULL; typ->type = V_ASN1_UNDEF; } *pval = (ASN1_VALUE *)typ; break; default: str = ASN1_STRING_type_new(utype); if (it != NULL && it->itype == ASN1_ITYPE_MSTRING && str != NULL) str->flags |= ASN1_STRING_FLAG_MSTRING; *pval = (ASN1_VALUE *)str; break; } if (*pval) return 1; return 0; } static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) { int utype; if (it != NULL && it->funcs != NULL) { const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; if (pf->prim_clear) pf->prim_clear(pval, it); else *pval = NULL; return; } if (!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = V_ASN1_UNDEF; else utype = it->utype; if (utype == V_ASN1_BOOLEAN) *(ASN1_BOOLEAN *)pval = it->size; else *pval = NULL; }