1*0Sstevel@tonic-gate /* tasn_utl.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 <string.h> 62*0Sstevel@tonic-gate #include <openssl/asn1.h> 63*0Sstevel@tonic-gate #include <openssl/asn1t.h> 64*0Sstevel@tonic-gate #include <openssl/objects.h> 65*0Sstevel@tonic-gate #include <openssl/err.h> 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate /* Utility functions for manipulating fields and offsets */ 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate /* Add 'offset' to 'addr' */ 70*0Sstevel@tonic-gate #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset) 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate /* Given an ASN1_ITEM CHOICE type return 73*0Sstevel@tonic-gate * the selector value 74*0Sstevel@tonic-gate */ 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) 77*0Sstevel@tonic-gate { 78*0Sstevel@tonic-gate int *sel = offset2ptr(*pval, it->utype); 79*0Sstevel@tonic-gate return *sel; 80*0Sstevel@tonic-gate } 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate /* Given an ASN1_ITEM CHOICE type set 83*0Sstevel@tonic-gate * the selector value, return old value. 84*0Sstevel@tonic-gate */ 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it) 87*0Sstevel@tonic-gate { 88*0Sstevel@tonic-gate int *sel, ret; 89*0Sstevel@tonic-gate sel = offset2ptr(*pval, it->utype); 90*0Sstevel@tonic-gate ret = *sel; 91*0Sstevel@tonic-gate *sel = value; 92*0Sstevel@tonic-gate return ret; 93*0Sstevel@tonic-gate } 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate /* Do reference counting. The value 'op' decides what to do. 96*0Sstevel@tonic-gate * if it is +1 then the count is incremented. If op is 0 count is 97*0Sstevel@tonic-gate * set to 1. If op is -1 count is decremented and the return value 98*0Sstevel@tonic-gate * is the current refrence count or 0 if no reference count exists. 99*0Sstevel@tonic-gate */ 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) 102*0Sstevel@tonic-gate { 103*0Sstevel@tonic-gate const ASN1_AUX *aux; 104*0Sstevel@tonic-gate int *lck, ret; 105*0Sstevel@tonic-gate if(it->itype != ASN1_ITYPE_SEQUENCE) return 0; 106*0Sstevel@tonic-gate aux = it->funcs; 107*0Sstevel@tonic-gate if(!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) return 0; 108*0Sstevel@tonic-gate lck = offset2ptr(*pval, aux->ref_offset); 109*0Sstevel@tonic-gate if(op == 0) { 110*0Sstevel@tonic-gate *lck = 1; 111*0Sstevel@tonic-gate return 1; 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate ret = CRYPTO_add(lck, op, aux->ref_lock); 114*0Sstevel@tonic-gate #ifdef REF_PRINT 115*0Sstevel@tonic-gate fprintf(stderr, "%s: Reference Count: %d\n", it->sname, *lck); 116*0Sstevel@tonic-gate #endif 117*0Sstevel@tonic-gate #ifdef REF_CHECK 118*0Sstevel@tonic-gate if(ret < 0) 119*0Sstevel@tonic-gate fprintf(stderr, "%s, bad reference count\n", it->sname); 120*0Sstevel@tonic-gate #endif 121*0Sstevel@tonic-gate return ret; 122*0Sstevel@tonic-gate } 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) 125*0Sstevel@tonic-gate { 126*0Sstevel@tonic-gate const ASN1_AUX *aux; 127*0Sstevel@tonic-gate if(!pval || !*pval) return NULL; 128*0Sstevel@tonic-gate aux = it->funcs; 129*0Sstevel@tonic-gate if(!aux || !(aux->flags & ASN1_AFLG_ENCODING)) return NULL; 130*0Sstevel@tonic-gate return offset2ptr(*pval, aux->enc_offset); 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate ASN1_ENCODING *enc; 136*0Sstevel@tonic-gate enc = asn1_get_enc_ptr(pval, it); 137*0Sstevel@tonic-gate if(enc) { 138*0Sstevel@tonic-gate enc->enc = NULL; 139*0Sstevel@tonic-gate enc->len = 0; 140*0Sstevel@tonic-gate enc->modified = 1; 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate } 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate ASN1_ENCODING *enc; 147*0Sstevel@tonic-gate enc = asn1_get_enc_ptr(pval, it); 148*0Sstevel@tonic-gate if(enc) { 149*0Sstevel@tonic-gate if(enc->enc) OPENSSL_free(enc->enc); 150*0Sstevel@tonic-gate enc->enc = NULL; 151*0Sstevel@tonic-gate enc->len = 0; 152*0Sstevel@tonic-gate enc->modified = 1; 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it) 157*0Sstevel@tonic-gate { 158*0Sstevel@tonic-gate ASN1_ENCODING *enc; 159*0Sstevel@tonic-gate enc = asn1_get_enc_ptr(pval, it); 160*0Sstevel@tonic-gate if(!enc) return 1; 161*0Sstevel@tonic-gate 162*0Sstevel@tonic-gate if(enc->enc) OPENSSL_free(enc->enc); 163*0Sstevel@tonic-gate enc->enc = OPENSSL_malloc(inlen); 164*0Sstevel@tonic-gate if(!enc->enc) return 0; 165*0Sstevel@tonic-gate memcpy(enc->enc, in, inlen); 166*0Sstevel@tonic-gate enc->len = inlen; 167*0Sstevel@tonic-gate enc->modified = 0; 168*0Sstevel@tonic-gate 169*0Sstevel@tonic-gate return 1; 170*0Sstevel@tonic-gate } 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it) 173*0Sstevel@tonic-gate { 174*0Sstevel@tonic-gate ASN1_ENCODING *enc; 175*0Sstevel@tonic-gate enc = asn1_get_enc_ptr(pval, it); 176*0Sstevel@tonic-gate if(!enc || enc->modified) return 0; 177*0Sstevel@tonic-gate if(out) { 178*0Sstevel@tonic-gate memcpy(*out, enc->enc, enc->len); 179*0Sstevel@tonic-gate *out += enc->len; 180*0Sstevel@tonic-gate } 181*0Sstevel@tonic-gate if(len) *len = enc->len; 182*0Sstevel@tonic-gate return 1; 183*0Sstevel@tonic-gate } 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate /* Given an ASN1_TEMPLATE get a pointer to a field */ 186*0Sstevel@tonic-gate ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 187*0Sstevel@tonic-gate { 188*0Sstevel@tonic-gate ASN1_VALUE **pvaltmp; 189*0Sstevel@tonic-gate if(tt->flags & ASN1_TFLG_COMBINE) return pval; 190*0Sstevel@tonic-gate pvaltmp = offset2ptr(*pval, tt->offset); 191*0Sstevel@tonic-gate /* NOTE for BOOLEAN types the field is just a plain 192*0Sstevel@tonic-gate * int so we can't return int **, so settle for 193*0Sstevel@tonic-gate * (int *). 194*0Sstevel@tonic-gate */ 195*0Sstevel@tonic-gate return pvaltmp; 196*0Sstevel@tonic-gate } 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate /* Handle ANY DEFINED BY template, find the selector, look up 199*0Sstevel@tonic-gate * the relevant ASN1_TEMPLATE in the table and return it. 200*0Sstevel@tonic-gate */ 201*0Sstevel@tonic-gate 202*0Sstevel@tonic-gate const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr) 203*0Sstevel@tonic-gate { 204*0Sstevel@tonic-gate const ASN1_ADB *adb; 205*0Sstevel@tonic-gate const ASN1_ADB_TABLE *atbl; 206*0Sstevel@tonic-gate long selector; 207*0Sstevel@tonic-gate ASN1_VALUE **sfld; 208*0Sstevel@tonic-gate int i; 209*0Sstevel@tonic-gate if(!(tt->flags & ASN1_TFLG_ADB_MASK)) return tt; 210*0Sstevel@tonic-gate 211*0Sstevel@tonic-gate /* Else ANY DEFINED BY ... get the table */ 212*0Sstevel@tonic-gate adb = ASN1_ADB_ptr(tt->item); 213*0Sstevel@tonic-gate 214*0Sstevel@tonic-gate /* Get the selector field */ 215*0Sstevel@tonic-gate sfld = offset2ptr(*pval, adb->offset); 216*0Sstevel@tonic-gate 217*0Sstevel@tonic-gate /* Check if NULL */ 218*0Sstevel@tonic-gate if(!sfld) { 219*0Sstevel@tonic-gate if(!adb->null_tt) goto err; 220*0Sstevel@tonic-gate return adb->null_tt; 221*0Sstevel@tonic-gate } 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate /* Convert type to a long: 224*0Sstevel@tonic-gate * NB: don't check for NID_undef here because it 225*0Sstevel@tonic-gate * might be a legitimate value in the table 226*0Sstevel@tonic-gate */ 227*0Sstevel@tonic-gate if(tt->flags & ASN1_TFLG_ADB_OID) 228*0Sstevel@tonic-gate selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); 229*0Sstevel@tonic-gate else 230*0Sstevel@tonic-gate selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); 231*0Sstevel@tonic-gate 232*0Sstevel@tonic-gate /* Try to find matching entry in table 233*0Sstevel@tonic-gate * Maybe should check application types first to 234*0Sstevel@tonic-gate * allow application override? Might also be useful 235*0Sstevel@tonic-gate * to have a flag which indicates table is sorted and 236*0Sstevel@tonic-gate * we can do a binary search. For now stick to a 237*0Sstevel@tonic-gate * linear search. 238*0Sstevel@tonic-gate */ 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate for(atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) 241*0Sstevel@tonic-gate if(atbl->value == selector) return &atbl->tt; 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate /* FIXME: need to search application table too */ 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate /* No match, return default type */ 246*0Sstevel@tonic-gate if(!adb->default_tt) goto err; 247*0Sstevel@tonic-gate return adb->default_tt; 248*0Sstevel@tonic-gate 249*0Sstevel@tonic-gate err: 250*0Sstevel@tonic-gate /* FIXME: should log the value or OID of unsupported type */ 251*0Sstevel@tonic-gate if(nullerr) ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); 252*0Sstevel@tonic-gate return NULL; 253*0Sstevel@tonic-gate } 254