1*0Sstevel@tonic-gate /* tasn_dec.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/buffer.h> 66*0Sstevel@tonic-gate #include <openssl/err.h> 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate static int asn1_check_eoc(unsigned char **in, long len); 69*0Sstevel@tonic-gate static int asn1_collect(BUF_MEM *buf, unsigned char **in, long len, char inf, int tag, int aclass); 70*0Sstevel@tonic-gate static int collect_data(BUF_MEM *buf, unsigned char **p, long plen); 71*0Sstevel@tonic-gate static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass, char *inf, char *cst, 72*0Sstevel@tonic-gate unsigned char **in, long len, int exptag, int expclass, char opt, ASN1_TLC *ctx); 73*0Sstevel@tonic-gate static int asn1_template_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx); 74*0Sstevel@tonic-gate static int asn1_template_noexp_d2i(ASN1_VALUE **val, unsigned char **in, long len, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx); 75*0Sstevel@tonic-gate static int asn1_d2i_ex_primitive(ASN1_VALUE **pval, unsigned char **in, long len, 76*0Sstevel@tonic-gate const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx); 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* Table to convert tags to bit values, used for MSTRING type */ 79*0Sstevel@tonic-gate static unsigned long tag2bit[32]={ 80*0Sstevel@tonic-gate 0, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */ 81*0Sstevel@tonic-gate B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,/* tags 4- 7 */ 82*0Sstevel@tonic-gate B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags 8-11 */ 83*0Sstevel@tonic-gate B_ASN1_UTF8STRING,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,/* tags 12-15 */ 84*0Sstevel@tonic-gate 0, 0, B_ASN1_NUMERICSTRING,B_ASN1_PRINTABLESTRING, /* tags 16-19 */ 85*0Sstevel@tonic-gate B_ASN1_T61STRING,B_ASN1_VIDEOTEXSTRING,B_ASN1_IA5STRING, /* tags 20-22 */ 86*0Sstevel@tonic-gate B_ASN1_UTCTIME, B_ASN1_GENERALIZEDTIME, /* tags 23-24 */ 87*0Sstevel@tonic-gate B_ASN1_GRAPHICSTRING,B_ASN1_ISO64STRING,B_ASN1_GENERALSTRING, /* tags 25-27 */ 88*0Sstevel@tonic-gate B_ASN1_UNIVERSALSTRING,B_ASN1_UNKNOWN,B_ASN1_BMPSTRING,B_ASN1_UNKNOWN, /* tags 28-31 */ 89*0Sstevel@tonic-gate }; 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate unsigned long ASN1_tag2bit(int tag) 92*0Sstevel@tonic-gate { 93*0Sstevel@tonic-gate if((tag < 0) || (tag > 30)) return 0; 94*0Sstevel@tonic-gate return tag2bit[tag]; 95*0Sstevel@tonic-gate } 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate /* Macro to initialize and invalidate the cache */ 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate #define asn1_tlc_clear(c) if(c) (c)->valid = 0 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate /* Decode an ASN1 item, this currently behaves just 102*0Sstevel@tonic-gate * like a standard 'd2i' function. 'in' points to 103*0Sstevel@tonic-gate * a buffer to read the data from, in future we will 104*0Sstevel@tonic-gate * have more advanced versions that can input data 105*0Sstevel@tonic-gate * a piece at a time and this will simply be a special 106*0Sstevel@tonic-gate * case. 107*0Sstevel@tonic-gate */ 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate ASN1_VALUE *ASN1_item_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it) 110*0Sstevel@tonic-gate { 111*0Sstevel@tonic-gate ASN1_TLC c; 112*0Sstevel@tonic-gate ASN1_VALUE *ptmpval = NULL; 113*0Sstevel@tonic-gate if(!pval) pval = &ptmpval; 114*0Sstevel@tonic-gate asn1_tlc_clear(&c); 115*0Sstevel@tonic-gate if(ASN1_item_ex_d2i(pval, in, len, it, -1, 0, 0, &c) > 0) 116*0Sstevel@tonic-gate return *pval; 117*0Sstevel@tonic-gate return NULL; 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt) 121*0Sstevel@tonic-gate { 122*0Sstevel@tonic-gate ASN1_TLC c; 123*0Sstevel@tonic-gate asn1_tlc_clear(&c); 124*0Sstevel@tonic-gate return asn1_template_ex_d2i(pval, in, len, tt, 0, &c); 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate /* Decode an item, taking care of IMPLICIT tagging, if any. 129*0Sstevel@tonic-gate * If 'opt' set and tag mismatch return -1 to handle OPTIONAL 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it, 133*0Sstevel@tonic-gate int tag, int aclass, char opt, ASN1_TLC *ctx) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate const ASN1_TEMPLATE *tt, *errtt = NULL; 136*0Sstevel@tonic-gate const ASN1_COMPAT_FUNCS *cf; 137*0Sstevel@tonic-gate const ASN1_EXTERN_FUNCS *ef; 138*0Sstevel@tonic-gate const ASN1_AUX *aux = it->funcs; 139*0Sstevel@tonic-gate ASN1_aux_cb *asn1_cb; 140*0Sstevel@tonic-gate unsigned char *p, *q, imphack = 0, oclass; 141*0Sstevel@tonic-gate char seq_eoc, seq_nolen, cst, isopt; 142*0Sstevel@tonic-gate long tmplen; 143*0Sstevel@tonic-gate int i; 144*0Sstevel@tonic-gate int otag; 145*0Sstevel@tonic-gate int ret = 0; 146*0Sstevel@tonic-gate ASN1_VALUE *pchval, **pchptr, *ptmpval; 147*0Sstevel@tonic-gate if(!pval) return 0; 148*0Sstevel@tonic-gate if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb; 149*0Sstevel@tonic-gate else asn1_cb = 0; 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate switch(it->itype) { 152*0Sstevel@tonic-gate 153*0Sstevel@tonic-gate case ASN1_ITYPE_PRIMITIVE: 154*0Sstevel@tonic-gate if(it->templates) { 155*0Sstevel@tonic-gate /* tagging or OPTIONAL is currently illegal on an item template 156*0Sstevel@tonic-gate * because the flags can't get passed down. In practice this isn't 157*0Sstevel@tonic-gate * a problem: we include the relevant flags from the item template 158*0Sstevel@tonic-gate * in the template itself. 159*0Sstevel@tonic-gate */ 160*0Sstevel@tonic-gate if ((tag != -1) || opt) { 161*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE); 162*0Sstevel@tonic-gate goto err; 163*0Sstevel@tonic-gate } 164*0Sstevel@tonic-gate return asn1_template_ex_d2i(pval, in, len, it->templates, opt, ctx); 165*0Sstevel@tonic-gate } 166*0Sstevel@tonic-gate return asn1_d2i_ex_primitive(pval, in, len, it, tag, aclass, opt, ctx); 167*0Sstevel@tonic-gate break; 168*0Sstevel@tonic-gate 169*0Sstevel@tonic-gate case ASN1_ITYPE_MSTRING: 170*0Sstevel@tonic-gate p = *in; 171*0Sstevel@tonic-gate /* Just read in tag and class */ 172*0Sstevel@tonic-gate ret = asn1_check_tlen(NULL, &otag, &oclass, NULL, NULL, &p, len, -1, 0, 1, ctx); 173*0Sstevel@tonic-gate if(!ret) { 174*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 175*0Sstevel@tonic-gate goto err; 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate /* Must be UNIVERSAL class */ 178*0Sstevel@tonic-gate if(oclass != V_ASN1_UNIVERSAL) { 179*0Sstevel@tonic-gate /* If OPTIONAL, assume this is OK */ 180*0Sstevel@tonic-gate if(opt) return -1; 181*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_NOT_UNIVERSAL); 182*0Sstevel@tonic-gate goto err; 183*0Sstevel@tonic-gate } 184*0Sstevel@tonic-gate /* Check tag matches bit map */ 185*0Sstevel@tonic-gate if(!(ASN1_tag2bit(otag) & it->utype)) { 186*0Sstevel@tonic-gate /* If OPTIONAL, assume this is OK */ 187*0Sstevel@tonic-gate if(opt) return -1; 188*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_WRONG_TAG); 189*0Sstevel@tonic-gate goto err; 190*0Sstevel@tonic-gate } 191*0Sstevel@tonic-gate return asn1_d2i_ex_primitive(pval, in, len, it, otag, 0, 0, ctx); 192*0Sstevel@tonic-gate 193*0Sstevel@tonic-gate case ASN1_ITYPE_EXTERN: 194*0Sstevel@tonic-gate /* Use new style d2i */ 195*0Sstevel@tonic-gate ef = it->funcs; 196*0Sstevel@tonic-gate return ef->asn1_ex_d2i(pval, in, len, it, tag, aclass, opt, ctx); 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate case ASN1_ITYPE_COMPAT: 199*0Sstevel@tonic-gate /* we must resort to old style evil hackery */ 200*0Sstevel@tonic-gate cf = it->funcs; 201*0Sstevel@tonic-gate 202*0Sstevel@tonic-gate /* If OPTIONAL see if it is there */ 203*0Sstevel@tonic-gate if(opt) { 204*0Sstevel@tonic-gate int exptag; 205*0Sstevel@tonic-gate p = *in; 206*0Sstevel@tonic-gate if(tag == -1) exptag = it->utype; 207*0Sstevel@tonic-gate else exptag = tag; 208*0Sstevel@tonic-gate /* Don't care about anything other than presence of expected tag */ 209*0Sstevel@tonic-gate ret = asn1_check_tlen(NULL, NULL, NULL, NULL, NULL, &p, len, exptag, aclass, 1, ctx); 210*0Sstevel@tonic-gate if(!ret) { 211*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 212*0Sstevel@tonic-gate goto err; 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate if(ret == -1) return -1; 215*0Sstevel@tonic-gate } 216*0Sstevel@tonic-gate /* This is the old style evil hack IMPLICIT handling: 217*0Sstevel@tonic-gate * since the underlying code is expecting a tag and 218*0Sstevel@tonic-gate * class other than the one present we change the 219*0Sstevel@tonic-gate * buffer temporarily then change it back afterwards. 220*0Sstevel@tonic-gate * This doesn't and never did work for tags > 30. 221*0Sstevel@tonic-gate * 222*0Sstevel@tonic-gate * Yes this is *horrible* but it is only needed for 223*0Sstevel@tonic-gate * old style d2i which will hopefully not be around 224*0Sstevel@tonic-gate * for much longer. 225*0Sstevel@tonic-gate * FIXME: should copy the buffer then modify it so 226*0Sstevel@tonic-gate * the input buffer can be const: we should *always* 227*0Sstevel@tonic-gate * copy because the old style d2i might modify the 228*0Sstevel@tonic-gate * buffer. 229*0Sstevel@tonic-gate */ 230*0Sstevel@tonic-gate 231*0Sstevel@tonic-gate if(tag != -1) { 232*0Sstevel@tonic-gate p = *in; 233*0Sstevel@tonic-gate imphack = *p; 234*0Sstevel@tonic-gate *p = (unsigned char)((*p & V_ASN1_CONSTRUCTED) | it->utype); 235*0Sstevel@tonic-gate } 236*0Sstevel@tonic-gate 237*0Sstevel@tonic-gate ptmpval = cf->asn1_d2i(pval, in, len); 238*0Sstevel@tonic-gate 239*0Sstevel@tonic-gate if(tag != -1) *p = imphack; 240*0Sstevel@tonic-gate 241*0Sstevel@tonic-gate if(ptmpval) return 1; 242*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 243*0Sstevel@tonic-gate goto err; 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate case ASN1_ITYPE_CHOICE: 247*0Sstevel@tonic-gate if(asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it)) 248*0Sstevel@tonic-gate goto auxerr; 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate /* Allocate structure */ 251*0Sstevel@tonic-gate if(!*pval) { 252*0Sstevel@tonic-gate if(!ASN1_item_ex_new(pval, it)) { 253*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 254*0Sstevel@tonic-gate goto err; 255*0Sstevel@tonic-gate } 256*0Sstevel@tonic-gate } 257*0Sstevel@tonic-gate /* CHOICE type, try each possibility in turn */ 258*0Sstevel@tonic-gate pchval = NULL; 259*0Sstevel@tonic-gate p = *in; 260*0Sstevel@tonic-gate for(i = 0, tt=it->templates; i < it->tcount; i++, tt++) { 261*0Sstevel@tonic-gate pchptr = asn1_get_field_ptr(pval, tt); 262*0Sstevel@tonic-gate /* We mark field as OPTIONAL so its absence 263*0Sstevel@tonic-gate * can be recognised. 264*0Sstevel@tonic-gate */ 265*0Sstevel@tonic-gate ret = asn1_template_ex_d2i(pchptr, &p, len, tt, 1, ctx); 266*0Sstevel@tonic-gate /* If field not present, try the next one */ 267*0Sstevel@tonic-gate if(ret == -1) continue; 268*0Sstevel@tonic-gate /* If positive return, read OK, break loop */ 269*0Sstevel@tonic-gate if(ret > 0) break; 270*0Sstevel@tonic-gate /* Otherwise must be an ASN1 parsing error */ 271*0Sstevel@tonic-gate errtt = tt; 272*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 273*0Sstevel@tonic-gate goto err; 274*0Sstevel@tonic-gate } 275*0Sstevel@tonic-gate /* Did we fall off the end without reading anything? */ 276*0Sstevel@tonic-gate if(i == it->tcount) { 277*0Sstevel@tonic-gate /* If OPTIONAL, this is OK */ 278*0Sstevel@tonic-gate if(opt) { 279*0Sstevel@tonic-gate /* Free and zero it */ 280*0Sstevel@tonic-gate ASN1_item_ex_free(pval, it); 281*0Sstevel@tonic-gate return -1; 282*0Sstevel@tonic-gate } 283*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_NO_MATCHING_CHOICE_TYPE); 284*0Sstevel@tonic-gate goto err; 285*0Sstevel@tonic-gate } 286*0Sstevel@tonic-gate asn1_set_choice_selector(pval, i, it); 287*0Sstevel@tonic-gate *in = p; 288*0Sstevel@tonic-gate if(asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it)) 289*0Sstevel@tonic-gate goto auxerr; 290*0Sstevel@tonic-gate return 1; 291*0Sstevel@tonic-gate 292*0Sstevel@tonic-gate case ASN1_ITYPE_SEQUENCE: 293*0Sstevel@tonic-gate p = *in; 294*0Sstevel@tonic-gate tmplen = len; 295*0Sstevel@tonic-gate 296*0Sstevel@tonic-gate /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */ 297*0Sstevel@tonic-gate if(tag == -1) { 298*0Sstevel@tonic-gate tag = V_ASN1_SEQUENCE; 299*0Sstevel@tonic-gate aclass = V_ASN1_UNIVERSAL; 300*0Sstevel@tonic-gate } 301*0Sstevel@tonic-gate /* Get SEQUENCE length and update len, p */ 302*0Sstevel@tonic-gate ret = asn1_check_tlen(&len, NULL, NULL, &seq_eoc, &cst, &p, len, tag, aclass, opt, ctx); 303*0Sstevel@tonic-gate if(!ret) { 304*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 305*0Sstevel@tonic-gate goto err; 306*0Sstevel@tonic-gate } else if(ret == -1) return -1; 307*0Sstevel@tonic-gate if(aux && (aux->flags & ASN1_AFLG_BROKEN)) { 308*0Sstevel@tonic-gate len = tmplen - (p - *in); 309*0Sstevel@tonic-gate seq_nolen = 1; 310*0Sstevel@tonic-gate } else seq_nolen = seq_eoc; /* If indefinite we don't do a length check */ 311*0Sstevel@tonic-gate if(!cst) { 312*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_NOT_CONSTRUCTED); 313*0Sstevel@tonic-gate goto err; 314*0Sstevel@tonic-gate } 315*0Sstevel@tonic-gate 316*0Sstevel@tonic-gate if(!*pval) { 317*0Sstevel@tonic-gate if(!ASN1_item_ex_new(pval, it)) { 318*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 319*0Sstevel@tonic-gate goto err; 320*0Sstevel@tonic-gate } 321*0Sstevel@tonic-gate } 322*0Sstevel@tonic-gate if(asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it)) 323*0Sstevel@tonic-gate goto auxerr; 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate /* Get each field entry */ 326*0Sstevel@tonic-gate for(i = 0, tt = it->templates; i < it->tcount; i++, tt++) { 327*0Sstevel@tonic-gate const ASN1_TEMPLATE *seqtt; 328*0Sstevel@tonic-gate ASN1_VALUE **pseqval; 329*0Sstevel@tonic-gate seqtt = asn1_do_adb(pval, tt, 1); 330*0Sstevel@tonic-gate if(!seqtt) goto err; 331*0Sstevel@tonic-gate pseqval = asn1_get_field_ptr(pval, seqtt); 332*0Sstevel@tonic-gate /* Have we ran out of data? */ 333*0Sstevel@tonic-gate if(!len) break; 334*0Sstevel@tonic-gate q = p; 335*0Sstevel@tonic-gate if(asn1_check_eoc(&p, len)) { 336*0Sstevel@tonic-gate if(!seq_eoc) { 337*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_UNEXPECTED_EOC); 338*0Sstevel@tonic-gate goto err; 339*0Sstevel@tonic-gate } 340*0Sstevel@tonic-gate len -= p - q; 341*0Sstevel@tonic-gate seq_eoc = 0; 342*0Sstevel@tonic-gate q = p; 343*0Sstevel@tonic-gate break; 344*0Sstevel@tonic-gate } 345*0Sstevel@tonic-gate /* This determines the OPTIONAL flag value. The field cannot 346*0Sstevel@tonic-gate * be omitted if it is the last of a SEQUENCE and there is 347*0Sstevel@tonic-gate * still data to be read. This isn't strictly necessary but 348*0Sstevel@tonic-gate * it increases efficiency in some cases. 349*0Sstevel@tonic-gate */ 350*0Sstevel@tonic-gate if(i == (it->tcount - 1)) isopt = 0; 351*0Sstevel@tonic-gate else isopt = (char)(seqtt->flags & ASN1_TFLG_OPTIONAL); 352*0Sstevel@tonic-gate /* attempt to read in field, allowing each to be OPTIONAL */ 353*0Sstevel@tonic-gate ret = asn1_template_ex_d2i(pseqval, &p, len, seqtt, isopt, ctx); 354*0Sstevel@tonic-gate if(!ret) { 355*0Sstevel@tonic-gate errtt = seqtt; 356*0Sstevel@tonic-gate goto err; 357*0Sstevel@tonic-gate } else if(ret == -1) { 358*0Sstevel@tonic-gate /* OPTIONAL component absent. Free and zero the field 359*0Sstevel@tonic-gate */ 360*0Sstevel@tonic-gate ASN1_template_free(pseqval, seqtt); 361*0Sstevel@tonic-gate continue; 362*0Sstevel@tonic-gate } 363*0Sstevel@tonic-gate /* Update length */ 364*0Sstevel@tonic-gate len -= p - q; 365*0Sstevel@tonic-gate } 366*0Sstevel@tonic-gate /* Check for EOC if expecting one */ 367*0Sstevel@tonic-gate if(seq_eoc && !asn1_check_eoc(&p, len)) { 368*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MISSING_EOC); 369*0Sstevel@tonic-gate goto err; 370*0Sstevel@tonic-gate } 371*0Sstevel@tonic-gate /* Check all data read */ 372*0Sstevel@tonic-gate if(!seq_nolen && len) { 373*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_SEQUENCE_LENGTH_MISMATCH); 374*0Sstevel@tonic-gate goto err; 375*0Sstevel@tonic-gate } 376*0Sstevel@tonic-gate 377*0Sstevel@tonic-gate /* If we get here we've got no more data in the SEQUENCE, 378*0Sstevel@tonic-gate * however we may not have read all fields so check all 379*0Sstevel@tonic-gate * remaining are OPTIONAL and clear any that are. 380*0Sstevel@tonic-gate */ 381*0Sstevel@tonic-gate for(; i < it->tcount; tt++, i++) { 382*0Sstevel@tonic-gate const ASN1_TEMPLATE *seqtt; 383*0Sstevel@tonic-gate seqtt = asn1_do_adb(pval, tt, 1); 384*0Sstevel@tonic-gate if(!seqtt) goto err; 385*0Sstevel@tonic-gate if(seqtt->flags & ASN1_TFLG_OPTIONAL) { 386*0Sstevel@tonic-gate ASN1_VALUE **pseqval; 387*0Sstevel@tonic-gate pseqval = asn1_get_field_ptr(pval, seqtt); 388*0Sstevel@tonic-gate ASN1_template_free(pseqval, seqtt); 389*0Sstevel@tonic-gate } else { 390*0Sstevel@tonic-gate errtt = seqtt; 391*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_FIELD_MISSING); 392*0Sstevel@tonic-gate goto err; 393*0Sstevel@tonic-gate } 394*0Sstevel@tonic-gate } 395*0Sstevel@tonic-gate /* Save encoding */ 396*0Sstevel@tonic-gate if(!asn1_enc_save(pval, *in, p - *in, it)) goto auxerr; 397*0Sstevel@tonic-gate *in = p; 398*0Sstevel@tonic-gate if(asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it)) 399*0Sstevel@tonic-gate goto auxerr; 400*0Sstevel@tonic-gate return 1; 401*0Sstevel@tonic-gate 402*0Sstevel@tonic-gate default: 403*0Sstevel@tonic-gate return 0; 404*0Sstevel@tonic-gate } 405*0Sstevel@tonic-gate auxerr: 406*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_AUX_ERROR); 407*0Sstevel@tonic-gate err: 408*0Sstevel@tonic-gate ASN1_item_ex_free(pval, it); 409*0Sstevel@tonic-gate if(errtt) ERR_add_error_data(4, "Field=", errtt->field_name, ", Type=", it->sname); 410*0Sstevel@tonic-gate else ERR_add_error_data(2, "Type=", it->sname); 411*0Sstevel@tonic-gate return 0; 412*0Sstevel@tonic-gate } 413*0Sstevel@tonic-gate 414*0Sstevel@tonic-gate /* Templates are handled with two separate functions. One handles any EXPLICIT tag and the other handles the 415*0Sstevel@tonic-gate * rest. 416*0Sstevel@tonic-gate */ 417*0Sstevel@tonic-gate 418*0Sstevel@tonic-gate static int asn1_template_ex_d2i(ASN1_VALUE **val, unsigned char **in, long inlen, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx) 419*0Sstevel@tonic-gate { 420*0Sstevel@tonic-gate int flags, aclass; 421*0Sstevel@tonic-gate int ret; 422*0Sstevel@tonic-gate long len; 423*0Sstevel@tonic-gate unsigned char *p, *q; 424*0Sstevel@tonic-gate char exp_eoc; 425*0Sstevel@tonic-gate if(!val) return 0; 426*0Sstevel@tonic-gate flags = tt->flags; 427*0Sstevel@tonic-gate aclass = flags & ASN1_TFLG_TAG_CLASS; 428*0Sstevel@tonic-gate 429*0Sstevel@tonic-gate p = *in; 430*0Sstevel@tonic-gate 431*0Sstevel@tonic-gate /* Check if EXPLICIT tag expected */ 432*0Sstevel@tonic-gate if(flags & ASN1_TFLG_EXPTAG) { 433*0Sstevel@tonic-gate char cst; 434*0Sstevel@tonic-gate /* Need to work out amount of data available to the inner content and where it 435*0Sstevel@tonic-gate * starts: so read in EXPLICIT header to get the info. 436*0Sstevel@tonic-gate */ 437*0Sstevel@tonic-gate ret = asn1_check_tlen(&len, NULL, NULL, &exp_eoc, &cst, &p, inlen, tt->tag, aclass, opt, ctx); 438*0Sstevel@tonic-gate q = p; 439*0Sstevel@tonic-gate if(!ret) { 440*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 441*0Sstevel@tonic-gate return 0; 442*0Sstevel@tonic-gate } else if(ret == -1) return -1; 443*0Sstevel@tonic-gate if(!cst) { 444*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED); 445*0Sstevel@tonic-gate return 0; 446*0Sstevel@tonic-gate } 447*0Sstevel@tonic-gate /* We've found the field so it can't be OPTIONAL now */ 448*0Sstevel@tonic-gate ret = asn1_template_noexp_d2i(val, &p, len, tt, 0, ctx); 449*0Sstevel@tonic-gate if(!ret) { 450*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 451*0Sstevel@tonic-gate return 0; 452*0Sstevel@tonic-gate } 453*0Sstevel@tonic-gate /* We read the field in OK so update length */ 454*0Sstevel@tonic-gate len -= p - q; 455*0Sstevel@tonic-gate if(exp_eoc) { 456*0Sstevel@tonic-gate /* If NDEF we must have an EOC here */ 457*0Sstevel@tonic-gate if(!asn1_check_eoc(&p, len)) { 458*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_MISSING_EOC); 459*0Sstevel@tonic-gate goto err; 460*0Sstevel@tonic-gate } 461*0Sstevel@tonic-gate } else { 462*0Sstevel@tonic-gate /* Otherwise we must hit the EXPLICIT tag end or its an error */ 463*0Sstevel@tonic-gate if(len) { 464*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_EXPLICIT_LENGTH_MISMATCH); 465*0Sstevel@tonic-gate goto err; 466*0Sstevel@tonic-gate } 467*0Sstevel@tonic-gate } 468*0Sstevel@tonic-gate } else 469*0Sstevel@tonic-gate return asn1_template_noexp_d2i(val, in, inlen, tt, opt, ctx); 470*0Sstevel@tonic-gate 471*0Sstevel@tonic-gate *in = p; 472*0Sstevel@tonic-gate return 1; 473*0Sstevel@tonic-gate 474*0Sstevel@tonic-gate err: 475*0Sstevel@tonic-gate ASN1_template_free(val, tt); 476*0Sstevel@tonic-gate *val = NULL; 477*0Sstevel@tonic-gate return 0; 478*0Sstevel@tonic-gate } 479*0Sstevel@tonic-gate 480*0Sstevel@tonic-gate static int asn1_template_noexp_d2i(ASN1_VALUE **val, unsigned char **in, long len, const ASN1_TEMPLATE *tt, char opt, ASN1_TLC *ctx) 481*0Sstevel@tonic-gate { 482*0Sstevel@tonic-gate int flags, aclass; 483*0Sstevel@tonic-gate int ret; 484*0Sstevel@tonic-gate unsigned char *p, *q; 485*0Sstevel@tonic-gate if(!val) return 0; 486*0Sstevel@tonic-gate flags = tt->flags; 487*0Sstevel@tonic-gate aclass = flags & ASN1_TFLG_TAG_CLASS; 488*0Sstevel@tonic-gate 489*0Sstevel@tonic-gate p = *in; 490*0Sstevel@tonic-gate q = p; 491*0Sstevel@tonic-gate 492*0Sstevel@tonic-gate if(flags & ASN1_TFLG_SK_MASK) { 493*0Sstevel@tonic-gate /* SET OF, SEQUENCE OF */ 494*0Sstevel@tonic-gate int sktag, skaclass; 495*0Sstevel@tonic-gate char sk_eoc; 496*0Sstevel@tonic-gate /* First work out expected inner tag value */ 497*0Sstevel@tonic-gate if(flags & ASN1_TFLG_IMPTAG) { 498*0Sstevel@tonic-gate sktag = tt->tag; 499*0Sstevel@tonic-gate skaclass = aclass; 500*0Sstevel@tonic-gate } else { 501*0Sstevel@tonic-gate skaclass = V_ASN1_UNIVERSAL; 502*0Sstevel@tonic-gate if(flags & ASN1_TFLG_SET_OF) sktag = V_ASN1_SET; 503*0Sstevel@tonic-gate else sktag = V_ASN1_SEQUENCE; 504*0Sstevel@tonic-gate } 505*0Sstevel@tonic-gate /* Get the tag */ 506*0Sstevel@tonic-gate ret = asn1_check_tlen(&len, NULL, NULL, &sk_eoc, NULL, &p, len, sktag, skaclass, opt, ctx); 507*0Sstevel@tonic-gate if(!ret) { 508*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_NESTED_ASN1_ERROR); 509*0Sstevel@tonic-gate return 0; 510*0Sstevel@tonic-gate } else if(ret == -1) return -1; 511*0Sstevel@tonic-gate if(!*val) *val = (ASN1_VALUE *)sk_new_null(); 512*0Sstevel@tonic-gate else { 513*0Sstevel@tonic-gate /* We've got a valid STACK: free up any items present */ 514*0Sstevel@tonic-gate STACK *sktmp = (STACK *)*val; 515*0Sstevel@tonic-gate ASN1_VALUE *vtmp; 516*0Sstevel@tonic-gate while(sk_num(sktmp) > 0) { 517*0Sstevel@tonic-gate vtmp = (ASN1_VALUE *)sk_pop(sktmp); 518*0Sstevel@tonic-gate ASN1_item_ex_free(&vtmp, ASN1_ITEM_ptr(tt->item)); 519*0Sstevel@tonic-gate } 520*0Sstevel@tonic-gate } 521*0Sstevel@tonic-gate 522*0Sstevel@tonic-gate if(!*val) { 523*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_EX_D2I, ERR_R_MALLOC_FAILURE); 524*0Sstevel@tonic-gate goto err; 525*0Sstevel@tonic-gate } 526*0Sstevel@tonic-gate /* Read as many items as we can */ 527*0Sstevel@tonic-gate while(len > 0) { 528*0Sstevel@tonic-gate ASN1_VALUE *skfield; 529*0Sstevel@tonic-gate q = p; 530*0Sstevel@tonic-gate /* See if EOC found */ 531*0Sstevel@tonic-gate if(asn1_check_eoc(&p, len)) { 532*0Sstevel@tonic-gate if(!sk_eoc) { 533*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_UNEXPECTED_EOC); 534*0Sstevel@tonic-gate goto err; 535*0Sstevel@tonic-gate } 536*0Sstevel@tonic-gate len -= p - q; 537*0Sstevel@tonic-gate sk_eoc = 0; 538*0Sstevel@tonic-gate break; 539*0Sstevel@tonic-gate } 540*0Sstevel@tonic-gate skfield = NULL; 541*0Sstevel@tonic-gate if(!ASN1_item_ex_d2i(&skfield, &p, len, ASN1_ITEM_ptr(tt->item), -1, 0, 0, ctx)) { 542*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR); 543*0Sstevel@tonic-gate goto err; 544*0Sstevel@tonic-gate } 545*0Sstevel@tonic-gate len -= p - q; 546*0Sstevel@tonic-gate if(!sk_push((STACK *)*val, (char *)skfield)) { 547*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_MALLOC_FAILURE); 548*0Sstevel@tonic-gate goto err; 549*0Sstevel@tonic-gate } 550*0Sstevel@tonic-gate } 551*0Sstevel@tonic-gate if(sk_eoc) { 552*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ASN1_R_MISSING_EOC); 553*0Sstevel@tonic-gate goto err; 554*0Sstevel@tonic-gate } 555*0Sstevel@tonic-gate } else if(flags & ASN1_TFLG_IMPTAG) { 556*0Sstevel@tonic-gate /* IMPLICIT tagging */ 557*0Sstevel@tonic-gate ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item), tt->tag, aclass, opt, ctx); 558*0Sstevel@tonic-gate if(!ret) { 559*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR); 560*0Sstevel@tonic-gate goto err; 561*0Sstevel@tonic-gate } else if(ret == -1) return -1; 562*0Sstevel@tonic-gate } else { 563*0Sstevel@tonic-gate /* Nothing special */ 564*0Sstevel@tonic-gate ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item), -1, 0, opt, ctx); 565*0Sstevel@tonic-gate if(!ret) { 566*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_TEMPLATE_D2I, ERR_R_NESTED_ASN1_ERROR); 567*0Sstevel@tonic-gate goto err; 568*0Sstevel@tonic-gate } else if(ret == -1) return -1; 569*0Sstevel@tonic-gate } 570*0Sstevel@tonic-gate 571*0Sstevel@tonic-gate *in = p; 572*0Sstevel@tonic-gate return 1; 573*0Sstevel@tonic-gate 574*0Sstevel@tonic-gate err: 575*0Sstevel@tonic-gate ASN1_template_free(val, tt); 576*0Sstevel@tonic-gate *val = NULL; 577*0Sstevel@tonic-gate return 0; 578*0Sstevel@tonic-gate } 579*0Sstevel@tonic-gate 580*0Sstevel@tonic-gate static int asn1_d2i_ex_primitive(ASN1_VALUE **pval, unsigned char **in, long inlen, 581*0Sstevel@tonic-gate const ASN1_ITEM *it, 582*0Sstevel@tonic-gate int tag, int aclass, char opt, ASN1_TLC *ctx) 583*0Sstevel@tonic-gate { 584*0Sstevel@tonic-gate int ret = 0, utype; 585*0Sstevel@tonic-gate long plen; 586*0Sstevel@tonic-gate char cst, inf, free_cont = 0; 587*0Sstevel@tonic-gate unsigned char *p; 588*0Sstevel@tonic-gate BUF_MEM buf; 589*0Sstevel@tonic-gate unsigned char *cont = NULL; 590*0Sstevel@tonic-gate long len; 591*0Sstevel@tonic-gate if(!pval) { 592*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_NULL); 593*0Sstevel@tonic-gate return 0; /* Should never happen */ 594*0Sstevel@tonic-gate } 595*0Sstevel@tonic-gate 596*0Sstevel@tonic-gate if(it->itype == ASN1_ITYPE_MSTRING) { 597*0Sstevel@tonic-gate utype = tag; 598*0Sstevel@tonic-gate tag = -1; 599*0Sstevel@tonic-gate } else utype = it->utype; 600*0Sstevel@tonic-gate 601*0Sstevel@tonic-gate if(utype == V_ASN1_ANY) { 602*0Sstevel@tonic-gate /* If type is ANY need to figure out type from tag */ 603*0Sstevel@tonic-gate unsigned char oclass; 604*0Sstevel@tonic-gate if(tag >= 0) { 605*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_TAGGED_ANY); 606*0Sstevel@tonic-gate return 0; 607*0Sstevel@tonic-gate } 608*0Sstevel@tonic-gate if(opt) { 609*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_ILLEGAL_OPTIONAL_ANY); 610*0Sstevel@tonic-gate return 0; 611*0Sstevel@tonic-gate } 612*0Sstevel@tonic-gate p = *in; 613*0Sstevel@tonic-gate ret = asn1_check_tlen(NULL, &utype, &oclass, NULL, NULL, &p, inlen, -1, 0, 0, ctx); 614*0Sstevel@tonic-gate if(!ret) { 615*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR); 616*0Sstevel@tonic-gate return 0; 617*0Sstevel@tonic-gate } 618*0Sstevel@tonic-gate if(oclass != V_ASN1_UNIVERSAL) utype = V_ASN1_OTHER; 619*0Sstevel@tonic-gate } 620*0Sstevel@tonic-gate if(tag == -1) { 621*0Sstevel@tonic-gate tag = utype; 622*0Sstevel@tonic-gate aclass = V_ASN1_UNIVERSAL; 623*0Sstevel@tonic-gate } 624*0Sstevel@tonic-gate p = *in; 625*0Sstevel@tonic-gate /* Check header */ 626*0Sstevel@tonic-gate ret = asn1_check_tlen(&plen, NULL, NULL, &inf, &cst, &p, inlen, tag, aclass, opt, ctx); 627*0Sstevel@tonic-gate if(!ret) { 628*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_NESTED_ASN1_ERROR); 629*0Sstevel@tonic-gate return 0; 630*0Sstevel@tonic-gate } else if(ret == -1) return -1; 631*0Sstevel@tonic-gate /* SEQUENCE, SET and "OTHER" are left in encoded form */ 632*0Sstevel@tonic-gate if((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) || (utype == V_ASN1_OTHER)) { 633*0Sstevel@tonic-gate /* Clear context cache for type OTHER because the auto clear when 634*0Sstevel@tonic-gate * we have a exact match wont work 635*0Sstevel@tonic-gate */ 636*0Sstevel@tonic-gate if(utype == V_ASN1_OTHER) { 637*0Sstevel@tonic-gate asn1_tlc_clear(ctx); 638*0Sstevel@tonic-gate /* SEQUENCE and SET must be constructed */ 639*0Sstevel@tonic-gate } else if(!cst) { 640*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_TYPE_NOT_CONSTRUCTED); 641*0Sstevel@tonic-gate return 0; 642*0Sstevel@tonic-gate } 643*0Sstevel@tonic-gate 644*0Sstevel@tonic-gate cont = *in; 645*0Sstevel@tonic-gate /* If indefinite length constructed find the real end */ 646*0Sstevel@tonic-gate if(inf) { 647*0Sstevel@tonic-gate if(!asn1_collect(NULL, &p, plen, inf, -1, -1)) goto err; 648*0Sstevel@tonic-gate len = p - cont; 649*0Sstevel@tonic-gate } else { 650*0Sstevel@tonic-gate len = p - cont + plen; 651*0Sstevel@tonic-gate p += plen; 652*0Sstevel@tonic-gate buf.data = NULL; 653*0Sstevel@tonic-gate } 654*0Sstevel@tonic-gate } else if(cst) { 655*0Sstevel@tonic-gate buf.length = 0; 656*0Sstevel@tonic-gate buf.max = 0; 657*0Sstevel@tonic-gate buf.data = NULL; 658*0Sstevel@tonic-gate /* Should really check the internal tags are correct but 659*0Sstevel@tonic-gate * some things may get this wrong. The relevant specs 660*0Sstevel@tonic-gate * say that constructed string types should be OCTET STRINGs 661*0Sstevel@tonic-gate * internally irrespective of the type. So instead just check 662*0Sstevel@tonic-gate * for UNIVERSAL class and ignore the tag. 663*0Sstevel@tonic-gate */ 664*0Sstevel@tonic-gate if(!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL)) goto err; 665*0Sstevel@tonic-gate len = buf.length; 666*0Sstevel@tonic-gate /* Append a final null to string */ 667*0Sstevel@tonic-gate if(!BUF_MEM_grow_clean(&buf, len + 1)) { 668*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE); 669*0Sstevel@tonic-gate return 0; 670*0Sstevel@tonic-gate } 671*0Sstevel@tonic-gate buf.data[len] = 0; 672*0Sstevel@tonic-gate cont = (unsigned char *)buf.data; 673*0Sstevel@tonic-gate free_cont = 1; 674*0Sstevel@tonic-gate } else { 675*0Sstevel@tonic-gate cont = p; 676*0Sstevel@tonic-gate len = plen; 677*0Sstevel@tonic-gate p += plen; 678*0Sstevel@tonic-gate } 679*0Sstevel@tonic-gate 680*0Sstevel@tonic-gate /* We now have content length and type: translate into a structure */ 681*0Sstevel@tonic-gate if(!asn1_ex_c2i(pval, cont, len, utype, &free_cont, it)) goto err; 682*0Sstevel@tonic-gate 683*0Sstevel@tonic-gate *in = p; 684*0Sstevel@tonic-gate ret = 1; 685*0Sstevel@tonic-gate err: 686*0Sstevel@tonic-gate if(free_cont && buf.data) OPENSSL_free(buf.data); 687*0Sstevel@tonic-gate return ret; 688*0Sstevel@tonic-gate } 689*0Sstevel@tonic-gate 690*0Sstevel@tonic-gate /* Translate ASN1 content octets into a structure */ 691*0Sstevel@tonic-gate 692*0Sstevel@tonic-gate int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it) 693*0Sstevel@tonic-gate { 694*0Sstevel@tonic-gate ASN1_VALUE **opval = NULL; 695*0Sstevel@tonic-gate ASN1_STRING *stmp; 696*0Sstevel@tonic-gate ASN1_TYPE *typ = NULL; 697*0Sstevel@tonic-gate int ret = 0; 698*0Sstevel@tonic-gate const ASN1_PRIMITIVE_FUNCS *pf; 699*0Sstevel@tonic-gate ASN1_INTEGER **tint; 700*0Sstevel@tonic-gate pf = it->funcs; 701*0Sstevel@tonic-gate if(pf && pf->prim_c2i) return pf->prim_c2i(pval, cont, len, utype, free_cont, it); 702*0Sstevel@tonic-gate /* If ANY type clear type and set pointer to internal value */ 703*0Sstevel@tonic-gate if(it->utype == V_ASN1_ANY) { 704*0Sstevel@tonic-gate if(!*pval) { 705*0Sstevel@tonic-gate typ = ASN1_TYPE_new(); 706*0Sstevel@tonic-gate *pval = (ASN1_VALUE *)typ; 707*0Sstevel@tonic-gate } else typ = (ASN1_TYPE *)*pval; 708*0Sstevel@tonic-gate if(utype != typ->type) ASN1_TYPE_set(typ, utype, NULL); 709*0Sstevel@tonic-gate opval = pval; 710*0Sstevel@tonic-gate pval = (ASN1_VALUE **)&typ->value.ptr; 711*0Sstevel@tonic-gate } 712*0Sstevel@tonic-gate switch(utype) { 713*0Sstevel@tonic-gate case V_ASN1_OBJECT: 714*0Sstevel@tonic-gate if(!c2i_ASN1_OBJECT((ASN1_OBJECT **)pval, &cont, len)) goto err; 715*0Sstevel@tonic-gate break; 716*0Sstevel@tonic-gate 717*0Sstevel@tonic-gate case V_ASN1_NULL: 718*0Sstevel@tonic-gate if(len) { 719*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_NULL_IS_WRONG_LENGTH); 720*0Sstevel@tonic-gate goto err; 721*0Sstevel@tonic-gate } 722*0Sstevel@tonic-gate *pval = (ASN1_VALUE *)1; 723*0Sstevel@tonic-gate break; 724*0Sstevel@tonic-gate 725*0Sstevel@tonic-gate case V_ASN1_BOOLEAN: 726*0Sstevel@tonic-gate if(len != 1) { 727*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ASN1_R_BOOLEAN_IS_WRONG_LENGTH); 728*0Sstevel@tonic-gate goto err; 729*0Sstevel@tonic-gate } else { 730*0Sstevel@tonic-gate ASN1_BOOLEAN *tbool; 731*0Sstevel@tonic-gate tbool = (ASN1_BOOLEAN *)pval; 732*0Sstevel@tonic-gate *tbool = *cont; 733*0Sstevel@tonic-gate } 734*0Sstevel@tonic-gate break; 735*0Sstevel@tonic-gate 736*0Sstevel@tonic-gate case V_ASN1_BIT_STRING: 737*0Sstevel@tonic-gate if(!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING **)pval, &cont, len)) goto err; 738*0Sstevel@tonic-gate break; 739*0Sstevel@tonic-gate 740*0Sstevel@tonic-gate case V_ASN1_INTEGER: 741*0Sstevel@tonic-gate case V_ASN1_NEG_INTEGER: 742*0Sstevel@tonic-gate case V_ASN1_ENUMERATED: 743*0Sstevel@tonic-gate case V_ASN1_NEG_ENUMERATED: 744*0Sstevel@tonic-gate tint = (ASN1_INTEGER **)pval; 745*0Sstevel@tonic-gate if(!c2i_ASN1_INTEGER(tint, &cont, len)) goto err; 746*0Sstevel@tonic-gate /* Fixup type to match the expected form */ 747*0Sstevel@tonic-gate (*tint)->type = utype | ((*tint)->type & V_ASN1_NEG); 748*0Sstevel@tonic-gate break; 749*0Sstevel@tonic-gate 750*0Sstevel@tonic-gate case V_ASN1_OCTET_STRING: 751*0Sstevel@tonic-gate case V_ASN1_NUMERICSTRING: 752*0Sstevel@tonic-gate case V_ASN1_PRINTABLESTRING: 753*0Sstevel@tonic-gate case V_ASN1_T61STRING: 754*0Sstevel@tonic-gate case V_ASN1_VIDEOTEXSTRING: 755*0Sstevel@tonic-gate case V_ASN1_IA5STRING: 756*0Sstevel@tonic-gate case V_ASN1_UTCTIME: 757*0Sstevel@tonic-gate case V_ASN1_GENERALIZEDTIME: 758*0Sstevel@tonic-gate case V_ASN1_GRAPHICSTRING: 759*0Sstevel@tonic-gate case V_ASN1_VISIBLESTRING: 760*0Sstevel@tonic-gate case V_ASN1_GENERALSTRING: 761*0Sstevel@tonic-gate case V_ASN1_UNIVERSALSTRING: 762*0Sstevel@tonic-gate case V_ASN1_BMPSTRING: 763*0Sstevel@tonic-gate case V_ASN1_UTF8STRING: 764*0Sstevel@tonic-gate case V_ASN1_OTHER: 765*0Sstevel@tonic-gate case V_ASN1_SET: 766*0Sstevel@tonic-gate case V_ASN1_SEQUENCE: 767*0Sstevel@tonic-gate default: 768*0Sstevel@tonic-gate /* All based on ASN1_STRING and handled the same */ 769*0Sstevel@tonic-gate if(!*pval) { 770*0Sstevel@tonic-gate stmp = ASN1_STRING_type_new(utype); 771*0Sstevel@tonic-gate if(!stmp) { 772*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE); 773*0Sstevel@tonic-gate goto err; 774*0Sstevel@tonic-gate } 775*0Sstevel@tonic-gate *pval = (ASN1_VALUE *)stmp; 776*0Sstevel@tonic-gate } else { 777*0Sstevel@tonic-gate stmp = (ASN1_STRING *)*pval; 778*0Sstevel@tonic-gate stmp->type = utype; 779*0Sstevel@tonic-gate } 780*0Sstevel@tonic-gate /* If we've already allocated a buffer use it */ 781*0Sstevel@tonic-gate if(*free_cont) { 782*0Sstevel@tonic-gate if(stmp->data) OPENSSL_free(stmp->data); 783*0Sstevel@tonic-gate stmp->data = cont; 784*0Sstevel@tonic-gate stmp->length = len; 785*0Sstevel@tonic-gate *free_cont = 0; 786*0Sstevel@tonic-gate } else { 787*0Sstevel@tonic-gate if(!ASN1_STRING_set(stmp, cont, len)) { 788*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, ERR_R_MALLOC_FAILURE); 789*0Sstevel@tonic-gate ASN1_STRING_free(stmp); 790*0Sstevel@tonic-gate *pval = NULL; 791*0Sstevel@tonic-gate goto err; 792*0Sstevel@tonic-gate } 793*0Sstevel@tonic-gate } 794*0Sstevel@tonic-gate break; 795*0Sstevel@tonic-gate } 796*0Sstevel@tonic-gate /* If ASN1_ANY and NULL type fix up value */ 797*0Sstevel@tonic-gate if(typ && utype==V_ASN1_NULL) typ->value.ptr = NULL; 798*0Sstevel@tonic-gate 799*0Sstevel@tonic-gate ret = 1; 800*0Sstevel@tonic-gate err: 801*0Sstevel@tonic-gate if(!ret) 802*0Sstevel@tonic-gate { 803*0Sstevel@tonic-gate ASN1_TYPE_free(typ); 804*0Sstevel@tonic-gate if (opval) 805*0Sstevel@tonic-gate *opval = NULL; 806*0Sstevel@tonic-gate } 807*0Sstevel@tonic-gate return ret; 808*0Sstevel@tonic-gate } 809*0Sstevel@tonic-gate 810*0Sstevel@tonic-gate /* This function collects the asn1 data from a constructred string 811*0Sstevel@tonic-gate * type into a buffer. The values of 'in' and 'len' should refer 812*0Sstevel@tonic-gate * to the contents of the constructed type and 'inf' should be set 813*0Sstevel@tonic-gate * if it is indefinite length. If 'buf' is NULL then we just want 814*0Sstevel@tonic-gate * to find the end of the current structure: useful for indefinite 815*0Sstevel@tonic-gate * length constructed stuff. 816*0Sstevel@tonic-gate */ 817*0Sstevel@tonic-gate 818*0Sstevel@tonic-gate static int asn1_collect(BUF_MEM *buf, unsigned char **in, long len, char inf, int tag, int aclass) 819*0Sstevel@tonic-gate { 820*0Sstevel@tonic-gate unsigned char *p, *q; 821*0Sstevel@tonic-gate long plen; 822*0Sstevel@tonic-gate char cst, ininf; 823*0Sstevel@tonic-gate p = *in; 824*0Sstevel@tonic-gate inf &= 1; 825*0Sstevel@tonic-gate /* If no buffer and not indefinite length constructed just pass over the encoded data */ 826*0Sstevel@tonic-gate if(!buf && !inf) { 827*0Sstevel@tonic-gate *in += len; 828*0Sstevel@tonic-gate return 1; 829*0Sstevel@tonic-gate } 830*0Sstevel@tonic-gate while(len > 0) { 831*0Sstevel@tonic-gate q = p; 832*0Sstevel@tonic-gate /* Check for EOC */ 833*0Sstevel@tonic-gate if(asn1_check_eoc(&p, len)) { 834*0Sstevel@tonic-gate /* EOC is illegal outside indefinite length constructed form */ 835*0Sstevel@tonic-gate if(!inf) { 836*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_UNEXPECTED_EOC); 837*0Sstevel@tonic-gate return 0; 838*0Sstevel@tonic-gate } 839*0Sstevel@tonic-gate inf = 0; 840*0Sstevel@tonic-gate break; 841*0Sstevel@tonic-gate } 842*0Sstevel@tonic-gate if(!asn1_check_tlen(&plen, NULL, NULL, &ininf, &cst, &p, len, tag, aclass, 0, NULL)) { 843*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_COLLECT, ERR_R_NESTED_ASN1_ERROR); 844*0Sstevel@tonic-gate return 0; 845*0Sstevel@tonic-gate } 846*0Sstevel@tonic-gate /* If indefinite length constructed update max length */ 847*0Sstevel@tonic-gate if(cst) { 848*0Sstevel@tonic-gate if(!asn1_collect(buf, &p, plen, ininf, tag, aclass)) return 0; 849*0Sstevel@tonic-gate } else { 850*0Sstevel@tonic-gate if(!collect_data(buf, &p, plen)) return 0; 851*0Sstevel@tonic-gate } 852*0Sstevel@tonic-gate len -= p - q; 853*0Sstevel@tonic-gate } 854*0Sstevel@tonic-gate if(inf) { 855*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_COLLECT, ASN1_R_MISSING_EOC); 856*0Sstevel@tonic-gate return 0; 857*0Sstevel@tonic-gate } 858*0Sstevel@tonic-gate *in = p; 859*0Sstevel@tonic-gate return 1; 860*0Sstevel@tonic-gate } 861*0Sstevel@tonic-gate 862*0Sstevel@tonic-gate static int collect_data(BUF_MEM *buf, unsigned char **p, long plen) 863*0Sstevel@tonic-gate { 864*0Sstevel@tonic-gate int len; 865*0Sstevel@tonic-gate if(buf) { 866*0Sstevel@tonic-gate len = buf->length; 867*0Sstevel@tonic-gate if(!BUF_MEM_grow_clean(buf, len + plen)) { 868*0Sstevel@tonic-gate ASN1err(ASN1_F_COLLECT_DATA, ERR_R_MALLOC_FAILURE); 869*0Sstevel@tonic-gate return 0; 870*0Sstevel@tonic-gate } 871*0Sstevel@tonic-gate memcpy(buf->data + len, *p, plen); 872*0Sstevel@tonic-gate } 873*0Sstevel@tonic-gate *p += plen; 874*0Sstevel@tonic-gate return 1; 875*0Sstevel@tonic-gate } 876*0Sstevel@tonic-gate 877*0Sstevel@tonic-gate /* Check for ASN1 EOC and swallow it if found */ 878*0Sstevel@tonic-gate 879*0Sstevel@tonic-gate static int asn1_check_eoc(unsigned char **in, long len) 880*0Sstevel@tonic-gate { 881*0Sstevel@tonic-gate unsigned char *p; 882*0Sstevel@tonic-gate if(len < 2) return 0; 883*0Sstevel@tonic-gate p = *in; 884*0Sstevel@tonic-gate if(!p[0] && !p[1]) { 885*0Sstevel@tonic-gate *in += 2; 886*0Sstevel@tonic-gate return 1; 887*0Sstevel@tonic-gate } 888*0Sstevel@tonic-gate return 0; 889*0Sstevel@tonic-gate } 890*0Sstevel@tonic-gate 891*0Sstevel@tonic-gate /* Check an ASN1 tag and length: a bit like ASN1_get_object 892*0Sstevel@tonic-gate * but it sets the length for indefinite length constructed 893*0Sstevel@tonic-gate * form, we don't know the exact length but we can set an 894*0Sstevel@tonic-gate * upper bound to the amount of data available minus the 895*0Sstevel@tonic-gate * header length just read. 896*0Sstevel@tonic-gate */ 897*0Sstevel@tonic-gate 898*0Sstevel@tonic-gate static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass, char *inf, char *cst, 899*0Sstevel@tonic-gate unsigned char **in, long len, int exptag, int expclass, char opt, ASN1_TLC *ctx) 900*0Sstevel@tonic-gate { 901*0Sstevel@tonic-gate int i; 902*0Sstevel@tonic-gate int ptag, pclass; 903*0Sstevel@tonic-gate long plen; 904*0Sstevel@tonic-gate unsigned char *p, *q; 905*0Sstevel@tonic-gate p = *in; 906*0Sstevel@tonic-gate q = p; 907*0Sstevel@tonic-gate 908*0Sstevel@tonic-gate if(ctx && ctx->valid) { 909*0Sstevel@tonic-gate i = ctx->ret; 910*0Sstevel@tonic-gate plen = ctx->plen; 911*0Sstevel@tonic-gate pclass = ctx->pclass; 912*0Sstevel@tonic-gate ptag = ctx->ptag; 913*0Sstevel@tonic-gate p += ctx->hdrlen; 914*0Sstevel@tonic-gate } else { 915*0Sstevel@tonic-gate i = ASN1_get_object(&p, &plen, &ptag, &pclass, len); 916*0Sstevel@tonic-gate if(ctx) { 917*0Sstevel@tonic-gate ctx->ret = i; 918*0Sstevel@tonic-gate ctx->plen = plen; 919*0Sstevel@tonic-gate ctx->pclass = pclass; 920*0Sstevel@tonic-gate ctx->ptag = ptag; 921*0Sstevel@tonic-gate ctx->hdrlen = p - q; 922*0Sstevel@tonic-gate ctx->valid = 1; 923*0Sstevel@tonic-gate /* If definite length, and no error, length + 924*0Sstevel@tonic-gate * header can't exceed total amount of data available. 925*0Sstevel@tonic-gate */ 926*0Sstevel@tonic-gate if(!(i & 0x81) && ((plen + ctx->hdrlen) > len)) { 927*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_TOO_LONG); 928*0Sstevel@tonic-gate asn1_tlc_clear(ctx); 929*0Sstevel@tonic-gate return 0; 930*0Sstevel@tonic-gate } 931*0Sstevel@tonic-gate } 932*0Sstevel@tonic-gate } 933*0Sstevel@tonic-gate 934*0Sstevel@tonic-gate if(i & 0x80) { 935*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_BAD_OBJECT_HEADER); 936*0Sstevel@tonic-gate asn1_tlc_clear(ctx); 937*0Sstevel@tonic-gate return 0; 938*0Sstevel@tonic-gate } 939*0Sstevel@tonic-gate if(exptag >= 0) { 940*0Sstevel@tonic-gate if((exptag != ptag) || (expclass != pclass)) { 941*0Sstevel@tonic-gate /* If type is OPTIONAL, not an error, but indicate missing 942*0Sstevel@tonic-gate * type. 943*0Sstevel@tonic-gate */ 944*0Sstevel@tonic-gate if(opt) return -1; 945*0Sstevel@tonic-gate asn1_tlc_clear(ctx); 946*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_CHECK_TLEN, ASN1_R_WRONG_TAG); 947*0Sstevel@tonic-gate return 0; 948*0Sstevel@tonic-gate } 949*0Sstevel@tonic-gate /* We have a tag and class match, so assume we are going to do something with it */ 950*0Sstevel@tonic-gate asn1_tlc_clear(ctx); 951*0Sstevel@tonic-gate } 952*0Sstevel@tonic-gate 953*0Sstevel@tonic-gate if(i & 1) plen = len - (p - q); 954*0Sstevel@tonic-gate 955*0Sstevel@tonic-gate if(inf) *inf = i & 1; 956*0Sstevel@tonic-gate 957*0Sstevel@tonic-gate if(cst) *cst = i & V_ASN1_CONSTRUCTED; 958*0Sstevel@tonic-gate 959*0Sstevel@tonic-gate if(olen) *olen = plen; 960*0Sstevel@tonic-gate if(oclass) *oclass = pclass; 961*0Sstevel@tonic-gate if(otag) *otag = ptag; 962*0Sstevel@tonic-gate 963*0Sstevel@tonic-gate *in = p; 964*0Sstevel@tonic-gate return 1; 965*0Sstevel@tonic-gate } 966