1*0Sstevel@tonic-gate /* crypto/asn1/a_bytes.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include <stdio.h> 60*0Sstevel@tonic-gate #include "cryptlib.h" 61*0Sstevel@tonic-gate #include <openssl/asn1.h> 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c); 64*0Sstevel@tonic-gate /* type is a 'bitmap' of acceptable string types. 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp, 67*0Sstevel@tonic-gate long length, int type) 68*0Sstevel@tonic-gate { 69*0Sstevel@tonic-gate ASN1_STRING *ret=NULL; 70*0Sstevel@tonic-gate unsigned char *p,*s; 71*0Sstevel@tonic-gate long len; 72*0Sstevel@tonic-gate int inf,tag,xclass; 73*0Sstevel@tonic-gate int i=0; 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate p= *pp; 76*0Sstevel@tonic-gate inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 77*0Sstevel@tonic-gate if (inf & 0x80) goto err; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate if (tag >= 32) 80*0Sstevel@tonic-gate { 81*0Sstevel@tonic-gate i=ASN1_R_TAG_VALUE_TOO_HIGH;; 82*0Sstevel@tonic-gate goto err; 83*0Sstevel@tonic-gate } 84*0Sstevel@tonic-gate if (!(ASN1_tag2bit(tag) & type)) 85*0Sstevel@tonic-gate { 86*0Sstevel@tonic-gate i=ASN1_R_WRONG_TYPE; 87*0Sstevel@tonic-gate goto err; 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate /* If a bit-string, exit early */ 91*0Sstevel@tonic-gate if (tag == V_ASN1_BIT_STRING) 92*0Sstevel@tonic-gate return(d2i_ASN1_BIT_STRING(a,pp,length)); 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate if ((a == NULL) || ((*a) == NULL)) 95*0Sstevel@tonic-gate { 96*0Sstevel@tonic-gate if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate else 99*0Sstevel@tonic-gate ret=(*a); 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate if (len != 0) 102*0Sstevel@tonic-gate { 103*0Sstevel@tonic-gate s=(unsigned char *)OPENSSL_malloc((int)len+1); 104*0Sstevel@tonic-gate if (s == NULL) 105*0Sstevel@tonic-gate { 106*0Sstevel@tonic-gate i=ERR_R_MALLOC_FAILURE; 107*0Sstevel@tonic-gate goto err; 108*0Sstevel@tonic-gate } 109*0Sstevel@tonic-gate memcpy(s,p,(int)len); 110*0Sstevel@tonic-gate s[len]='\0'; 111*0Sstevel@tonic-gate p+=len; 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate else 114*0Sstevel@tonic-gate s=NULL; 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate if (ret->data != NULL) OPENSSL_free(ret->data); 117*0Sstevel@tonic-gate ret->length=(int)len; 118*0Sstevel@tonic-gate ret->data=s; 119*0Sstevel@tonic-gate ret->type=tag; 120*0Sstevel@tonic-gate if (a != NULL) (*a)=ret; 121*0Sstevel@tonic-gate *pp=p; 122*0Sstevel@tonic-gate return(ret); 123*0Sstevel@tonic-gate err: 124*0Sstevel@tonic-gate ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i); 125*0Sstevel@tonic-gate if ((ret != NULL) && ((a == NULL) || (*a != ret))) 126*0Sstevel@tonic-gate ASN1_STRING_free(ret); 127*0Sstevel@tonic-gate return(NULL); 128*0Sstevel@tonic-gate } 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) 131*0Sstevel@tonic-gate { 132*0Sstevel@tonic-gate int ret,r,constructed; 133*0Sstevel@tonic-gate unsigned char *p; 134*0Sstevel@tonic-gate 135*0Sstevel@tonic-gate if (a == NULL) return(0); 136*0Sstevel@tonic-gate 137*0Sstevel@tonic-gate if (tag == V_ASN1_BIT_STRING) 138*0Sstevel@tonic-gate return(i2d_ASN1_BIT_STRING(a,pp)); 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate ret=a->length; 141*0Sstevel@tonic-gate r=ASN1_object_size(0,ret,tag); 142*0Sstevel@tonic-gate if (pp == NULL) return(r); 143*0Sstevel@tonic-gate p= *pp; 144*0Sstevel@tonic-gate 145*0Sstevel@tonic-gate if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) 146*0Sstevel@tonic-gate constructed=1; 147*0Sstevel@tonic-gate else 148*0Sstevel@tonic-gate constructed=0; 149*0Sstevel@tonic-gate ASN1_put_object(&p,constructed,ret,tag,xclass); 150*0Sstevel@tonic-gate memcpy(p,a->data,a->length); 151*0Sstevel@tonic-gate p+=a->length; 152*0Sstevel@tonic-gate *pp= p; 153*0Sstevel@tonic-gate return(r); 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length, 157*0Sstevel@tonic-gate int Ptag, int Pclass) 158*0Sstevel@tonic-gate { 159*0Sstevel@tonic-gate ASN1_STRING *ret=NULL; 160*0Sstevel@tonic-gate unsigned char *p,*s; 161*0Sstevel@tonic-gate long len; 162*0Sstevel@tonic-gate int inf,tag,xclass; 163*0Sstevel@tonic-gate int i=0; 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate if ((a == NULL) || ((*a) == NULL)) 166*0Sstevel@tonic-gate { 167*0Sstevel@tonic-gate if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate else 170*0Sstevel@tonic-gate ret=(*a); 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate p= *pp; 173*0Sstevel@tonic-gate inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 174*0Sstevel@tonic-gate if (inf & 0x80) 175*0Sstevel@tonic-gate { 176*0Sstevel@tonic-gate i=ASN1_R_BAD_OBJECT_HEADER; 177*0Sstevel@tonic-gate goto err; 178*0Sstevel@tonic-gate } 179*0Sstevel@tonic-gate 180*0Sstevel@tonic-gate if (tag != Ptag) 181*0Sstevel@tonic-gate { 182*0Sstevel@tonic-gate i=ASN1_R_WRONG_TAG; 183*0Sstevel@tonic-gate goto err; 184*0Sstevel@tonic-gate } 185*0Sstevel@tonic-gate 186*0Sstevel@tonic-gate if (inf & V_ASN1_CONSTRUCTED) 187*0Sstevel@tonic-gate { 188*0Sstevel@tonic-gate ASN1_CTX c; 189*0Sstevel@tonic-gate 190*0Sstevel@tonic-gate c.pp=pp; 191*0Sstevel@tonic-gate c.p=p; 192*0Sstevel@tonic-gate c.inf=inf; 193*0Sstevel@tonic-gate c.slen=len; 194*0Sstevel@tonic-gate c.tag=Ptag; 195*0Sstevel@tonic-gate c.xclass=Pclass; 196*0Sstevel@tonic-gate c.max=(length == 0)?0:(p+length); 197*0Sstevel@tonic-gate if (!asn1_collate_primitive(ret,&c)) 198*0Sstevel@tonic-gate goto err; 199*0Sstevel@tonic-gate else 200*0Sstevel@tonic-gate { 201*0Sstevel@tonic-gate p=c.p; 202*0Sstevel@tonic-gate } 203*0Sstevel@tonic-gate } 204*0Sstevel@tonic-gate else 205*0Sstevel@tonic-gate { 206*0Sstevel@tonic-gate if (len != 0) 207*0Sstevel@tonic-gate { 208*0Sstevel@tonic-gate if ((ret->length < len) || (ret->data == NULL)) 209*0Sstevel@tonic-gate { 210*0Sstevel@tonic-gate if (ret->data != NULL) OPENSSL_free(ret->data); 211*0Sstevel@tonic-gate s=(unsigned char *)OPENSSL_malloc((int)len + 1); 212*0Sstevel@tonic-gate if (s == NULL) 213*0Sstevel@tonic-gate { 214*0Sstevel@tonic-gate i=ERR_R_MALLOC_FAILURE; 215*0Sstevel@tonic-gate goto err; 216*0Sstevel@tonic-gate } 217*0Sstevel@tonic-gate } 218*0Sstevel@tonic-gate else 219*0Sstevel@tonic-gate s=ret->data; 220*0Sstevel@tonic-gate memcpy(s,p,(int)len); 221*0Sstevel@tonic-gate s[len] = '\0'; 222*0Sstevel@tonic-gate p+=len; 223*0Sstevel@tonic-gate } 224*0Sstevel@tonic-gate else 225*0Sstevel@tonic-gate { 226*0Sstevel@tonic-gate s=NULL; 227*0Sstevel@tonic-gate if (ret->data != NULL) OPENSSL_free(ret->data); 228*0Sstevel@tonic-gate } 229*0Sstevel@tonic-gate 230*0Sstevel@tonic-gate ret->length=(int)len; 231*0Sstevel@tonic-gate ret->data=s; 232*0Sstevel@tonic-gate ret->type=Ptag; 233*0Sstevel@tonic-gate } 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate if (a != NULL) (*a)=ret; 236*0Sstevel@tonic-gate *pp=p; 237*0Sstevel@tonic-gate return(ret); 238*0Sstevel@tonic-gate err: 239*0Sstevel@tonic-gate if ((ret != NULL) && ((a == NULL) || (*a != ret))) 240*0Sstevel@tonic-gate ASN1_STRING_free(ret); 241*0Sstevel@tonic-gate ASN1err(ASN1_F_D2I_ASN1_BYTES,i); 242*0Sstevel@tonic-gate return(NULL); 243*0Sstevel@tonic-gate } 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate /* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse 247*0Sstevel@tonic-gate * them into the one structure that is then returned */ 248*0Sstevel@tonic-gate /* There have been a few bug fixes for this function from 249*0Sstevel@tonic-gate * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */ 250*0Sstevel@tonic-gate static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c) 251*0Sstevel@tonic-gate { 252*0Sstevel@tonic-gate ASN1_STRING *os=NULL; 253*0Sstevel@tonic-gate BUF_MEM b; 254*0Sstevel@tonic-gate int num; 255*0Sstevel@tonic-gate 256*0Sstevel@tonic-gate b.length=0; 257*0Sstevel@tonic-gate b.max=0; 258*0Sstevel@tonic-gate b.data=NULL; 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate if (a == NULL) 261*0Sstevel@tonic-gate { 262*0Sstevel@tonic-gate c->error=ERR_R_PASSED_NULL_PARAMETER; 263*0Sstevel@tonic-gate goto err; 264*0Sstevel@tonic-gate } 265*0Sstevel@tonic-gate 266*0Sstevel@tonic-gate num=0; 267*0Sstevel@tonic-gate for (;;) 268*0Sstevel@tonic-gate { 269*0Sstevel@tonic-gate if (c->inf & 1) 270*0Sstevel@tonic-gate { 271*0Sstevel@tonic-gate c->eos=ASN1_check_infinite_end(&c->p, 272*0Sstevel@tonic-gate (long)(c->max-c->p)); 273*0Sstevel@tonic-gate if (c->eos) break; 274*0Sstevel@tonic-gate } 275*0Sstevel@tonic-gate else 276*0Sstevel@tonic-gate { 277*0Sstevel@tonic-gate if (c->slen <= 0) break; 278*0Sstevel@tonic-gate } 279*0Sstevel@tonic-gate 280*0Sstevel@tonic-gate c->q=c->p; 281*0Sstevel@tonic-gate if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass) 282*0Sstevel@tonic-gate == NULL) 283*0Sstevel@tonic-gate { 284*0Sstevel@tonic-gate c->error=ERR_R_ASN1_LIB; 285*0Sstevel@tonic-gate goto err; 286*0Sstevel@tonic-gate } 287*0Sstevel@tonic-gate 288*0Sstevel@tonic-gate if (!BUF_MEM_grow_clean(&b,num+os->length)) 289*0Sstevel@tonic-gate { 290*0Sstevel@tonic-gate c->error=ERR_R_BUF_LIB; 291*0Sstevel@tonic-gate goto err; 292*0Sstevel@tonic-gate } 293*0Sstevel@tonic-gate memcpy(&(b.data[num]),os->data,os->length); 294*0Sstevel@tonic-gate if (!(c->inf & 1)) 295*0Sstevel@tonic-gate c->slen-=(c->p-c->q); 296*0Sstevel@tonic-gate num+=os->length; 297*0Sstevel@tonic-gate } 298*0Sstevel@tonic-gate 299*0Sstevel@tonic-gate if (!asn1_Finish(c)) goto err; 300*0Sstevel@tonic-gate 301*0Sstevel@tonic-gate a->length=num; 302*0Sstevel@tonic-gate if (a->data != NULL) OPENSSL_free(a->data); 303*0Sstevel@tonic-gate a->data=(unsigned char *)b.data; 304*0Sstevel@tonic-gate if (os != NULL) ASN1_STRING_free(os); 305*0Sstevel@tonic-gate return(1); 306*0Sstevel@tonic-gate err: 307*0Sstevel@tonic-gate ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error); 308*0Sstevel@tonic-gate if (os != NULL) ASN1_STRING_free(os); 309*0Sstevel@tonic-gate if (b.data != NULL) OPENSSL_free(b.data); 310*0Sstevel@tonic-gate return(0); 311*0Sstevel@tonic-gate } 312*0Sstevel@tonic-gate 313