crypto/asn1/asn1_par.c

   1 /* crypto/asn1/asn1_par.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/buffer.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/x509.h>
  64
  65 static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
  66         int indent);
  67 static int asn1_parse2(BIO *bp, unsigned char **pp, long length,
  68         int offset, int depth, int indent);
  69 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
  70              int indent)
  71         {
  72         static const char fmt[]="%-18s";
  73         static const char fmt2[]="%2d %-15s";
  74         char str[128];
  75         const char *p,*p2=NULL;
  76
  77         if (constructed & V_ASN1_CONSTRUCTED)
  78                 p="cons: ";
  79         else
  80                 p="prim: ";
  81         if (BIO_write(bp,p,6) < 6) goto err;
  82         if (indent)
  83                 {
  84                 if (indent > 128) indent=128;
  85                 memset(str,' ',indent);
  86                 if (BIO_write(bp,str,indent) < indent) goto err;
  87                 }
  88
  89         p=str;
  90         if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
  91                 sprintf(str,"priv [ %d ] ",tag);
  92         else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
  93                 sprintf(str,"cont [ %d ]",tag);
  94         else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
  95                 sprintf(str,"appl [ %d ]",tag);
  96         else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */)
  97                 p="EOC";
  98         else if (tag == V_ASN1_BOOLEAN)
  99                 p="BOOLEAN";
 100         else if (tag == V_ASN1_INTEGER)
 101                 p="INTEGER";
 102         else if (tag == V_ASN1_ENUMERATED)
 103                 p="ENUMERATED";
 104         else if (tag == V_ASN1_BIT_STRING)
 105                 p="BIT STRING";
 106         else if (tag == V_ASN1_OCTET_STRING)
 107                 p="OCTET STRING";
 108         else if (tag == V_ASN1_NULL)
 109                 p="NULL";
 110         else if (tag == V_ASN1_OBJECT)
 111                 p="OBJECT";
 112         else if (tag == V_ASN1_SEQUENCE)
 113                 p="SEQUENCE";
 114         else if (tag == V_ASN1_SET)
 115                 p="SET";
 116         else if (tag == V_ASN1_PRINTABLESTRING)
 117                 p="PRINTABLESTRING";
 118         else if (tag == V_ASN1_T61STRING)
 119                 p="T61STRING";
 120         else if (tag == V_ASN1_IA5STRING)
 121                 p="IA5STRING";
 122         else if (tag == V_ASN1_UTCTIME)
 123                 p="UTCTIME";
 124
 125         /* extras */
 126         else if (tag == V_ASN1_NUMERICSTRING)
 127                 p="NUMERICSTRING";
 128         else if (tag == V_ASN1_VIDEOTEXSTRING)
 129                 p="VIDEOTEXSTRING";
 130         else if (tag == V_ASN1_GENERALIZEDTIME)
 131                 p="GENERALIZEDTIME";
 132         else if (tag == V_ASN1_GRAPHICSTRING)
 133                 p="GRAPHICSTRING";
 134         else if (tag == V_ASN1_VISIBLESTRING)
 135                 p="VISIBLESTRING";
 136         else if (tag == V_ASN1_GENERALSTRING)
 137                 p="GENERALSTRING";
 138         else if (tag == V_ASN1_UNIVERSALSTRING)
 139                 p="UNIVERSALSTRING";
 140         else if (tag == V_ASN1_BMPSTRING)
 141                 p="BMPSTRING";
 142         else
 143                 p2="(unknown)";
 144
 145         if (p2 != NULL)
 146                 {
 147                 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
 148                 }
 149         else
 150                 {
 151                 if (BIO_printf(bp,fmt,p) <= 0) goto err;
 152                 }
 153         return(1);
 154 err:
 155         return(0);
 156         }
 157
 158 int ASN1_parse(BIO *bp, unsigned char *pp, long len, int indent)
 159         {
 160         return(asn1_parse2(bp,&pp,len,0,0,indent));
 161         }
 162
 163 static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset,
 164              int depth, int indent)
 165         {
 166         unsigned char *p,*ep,*tot,*op,*opp;
 167         long len;
 168         int tag,xclass,ret=0;
 169         int nl,hl,j,r;
 170         ASN1_OBJECT *o=NULL;
 171         ASN1_OCTET_STRING *os=NULL;
 172         /* ASN1_BMPSTRING *bmp=NULL;*/
 173
 174         p= *pp;
 175         tot=p+length;
 176         op=p-1;
 177         while ((p < tot) && (op < p))
 178                 {
 179                 op=p;
 180                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 181 #ifdef LINT
 182                 j=j;
 183 #endif
 184                 if (j & 0x80)
 185                         {
 186                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 187                                 goto end;
 188                         ret=0;
 189                         goto end;
 190                         }
 191                 hl=(p-op);
 192                 length-=hl;
 193                 /* if j == 0x21 it is a constructed indefinite length object */
 194                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 195                         <= 0) goto end;
 196
 197                 if (j != (V_ASN1_CONSTRUCTED | 1))
 198                         {
 199                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 200                                 depth,(long)hl,len) <= 0)
 201                                 goto end;
 202                         }
 203                 else
 204                         {
 205                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 206                                 depth,(long)hl) <= 0)
 207                                 goto end;
 208                         }
 209                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 210                         goto end;
 211                 if (j & V_ASN1_CONSTRUCTED)
 212                         {
 213                         ep=p+len;
 214                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 215                         if (len > length)
 216                                 {
 217                                 BIO_printf(bp,
 218                                         "length is greater than %ld\n",length);
 219                                 ret=0;
 220                                 goto end;
 221                                 }
 222                         if ((j == 0x21) && (len == 0))
 223                                 {
 224                                 for (;;)
 225                                         {
 226                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 227                                                 offset+(p - *pp),depth+1,
 228                                                 indent);
 229                                         if (r == 0) { ret=0; goto end; }
 230                                         if ((r == 2) || (p >= tot)) break;
 231                                         }
 232                                 }
 233                         else
 234                                 while (p < ep)
 235                                         {
 236                                         r=asn1_parse2(bp,&p,(long)len,
 237                                                 offset+(p - *pp),depth+1,
 238                                                 indent);
 239                                         if (r == 0) { ret=0; goto end; }
 240                                         }
 241                         }
 242                 else if (xclass != 0)
 243                         {
 244                         p+=len;
 245                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 246                         }
 247                 else
 248                         {
 249                         nl=0;
 250                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 251                                 (tag == V_ASN1_T61STRING) ||
 252                                 (tag == V_ASN1_IA5STRING) ||
 253                                 (tag == V_ASN1_VISIBLESTRING) ||
 254                                 (tag == V_ASN1_UTCTIME) ||
 255                                 (tag == V_ASN1_GENERALIZEDTIME))
 256                                 {
 257                                 if (BIO_write(bp,":",1) <= 0) goto end;
 258                                 if ((len > 0) &&
 259                                         BIO_write(bp,(char *)p,(int)len)
 260                                         != (int)len)
 261                                         goto end;
 262                                 }
 263                         else if (tag == V_ASN1_OBJECT)
 264                                 {
 265                                 opp=op;
 266                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 267                                         {
 268                                         if (BIO_write(bp,":",1) <= 0) goto end;
 269                                         i2a_ASN1_OBJECT(bp,o);
 270                                         }
 271                                 else
 272                                         {
 273                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 274                                                 goto end;
 275                                         }
 276                                 }
 277                         else if (tag == V_ASN1_BOOLEAN)
 278                                 {
 279                                 int ii;
 280
 281                                 opp=op;
 282                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 283                                 if (ii < 0)
 284                                         {
 285                                         if (BIO_write(bp,"Bad boolean\n",12))
 286                                                 goto end;
 287                                         }
 288                                 BIO_printf(bp,":%d",ii);
 289                                 }
 290                         else if (tag == V_ASN1_BMPSTRING)
 291                                 {
 292                                 /* do the BMP thang */
 293                                 }
 294                         else if (tag == V_ASN1_OCTET_STRING)
 295                                 {
 296                                 int i,printable=1;
 297
 298                                 opp=op;
 299                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 300                                 if (os != NULL)
 301                                         {
 302                                         opp=os->data;
 303                                         for (i=0; i<os->length; i++)
 304                                                 {
 305                                                 if ((   (opp[i] < ' ') &&
 306                                                         (opp[i] != '\n') &&
 307                                                         (opp[i] != '\r') &&
 308                                                         (opp[i] != '\t')) ||
 309                                                         (opp[i] > '~'))
 310                                                         {
 311                                                         printable=0;
 312                                                         break;
 313                                                         }
 314                                                 }
 315                                         if (printable && (os->length > 0))
 316                                                 {
 317                                                 if (BIO_write(bp,":",1) <= 0)
 318                                                         goto end;
 319                                                 if (BIO_write(bp,(char *)opp,
 320                                                         os->length) <= 0)
 321                                                         goto end;
 322                                                 }
 323                                         ASN1_OCTET_STRING_free(os);
 324                                         os=NULL;
 325                                         }
 326                                 }
 327                         else if (tag == V_ASN1_INTEGER)
 328                                 {
 329                                 ASN1_INTEGER *bs;
 330                                 int i;
 331
 332                                 opp=op;
 333                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 334                                 if (bs != NULL)
 335                                         {
 336                                         if (BIO_write(bp,":",1) <= 0) goto end;
 337                                         if (bs->type == V_ASN1_NEG_INTEGER)
 338                                                 if (BIO_write(bp,"-",1) <= 0)
 339                                                         goto end;
 340                                         for (i=0; i<bs->length; i++)
 341                                                 {
 342                                                 if (BIO_printf(bp,"%02X",
 343                                                         bs->data[i]) <= 0)
 344                                                         goto end;
 345                                                 }
 346                                         if (bs->length == 0)
 347                                                 {
 348                                                 if (BIO_write(bp,"00",2) <= 0)
 349                                                         goto end;
 350                                                 }
 351                                         }
 352                                 else
 353                                         {
 354                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 355                                                 goto end;
 356                                         }
 357                                 ASN1_INTEGER_free(bs);
 358                                 }
 359                         else if (tag == V_ASN1_ENUMERATED)
 360                                 {
 361                                 ASN1_ENUMERATED *bs;
 362                                 int i;
 363
 364                                 opp=op;
 365                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 366                                 if (bs != NULL)
 367                                         {
 368                                         if (BIO_write(bp,":",1) <= 0) goto end;
 369                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 370                                                 if (BIO_write(bp,"-",1) <= 0)
 371                                                         goto end;
 372                                         for (i=0; i<bs->length; i++)
 373                                                 {
 374                                                 if (BIO_printf(bp,"%02X",
 375                                                         bs->data[i]) <= 0)
 376                                                         goto end;
 377                                                 }
 378                                         if (bs->length == 0)
 379                                                 {
 380                                                 if (BIO_write(bp,"00",2) <= 0)
 381                                                         goto end;
 382                                                 }
 383                                         }
 384                                 else
 385                                         {
 386                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 387                                                 goto end;
 388                                         }
 389                                 ASN1_ENUMERATED_free(bs);
 390                                 }
 391
 392                         if (!nl)
 393                                 {
 394                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 395                                 }
 396                         p+=len;
 397                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 398                                 {
 399                                 ret=2; /* End of sequence */
 400                                 goto end;
 401                                 }
 402                         }
 403                 length-=len;
 404                 }
 405         ret=1;
 406 end:
 407         if (o != NULL) ASN1_OBJECT_free(o);
 408         if (os != NULL) ASN1_OCTET_STRING_free(os);
 409         *pp=p;
 410         return(ret);
 411         }