crypto/openssl-0.9/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/asn1.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, const unsigned char **pp, long length,
  68         int offset, int depth, int indent, int dump);
  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         BIO_indent(bp,indent,128);
  83
  84         p=str;
  85         if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
  86                 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag);
  87         else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
  88                 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag);
  89         else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
  90                 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag);
  91         else p = ASN1_tag2str(tag);
  92
  93         if (p2 != NULL)
  94                 {
  95                 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
  96                 }
  97         else
  98                 {
  99                 if (BIO_printf(bp,fmt,p) <= 0) goto err;
 100                 }
 101         return(1);
 102 err:
 103         return(0);
 104         }
 105
 106 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
 107         {
 108         return(asn1_parse2(bp,&pp,len,0,0,indent,0));
 109         }
 110
 111 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
 112         {
 113         return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
 114         }
 115
 116 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
 117              int depth, int indent, int dump)
 118         {
 119         const unsigned char *p,*ep,*tot,*op,*opp;
 120         long len;
 121         int tag,xclass,ret=0;
 122         int nl,hl,j,r;
 123         ASN1_OBJECT *o=NULL;
 124         ASN1_OCTET_STRING *os=NULL;
 125         /* ASN1_BMPSTRING *bmp=NULL;*/
 126         int dump_indent;
 127
 128 #if 0
 129         dump_indent = indent;
 130 #else
 131         dump_indent = 6;        /* Because we know BIO_dump_indent() */
 132 #endif
 133         p= *pp;
 134         tot=p+length;
 135         op=p-1;
 136         while ((p < tot) && (op < p))
 137                 {
 138                 op=p;
 139                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 140 #ifdef LINT
 141                 j=j;
 142 #endif
 143                 if (j & 0x80)
 144                         {
 145                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 146                                 goto end;
 147                         ret=0;
 148                         goto end;
 149                         }
 150                 hl=(p-op);
 151                 length-=hl;
 152                 /* if j == 0x21 it is a constructed indefinite length object */
 153                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 154                         <= 0) goto end;
 155
 156                 if (j != (V_ASN1_CONSTRUCTED | 1))
 157                         {
 158                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 159                                 depth,(long)hl,len) <= 0)
 160                                 goto end;
 161                         }
 162                 else
 163                         {
 164                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 165                                 depth,(long)hl) <= 0)
 166                                 goto end;
 167                         }
 168                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 169                         goto end;
 170                 if (j & V_ASN1_CONSTRUCTED)
 171                         {
 172                         ep=p+len;
 173                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 174                         if (len > length)
 175                                 {
 176                                 BIO_printf(bp,
 177                                         "length is greater than %ld\n",length);
 178                                 ret=0;
 179                                 goto end;
 180                                 }
 181                         if ((j == 0x21) && (len == 0))
 182                                 {
 183                                 for (;;)
 184                                         {
 185                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 186                                                 offset+(p - *pp),depth+1,
 187                                                 indent,dump);
 188                                         if (r == 0) { ret=0; goto end; }
 189                                         if ((r == 2) || (p >= tot)) break;
 190                                         }
 191                                 }
 192                         else
 193                                 while (p < ep)
 194                                         {
 195                                         r=asn1_parse2(bp,&p,(long)len,
 196                                                 offset+(p - *pp),depth+1,
 197                                                 indent,dump);
 198                                         if (r == 0) { ret=0; goto end; }
 199                                         }
 200                         }
 201                 else if (xclass != 0)
 202                         {
 203                         p+=len;
 204                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 205                         }
 206                 else
 207                         {
 208                         nl=0;
 209                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 210                                 (tag == V_ASN1_T61STRING) ||
 211                                 (tag == V_ASN1_IA5STRING) ||
 212                                 (tag == V_ASN1_VISIBLESTRING) ||
 213                                 (tag == V_ASN1_UTCTIME) ||
 214                                 (tag == V_ASN1_GENERALIZEDTIME))
 215                                 {
 216                                 if (BIO_write(bp,":",1) <= 0) goto end;
 217                                 if ((len > 0) &&
 218                                         BIO_write(bp,(const char *)p,(int)len)
 219                                         != (int)len)
 220                                         goto end;
 221                                 }
 222                         else if (tag == V_ASN1_OBJECT)
 223                                 {
 224                                 opp=op;
 225                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 226                                         {
 227                                         if (BIO_write(bp,":",1) <= 0) goto end;
 228                                         i2a_ASN1_OBJECT(bp,o);
 229                                         }
 230                                 else
 231                                         {
 232                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 233                                                 goto end;
 234                                         }
 235                                 }
 236                         else if (tag == V_ASN1_BOOLEAN)
 237                                 {
 238                                 int ii;
 239
 240                                 opp=op;
 241                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 242                                 if (ii < 0)
 243                                         {
 244                                         if (BIO_write(bp,"Bad boolean\n",12))
 245                                                 goto end;
 246                                         }
 247                                 BIO_printf(bp,":%d",ii);
 248                                 }
 249                         else if (tag == V_ASN1_BMPSTRING)
 250                                 {
 251                                 /* do the BMP thang */
 252                                 }
 253                         else if (tag == V_ASN1_OCTET_STRING)
 254                                 {
 255                                 int i,printable=1;
 256
 257                                 opp=op;
 258                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 259                                 if (os != NULL && os->length > 0)
 260                                         {
 261                                         opp = os->data;
 262                                         /* testing whether the octet string is
 263                                          * printable */
 264                                         for (i=0; i<os->length; i++)
 265                                                 {
 266                                                 if ((   (opp[i] < ' ') &&
 267                                                         (opp[i] != '\n') &&
 268                                                         (opp[i] != '\r') &&
 269                                                         (opp[i] != '\t')) ||
 270                                                         (opp[i] > '~'))
 271                                                         {
 272                                                         printable=0;
 273                                                         break;
 274                                                         }
 275                                                 }
 276                                         if (printable)
 277                                         /* printable string */
 278                                                 {
 279                                                 if (BIO_write(bp,":",1) <= 0)
 280                                                         goto end;
 281                                                 if (BIO_write(bp,(const char *)opp,
 282                                                         os->length) <= 0)
 283                                                         goto end;
 284                                                 }
 285                                         else if (!dump)
 286                                         /* not printable => print octet string
 287                                          * as hex dump */
 288                                                 {
 289                                                 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
 290                                                         goto end;
 291                                                 for (i=0; i<os->length; i++)
 292                                                         {
 293                                                         if (BIO_printf(bp,"%02X"
 294                                                                 , opp[i]) <= 0)
 295                                                                 goto end;
 296                                                         }
 297                                                 }
 298                                         else
 299                                         /* print the normal dump */
 300                                                 {
 301                                                 if (!nl)
 302                                                         {
 303                                                         if (BIO_write(bp,"\n",1) <= 0)
 304                                                                 goto end;
 305                                                         }
 306                                                 if (BIO_dump_indent(bp,
 307                                                         (const char *)opp,
 308                                                         ((dump == -1 || dump >
 309                                                         os->length)?os->length:dump),
 310                                                         dump_indent) <= 0)
 311                                                         goto end;
 312                                                 nl=1;
 313                                                 }
 314                                         }
 315                                 if (os != NULL)
 316                                         {
 317                                         M_ASN1_OCTET_STRING_free(os);
 318                                         os=NULL;
 319                                         }
 320                                 }
 321                         else if (tag == V_ASN1_INTEGER)
 322                                 {
 323                                 ASN1_INTEGER *bs;
 324                                 int i;
 325
 326                                 opp=op;
 327                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 328                                 if (bs != NULL)
 329                                         {
 330                                         if (BIO_write(bp,":",1) <= 0) goto end;
 331                                         if (bs->type == V_ASN1_NEG_INTEGER)
 332                                                 if (BIO_write(bp,"-",1) <= 0)
 333                                                         goto end;
 334                                         for (i=0; i<bs->length; i++)
 335                                                 {
 336                                                 if (BIO_printf(bp,"%02X",
 337                                                         bs->data[i]) <= 0)
 338                                                         goto end;
 339                                                 }
 340                                         if (bs->length == 0)
 341                                                 {
 342                                                 if (BIO_write(bp,"00",2) <= 0)
 343                                                         goto end;
 344                                                 }
 345                                         }
 346                                 else
 347                                         {
 348                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 349                                                 goto end;
 350                                         }
 351                                 M_ASN1_INTEGER_free(bs);
 352                                 }
 353                         else if (tag == V_ASN1_ENUMERATED)
 354                                 {
 355                                 ASN1_ENUMERATED *bs;
 356                                 int i;
 357
 358                                 opp=op;
 359                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 360                                 if (bs != NULL)
 361                                         {
 362                                         if (BIO_write(bp,":",1) <= 0) goto end;
 363                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 364                                                 if (BIO_write(bp,"-",1) <= 0)
 365                                                         goto end;
 366                                         for (i=0; i<bs->length; i++)
 367                                                 {
 368                                                 if (BIO_printf(bp,"%02X",
 369                                                         bs->data[i]) <= 0)
 370                                                         goto end;
 371                                                 }
 372                                         if (bs->length == 0)
 373                                                 {
 374                                                 if (BIO_write(bp,"00",2) <= 0)
 375                                                         goto end;
 376                                                 }
 377                                         }
 378                                 else
 379                                         {
 380                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 381                                                 goto end;
 382                                         }
 383                                 M_ASN1_ENUMERATED_free(bs);
 384                                 }
 385                         else if (len > 0 && dump)
 386                                 {
 387                                 if (!nl)
 388                                         {
 389                                         if (BIO_write(bp,"\n",1) <= 0)
 390                                                 goto end;
 391                                         }
 392                                 if (BIO_dump_indent(bp,(const char *)p,
 393                                         ((dump == -1 || dump > len)?len:dump),
 394                                         dump_indent) <= 0)
 395                                         goto end;
 396                                 nl=1;
 397                                 }
 398
 399                         if (!nl)
 400                                 {
 401                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 402                                 }
 403                         p+=len;
 404                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 405                                 {
 406                                 ret=2; /* End of sequence */
 407                                 goto end;
 408                                 }
 409                         }
 410                 length-=len;
 411                 }
 412         ret=1;
 413 end:
 414         if (o != NULL) ASN1_OBJECT_free(o);
 415         if (os != NULL) M_ASN1_OCTET_STRING_free(os);
 416         *pp=p;
 417         return(ret);
 418         }
 419
 420 const char *ASN1_tag2str(int tag)
 421 {
 422         const static char *tag2str[] = {
 423          "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
 424          "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
 425          "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",      /* 10-13 */
 426         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",                /* 15-17 */
 427         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",            /* 18-20 */
 428         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
 429         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",          /* 25-27 */
 430         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"                 /* 28-30 */
 431         };
 432
 433         if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
 434                                                         tag &= ~0x100;
 435
 436         if(tag < 0 || tag > 30) return "(unknown)";
 437         return tag2str[tag];
 438 }
 439