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         char str[128];
  74         const char *p;
  75
  76         if (constructed & V_ASN1_CONSTRUCTED)
  77                 p="cons: ";
  78         else
  79                 p="prim: ";
  80         if (BIO_write(bp,p,6) < 6) goto err;
  81         BIO_indent(bp,indent,128);
  82
  83         p=str;
  84         if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
  85                 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag);
  86         else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
  87                 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag);
  88         else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
  89                 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag);
  90         else if (tag > 30)
  91                 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag);
  92         else
  93                 p = ASN1_tag2str(tag);
  94
  95         if (BIO_printf(bp,fmt,p) <= 0)
  96                 goto err;
  97         return(1);
  98 err:
  99         return(0);
 100         }
 101
 102 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
 103         {
 104         return(asn1_parse2(bp,&pp,len,0,0,indent,0));
 105         }
 106
 107 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
 108         {
 109         return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
 110         }
 111
 112 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
 113              int depth, int indent, int dump)
 114         {
 115         const unsigned char *p,*ep,*tot,*op,*opp;
 116         long len;
 117         int tag,xclass,ret=0;
 118         int nl,hl,j,r;
 119         ASN1_OBJECT *o=NULL;
 120         ASN1_OCTET_STRING *os=NULL;
 121         /* ASN1_BMPSTRING *bmp=NULL;*/
 122         int dump_indent;
 123
 124 #if 0
 125         dump_indent = indent;
 126 #else
 127         dump_indent = 6;        /* Because we know BIO_dump_indent() */
 128 #endif
 129         p= *pp;
 130         tot=p+length;
 131         op=p-1;
 132         while ((p < tot) && (op < p))
 133                 {
 134                 op=p;
 135                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 136 #ifdef LINT
 137                 j=j;
 138 #endif
 139                 if (j & 0x80)
 140                         {
 141                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 142                                 goto end;
 143                         ret=0;
 144                         goto end;
 145                         }
 146                 hl=(p-op);
 147                 length-=hl;
 148                 /* if j == 0x21 it is a constructed indefinite length object */
 149                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 150                         <= 0) goto end;
 151
 152                 if (j != (V_ASN1_CONSTRUCTED | 1))
 153                         {
 154                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 155                                 depth,(long)hl,len) <= 0)
 156                                 goto end;
 157                         }
 158                 else
 159                         {
 160                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 161                                 depth,(long)hl) <= 0)
 162                                 goto end;
 163                         }
 164                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 165                         goto end;
 166                 if (j & V_ASN1_CONSTRUCTED)
 167                         {
 168                         ep=p+len;
 169                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 170                         if (len > length)
 171                                 {
 172                                 BIO_printf(bp,
 173                                         "length is greater than %ld\n",length);
 174                                 ret=0;
 175                                 goto end;
 176                                 }
 177                         if ((j == 0x21) && (len == 0))
 178                                 {
 179                                 for (;;)
 180                                         {
 181                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 182                                                 offset+(p - *pp),depth+1,
 183                                                 indent,dump);
 184                                         if (r == 0) { ret=0; goto end; }
 185                                         if ((r == 2) || (p >= tot)) break;
 186                                         }
 187                                 }
 188                         else
 189                                 while (p < ep)
 190                                         {
 191                                         r=asn1_parse2(bp,&p,(long)len,
 192                                                 offset+(p - *pp),depth+1,
 193                                                 indent,dump);
 194                                         if (r == 0) { ret=0; goto end; }
 195                                         }
 196                         }
 197                 else if (xclass != 0)
 198                         {
 199                         p+=len;
 200                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 201                         }
 202                 else
 203                         {
 204                         nl=0;
 205                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 206                                 (tag == V_ASN1_T61STRING) ||
 207                                 (tag == V_ASN1_IA5STRING) ||
 208                                 (tag == V_ASN1_VISIBLESTRING) ||
 209                                 (tag == V_ASN1_NUMERICSTRING) ||
 210                                 (tag == V_ASN1_UTF8STRING) ||
 211                                 (tag == V_ASN1_UTCTIME) ||
 212                                 (tag == V_ASN1_GENERALIZEDTIME))
 213                                 {
 214                                 if (BIO_write(bp,":",1) <= 0) goto end;
 215                                 if ((len > 0) &&
 216                                         BIO_write(bp,(const char *)p,(int)len)
 217                                         != (int)len)
 218                                         goto end;
 219                                 }
 220                         else if (tag == V_ASN1_OBJECT)
 221                                 {
 222                                 opp=op;
 223                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 224                                         {
 225                                         if (BIO_write(bp,":",1) <= 0) goto end;
 226                                         i2a_ASN1_OBJECT(bp,o);
 227                                         }
 228                                 else
 229                                         {
 230                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 231                                                 goto end;
 232                                         }
 233                                 }
 234                         else if (tag == V_ASN1_BOOLEAN)
 235                                 {
 236                                 int ii;
 237
 238                                 opp=op;
 239                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 240                                 if (ii < 0)
 241                                         {
 242                                         if (BIO_write(bp,"Bad boolean\n",12))
 243                                                 goto end;
 244                                         }
 245                                 BIO_printf(bp,":%d",ii);
 246                                 }
 247                         else if (tag == V_ASN1_BMPSTRING)
 248                                 {
 249                                 /* do the BMP thang */
 250                                 }
 251                         else if (tag == V_ASN1_OCTET_STRING)
 252                                 {
 253                                 int i,printable=1;
 254
 255                                 opp=op;
 256                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 257                                 if (os != NULL && os->length > 0)
 258                                         {
 259                                         opp = os->data;
 260                                         /* testing whether the octet string is
 261                                          * printable */
 262                                         for (i=0; i<os->length; i++)
 263                                                 {
 264                                                 if ((   (opp[i] < ' ') &&
 265                                                         (opp[i] != '\n') &&
 266                                                         (opp[i] != '\r') &&
 267                                                         (opp[i] != '\t')) ||
 268                                                         (opp[i] > '~'))
 269                                                         {
 270                                                         printable=0;
 271                                                         break;
 272                                                         }
 273                                                 }
 274                                         if (printable)
 275                                         /* printable string */
 276                                                 {
 277                                                 if (BIO_write(bp,":",1) <= 0)
 278                                                         goto end;
 279                                                 if (BIO_write(bp,(const char *)opp,
 280                                                         os->length) <= 0)
 281                                                         goto end;
 282                                                 }
 283                                         else if (!dump)
 284                                         /* not printable => print octet string
 285                                          * as hex dump */
 286                                                 {
 287                                                 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
 288                                                         goto end;
 289                                                 for (i=0; i<os->length; i++)
 290                                                         {
 291                                                         if (BIO_printf(bp,"%02X"
 292                                                                 , opp[i]) <= 0)
 293                                                                 goto end;
 294                                                         }
 295                                                 }
 296                                         else
 297                                         /* print the normal dump */
 298                                                 {
 299                                                 if (!nl)
 300                                                         {
 301                                                         if (BIO_write(bp,"\n",1) <= 0)
 302                                                                 goto end;
 303                                                         }
 304                                                 if (BIO_dump_indent(bp,
 305                                                         (const char *)opp,
 306                                                         ((dump == -1 || dump >
 307                                                         os->length)?os->length:dump),
 308                                                         dump_indent) <= 0)
 309                                                         goto end;
 310                                                 nl=1;
 311                                                 }
 312                                         }
 313                                 if (os != NULL)
 314                                         {
 315                                         M_ASN1_OCTET_STRING_free(os);
 316                                         os=NULL;
 317                                         }
 318                                 }
 319                         else if (tag == V_ASN1_INTEGER)
 320                                 {
 321                                 ASN1_INTEGER *bs;
 322                                 int i;
 323
 324                                 opp=op;
 325                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 326                                 if (bs != NULL)
 327                                         {
 328                                         if (BIO_write(bp,":",1) <= 0) goto end;
 329                                         if (bs->type == V_ASN1_NEG_INTEGER)
 330                                                 if (BIO_write(bp,"-",1) <= 0)
 331                                                         goto end;
 332                                         for (i=0; i<bs->length; i++)
 333                                                 {
 334                                                 if (BIO_printf(bp,"%02X",
 335                                                         bs->data[i]) <= 0)
 336                                                         goto end;
 337                                                 }
 338                                         if (bs->length == 0)
 339                                                 {
 340                                                 if (BIO_write(bp,"00",2) <= 0)
 341                                                         goto end;
 342                                                 }
 343                                         }
 344                                 else
 345                                         {
 346                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 347                                                 goto end;
 348                                         }
 349                                 M_ASN1_INTEGER_free(bs);
 350                                 }
 351                         else if (tag == V_ASN1_ENUMERATED)
 352                                 {
 353                                 ASN1_ENUMERATED *bs;
 354                                 int i;
 355
 356                                 opp=op;
 357                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 358                                 if (bs != NULL)
 359                                         {
 360                                         if (BIO_write(bp,":",1) <= 0) goto end;
 361                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 362                                                 if (BIO_write(bp,"-",1) <= 0)
 363                                                         goto end;
 364                                         for (i=0; i<bs->length; i++)
 365                                                 {
 366                                                 if (BIO_printf(bp,"%02X",
 367                                                         bs->data[i]) <= 0)
 368                                                         goto end;
 369                                                 }
 370                                         if (bs->length == 0)
 371                                                 {
 372                                                 if (BIO_write(bp,"00",2) <= 0)
 373                                                         goto end;
 374                                                 }
 375                                         }
 376                                 else
 377                                         {
 378                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 379                                                 goto end;
 380                                         }
 381                                 M_ASN1_ENUMERATED_free(bs);
 382                                 }
 383                         else if (len > 0 && dump)
 384                                 {
 385                                 if (!nl)
 386                                         {
 387                                         if (BIO_write(bp,"\n",1) <= 0)
 388                                                 goto end;
 389                                         }
 390                                 if (BIO_dump_indent(bp,(const char *)p,
 391                                         ((dump == -1 || dump > len)?len:dump),
 392                                         dump_indent) <= 0)
 393                                         goto end;
 394                                 nl=1;
 395                                 }
 396
 397                         if (!nl)
 398                                 {
 399                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 400                                 }
 401                         p+=len;
 402                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 403                                 {
 404                                 ret=2; /* End of sequence */
 405                                 goto end;
 406                                 }
 407                         }
 408                 length-=len;
 409                 }
 410         ret=1;
 411 end:
 412         if (o != NULL) ASN1_OBJECT_free(o);
 413         if (os != NULL) M_ASN1_OCTET_STRING_free(os);
 414         *pp=p;
 415         return(ret);
 416         }
 417
 418 const char *ASN1_tag2str(int tag)
 419 {
 420         static const char * const tag2str[] = {
 421          "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
 422          "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
 423          "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",      /* 10-13 */
 424         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",                /* 15-17 */
 425         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",            /* 18-20 */
 426         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
 427         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",          /* 25-27 */
 428         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"                 /* 28-30 */
 429         };
 430
 431         if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
 432                                                         tag &= ~0x100;
 433
 434         if(tag < 0 || tag > 30) return "(unknown)";
 435         return tag2str[tag];
 436 }
 437