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