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                 if (j & 0x80)
 137                         {
 138                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 139                                 goto end;
 140                         ret=0;
 141                         goto end;
 142                         }
 143                 hl=(p-op);
 144                 length-=hl;
 145                 /* if j == 0x21 it is a constructed indefinite length object */
 146                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 147                         <= 0) goto end;
 148
 149                 if (j != (V_ASN1_CONSTRUCTED | 1))
 150                         {
 151                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 152                                 depth,(long)hl,len) <= 0)
 153                                 goto end;
 154                         }
 155                 else
 156                         {
 157                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 158                                 depth,(long)hl) <= 0)
 159                                 goto end;
 160                         }
 161                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 162                         goto end;
 163                 if (j & V_ASN1_CONSTRUCTED)
 164                         {
 165                         ep=p+len;
 166                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 167                         if (len > length)
 168                                 {
 169                                 BIO_printf(bp,
 170                                         "length is greater than %ld\n",length);
 171                                 ret=0;
 172                                 goto end;
 173                                 }
 174                         if ((j == 0x21) && (len == 0))
 175                                 {
 176                                 for (;;)
 177                                         {
 178                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 179                                                 offset+(p - *pp),depth+1,
 180                                                 indent,dump);
 181                                         if (r == 0) { ret=0; goto end; }
 182                                         if ((r == 2) || (p >= tot)) break;
 183                                         }
 184                                 }
 185                         else
 186                                 while (p < ep)
 187                                         {
 188                                         r=asn1_parse2(bp,&p,(long)len,
 189                                                 offset+(p - *pp),depth+1,
 190                                                 indent,dump);
 191                                         if (r == 0) { ret=0; goto end; }
 192                                         }
 193                         }
 194                 else if (xclass != 0)
 195                         {
 196                         p+=len;
 197                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 198                         }
 199                 else
 200                         {
 201                         nl=0;
 202                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 203                                 (tag == V_ASN1_T61STRING) ||
 204                                 (tag == V_ASN1_IA5STRING) ||
 205                                 (tag == V_ASN1_VISIBLESTRING) ||
 206                                 (tag == V_ASN1_NUMERICSTRING) ||
 207                                 (tag == V_ASN1_UTF8STRING) ||
 208                                 (tag == V_ASN1_UTCTIME) ||
 209                                 (tag == V_ASN1_GENERALIZEDTIME))
 210                                 {
 211                                 if (BIO_write(bp,":",1) <= 0) goto end;
 212                                 if ((len > 0) &&
 213                                         BIO_write(bp,(const char *)p,(int)len)
 214                                         != (int)len)
 215                                         goto end;
 216                                 }
 217                         else if (tag == V_ASN1_OBJECT)
 218                                 {
 219                                 opp=op;
 220                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 221                                         {
 222                                         if (BIO_write(bp,":",1) <= 0) goto end;
 223                                         i2a_ASN1_OBJECT(bp,o);
 224                                         }
 225                                 else
 226                                         {
 227                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 228                                                 goto end;
 229                                         }
 230                                 }
 231                         else if (tag == V_ASN1_BOOLEAN)
 232                                 {
 233                                 int ii;
 234
 235                                 opp=op;
 236                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 237                                 if (ii < 0)
 238                                         {
 239                                         if (BIO_write(bp,"Bad boolean\n",12) <= 0)
 240                                                 goto end;
 241                                         }
 242                                 BIO_printf(bp,":%d",ii);
 243                                 }
 244                         else if (tag == V_ASN1_BMPSTRING)
 245                                 {
 246                                 /* do the BMP thang */
 247                                 }
 248                         else if (tag == V_ASN1_OCTET_STRING)
 249                                 {
 250                                 int i,printable=1;
 251
 252                                 opp=op;
 253                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 254                                 if (os != NULL && os->length > 0)
 255                                         {
 256                                         opp = os->data;
 257                                         /* testing whether the octet string is
 258                                          * printable */
 259                                         for (i=0; i<os->length; i++)
 260                                                 {
 261                                                 if ((   (opp[i] < ' ') &&
 262                                                         (opp[i] != '\n') &&
 263                                                         (opp[i] != '\r') &&
 264                                                         (opp[i] != '\t')) ||
 265                                                         (opp[i] > '~'))
 266                                                         {
 267                                                         printable=0;
 268                                                         break;
 269                                                         }
 270                                                 }
 271                                         if (printable)
 272                                         /* printable string */
 273                                                 {
 274                                                 if (BIO_write(bp,":",1) <= 0)
 275                                                         goto end;
 276                                                 if (BIO_write(bp,(const char *)opp,
 277                                                         os->length) <= 0)
 278                                                         goto end;
 279                                                 }
 280                                         else if (!dump)
 281                                         /* not printable => print octet string
 282                                          * as hex dump */
 283                                                 {
 284                                                 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
 285                                                         goto end;
 286                                                 for (i=0; i<os->length; i++)
 287                                                         {
 288                                                         if (BIO_printf(bp,"%02X"
 289                                                                 , opp[i]) <= 0)
 290                                                                 goto end;
 291                                                         }
 292                                                 }
 293                                         else
 294                                         /* print the normal dump */
 295                                                 {
 296                                                 if (!nl)
 297                                                         {
 298                                                         if (BIO_write(bp,"\n",1) <= 0)
 299                                                                 goto end;
 300                                                         }
 301                                                 if (BIO_dump_indent(bp,
 302                                                         (const char *)opp,
 303                                                         ((dump == -1 || dump >
 304                                                         os->length)?os->length:dump),
 305                                                         dump_indent) <= 0)
 306                                                         goto end;
 307                                                 nl=1;
 308                                                 }
 309                                         }
 310                                 if (os != NULL)
 311                                         {
 312                                         M_ASN1_OCTET_STRING_free(os);
 313                                         os=NULL;
 314                                         }
 315                                 }
 316                         else if (tag == V_ASN1_INTEGER)
 317                                 {
 318                                 ASN1_INTEGER *bs;
 319                                 int i;
 320
 321                                 opp=op;
 322                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 323                                 if (bs != NULL)
 324                                         {
 325                                         if (BIO_write(bp,":",1) <= 0) goto end;
 326                                         if (bs->type == V_ASN1_NEG_INTEGER)
 327                                                 if (BIO_write(bp,"-",1) <= 0)
 328                                                         goto end;
 329                                         for (i=0; i<bs->length; i++)
 330                                                 {
 331                                                 if (BIO_printf(bp,"%02X",
 332                                                         bs->data[i]) <= 0)
 333                                                         goto end;
 334                                                 }
 335                                         if (bs->length == 0)
 336                                                 {
 337                                                 if (BIO_write(bp,"00",2) <= 0)
 338                                                         goto end;
 339                                                 }
 340                                         }
 341                                 else
 342                                         {
 343                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 344                                                 goto end;
 345                                         }
 346                                 M_ASN1_INTEGER_free(bs);
 347                                 }
 348                         else if (tag == V_ASN1_ENUMERATED)
 349                                 {
 350                                 ASN1_ENUMERATED *bs;
 351                                 int i;
 352
 353                                 opp=op;
 354                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 355                                 if (bs != NULL)
 356                                         {
 357                                         if (BIO_write(bp,":",1) <= 0) goto end;
 358                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 359                                                 if (BIO_write(bp,"-",1) <= 0)
 360                                                         goto end;
 361                                         for (i=0; i<bs->length; i++)
 362                                                 {
 363                                                 if (BIO_printf(bp,"%02X",
 364                                                         bs->data[i]) <= 0)
 365                                                         goto end;
 366                                                 }
 367                                         if (bs->length == 0)
 368                                                 {
 369                                                 if (BIO_write(bp,"00",2) <= 0)
 370                                                         goto end;
 371                                                 }
 372                                         }
 373                                 else
 374                                         {
 375                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 376                                                 goto end;
 377                                         }
 378                                 M_ASN1_ENUMERATED_free(bs);
 379                                 }
 380                         else if (len > 0 && dump)
 381                                 {
 382                                 if (!nl)
 383                                         {
 384                                         if (BIO_write(bp,"\n",1) <= 0)
 385                                                 goto end;
 386                                         }
 387                                 if (BIO_dump_indent(bp,(const char *)p,
 388                                         ((dump == -1 || dump > len)?len:dump),
 389                                         dump_indent) <= 0)
 390                                         goto end;
 391                                 nl=1;
 392                                 }
 393
 394                         if (!nl)
 395                                 {
 396                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 397                                 }
 398                         p+=len;
 399                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 400                                 {
 401                                 ret=2; /* End of sequence */
 402                                 goto end;
 403                                 }
 404                         }
 405                 length-=len;
 406                 }
 407         ret=1;
 408 end:
 409         if (o != NULL) ASN1_OBJECT_free(o);
 410         if (os != NULL) M_ASN1_OCTET_STRING_free(os);
 411         *pp=p;
 412         return(ret);
 413         }
 414
 415 const char *ASN1_tag2str(int tag)
 416 {
 417         static const char * const tag2str[] = {
 418         /* 0-4 */
 419          "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
 420         /* 5-9 */
 421          "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
 422         /* 10-13 */
 423          "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
 424         /* 15-17 */
 425         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
 426         /* 18-20 */
 427         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
 428         /* 21-24 */
 429         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME",
 430         /* 25-27 */
 431         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
 432         /* 28-30 */
 433         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
 434         };
 435
 436         if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
 437                                                         tag &= ~0x100;
 438
 439         if(tag < 0 || tag > 30) return "(unknown)";
 440         return tag2str[tag];
 441 }
 442