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);
  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));
 114         }
 115
 116 static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset,
 117              int depth, int indent)
 118         {
 119         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
 127         p= *pp;
 128         tot=p+length;
 129         op=p-1;
 130         while ((p < tot) && (op < p))
 131                 {
 132                 op=p;
 133                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 134 #ifdef LINT
 135                 j=j;
 136 #endif
 137                 if (j & 0x80)
 138                         {
 139                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 140                                 goto end;
 141                         ret=0;
 142                         goto end;
 143                         }
 144                 hl=(p-op);
 145                 length-=hl;
 146                 /* if j == 0x21 it is a constructed indefinite length object */
 147                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 148                         <= 0) goto end;
 149
 150                 if (j != (V_ASN1_CONSTRUCTED | 1))
 151                         {
 152                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 153                                 depth,(long)hl,len) <= 0)
 154                                 goto end;
 155                         }
 156                 else
 157                         {
 158                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 159                                 depth,(long)hl) <= 0)
 160                                 goto end;
 161                         }
 162                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 163                         goto end;
 164                 if (j & V_ASN1_CONSTRUCTED)
 165                         {
 166                         ep=p+len;
 167                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 168                         if (len > length)
 169                                 {
 170                                 BIO_printf(bp,
 171                                         "length is greater than %ld\n",length);
 172                                 ret=0;
 173                                 goto end;
 174                                 }
 175                         if ((j == 0x21) && (len == 0))
 176                                 {
 177                                 for (;;)
 178                                         {
 179                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 180                                                 offset+(p - *pp),depth+1,
 181                                                 indent);
 182                                         if (r == 0) { ret=0; goto end; }
 183                                         if ((r == 2) || (p >= tot)) break;
 184                                         }
 185                                 }
 186                         else
 187                                 while (p < ep)
 188                                         {
 189                                         r=asn1_parse2(bp,&p,(long)len,
 190                                                 offset+(p - *pp),depth+1,
 191                                                 indent);
 192                                         if (r == 0) { ret=0; goto end; }
 193                                         }
 194                         }
 195                 else if (xclass != 0)
 196                         {
 197                         p+=len;
 198                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 199                         }
 200                 else
 201                         {
 202                         nl=0;
 203                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 204                                 (tag == V_ASN1_T61STRING) ||
 205                                 (tag == V_ASN1_IA5STRING) ||
 206                                 (tag == V_ASN1_VISIBLESTRING) ||
 207                                 (tag == V_ASN1_UTCTIME) ||
 208                                 (tag == V_ASN1_GENERALIZEDTIME))
 209                                 {
 210                                 if (BIO_write(bp,":",1) <= 0) goto end;
 211                                 if ((len > 0) &&
 212                                         BIO_write(bp,(char *)p,(int)len)
 213                                         != (int)len)
 214                                         goto end;
 215                                 }
 216                         else if (tag == V_ASN1_OBJECT)
 217                                 {
 218                                 opp=op;
 219                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 220                                         {
 221                                         if (BIO_write(bp,":",1) <= 0) goto end;
 222                                         i2a_ASN1_OBJECT(bp,o);
 223                                         }
 224                                 else
 225                                         {
 226                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 227                                                 goto end;
 228                                         }
 229                                 }
 230                         else if (tag == V_ASN1_BOOLEAN)
 231                                 {
 232                                 int ii;
 233
 234                                 opp=op;
 235                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 236                                 if (ii < 0)
 237                                         {
 238                                         if (BIO_write(bp,"Bad boolean\n",12))
 239                                                 goto end;
 240                                         }
 241                                 BIO_printf(bp,":%d",ii);
 242                                 }
 243                         else if (tag == V_ASN1_BMPSTRING)
 244                                 {
 245                                 /* do the BMP thang */
 246                                 }
 247                         else if (tag == V_ASN1_OCTET_STRING)
 248                                 {
 249                                 int i,printable=1;
 250
 251                                 opp=op;
 252                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 253                                 if (os != NULL)
 254                                         {
 255                                         opp=os->data;
 256                                         for (i=0; i<os->length; i++)
 257                                                 {
 258                                                 if ((   (opp[i] < ' ') &&
 259                                                         (opp[i] != '\n') &&
 260                                                         (opp[i] != '\r') &&
 261                                                         (opp[i] != '\t')) ||
 262                                                         (opp[i] > '~'))
 263                                                         {
 264                                                         printable=0;
 265                                                         break;
 266                                                         }
 267                                                 }
 268                                         if (printable && (os->length > 0))
 269                                                 {
 270                                                 if (BIO_write(bp,":",1) <= 0)
 271                                                         goto end;
 272                                                 if (BIO_write(bp,(char *)opp,
 273                                                         os->length) <= 0)
 274                                                         goto end;
 275                                                 }
 276                                         ASN1_OCTET_STRING_free(os);
 277                                         os=NULL;
 278                                         }
 279                                 }
 280                         else if (tag == V_ASN1_INTEGER)
 281                                 {
 282                                 ASN1_INTEGER *bs;
 283                                 int i;
 284
 285                                 opp=op;
 286                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 287                                 if (bs != NULL)
 288                                         {
 289                                         if (BIO_write(bp,":",1) <= 0) goto end;
 290                                         if (bs->type == V_ASN1_NEG_INTEGER)
 291                                                 if (BIO_write(bp,"-",1) <= 0)
 292                                                         goto end;
 293                                         for (i=0; i<bs->length; i++)
 294                                                 {
 295                                                 if (BIO_printf(bp,"%02X",
 296                                                         bs->data[i]) <= 0)
 297                                                         goto end;
 298                                                 }
 299                                         if (bs->length == 0)
 300                                                 {
 301                                                 if (BIO_write(bp,"00",2) <= 0)
 302                                                         goto end;
 303                                                 }
 304                                         }
 305                                 else
 306                                         {
 307                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 308                                                 goto end;
 309                                         }
 310                                 ASN1_INTEGER_free(bs);
 311                                 }
 312                         else if (tag == V_ASN1_ENUMERATED)
 313                                 {
 314                                 ASN1_ENUMERATED *bs;
 315                                 int i;
 316
 317                                 opp=op;
 318                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 319                                 if (bs != NULL)
 320                                         {
 321                                         if (BIO_write(bp,":",1) <= 0) goto end;
 322                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 323                                                 if (BIO_write(bp,"-",1) <= 0)
 324                                                         goto end;
 325                                         for (i=0; i<bs->length; i++)
 326                                                 {
 327                                                 if (BIO_printf(bp,"%02X",
 328                                                         bs->data[i]) <= 0)
 329                                                         goto end;
 330                                                 }
 331                                         if (bs->length == 0)
 332                                                 {
 333                                                 if (BIO_write(bp,"00",2) <= 0)
 334                                                         goto end;
 335                                                 }
 336                                         }
 337                                 else
 338                                         {
 339                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 340                                                 goto end;
 341                                         }
 342                                 ASN1_ENUMERATED_free(bs);
 343                                 }
 344
 345                         if (!nl)
 346                                 {
 347                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 348                                 }
 349                         p+=len;
 350                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 351                                 {
 352                                 ret=2; /* End of sequence */
 353                                 goto end;
 354                                 }
 355                         }
 356                 length-=len;
 357                 }
 358         ret=1;
 359 end:
 360         if (o != NULL) ASN1_OBJECT_free(o);
 361         if (os != NULL) ASN1_OCTET_STRING_free(os);
 362         *pp=p;
 363         return(ret);
 364         }
 365
 366 const char *ASN1_tag2str(int tag)
 367 {
 368         const static char *tag2str[] = {
 369          "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
 370          "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
 371          "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",      /* 10-13 */
 372         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",                /* 15-17 */
 373         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",            /* 18-20 */
 374         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
 375         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",          /* 25-27 */
 376         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"                 /* 28-30 */
 377         };
 378
 379         if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
 380                                                         tag &= ~0x100;
 381
 382         if(tag < 0 || tag > 30) return "(unknown)";
 383         return tag2str[tag];
 384 }
 385