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 "buffer.h"
  62 #include "objects.h"
  63 #include "x509.h"
  64
  65 #ifndef NOPROTO
  66 static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
  67         int indent);
  68 static int asn1_parse2(BIO *bp, unsigned char **pp, long length,
  69         int offset, int depth, int indent);
  70 #else
  71 static int asn1_print_info();
  72 static int asn1_parse2();
  73 #endif
  74
  75 static int asn1_print_info(bp, tag, xclass, constructed,indent)
  76 BIO *bp;
  77 int tag;
  78 int xclass;
  79 int constructed;
  80 int indent;
  81         {
  82         static const char fmt[]="%-18s";
  83         static const char fmt2[]="%2d %-15s";
  84         char str[128];
  85         const char *p,*p2=NULL;
  86
  87         if (constructed & V_ASN1_CONSTRUCTED)
  88                 p="cons: ";
  89         else
  90                 p="prim: ";
  91         if (BIO_write(bp,p,6) < 6) goto err;
  92         if (indent)
  93                 {
  94                 if (indent > 128) indent=128;
  95                 memset(str,' ',indent);
  96                 if (BIO_write(bp,str,indent) < indent) goto err;
  97                 }
  98
  99         p=str;
 100         if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
 101                 sprintf(str,"priv [ %d ] ",tag);
 102         else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
 103                 sprintf(str,"cont [ %d ]",tag);
 104         else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
 105                 sprintf(str,"appl [ %d ]",tag);
 106         else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */)
 107                 p="EOC";
 108         else if (tag == V_ASN1_BOOLEAN)
 109                 p="BOOLEAN";
 110         else if (tag == V_ASN1_INTEGER)
 111                 p="INTEGER";
 112         else if (tag == V_ASN1_ENUMERATED)
 113                 p="ENUMERATED";
 114         else if (tag == V_ASN1_BIT_STRING)
 115                 p="BIT STRING";
 116         else if (tag == V_ASN1_OCTET_STRING)
 117                 p="OCTET STRING";
 118         else if (tag == V_ASN1_NULL)
 119                 p="NULL";
 120         else if (tag == V_ASN1_OBJECT)
 121                 p="OBJECT";
 122         else if (tag == V_ASN1_SEQUENCE)
 123                 p="SEQUENCE";
 124         else if (tag == V_ASN1_SET)
 125                 p="SET";
 126         else if (tag == V_ASN1_PRINTABLESTRING)
 127                 p="PRINTABLESTRING";
 128         else if (tag == V_ASN1_T61STRING)
 129                 p="T61STRING";
 130         else if (tag == V_ASN1_IA5STRING)
 131                 p="IA5STRING";
 132         else if (tag == V_ASN1_UTCTIME)
 133                 p="UTCTIME";
 134
 135         /* extras */
 136         else if (tag == V_ASN1_NUMERICSTRING)
 137                 p="NUMERICSTRING";
 138         else if (tag == V_ASN1_VIDEOTEXSTRING)
 139                 p="VIDEOTEXSTRING";
 140         else if (tag == V_ASN1_GENERALIZEDTIME)
 141                 p="GENERALIZEDTIME";
 142         else if (tag == V_ASN1_GRAPHICSTRING)
 143                 p="GRAPHICSTRING";
 144         else if (tag == V_ASN1_ISO64STRING)
 145                 p="ISO64STRING";
 146         else if (tag == V_ASN1_GENERALSTRING)
 147                 p="GENERALSTRING";
 148         else if (tag == V_ASN1_UNIVERSALSTRING)
 149                 p="UNIVERSALSTRING";
 150         else if (tag == V_ASN1_BMPSTRING)
 151                 p="BMPSTRING";
 152         else
 153                 p2="(unknown)";
 154
 155         if (p2 != NULL)
 156                 {
 157                 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
 158                 }
 159         else
 160                 {
 161                 if (BIO_printf(bp,fmt,p) <= 0) goto err;
 162                 }
 163         return(1);
 164 err:
 165         return(0);
 166         }
 167
 168 int ASN1_parse(bp, pp, len, indent)
 169 BIO *bp;
 170 unsigned char *pp;
 171 long len;
 172 int indent;
 173         {
 174         return(asn1_parse2(bp,&pp,len,0,0,indent));
 175         }
 176
 177 static int asn1_parse2(bp, pp, length, offset, depth, indent)
 178 BIO *bp;
 179 unsigned char **pp;
 180 long length;
 181 int offset;
 182 int depth;
 183 int indent;
 184         {
 185         unsigned char *p,*ep,*tot,*op,*opp;
 186         long len;
 187         int tag,xclass,ret=0;
 188         int nl,hl,j,r;
 189         ASN1_OBJECT *o=NULL;
 190         ASN1_OCTET_STRING *os=NULL;
 191         /* ASN1_BMPSTRING *bmp=NULL;*/
 192
 193         p= *pp;
 194         tot=p+length;
 195         op=p-1;
 196         while ((p < tot) && (op < p))
 197                 {
 198                 op=p;
 199                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 200 #ifdef LINT
 201                 j=j;
 202 #endif
 203                 if (j & 0x80)
 204                         {
 205                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 206                                 goto end;
 207                         ret=0;
 208                         goto end;
 209                         }
 210                 hl=(p-op);
 211                 length-=hl;
 212                 /* if j == 0x21 it is a constructed indefinite length object */
 213                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 214                         <= 0) goto end;
 215
 216                 if (j != (V_ASN1_CONSTRUCTED | 1))
 217                         {
 218                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 219                                 depth,(long)hl,len) <= 0)
 220                                 goto end;
 221                         }
 222                 else
 223                         {
 224                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 225                                 depth,(long)hl) <= 0)
 226                                 goto end;
 227                         }
 228                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 229                         goto end;
 230                 if (j & V_ASN1_CONSTRUCTED)
 231                         {
 232                         ep=p+len;
 233                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 234                         if (len > length)
 235                                 {
 236                                 BIO_printf(bp,
 237                                         "length is greater than %ld\n",length);
 238                                 ret=0;
 239                                 goto end;
 240                                 }
 241                         if ((j == 0x21) && (len == 0))
 242                                 {
 243                                 for (;;)
 244                                         {
 245                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 246                                                 offset+(p - *pp),depth+1,
 247                                                 indent);
 248                                         if (r == 0) { ret=0; goto end; }
 249                                         if ((r == 2) || (p >= tot)) break;
 250                                         }
 251                                 }
 252                         else
 253                                 while (p < ep)
 254                                         {
 255                                         r=asn1_parse2(bp,&p,(long)len,
 256                                                 offset+(p - *pp),depth+1,
 257                                                 indent);
 258                                         if (r == 0) { ret=0; goto end; }
 259                                         }
 260                         }
 261                 else if (xclass != 0)
 262                         {
 263                         p+=len;
 264                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 265                         }
 266                 else
 267                         {
 268                         nl=0;
 269                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 270                                 (tag == V_ASN1_T61STRING) ||
 271                                 (tag == V_ASN1_IA5STRING) ||
 272                                 (tag == V_ASN1_UTCTIME) ||
 273                                 (tag == V_ASN1_GENERALIZEDTIME))
 274                                 {
 275                                 if (BIO_write(bp,":",1) <= 0) goto end;
 276                                 if ((len > 0) &&
 277                                         BIO_write(bp,(char *)p,(int)len)
 278                                         != (int)len)
 279                                         goto end;
 280                                 }
 281                         else if (tag == V_ASN1_OBJECT)
 282                                 {
 283                                 opp=op;
 284                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 285                                         {
 286                                         if (BIO_write(bp,":",1) <= 0) goto end;
 287                                         i2a_ASN1_OBJECT(bp,o);
 288                                         }
 289                                 else
 290                                         {
 291                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 292                                                 goto end;
 293                                         }
 294                                 }
 295                         else if (tag == V_ASN1_BOOLEAN)
 296                                 {
 297                                 int ii;
 298
 299                                 opp=op;
 300                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 301                                 if (ii < 0)
 302                                         {
 303                                         if (BIO_write(bp,"Bad boolean\n",12))
 304                                                 goto end;
 305                                         }
 306                                 BIO_printf(bp,":%d",ii);
 307                                 }
 308                         else if (tag == V_ASN1_BMPSTRING)
 309                                 {
 310                                 /* do the BMP thang */
 311                                 }
 312                         else if (tag == V_ASN1_OCTET_STRING)
 313                                 {
 314                                 int i,printable=1;
 315
 316                                 opp=op;
 317                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 318                                 if (os != NULL)
 319                                         {
 320                                         opp=os->data;
 321                                         for (i=0; i<os->length; i++)
 322                                                 {
 323                                                 if ((   (opp[i] < ' ') &&
 324                                                         (opp[i] != '\n') &&
 325                                                         (opp[i] != '\r') &&
 326                                                         (opp[i] != '\t')) ||
 327                                                         (opp[i] > '~'))
 328                                                         {
 329                                                         printable=0;
 330                                                         break;
 331                                                         }
 332                                                 }
 333                                         if (printable && (os->length > 0))
 334                                                 {
 335                                                 if (BIO_write(bp,":",1) <= 0)
 336                                                         goto end;
 337                                                 if (BIO_write(bp,(char *)opp,
 338                                                         os->length) <= 0)
 339                                                         goto end;
 340                                                 }
 341                                         ASN1_OCTET_STRING_free(os);
 342                                         os=NULL;
 343                                         }
 344                                 }
 345                         else if (tag == V_ASN1_INTEGER)
 346                                 {
 347                                 ASN1_INTEGER *bs;
 348                                 int i;
 349
 350                                 opp=op;
 351                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 352                                 if (bs != NULL)
 353                                         {
 354                                         if (BIO_write(bp,":",1) <= 0) goto end;
 355                                         if (bs->type == V_ASN1_NEG_INTEGER)
 356                                                 if (BIO_write(bp,"-",1) <= 0)
 357                                                         goto end;
 358                                         for (i=0; i<bs->length; i++)
 359                                                 {
 360                                                 if (BIO_printf(bp,"%02X",
 361                                                         bs->data[i]) <= 0)
 362                                                         goto end;
 363                                                 }
 364                                         if (bs->length == 0)
 365                                                 {
 366                                                 if (BIO_write(bp,"00",2) <= 0)
 367                                                         goto end;
 368                                                 }
 369                                         }
 370                                 else
 371                                         {
 372                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 373                                                 goto end;
 374                                         }
 375                                 ASN1_INTEGER_free(bs);
 376                                 }
 377                         else if (tag == V_ASN1_ENUMERATED)
 378                                 {
 379                                 ASN1_ENUMERATED *bs;
 380                                 int i;
 381
 382                                 opp=op;
 383                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
 384                                 if (bs != NULL)
 385                                         {
 386                                         if (BIO_write(bp,":",1) <= 0) goto end;
 387                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
 388                                                 if (BIO_write(bp,"-",1) <= 0)
 389                                                         goto end;
 390                                         for (i=0; i<bs->length; i++)
 391                                                 {
 392                                                 if (BIO_printf(bp,"%02X",
 393                                                         bs->data[i]) <= 0)
 394                                                         goto end;
 395                                                 }
 396                                         if (bs->length == 0)
 397                                                 {
 398                                                 if (BIO_write(bp,"00",2) <= 0)
 399                                                         goto end;
 400                                                 }
 401                                         }
 402                                 else
 403                                         {
 404                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
 405                                                 goto end;
 406                                         }
 407                                 ASN1_ENUMERATED_free(bs);
 408                                 }
 409
 410                         if (!nl)
 411                                 {
 412                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 413                                 }
 414                         p+=len;
 415                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 416                                 {
 417                                 ret=2; /* End of sequence */
 418                                 goto end;
 419                                 }
 420                         }
 421                 length-=len;
 422                 }
 423         ret=1;
 424 end:
 425         if (o != NULL) ASN1_OBJECT_free(o);
 426         if (os != NULL) ASN1_OCTET_STRING_free(os);
 427         *pp=p;
 428         return(ret);
 429         }