crypto/asn1/asn1_par.c

   1 /* crypto/asn1/asn1_par.c */
   2 /* Copyright (C) 1995-1997 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 char *fmt="%-18s";
  83         static char *fmt2="%2d %-15s";
  84         char *p,str[128],*p2=NULL;
  85
  86         if (constructed & V_ASN1_CONSTRUCTED)
  87                 p="cons: ";
  88         else
  89                 p="prim: ";
  90         if (BIO_write(bp,p,6) < 6) goto err;
  91         if (indent)
  92                 {
  93                 if (indent > 128) indent=128;
  94                 memset(str,' ',indent);
  95                 if (BIO_write(bp,str,indent) < indent) goto err;
  96                 }
  97
  98         p=str;
  99         if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
 100                 sprintf(str,"priv [ %d ] ",tag);
 101         else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
 102                 sprintf(str,"cont [ %d ]",tag);
 103         else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
 104                 sprintf(str,"appl [ %d ]",tag);
 105         else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */)
 106                 p="EOC";
 107         else if (tag == V_ASN1_BOOLEAN)
 108                 p="BOOLEAN";
 109         else if (tag == V_ASN1_INTEGER)
 110                 p="INTEGER";
 111         else if (tag == V_ASN1_BIT_STRING)
 112                 p="BIT STRING";
 113         else if (tag == V_ASN1_OCTET_STRING)
 114                 p="OCTET STRING";
 115         else if (tag == V_ASN1_NULL)
 116                 p="NULL";
 117         else if (tag == V_ASN1_OBJECT)
 118                 p="OBJECT";
 119         else if (tag == V_ASN1_SEQUENCE)
 120                 p="SEQUENCE";
 121         else if (tag == V_ASN1_SET)
 122                 p="SET";
 123         else if (tag == V_ASN1_PRINTABLESTRING)
 124                 p="PRINTABLESTRING";
 125         else if (tag == V_ASN1_T61STRING)
 126                 p="T61STRING";
 127         else if (tag == V_ASN1_IA5STRING)
 128                 p="IA5STRING";
 129         else if (tag == V_ASN1_UTCTIME)
 130                 p="UTCTIME";
 131
 132         /* extras */
 133         else if (tag == V_ASN1_NUMERICSTRING)
 134                 p="NUMERICSTRING";
 135         else if (tag == V_ASN1_VIDEOTEXSTRING)
 136                 p="VIDEOTEXSTRING";
 137         else if (tag == V_ASN1_GENERALIZEDTIME)
 138                 p="GENERALIZEDTIME";
 139         else if (tag == V_ASN1_GRAPHICSTRING)
 140                 p="GRAPHICSTRING";
 141         else if (tag == V_ASN1_ISO64STRING)
 142                 p="ISO64STRING";
 143         else if (tag == V_ASN1_GENERALSTRING)
 144                 p="GENERALSTRING";
 145         else if (tag == V_ASN1_UNIVERSALSTRING)
 146                 p="UNIVERSALSTRING";
 147
 148         else
 149                 p2="(unknown)";
 150
 151         if (p2 != NULL)
 152                 {
 153                 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
 154                 }
 155         else
 156                 {
 157                 if (BIO_printf(bp,fmt,p) <= 0) goto err;
 158                 }
 159         return(1);
 160 err:
 161         return(0);
 162         }
 163
 164 int ASN1_parse(bp, pp, len, indent)
 165 BIO *bp;
 166 unsigned char *pp;
 167 long len;
 168 int indent;
 169         {
 170         return(asn1_parse2(bp,&pp,len,0,0,indent));
 171         }
 172
 173 static int asn1_parse2(bp, pp, length, offset, depth, indent)
 174 BIO *bp;
 175 unsigned char **pp;
 176 long length;
 177 int offset;
 178 int depth;
 179 int indent;
 180         {
 181         unsigned char *p,*ep,*tot,*op,*opp;
 182         long len;
 183         int tag,xclass,ret=0;
 184         int nl,hl,j,r;
 185         ASN1_OBJECT *o=NULL;
 186         ASN1_OCTET_STRING *os=NULL;
 187
 188         p= *pp;
 189         tot=p+length;
 190         op=p-1;
 191         while ((p < tot) && (op < p))
 192                 {
 193                 op=p;
 194                 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
 195 #ifdef LINT
 196                 j=j;
 197 #endif
 198                 if (j & 0x80)
 199                         {
 200                         if (BIO_write(bp,"Error in encoding\n",18) <= 0)
 201                                 goto end;
 202                         ret=0;
 203                         goto end;
 204                         }
 205                 hl=(p-op);
 206                 length-=hl;
 207                 /* if j == 0x21 it is a constructed indefinite length object */
 208                 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
 209                         <= 0) goto end;
 210
 211                 if (j != (V_ASN1_CONSTRUCTED | 1))
 212                         {
 213                         if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
 214                                 depth,(long)hl,len) <= 0)
 215                                 goto end;
 216                         }
 217                 else
 218                         {
 219                         if (BIO_printf(bp,"d=%-2d hl=%ld l=inf  ",
 220                                 depth,(long)hl) <= 0)
 221                                 goto end;
 222                         }
 223                 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
 224                         goto end;
 225                 if (j & V_ASN1_CONSTRUCTED)
 226                         {
 227                         ep=p+len;
 228                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 229                         if (len > length)
 230                                 {
 231                                 BIO_printf(bp,
 232                                         "length is greater than %ld\n",length);
 233                                 ret=0;
 234                                 goto end;
 235                                 }
 236                         if ((j == 0x21) && (len == 0))
 237                                 {
 238                                 for (;;)
 239                                         {
 240                                         r=asn1_parse2(bp,&p,(long)(tot-p),
 241                                                 offset+(p - *pp),depth+1,
 242                                                 indent);
 243                                         if (r == 0) { ret=0; goto end; }
 244                                         if ((r == 2) || (p >= tot)) break;
 245                                         }
 246                                 }
 247                         else
 248                                 while (p < ep)
 249                                         {
 250                                         r=asn1_parse2(bp,&p,(long)len,
 251                                                 offset+(p - *pp),depth+1,
 252                                                 indent);
 253                                         if (r == 0) { ret=0; goto end; }
 254                                         }
 255                         }
 256                 else if (xclass != 0)
 257                         {
 258                         p+=len;
 259                         if (BIO_write(bp,"\n",1) <= 0) goto end;
 260                         }
 261                 else
 262                         {
 263                         nl=0;
 264                         if (    (tag == V_ASN1_PRINTABLESTRING) ||
 265                                 (tag == V_ASN1_T61STRING) ||
 266                                 (tag == V_ASN1_IA5STRING) ||
 267                                 (tag == V_ASN1_UTCTIME))
 268                                 {
 269                                 if (BIO_write(bp,":",1) <= 0) goto end;
 270                                 if ((len > 0) &&
 271                                         BIO_write(bp,(char *)p,(int)len)
 272                                         != (int)len)
 273                                         goto end;
 274                                 }
 275                         else if (tag == V_ASN1_OBJECT)
 276                                 {
 277                                 opp=op;
 278                                 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
 279                                         {
 280                                         if (BIO_write(bp,":",1) <= 0) goto end;
 281                                         i2a_ASN1_OBJECT(bp,o);
 282                                         }
 283                                 else
 284                                         {
 285                                         if (BIO_write(bp,":BAD OBJECT",11) <= 0)
 286                                                 goto end;
 287                                         }
 288                                 }
 289                         else if (tag == V_ASN1_BOOLEAN)
 290                                 {
 291                                 int ii;
 292
 293                                 opp=op;
 294                                 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
 295                                 if (ii < 0)
 296                                         {
 297                                         if (BIO_write(bp,"Bad boolean\n",12))
 298                                                 goto end;
 299                                         }
 300                                 BIO_printf(bp,":%d",ii);
 301                                 }
 302                         else if (tag == V_ASN1_OCTET_STRING)
 303                                 {
 304                                 int i,printable=1;
 305
 306                                 opp=op;
 307                                 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
 308                                 if (os != NULL)
 309                                         {
 310                                         opp=os->data;
 311                                         for (i=0; i<os->length; i++)
 312                                                 {
 313                                                 if ((   (opp[i] < ' ') &&
 314                                                         (opp[i] != '\n') &&
 315                                                         (opp[i] != '\r') &&
 316                                                         (opp[i] != '\t')) ||
 317                                                         (opp[i] > '~'))
 318                                                         {
 319                                                         printable=0;
 320                                                         break;
 321                                                         }
 322                                                 }
 323                                         if (printable && (os->length > 0))
 324                                                 {
 325                                                 if (BIO_write(bp,":",1) <= 0)
 326                                                         goto end;
 327                                                 if (BIO_write(bp,(char *)opp,
 328                                                         os->length) <= 0)
 329                                                         goto end;
 330                                                 }
 331                                         ASN1_OCTET_STRING_free(os);
 332                                         os=NULL;
 333                                         }
 334                                 }
 335                         else if (tag == V_ASN1_INTEGER)
 336                                 {
 337                                 ASN1_INTEGER *bs;
 338                                 int i;
 339
 340                                 opp=op;
 341                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
 342                                 if (bs != NULL)
 343                                         {
 344                                         if (BIO_write(bp,":",1) <= 0) goto end;
 345                                         if (bs->type == V_ASN1_NEG_INTEGER)
 346                                                 if (BIO_write(bp,"-",1) <= 0)
 347                                                         goto end;
 348                                         for (i=0; i<bs->length; i++)
 349                                                 {
 350                                                 if (BIO_printf(bp,"%02X",
 351                                                         bs->data[i]) <= 0)
 352                                                         goto end;
 353                                                 }
 354                                         if (bs->length == 0)
 355                                                 {
 356                                                 if (BIO_write(bp,"00",2) <= 0)
 357                                                         goto end;
 358                                                 }
 359                                         }
 360                                 else
 361                                         {
 362                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
 363                                                 goto end;
 364                                         }
 365                                 ASN1_INTEGER_free(bs);
 366                                 }
 367
 368                         if (!nl)
 369                                 {
 370                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
 371                                 }
 372                         p+=len;
 373                         if ((tag == V_ASN1_EOC) && (xclass == 0))
 374                                 {
 375                                 ret=2; /* End of sequence */
 376                                 goto end;
 377                                 }
 378                         }
 379                 length-=len;
 380                 }
 381         ret=1;
 382 end:
 383         if (o != NULL) ASN1_OBJECT_free(o);
 384         if (os != NULL) ASN1_OCTET_STRING_free(os);
 385         *pp=p;
 386         return(ret);
 387         }