apps/asn1pars.c

   1 /* apps/asn1pars.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 /* A nice addition from Dr Stephen Henson <steve@openssl.org> to
  60  * add the -strparse option which parses nested binary structures
  61  */
  62
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include "apps.h"
  67 #include <openssl/err.h>
  68 #include <openssl/evp.h>
  69 #include <openssl/x509.h>
  70 #include <openssl/pem.h>
  71
  72 /* -inform arg  - input format - default PEM (DER or PEM)
  73  * -in arg      - input file - default stdin
  74  * -i           - indent the details by depth
  75  * -offset      - where in the file to start
  76  * -length      - how many bytes to use
  77  * -oid file    - extra oid description file
  78  */
  79
  80 #undef PROG
  81 #define PROG    asn1parse_main
  82
  83
  84 int MAIN(int, char **);
  85
  86 static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
  87
  88 int MAIN(int argc, char **argv)
  89         {
  90         int i,badops=0,offset=0,ret=1,j;
  91         unsigned int length=0;
  92         long num,tmplen;
  93         BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
  94         int informat,indent=0, noout = 0, dump = 0, strictpem = 0;
  95         char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL, *name=NULL, *header=NULL;
  96         char *genstr=NULL, *genconf=NULL;
  97         unsigned char *tmpbuf;
  98         const unsigned char *ctmpbuf;
  99         BUF_MEM *buf=NULL;
 100         STACK_OF(OPENSSL_STRING) *osk=NULL;
 101         ASN1_TYPE *at=NULL;
 102
 103         informat=FORMAT_PEM;
 104
 105         apps_startup();
 106
 107         if (bio_err == NULL)
 108                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 109                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 110
 111         if (!load_config(bio_err, NULL))
 112                 goto end;
 113
 114         prog=argv[0];
 115         argc--;
 116         argv++;
 117         if ((osk=sk_OPENSSL_STRING_new_null()) == NULL)
 118                 {
 119                 BIO_printf(bio_err,"Memory allocation failure\n");
 120                 goto end;
 121                 }
 122         while (argc >= 1)
 123                 {
 124                 if      (strcmp(*argv,"-inform") == 0)
 125                         {
 126                         if (--argc < 1) goto bad;
 127                         informat=str2fmt(*(++argv));
 128                         }
 129                 else if (strcmp(*argv,"-in") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         infile= *(++argv);
 133                         }
 134                 else if (strcmp(*argv,"-out") == 0)
 135                         {
 136                         if (--argc < 1) goto bad;
 137                         derfile= *(++argv);
 138                         }
 139                 else if (strcmp(*argv,"-i") == 0)
 140                         {
 141                         indent=1;
 142                         }
 143                 else if (strcmp(*argv,"-noout") == 0) noout = 1;
 144                 else if (strcmp(*argv,"-oid") == 0)
 145                         {
 146                         if (--argc < 1) goto bad;
 147                         oidfile= *(++argv);
 148                         }
 149                 else if (strcmp(*argv,"-offset") == 0)
 150                         {
 151                         if (--argc < 1) goto bad;
 152                         offset= atoi(*(++argv));
 153                         }
 154                 else if (strcmp(*argv,"-length") == 0)
 155                         {
 156                         if (--argc < 1) goto bad;
 157                         length= atoi(*(++argv));
 158                         if (length == 0) goto bad;
 159                         }
 160                 else if (strcmp(*argv,"-dump") == 0)
 161                         {
 162                         dump= -1;
 163                         }
 164                 else if (strcmp(*argv,"-dlimit") == 0)
 165                         {
 166                         if (--argc < 1) goto bad;
 167                         dump= atoi(*(++argv));
 168                         if (dump <= 0) goto bad;
 169                         }
 170                 else if (strcmp(*argv,"-strparse") == 0)
 171                         {
 172                         if (--argc < 1) goto bad;
 173                         sk_OPENSSL_STRING_push(osk,*(++argv));
 174                         }
 175                 else if (strcmp(*argv,"-genstr") == 0)
 176                         {
 177                         if (--argc < 1) goto bad;
 178                         genstr= *(++argv);
 179                         }
 180                 else if (strcmp(*argv,"-genconf") == 0)
 181                         {
 182                         if (--argc < 1) goto bad;
 183                         genconf= *(++argv);
 184                         }
 185                 else if (strcmp(*argv,"-strictpem") == 0)
 186                         {
 187                         strictpem = 1;
 188                         informat = FORMAT_PEM;
 189                         }
 190                 else
 191                         {
 192                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 193                         badops=1;
 194                         break;
 195                         }
 196                 argc--;
 197                 argv++;
 198                 }
 199
 200         if (badops)
 201                 {
 202 bad:
 203                 BIO_printf(bio_err,"%s [options] <infile\n",prog);
 204                 BIO_printf(bio_err,"where options are\n");
 205                 BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
 206                 BIO_printf(bio_err," -in arg       input file\n");
 207                 BIO_printf(bio_err," -out arg      output file (output format is always DER\n");
 208                 BIO_printf(bio_err," -noout arg    don't produce any output\n");
 209                 BIO_printf(bio_err," -offset arg   offset into file\n");
 210                 BIO_printf(bio_err," -length arg   length of section in file\n");
 211                 BIO_printf(bio_err," -i            indent entries\n");
 212                 BIO_printf(bio_err," -dump         dump unknown data in hex form\n");
 213                 BIO_printf(bio_err," -dlimit arg   dump the first arg bytes of unknown data in hex form\n");
 214                 BIO_printf(bio_err," -oid file     file of extra oid definitions\n");
 215                 BIO_printf(bio_err," -strparse offset\n");
 216                 BIO_printf(bio_err,"               a series of these can be used to 'dig' into multiple\n");
 217                 BIO_printf(bio_err,"               ASN1 blob wrappings\n");
 218                 BIO_printf(bio_err," -genstr str   string to generate ASN1 structure from\n");
 219                 BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n");
 220                 BIO_printf(bio_err," -strictpem    do not attempt base64 decode outside PEM markers (-inform \n");
 221                 BIO_printf(bio_err,"               will be ignored)\n");
 222                 goto end;
 223                 }
 224
 225         ERR_load_crypto_strings();
 226
 227         in=BIO_new(BIO_s_file());
 228         out=BIO_new(BIO_s_file());
 229         if ((in == NULL) || (out == NULL))
 230                 {
 231                 ERR_print_errors(bio_err);
 232                 goto end;
 233                 }
 234         BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
 235 #ifdef OPENSSL_SYS_VMS
 236         {
 237         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 238         out = BIO_push(tmpbio, out);
 239         }
 240 #endif
 241
 242         if (oidfile != NULL)
 243                 {
 244                 if (BIO_read_filename(in,oidfile) <= 0)
 245                         {
 246                         BIO_printf(bio_err,"problems opening %s\n",oidfile);
 247                         ERR_print_errors(bio_err);
 248                         goto end;
 249                         }
 250                 OBJ_create_objects(in);
 251                 }
 252
 253         if (infile == NULL)
 254                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 255         else
 256                 {
 257                 if (BIO_read_filename(in,infile) <= 0)
 258                         {
 259                         perror(infile);
 260                         goto end;
 261                         }
 262                 }
 263
 264         if (derfile) {
 265                 if(!(derout = BIO_new_file(derfile, "wb"))) {
 266                         BIO_printf(bio_err,"problems opening %s\n",derfile);
 267                         ERR_print_errors(bio_err);
 268                         goto end;
 269                 }
 270         }
 271
 272         if(strictpem)
 273                 {
 274                 if(PEM_read_bio(in, &name, &header, (unsigned char **)&str, &num) != 1)
 275                         {
 276                         BIO_printf(bio_err,"Error reading PEM file\n");
 277                         ERR_print_errors(bio_err);
 278                         goto end;
 279                         }
 280                 }
 281         else
 282                 {
 283
 284                 if ((buf=BUF_MEM_new()) == NULL) goto end;
 285                 if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
 286
 287                 if (genstr || genconf)
 288                         {
 289                         num = do_generate(bio_err, genstr, genconf, buf);
 290                         if (num < 0)
 291                                 {
 292                                 ERR_print_errors(bio_err);
 293                                 goto end;
 294                                 }
 295                         }
 296
 297                 else
 298                         {
 299
 300                         if (informat == FORMAT_PEM)
 301                                 {
 302                                 BIO *tmp;
 303
 304                                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 305                                         goto end;
 306                                 BIO_push(b64,in);
 307                                 tmp=in;
 308                                 in=b64;
 309                                 b64=tmp;
 310                                 }
 311
 312                         num=0;
 313                         for (;;)
 314                                 {
 315                                 if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
 316                                 i=BIO_read(in,&(buf->data[num]),BUFSIZ);
 317                                 if (i <= 0) break;
 318                                 num+=i;
 319                                 }
 320                         }
 321                 str=buf->data;
 322
 323                 }
 324
 325         /* If any structs to parse go through in sequence */
 326
 327         if (sk_OPENSSL_STRING_num(osk))
 328                 {
 329                 tmpbuf=(unsigned char *)str;
 330                 tmplen=num;
 331                 for (i=0; i<sk_OPENSSL_STRING_num(osk); i++)
 332                         {
 333                         ASN1_TYPE *atmp;
 334                         int typ;
 335                         j=atoi(sk_OPENSSL_STRING_value(osk,i));
 336                         if (j == 0)
 337                                 {
 338                                 BIO_printf(bio_err,"'%s' is an invalid number\n",sk_OPENSSL_STRING_value(osk,i));
 339                                 continue;
 340                                 }
 341                         tmpbuf+=j;
 342                         tmplen-=j;
 343                         atmp = at;
 344                         ctmpbuf = tmpbuf;
 345                         at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen);
 346                         ASN1_TYPE_free(atmp);
 347                         if(!at)
 348                                 {
 349                                 BIO_printf(bio_err,"Error parsing structure\n");
 350                                 ERR_print_errors(bio_err);
 351                                 goto end;
 352                                 }
 353                         typ = ASN1_TYPE_get(at);
 354                         if ((typ == V_ASN1_OBJECT)
 355                                 || (typ == V_ASN1_NULL))
 356                                 {
 357                                 BIO_printf(bio_err, "Can't parse %s type\n",
 358                                         typ == V_ASN1_NULL ? "NULL" : "OBJECT");
 359                                 ERR_print_errors(bio_err);
 360                                 goto end;
 361                                 }
 362                         /* hmm... this is a little evil but it works */
 363                         tmpbuf=at->value.asn1_string->data;
 364                         tmplen=at->value.asn1_string->length;
 365                         }
 366                 str=(char *)tmpbuf;
 367                 num=tmplen;
 368                 }
 369
 370         if (offset >= num)
 371                 {
 372                 BIO_printf(bio_err, "Error: offset too large\n");
 373                 goto end;
 374                 }
 375
 376         num -= offset;
 377
 378         if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
 379         if(derout) {
 380                 if(BIO_write(derout, str + offset, length) != (int)length) {
 381                         BIO_printf(bio_err, "Error writing output\n");
 382                         ERR_print_errors(bio_err);
 383                         goto end;
 384                 }
 385         }
 386         if (!noout &&
 387             !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
 388                     indent,dump))
 389                 {
 390                 ERR_print_errors(bio_err);
 391                 goto end;
 392                 }
 393         ret=0;
 394 end:
 395         BIO_free(derout);
 396         if (in != NULL) BIO_free(in);
 397         if (out != NULL) BIO_free_all(out);
 398         if (b64 != NULL) BIO_free(b64);
 399         if (ret != 0)
 400                 ERR_print_errors(bio_err);
 401         if (buf != NULL) BUF_MEM_free(buf);
 402         if (name != NULL) OPENSSL_free(name);
 403         if (header != NULL) OPENSSL_free(header);
 404         if (strictpem && str != NULL) OPENSSL_free(str);
 405         if (at != NULL) ASN1_TYPE_free(at);
 406         if (osk != NULL) sk_OPENSSL_STRING_free(osk);
 407         OBJ_cleanup();
 408         apps_shutdown();
 409         OPENSSL_EXIT(ret);
 410         }
 411
 412 static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
 413         {
 414         CONF *cnf = NULL;
 415         int len;
 416         long errline;
 417         unsigned char *p;
 418         ASN1_TYPE *atyp = NULL;
 419
 420         if (genconf)
 421                 {
 422                 cnf = NCONF_new(NULL);
 423                 if (!NCONF_load(cnf, genconf, &errline))
 424                         goto conferr;
 425                 if (!genstr)
 426                         genstr = NCONF_get_string(cnf, "default", "asn1");
 427                 if (!genstr)
 428                         {
 429                         BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
 430                         goto err;
 431                         }
 432                 }
 433
 434         atyp = ASN1_generate_nconf(genstr, cnf);
 435         NCONF_free(cnf);
 436         cnf = NULL;
 437
 438         if (!atyp)
 439                 return -1;
 440
 441         len = i2d_ASN1_TYPE(atyp, NULL);
 442
 443         if (len <= 0)
 444                 goto err;
 445
 446         if (!BUF_MEM_grow(buf,len))
 447                 goto err;
 448
 449         p=(unsigned char *)buf->data;
 450
 451         i2d_ASN1_TYPE(atyp, &p);
 452
 453         ASN1_TYPE_free(atyp);
 454         return len;
 455
 456         conferr:
 457
 458         if (errline > 0)
 459                 BIO_printf(bio, "Error on line %ld of config file '%s'\n",
 460                                                         errline, genconf);
 461         else
 462                 BIO_printf(bio, "Error loading config file '%s'\n", genconf);
 463
 464         err:
 465         NCONF_free(cnf);
 466         ASN1_TYPE_free(atyp);
 467
 468         return -1;
 469
 470         }