crypto/openssl-0.9/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 <shenson@bigfoot.com> 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 int MAIN(int, char **);
  84
  85 static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
  86
  87 int MAIN(int argc, char **argv)
  88         {
  89         int i,badops=0,offset=0,ret=1,j;
  90         unsigned int length=0;
  91         long num,tmplen;
  92         BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
  93         int informat,indent=0, noout = 0, dump = 0;
  94         char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL;
  95         char *genstr=NULL, *genconf=NULL;
  96         unsigned char *tmpbuf;
  97         const unsigned char *ctmpbuf;
  98         BUF_MEM *buf=NULL;
  99         STACK *osk=NULL;
 100         ASN1_TYPE *at=NULL;
 101
 102         informat=FORMAT_PEM;
 103
 104         apps_startup();
 105
 106         if (bio_err == NULL)
 107                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 108                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 109
 110         if (!load_config(bio_err, NULL))
 111                 goto end;
 112
 113         prog=argv[0];
 114         argc--;
 115         argv++;
 116         if ((osk=sk_new_null()) == NULL)
 117                 {
 118                 BIO_printf(bio_err,"Memory allocation failure\n");
 119                 goto end;
 120                 }
 121         while (argc >= 1)
 122                 {
 123                 if      (strcmp(*argv,"-inform") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         informat=str2fmt(*(++argv));
 127                         }
 128                 else if (strcmp(*argv,"-in") == 0)
 129                         {
 130                         if (--argc < 1) goto bad;
 131                         infile= *(++argv);
 132                         }
 133                 else if (strcmp(*argv,"-out") == 0)
 134                         {
 135                         if (--argc < 1) goto bad;
 136                         derfile= *(++argv);
 137                         }
 138                 else if (strcmp(*argv,"-i") == 0)
 139                         {
 140                         indent=1;
 141                         }
 142                 else if (strcmp(*argv,"-noout") == 0) noout = 1;
 143                 else if (strcmp(*argv,"-oid") == 0)
 144                         {
 145                         if (--argc < 1) goto bad;
 146                         oidfile= *(++argv);
 147                         }
 148                 else if (strcmp(*argv,"-offset") == 0)
 149                         {
 150                         if (--argc < 1) goto bad;
 151                         offset= atoi(*(++argv));
 152                         }
 153                 else if (strcmp(*argv,"-length") == 0)
 154                         {
 155                         if (--argc < 1) goto bad;
 156                         length= atoi(*(++argv));
 157                         if (length == 0) goto bad;
 158                         }
 159                 else if (strcmp(*argv,"-dump") == 0)
 160                         {
 161                         dump= -1;
 162                         }
 163                 else if (strcmp(*argv,"-dlimit") == 0)
 164                         {
 165                         if (--argc < 1) goto bad;
 166                         dump= atoi(*(++argv));
 167                         if (dump <= 0) goto bad;
 168                         }
 169                 else if (strcmp(*argv,"-strparse") == 0)
 170                         {
 171                         if (--argc < 1) goto bad;
 172                         sk_push(osk,*(++argv));
 173                         }
 174                 else if (strcmp(*argv,"-genstr") == 0)
 175                         {
 176                         if (--argc < 1) goto bad;
 177                         genstr= *(++argv);
 178                         }
 179                 else if (strcmp(*argv,"-genconf") == 0)
 180                         {
 181                         if (--argc < 1) goto bad;
 182                         genconf= *(++argv);
 183                         }
 184                 else
 185                         {
 186                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 187                         badops=1;
 188                         break;
 189                         }
 190                 argc--;
 191                 argv++;
 192                 }
 193
 194         if (badops)
 195                 {
 196 bad:
 197                 BIO_printf(bio_err,"%s [options] <infile\n",prog);
 198                 BIO_printf(bio_err,"where options are\n");
 199                 BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
 200                 BIO_printf(bio_err," -in arg       input file\n");
 201                 BIO_printf(bio_err," -out arg      output file (output format is always DER\n");
 202                 BIO_printf(bio_err," -noout arg    don't produce any output\n");
 203                 BIO_printf(bio_err," -offset arg   offset into file\n");
 204                 BIO_printf(bio_err," -length arg   length of section in file\n");
 205                 BIO_printf(bio_err," -i            indent entries\n");
 206                 BIO_printf(bio_err," -dump         dump unknown data in hex form\n");
 207                 BIO_printf(bio_err," -dlimit arg   dump the first arg bytes of unknown data in hex form\n");
 208                 BIO_printf(bio_err," -oid file     file of extra oid definitions\n");
 209                 BIO_printf(bio_err," -strparse offset\n");
 210                 BIO_printf(bio_err,"               a series of these can be used to 'dig' into multiple\n");
 211                 BIO_printf(bio_err,"               ASN1 blob wrappings\n");
 212                 BIO_printf(bio_err," -genstr str   string to generate ASN1 structure from\n");
 213                 BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n");
 214                 goto end;
 215                 }
 216
 217         ERR_load_crypto_strings();
 218
 219         in=BIO_new(BIO_s_file());
 220         out=BIO_new(BIO_s_file());
 221         if ((in == NULL) || (out == NULL))
 222                 {
 223                 ERR_print_errors(bio_err);
 224                 goto end;
 225                 }
 226         BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
 227 #ifdef OPENSSL_SYS_VMS
 228         {
 229         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 230         out = BIO_push(tmpbio, out);
 231         }
 232 #endif
 233
 234         if (oidfile != NULL)
 235                 {
 236                 if (BIO_read_filename(in,oidfile) <= 0)
 237                         {
 238                         BIO_printf(bio_err,"problems opening %s\n",oidfile);
 239                         ERR_print_errors(bio_err);
 240                         goto end;
 241                         }
 242                 OBJ_create_objects(in);
 243                 }
 244
 245         if (infile == NULL)
 246                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 247         else
 248                 {
 249                 if (BIO_read_filename(in,infile) <= 0)
 250                         {
 251                         perror(infile);
 252                         goto end;
 253                         }
 254                 }
 255
 256         if (derfile) {
 257                 if(!(derout = BIO_new_file(derfile, "wb"))) {
 258                         BIO_printf(bio_err,"problems opening %s\n",derfile);
 259                         ERR_print_errors(bio_err);
 260                         goto end;
 261                 }
 262         }
 263
 264         if ((buf=BUF_MEM_new()) == NULL) goto end;
 265         if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
 266
 267         if (genstr || genconf)
 268                 {
 269                 num = do_generate(bio_err, genstr, genconf, buf);
 270                 if (num < 0)
 271                         {
 272                         ERR_print_errors(bio_err);
 273                         goto end;
 274                         }
 275                 }
 276
 277         else
 278                 {
 279
 280                 if (informat == FORMAT_PEM)
 281                         {
 282                         BIO *tmp;
 283
 284                         if ((b64=BIO_new(BIO_f_base64())) == NULL)
 285                                 goto end;
 286                         BIO_push(b64,in);
 287                         tmp=in;
 288                         in=b64;
 289                         b64=tmp;
 290                         }
 291
 292                 num=0;
 293                 for (;;)
 294                         {
 295                         if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
 296                         i=BIO_read(in,&(buf->data[num]),BUFSIZ);
 297                         if (i <= 0) break;
 298                         num+=i;
 299                         }
 300                 }
 301         str=buf->data;
 302
 303         /* If any structs to parse go through in sequence */
 304
 305         if (sk_num(osk))
 306                 {
 307                 tmpbuf=(unsigned char *)str;
 308                 tmplen=num;
 309                 for (i=0; i<sk_num(osk); i++)
 310                         {
 311                         ASN1_TYPE *atmp;
 312                         int typ;
 313                         j=atoi(sk_value(osk,i));
 314                         if (j == 0)
 315                                 {
 316                                 BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i));
 317                                 continue;
 318                                 }
 319                         tmpbuf+=j;
 320                         tmplen-=j;
 321                         atmp = at;
 322                         ctmpbuf = tmpbuf;
 323                         at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen);
 324                         ASN1_TYPE_free(atmp);
 325                         if(!at)
 326                                 {
 327                                 BIO_printf(bio_err,"Error parsing structure\n");
 328                                 ERR_print_errors(bio_err);
 329                                 goto end;
 330                                 }
 331                         typ = ASN1_TYPE_get(at);
 332                         if ((typ == V_ASN1_OBJECT)
 333                                 || (typ == V_ASN1_NULL))
 334                                 {
 335                                 BIO_printf(bio_err, "Can't parse %s type\n",
 336                                         typ == V_ASN1_NULL ? "NULL" : "OBJECT");
 337                                 ERR_print_errors(bio_err);
 338                                 goto end;
 339                                 }
 340                         /* hmm... this is a little evil but it works */
 341                         tmpbuf=at->value.asn1_string->data;
 342                         tmplen=at->value.asn1_string->length;
 343                         }
 344                 str=(char *)tmpbuf;
 345                 num=tmplen;
 346                 }
 347
 348         if (offset >= num)
 349                 {
 350                 BIO_printf(bio_err, "Error: offset too large\n");
 351                 goto end;
 352                 }
 353
 354         num -= offset;
 355
 356         if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
 357         if(derout) {
 358                 if(BIO_write(derout, str + offset, length) != (int)length) {
 359                         BIO_printf(bio_err, "Error writing output\n");
 360                         ERR_print_errors(bio_err);
 361                         goto end;
 362                 }
 363         }
 364         if (!noout &&
 365             !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
 366                     indent,dump))
 367                 {
 368                 ERR_print_errors(bio_err);
 369                 goto end;
 370                 }
 371         ret=0;
 372 end:
 373         BIO_free(derout);
 374         if (in != NULL) BIO_free(in);
 375         if (out != NULL) BIO_free_all(out);
 376         if (b64 != NULL) BIO_free(b64);
 377         if (ret != 0)
 378                 ERR_print_errors(bio_err);
 379         if (buf != NULL) BUF_MEM_free(buf);
 380         if (at != NULL) ASN1_TYPE_free(at);
 381         if (osk != NULL) sk_free(osk);
 382         OBJ_cleanup();
 383         apps_shutdown();
 384         OPENSSL_EXIT(ret);
 385         }
 386
 387 static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
 388         {
 389         CONF *cnf = NULL;
 390         int len;
 391         long errline;
 392         unsigned char *p;
 393         ASN1_TYPE *atyp = NULL;
 394
 395         if (genconf)
 396                 {
 397                 cnf = NCONF_new(NULL);
 398                 if (!NCONF_load(cnf, genconf, &errline))
 399                         goto conferr;
 400                 if (!genstr)
 401                         genstr = NCONF_get_string(cnf, "default", "asn1");
 402                 if (!genstr)
 403                         {
 404                         BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
 405                         goto err;
 406                         }
 407                 }
 408
 409         atyp = ASN1_generate_nconf(genstr, cnf);
 410         NCONF_free(cnf);
 411
 412         if (!atyp)
 413                 return -1;
 414
 415         len = i2d_ASN1_TYPE(atyp, NULL);
 416
 417         if (len <= 0)
 418                 goto err;
 419
 420         if (!BUF_MEM_grow(buf,len))
 421                 goto err;
 422
 423         p=(unsigned char *)buf->data;
 424
 425         i2d_ASN1_TYPE(atyp, &p);
 426
 427         ASN1_TYPE_free(atyp);
 428         return len;
 429
 430         conferr:
 431
 432         if (errline > 0)
 433                 BIO_printf(bio, "Error on line %ld of config file '%s'\n",
 434                                                         errline, genconf);
 435         else
 436                 BIO_printf(bio, "Error loading config file '%s'\n", genconf);
 437
 438         err:
 439         NCONF_free(cnf);
 440         ASN1_TYPE_free(atyp);
 441
 442         return -1;
 443
 444         }