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 "err.h"
  68 #include "evp.h"
  69 #include "x509.h"
  70 #include "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 decription file
  78  */
  79
  80 #undef PROG
  81 #define PROG    asn1parse_main
  82
  83 int MAIN(argc, argv)
  84 int argc;
  85 char **argv;
  86         {
  87         int i,badops=0,offset=0,ret=1,j;
  88         unsigned int length=0;
  89         long num,tmplen;
  90         BIO *in=NULL,*out=NULL,*b64=NULL;
  91         int informat,indent=0;
  92         char *infile=NULL,*str=NULL,*prog,*oidfile=NULL;
  93         unsigned char *tmpbuf;
  94         BUF_MEM *buf=NULL;
  95         STACK *osk=NULL;
  96         ASN1_TYPE *at=NULL;
  97
  98         informat=FORMAT_PEM;
  99
 100         apps_startup();
 101
 102         if (bio_err == NULL)
 103                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 104                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 105
 106         prog=argv[0];
 107         argc--;
 108         argv++;
 109         if ((osk=sk_new_null()) == NULL)
 110                 {
 111                 BIO_printf(bio_err,"Malloc failure\n");
 112                 goto end;
 113                 }
 114         while (argc >= 1)
 115                 {
 116                 if      (strcmp(*argv,"-inform") == 0)
 117                         {
 118                         if (--argc < 1) goto bad;
 119                         informat=str2fmt(*(++argv));
 120                         }
 121                 else if (strcmp(*argv,"-in") == 0)
 122                         {
 123                         if (--argc < 1) goto bad;
 124                         infile= *(++argv);
 125                         }
 126                 else if (strcmp(*argv,"-i") == 0)
 127                         {
 128                         indent=1;
 129                         }
 130                 else if (strcmp(*argv,"-oid") == 0)
 131                         {
 132                         if (--argc < 1) goto bad;
 133                         oidfile= *(++argv);
 134                         }
 135                 else if (strcmp(*argv,"-offset") == 0)
 136                         {
 137                         if (--argc < 1) goto bad;
 138                         offset= atoi(*(++argv));
 139                         }
 140                 else if (strcmp(*argv,"-length") == 0)
 141                         {
 142                         if (--argc < 1) goto bad;
 143                         length= atoi(*(++argv));
 144                         if (length == 0) goto bad;
 145                         }
 146                 else if (strcmp(*argv,"-strparse") == 0)
 147                         {
 148                         if (--argc < 1) goto bad;
 149                         sk_push(osk,*(++argv));
 150                         }
 151                 else
 152                         {
 153                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 154                         badops=1;
 155                         break;
 156                         }
 157                 argc--;
 158                 argv++;
 159                 }
 160
 161         if (badops)
 162                 {
 163 bad:
 164                 BIO_printf(bio_err,"%s [options] <infile\n",prog);
 165                 BIO_printf(bio_err,"where options are\n");
 166                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
 167                 BIO_printf(bio_err," -in arg       inout file\n");
 168                 BIO_printf(bio_err," -offset arg   offset into file\n");
 169                 BIO_printf(bio_err," -length arg   lenth of section in file\n");
 170                 BIO_printf(bio_err," -i            indent entries\n");
 171                 BIO_printf(bio_err," -oid file     file of extra oid definitions\n");
 172                 BIO_printf(bio_err," -strparse offset\n");
 173                 BIO_printf(bio_err,"               a series of these can be used to 'dig' into multiple\n");
 174                 BIO_printf(bio_err,"               ASN1 blob wrappings\n");
 175                 goto end;
 176                 }
 177
 178         ERR_load_crypto_strings();
 179
 180         in=BIO_new(BIO_s_file());
 181         out=BIO_new(BIO_s_file());
 182         if ((in == NULL) || (out == NULL))
 183                 {
 184                 ERR_print_errors(bio_err);
 185                 goto end;
 186                 }
 187         BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
 188
 189         if (oidfile != NULL)
 190                 {
 191                 if (BIO_read_filename(in,oidfile) <= 0)
 192                         {
 193                         BIO_printf(bio_err,"problems opening %s\n",oidfile);
 194                         ERR_print_errors(bio_err);
 195                         goto end;
 196                         }
 197                 OBJ_create_objects(in);
 198                 }
 199
 200         if (infile == NULL)
 201                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 202         else
 203                 {
 204                 if (BIO_read_filename(in,infile) <= 0)
 205                         {
 206                         perror(infile);
 207                         goto end;
 208                         }
 209                 }
 210
 211         if ((buf=BUF_MEM_new()) == NULL) goto end;
 212         if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
 213
 214         if (informat == FORMAT_PEM)
 215                 {
 216                 BIO *tmp;
 217
 218                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 219                         goto end;
 220                 BIO_push(b64,in);
 221                 tmp=in;
 222                 in=b64;
 223                 b64=tmp;
 224                 }
 225
 226         num=0;
 227         for (;;)
 228                 {
 229                 if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
 230                 i=BIO_read(in,&(buf->data[num]),BUFSIZ);
 231                 if (i <= 0) break;
 232                 num+=i;
 233                 }
 234         str=buf->data;
 235
 236         /* If any structs to parse go through in sequence */
 237
 238         if (sk_num(osk))
 239                 {
 240                 tmpbuf=(unsigned char *)str;
 241                 tmplen=num;
 242                 for (i=0; i<sk_num(osk); i++)
 243                         {
 244                         j=atoi(sk_value(osk,i));
 245                         if (j == 0)
 246                                 {
 247                                 BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i));
 248                                 continue;
 249                                 }
 250                         tmpbuf+=j;
 251                         tmplen-=j;
 252                         if (d2i_ASN1_TYPE(&at,&tmpbuf,tmplen) == NULL)
 253                                 {
 254                                 BIO_printf(bio_err,"Error parsing structure\n");
 255                                 ERR_print_errors(bio_err);
 256                                 goto end;
 257                                 }
 258                         /* hmm... this is a little evil but it works */
 259                         tmpbuf=at->value.asn1_string->data;
 260                         tmplen=at->value.asn1_string->length;
 261                         }
 262                 str=(char *)tmpbuf;
 263                 num=tmplen;
 264                 }
 265
 266         if (length == 0) length=(unsigned int)num;
 267         if (!ASN1_parse(out,(unsigned char *)&(str[offset]),length,indent))
 268                 {
 269                 ERR_print_errors(bio_err);
 270                 goto end;
 271                 }
 272         ret=0;
 273 end:
 274         if (in != NULL) BIO_free(in);
 275         if (out != NULL) BIO_free(out);
 276         if (b64 != NULL) BIO_free(b64);
 277         if (ret != 0)
 278                 ERR_print_errors(bio_err);
 279         if (buf != NULL) BUF_MEM_free(buf);
 280         if (at != NULL) ASN1_TYPE_free(at);
 281         if (osk != NULL) sk_free(osk);
 282         OBJ_cleanup();
 283         EXIT(ret);
 284         }
 285