apps/asn1pars.c

   1 /* apps/asn1pars.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 <stdlib.h>
  61 #include <string.h>
  62 #include "apps.h"
  63 #include "err.h"
  64 #include "evp.h"
  65 #include "x509.h"
  66 #include "pem.h"
  67
  68 #define FORMAT_UNDEF    0
  69 #define FORMAT_ASN1     1
  70 #define FORMAT_TEXT     2
  71 #define FORMAT_PEM      3
  72
  73 /* -inform arg  - input format - default PEM (DER or PEM)
  74  * -in arg      - input file - default stdin
  75  * -i           - indent the details by depth
  76  * -offset      - where in the file to start
  77  * -length      - how many bytes to use
  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;
  88         unsigned int length=0;
  89         long num;
  90         BIO *in=NULL,*out=NULL,*b64=NULL;
  91         int informat,indent=0;
  92         char *infile,*str=NULL,*prog;
  93         BUF_MEM *buf=NULL;
  94
  95         infile=NULL;
  96         informat=FORMAT_PEM;
  97
  98         apps_startup();
  99
 100         if (bio_err == NULL)
 101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE);
 103
 104         prog=argv[0];
 105         argc--;
 106         argv++;
 107         while (argc >= 1)
 108                 {
 109                 if      (strcmp(*argv,"-inform") == 0)
 110                         {
 111                         if (--argc < 1) goto bad;
 112                         informat=str2fmt(*(++argv));
 113                         }
 114                 else if (strcmp(*argv,"-in") == 0)
 115                         {
 116                         if (--argc < 1) goto bad;
 117                         infile= *(++argv);
 118                         }
 119                 else if (strcmp(*argv,"-i") == 0)
 120                         {
 121                         indent=1;
 122                         }
 123                 else if (strcmp(*argv,"-offset") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         offset= atoi(*(++argv));
 127                         }
 128                 else if (strcmp(*argv,"-length") == 0)
 129                         {
 130                         if (--argc < 1) goto bad;
 131                         length= atoi(*(++argv));
 132                         if (length == 0) goto bad;
 133                         }
 134                 else
 135                         {
 136                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 137                         badops=1;
 138                         break;
 139                         }
 140                 argc--;
 141                 argv++;
 142                 }
 143
 144         if (badops)
 145                 {
 146 bad:
 147                 BIO_printf(bio_err,"%s [options] <infile\n",prog);
 148                 BIO_printf(bio_err,"where options are\n");
 149                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
 150                 BIO_printf(bio_err," -in arg       inout file\n");
 151                 BIO_printf(bio_err," -offset arg   offset into file\n");
 152                 BIO_printf(bio_err," -length arg   lenth of section in file\n");
 153                 BIO_printf(bio_err," -i            indent entries\n");
 154                 goto end;
 155                 }
 156
 157         ERR_load_crypto_strings();
 158
 159         in=BIO_new(BIO_s_file());
 160         out=BIO_new(BIO_s_file());
 161         if ((in == NULL) || (out == NULL))
 162                 {
 163                 ERR_print_errors(bio_err);
 164                 goto end;
 165                 }
 166         BIO_set_fp(out,stdout,BIO_NOCLOSE);
 167         if (infile == NULL)
 168                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 169         else
 170                 {
 171                 if (BIO_read_filename(in,infile) <= 0)
 172                         {
 173                         perror(infile);
 174                         goto end;
 175                         }
 176                 }
 177
 178         if ((buf=BUF_MEM_new()) == NULL) goto end;
 179         if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
 180
 181         if (informat == FORMAT_PEM)
 182                 {
 183                 BIO *tmp;
 184
 185                 if ((b64=BIO_new(BIO_f_base64())) == NULL)
 186                         goto end;
 187                 BIO_push(b64,in);
 188                 tmp=in;
 189                 in=b64;
 190                 b64=tmp;
 191                 }
 192
 193         num=0;
 194         for (;;)
 195                 {
 196                 if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
 197                 i=BIO_read(in,&(buf->data[num]),BUFSIZ);
 198                 if (i <= 0) break;
 199                 num+=i;
 200                 }
 201         str=buf->data;
 202
 203         if (length == 0) length=(unsigned int)num;
 204         if (!ASN1_parse(out,(unsigned char *)&(str[offset]),length,indent))
 205                 {
 206                 ERR_print_errors(bio_err);
 207                 goto end;
 208                 }
 209         ret=0;
 210 end:
 211         if (in != NULL) BIO_free(in);
 212         if (out != NULL) BIO_free(out);
 213         if (b64 != NULL) BIO_free(b64);
 214         if (ret != 0)
 215                 ERR_print_errors(bio_err);
 216         if (buf != NULL) BUF_MEM_free(buf);
 217         EXIT(ret);
 218         }
 219