356 lines
9.7 KiB
C
356 lines
9.7 KiB
C
/* apps/asn1pars.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* A nice addition from Dr Stephen Henson <shenson@bigfoot.com> to
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* add the -strparse option which parses nested binary structures
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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/* -inform arg - input format - default PEM (DER or PEM)
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* -in arg - input file - default stdin
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* -i - indent the details by depth
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* -offset - where in the file to start
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* -length - how many bytes to use
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* -oid file - extra oid description file
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*/
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#undef PROG
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#define PROG asn1parse_main
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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int i,badops=0,offset=0,ret=1,j;
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unsigned int length=0;
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long num,tmplen;
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BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
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int informat,indent=0, noout = 0, dump = 0;
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char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL;
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unsigned char *tmpbuf;
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BUF_MEM *buf=NULL;
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STACK *osk=NULL;
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ASN1_TYPE *at=NULL;
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informat=FORMAT_PEM;
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apps_startup();
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if (bio_err == NULL)
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if ((bio_err=BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
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if (!load_config(bio_err, NULL))
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goto end;
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prog=argv[0];
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argc--;
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argv++;
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if ((osk=sk_new_null()) == NULL)
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{
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BIO_printf(bio_err,"Memory allocation failure\n");
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goto end;
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}
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while (argc >= 1)
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{
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if (strcmp(*argv,"-inform") == 0)
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{
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if (--argc < 1) goto bad;
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informat=str2fmt(*(++argv));
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}
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else if (strcmp(*argv,"-in") == 0)
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{
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if (--argc < 1) goto bad;
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infile= *(++argv);
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}
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else if (strcmp(*argv,"-out") == 0)
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{
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if (--argc < 1) goto bad;
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derfile= *(++argv);
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}
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else if (strcmp(*argv,"-i") == 0)
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{
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indent=1;
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}
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else if (strcmp(*argv,"-noout") == 0) noout = 1;
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else if (strcmp(*argv,"-oid") == 0)
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{
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if (--argc < 1) goto bad;
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oidfile= *(++argv);
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}
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else if (strcmp(*argv,"-offset") == 0)
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{
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if (--argc < 1) goto bad;
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offset= atoi(*(++argv));
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}
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else if (strcmp(*argv,"-length") == 0)
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{
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if (--argc < 1) goto bad;
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length= atoi(*(++argv));
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if (length == 0) goto bad;
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}
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else if (strcmp(*argv,"-dump") == 0)
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{
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dump= -1;
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}
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else if (strcmp(*argv,"-dlimit") == 0)
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{
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if (--argc < 1) goto bad;
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dump= atoi(*(++argv));
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if (dump <= 0) goto bad;
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}
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else if (strcmp(*argv,"-strparse") == 0)
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{
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if (--argc < 1) goto bad;
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sk_push(osk,*(++argv));
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}
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else
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{
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BIO_printf(bio_err,"unknown option %s\n",*argv);
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badops=1;
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break;
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}
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argc--;
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argv++;
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}
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if (badops)
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{
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bad:
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BIO_printf(bio_err,"%s [options] <infile\n",prog);
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BIO_printf(bio_err,"where options are\n");
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BIO_printf(bio_err," -inform arg input format - one of DER TXT PEM\n");
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BIO_printf(bio_err," -in arg input file\n");
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BIO_printf(bio_err," -out arg output file (output format is always DER\n");
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BIO_printf(bio_err," -noout arg don't produce any output\n");
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BIO_printf(bio_err," -offset arg offset into file\n");
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BIO_printf(bio_err," -length arg length of section in file\n");
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BIO_printf(bio_err," -i indent entries\n");
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BIO_printf(bio_err," -dump dump unknown data in hex form\n");
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BIO_printf(bio_err," -dlimit arg dump the first arg bytes of unknown data in hex form\n");
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BIO_printf(bio_err," -oid file file of extra oid definitions\n");
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BIO_printf(bio_err," -strparse offset\n");
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BIO_printf(bio_err," a series of these can be used to 'dig' into multiple\n");
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BIO_printf(bio_err," ASN1 blob wrappings\n");
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goto end;
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}
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ERR_load_crypto_strings();
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in=BIO_new(BIO_s_file());
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out=BIO_new(BIO_s_file());
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if ((in == NULL) || (out == NULL))
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{
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ERR_print_errors(bio_err);
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goto end;
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}
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BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
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#ifdef OPENSSL_SYS_VMS
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{
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BIO *tmpbio = BIO_new(BIO_f_linebuffer());
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out = BIO_push(tmpbio, out);
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}
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#endif
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if (oidfile != NULL)
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{
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if (BIO_read_filename(in,oidfile) <= 0)
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{
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BIO_printf(bio_err,"problems opening %s\n",oidfile);
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ERR_print_errors(bio_err);
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goto end;
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}
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OBJ_create_objects(in);
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}
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if (infile == NULL)
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BIO_set_fp(in,stdin,BIO_NOCLOSE);
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else
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{
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if (BIO_read_filename(in,infile) <= 0)
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{
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perror(infile);
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goto end;
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}
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}
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if (derfile) {
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if(!(derout = BIO_new_file(derfile, "wb"))) {
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BIO_printf(bio_err,"problems opening %s\n",derfile);
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if ((buf=BUF_MEM_new()) == NULL) goto end;
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if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
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if (informat == FORMAT_PEM)
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{
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BIO *tmp;
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if ((b64=BIO_new(BIO_f_base64())) == NULL)
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goto end;
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BIO_push(b64,in);
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tmp=in;
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in=b64;
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b64=tmp;
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}
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num=0;
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for (;;)
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{
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if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
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i=BIO_read(in,&(buf->data[num]),BUFSIZ);
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if (i <= 0) break;
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num+=i;
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}
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str=buf->data;
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/* If any structs to parse go through in sequence */
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if (sk_num(osk))
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{
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tmpbuf=(unsigned char *)str;
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tmplen=num;
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for (i=0; i<sk_num(osk); i++)
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{
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int typ;
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ASN1_TYPE *atmp;
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j=atoi(sk_value(osk,i));
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if (j == 0)
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{
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BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i));
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continue;
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}
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tmpbuf+=j;
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tmplen-=j;
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atmp = at;
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at = d2i_ASN1_TYPE(NULL,&tmpbuf,tmplen);
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ASN1_TYPE_free(atmp);
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if(!at)
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{
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BIO_printf(bio_err,"Error parsing structure\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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typ = ASN1_TYPE_get(at);
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if ((typ == V_ASN1_OBJECT)
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|| (typ == V_ASN1_NULL))
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{
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BIO_printf(bio_err, "Can't parse %s type\n",
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typ == V_ASN1_NULL ? "NULL" : "OBJECT");
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ERR_print_errors(bio_err);
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goto end;
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}
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/* hmm... this is a little evil but it works */
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tmpbuf=at->value.asn1_string->data;
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tmplen=at->value.asn1_string->length;
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}
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str=(char *)tmpbuf;
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num=tmplen;
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}
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if (offset >= num)
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{
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BIO_printf(bio_err, "Error: offset too large\n");
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goto end;
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}
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num -= offset;
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if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
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if(derout) {
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if(BIO_write(derout, str + offset, length) != (int)length) {
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BIO_printf(bio_err, "Error writing output\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if (!noout &&
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!ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
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indent,dump))
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{
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ERR_print_errors(bio_err);
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goto end;
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}
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ret=0;
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end:
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BIO_free(derout);
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if (in != NULL) BIO_free(in);
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if (out != NULL) BIO_free_all(out);
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if (b64 != NULL) BIO_free(b64);
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if (ret != 0)
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ERR_print_errors(bio_err);
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if (buf != NULL) BUF_MEM_free(buf);
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if (at != NULL) ASN1_TYPE_free(at);
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if (osk != NULL) sk_free(osk);
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OBJ_cleanup();
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apps_shutdown();
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OPENSSL_EXIT(ret);
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}
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