455 lines
14 KiB
C
455 lines
14 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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/*
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* A nice addition from Dr Stephen Henson <steve@openssl.org> to add the
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* -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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/*-
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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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static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
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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, strictpem = 0;
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char *infile = NULL, *str = NULL, *prog, *oidfile = NULL, *derfile =
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NULL, *name = NULL, *header = NULL;
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char *genstr = NULL, *genconf = NULL;
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unsigned char *tmpbuf;
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const unsigned char *ctmpbuf;
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BUF_MEM *buf = NULL;
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STACK_OF(OPENSSL_STRING) *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_OPENSSL_STRING_new_null()) == NULL) {
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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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if (strcmp(*argv, "-inform") == 0) {
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if (--argc < 1)
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goto bad;
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informat = str2fmt(*(++argv));
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} else if (strcmp(*argv, "-in") == 0) {
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if (--argc < 1)
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goto bad;
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infile = *(++argv);
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} else if (strcmp(*argv, "-out") == 0) {
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if (--argc < 1)
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goto bad;
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derfile = *(++argv);
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} else if (strcmp(*argv, "-i") == 0) {
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indent = 1;
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} else if (strcmp(*argv, "-noout") == 0)
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noout = 1;
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else if (strcmp(*argv, "-oid") == 0) {
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if (--argc < 1)
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goto bad;
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oidfile = *(++argv);
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} else if (strcmp(*argv, "-offset") == 0) {
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if (--argc < 1)
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goto bad;
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offset = atoi(*(++argv));
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} else if (strcmp(*argv, "-length") == 0) {
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if (--argc < 1)
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goto bad;
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length = atoi(*(++argv));
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if (length == 0)
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goto bad;
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} else if (strcmp(*argv, "-dump") == 0) {
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dump = -1;
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} else if (strcmp(*argv, "-dlimit") == 0) {
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if (--argc < 1)
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goto bad;
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dump = atoi(*(++argv));
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if (dump <= 0)
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goto bad;
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} else if (strcmp(*argv, "-strparse") == 0) {
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if (--argc < 1)
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goto bad;
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sk_OPENSSL_STRING_push(osk, *(++argv));
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} else if (strcmp(*argv, "-genstr") == 0) {
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if (--argc < 1)
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goto bad;
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genstr = *(++argv);
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} else if (strcmp(*argv, "-genconf") == 0) {
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if (--argc < 1)
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goto bad;
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genconf = *(++argv);
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} else if (strcmp(*argv, "-strictpem") == 0) {
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strictpem = 1;
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informat = FORMAT_PEM;
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} else {
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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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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 PEM\n");
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BIO_printf(bio_err, " -in arg input file\n");
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BIO_printf(bio_err,
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" -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,
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" -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,
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" 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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BIO_printf(bio_err,
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" -genstr str string to generate ASN1 structure from\n");
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BIO_printf(bio_err,
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" -genconf file file to generate ASN1 structure from\n");
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BIO_printf(bio_err,
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" -strictpem do not attempt base64 decode outside PEM markers (-inform \n");
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BIO_printf(bio_err, " will be ignored)\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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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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if (BIO_read_filename(in, oidfile) <= 0) {
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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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if (BIO_read_filename(in, infile) <= 0) {
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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 (strictpem) {
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if (PEM_read_bio(in, &name, &header, (unsigned char **)&str, &num) !=
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1) {
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BIO_printf(bio_err, "Error reading PEM file\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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} else {
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if ((buf = BUF_MEM_new()) == NULL)
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goto end;
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if (!BUF_MEM_grow(buf, BUFSIZ * 8))
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goto end; /* Pre-allocate :-) */
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if (genstr || genconf) {
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num = do_generate(bio_err, genstr, genconf, buf);
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if (num < 0) {
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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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else {
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if (informat == FORMAT_PEM) {
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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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if (!BUF_MEM_grow(buf, (int)num + BUFSIZ))
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goto end;
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i = BIO_read(in, &(buf->data[num]), BUFSIZ);
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if (i <= 0)
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break;
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num += i;
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}
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}
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str = buf->data;
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}
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/* If any structs to parse go through in sequence */
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if (sk_OPENSSL_STRING_num(osk)) {
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tmpbuf = (unsigned char *)str;
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tmplen = num;
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for (i = 0; i < sk_OPENSSL_STRING_num(osk); i++) {
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ASN1_TYPE *atmp;
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int typ;
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j = atoi(sk_OPENSSL_STRING_value(osk, i));
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if (j == 0) {
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BIO_printf(bio_err, "'%s' is an invalid number\n",
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sk_OPENSSL_STRING_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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ctmpbuf = tmpbuf;
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at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
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ASN1_TYPE_free(atmp);
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if (!at) {
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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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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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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))
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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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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)
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BIO_free(in);
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if (out != NULL)
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BIO_free_all(out);
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if (b64 != NULL)
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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)
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BUF_MEM_free(buf);
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if (name != NULL)
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OPENSSL_free(name);
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if (header != NULL)
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OPENSSL_free(header);
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if (strictpem && str != NULL)
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OPENSSL_free(str);
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if (at != NULL)
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ASN1_TYPE_free(at);
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if (osk != NULL)
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sk_OPENSSL_STRING_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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static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
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{
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CONF *cnf = NULL;
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int len;
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long errline;
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unsigned char *p;
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ASN1_TYPE *atyp = NULL;
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if (genconf) {
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cnf = NCONF_new(NULL);
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if (!NCONF_load(cnf, genconf, &errline))
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goto conferr;
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if (!genstr)
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genstr = NCONF_get_string(cnf, "default", "asn1");
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if (!genstr) {
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BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
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goto err;
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}
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}
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atyp = ASN1_generate_nconf(genstr, cnf);
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NCONF_free(cnf);
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cnf = NULL;
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if (!atyp)
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return -1;
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len = i2d_ASN1_TYPE(atyp, NULL);
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if (len <= 0)
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goto err;
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if (!BUF_MEM_grow(buf, len))
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goto err;
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p = (unsigned char *)buf->data;
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i2d_ASN1_TYPE(atyp, &p);
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ASN1_TYPE_free(atyp);
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return len;
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conferr:
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if (errline > 0)
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BIO_printf(bio, "Error on line %ld of config file '%s'\n",
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errline, genconf);
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else
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BIO_printf(bio, "Error loading config file '%s'\n", genconf);
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err:
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NCONF_free(cnf);
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ASN1_TYPE_free(atyp);
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return -1;
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}
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