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bdd58d9846
The different apps had the liberty to decide whether they would open their input and output files in binary mode or not, which could be confusing if two different apps were handling the same type of file in different ways. The solution is to centralise the decision of low level file organisation, and that the apps would use a selection of formats to state the intent of the file. Reviewed-by: Tim Hudson <tjh@openssl.org>
381 lines
12 KiB
C
381 lines
12 KiB
C
/* 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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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_INFORM, OPT_IN, OPT_OUT, OPT_INDENT, OPT_NOOUT,
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OPT_OID, OPT_OFFSET, OPT_LENGTH, OPT_DUMP, OPT_DLIMIT,
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OPT_STRPARSE, OPT_GENSTR, OPT_GENCONF, OPT_STRICTPEM
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} OPTION_CHOICE;
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OPTIONS asn1parse_options[] = {
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{"help", OPT_HELP, '-', "Display this summary"},
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{"inform", OPT_INFORM, 'F', "input format - one of DER PEM"},
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{"in", OPT_IN, '<', "input file"},
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{"out", OPT_OUT, '>', "output file (output format is always DER)"},
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{"i", OPT_INDENT, 0, "entries"},
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{"noout", OPT_NOOUT, 0, "don't produce any output"},
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{"offset", OPT_OFFSET, 'p', "offset into file"},
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{"length", OPT_LENGTH, 'p', "length of section in file"},
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{"oid", OPT_OID, '<', "file of extra oid definitions"},
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{"dump", OPT_DUMP, 0, "unknown data in hex form"},
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{"dlimit", OPT_DLIMIT, 'p',
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"dump the first arg bytes of unknown data in hex form"},
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{"strparse", OPT_STRPARSE, 's',
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"offset; a series of these can be used to 'dig'"},
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{OPT_MORE_STR, 0, 0, "into multiple ASN1 blob wrappings"},
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{"genstr", OPT_GENSTR, 's', "string to generate ASN1 structure from"},
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{"genconf", OPT_GENCONF, 's', "file to generate ASN1 structure from"},
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{OPT_MORE_STR, 0, 0, "(-inform will be ignored)"},
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{"strictpem", OPT_STRICTPEM, 0,
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"do not attempt base64 decode outside PEM markers"},
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{NULL}
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};
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static int do_generate(char *genstr, char *genconf, BUF_MEM *buf);
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int asn1parse_main(int argc, char **argv)
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{
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ASN1_TYPE *at = NULL;
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BIO *in = NULL, *b64 = NULL, *derout = NULL;
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BUF_MEM *buf = NULL;
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STACK_OF(OPENSSL_STRING) *osk = NULL;
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char *genstr = NULL, *genconf = NULL;
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char *infile = NULL, *str = NULL, *oidfile = NULL, *derfile = NULL;
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char *name = NULL, *header = NULL, *prog;
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const unsigned char *ctmpbuf;
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int indent = 0, noout = 0, dump = 0, strictpem = 0, informat = FORMAT_PEM;
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int offset = 0, ret = 1, i, j;
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long num, tmplen;
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unsigned char *tmpbuf;
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unsigned int length = 0;
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OPTION_CHOICE o;
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prog = opt_init(argc, argv, asn1parse_options);
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if ((osk = sk_OPENSSL_STRING_new_null()) == NULL) {
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BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
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goto end;
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}
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(asn1parse_options);
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ret = 0;
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goto end;
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case OPT_INFORM:
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if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
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goto opthelp;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUT:
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derfile = opt_arg();
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break;
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case OPT_INDENT:
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indent = 1;
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break;
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case OPT_NOOUT:
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noout = 1;
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break;
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case OPT_OID:
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oidfile = opt_arg();
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break;
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case OPT_OFFSET:
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offset = strtol(opt_arg(), NULL, 0);
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break;
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case OPT_LENGTH:
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length = atoi(opt_arg());
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break;
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case OPT_DUMP:
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dump = -1;
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break;
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case OPT_DLIMIT:
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dump = atoi(opt_arg());
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break;
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case OPT_STRPARSE:
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sk_OPENSSL_STRING_push(osk, opt_arg());
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break;
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case OPT_GENSTR:
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genstr = opt_arg();
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break;
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case OPT_GENCONF:
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genconf = opt_arg();
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break;
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case OPT_STRICTPEM:
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strictpem = 1;
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informat = FORMAT_PEM;
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (!app_load_modules(NULL))
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goto end;
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if (oidfile != NULL) {
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in = bio_open_default(oidfile, 'r', FORMAT_TEXT);
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if (in == NULL)
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goto end;
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OBJ_create_objects(in);
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BIO_free(in);
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}
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if ((in = bio_open_default(infile, 'r', informat)) == NULL)
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goto end;
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if (derfile && (derout = bio_open_default(derfile, 'w', FORMAT_ASN1)) == NULL)
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goto end;
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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(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(bio_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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BIO_free(in);
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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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BUF_MEM_free(buf);
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OPENSSL_free(name);
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OPENSSL_free(header);
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if (strictpem)
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OPENSSL_free(str);
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ASN1_TYPE_free(at);
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sk_OPENSSL_STRING_free(osk);
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OBJ_cleanup();
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return (ret);
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}
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static int do_generate(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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unsigned char *p;
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ASN1_TYPE *atyp = NULL;
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if (genconf) {
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if ((cnf = app_load_config(genconf)) == NULL)
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goto err;
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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_err, "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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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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