sl@0: /* apps/asn1pars.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: /* A nice addition from Dr Stephen Henson <shenson@bigfoot.com> to 
sl@0:  * add the -strparse option which parses nested binary structures
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <stdlib.h>
sl@0: #include <string.h>
sl@0: #include "apps.h"
sl@0: #include <openssl/err.h>
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/x509.h>
sl@0: #include <openssl/pem.h>
sl@0: 
sl@0: /* -inform arg	- input format - default PEM (DER or PEM)
sl@0:  * -in arg	- input file - default stdin
sl@0:  * -i		- indent the details by depth
sl@0:  * -offset	- where in the file to start
sl@0:  * -length	- how many bytes to use
sl@0:  * -oid file	- extra oid description file
sl@0:  */
sl@0: 
sl@0: #undef PROG
sl@0: #define PROG	asn1parse_main
sl@0: 
sl@0: 
sl@0: 
sl@0: int MAIN(int, char **);
sl@0: 
sl@0: static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
sl@0: 
sl@0: int MAIN(int argc, char **argv)
sl@0: 	{
sl@0: 	int i,badops=0,offset=0,ret=1,j;
sl@0: 	unsigned int length=0;
sl@0: 	long num,tmplen;
sl@0: 	BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
sl@0: 	int informat,indent=0, noout = 0, dump = 0;
sl@0: 	char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL;
sl@0: 	char *genstr=NULL, *genconf=NULL;
sl@0: 	unsigned char *tmpbuf;
sl@0: 	const unsigned char *ctmpbuf;
sl@0: 	BUF_MEM *buf=NULL;
sl@0: 	STACK *osk=NULL;
sl@0: 	ASN1_TYPE *at=NULL;
sl@0: 
sl@0: 	informat=FORMAT_PEM;
sl@0: 
sl@0: 	apps_startup();
sl@0: 
sl@0: 	if (bio_err == NULL)
sl@0: 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
sl@0: 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
sl@0: 
sl@0: 	if (!load_config(bio_err, NULL))
sl@0: 		goto end;
sl@0: 
sl@0: 	prog=argv[0];
sl@0: 	argc--;
sl@0: 	argv++;
sl@0: 	if ((osk=sk_new_null()) == NULL)
sl@0: 		{
sl@0: 		BIO_printf(bio_err,"Memory allocation failure\n");
sl@0: 		goto end;
sl@0: 		}
sl@0: 	while (argc >= 1)
sl@0: 		{
sl@0: 		if 	(strcmp(*argv,"-inform") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			informat=str2fmt(*(++argv));
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-in") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			infile= *(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-out") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			derfile= *(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-i") == 0)
sl@0: 			{
sl@0: 			indent=1;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-noout") == 0) noout = 1;
sl@0: 		else if (strcmp(*argv,"-oid") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			oidfile= *(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-offset") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			offset= atoi(*(++argv));
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-length") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			length= atoi(*(++argv));
sl@0: 			if (length == 0) goto bad;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-dump") == 0)
sl@0: 			{
sl@0: 			dump= -1;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-dlimit") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			dump= atoi(*(++argv));
sl@0: 			if (dump <= 0) goto bad;
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-strparse") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			sk_push(osk,*(++argv));
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-genstr") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			genstr= *(++argv);
sl@0: 			}
sl@0: 		else if (strcmp(*argv,"-genconf") == 0)
sl@0: 			{
sl@0: 			if (--argc < 1) goto bad;
sl@0: 			genconf= *(++argv);
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			BIO_printf(bio_err,"unknown option %s\n",*argv);
sl@0: 			badops=1;
sl@0: 			break;
sl@0: 			}
sl@0: 		argc--;
sl@0: 		argv++;
sl@0: 		}
sl@0: 
sl@0: 	if (badops)
sl@0: 		{
sl@0: bad:
sl@0: 		BIO_printf(bio_err,"%s [options] <infile\n",prog);
sl@0: 		BIO_printf(bio_err,"where options are\n");
sl@0: 		BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
sl@0: 		BIO_printf(bio_err," -in arg       input file\n");
sl@0: 		BIO_printf(bio_err," -out arg      output file (output format is always DER\n");
sl@0: 		BIO_printf(bio_err," -noout arg    don't produce any output\n");
sl@0: 		BIO_printf(bio_err," -offset arg   offset into file\n");
sl@0: 		BIO_printf(bio_err," -length arg   length of section in file\n");
sl@0: 		BIO_printf(bio_err," -i            indent entries\n");
sl@0: 		BIO_printf(bio_err," -dump         dump unknown data in hex form\n");
sl@0: 		BIO_printf(bio_err," -dlimit arg   dump the first arg bytes of unknown data in hex form\n");
sl@0: 		BIO_printf(bio_err," -oid file     file of extra oid definitions\n");
sl@0: 		BIO_printf(bio_err," -strparse offset\n");
sl@0: 		BIO_printf(bio_err,"               a series of these can be used to 'dig' into multiple\n");
sl@0: 		BIO_printf(bio_err,"               ASN1 blob wrappings\n");
sl@0: 		BIO_printf(bio_err," -genstr str   string to generate ASN1 structure from\n");
sl@0: 		BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n");
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: 	ERR_load_crypto_strings();
sl@0: 
sl@0: 	in=BIO_new(BIO_s_file());
sl@0: 	out=BIO_new(BIO_s_file());
sl@0: 	if ((in == NULL) || (out == NULL))
sl@0: 		{
sl@0: 		ERR_print_errors(bio_err);
sl@0: 		goto end;
sl@0: 		}
sl@0: 	BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
sl@0: 	
sl@0: #ifdef OPENSSL_SYS_VMS
sl@0: 	{
sl@0: 	BIO *tmpbio = BIO_new(BIO_f_linebuffer());
sl@0: 	out = BIO_push(tmpbio, out);
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: 	if (oidfile != NULL)
sl@0: 		{
sl@0: 		if (BIO_read_filename(in,oidfile) <= 0)
sl@0: 			{
sl@0: 			BIO_printf(bio_err,"problems opening %s\n",oidfile);
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		OBJ_create_objects(in);
sl@0: 		}
sl@0: 
sl@0: 	if (infile == NULL)
sl@0: 		BIO_set_fp(in,stdin,BIO_NOCLOSE);
sl@0: 	
sl@0: 	else
sl@0: 		{
sl@0: 		if (BIO_read_filename(in,infile) <= 0)
sl@0: 			{
sl@0: 			perror(infile);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	if (derfile) {
sl@0: 		if(!(derout = BIO_new_file(derfile, "wb"))) {
sl@0: 			BIO_printf(bio_err,"problems opening %s\n",derfile);
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 	if ((buf=BUF_MEM_new()) == NULL) goto end;
sl@0: 	if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
sl@0: 
sl@0: 	if (genstr || genconf)
sl@0: 		{
sl@0: 		num = do_generate(bio_err, genstr, genconf, buf);
sl@0: 		if (num < 0)
sl@0: 			{
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	else
sl@0: 		{
sl@0: 
sl@0: 		if (informat == FORMAT_PEM)
sl@0: 			{
sl@0: 			BIO *tmp;
sl@0: 
sl@0: 			if ((b64=BIO_new(BIO_f_base64())) == NULL)
sl@0: 				goto end;
sl@0: 			BIO_push(b64,in);
sl@0: 			tmp=in;
sl@0: 			in=b64;
sl@0: 			b64=tmp;
sl@0: 			}
sl@0: 
sl@0: 		num=0;
sl@0: 		for (;;)
sl@0: 			{
sl@0: 			if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
sl@0: 			i=BIO_read(in,&(buf->data[num]),BUFSIZ);
sl@0: 			if (i <= 0) break;
sl@0: 			num+=i;
sl@0: 			}
sl@0: 		}
sl@0: 	str=buf->data;
sl@0: 
sl@0: 	/* If any structs to parse go through in sequence */
sl@0: 
sl@0: 	if (sk_num(osk))
sl@0: 		{
sl@0: 		tmpbuf=(unsigned char *)str;
sl@0: 		tmplen=num;
sl@0: 		for (i=0; i<sk_num(osk); i++)
sl@0: 			{
sl@0: 			ASN1_TYPE *atmp;
sl@0: 			int typ;
sl@0: 			j=atoi(sk_value(osk,i));
sl@0: 			if (j == 0)
sl@0: 				{
sl@0: 				BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i));
sl@0: 				continue;
sl@0: 				}
sl@0: 			tmpbuf+=j;
sl@0: 			tmplen-=j;
sl@0: 			atmp = at;
sl@0: 			ctmpbuf = tmpbuf;
sl@0: 			at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen);
sl@0: 			ASN1_TYPE_free(atmp);
sl@0: 			if(!at)
sl@0: 				{
sl@0: 				BIO_printf(bio_err,"Error parsing structure\n");
sl@0: 				ERR_print_errors(bio_err);
sl@0: 				goto end;
sl@0: 				}
sl@0: 			typ = ASN1_TYPE_get(at);
sl@0: 			if ((typ == V_ASN1_OBJECT)
sl@0: 				|| (typ == V_ASN1_NULL))
sl@0: 				{
sl@0: 				BIO_printf(bio_err, "Can't parse %s type\n",
sl@0: 					typ == V_ASN1_NULL ? "NULL" : "OBJECT");
sl@0: 				ERR_print_errors(bio_err);
sl@0: 				goto end;
sl@0: 				}
sl@0: 			/* hmm... this is a little evil but it works */
sl@0: 			tmpbuf=at->value.asn1_string->data;
sl@0: 			tmplen=at->value.asn1_string->length;
sl@0: 			}
sl@0: 		str=(char *)tmpbuf;
sl@0: 		num=tmplen;
sl@0: 		}
sl@0: 
sl@0: 	if (offset >= num)
sl@0: 		{
sl@0: 		BIO_printf(bio_err, "Error: offset too large\n");
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: 	num -= offset;
sl@0: 
sl@0: 	if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
sl@0: 	if(derout) {
sl@0: 		if(BIO_write(derout, str + offset, length) != (int)length) {
sl@0: 			BIO_printf(bio_err, "Error writing output\n");
sl@0: 			ERR_print_errors(bio_err);
sl@0: 			goto end;
sl@0: 		}
sl@0: 	}
sl@0: 	if (!noout &&
sl@0: 	    !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
sl@0: 		    indent,dump))
sl@0: 		{
sl@0: 		ERR_print_errors(bio_err);
sl@0: 		goto end;
sl@0: 		}
sl@0: 	ret=0;
sl@0: end:
sl@0: 	BIO_free(derout);
sl@0: 	if (in != NULL) BIO_free(in);
sl@0: 	if (out != NULL) BIO_free_all(out);
sl@0: 	if (b64 != NULL) BIO_free(b64);
sl@0: 	if (ret != 0)
sl@0: 		ERR_print_errors(bio_err);
sl@0: 	if (buf != NULL) BUF_MEM_free(buf);
sl@0: 	if (at != NULL) ASN1_TYPE_free(at);
sl@0: 	if (osk != NULL) sk_free(osk);
sl@0: 	OBJ_cleanup();
sl@0: 	apps_shutdown();
sl@0: 	OPENSSL_EXIT(ret);
sl@0: 	}
sl@0: 
sl@0: static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
sl@0: 	{
sl@0: 	CONF *cnf = NULL;
sl@0: 	int len;
sl@0: 	long errline;
sl@0: 	unsigned char *p;
sl@0: 	ASN1_TYPE *atyp = NULL;
sl@0: 
sl@0: 	if (genconf)
sl@0: 		{
sl@0: 		cnf = NCONF_new(NULL);
sl@0: 		if (!NCONF_load(cnf, genconf, &errline))
sl@0: 			goto conferr;
sl@0: 		if (!genstr)
sl@0: 			genstr = NCONF_get_string(cnf, "default", "asn1");
sl@0: 		if (!genstr)
sl@0: 			{
sl@0: 			BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	atyp = ASN1_generate_nconf(genstr, cnf);
sl@0: 	NCONF_free(cnf);
sl@0: 
sl@0: 	if (!atyp)
sl@0: 		return -1;
sl@0: 
sl@0: 	len = i2d_ASN1_TYPE(atyp, NULL);
sl@0: 
sl@0: 	if (len <= 0)
sl@0: 		goto err;
sl@0: 
sl@0: 	if (!BUF_MEM_grow(buf,len))
sl@0: 		goto err;
sl@0: 
sl@0: 	p=(unsigned char *)buf->data;
sl@0: 
sl@0: 	i2d_ASN1_TYPE(atyp, &p);
sl@0: 
sl@0: 	ASN1_TYPE_free(atyp);
sl@0: 	return len;
sl@0: 
sl@0: 	conferr:
sl@0: 
sl@0: 	if (errline > 0)
sl@0: 		BIO_printf(bio, "Error on line %ld of config file '%s'\n",
sl@0: 							errline, genconf);
sl@0: 	else
sl@0: 		BIO_printf(bio, "Error loading config file '%s'\n", genconf);
sl@0: 
sl@0: 	err:
sl@0: 	NCONF_free(cnf);
sl@0: 	ASN1_TYPE_free(atyp);
sl@0: 
sl@0: 	return -1;
sl@0: 
sl@0: 	}