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openssl/apps/asn1pars.c

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/* apps/asn1pars.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* A nice addition from Dr Stephen Henson <steve@openssl.org> to
* add the -strparse option which parses nested binary structures
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
/* -inform arg - input format - default PEM (DER or PEM)
* -in arg - input file - default stdin
* -i - indent the details by depth
* -offset - where in the file to start
* -length - how many bytes to use
* -oid file - extra oid description file
*/
#undef PROG
#define PROG asn1parse_main
/* Minimum buffer size to be used */
#define MIN_BUFFER 256
int MAIN(int, char **);
static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
int MAIN(int argc, char **argv)
{
int i,badops=0,offset=0,ret=1,j;
unsigned int length=0;
long num,tmplen;
BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
int informat,indent=0, noout = 0, dump = 0, strictpem = 0;
char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL;
char *genstr=NULL, *genconf=NULL;
unsigned char *tmpbuf;
const unsigned char *ctmpbuf;
BUF_MEM *buf=NULL;
STACK_OF(OPENSSL_STRING) *osk=NULL;
ASN1_TYPE *at=NULL;
informat=FORMAT_PEM;
apps_startup();
if (bio_err == NULL)
if ((bio_err=BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
if (!load_config(bio_err, NULL))
goto end;
prog=argv[0];
argc--;
argv++;
if ((osk=sk_OPENSSL_STRING_new_null()) == NULL)
{
BIO_printf(bio_err,"Memory allocation failure\n");
goto end;
}
while (argc >= 1)
{
if (strcmp(*argv,"-inform") == 0)
{
if (--argc < 1) goto bad;
informat=str2fmt(*(++argv));
}
else if (strcmp(*argv,"-in") == 0)
{
if (--argc < 1) goto bad;
infile= *(++argv);
}
else if (strcmp(*argv,"-out") == 0)
{
if (--argc < 1) goto bad;
derfile= *(++argv);
}
else if (strcmp(*argv,"-i") == 0)
{
indent=1;
}
else if (strcmp(*argv,"-noout") == 0) noout = 1;
else if (strcmp(*argv,"-oid") == 0)
{
if (--argc < 1) goto bad;
oidfile= *(++argv);
}
else if (strcmp(*argv,"-offset") == 0)
{
if (--argc < 1) goto bad;
offset= atoi(*(++argv));
}
else if (strcmp(*argv,"-length") == 0)
{
if (--argc < 1) goto bad;
length= atoi(*(++argv));
if (length == 0) goto bad;
}
else if (strcmp(*argv,"-dump") == 0)
{
dump= -1;
}
else if (strcmp(*argv,"-dlimit") == 0)
{
if (--argc < 1) goto bad;
dump= atoi(*(++argv));
if (dump <= 0) goto bad;
}
else if (strcmp(*argv,"-strparse") == 0)
{
if (--argc < 1) goto bad;
sk_OPENSSL_STRING_push(osk,*(++argv));
}
else if (strcmp(*argv,"-genstr") == 0)
{
if (--argc < 1) goto bad;
genstr= *(++argv);
}
else if (strcmp(*argv,"-genconf") == 0)
{
if (--argc < 1) goto bad;
genconf= *(++argv);
}
else if (strcmp(*argv,"-strictpem") == 0)
{
strictpem = 1;
informat = FORMAT_PEM;
}
else
{
BIO_printf(bio_err,"unknown option %s\n",*argv);
badops=1;
break;
}
argc--;
argv++;
}
if (badops)
{
bad:
BIO_printf(bio_err,"%s [options] <infile\n",prog);
BIO_printf(bio_err,"where options are\n");
BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
BIO_printf(bio_err," -in arg input file\n");
BIO_printf(bio_err," -out arg output file (output format is always DER\n");
BIO_printf(bio_err," -noout arg don't produce any output\n");
BIO_printf(bio_err," -offset arg offset into file\n");
BIO_printf(bio_err," -length arg length of section in file\n");
BIO_printf(bio_err," -i indent entries\n");
BIO_printf(bio_err," -dump dump unknown data in hex form\n");
BIO_printf(bio_err," -dlimit arg dump the first arg bytes of unknown data in hex form\n");
BIO_printf(bio_err," -oid file file of extra oid definitions\n");
BIO_printf(bio_err," -strparse offset\n");
BIO_printf(bio_err," a series of these can be used to 'dig' into multiple\n");
BIO_printf(bio_err," ASN1 blob wrappings\n");
BIO_printf(bio_err," -genstr str string to generate ASN1 structure from\n");
BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n");
BIO_printf(bio_err," -strictpem do not attempt base64 decode outside PEM markers (-inform \n");
BIO_printf(bio_err," will be ignored)\n");
goto end;
}
ERR_load_crypto_strings();
in=BIO_new(BIO_s_file());
out=BIO_new(BIO_s_file());
if ((in == NULL) || (out == NULL))
{
ERR_print_errors(bio_err);
goto end;
}
BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
#ifdef OPENSSL_SYS_VMS
{
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
out = BIO_push(tmpbio, out);
}
#endif
if (oidfile != NULL)
{
if (BIO_read_filename(in,oidfile) <= 0)
{
BIO_printf(bio_err,"problems opening %s\n",oidfile);
ERR_print_errors(bio_err);
goto end;
}
OBJ_create_objects(in);
}
if (infile == NULL)
BIO_set_fp(in,stdin,BIO_NOCLOSE);
else
{
if (BIO_read_filename(in,infile) <= 0)
{
perror(infile);
goto end;
}
}
if (derfile) {
if(!(derout = BIO_new_file(derfile, "wb"))) {
BIO_printf(bio_err,"problems opening %s\n",derfile);
ERR_print_errors(bio_err);
goto end;
}
}
if ((buf=BUF_MEM_new()) == NULL) goto end;
if (!BUF_MEM_grow(buf,(BUFSIZ*8)<MIN_BUFFER?MIN_BUFFER:(BUFSIZ*8))) goto end; /* Pre-allocate :-) */
if (genstr || genconf)
{
num = do_generate(bio_err, genstr, genconf, buf);
if (num < 0)
{
ERR_print_errors(bio_err);
goto end;
}
}
else
{
if (informat == FORMAT_PEM)
{
BIO *tmp;
if(strictpem)
{
for (;;)
{
/* Read a line */
i=BIO_gets(in,buf->data,MIN_BUFFER-1);
if (i <= 0)
{
BIO_printf(bio_err, "Error: Cannot find start line\n");
goto end;
}
/* Strip trailing spaces etc */
do
i--;
while ((i >= 0) && (buf->data[i] <= ' '));
buf->data[++i]='\0';
/* Check if we have a PEM BEGIN marker */
if (strncmp(buf->data,"-----BEGIN ",11) == 0)
{
if (strncmp(&(buf->data[i-5]),"-----",5) != 0)
continue;
break;
}
}
}
if ((b64=BIO_new(BIO_f_base64())) == NULL)
goto end;
BIO_push(b64,in);
tmp=in;
in=b64;
b64=tmp;
}
num=0;
for (;;)
{
if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
i=BIO_read(in,&(buf->data[num]),BUFSIZ);
if (i <= 0) break;
num+=i;
}
}
str=buf->data;
/* If any structs to parse go through in sequence */
if (sk_OPENSSL_STRING_num(osk))
{
tmpbuf=(unsigned char *)str;
tmplen=num;
for (i=0; i<sk_OPENSSL_STRING_num(osk); i++)
{
ASN1_TYPE *atmp;
int typ;
j=atoi(sk_OPENSSL_STRING_value(osk,i));
if (j == 0)
{
BIO_printf(bio_err,"'%s' is an invalid number\n",sk_OPENSSL_STRING_value(osk,i));
continue;
}
tmpbuf+=j;
tmplen-=j;
atmp = at;
ctmpbuf = tmpbuf;
at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen);
ASN1_TYPE_free(atmp);
if(!at)
{
BIO_printf(bio_err,"Error parsing structure\n");
ERR_print_errors(bio_err);
goto end;
}
typ = ASN1_TYPE_get(at);
if ((typ == V_ASN1_OBJECT)
|| (typ == V_ASN1_NULL))
{
BIO_printf(bio_err, "Can't parse %s type\n",
typ == V_ASN1_NULL ? "NULL" : "OBJECT");
ERR_print_errors(bio_err);
goto end;
}
/* hmm... this is a little evil but it works */
tmpbuf=at->value.asn1_string->data;
tmplen=at->value.asn1_string->length;
}
str=(char *)tmpbuf;
num=tmplen;
}
if (offset >= num)
{
BIO_printf(bio_err, "Error: offset too large\n");
goto end;
}
num -= offset;
if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
if(derout) {
if(BIO_write(derout, str + offset, length) != (int)length) {
BIO_printf(bio_err, "Error writing output\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (!noout &&
!ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
indent,dump))
{
ERR_print_errors(bio_err);
goto end;
}
ret=0;
end:
BIO_free(derout);
if (in != NULL) BIO_free(in);
if (out != NULL) BIO_free_all(out);
if (b64 != NULL) BIO_free(b64);
if (ret != 0)
ERR_print_errors(bio_err);
if (buf != NULL) BUF_MEM_free(buf);
if (at != NULL) ASN1_TYPE_free(at);
if (osk != NULL) sk_OPENSSL_STRING_free(osk);
OBJ_cleanup();
apps_shutdown();
OPENSSL_EXIT(ret);
}
static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
{
CONF *cnf = NULL;
int len;
long errline;
unsigned char *p;
ASN1_TYPE *atyp = NULL;
if (genconf)
{
cnf = NCONF_new(NULL);
if (!NCONF_load(cnf, genconf, &errline))
goto conferr;
if (!genstr)
genstr = NCONF_get_string(cnf, "default", "asn1");
if (!genstr)
{
BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
goto err;
}
}
atyp = ASN1_generate_nconf(genstr, cnf);
NCONF_free(cnf);
cnf = NULL;
if (!atyp)
return -1;
len = i2d_ASN1_TYPE(atyp, NULL);
if (len <= 0)
goto err;
if (!BUF_MEM_grow(buf,len))
goto err;
p=(unsigned char *)buf->data;
i2d_ASN1_TYPE(atyp, &p);
ASN1_TYPE_free(atyp);
return len;
conferr:
if (errline > 0)
BIO_printf(bio, "Error on line %ld of config file '%s'\n",
errline, genconf);
else
BIO_printf(bio, "Error loading config file '%s'\n", genconf);
err:
NCONF_free(cnf);
ASN1_TYPE_free(atyp);
return -1;
}
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