/* 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 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; 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 *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_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_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 { 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"); 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)) 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 ((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_num(osk)) { tmpbuf=(unsigned char *)str; tmplen=num; for (i=0; i<sk_num(osk); i++) { ASN1_TYPE *atmp; int typ; j=atoi(sk_value(osk,i)); if (j == 0) { BIO_printf(bio_err,"'%s' is an invalid number\n",sk_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_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); 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; }