1/* apps/asn1pars.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59/* A nice addition from Dr Stephen Henson <steve@openssl.org> to 60 * add the -strparse option which parses nested binary structures 61 */ 62 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include "apps.h" 67#include <openssl/err.h> 68#include <openssl/evp.h> 69#include <openssl/x509.h> 70#include <openssl/pem.h> 71 72/* -inform arg - input format - default PEM (DER or PEM) 73 * -in arg - input file - default stdin 74 * -i - indent the details by depth 75 * -offset - where in the file to start 76 * -length - how many bytes to use 77 * -oid file - extra oid description file 78 */ 79 80#undef PROG 81#define PROG asn1parse_main 82 83int MAIN(int, char **); 84 85static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf); 86 87int MAIN(int argc, char **argv) 88 { 89 int i,badops=0,offset=0,ret=1,j; 90 unsigned int length=0; 91 long num,tmplen; 92 BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL; 93 int informat,indent=0, noout = 0, dump = 0; 94 char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL; 95 char *genstr=NULL, *genconf=NULL; 96 unsigned char *tmpbuf; 97 const unsigned char *ctmpbuf; 98 BUF_MEM *buf=NULL; 99 STACK_OF(OPENSSL_STRING) *osk=NULL; 100 ASN1_TYPE *at=NULL; 101 102 informat=FORMAT_PEM; 103 104 apps_startup(); 105 106 if (bio_err == NULL) 107 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 108 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 109 110 if (!load_config(bio_err, NULL)) 111 goto end; 112 113 prog=argv[0]; 114 argc--; 115 argv++; 116 if ((osk=sk_OPENSSL_STRING_new_null()) == NULL) 117 { 118 BIO_printf(bio_err,"Memory allocation failure\n"); 119 goto end; 120 } 121 while (argc >= 1) 122 { 123 if (strcmp(*argv,"-inform") == 0) 124 { 125 if (--argc < 1) goto bad; 126 informat=str2fmt(*(++argv)); 127 } 128 else if (strcmp(*argv,"-in") == 0) 129 { 130 if (--argc < 1) goto bad; 131 infile= *(++argv); 132 } 133 else if (strcmp(*argv,"-out") == 0) 134 { 135 if (--argc < 1) goto bad; 136 derfile= *(++argv); 137 } 138 else if (strcmp(*argv,"-i") == 0) 139 { 140 indent=1; 141 } 142 else if (strcmp(*argv,"-noout") == 0) noout = 1; 143 else if (strcmp(*argv,"-oid") == 0) 144 { 145 if (--argc < 1) goto bad; 146 oidfile= *(++argv); 147 } 148 else if (strcmp(*argv,"-offset") == 0) 149 { 150 if (--argc < 1) goto bad; 151 offset= atoi(*(++argv)); 152 } 153 else if (strcmp(*argv,"-length") == 0) 154 { 155 if (--argc < 1) goto bad; 156 length= atoi(*(++argv)); 157 if (length == 0) goto bad; 158 } 159 else if (strcmp(*argv,"-dump") == 0) 160 { 161 dump= -1; 162 } 163 else if (strcmp(*argv,"-dlimit") == 0) 164 { 165 if (--argc < 1) goto bad; 166 dump= atoi(*(++argv)); 167 if (dump <= 0) goto bad; 168 } 169 else if (strcmp(*argv,"-strparse") == 0) 170 { 171 if (--argc < 1) goto bad; 172 sk_OPENSSL_STRING_push(osk,*(++argv)); 173 } 174 else if (strcmp(*argv,"-genstr") == 0) 175 { 176 if (--argc < 1) goto bad; 177 genstr= *(++argv); 178 } 179 else if (strcmp(*argv,"-genconf") == 0) 180 { 181 if (--argc < 1) goto bad; 182 genconf= *(++argv); 183 } 184 else 185 { 186 BIO_printf(bio_err,"unknown option %s\n",*argv); 187 badops=1; 188 break; 189 } 190 argc--; 191 argv++; 192 } 193 194 if (badops) 195 { 196bad: 197 BIO_printf(bio_err,"%s [options] <infile\n",prog); 198 BIO_printf(bio_err,"where options are\n"); 199 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 200 BIO_printf(bio_err," -in arg input file\n"); 201 BIO_printf(bio_err," -out arg output file (output format is always DER\n"); 202 BIO_printf(bio_err," -noout arg don't produce any output\n"); 203 BIO_printf(bio_err," -offset arg offset into file\n"); 204 BIO_printf(bio_err," -length arg length of section in file\n"); 205 BIO_printf(bio_err," -i indent entries\n"); 206 BIO_printf(bio_err," -dump dump unknown data in hex form\n"); 207 BIO_printf(bio_err," -dlimit arg dump the first arg bytes of unknown data in hex form\n"); 208 BIO_printf(bio_err," -oid file file of extra oid definitions\n"); 209 BIO_printf(bio_err," -strparse offset\n"); 210 BIO_printf(bio_err," a series of these can be used to 'dig' into multiple\n"); 211 BIO_printf(bio_err," ASN1 blob wrappings\n"); 212 BIO_printf(bio_err," -genstr str string to generate ASN1 structure from\n"); 213 BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n"); 214 goto end; 215 } 216 217 ERR_load_crypto_strings(); 218 219 in=BIO_new(BIO_s_file()); 220 out=BIO_new(BIO_s_file()); 221 if ((in == NULL) || (out == NULL)) 222 { 223 ERR_print_errors(bio_err); 224 goto end; 225 } 226 BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT); 227#ifdef OPENSSL_SYS_VMS 228 { 229 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 230 out = BIO_push(tmpbio, out); 231 } 232#endif 233 234 if (oidfile != NULL) 235 { 236 if (BIO_read_filename(in,oidfile) <= 0) 237 { 238 BIO_printf(bio_err,"problems opening %s\n",oidfile); 239 ERR_print_errors(bio_err); 240 goto end; 241 } 242 OBJ_create_objects(in); 243 } 244 245 if (infile == NULL) 246 BIO_set_fp(in,stdin,BIO_NOCLOSE); 247 else 248 { 249 if (BIO_read_filename(in,infile) <= 0) 250 { 251 perror(infile); 252 goto end; 253 } 254 } 255 256 if (derfile) { 257 if(!(derout = BIO_new_file(derfile, "wb"))) { 258 BIO_printf(bio_err,"problems opening %s\n",derfile); 259 ERR_print_errors(bio_err); 260 goto end; 261 } 262 } 263 264 if ((buf=BUF_MEM_new()) == NULL) goto end; 265 if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */ 266 267 if (genstr || genconf) 268 { 269 num = do_generate(bio_err, genstr, genconf, buf); 270 if (num < 0) 271 { 272 ERR_print_errors(bio_err); 273 goto end; 274 } 275 } 276 277 else 278 { 279 280 if (informat == FORMAT_PEM) 281 { 282 BIO *tmp; 283 284 if ((b64=BIO_new(BIO_f_base64())) == NULL) 285 goto end; 286 BIO_push(b64,in); 287 tmp=in; 288 in=b64; 289 b64=tmp; 290 } 291 292 num=0; 293 for (;;) 294 { 295 if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end; 296 i=BIO_read(in,&(buf->data[num]),BUFSIZ); 297 if (i <= 0) break; 298 num+=i; 299 } 300 } 301 str=buf->data; 302 303 /* If any structs to parse go through in sequence */ 304 305 if (sk_OPENSSL_STRING_num(osk)) 306 { 307 tmpbuf=(unsigned char *)str; 308 tmplen=num; 309 for (i=0; i<sk_OPENSSL_STRING_num(osk); i++) 310 { 311 ASN1_TYPE *atmp; 312 int typ; 313 j=atoi(sk_OPENSSL_STRING_value(osk,i)); 314 if (j == 0) 315 { 316 BIO_printf(bio_err,"'%s' is an invalid number\n",sk_OPENSSL_STRING_value(osk,i)); 317 continue; 318 } 319 tmpbuf+=j; 320 tmplen-=j; 321 atmp = at; 322 ctmpbuf = tmpbuf; 323 at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen); 324 ASN1_TYPE_free(atmp); 325 if(!at) 326 { 327 BIO_printf(bio_err,"Error parsing structure\n"); 328 ERR_print_errors(bio_err); 329 goto end; 330 } 331 typ = ASN1_TYPE_get(at); 332 if ((typ == V_ASN1_OBJECT) 333 || (typ == V_ASN1_NULL)) 334 { 335 BIO_printf(bio_err, "Can't parse %s type\n", 336 typ == V_ASN1_NULL ? "NULL" : "OBJECT"); 337 ERR_print_errors(bio_err); 338 goto end; 339 } 340 /* hmm... this is a little evil but it works */ 341 tmpbuf=at->value.asn1_string->data; 342 tmplen=at->value.asn1_string->length; 343 } 344 str=(char *)tmpbuf; 345 num=tmplen; 346 } 347 348 if (offset >= num) 349 { 350 BIO_printf(bio_err, "Error: offset too large\n"); 351 goto end; 352 } 353 354 num -= offset; 355 356 if ((length == 0) || ((long)length > num)) length=(unsigned int)num; 357 if(derout) { 358 if(BIO_write(derout, str + offset, length) != (int)length) { 359 BIO_printf(bio_err, "Error writing output\n"); 360 ERR_print_errors(bio_err); 361 goto end; 362 } 363 } 364 if (!noout && 365 !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length, 366 indent,dump)) 367 { 368 ERR_print_errors(bio_err); 369 goto end; 370 } 371 ret=0; 372end: 373 BIO_free(derout); 374 if (in != NULL) BIO_free(in); 375 if (out != NULL) BIO_free_all(out); 376 if (b64 != NULL) BIO_free(b64); 377 if (ret != 0) 378 ERR_print_errors(bio_err); 379 if (buf != NULL) BUF_MEM_free(buf); 380 if (at != NULL) ASN1_TYPE_free(at); 381 if (osk != NULL) sk_OPENSSL_STRING_free(osk); 382 OBJ_cleanup(); 383 apps_shutdown(); 384 OPENSSL_EXIT(ret); 385 } 386 387static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf) 388 { 389 CONF *cnf = NULL; 390 int len; 391 long errline; 392 unsigned char *p; 393 ASN1_TYPE *atyp = NULL; 394 395 if (genconf) 396 { 397 cnf = NCONF_new(NULL); 398 if (!NCONF_load(cnf, genconf, &errline)) 399 goto conferr; 400 if (!genstr) 401 genstr = NCONF_get_string(cnf, "default", "asn1"); 402 if (!genstr) 403 { 404 BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf); 405 goto err; 406 } 407 } 408 409 atyp = ASN1_generate_nconf(genstr, cnf); 410 NCONF_free(cnf); 411 cnf = NULL; 412 413 if (!atyp) 414 return -1; 415 416 len = i2d_ASN1_TYPE(atyp, NULL); 417 418 if (len <= 0) 419 goto err; 420 421 if (!BUF_MEM_grow(buf,len)) 422 goto err; 423 424 p=(unsigned char *)buf->data; 425 426 i2d_ASN1_TYPE(atyp, &p); 427 428 ASN1_TYPE_free(atyp); 429 return len; 430 431 conferr: 432 433 if (errline > 0) 434 BIO_printf(bio, "Error on line %ld of config file '%s'\n", 435 errline, genconf); 436 else 437 BIO_printf(bio, "Error loading config file '%s'\n", genconf); 438 439 err: 440 NCONF_free(cnf); 441 ASN1_TYPE_free(atyp); 442 443 return -1; 444 445 } 446