Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |
| 83 | int MAIN(int, char **); |
| 84 | |
| 85 | static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf); |
| 86 | |
| 87 | int 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 | { |
| 196 | bad: |
| 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; |
| 372 | end: |
| 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 | |
| 387 | static 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 | } |