Annotation of src/usr.bin/openssl/asn1pars.c, Revision 1.3
1.3 ! doug 1: /* $OpenBSD: asn1pars.c,v 1.2 2014/08/28 14:23:52 jsing Exp $ */
1.1 jsing 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 <limits.h>
66: #include <string.h>
67:
68: #include "apps.h"
69:
70: #include <openssl/err.h>
71: #include <openssl/evp.h>
72: #include <openssl/pem.h>
73: #include <openssl/x509.h>
74:
1.3 ! doug 75: static struct {
! 76: char *derfile;
! 77: int dump;
! 78: char *genconf;
! 79: char *genstr;
! 80: int indent;
! 81: char *infile;
! 82: int informat;
! 83: unsigned int length;
! 84: int noout;
! 85: int offset;
! 86: char *oidfile;
! 87: STACK_OF(OPENSSL_STRING) *osk;
! 88: } asn1pars_config;
! 89:
! 90: static int
! 91: asn1pars_opt_dlimit(char *arg)
! 92: {
! 93: const char *errstr;
! 94:
! 95: asn1pars_config.dump = strtonum(arg, 1, INT_MAX, &errstr);
! 96: if (errstr) {
! 97: fprintf(stderr, "-dlimit must be from 1 to INT_MAX: %s\n",
! 98: errstr);
! 99: return (-1);
! 100: }
! 101: return (0);
! 102: }
! 103:
! 104: static int
! 105: asn1pars_opt_length(char *arg)
! 106: {
! 107: const char *errstr;
! 108:
! 109: asn1pars_config.length = strtonum(arg, 1, UINT_MAX, &errstr);
! 110: if (errstr) {
! 111: fprintf(stderr, "-length must be from 1 to UINT_MAX: %s\n",
! 112: errstr);
! 113: return (-1);
! 114: }
! 115: return (0);
! 116: }
! 117:
! 118: static int
! 119: asn1pars_opt_strparse(char *arg)
! 120: {
! 121: if (sk_OPENSSL_STRING_push(asn1pars_config.osk, arg) == 0) {
! 122: fprintf(stderr, "-strparse cannot add argument\n");
! 123: return (-1);
! 124: }
! 125: return (0);
! 126: }
! 127:
! 128: static struct option asn1pars_options[] = {
! 129: {
! 130: .name = "dump",
! 131: .desc = "Dump unknown data in hex form",
! 132: .type = OPTION_VALUE,
! 133: .value = -1,
! 134: .opt.value = &asn1pars_config.dump,
! 135: },
! 136: {
! 137: .name = "dlimit",
! 138: .argname = "num",
! 139: .desc = "Dump the first num bytes of unknown data in hex form",
! 140: .type = OPTION_ARG_FUNC,
! 141: .opt.argfunc = asn1pars_opt_dlimit,
! 142: },
! 143: {
! 144: .name = "genconf",
! 145: .argname = "file",
! 146: .desc = "File to generate ASN.1 structure from",
! 147: .type = OPTION_ARG,
! 148: .opt.arg = &asn1pars_config.genconf,
! 149: },
! 150: {
! 151: .name = "genstr",
! 152: .argname = "string",
! 153: .desc = "String to generate ASN.1 structure from",
! 154: .type = OPTION_ARG,
! 155: .opt.arg = &asn1pars_config.genstr,
! 156: },
! 157: {
! 158: .name = "i",
! 159: .desc = "Indent output according to depth of structures",
! 160: .type = OPTION_FLAG,
! 161: .opt.flag = &asn1pars_config.indent,
! 162: },
! 163: {
! 164: .name = "in",
! 165: .argname = "file",
! 166: .desc = "The input file (default stdin)",
! 167: .type = OPTION_ARG,
! 168: .opt.arg = &asn1pars_config.infile,
! 169: },
! 170: {
! 171: .name = "inform",
! 172: .argname = "fmt",
! 173: .desc = "Input format (DER, TXT or PEM (default))",
! 174: .type = OPTION_ARG_FORMAT,
! 175: .opt.value = &asn1pars_config.informat,
! 176: },
! 177: {
! 178: .name = "length",
! 179: .argname = "num",
! 180: .desc = "Number of bytes to parse (default until EOF)",
! 181: .type = OPTION_ARG_FUNC,
! 182: .opt.argfunc = asn1pars_opt_length,
! 183: },
! 184: {
! 185: .name = "noout",
! 186: .desc = "Do not produce any output",
! 187: .type = OPTION_FLAG,
! 188: .opt.flag = &asn1pars_config.noout,
! 189: },
! 190: {
! 191: .name = "offset",
! 192: .argname = "num",
! 193: .desc = "Offset to begin parsing",
! 194: .type = OPTION_ARG_INT,
! 195: .opt.value = &asn1pars_config.offset,
! 196: },
! 197: {
! 198: .name = "oid",
! 199: .argname = "file",
! 200: .desc = "File containing additional object identifiers (OIDs)",
! 201: .type = OPTION_ARG,
! 202: .opt.arg = &asn1pars_config.oidfile,
! 203: },
! 204: {
! 205: .name = "out",
! 206: .argname = "file",
! 207: .desc = "Output file in DER format",
! 208: .type = OPTION_ARG,
! 209: .opt.arg = &asn1pars_config.derfile,
! 210: },
! 211: {
! 212: .name = "strparse",
! 213: .argname = "offset",
! 214: .desc = "Parse the content octets of ASN.1 object starting at"
! 215: " offset",
! 216: .type = OPTION_ARG_FUNC,
! 217: .opt.argfunc = asn1pars_opt_strparse,
! 218: },
! 219: { NULL },
! 220: };
1.1 jsing 221:
1.3 ! doug 222: static void
! 223: asn1pars_usage()
! 224: {
! 225: fprintf(stderr,
! 226: "usage: asn1parse [-i] [-dlimit num] [-dump] [-genconf file] "
! 227: "[-genstr string]\n"
! 228: " [-in file] [-inform fmt] [-length num] [-noout] [-offset num] "
! 229: "[-oid file]\n"
! 230: " [-out file] [-strparse offset]\n\n");
! 231: options_usage(asn1pars_options);
! 232: }
1.1 jsing 233:
1.3 ! doug 234: static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
1.1 jsing 235:
236: int
237: asn1parse_main(int argc, char **argv)
238: {
1.3 ! doug 239: int i, j, ret = 1;
1.1 jsing 240: long num, tmplen;
241: BIO *in = NULL, *out = NULL, *b64 = NULL, *derout = NULL;
1.3 ! doug 242: char *str = NULL;
1.1 jsing 243: const char *errstr = NULL;
244: unsigned char *tmpbuf;
245: const unsigned char *ctmpbuf;
246: BUF_MEM *buf = NULL;
247: ASN1_TYPE *at = NULL;
248:
1.3 ! doug 249: memset(&asn1pars_config, 0, sizeof(asn1pars_config));
1.1 jsing 250:
1.3 ! doug 251: asn1pars_config.informat = FORMAT_PEM;
! 252: if ((asn1pars_config.osk = sk_OPENSSL_STRING_new_null()) == NULL) {
1.1 jsing 253: BIO_printf(bio_err, "Memory allocation failure\n");
254: goto end;
255: }
256:
1.3 ! doug 257: if (options_parse(argc, argv, asn1pars_options, NULL, NULL) != 0) {
! 258: asn1pars_usage();
! 259: return (1);
1.1 jsing 260: }
261:
262: in = BIO_new(BIO_s_file());
263: out = BIO_new(BIO_s_file());
264: if ((in == NULL) || (out == NULL)) {
265: ERR_print_errors(bio_err);
266: goto end;
267: }
268: BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
269:
1.3 ! doug 270: if (asn1pars_config.oidfile != NULL) {
! 271: if (BIO_read_filename(in, asn1pars_config.oidfile) <= 0) {
! 272: BIO_printf(bio_err, "problems opening %s\n",
! 273: asn1pars_config.oidfile);
1.1 jsing 274: ERR_print_errors(bio_err);
275: goto end;
276: }
277: OBJ_create_objects(in);
278: }
1.3 ! doug 279: if (asn1pars_config.infile == NULL)
1.1 jsing 280: BIO_set_fp(in, stdin, BIO_NOCLOSE);
281: else {
1.3 ! doug 282: if (BIO_read_filename(in, asn1pars_config.infile) <= 0) {
! 283: perror(asn1pars_config.infile);
1.1 jsing 284: goto end;
285: }
286: }
287:
1.3 ! doug 288: if (asn1pars_config.derfile) {
! 289: if (!(derout = BIO_new_file(asn1pars_config.derfile, "wb"))) {
! 290: BIO_printf(bio_err, "problems opening %s\n",
! 291: asn1pars_config.derfile);
1.1 jsing 292: ERR_print_errors(bio_err);
293: goto end;
294: }
295: }
296: if ((buf = BUF_MEM_new()) == NULL)
297: goto end;
298: if (!BUF_MEM_grow(buf, BUFSIZ * 8))
299: goto end; /* Pre-allocate :-) */
300:
1.3 ! doug 301: if (asn1pars_config.genstr || asn1pars_config.genconf) {
! 302: num = do_generate(bio_err, asn1pars_config.genstr,
! 303: asn1pars_config.genconf, buf);
1.1 jsing 304: if (num < 0) {
305: ERR_print_errors(bio_err);
306: goto end;
307: }
308: } else {
309:
1.3 ! doug 310: if (asn1pars_config.informat == FORMAT_PEM) {
1.1 jsing 311: BIO *tmp;
312:
313: if ((b64 = BIO_new(BIO_f_base64())) == NULL)
314: goto end;
315: BIO_push(b64, in);
316: tmp = in;
317: in = b64;
318: b64 = tmp;
319: }
320: num = 0;
321: for (;;) {
322: if (!BUF_MEM_grow(buf, (int) num + BUFSIZ))
323: goto end;
324: i = BIO_read(in, &(buf->data[num]), BUFSIZ);
325: if (i <= 0)
326: break;
327: num += i;
328: }
329: }
330: str = buf->data;
331:
332: /* If any structs to parse go through in sequence */
333:
1.3 ! doug 334: if (sk_OPENSSL_STRING_num(asn1pars_config.osk)) {
1.1 jsing 335: tmpbuf = (unsigned char *) str;
336: tmplen = num;
1.3 ! doug 337: for (i = 0; i < sk_OPENSSL_STRING_num(asn1pars_config.osk);
! 338: i++) {
1.1 jsing 339: ASN1_TYPE *atmp;
340: int typ;
1.3 ! doug 341: j = strtonum(
! 342: sk_OPENSSL_STRING_value(asn1pars_config.osk, i),
1.1 jsing 343: 1, INT_MAX, &errstr);
344: if (errstr) {
345: BIO_printf(bio_err,
346: "'%s' is an invalid number: %s\n",
1.3 ! doug 347: sk_OPENSSL_STRING_value(asn1pars_config.osk,
! 348: i), errstr);
1.1 jsing 349: continue;
350: }
351: tmpbuf += j;
352: tmplen -= j;
353: atmp = at;
354: ctmpbuf = tmpbuf;
355: at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
356: ASN1_TYPE_free(atmp);
357: if (!at) {
358: BIO_printf(bio_err, "Error parsing structure\n");
359: ERR_print_errors(bio_err);
360: goto end;
361: }
362: typ = ASN1_TYPE_get(at);
363: if ((typ == V_ASN1_OBJECT) ||
364: (typ == V_ASN1_NULL)) {
365: BIO_printf(bio_err, "Can't parse %s type\n",
366: typ == V_ASN1_NULL ? "NULL" : "OBJECT");
367: ERR_print_errors(bio_err);
368: goto end;
369: }
370: /* hmm... this is a little evil but it works */
371: tmpbuf = at->value.asn1_string->data;
372: tmplen = at->value.asn1_string->length;
373: }
374: str = (char *) tmpbuf;
375: num = tmplen;
376: }
1.3 ! doug 377: if (asn1pars_config.offset >= num) {
1.1 jsing 378: BIO_printf(bio_err, "Error: offset too large\n");
379: goto end;
380: }
1.3 ! doug 381: num -= asn1pars_config.offset;
1.1 jsing 382:
1.3 ! doug 383: if ((asn1pars_config.length == 0) ||
! 384: ((long)asn1pars_config.length > num))
! 385: asn1pars_config.length = (unsigned int) num;
1.1 jsing 386: if (derout) {
1.3 ! doug 387: if (BIO_write(derout, str + asn1pars_config.offset,
! 388: asn1pars_config.length) != (int)asn1pars_config.length) {
1.1 jsing 389: BIO_printf(bio_err, "Error writing output\n");
390: ERR_print_errors(bio_err);
391: goto end;
392: }
393: }
1.3 ! doug 394: if (!asn1pars_config.noout &&
! 395: !ASN1_parse_dump(out,
! 396: (unsigned char *)&(str[asn1pars_config.offset]),
! 397: asn1pars_config.length, asn1pars_config.indent,
! 398: asn1pars_config.dump)) {
1.1 jsing 399: ERR_print_errors(bio_err);
400: goto end;
401: }
402: ret = 0;
403: end:
404: BIO_free(derout);
1.3 ! doug 405: BIO_free(in);
! 406: BIO_free_all(out);
! 407: BIO_free(b64);
1.1 jsing 408: if (ret != 0)
409: ERR_print_errors(bio_err);
1.3 ! doug 410: BUF_MEM_free(buf);
1.1 jsing 411: if (at != NULL)
412: ASN1_TYPE_free(at);
1.3 ! doug 413: sk_OPENSSL_STRING_free(asn1pars_config.osk);
1.1 jsing 414: OBJ_cleanup();
415:
416: return (ret);
417: }
418:
419: static int
420: do_generate(BIO * bio, char *genstr, char *genconf, BUF_MEM * buf)
421: {
422: CONF *cnf = NULL;
423: int len;
424: long errline;
425: unsigned char *p;
426: ASN1_TYPE *atyp = NULL;
427:
428: if (genconf) {
429: cnf = NCONF_new(NULL);
430: if (!NCONF_load(cnf, genconf, &errline))
431: goto conferr;
432: if (!genstr)
433: genstr = NCONF_get_string(cnf, "default", "asn1");
434: if (!genstr) {
435: BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
436: goto err;
437: }
438: }
439: atyp = ASN1_generate_nconf(genstr, cnf);
440: NCONF_free(cnf);
441: cnf = NULL;
442:
443: if (!atyp)
444: return -1;
445:
446: len = i2d_ASN1_TYPE(atyp, NULL);
447: if (len <= 0)
448: goto err;
449:
450: if (!BUF_MEM_grow(buf, len))
451: goto err;
452:
453: p = (unsigned char *) buf->data;
454:
455: i2d_ASN1_TYPE(atyp, &p);
456:
457: ASN1_TYPE_free(atyp);
458: return len;
459:
460: conferr:
461:
462: if (errline > 0)
463: BIO_printf(bio, "Error on line %ld of config file '%s'\n",
464: errline, genconf);
465: else
466: BIO_printf(bio, "Error loading config file '%s'\n", genconf);
467:
468: err:
469: NCONF_free(cnf);
470: ASN1_TYPE_free(atyp);
471:
472: return -1;
473:
474: }
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