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
MAIN(int argc,char ** argv)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
do_generate(BIO * bio,char * genstr,char * genconf,BUF_MEM * buf)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 }
446