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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 <shenson@bigfoot.com> 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 | int MAIN(int argc, char **argv) | |
86 | { | |
87 | int i,badops=0,offset=0,ret=1,j; | |
88 | unsigned int length=0; | |
89 | long num,tmplen; | |
90 | BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL; | |
91 | int informat,indent=0, noout = 0, dump = 0; | |
92 | char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL; | |
93 | unsigned char *tmpbuf; | |
94 | BUF_MEM *buf=NULL; | |
95 | STACK *osk=NULL; | |
96 | ASN1_TYPE *at=NULL; | |
97 | ||
98 | informat=FORMAT_PEM; | |
99 | ||
100 | apps_startup(); | |
101 | ||
102 | if (bio_err == NULL) | |
103 | if ((bio_err=BIO_new(BIO_s_file())) != NULL) | |
104 | BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); | |
105 | ||
106 | if (!load_config(bio_err, NULL)) | |
107 | goto end; | |
108 | ||
109 | prog=argv[0]; | |
110 | argc--; | |
111 | argv++; | |
112 | if ((osk=sk_new_null()) == NULL) | |
113 | { | |
114 | BIO_printf(bio_err,"Memory allocation failure\n"); | |
115 | goto end; | |
116 | } | |
117 | while (argc >= 1) | |
118 | { | |
119 | if (strcmp(*argv,"-inform") == 0) | |
120 | { | |
121 | if (--argc < 1) goto bad; | |
122 | informat=str2fmt(*(++argv)); | |
123 | } | |
124 | else if (strcmp(*argv,"-in") == 0) | |
125 | { | |
126 | if (--argc < 1) goto bad; | |
127 | infile= *(++argv); | |
128 | } | |
129 | else if (strcmp(*argv,"-out") == 0) | |
130 | { | |
131 | if (--argc < 1) goto bad; | |
132 | derfile= *(++argv); | |
133 | } | |
134 | else if (strcmp(*argv,"-i") == 0) | |
135 | { | |
136 | indent=1; | |
137 | } | |
138 | else if (strcmp(*argv,"-noout") == 0) noout = 1; | |
139 | else if (strcmp(*argv,"-oid") == 0) | |
140 | { | |
141 | if (--argc < 1) goto bad; | |
142 | oidfile= *(++argv); | |
143 | } | |
144 | else if (strcmp(*argv,"-offset") == 0) | |
145 | { | |
146 | if (--argc < 1) goto bad; | |
147 | offset= atoi(*(++argv)); | |
148 | } | |
149 | else if (strcmp(*argv,"-length") == 0) | |
150 | { | |
151 | if (--argc < 1) goto bad; | |
152 | length= atoi(*(++argv)); | |
153 | if (length == 0) goto bad; | |
154 | } | |
155 | else if (strcmp(*argv,"-dump") == 0) | |
156 | { | |
157 | dump= -1; | |
158 | } | |
159 | else if (strcmp(*argv,"-dlimit") == 0) | |
160 | { | |
161 | if (--argc < 1) goto bad; | |
162 | dump= atoi(*(++argv)); | |
163 | if (dump <= 0) goto bad; | |
164 | } | |
165 | else if (strcmp(*argv,"-strparse") == 0) | |
166 | { | |
167 | if (--argc < 1) goto bad; | |
168 | sk_push(osk,*(++argv)); | |
169 | } | |
170 | else | |
171 | { | |
172 | BIO_printf(bio_err,"unknown option %s\n",*argv); | |
173 | badops=1; | |
174 | break; | |
175 | } | |
176 | argc--; | |
177 | argv++; | |
178 | } | |
179 | ||
180 | if (badops) | |
181 | { | |
182 | bad: | |
183 | BIO_printf(bio_err,"%s [options] <infile\n",prog); | |
184 | BIO_printf(bio_err,"where options are\n"); | |
185 | BIO_printf(bio_err," -inform arg input format - one of DER TXT PEM\n"); | |
186 | BIO_printf(bio_err," -in arg input file\n"); | |
187 | BIO_printf(bio_err," -out arg output file (output format is always DER\n"); | |
188 | BIO_printf(bio_err," -noout arg don't produce any output\n"); | |
189 | BIO_printf(bio_err," -offset arg offset into file\n"); | |
190 | BIO_printf(bio_err," -length arg length of section in file\n"); | |
191 | BIO_printf(bio_err," -i indent entries\n"); | |
192 | BIO_printf(bio_err," -dump dump unknown data in hex form\n"); | |
193 | BIO_printf(bio_err," -dlimit arg dump the first arg bytes of unknown data in hex form\n"); | |
194 | BIO_printf(bio_err," -oid file file of extra oid definitions\n"); | |
195 | BIO_printf(bio_err," -strparse offset\n"); | |
196 | BIO_printf(bio_err," a series of these can be used to 'dig' into multiple\n"); | |
197 | BIO_printf(bio_err," ASN1 blob wrappings\n"); | |
198 | goto end; | |
199 | } | |
200 | ||
201 | ERR_load_crypto_strings(); | |
202 | ||
203 | in=BIO_new(BIO_s_file()); | |
204 | out=BIO_new(BIO_s_file()); | |
205 | if ((in == NULL) || (out == NULL)) | |
206 | { | |
207 | ERR_print_errors(bio_err); | |
208 | goto end; | |
209 | } | |
210 | BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT); | |
211 | #ifdef OPENSSL_SYS_VMS | |
212 | { | |
213 | BIO *tmpbio = BIO_new(BIO_f_linebuffer()); | |
214 | out = BIO_push(tmpbio, out); | |
215 | } | |
216 | #endif | |
217 | ||
218 | if (oidfile != NULL) | |
219 | { | |
220 | if (BIO_read_filename(in,oidfile) <= 0) | |
221 | { | |
222 | BIO_printf(bio_err,"problems opening %s\n",oidfile); | |
223 | ERR_print_errors(bio_err); | |
224 | goto end; | |
225 | } | |
226 | OBJ_create_objects(in); | |
227 | } | |
228 | ||
229 | if (infile == NULL) | |
230 | BIO_set_fp(in,stdin,BIO_NOCLOSE); | |
231 | else | |
232 | { | |
233 | if (BIO_read_filename(in,infile) <= 0) | |
234 | { | |
235 | perror(infile); | |
236 | goto end; | |
237 | } | |
238 | } | |
239 | ||
240 | if (derfile) { | |
241 | if(!(derout = BIO_new_file(derfile, "wb"))) { | |
242 | BIO_printf(bio_err,"problems opening %s\n",derfile); | |
243 | ERR_print_errors(bio_err); | |
244 | goto end; | |
245 | } | |
246 | } | |
247 | ||
248 | if ((buf=BUF_MEM_new()) == NULL) goto end; | |
249 | if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */ | |
250 | ||
251 | if (informat == FORMAT_PEM) | |
252 | { | |
253 | BIO *tmp; | |
254 | ||
255 | if ((b64=BIO_new(BIO_f_base64())) == NULL) | |
256 | goto end; | |
257 | BIO_push(b64,in); | |
258 | tmp=in; | |
259 | in=b64; | |
260 | b64=tmp; | |
261 | } | |
262 | ||
263 | num=0; | |
264 | for (;;) | |
265 | { | |
266 | if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end; | |
267 | i=BIO_read(in,&(buf->data[num]),BUFSIZ); | |
268 | if (i <= 0) break; | |
269 | num+=i; | |
270 | } | |
271 | str=buf->data; | |
272 | ||
273 | /* If any structs to parse go through in sequence */ | |
274 | ||
275 | if (sk_num(osk)) | |
276 | { | |
277 | tmpbuf=(unsigned char *)str; | |
278 | tmplen=num; | |
279 | for (i=0; i<sk_num(osk); i++) | |
280 | { | |
281 | ASN1_TYPE *atmp; | |
282 | j=atoi(sk_value(osk,i)); | |
283 | if (j == 0) | |
284 | { | |
285 | BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i)); | |
286 | continue; | |
287 | } | |
288 | tmpbuf+=j; | |
289 | tmplen-=j; | |
290 | atmp = at; | |
291 | at = d2i_ASN1_TYPE(NULL,&tmpbuf,tmplen); | |
292 | ASN1_TYPE_free(atmp); | |
293 | if(!at) | |
294 | { | |
295 | BIO_printf(bio_err,"Error parsing structure\n"); | |
296 | ERR_print_errors(bio_err); | |
297 | goto end; | |
298 | } | |
299 | /* hmm... this is a little evil but it works */ | |
300 | tmpbuf=at->value.asn1_string->data; | |
301 | tmplen=at->value.asn1_string->length; | |
302 | } | |
303 | str=(char *)tmpbuf; | |
304 | num=tmplen; | |
305 | } | |
306 | ||
307 | if (length == 0) length=(unsigned int)num; | |
308 | if(derout) { | |
309 | if(BIO_write(derout, str + offset, length) != (int)length) { | |
310 | BIO_printf(bio_err, "Error writing output\n"); | |
311 | ERR_print_errors(bio_err); | |
312 | goto end; | |
313 | } | |
314 | } | |
315 | if (!noout && | |
316 | !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length, | |
317 | indent,dump)) | |
318 | { | |
319 | ERR_print_errors(bio_err); | |
320 | goto end; | |
321 | } | |
322 | ret=0; | |
323 | end: | |
324 | BIO_free(derout); | |
325 | if (in != NULL) BIO_free(in); | |
326 | if (out != NULL) BIO_free_all(out); | |
327 | if (b64 != NULL) BIO_free(b64); | |
328 | if (ret != 0) | |
329 | ERR_print_errors(bio_err); | |
330 | if (buf != NULL) BUF_MEM_free(buf); | |
331 | if (at != NULL) ASN1_TYPE_free(at); | |
332 | if (osk != NULL) sk_free(osk); | |
333 | OBJ_cleanup(); | |
334 | apps_shutdown(); | |
335 | EXIT(ret); | |
336 | } | |
337 |