source: heimdal/trunk/lib/asn1/asn1_print.c

Last change on this file was 1, checked in by Paul Smedley, 10 years ago

Initial commit of Heimdal 1.5.3
File size: 9.2 KB
Line 
1/*
2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "der_locl.h"
37#include <com_err.h>
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <getarg.h>
41#include <err.h>
42#include <der.h>
43
44static int indent_flag = 1;
45static int inner_flag = 0;
46
47static unsigned long indefinite_form_loop;
48static unsigned long indefinite_form_loop_max = 10000;
49
50static size_t
51loop (unsigned char *buf, size_t len, int indent)
52{
53 unsigned char *start_buf = buf;
54
55 while (len > 0) {
56 int ret;
57 Der_class class;
58 Der_type type;
59 unsigned int tag;
60 size_t sz;
61 size_t length;
62 size_t loop_length = 0;
63 int end_tag = 0;
64 const char *tagname;
65
66 ret = der_get_tag (buf, len, &class, &type, &tag, &sz);
67 if (ret)
68 errx (1, "der_get_tag: %s", error_message (ret));
69 if (sz > len)
70 errx (1, "unreasonable length (%u) > %u",
71 (unsigned)sz, (unsigned)len);
72 buf += sz;
73 len -= sz;
74 if (indent_flag) {
75 int i;
76 for (i = 0; i < indent; ++i)
77 printf (" ");
78 }
79 printf ("%s %s ", der_get_class_name(class), der_get_type_name(type));
80 tagname = der_get_tag_name(tag);
81 if (class == ASN1_C_UNIV && tagname != NULL)
82 printf ("%s = ", tagname);
83 else
84 printf ("tag %d = ", tag);
85 ret = der_get_length (buf, len, &length, &sz);
86 if (ret)
87 errx (1, "der_get_tag: %s", error_message (ret));
88 if (sz > len)
89 errx (1, "unreasonable tag length (%u) > %u",
90 (unsigned)sz, (unsigned)len);
91 buf += sz;
92 len -= sz;
93 if (length == ASN1_INDEFINITE) {
94 if ((class == ASN1_C_UNIV && type == PRIM && tag == UT_OctetString) ||
95 (class == ASN1_C_CONTEXT && type == CONS) ||
96 (class == ASN1_C_UNIV && type == CONS && tag == UT_Sequence) ||
97 (class == ASN1_C_UNIV && type == CONS && tag == UT_Set)) {
98 printf("*INDEFINITE FORM*");
99 } else {
100 fflush(stdout);
101 errx(1, "indef form used on unsupported object");
102 }
103 end_tag = 1;
104 if (indefinite_form_loop > indefinite_form_loop_max)
105 errx(1, "indefinite form used recursively more then %lu "
106 "times, aborting", indefinite_form_loop_max);
107 indefinite_form_loop++;
108 length = len;
109 } else if (length > len) {
110 printf("\n");
111 fflush(stdout);
112 errx (1, "unreasonable inner length (%u) > %u",
113 (unsigned)length, (unsigned)len);
114 }
115 if (class == ASN1_C_CONTEXT || class == ASN1_C_APPL) {
116 printf ("%lu bytes [%u]", (unsigned long)length, tag);
117 if (type == CONS) {
118 printf("\n");
119 loop_length = loop (buf, length, indent + 2);
120 } else {
121 printf(" IMPLICIT content\n");
122 }
123 } else if (class == ASN1_C_UNIV) {
124 switch (tag) {
125 case UT_EndOfContent:
126 printf (" INDEFINITE length was %lu\n",
127 (unsigned long)(buf - start_buf));
128 break;
129 case UT_Set :
130 case UT_Sequence :
131 printf ("%lu bytes {\n", (unsigned long)length);
132 loop_length = loop (buf, length, indent + 2);
133 if (indent_flag) {
134 int i;
135 for (i = 0; i < indent; ++i)
136 printf (" ");
137 printf ("}\n");
138 } else
139 printf ("} indent = %d\n", indent / 2);
140 break;
141 case UT_Integer : {
142 int val;
143
144 if (length <= sizeof(val)) {
145 ret = der_get_integer (buf, length, &val, NULL);
146 if (ret)
147 errx (1, "der_get_integer: %s", error_message (ret));
148 printf ("integer %d\n", val);
149 } else {
150 heim_integer vali;
151 char *p;
152
153 ret = der_get_heim_integer(buf, length, &vali, NULL);
154 if (ret)
155 errx (1, "der_get_heim_integer: %s",
156 error_message (ret));
157 ret = der_print_hex_heim_integer(&vali, &p);
158 if (ret)
159 errx (1, "der_print_hex_heim_integer: %s",
160 error_message (ret));
161 printf ("BIG NUM integer: length %lu %s\n",
162 (unsigned long)length, p);
163 free(p);
164 }
165 break;
166 }
167 case UT_OctetString : {
168 heim_octet_string str;
169 size_t i;
170
171 ret = der_get_octet_string (buf, length, &str, NULL);
172 if (ret)
173 errx (1, "der_get_octet_string: %s", error_message (ret));
174 printf ("(length %lu), ", (unsigned long)length);
175
176 if (inner_flag) {
177 Der_class class;
178 Der_type type;
179 unsigned int tag;
180
181 ret = der_get_tag(str.data, str.length,
182 &class, &type, &tag, &sz);
183 if (ret || sz > str.length ||
184 type != CONS || tag != UT_Sequence)
185 goto just_an_octet_string;
186
187 printf("{\n");
188 loop (str.data, str.length, indent + 2);
189 for (i = 0; i < indent; ++i)
190 printf (" ");
191 printf ("}\n");
192
193 } else {
194 unsigned char *uc;
195
196 just_an_octet_string:
197 uc = (unsigned char *)str.data;
198 for (i = 0; i < min(16,length); ++i)
199 printf ("%02x", uc[i]);
200 printf ("\n");
201 }
202 free (str.data);
203 break;
204 }
205 case UT_IA5String :
206 case UT_PrintableString : {
207 heim_printable_string str;
208 unsigned char *s;
209 size_t n;
210
211 memset(&str, 0, sizeof(str));
212
213 ret = der_get_printable_string (buf, length, &str, NULL);
214 if (ret)
215 errx (1, "der_get_general_string: %s",
216 error_message (ret));
217 s = str.data;
218 printf("\"");
219 for (n = 0; n < str.length; n++) {
220 if (isprint((int)s[n]))
221 printf ("%c", s[n]);
222 else
223 printf ("#%02x", s[n]);
224 }
225 printf("\"\n");
226 der_free_printable_string(&str);
227 break;
228 }
229 case UT_GeneralizedTime :
230 case UT_GeneralString :
231 case UT_VisibleString :
232 case UT_UTF8String : {
233 heim_general_string str;
234
235 ret = der_get_general_string (buf, length, &str, NULL);
236 if (ret)
237 errx (1, "der_get_general_string: %s",
238 error_message (ret));
239 printf ("\"%s\"\n", str);
240 free (str);
241 break;
242 }
243 case UT_OID: {
244 heim_oid o;
245 char *p;
246
247 ret = der_get_oid(buf, length, &o, NULL);
248 if (ret)
249 errx (1, "der_get_oid: %s", error_message (ret));
250 ret = der_print_heim_oid(&o, '.', &p);
251 der_free_oid(&o);
252 if (ret)
253 errx (1, "der_print_heim_oid: %s", error_message (ret));
254 printf("%s\n", p);
255 free(p);
256
257 break;
258 }
259 case UT_Enumerated: {
260 int num;
261
262 ret = der_get_integer (buf, length, &num, NULL);
263 if (ret)
264 errx (1, "der_get_enum: %s", error_message (ret));
265
266 printf("%u\n", num);
267 break;
268 }
269 default :
270 printf ("%lu bytes\n", (unsigned long)length);
271 break;
272 }
273 }
274 if (end_tag) {
275 if (loop_length == 0)
276 errx(1, "zero length INDEFINITE data ? indent = %d\n",
277 indent / 2);
278 if (loop_length < length)
279 length = loop_length;
280 if (indefinite_form_loop == 0)
281 errx(1, "internal error in indefinite form loop detection");
282 indefinite_form_loop--;
283 } else if (loop_length)
284 errx(1, "internal error for INDEFINITE form");
285 buf += length;
286 len -= length;
287 }
288 return 0;
289}
290
291static int
292doit (const char *filename)
293{
294 int fd = open (filename, O_RDONLY);
295 struct stat sb;
296 unsigned char *buf;
297 size_t len;
298 int ret;
299
300 if(fd < 0)
301 err (1, "opening %s for read", filename);
302 if (fstat (fd, &sb) < 0)
303 err (1, "stat %s", filename);
304 len = sb.st_size;
305 buf = emalloc (len);
306 if (read (fd, buf, len) != len)
307 errx (1, "read failed");
308 close (fd);
309 ret = loop (buf, len, 0);
310 free (buf);
311 return ret;
312}
313
314
315static int version_flag;
316static int help_flag;
317struct getargs args[] = {
318 { "indent", 0, arg_negative_flag, &indent_flag },
319 { "inner", 0, arg_flag, &inner_flag, "try to parse inner structures of OCTET STRING" },
320 { "version", 0, arg_flag, &version_flag },
321 { "help", 0, arg_flag, &help_flag }
322};
323int num_args = sizeof(args) / sizeof(args[0]);
324
325static void
326usage(int code)
327{
328 arg_printusage(args, num_args, NULL, "dump-file");
329 exit(code);
330}
331
332int
333main(int argc, char **argv)
334{
335 int optidx = 0;
336
337 setprogname (argv[0]);
338 initialize_asn1_error_table ();
339 if(getarg(args, num_args, argc, argv, &optidx))
340 usage(1);
341 if(help_flag)
342 usage(0);
343 if(version_flag) {
344 print_version(NULL);
345 exit(0);
346 }
347 argv += optidx;
348 argc -= optidx;
349 if (argc != 1)
350 usage (1);
351 return doit (argv[0]);
352}
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