1 /* crypto/asn1/asn1_par.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 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/buffer.h>
62 #include <openssl/objects.h>
63 #include <openssl/asn1.h>
64
65 static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
66 int indent);
67 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
68 int offset, int depth, int indent, int dump);
69 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
70 int indent)
71 {
72 static const char fmt[]="%-18s";
73 char str[128];
74 const char *p;
75
76 if (constructed & V_ASN1_CONSTRUCTED)
77 p="cons: ";
78 else
79 p="prim: ";
80 if (BIO_write(bp,p,6) < 6) goto err;
81 BIO_indent(bp,indent,128);
82
83 p=str;
84 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
85 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag);
86 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
87 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag);
88 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
89 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag);
90 else if (tag > 30)
91 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag);
92 else
93 p = ASN1_tag2str(tag);
94
95 if (BIO_printf(bp,fmt,p) <= 0)
96 goto err;
97 return(1);
98 err:
99 return(0);
100 }
101
102 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
103 {
104 return(asn1_parse2(bp,&pp,len,0,0,indent,0));
105 }
106
107 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
108 {
109 return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
110 }
111
112 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
113 int depth, int indent, int dump)
114 {
115 const unsigned char *p,*ep,*tot,*op,*opp;
116 long len;
117 int tag,xclass,ret=0;
118 int nl,hl,j,r;
119 ASN1_OBJECT *o=NULL;
120 ASN1_OCTET_STRING *os=NULL;
121 /* ASN1_BMPSTRING *bmp=NULL;*/
122 int dump_indent;
123
124 #if 0
125 dump_indent = indent;
126 #else
127 dump_indent = 6; /* Because we know BIO_dump_indent() */
128 #endif
129 p= *pp;
130 tot=p+length;
131 op=p-1;
132 while ((p < tot) && (op < p))
133 {
134 op=p;
135 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
136 #ifdef LINT
137 j=j;
138 #endif
139 if (j & 0x80)
140 {
141 if (BIO_write(bp,"Error in encoding\n",18) <= 0)
142 goto end;
143 ret=0;
144 goto end;
145 }
146 hl=(p-op);
147 length-=hl;
148 /* if j == 0x21 it is a constructed indefinite length object */
149 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
150 <= 0) goto end;
151
152 if (j != (V_ASN1_CONSTRUCTED | 1))
153 {
154 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
155 depth,(long)hl,len) <= 0)
156 goto end;
157 }
158 else
159 {
160 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
161 depth,(long)hl) <= 0)
162 goto end;
163 }
164 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
165 goto end;
166 if (j & V_ASN1_CONSTRUCTED)
167 {
168 ep=p+len;
169 if (BIO_write(bp,"\n",1) <= 0) goto end;
170 if (len > length)
171 {
172 BIO_printf(bp,
173 "length is greater than %ld\n",length);
174 ret=0;
175 goto end;
176 }
177 if ((j == 0x21) && (len == 0))
178 {
179 for (;;)
180 {
181 r=asn1_parse2(bp,&p,(long)(tot-p),
182 offset+(p - *pp),depth+1,
183 indent,dump);
184 if (r == 0) { ret=0; goto end; }
185 if ((r == 2) || (p >= tot)) break;
186 }
187 }
188 else
189 while (p < ep)
190 {
191 r=asn1_parse2(bp,&p,(long)len,
192 offset+(p - *pp),depth+1,
193 indent,dump);
194 if (r == 0) { ret=0; goto end; }
195 }
196 }
197 else if (xclass != 0)
198 {
199 p+=len;
200 if (BIO_write(bp,"\n",1) <= 0) goto end;
201 }
202 else
203 {
204 nl=0;
205 if ( (tag == V_ASN1_PRINTABLESTRING) ||
206 (tag == V_ASN1_T61STRING) ||
207 (tag == V_ASN1_IA5STRING) ||
208 (tag == V_ASN1_VISIBLESTRING) ||
209 (tag == V_ASN1_NUMERICSTRING) ||
210 (tag == V_ASN1_UTF8STRING) ||
211 (tag == V_ASN1_UTCTIME) ||
212 (tag == V_ASN1_GENERALIZEDTIME))
213 {
214 if (BIO_write(bp,":",1) <= 0) goto end;
215 if ((len > 0) &&
216 BIO_write(bp,(const char *)p,(int)len)
217 != (int)len)
218 goto end;
219 }
220 else if (tag == V_ASN1_OBJECT)
221 {
222 opp=op;
223 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
224 {
225 if (BIO_write(bp,":",1) <= 0) goto end;
226 i2a_ASN1_OBJECT(bp,o);
227 }
228 else
229 {
230 if (BIO_write(bp,":BAD OBJECT",11) <= 0)
231 goto end;
232 }
233 }
234 else if (tag == V_ASN1_BOOLEAN)
235 {
236 int ii;
237
238 opp=op;
239 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
240 if (ii < 0)
241 {
242 if (BIO_write(bp,"Bad boolean\n",12) <= 0)
243 goto end;
244 }
245 BIO_printf(bp,":%d",ii);
246 }
247 else if (tag == V_ASN1_BMPSTRING)
248 {
249 /* do the BMP thang */
250 }
251 else if (tag == V_ASN1_OCTET_STRING)
252 {
253 int i,printable=1;
254
255 opp=op;
256 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
257 if (os != NULL && os->length > 0)
258 {
259 opp = os->data;
260 /* testing whether the octet string is
261 * printable */
262 for (i=0; i<os->length; i++)
263 {
264 if (( (opp[i] < ' ') &&
265 (opp[i] != '\n') &&
266 (opp[i] != '\r') &&
267 (opp[i] != '\t')) ||
268 (opp[i] > '~'))
269 {
270 printable=0;
271 break;
272 }
273 }
274 if (printable)
275 /* printable string */
276 {
277 if (BIO_write(bp,":",1) <= 0)
278 goto end;
279 if (BIO_write(bp,(const char *)opp,
280 os->length) <= 0)
281 goto end;
282 }
283 else if (!dump)
284 /* not printable => print octet string
285 * as hex dump */
286 {
287 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
288 goto end;
289 for (i=0; i<os->length; i++)
290 {
291 if (BIO_printf(bp,"%02X"
292 , opp[i]) <= 0)
293 goto end;
294 }
295 }
296 else
297 /* print the normal dump */
298 {
299 if (!nl)
300 {
301 if (BIO_write(bp,"\n",1) <= 0)
302 goto end;
303 }
304 if (BIO_dump_indent(bp,
305 (const char *)opp,
306 ((dump == -1 || dump >
307 os->length)?os->length:dump),
308 dump_indent) <= 0)
309 goto end;
310 nl=1;
311 }
312 }
313 if (os != NULL)
314 {
315 M_ASN1_OCTET_STRING_free(os);
316 os=NULL;
317 }
318 }
319 else if (tag == V_ASN1_INTEGER)
320 {
321 ASN1_INTEGER *bs;
322 int i;
323
324 opp=op;
325 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
326 if (bs != NULL)
327 {
328 if (BIO_write(bp,":",1) <= 0) goto end;
329 if (bs->type == V_ASN1_NEG_INTEGER)
330 if (BIO_write(bp,"-",1) <= 0)
331 goto end;
332 for (i=0; i<bs->length; i++)
333 {
334 if (BIO_printf(bp,"%02X",
335 bs->data[i]) <= 0)
336 goto end;
337 }
338 if (bs->length == 0)
339 {
340 if (BIO_write(bp,"00",2) <= 0)
341 goto end;
342 }
343 }
344 else
345 {
346 if (BIO_write(bp,"BAD INTEGER",11) <= 0)
347 goto end;
348 }
349 M_ASN1_INTEGER_free(bs);
350 }
351 else if (tag == V_ASN1_ENUMERATED)
352 {
353 ASN1_ENUMERATED *bs;
354 int i;
355
356 opp=op;
357 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
358 if (bs != NULL)
359 {
360 if (BIO_write(bp,":",1) <= 0) goto end;
361 if (bs->type == V_ASN1_NEG_ENUMERATED)
362 if (BIO_write(bp,"-",1) <= 0)
363 goto end;
364 for (i=0; i<bs->length; i++)
365 {
366 if (BIO_printf(bp,"%02X",
367 bs->data[i]) <= 0)
368 goto end;
369 }
370 if (bs->length == 0)
371 {
372 if (BIO_write(bp,"00",2) <= 0)
373 goto end;
374 }
375 }
376 else
377 {
378 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
379 goto end;
380 }
381 M_ASN1_ENUMERATED_free(bs);
382 }
383 else if (len > 0 && dump)
384 {
385 if (!nl)
386 {
387 if (BIO_write(bp,"\n",1) <= 0)
388 goto end;
389 }
390 if (BIO_dump_indent(bp,(const char *)p,
391 ((dump == -1 || dump > len)?len:dump),
392 dump_indent) <= 0)
393 goto end;
394 nl=1;
395 }
396
397 if (!nl)
398 {
399 if (BIO_write(bp,"\n",1) <= 0) goto end;
400 }
401 p+=len;
402 if ((tag == V_ASN1_EOC) && (xclass == 0))
403 {
404 ret=2; /* End of sequence */
405 goto end;
406 }
407 }
408 length-=len;
409 }
410 ret=1;
411 end:
412 if (o != NULL) ASN1_OBJECT_free(o);
413 if (os != NULL) M_ASN1_OCTET_STRING_free(os);
414 *pp=p;
415 return(ret);
416 }
417
418 const char *ASN1_tag2str(int tag)
419 {
420 static const char * const tag2str[] = {
421 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
422 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
423 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
424 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
425 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
426 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
427 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
428 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
429 };
430
431 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
432 tag &= ~0x100;
433
434 if(tag < 0 || tag > 30) return "(unknown)";
435 return tag2str[tag];
436 }