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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
65static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
66 int indent);
67static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
68 int offset, int depth, int indent, int dump);
69static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
70 int indent)
71 {
72 static const char fmt[]="%-18s";
73 static const char fmt2[]="%2d %-15s";
74 char str[128];
75 const char *p,*p2=NULL;
76
77 if (constructed & V_ASN1_CONSTRUCTED)
78 p="cons: ";
79 else
80 p="prim: ";
81 if (BIO_write(bp,p,6) < 6) goto err;
82 BIO_indent(bp,indent,128);
83
84 p=str;
85 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
86 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag);
87 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
88 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag);
89 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
90 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag);
91 else if (tag > 30)
92 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag);
93 else
94 p = ASN1_tag2str(tag);
95
96 if (p2 != NULL)
97 {
98 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
99 }
100 else
101 {
102 if (BIO_printf(bp,fmt,p) <= 0) goto err;
103 }
104 return(1);
105err:
106 return(0);
107 }
108
109int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
110 {
111 return(asn1_parse2(bp,&pp,len,0,0,indent,0));
112 }
113
114int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
115 {
116 return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
117 }
118
119static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
120 int depth, int indent, int dump)
121 {
122 const unsigned char *p,*ep,*tot,*op,*opp;
123 long len;
124 int tag,xclass,ret=0;
125 int nl,hl,j,r;
126 ASN1_OBJECT *o=NULL;
127 ASN1_OCTET_STRING *os=NULL;
128 /* ASN1_BMPSTRING *bmp=NULL;*/
129 int dump_indent;
130
131#if 0
132 dump_indent = indent;
133#else
134 dump_indent = 6; /* Because we know BIO_dump_indent() */
135#endif
136 p= *pp;
137 tot=p+length;
138 op=p-1;
139 while ((p < tot) && (op < p))
140 {
141 op=p;
142 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
143#ifdef LINT
144 j=j;
145#endif
146 if (j & 0x80)
147 {
148 if (BIO_write(bp,"Error in encoding\n",18) <= 0)
149 goto end;
150 ret=0;
151 goto end;
152 }
153 hl=(p-op);
154 length-=hl;
155 /* if j == 0x21 it is a constructed indefinite length object */
156 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
157 <= 0) goto end;
158
159 if (j != (V_ASN1_CONSTRUCTED | 1))
160 {
161 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
162 depth,(long)hl,len) <= 0)
163 goto end;
164 }
165 else
166 {
167 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
168 depth,(long)hl) <= 0)
169 goto end;
170 }
171 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
172 goto end;
173 if (j & V_ASN1_CONSTRUCTED)
174 {
175 ep=p+len;
176 if (BIO_write(bp,"\n",1) <= 0) goto end;
177 if (len > length)
178 {
179 BIO_printf(bp,
180 "length is greater than %ld\n",length);
181 ret=0;
182 goto end;
183 }
184 if ((j == 0x21) && (len == 0))
185 {
186 for (;;)
187 {
188 r=asn1_parse2(bp,&p,(long)(tot-p),
189 offset+(p - *pp),depth+1,
190 indent,dump);
191 if (r == 0) { ret=0; goto end; }
192 if ((r == 2) || (p >= tot)) break;
193 }
194 }
195 else
196 while (p < ep)
197 {
198 r=asn1_parse2(bp,&p,(long)len,
199 offset+(p - *pp),depth+1,
200 indent,dump);
201 if (r == 0) { ret=0; goto end; }
202 }
203 }
204 else if (xclass != 0)
205 {
206 p+=len;
207 if (BIO_write(bp,"\n",1) <= 0) goto end;
208 }
209 else
210 {
211 nl=0;
212 if ( (tag == V_ASN1_PRINTABLESTRING) ||
213 (tag == V_ASN1_T61STRING) ||
214 (tag == V_ASN1_IA5STRING) ||
215 (tag == V_ASN1_VISIBLESTRING) ||
216 (tag == V_ASN1_UTCTIME) ||
217 (tag == V_ASN1_GENERALIZEDTIME))
218 {
219 if (BIO_write(bp,":",1) <= 0) goto end;
220 if ((len > 0) &&
221 BIO_write(bp,(const char *)p,(int)len)
222 != (int)len)
223 goto end;
224 }
225 else if (tag == V_ASN1_OBJECT)
226 {
227 opp=op;
228 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
229 {
230 if (BIO_write(bp,":",1) <= 0) goto end;
231 i2a_ASN1_OBJECT(bp,o);
232 }
233 else
234 {
235 if (BIO_write(bp,":BAD OBJECT",11) <= 0)
236 goto end;
237 }
238 }
239 else if (tag == V_ASN1_BOOLEAN)
240 {
241 int ii;
242
243 opp=op;
244 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
245 if (ii < 0)
246 {
247 if (BIO_write(bp,"Bad boolean\n",12))
248 goto end;
249 }
250 BIO_printf(bp,":%d",ii);
251 }
252 else if (tag == V_ASN1_BMPSTRING)
253 {
254 /* do the BMP thang */
255 }
256 else if (tag == V_ASN1_OCTET_STRING)
257 {
258 int i,printable=1;
259
260 opp=op;
261 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
262 if (os != NULL && os->length > 0)
263 {
264 opp = os->data;
265 /* testing whether the octet string is
266 * printable */
267 for (i=0; i<os->length; i++)
268 {
269 if (( (opp[i] < ' ') &&
270 (opp[i] != '\n') &&
271 (opp[i] != '\r') &&
272 (opp[i] != '\t')) ||
273 (opp[i] > '~'))
274 {
275 printable=0;
276 break;
277 }
278 }
279 if (printable)
280 /* printable string */
281 {
282 if (BIO_write(bp,":",1) <= 0)
283 goto end;
284 if (BIO_write(bp,(const char *)opp,
285 os->length) <= 0)
286 goto end;
287 }
288 else if (!dump)
289 /* not printable => print octet string
290 * as hex dump */
291 {
292 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
293 goto end;
294 for (i=0; i<os->length; i++)
295 {
296 if (BIO_printf(bp,"%02X"
297 , opp[i]) <= 0)
298 goto end;
299 }
300 }
301 else
302 /* print the normal dump */
303 {
304 if (!nl)
305 {
306 if (BIO_write(bp,"\n",1) <= 0)
307 goto end;
308 }
309 if (BIO_dump_indent(bp,
310 (const char *)opp,
311 ((dump == -1 || dump >
312 os->length)?os->length:dump),
313 dump_indent) <= 0)
314 goto end;
315 nl=1;
316 }
317 }
318 if (os != NULL)
319 {
320 M_ASN1_OCTET_STRING_free(os);
321 os=NULL;
322 }
323 }
324 else if (tag == V_ASN1_INTEGER)
325 {
326 ASN1_INTEGER *bs;
327 int i;
328
329 opp=op;
330 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
331 if (bs != NULL)
332 {
333 if (BIO_write(bp,":",1) <= 0) goto end;
334 if (bs->type == V_ASN1_NEG_INTEGER)
335 if (BIO_write(bp,"-",1) <= 0)
336 goto end;
337 for (i=0; i<bs->length; i++)
338 {
339 if (BIO_printf(bp,"%02X",
340 bs->data[i]) <= 0)
341 goto end;
342 }
343 if (bs->length == 0)
344 {
345 if (BIO_write(bp,"00",2) <= 0)
346 goto end;
347 }
348 }
349 else
350 {
351 if (BIO_write(bp,"BAD INTEGER",11) <= 0)
352 goto end;
353 }
354 M_ASN1_INTEGER_free(bs);
355 }
356 else if (tag == V_ASN1_ENUMERATED)
357 {
358 ASN1_ENUMERATED *bs;
359 int i;
360
361 opp=op;
362 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
363 if (bs != NULL)
364 {
365 if (BIO_write(bp,":",1) <= 0) goto end;
366 if (bs->type == V_ASN1_NEG_ENUMERATED)
367 if (BIO_write(bp,"-",1) <= 0)
368 goto end;
369 for (i=0; i<bs->length; i++)
370 {
371 if (BIO_printf(bp,"%02X",
372 bs->data[i]) <= 0)
373 goto end;
374 }
375 if (bs->length == 0)
376 {
377 if (BIO_write(bp,"00",2) <= 0)
378 goto end;
379 }
380 }
381 else
382 {
383 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
384 goto end;
385 }
386 M_ASN1_ENUMERATED_free(bs);
387 }
388 else if (len > 0 && dump)
389 {
390 if (!nl)
391 {
392 if (BIO_write(bp,"\n",1) <= 0)
393 goto end;
394 }
395 if (BIO_dump_indent(bp,(const char *)p,
396 ((dump == -1 || dump > len)?len:dump),
397 dump_indent) <= 0)
398 goto end;
399 nl=1;
400 }
401
402 if (!nl)
403 {
404 if (BIO_write(bp,"\n",1) <= 0) goto end;
405 }
406 p+=len;
407 if ((tag == V_ASN1_EOC) && (xclass == 0))
408 {
409 ret=2; /* End of sequence */
410 goto end;
411 }
412 }
413 length-=len;
414 }
415 ret=1;
416end:
417 if (o != NULL) ASN1_OBJECT_free(o);
418 if (os != NULL) M_ASN1_OCTET_STRING_free(os);
419 *pp=p;
420 return(ret);
421 }
422
423const char *ASN1_tag2str(int tag)
424{
425 static const char *tag2str[] = {
426 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
427 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
428 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
429 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
430 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
431 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
432 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
433 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
434 };
435
436 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
437 tag &= ~0x100;
438
439 if(tag < 0 || tag > 30) return "(unknown)";
440 return tag2str[tag];
441}
442
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