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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, 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 p = ASN1_tag2str(tag);
92
93 if (p2 != NULL)
94 {
95 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
96 }
97 else
98 {
99 if (BIO_printf(bp,fmt,p) <= 0) goto err;
100 }
101 return(1);
102err:
103 return(0);
104 }
105
106int ASN1_parse(BIO *bp, unsigned char *pp, long len, int indent)
107 {
108 return(asn1_parse2(bp,&pp,len,0,0,indent,0));
109 }
110
111int ASN1_parse_dump(BIO *bp, unsigned char *pp, long len, int indent, int dump)
112 {
113 return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
114 }
115
116static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset,
117 int depth, int indent, int dump)
118 {
119 unsigned char *p,*ep,*tot,*op,*opp;
120 long len;
121 int tag,xclass,ret=0;
122 int nl,hl,j,r;
123 ASN1_OBJECT *o=NULL;
124 ASN1_OCTET_STRING *os=NULL;
125 /* ASN1_BMPSTRING *bmp=NULL;*/
126 int dump_indent;
127
128#if 0
129 dump_indent = indent;
130#else
131 dump_indent = 6; /* Because we know BIO_dump_indent() */
132#endif
133 p= *pp;
134 tot=p+length;
135 op=p-1;
136 while ((p < tot) && (op < p))
137 {
138 op=p;
139 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
140#ifdef LINT
141 j=j;
142#endif
143 if (j & 0x80)
144 {
145 if (BIO_write(bp,"Error in encoding\n",18) <= 0)
146 goto end;
147 ret=0;
148 goto end;
149 }
150 hl=(p-op);
151 length-=hl;
152 /* if j == 0x21 it is a constructed indefinite length object */
153 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
154 <= 0) goto end;
155
156 if (j != (V_ASN1_CONSTRUCTED | 1))
157 {
158 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
159 depth,(long)hl,len) <= 0)
160 goto end;
161 }
162 else
163 {
164 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
165 depth,(long)hl) <= 0)
166 goto end;
167 }
168 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
169 goto end;
170 if (j & V_ASN1_CONSTRUCTED)
171 {
172 ep=p+len;
173 if (BIO_write(bp,"\n",1) <= 0) goto end;
174 if (len > length)
175 {
176 BIO_printf(bp,
177 "length is greater than %ld\n",length);
178 ret=0;
179 goto end;
180 }
181 if ((j == 0x21) && (len == 0))
182 {
183 for (;;)
184 {
185 r=asn1_parse2(bp,&p,(long)(tot-p),
186 offset+(p - *pp),depth+1,
187 indent,dump);
188 if (r == 0) { ret=0; goto end; }
189 if ((r == 2) || (p >= tot)) break;
190 }
191 }
192 else
193 while (p < ep)
194 {
195 r=asn1_parse2(bp,&p,(long)len,
196 offset+(p - *pp),depth+1,
197 indent,dump);
198 if (r == 0) { ret=0; goto end; }
199 }
200 }
201 else if (xclass != 0)
202 {
203 p+=len;
204 if (BIO_write(bp,"\n",1) <= 0) goto end;
205 }
206 else
207 {
208 nl=0;
209 if ( (tag == V_ASN1_PRINTABLESTRING) ||
210 (tag == V_ASN1_T61STRING) ||
211 (tag == V_ASN1_IA5STRING) ||
212 (tag == V_ASN1_VISIBLESTRING) ||
213 (tag == V_ASN1_UTCTIME) ||
214 (tag == V_ASN1_GENERALIZEDTIME))
215 {
216 if (BIO_write(bp,":",1) <= 0) goto end;
217 if ((len > 0) &&
218 BIO_write(bp,(char *)p,(int)len)
219 != (int)len)
220 goto end;
221 }
222 else if (tag == V_ASN1_OBJECT)
223 {
224 opp=op;
225 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
226 {
227 if (BIO_write(bp,":",1) <= 0) goto end;
228 i2a_ASN1_OBJECT(bp,o);
229 }
230 else
231 {
232 if (BIO_write(bp,":BAD OBJECT",11) <= 0)
233 goto end;
234 }
235 }
236 else if (tag == V_ASN1_BOOLEAN)
237 {
238 int ii;
239
240 opp=op;
241 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
242 if (ii < 0)
243 {
244 if (BIO_write(bp,"Bad boolean\n",12))
245 goto end;
246 }
247 BIO_printf(bp,":%d",ii);
248 }
249 else if (tag == V_ASN1_BMPSTRING)
250 {
251 /* do the BMP thang */
252 }
253 else if (tag == V_ASN1_OCTET_STRING)
254 {
255 int i,printable=1;
256
257 opp=op;
258 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
259 if (os != NULL)
260 {
261 opp=os->data;
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 && (os->length > 0))
275 {
276 if (BIO_write(bp,":",1) <= 0)
277 goto end;
278 if (BIO_write(bp,(char *)opp,
279 os->length) <= 0)
280 goto end;
281 }
282 if (!printable && (os->length > 0)
283 && dump)
284 {
285 if (!nl)
286 {
287 if (BIO_write(bp,"\n",1) <= 0)
288 goto end;
289 }
290 if (BIO_dump_indent(bp,(char *)opp,
291 ((dump == -1 || dump > os->length)?os->length:dump),
292 dump_indent) <= 0)
293 goto end;
294 nl=1;
295 }
296 M_ASN1_OCTET_STRING_free(os);
297 os=NULL;
298 }
299 }
300 else if (tag == V_ASN1_INTEGER)
301 {
302 ASN1_INTEGER *bs;
303 int i;
304
305 opp=op;
306 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
307 if (bs != NULL)
308 {
309 if (BIO_write(bp,":",1) <= 0) goto end;
310 if (bs->type == V_ASN1_NEG_INTEGER)
311 if (BIO_write(bp,"-",1) <= 0)
312 goto end;
313 for (i=0; i<bs->length; i++)
314 {
315 if (BIO_printf(bp,"%02X",
316 bs->data[i]) <= 0)
317 goto end;
318 }
319 if (bs->length == 0)
320 {
321 if (BIO_write(bp,"00",2) <= 0)
322 goto end;
323 }
324 }
325 else
326 {
327 if (BIO_write(bp,"BAD INTEGER",11) <= 0)
328 goto end;
329 }
330 M_ASN1_INTEGER_free(bs);
331 }
332 else if (tag == V_ASN1_ENUMERATED)
333 {
334 ASN1_ENUMERATED *bs;
335 int i;
336
337 opp=op;
338 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
339 if (bs != NULL)
340 {
341 if (BIO_write(bp,":",1) <= 0) goto end;
342 if (bs->type == V_ASN1_NEG_ENUMERATED)
343 if (BIO_write(bp,"-",1) <= 0)
344 goto end;
345 for (i=0; i<bs->length; i++)
346 {
347 if (BIO_printf(bp,"%02X",
348 bs->data[i]) <= 0)
349 goto end;
350 }
351 if (bs->length == 0)
352 {
353 if (BIO_write(bp,"00",2) <= 0)
354 goto end;
355 }
356 }
357 else
358 {
359 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
360 goto end;
361 }
362 M_ASN1_ENUMERATED_free(bs);
363 }
364 else if (len > 0 && dump)
365 {
366 if (!nl)
367 {
368 if (BIO_write(bp,"\n",1) <= 0)
369 goto end;
370 }
371 if (BIO_dump_indent(bp,(char *)p,
372 ((dump == -1 || dump > len)?len:dump),
373 dump_indent) <= 0)
374 goto end;
375 nl=1;
376 }
377
378 if (!nl)
379 {
380 if (BIO_write(bp,"\n",1) <= 0) goto end;
381 }
382 p+=len;
383 if ((tag == V_ASN1_EOC) && (xclass == 0))
384 {
385 ret=2; /* End of sequence */
386 goto end;
387 }
388 }
389 length-=len;
390 }
391 ret=1;
392end:
393 if (o != NULL) ASN1_OBJECT_free(o);
394 if (os != NULL) M_ASN1_OCTET_STRING_free(os);
395 *pp=p;
396 return(ret);
397 }
398
399const char *ASN1_tag2str(int tag)
400{
401 const static char *tag2str[] = {
402 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
403 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
404 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
405 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
406 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
407 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
408 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
409 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
410 };
411
412 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
413 tag &= ~0x100;
414
415 if(tag < 0 || tag > 30) return "(unknown)";
416 return tag2str[tag];
417}
418
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