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