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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 "buffer.h"
62#include "objects.h"
63#include "x509.h"
64
65#ifndef NOPROTO
66static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
67 int indent);
68static int asn1_parse2(BIO *bp, unsigned char **pp, long length,
69 int offset, int depth, int indent);
70#else
71static int asn1_print_info();
72static int asn1_parse2();
73#endif
74
75static int asn1_print_info(bp, tag, xclass, constructed,indent)
76BIO *bp;
77int tag;
78int xclass;
79int constructed;
80int indent;
81 {
82 static char *fmt="%-18s";
83 static char *fmt2="%2d %-15s";
84 char *p,str[128],*p2=NULL;
85
86 if (constructed & V_ASN1_CONSTRUCTED)
87 p="cons: ";
88 else
89 p="prim: ";
90 if (BIO_write(bp,p,6) < 6) goto err;
91 if (indent)
92 {
93 if (indent > 128) indent=128;
94 memset(str,' ',indent);
95 if (BIO_write(bp,str,indent) < indent) goto err;
96 }
97
98 p=str;
99 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
100 sprintf(str,"priv [ %d ] ",tag);
101 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
102 sprintf(str,"cont [ %d ]",tag);
103 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
104 sprintf(str,"appl [ %d ]",tag);
105 else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */)
106 p="EOC";
107 else if (tag == V_ASN1_BOOLEAN)
108 p="BOOLEAN";
109 else if (tag == V_ASN1_INTEGER)
110 p="INTEGER";
111 else if (tag == V_ASN1_BIT_STRING)
112 p="BIT STRING";
113 else if (tag == V_ASN1_OCTET_STRING)
114 p="OCTET STRING";
115 else if (tag == V_ASN1_NULL)
116 p="NULL";
117 else if (tag == V_ASN1_OBJECT)
118 p="OBJECT";
119 else if (tag == V_ASN1_SEQUENCE)
120 p="SEQUENCE";
121 else if (tag == V_ASN1_SET)
122 p="SET";
123 else if (tag == V_ASN1_PRINTABLESTRING)
124 p="PRINTABLESTRING";
125 else if (tag == V_ASN1_T61STRING)
126 p="T61STRING";
127 else if (tag == V_ASN1_IA5STRING)
128 p="IA5STRING";
129 else if (tag == V_ASN1_UTCTIME)
130 p="UTCTIME";
131
132 /* extras */
133 else if (tag == V_ASN1_NUMERICSTRING)
134 p="NUMERICSTRING";
135 else if (tag == V_ASN1_VIDEOTEXSTRING)
136 p="VIDEOTEXSTRING";
137 else if (tag == V_ASN1_GENERALIZEDTIME)
138 p="GENERALIZEDTIME";
139 else if (tag == V_ASN1_GRAPHICSTRING)
140 p="GRAPHICSTRING";
141 else if (tag == V_ASN1_ISO64STRING)
142 p="ISO64STRING";
143 else if (tag == V_ASN1_GENERALSTRING)
144 p="GENERALSTRING";
145 else if (tag == V_ASN1_UNIVERSALSTRING)
146 p="UNIVERSALSTRING";
147 else if (tag == V_ASN1_BMPSTRING)
148 p="BMPSTRING";
149 else
150 p2="(unknown)";
151
152 if (p2 != NULL)
153 {
154 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
155 }
156 else
157 {
158 if (BIO_printf(bp,fmt,p) <= 0) goto err;
159 }
160 return(1);
161err:
162 return(0);
163 }
164
165int ASN1_parse(bp, pp, len, indent)
166BIO *bp;
167unsigned char *pp;
168long len;
169int indent;
170 {
171 return(asn1_parse2(bp,&pp,len,0,0,indent));
172 }
173
174static int asn1_parse2(bp, pp, length, offset, depth, indent)
175BIO *bp;
176unsigned char **pp;
177long length;
178int offset;
179int depth;
180int indent;
181 {
182 unsigned char *p,*ep,*tot,*op,*opp;
183 long len;
184 int tag,xclass,ret=0;
185 int nl,hl,j,r;
186 ASN1_OBJECT *o=NULL;
187 ASN1_OCTET_STRING *os=NULL;
188 /* ASN1_BMPSTRING *bmp=NULL;*/
189
190 p= *pp;
191 tot=p+length;
192 op=p-1;
193 while ((p < tot) && (op < p))
194 {
195 op=p;
196 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
197#ifdef LINT
198 j=j;
199#endif
200 if (j & 0x80)
201 {
202 if (BIO_write(bp,"Error in encoding\n",18) <= 0)
203 goto end;
204 ret=0;
205 goto end;
206 }
207 hl=(p-op);
208 length-=hl;
209 /* if j == 0x21 it is a constructed indefinite length object */
210 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
211 <= 0) goto end;
212
213 if (j != (V_ASN1_CONSTRUCTED | 1))
214 {
215 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
216 depth,(long)hl,len) <= 0)
217 goto end;
218 }
219 else
220 {
221 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
222 depth,(long)hl) <= 0)
223 goto end;
224 }
225 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
226 goto end;
227 if (j & V_ASN1_CONSTRUCTED)
228 {
229 ep=p+len;
230 if (BIO_write(bp,"\n",1) <= 0) goto end;
231 if (len > length)
232 {
233 BIO_printf(bp,
234 "length is greater than %ld\n",length);
235 ret=0;
236 goto end;
237 }
238 if ((j == 0x21) && (len == 0))
239 {
240 for (;;)
241 {
242 r=asn1_parse2(bp,&p,(long)(tot-p),
243 offset+(p - *pp),depth+1,
244 indent);
245 if (r == 0) { ret=0; goto end; }
246 if ((r == 2) || (p >= tot)) break;
247 }
248 }
249 else
250 while (p < ep)
251 {
252 r=asn1_parse2(bp,&p,(long)len,
253 offset+(p - *pp),depth+1,
254 indent);
255 if (r == 0) { ret=0; goto end; }
256 }
257 }
258 else if (xclass != 0)
259 {
260 p+=len;
261 if (BIO_write(bp,"\n",1) <= 0) goto end;
262 }
263 else
264 {
265 nl=0;
266 if ( (tag == V_ASN1_PRINTABLESTRING) ||
267 (tag == V_ASN1_T61STRING) ||
268 (tag == V_ASN1_IA5STRING) ||
269 (tag == V_ASN1_UTCTIME))
270 {
271 if (BIO_write(bp,":",1) <= 0) goto end;
272 if ((len > 0) &&
273 BIO_write(bp,(char *)p,(int)len)
274 != (int)len)
275 goto end;
276 }
277 else if (tag == V_ASN1_OBJECT)
278 {
279 opp=op;
280 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
281 {
282 if (BIO_write(bp,":",1) <= 0) goto end;
283 i2a_ASN1_OBJECT(bp,o);
284 }
285 else
286 {
287 if (BIO_write(bp,":BAD OBJECT",11) <= 0)
288 goto end;
289 }
290 }
291 else if (tag == V_ASN1_BOOLEAN)
292 {
293 int ii;
294
295 opp=op;
296 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
297 if (ii < 0)
298 {
299 if (BIO_write(bp,"Bad boolean\n",12))
300 goto end;
301 }
302 BIO_printf(bp,":%d",ii);
303 }
304 else if (tag == V_ASN1_BMPSTRING)
305 {
306 /* do the BMP thang */
307 }
308 else if (tag == V_ASN1_OCTET_STRING)
309 {
310 int i,printable=1;
311
312 opp=op;
313 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
314 if (os != NULL)
315 {
316 opp=os->data;
317 for (i=0; i<os->length; i++)
318 {
319 if (( (opp[i] < ' ') &&
320 (opp[i] != '\n') &&
321 (opp[i] != '\r') &&
322 (opp[i] != '\t')) ||
323 (opp[i] > '~'))
324 {
325 printable=0;
326 break;
327 }
328 }
329 if (printable && (os->length > 0))
330 {
331 if (BIO_write(bp,":",1) <= 0)
332 goto end;
333 if (BIO_write(bp,(char *)opp,
334 os->length) <= 0)
335 goto end;
336 }
337 ASN1_OCTET_STRING_free(os);
338 os=NULL;
339 }
340 }
341 else if (tag == V_ASN1_INTEGER)
342 {
343 ASN1_INTEGER *bs;
344 int i;
345
346 opp=op;
347 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
348 if (bs != NULL)
349 {
350 if (BIO_write(bp,":",1) <= 0) goto end;
351 if (bs->type == V_ASN1_NEG_INTEGER)
352 if (BIO_write(bp,"-",1) <= 0)
353 goto end;
354 for (i=0; i<bs->length; i++)
355 {
356 if (BIO_printf(bp,"%02X",
357 bs->data[i]) <= 0)
358 goto end;
359 }
360 if (bs->length == 0)
361 {
362 if (BIO_write(bp,"00",2) <= 0)
363 goto end;
364 }
365 }
366 else
367 {
368 if (BIO_write(bp,"BAD INTEGER",11) <= 0)
369 goto end;
370 }
371 ASN1_INTEGER_free(bs);
372 }
373
374 if (!nl)
375 {
376 if (BIO_write(bp,"\n",1) <= 0) goto end;
377 }
378 p+=len;
379 if ((tag == V_ASN1_EOC) && (xclass == 0))
380 {
381 ret=2; /* End of sequence */
382 goto end;
383 }
384 }
385 length-=len;
386 }
387 ret=1;
388end:
389 if (o != NULL) ASN1_OBJECT_free(o);
390 if (os != NULL) ASN1_OCTET_STRING_free(os);
391 *pp=p;
392 return(ret);
393 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-04 12:36:25 +0000