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[dragonfly.git] / crypto / openssl / crypto / asn1 / asn1_par.c
blob8657f73d66a2cd6a73f68a238443625a1f52c092
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 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);
105 err:
106 return(0);
107 }
108
109 int 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
114 int 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
119 static 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_NUMERICSTRING) ||
217 (tag == V_ASN1_UTF8STRING) ||
218 (tag == V_ASN1_UTCTIME) ||
219 (tag == V_ASN1_GENERALIZEDTIME))
220 {
221 if (BIO_write(bp,":",1) <= 0) goto end;
222 if ((len > 0) &&
223 BIO_write(bp,(const char *)p,(int)len)
224 != (int)len)
225 goto end;
226 }
227 else if (tag == V_ASN1_OBJECT)
228 {
229 opp=op;
230 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
231 {
232 if (BIO_write(bp,":",1) <= 0) goto end;
233 i2a_ASN1_OBJECT(bp,o);
234 }
235 else
236 {
237 if (BIO_write(bp,":BAD OBJECT",11) <= 0)
238 goto end;
239 }
240 }
241 else if (tag == V_ASN1_BOOLEAN)
242 {
243 int ii;
244
245 opp=op;
246 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
247 if (ii < 0)
248 {
249 if (BIO_write(bp,"Bad boolean\n",12))
250 goto end;
251 }
252 BIO_printf(bp,":%d",ii);
253 }
254 else if (tag == V_ASN1_BMPSTRING)
255 {
256 /* do the BMP thang */
257 }
258 else if (tag == V_ASN1_OCTET_STRING)
259 {
260 int i,printable=1;
261
262 opp=op;
263 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
264 if (os != NULL && os->length > 0)
265 {
266 opp = os->data;
267 /* testing whether the octet string is
268 * printable */
269 for (i=0; i<os->length; i++)
270 {
271 if (( (opp[i] < ' ') &&
272 (opp[i] != '\n') &&
273 (opp[i] != '\r') &&
274 (opp[i] != '\t')) ||
275 (opp[i] > '~'))
276 {
277 printable=0;
278 break;
279 }
280 }
281 if (printable)
282 /* printable string */
283 {
284 if (BIO_write(bp,":",1) <= 0)
285 goto end;
286 if (BIO_write(bp,(const char *)opp,
287 os->length) <= 0)
288 goto end;
289 }
290 else if (!dump)
291 /* not printable => print octet string
292 * as hex dump */
293 {
294 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0)
295 goto end;
296 for (i=0; i<os->length; i++)
297 {
298 if (BIO_printf(bp,"%02X"
299 , opp[i]) <= 0)
300 goto end;
301 }
302 }
303 else
304 /* print the normal dump */
305 {
306 if (!nl)
307 {
308 if (BIO_write(bp,"\n",1) <= 0)
309 goto end;
310 }
311 if (BIO_dump_indent(bp,
312 (const char *)opp,
313 ((dump == -1 || dump >
314 os->length)?os->length:dump),
315 dump_indent) <= 0)
316 goto end;
317 nl=1;
318 }
319 }
320 if (os != NULL)
321 {
322 M_ASN1_OCTET_STRING_free(os);
323 os=NULL;
324 }
325 }
326 else if (tag == V_ASN1_INTEGER)
327 {
328 ASN1_INTEGER *bs;
329 int i;
330
331 opp=op;
332 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
333 if (bs != NULL)
334 {
335 if (BIO_write(bp,":",1) <= 0) goto end;
336 if (bs->type == V_ASN1_NEG_INTEGER)
337 if (BIO_write(bp,"-",1) <= 0)
338 goto end;
339 for (i=0; i<bs->length; i++)
340 {
341 if (BIO_printf(bp,"%02X",
342 bs->data[i]) <= 0)
343 goto end;
344 }
345 if (bs->length == 0)
346 {
347 if (BIO_write(bp,"00",2) <= 0)
348 goto end;
349 }
350 }
351 else
352 {
353 if (BIO_write(bp,"BAD INTEGER",11) <= 0)
354 goto end;
355 }
356 M_ASN1_INTEGER_free(bs);
357 }
358 else if (tag == V_ASN1_ENUMERATED)
359 {
360 ASN1_ENUMERATED *bs;
361 int i;
362
363 opp=op;
364 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
365 if (bs != NULL)
366 {
367 if (BIO_write(bp,":",1) <= 0) goto end;
368 if (bs->type == V_ASN1_NEG_ENUMERATED)
369 if (BIO_write(bp,"-",1) <= 0)
370 goto end;
371 for (i=0; i<bs->length; i++)
372 {
373 if (BIO_printf(bp,"%02X",
374 bs->data[i]) <= 0)
375 goto end;
376 }
377 if (bs->length == 0)
378 {
379 if (BIO_write(bp,"00",2) <= 0)
380 goto end;
381 }
382 }
383 else
384 {
385 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
386 goto end;
387 }
388 M_ASN1_ENUMERATED_free(bs);
389 }
390 else if (len > 0 && dump)
391 {
392 if (!nl)
393 {
394 if (BIO_write(bp,"\n",1) <= 0)
395 goto end;
396 }
397 if (BIO_dump_indent(bp,(const char *)p,
398 ((dump == -1 || dump > len)?len:dump),
399 dump_indent) <= 0)
400 goto end;
401 nl=1;
402 }
403
404 if (!nl)
405 {
406 if (BIO_write(bp,"\n",1) <= 0) goto end;
407 }
408 p+=len;
409 if ((tag == V_ASN1_EOC) && (xclass == 0))
410 {
411 ret=2; /* End of sequence */
412 goto end;
413 }
414 }
415 length-=len;
416 }
417 ret=1;
418 end:
419 if (o != NULL) ASN1_OBJECT_free(o);
420 if (os != NULL) M_ASN1_OCTET_STRING_free(os);
421 *pp=p;
422 return(ret);
423 }
424
425 const char *ASN1_tag2str(int tag)
426 {
427 static const char *tag2str[] = {
428 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
429 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
430 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
431 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
432 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
433 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
434 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
435 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
436 };
437
438 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
439 tag &= ~0x100;
440
441 if(tag < 0 || tag > 30) return "(unknown)";
442 return tag2str[tag];
443 }
444
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