1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58
59 #include <openssl/bio.h>
60 #include <openssl/err.h>
61 #include <openssl/mem.h>
62
63
64 #define ASN1_PARSE_MAXDEPTH 128
65
66 static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
67 int indent);
68 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
69 int offset, int depth, int indent, int dump);
asn1_print_info(BIO * bp,int tag,int xclass,int constructed,int indent)70 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
71 int indent)
72 {
73 static const char fmt[]="%-18s";
74 char str[128];
75 const char *p;
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 (BIO_printf(bp,fmt,p) <= 0)
97 goto err;
98 return(1);
99 err:
100 return(0);
101 }
102
ASN1_parse(BIO * bp,const unsigned char * pp,long len,int indent)103 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
104 {
105 return(asn1_parse2(bp,&pp,len,0,0,indent,0));
106 }
107
ASN1_parse_dump(BIO * bp,const unsigned char * pp,long len,int indent,int dump)108 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
109 {
110 return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
111 }
112
asn1_parse2(BIO * bp,const unsigned char ** pp,long length,int offset,int depth,int indent,int dump)113 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
114 int depth, int indent, int dump)
115 {
116 const unsigned char *p,*ep,*tot,*op,*opp;
117 long len;
118 int tag,xclass,ret=0;
119 int nl,hl,j,r;
120 ASN1_OBJECT *o=NULL;
121 ASN1_OCTET_STRING *os=NULL;
122 /* ASN1_BMPSTRING *bmp=NULL;*/
123 int dump_indent;
124
125 #if 0
126 dump_indent = indent;
127 #else
128 dump_indent = 6; /* Because we know BIO_dump_indent() */
129 #endif
130
131 if (depth > ASN1_PARSE_MAXDEPTH)
132 {
133 BIO_puts(bp, "BAD RECURSION DEPTH\n");
134 return 0;
135 }
136
137 p= *pp;
138 tot=p+length;
139 op=p-1;
140 while ((p < tot) && (op < p))
141 {
142 op=p;
143 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
144 #ifdef LINT
145 j=j;
146 #endif
147 if (j & 0x80)
148 {
149 if (BIO_puts(bp, "Error in encoding\n") <= 0)
150 goto end;
151 ret=0;
152 goto end;
153 }
154 hl=(p-op);
155 length-=hl;
156 /* if j == 0x21 it is a constructed indefinite length object */
157 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
158 <= 0) goto end;
159
160 if (j != (V_ASN1_CONSTRUCTED | 1))
161 {
162 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
163 depth,(long)hl,len) <= 0)
164 goto end;
165 }
166 else
167 {
168 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
169 depth,(long)hl) <= 0)
170 goto end;
171 }
172 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
173 goto end;
174 if (j & V_ASN1_CONSTRUCTED)
175 {
176 ep=p+len;
177 if (BIO_puts(bp, "\n") <= 0) goto end;
178 if (len > length)
179 {
180 BIO_printf(bp,
181 "length is greater than %ld\n",length);
182 ret=0;
183 goto end;
184 }
185 if ((j == 0x21) && (len == 0))
186 {
187 for (;;)
188 {
189 r=asn1_parse2(bp,&p,(long)(tot-p),
190 offset+(p - *pp),depth+1,
191 indent,dump);
192 if (r == 0) { ret=0; goto end; }
193 if ((r == 2) || (p >= tot)) break;
194 }
195 }
196 else
197 while (p < ep)
198 {
199 r=asn1_parse2(bp,&p,(long)len,
200 offset+(p - *pp),depth+1,
201 indent,dump);
202 if (r == 0) { ret=0; goto end; }
203 }
204 }
205 else if (xclass != 0)
206 {
207 p+=len;
208 if (BIO_puts(bp, "\n") <= 0) goto end;
209 }
210 else
211 {
212 nl=0;
213 if ( (tag == V_ASN1_PRINTABLESTRING) ||
214 (tag == V_ASN1_T61STRING) ||
215 (tag == V_ASN1_IA5STRING) ||
216 (tag == V_ASN1_VISIBLESTRING) ||
217 (tag == V_ASN1_NUMERICSTRING) ||
218 (tag == V_ASN1_UTF8STRING) ||
219 (tag == V_ASN1_UTCTIME) ||
220 (tag == V_ASN1_GENERALIZEDTIME))
221 {
222 if (BIO_puts(bp, ":") <= 0) goto end;
223 if ((len > 0) &&
224 BIO_write(bp,(const char *)p,(int)len)
225 != (int)len)
226 goto end;
227 }
228 else if (tag == V_ASN1_OBJECT)
229 {
230 opp=op;
231 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
232 {
233 if (BIO_puts(bp, ":") <= 0) goto end;
234 i2a_ASN1_OBJECT(bp,o);
235 }
236 else
237 {
238 if (BIO_puts(bp, ":BAD OBJECT") <= 0)
239 goto end;
240 }
241 }
242 else if (tag == V_ASN1_BOOLEAN)
243 {
244 int ii;
245
246 opp=op;
247 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
248 if (ii < 0)
249 {
250 if (BIO_puts(bp, "Bad boolean\n") <= 0)
251 goto end;
252 }
253 BIO_printf(bp,":%d",ii);
254 }
255 else if (tag == V_ASN1_BMPSTRING)
256 {
257 /* do the BMP thang */
258 }
259 else if (tag == V_ASN1_OCTET_STRING)
260 {
261 int i,printable=1;
262
263 opp=op;
264 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
265 if (os != NULL && os->length > 0)
266 {
267 opp = os->data;
268 /* testing whether the octet string is
269 * printable */
270 for (i=0; i<os->length; i++)
271 {
272 if (( (opp[i] < ' ') &&
273 (opp[i] != '\n') &&
274 (opp[i] != '\r') &&
275 (opp[i] != '\t')) ||
276 (opp[i] > '~'))
277 {
278 printable=0;
279 break;
280 }
281 }
282 if (printable)
283 /* printable string */
284 {
285 if (BIO_puts(bp, ":") <= 0)
286 goto end;
287 if (BIO_write(bp,(const char *)opp,
288 os->length) <= 0)
289 goto end;
290 }
291 else if (!dump)
292 /* not printable => print octet string
293 * as hex dump */
294 {
295 if (BIO_puts(bp, "[HEX DUMP]:") <= 0)
296 goto end;
297 for (i=0; i<os->length; i++)
298 {
299 if (BIO_printf(bp,"%02X"
300 , opp[i]) <= 0)
301 goto end;
302 }
303 }
304 else
305 /* print the normal dump */
306 {
307 if (!nl)
308 {
309 if (BIO_puts(bp, "\n") <= 0)
310 goto end;
311 }
312 if (!BIO_hexdump(bp, opp,
313 ((dump == -1 || dump >
314 os->length)?os->length:dump),
315 dump_indent))
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_puts(bp, ":") <= 0) goto end;
336 if (bs->type == V_ASN1_NEG_INTEGER)
337 if (BIO_puts(bp, "-") <= 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_puts(bp, "00") <= 0)
348 goto end;
349 }
350 }
351 else
352 {
353 if (BIO_puts(bp, "BAD INTEGER") <= 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_puts(bp, ":") <= 0) goto end;
368 if (bs->type == V_ASN1_NEG_ENUMERATED)
369 if (BIO_puts(bp, "-") <= 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_puts(bp, "00") <= 0)
380 goto end;
381 }
382 }
383 else
384 {
385 if (BIO_puts(bp, "BAD ENUMERATED") <= 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_puts(bp, "\n") <= 0)
395 goto end;
396 }
397 if (!BIO_hexdump(bp,p,
398 ((dump == -1 || dump > len)?len:dump),
399 dump_indent))
400 goto end;
401 nl=1;
402 }
403
404 if (!nl)
405 {
406 if (BIO_puts(bp, "\n") <= 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
ASN1_tag2str(int tag)425 const char *ASN1_tag2str(int tag)
426 {
427 static const char * const 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
445