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 static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed,
65 int indent);
66 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
67 int offset, int depth, int indent, int dump);
asn1_print_info(BIO * bp,int tag,int xclass,int constructed,int indent)68 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
69 int indent)
70 {
71 static const char fmt[]="%-18s";
72 char str[128];
73 const char *p;
74
75 if (constructed & V_ASN1_CONSTRUCTED)
76 p="cons: ";
77 else
78 p="prim: ";
79 if (BIO_write(bp,p,6) < 6) goto err;
80 BIO_indent(bp,indent,128);
81
82 p=str;
83 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
84 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag);
85 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
86 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag);
87 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
88 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag);
89 else if (tag > 30)
90 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag);
91 else
92 p = ASN1_tag2str(tag);
93
94 if (BIO_printf(bp,fmt,p) <= 0)
95 goto err;
96 return(1);
97 err:
98 return(0);
99 }
100
ASN1_parse(BIO * bp,const unsigned char * pp,long len,int indent)101 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
102 {
103 return(asn1_parse2(bp,&pp,len,0,0,indent,0));
104 }
105
ASN1_parse_dump(BIO * bp,const unsigned char * pp,long len,int indent,int dump)106 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
107 {
108 return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
109 }
110
asn1_parse2(BIO * bp,const unsigned char ** pp,long length,int offset,int depth,int indent,int dump)111 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
112 int depth, int indent, int dump)
113 {
114 const unsigned char *p,*ep,*tot,*op,*opp;
115 long len;
116 int tag,xclass,ret=0;
117 int nl,hl,j,r;
118 ASN1_OBJECT *o=NULL;
119 ASN1_OCTET_STRING *os=NULL;
120 /* ASN1_BMPSTRING *bmp=NULL;*/
121 int dump_indent;
122
123 #if 0
124 dump_indent = indent;
125 #else
126 dump_indent = 6; /* Because we know BIO_dump_indent() */
127 #endif
128 p= *pp;
129 tot=p+length;
130 op=p-1;
131 while ((p < tot) && (op < p))
132 {
133 op=p;
134 j=ASN1_get_object(&p,&len,&tag,&xclass,length);
135 #ifdef LINT
136 j=j;
137 #endif
138 if (j & 0x80)
139 {
140 if (BIO_puts(bp, "Error in encoding\n") <= 0)
141 goto end;
142 ret=0;
143 goto end;
144 }
145 hl=(p-op);
146 length-=hl;
147 /* if j == 0x21 it is a constructed indefinite length object */
148 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp))
149 <= 0) goto end;
150
151 if (j != (V_ASN1_CONSTRUCTED | 1))
152 {
153 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ",
154 depth,(long)hl,len) <= 0)
155 goto end;
156 }
157 else
158 {
159 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ",
160 depth,(long)hl) <= 0)
161 goto end;
162 }
163 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0))
164 goto end;
165 if (j & V_ASN1_CONSTRUCTED)
166 {
167 ep=p+len;
168 if (BIO_puts(bp, "\n") <= 0) goto end;
169 if (len > length)
170 {
171 BIO_printf(bp,
172 "length is greater than %ld\n",length);
173 ret=0;
174 goto end;
175 }
176 if ((j == 0x21) && (len == 0))
177 {
178 for (;;)
179 {
180 r=asn1_parse2(bp,&p,(long)(tot-p),
181 offset+(p - *pp),depth+1,
182 indent,dump);
183 if (r == 0) { ret=0; goto end; }
184 if ((r == 2) || (p >= tot)) break;
185 }
186 }
187 else
188 while (p < ep)
189 {
190 r=asn1_parse2(bp,&p,(long)len,
191 offset+(p - *pp),depth+1,
192 indent,dump);
193 if (r == 0) { ret=0; goto end; }
194 }
195 }
196 else if (xclass != 0)
197 {
198 p+=len;
199 if (BIO_puts(bp, "\n") <= 0) goto end;
200 }
201 else
202 {
203 nl=0;
204 if ( (tag == V_ASN1_PRINTABLESTRING) ||
205 (tag == V_ASN1_T61STRING) ||
206 (tag == V_ASN1_IA5STRING) ||
207 (tag == V_ASN1_VISIBLESTRING) ||
208 (tag == V_ASN1_NUMERICSTRING) ||
209 (tag == V_ASN1_UTF8STRING) ||
210 (tag == V_ASN1_UTCTIME) ||
211 (tag == V_ASN1_GENERALIZEDTIME))
212 {
213 if (BIO_puts(bp, ":") <= 0) goto end;
214 if ((len > 0) &&
215 BIO_write(bp,(const char *)p,(int)len)
216 != (int)len)
217 goto end;
218 }
219 else if (tag == V_ASN1_OBJECT)
220 {
221 opp=op;
222 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL)
223 {
224 if (BIO_puts(bp, ":") <= 0) goto end;
225 i2a_ASN1_OBJECT(bp,o);
226 }
227 else
228 {
229 if (BIO_puts(bp, ":BAD OBJECT") <= 0)
230 goto end;
231 }
232 }
233 else if (tag == V_ASN1_BOOLEAN)
234 {
235 int ii;
236
237 opp=op;
238 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl);
239 if (ii < 0)
240 {
241 if (BIO_puts(bp, "Bad boolean\n") <= 0)
242 goto end;
243 }
244 BIO_printf(bp,":%d",ii);
245 }
246 else if (tag == V_ASN1_BMPSTRING)
247 {
248 /* do the BMP thang */
249 }
250 else if (tag == V_ASN1_OCTET_STRING)
251 {
252 int i,printable=1;
253
254 opp=op;
255 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl);
256 if (os != NULL && os->length > 0)
257 {
258 opp = os->data;
259 /* testing whether the octet string is
260 * printable */
261 for (i=0; i<os->length; i++)
262 {
263 if (( (opp[i] < ' ') &&
264 (opp[i] != '\n') &&
265 (opp[i] != '\r') &&
266 (opp[i] != '\t')) ||
267 (opp[i] > '~'))
268 {
269 printable=0;
270 break;
271 }
272 }
273 if (printable)
274 /* printable string */
275 {
276 if (BIO_puts(bp, ":") <= 0)
277 goto end;
278 if (BIO_write(bp,(const char *)opp,
279 os->length) <= 0)
280 goto end;
281 }
282 else if (!dump)
283 /* not printable => print octet string
284 * as hex dump */
285 {
286 if (BIO_puts(bp, "[HEX DUMP]:") <= 0)
287 goto end;
288 for (i=0; i<os->length; i++)
289 {
290 if (BIO_printf(bp,"%02X"
291 , opp[i]) <= 0)
292 goto end;
293 }
294 }
295 else
296 /* print the normal dump */
297 {
298 if (!nl)
299 {
300 if (BIO_puts(bp, "\n") <= 0)
301 goto end;
302 }
303 if (!BIO_hexdump(bp, opp,
304 ((dump == -1 || dump >
305 os->length)?os->length:dump),
306 dump_indent))
307 goto end;
308 nl=1;
309 }
310 }
311 if (os != NULL)
312 {
313 M_ASN1_OCTET_STRING_free(os);
314 os=NULL;
315 }
316 }
317 else if (tag == V_ASN1_INTEGER)
318 {
319 ASN1_INTEGER *bs;
320 int i;
321
322 opp=op;
323 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
324 if (bs != NULL)
325 {
326 if (BIO_puts(bp, ":") <= 0) goto end;
327 if (bs->type == V_ASN1_NEG_INTEGER)
328 if (BIO_puts(bp, "-") <= 0)
329 goto end;
330 for (i=0; i<bs->length; i++)
331 {
332 if (BIO_printf(bp,"%02X",
333 bs->data[i]) <= 0)
334 goto end;
335 }
336 if (bs->length == 0)
337 {
338 if (BIO_puts(bp, "00") <= 0)
339 goto end;
340 }
341 }
342 else
343 {
344 if (BIO_puts(bp, "BAD INTEGER") <= 0)
345 goto end;
346 }
347 M_ASN1_INTEGER_free(bs);
348 }
349 else if (tag == V_ASN1_ENUMERATED)
350 {
351 ASN1_ENUMERATED *bs;
352 int i;
353
354 opp=op;
355 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
356 if (bs != NULL)
357 {
358 if (BIO_puts(bp, ":") <= 0) goto end;
359 if (bs->type == V_ASN1_NEG_ENUMERATED)
360 if (BIO_puts(bp, "-") <= 0)
361 goto end;
362 for (i=0; i<bs->length; i++)
363 {
364 if (BIO_printf(bp,"%02X",
365 bs->data[i]) <= 0)
366 goto end;
367 }
368 if (bs->length == 0)
369 {
370 if (BIO_puts(bp, "00") <= 0)
371 goto end;
372 }
373 }
374 else
375 {
376 if (BIO_puts(bp, "BAD ENUMERATED") <= 0)
377 goto end;
378 }
379 M_ASN1_ENUMERATED_free(bs);
380 }
381 else if (len > 0 && dump)
382 {
383 if (!nl)
384 {
385 if (BIO_puts(bp, "\n") <= 0)
386 goto end;
387 }
388 if (!BIO_hexdump(bp,p,
389 ((dump == -1 || dump > len)?len:dump),
390 dump_indent))
391 goto end;
392 nl=1;
393 }
394
395 if (!nl)
396 {
397 if (BIO_puts(bp, "\n") <= 0) goto end;
398 }
399 p+=len;
400 if ((tag == V_ASN1_EOC) && (xclass == 0))
401 {
402 ret=2; /* End of sequence */
403 goto end;
404 }
405 }
406 length-=len;
407 }
408 ret=1;
409 end:
410 if (o != NULL) ASN1_OBJECT_free(o);
411 if (os != NULL) M_ASN1_OCTET_STRING_free(os);
412 *pp=p;
413 return(ret);
414 }
415
ASN1_tag2str(int tag)416 const char *ASN1_tag2str(int tag)
417 {
418 static const char * const tag2str[] = {
419 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
420 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
421 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
422 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
423 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
424 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
425 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
426 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
427 };
428
429 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
430 tag &= ~0x100;
431
432 if(tag < 0 || tag > 30) return "(unknown)";
433 return tag2str[tag];
434 }
435
436