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d02b48c6 | 1 | /* crypto/asn1/asn1_par.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/buffer.h> |
62 | #include <openssl/objects.h> | |
f66c3032 | 63 | #include <openssl/asn1.h> |
d02b48c6 | 64 | |
d02b48c6 RE |
65 | static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed, |
66 | int indent); | |
875a644a | 67 | static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, |
ca1e465f | 68 | int offset, int depth, int indent, int dump); |
6b691a5c UM |
69 | static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, |
70 | int indent) | |
d02b48c6 | 71 | { |
e778802f BL |
72 | static const char fmt[]="%-18s"; |
73 | static const char fmt2[]="%2d %-15s"; | |
74 | char str[128]; | |
75 | const char *p,*p2=NULL; | |
d02b48c6 RE |
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; | |
54a656ef | 82 | BIO_indent(bp,indent,128); |
d02b48c6 RE |
83 | |
84 | p=str; | |
85 | if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) | |
d420ac2c | 86 | BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag); |
d02b48c6 | 87 | else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) |
d420ac2c | 88 | BIO_snprintf(str,sizeof str,"cont [ %d ]",tag); |
d02b48c6 | 89 | else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) |
d420ac2c | 90 | BIO_snprintf(str,sizeof str,"appl [ %d ]",tag); |
a785abc3 | 91 | else p = ASN1_tag2str(tag); |
d02b48c6 | 92 | |
d02b48c6 RE |
93 | if (p2 != NULL) |
94 | { | |
95 | if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; | |
96 | } | |
97 | else | |
98 | { | |
99 | if (BIO_printf(bp,fmt,p) <= 0) goto err; | |
100 | } | |
101 | return(1); | |
102 | err: | |
103 | return(0); | |
104 | } | |
105 | ||
875a644a | 106 | int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) |
d02b48c6 | 107 | { |
ca1e465f RL |
108 | return(asn1_parse2(bp,&pp,len,0,0,indent,0)); |
109 | } | |
110 | ||
875a644a | 111 | int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) |
ca1e465f RL |
112 | { |
113 | return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); | |
d02b48c6 RE |
114 | } |
115 | ||
875a644a | 116 | static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, |
ca1e465f | 117 | int depth, int indent, int dump) |
d02b48c6 | 118 | { |
875a644a | 119 | const unsigned char *p,*ep,*tot,*op,*opp; |
d02b48c6 RE |
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; | |
58964a49 | 125 | /* ASN1_BMPSTRING *bmp=NULL;*/ |
ca1e465f | 126 | int dump_indent; |
d02b48c6 | 127 | |
ca1e465f RL |
128 | #if 0 |
129 | dump_indent = indent; | |
130 | #else | |
131 | dump_indent = 6; /* Because we know BIO_dump_indent() */ | |
132 | #endif | |
d02b48c6 RE |
133 | p= *pp; |
134 | tot=p+length; | |
135 | op=p-1; | |
136 | while ((p < tot) && (op < p)) | |
137 | { | |
138 | op=p; | |
139 | j=ASN1_get_object(&p,&len,&tag,&xclass,length); | |
140 | #ifdef LINT | |
141 | j=j; | |
142 | #endif | |
143 | if (j & 0x80) | |
144 | { | |
145 | if (BIO_write(bp,"Error in encoding\n",18) <= 0) | |
146 | goto end; | |
147 | ret=0; | |
148 | goto end; | |
149 | } | |
150 | hl=(p-op); | |
151 | length-=hl; | |
152 | /* if j == 0x21 it is a constructed indefinite length object */ | |
153 | if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) | |
154 | <= 0) goto end; | |
155 | ||
156 | if (j != (V_ASN1_CONSTRUCTED | 1)) | |
157 | { | |
158 | if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", | |
159 | depth,(long)hl,len) <= 0) | |
160 | goto end; | |
161 | } | |
162 | else | |
163 | { | |
164 | if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", | |
165 | depth,(long)hl) <= 0) | |
166 | goto end; | |
167 | } | |
168 | if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) | |
169 | goto end; | |
170 | if (j & V_ASN1_CONSTRUCTED) | |
171 | { | |
172 | ep=p+len; | |
173 | if (BIO_write(bp,"\n",1) <= 0) goto end; | |
174 | if (len > length) | |
175 | { | |
176 | BIO_printf(bp, | |
177 | "length is greater than %ld\n",length); | |
178 | ret=0; | |
179 | goto end; | |
180 | } | |
181 | if ((j == 0x21) && (len == 0)) | |
182 | { | |
183 | for (;;) | |
184 | { | |
185 | r=asn1_parse2(bp,&p,(long)(tot-p), | |
186 | offset+(p - *pp),depth+1, | |
ca1e465f | 187 | indent,dump); |
d02b48c6 RE |
188 | if (r == 0) { ret=0; goto end; } |
189 | if ((r == 2) || (p >= tot)) break; | |
190 | } | |
191 | } | |
192 | else | |
193 | while (p < ep) | |
194 | { | |
195 | r=asn1_parse2(bp,&p,(long)len, | |
196 | offset+(p - *pp),depth+1, | |
ca1e465f | 197 | indent,dump); |
d02b48c6 RE |
198 | if (r == 0) { ret=0; goto end; } |
199 | } | |
200 | } | |
201 | else if (xclass != 0) | |
202 | { | |
203 | p+=len; | |
204 | if (BIO_write(bp,"\n",1) <= 0) goto end; | |
205 | } | |
206 | else | |
207 | { | |
208 | nl=0; | |
209 | if ( (tag == V_ASN1_PRINTABLESTRING) || | |
210 | (tag == V_ASN1_T61STRING) || | |
211 | (tag == V_ASN1_IA5STRING) || | |
c83e523d | 212 | (tag == V_ASN1_VISIBLESTRING) || |
dfeab068 RE |
213 | (tag == V_ASN1_UTCTIME) || |
214 | (tag == V_ASN1_GENERALIZEDTIME)) | |
d02b48c6 RE |
215 | { |
216 | if (BIO_write(bp,":",1) <= 0) goto end; | |
217 | if ((len > 0) && | |
218 | BIO_write(bp,(char *)p,(int)len) | |
219 | != (int)len) | |
220 | goto end; | |
221 | } | |
222 | else if (tag == V_ASN1_OBJECT) | |
223 | { | |
224 | opp=op; | |
225 | if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) | |
226 | { | |
227 | if (BIO_write(bp,":",1) <= 0) goto end; | |
228 | i2a_ASN1_OBJECT(bp,o); | |
229 | } | |
230 | else | |
231 | { | |
232 | if (BIO_write(bp,":BAD OBJECT",11) <= 0) | |
233 | goto end; | |
234 | } | |
235 | } | |
236 | else if (tag == V_ASN1_BOOLEAN) | |
237 | { | |
238 | int ii; | |
239 | ||
240 | opp=op; | |
241 | ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); | |
242 | if (ii < 0) | |
243 | { | |
244 | if (BIO_write(bp,"Bad boolean\n",12)) | |
245 | goto end; | |
246 | } | |
247 | BIO_printf(bp,":%d",ii); | |
248 | } | |
58964a49 RE |
249 | else if (tag == V_ASN1_BMPSTRING) |
250 | { | |
251 | /* do the BMP thang */ | |
252 | } | |
d02b48c6 RE |
253 | else if (tag == V_ASN1_OCTET_STRING) |
254 | { | |
255 | int i,printable=1; | |
256 | ||
257 | opp=op; | |
258 | os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); | |
ea4f109c | 259 | if (os != NULL && os->length > 0) |
d02b48c6 | 260 | { |
ea4f109c BM |
261 | opp = os->data; |
262 | /* testing whether the octet string is | |
263 | * printable */ | |
d02b48c6 RE |
264 | for (i=0; i<os->length; i++) |
265 | { | |
266 | if (( (opp[i] < ' ') && | |
267 | (opp[i] != '\n') && | |
268 | (opp[i] != '\r') && | |
269 | (opp[i] != '\t')) || | |
270 | (opp[i] > '~')) | |
271 | { | |
272 | printable=0; | |
273 | break; | |
274 | } | |
275 | } | |
ea4f109c BM |
276 | if (printable) |
277 | /* printable string */ | |
d02b48c6 RE |
278 | { |
279 | if (BIO_write(bp,":",1) <= 0) | |
280 | goto end; | |
281 | if (BIO_write(bp,(char *)opp, | |
282 | os->length) <= 0) | |
283 | goto end; | |
284 | } | |
ea4f109c BM |
285 | else if (!dump) |
286 | /* not printable => print octet string | |
287 | * as hex dump */ | |
288 | { | |
289 | if (BIO_write(bp,"[HEX DUMP]:",11) <= 0) | |
290 | goto end; | |
291 | for (i=0; i<os->length; i++) | |
292 | { | |
293 | if (BIO_printf(bp,"%02X" | |
294 | , opp[i]) <= 0) | |
295 | goto end; | |
296 | } | |
297 | } | |
298 | else | |
299 | /* print the normal dump */ | |
ca1e465f RL |
300 | { |
301 | if (!nl) | |
302 | { | |
303 | if (BIO_write(bp,"\n",1) <= 0) | |
304 | goto end; | |
305 | } | |
2d978cbd | 306 | if (BIO_dump_indent(bp,(char *)opp, |
ea4f109c BM |
307 | ((dump == -1 || dump > |
308 | os->length)?os->length:dump), | |
ca1e465f RL |
309 | dump_indent) <= 0) |
310 | goto end; | |
311 | nl=1; | |
312 | } | |
ea4f109c BM |
313 | } |
314 | if (os != NULL) | |
315 | { | |
08e9c1af | 316 | M_ASN1_OCTET_STRING_free(os); |
d02b48c6 RE |
317 | os=NULL; |
318 | } | |
319 | } | |
320 | else if (tag == V_ASN1_INTEGER) | |
321 | { | |
322 | ASN1_INTEGER *bs; | |
323 | int i; | |
324 | ||
325 | opp=op; | |
326 | bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); | |
327 | if (bs != NULL) | |
328 | { | |
329 | if (BIO_write(bp,":",1) <= 0) goto end; | |
330 | if (bs->type == V_ASN1_NEG_INTEGER) | |
331 | if (BIO_write(bp,"-",1) <= 0) | |
332 | goto end; | |
333 | for (i=0; i<bs->length; i++) | |
334 | { | |
335 | if (BIO_printf(bp,"%02X", | |
336 | bs->data[i]) <= 0) | |
337 | goto end; | |
338 | } | |
339 | if (bs->length == 0) | |
340 | { | |
341 | if (BIO_write(bp,"00",2) <= 0) | |
342 | goto end; | |
343 | } | |
344 | } | |
345 | else | |
346 | { | |
347 | if (BIO_write(bp,"BAD INTEGER",11) <= 0) | |
348 | goto end; | |
349 | } | |
08e9c1af | 350 | M_ASN1_INTEGER_free(bs); |
d02b48c6 | 351 | } |
bceacf93 DSH |
352 | else if (tag == V_ASN1_ENUMERATED) |
353 | { | |
354 | ASN1_ENUMERATED *bs; | |
355 | int i; | |
356 | ||
357 | opp=op; | |
358 | bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); | |
359 | if (bs != NULL) | |
360 | { | |
361 | if (BIO_write(bp,":",1) <= 0) goto end; | |
362 | if (bs->type == V_ASN1_NEG_ENUMERATED) | |
363 | if (BIO_write(bp,"-",1) <= 0) | |
364 | goto end; | |
365 | for (i=0; i<bs->length; i++) | |
366 | { | |
367 | if (BIO_printf(bp,"%02X", | |
368 | bs->data[i]) <= 0) | |
369 | goto end; | |
370 | } | |
371 | if (bs->length == 0) | |
372 | { | |
373 | if (BIO_write(bp,"00",2) <= 0) | |
374 | goto end; | |
375 | } | |
376 | } | |
377 | else | |
378 | { | |
379 | if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) | |
380 | goto end; | |
381 | } | |
08e9c1af | 382 | M_ASN1_ENUMERATED_free(bs); |
bceacf93 | 383 | } |
ca1e465f RL |
384 | else if (len > 0 && dump) |
385 | { | |
386 | if (!nl) | |
387 | { | |
388 | if (BIO_write(bp,"\n",1) <= 0) | |
389 | goto end; | |
390 | } | |
2d978cbd | 391 | if (BIO_dump_indent(bp,(char *)p, |
ca1e465f RL |
392 | ((dump == -1 || dump > len)?len:dump), |
393 | dump_indent) <= 0) | |
394 | goto end; | |
395 | nl=1; | |
396 | } | |
d02b48c6 RE |
397 | |
398 | if (!nl) | |
399 | { | |
400 | if (BIO_write(bp,"\n",1) <= 0) goto end; | |
401 | } | |
402 | p+=len; | |
403 | if ((tag == V_ASN1_EOC) && (xclass == 0)) | |
404 | { | |
405 | ret=2; /* End of sequence */ | |
406 | goto end; | |
407 | } | |
408 | } | |
409 | length-=len; | |
410 | } | |
411 | ret=1; | |
412 | end: | |
413 | if (o != NULL) ASN1_OBJECT_free(o); | |
08e9c1af | 414 | if (os != NULL) M_ASN1_OCTET_STRING_free(os); |
d02b48c6 RE |
415 | *pp=p; |
416 | return(ret); | |
417 | } | |
a785abc3 DSH |
418 | |
419 | const char *ASN1_tag2str(int tag) | |
420 | { | |
421 | const static char *tag2str[] = { | |
422 | "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ | |
423 | "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ | |
424 | "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ | |
425 | "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ | |
426 | "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ | |
2d681b77 | 427 | "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ |
a785abc3 DSH |
428 | "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ |
429 | "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ | |
430 | }; | |
431 | ||
432 | if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) | |
433 | tag &= ~0x100; | |
434 | ||
435 | if(tag < 0 || tag > 30) return "(unknown)"; | |
436 | return tag2str[tag]; | |
437 | } | |
438 |