some const fixes and cleanup
[openssl.git] / crypto / asn1 / asn1_par.c
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 p = ASN1_tag2str(tag);
92
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
106 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
107         {
108         return(asn1_parse2(bp,&pp,len,0,0,indent,0));
109         }
110
111 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
112         {
113         return(asn1_parse2(bp,&pp,len,0,0,indent,dump));
114         }
115
116 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
117              int depth, int indent, int dump)
118         {
119         const unsigned char *p,*ep,*tot,*op,*opp;
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;
125         /* ASN1_BMPSTRING *bmp=NULL;*/
126         int dump_indent;
127
128 #if 0
129         dump_indent = indent;
130 #else
131         dump_indent = 6;        /* Because we know BIO_dump_indent() */
132 #endif
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,
187                                                 indent,dump);
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,
197                                                 indent,dump);
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) ||
212                                 (tag == V_ASN1_VISIBLESTRING) ||
213                                 (tag == V_ASN1_UTCTIME) ||
214                                 (tag == V_ASN1_GENERALIZEDTIME))
215                                 {
216                                 if (BIO_write(bp,":",1) <= 0) goto end;
217                                 if ((len > 0) &&
218                                         BIO_write(bp,(const 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                                 }
249                         else if (tag == V_ASN1_BMPSTRING)
250                                 {
251                                 /* do the BMP thang */
252                                 }
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);
259                                 if (os != NULL && os->length > 0)
260                                         {
261                                         opp = os->data;
262                                         /* testing whether the octet string is
263                                          * printable */
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                                                 }
276                                         if (printable)
277                                         /* printable string */
278                                                 {
279                                                 if (BIO_write(bp,":",1) <= 0)
280                                                         goto end;
281                                                 if (BIO_write(bp,(const char *)opp,
282                                                         os->length) <= 0)
283                                                         goto end;
284                                                 }
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 */
300                                                 {
301                                                 if (!nl) 
302                                                         {
303                                                         if (BIO_write(bp,"\n",1) <= 0)
304                                                                 goto end;
305                                                         }
306                                                 if (BIO_dump_indent(bp,
307                                                         (const char *)opp,
308                                                         ((dump == -1 || dump > 
309                                                         os->length)?os->length:dump),
310                                                         dump_indent) <= 0)
311                                                         goto end;
312                                                 nl=1;
313                                                 }
314                                         }
315                                 if (os != NULL)
316                                         {
317                                         M_ASN1_OCTET_STRING_free(os);
318                                         os=NULL;
319                                         }
320                                 }
321                         else if (tag == V_ASN1_INTEGER)
322                                 {
323                                 ASN1_INTEGER *bs;
324                                 int i;
325
326                                 opp=op;
327                                 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl);
328                                 if (bs != NULL)
329                                         {
330                                         if (BIO_write(bp,":",1) <= 0) goto end;
331                                         if (bs->type == V_ASN1_NEG_INTEGER)
332                                                 if (BIO_write(bp,"-",1) <= 0)
333                                                         goto end;
334                                         for (i=0; i<bs->length; i++)
335                                                 {
336                                                 if (BIO_printf(bp,"%02X",
337                                                         bs->data[i]) <= 0)
338                                                         goto end;
339                                                 }
340                                         if (bs->length == 0)
341                                                 {
342                                                 if (BIO_write(bp,"00",2) <= 0)
343                                                         goto end;
344                                                 }
345                                         }
346                                 else
347                                         {
348                                         if (BIO_write(bp,"BAD INTEGER",11) <= 0)
349                                                 goto end;
350                                         }
351                                 M_ASN1_INTEGER_free(bs);
352                                 }
353                         else if (tag == V_ASN1_ENUMERATED)
354                                 {
355                                 ASN1_ENUMERATED *bs;
356                                 int i;
357
358                                 opp=op;
359                                 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl);
360                                 if (bs != NULL)
361                                         {
362                                         if (BIO_write(bp,":",1) <= 0) goto end;
363                                         if (bs->type == V_ASN1_NEG_ENUMERATED)
364                                                 if (BIO_write(bp,"-",1) <= 0)
365                                                         goto end;
366                                         for (i=0; i<bs->length; i++)
367                                                 {
368                                                 if (BIO_printf(bp,"%02X",
369                                                         bs->data[i]) <= 0)
370                                                         goto end;
371                                                 }
372                                         if (bs->length == 0)
373                                                 {
374                                                 if (BIO_write(bp,"00",2) <= 0)
375                                                         goto end;
376                                                 }
377                                         }
378                                 else
379                                         {
380                                         if (BIO_write(bp,"BAD ENUMERATED",11) <= 0)
381                                                 goto end;
382                                         }
383                                 M_ASN1_ENUMERATED_free(bs);
384                                 }
385                         else if (len > 0 && dump)
386                                 {
387                                 if (!nl) 
388                                         {
389                                         if (BIO_write(bp,"\n",1) <= 0)
390                                                 goto end;
391                                         }
392                                 if (BIO_dump_indent(bp,(const char *)p,
393                                         ((dump == -1 || dump > len)?len:dump),
394                                         dump_indent) <= 0)
395                                         goto end;
396                                 nl=1;
397                                 }
398
399                         if (!nl) 
400                                 {
401                                 if (BIO_write(bp,"\n",1) <= 0) goto end;
402                                 }
403                         p+=len;
404                         if ((tag == V_ASN1_EOC) && (xclass == 0))
405                                 {
406                                 ret=2; /* End of sequence */
407                                 goto end;
408                                 }
409                         }
410                 length-=len;
411                 }
412         ret=1;
413 end:
414         if (o != NULL) ASN1_OBJECT_free(o);
415         if (os != NULL) M_ASN1_OCTET_STRING_free(os);
416         *pp=p;
417         return(ret);
418         }
419
420 const char *ASN1_tag2str(int tag)
421 {
422         const static char *tag2str[] = {
423          "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
424          "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
425          "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",      /* 10-13 */
426         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",                /* 15-17 */
427         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",            /* 18-20 */
428         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */
429         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",          /* 25-27 */
430         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"                 /* 28-30 */
431         };
432
433         if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
434                                                         tag &= ~0x100;
435
436         if(tag < 0 || tag > 30) return "(unknown)";
437         return tag2str[tag];
438 }
439