avoid "statement not reached" warning
[openssl.git] / crypto / objects / obj_dat.c
1 /* crypto/objects/obj_dat.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 <ctype.h>
61 #include "cryptlib.h"
62 #include <openssl/lhash.h>
63 #include <openssl/asn1.h>
64 #include <openssl/objects.h>
65
66 /* obj_dat.h is generated from objects.h by obj_dat.pl */
67 #ifndef OPENSSL_NO_OBJECT
68 #include "obj_dat.h"
69 #else
70 /* You will have to load all the objects needed manually in the application */
71 #define NUM_NID 0
72 #define NUM_SN 0
73 #define NUM_LN 0
74 #define NUM_OBJ 0
75 static unsigned char lvalues[1];
76 static ASN1_OBJECT nid_objs[1];
77 static ASN1_OBJECT *sn_objs[1];
78 static ASN1_OBJECT *ln_objs[1];
79 static ASN1_OBJECT *obj_objs[1];
80 #endif
81
82 static int sn_cmp(const void *a, const void *b);
83 static int ln_cmp(const void *a, const void *b);
84 static int obj_cmp(const void *a, const void *b);
85 #define ADDED_DATA      0
86 #define ADDED_SNAME     1
87 #define ADDED_LNAME     2
88 #define ADDED_NID       3
89
90 typedef struct added_obj_st
91         {
92         int type;
93         ASN1_OBJECT *obj;
94         } ADDED_OBJ;
95
96 static int new_nid=NUM_NID;
97 static LHASH *added=NULL;
98
99 static int sn_cmp(const void *a, const void *b)
100         {
101         const ASN1_OBJECT * const *ap = a, * const *bp = b;
102         return(strcmp((*ap)->sn,(*bp)->sn));
103         }
104
105 static int ln_cmp(const void *a, const void *b)
106         { 
107         const ASN1_OBJECT * const *ap = a, * const *bp = b;
108         return(strcmp((*ap)->ln,(*bp)->ln));
109         }
110
111 /* static unsigned long add_hash(ADDED_OBJ *ca) */
112 static unsigned long add_hash(const void *ca_void)
113         {
114         const ASN1_OBJECT *a;
115         int i;
116         unsigned long ret=0;
117         unsigned char *p;
118         ADDED_OBJ *ca = (ADDED_OBJ *)ca_void;
119
120         a=ca->obj;
121         switch (ca->type)
122                 {
123         case ADDED_DATA:
124                 ret=a->length<<20L;
125                 p=(unsigned char *)a->data;
126                 for (i=0; i<a->length; i++)
127                         ret^=p[i]<<((i*3)%24);
128                 break;
129         case ADDED_SNAME:
130                 ret=lh_strhash(a->sn);
131                 break;
132         case ADDED_LNAME:
133                 ret=lh_strhash(a->ln);
134                 break;
135         case ADDED_NID:
136                 ret=a->nid;
137                 break;
138         default:
139                 /* abort(); */
140                 return 0;
141                 }
142         ret&=0x3fffffffL;
143         ret|=ca->type<<30L;
144         return(ret);
145         }
146
147 /* static int add_cmp(ADDED_OBJ *ca, ADDED_OBJ *cb) */
148 static int add_cmp(const void *ca_void, const void *cb_void)
149         {
150         ASN1_OBJECT *a,*b;
151         int i;
152         ADDED_OBJ *ca = (ADDED_OBJ *)ca_void;
153         ADDED_OBJ *cb = (ADDED_OBJ *)cb_void;
154
155         i=ca->type-cb->type;
156         if (i) return(i);
157         a=ca->obj;
158         b=cb->obj;
159         switch (ca->type)
160                 {
161         case ADDED_DATA:
162                 i=(a->length - b->length);
163                 if (i) return(i);
164                 return(memcmp(a->data,b->data,a->length));
165         case ADDED_SNAME:
166                 if (a->sn == NULL) return(-1);
167                 else if (b->sn == NULL) return(1);
168                 else return(strcmp(a->sn,b->sn));
169         case ADDED_LNAME:
170                 if (a->ln == NULL) return(-1);
171                 else if (b->ln == NULL) return(1);
172                 else return(strcmp(a->ln,b->ln));
173         case ADDED_NID:
174                 return(a->nid-b->nid);
175         default:
176                 /* abort(); */
177                 return 0;
178                 }
179         }
180
181 static int init_added(void)
182         {
183         if (added != NULL) return(1);
184         added=lh_new(add_hash,add_cmp);
185         return(added != NULL);
186         }
187
188 static void cleanup1(ADDED_OBJ *a)
189         {
190         a->obj->nid=0;
191         a->obj->flags|=ASN1_OBJECT_FLAG_DYNAMIC|
192                         ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
193                         ASN1_OBJECT_FLAG_DYNAMIC_DATA;
194         }
195
196 static void cleanup2(ADDED_OBJ *a)
197         { a->obj->nid++; }
198
199 static void cleanup3(ADDED_OBJ *a)
200         {
201         if (--a->obj->nid == 0)
202                 ASN1_OBJECT_free(a->obj);
203         OPENSSL_free(a);
204         }
205
206 static IMPLEMENT_LHASH_DOALL_FN(cleanup1, ADDED_OBJ *)
207 static IMPLEMENT_LHASH_DOALL_FN(cleanup2, ADDED_OBJ *)
208 static IMPLEMENT_LHASH_DOALL_FN(cleanup3, ADDED_OBJ *)
209
210 void OBJ_cleanup(void)
211         {
212         if (added == NULL) return;
213         added->down_load=0;
214         lh_doall(added,LHASH_DOALL_FN(cleanup1)); /* zero counters */
215         lh_doall(added,LHASH_DOALL_FN(cleanup2)); /* set counters */
216         lh_doall(added,LHASH_DOALL_FN(cleanup3)); /* free objects */
217         lh_free(added);
218         added=NULL;
219         }
220
221 int OBJ_new_nid(int num)
222         {
223         int i;
224
225         i=new_nid;
226         new_nid+=num;
227         return(i);
228         }
229
230 int OBJ_add_object(const ASN1_OBJECT *obj)
231         {
232         ASN1_OBJECT *o;
233         ADDED_OBJ *ao[4]={NULL,NULL,NULL,NULL},*aop;
234         int i;
235
236         if (added == NULL)
237                 if (!init_added()) return(0);
238         if ((o=OBJ_dup(obj)) == NULL) goto err;
239         ao[ADDED_NID]=(ADDED_OBJ *)OPENSSL_malloc(sizeof(ADDED_OBJ));
240         if ((o->length != 0) && (obj->data != NULL))
241                 ao[ADDED_DATA]=(ADDED_OBJ *)OPENSSL_malloc(sizeof(ADDED_OBJ));
242         if (o->sn != NULL)
243                 ao[ADDED_SNAME]=(ADDED_OBJ *)OPENSSL_malloc(sizeof(ADDED_OBJ));
244         if (o->ln != NULL)
245                 ao[ADDED_LNAME]=(ADDED_OBJ *)OPENSSL_malloc(sizeof(ADDED_OBJ));
246
247         for (i=ADDED_DATA; i<=ADDED_NID; i++)
248                 {
249                 if (ao[i] != NULL)
250                         {
251                         ao[i]->type=i;
252                         ao[i]->obj=o;
253                         aop=(ADDED_OBJ *)lh_insert(added,ao[i]);
254                         /* memory leak, buit should not normally matter */
255                         if (aop != NULL)
256                                 OPENSSL_free(aop);
257                         }
258                 }
259         o->flags&= ~(ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
260                         ASN1_OBJECT_FLAG_DYNAMIC_DATA);
261
262         return(o->nid);
263 err:
264         for (i=ADDED_DATA; i<=ADDED_NID; i++)
265                 if (ao[i] != NULL) OPENSSL_free(ao[i]);
266         if (o != NULL) OPENSSL_free(o);
267         return(NID_undef);
268         }
269
270 ASN1_OBJECT *OBJ_nid2obj(int n)
271         {
272         ADDED_OBJ ad,*adp;
273         ASN1_OBJECT ob;
274
275         if ((n >= 0) && (n < NUM_NID))
276                 {
277                 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef))
278                         {
279                         OBJerr(OBJ_F_OBJ_NID2OBJ,OBJ_R_UNKNOWN_NID);
280                         return(NULL);
281                         }
282                 return((ASN1_OBJECT *)&(nid_objs[n]));
283                 }
284         else if (added == NULL)
285                 return(NULL);
286         else
287                 {
288                 ad.type=ADDED_NID;
289                 ad.obj= &ob;
290                 ob.nid=n;
291                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
292                 if (adp != NULL)
293                         return(adp->obj);
294                 else
295                         {
296                         OBJerr(OBJ_F_OBJ_NID2OBJ,OBJ_R_UNKNOWN_NID);
297                         return(NULL);
298                         }
299                 }
300         }
301
302 const char *OBJ_nid2sn(int n)
303         {
304         ADDED_OBJ ad,*adp;
305         ASN1_OBJECT ob;
306
307         if ((n >= 0) && (n < NUM_NID))
308                 {
309                 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef))
310                         {
311                         OBJerr(OBJ_F_OBJ_NID2SN,OBJ_R_UNKNOWN_NID);
312                         return(NULL);
313                         }
314                 return(nid_objs[n].sn);
315                 }
316         else if (added == NULL)
317                 return(NULL);
318         else
319                 {
320                 ad.type=ADDED_NID;
321                 ad.obj= &ob;
322                 ob.nid=n;
323                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
324                 if (adp != NULL)
325                         return(adp->obj->sn);
326                 else
327                         {
328                         OBJerr(OBJ_F_OBJ_NID2SN,OBJ_R_UNKNOWN_NID);
329                         return(NULL);
330                         }
331                 }
332         }
333
334 const char *OBJ_nid2ln(int n)
335         {
336         ADDED_OBJ ad,*adp;
337         ASN1_OBJECT ob;
338
339         if ((n >= 0) && (n < NUM_NID))
340                 {
341                 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef))
342                         {
343                         OBJerr(OBJ_F_OBJ_NID2LN,OBJ_R_UNKNOWN_NID);
344                         return(NULL);
345                         }
346                 return(nid_objs[n].ln);
347                 }
348         else if (added == NULL)
349                 return(NULL);
350         else
351                 {
352                 ad.type=ADDED_NID;
353                 ad.obj= &ob;
354                 ob.nid=n;
355                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
356                 if (adp != NULL)
357                         return(adp->obj->ln);
358                 else
359                         {
360                         OBJerr(OBJ_F_OBJ_NID2LN,OBJ_R_UNKNOWN_NID);
361                         return(NULL);
362                         }
363                 }
364         }
365
366 int OBJ_obj2nid(const ASN1_OBJECT *a)
367         {
368         ASN1_OBJECT **op;
369         ADDED_OBJ ad,*adp;
370
371         if (a == NULL)
372                 return(NID_undef);
373         if (a->nid != 0)
374                 return(a->nid);
375
376         if (added != NULL)
377                 {
378                 ad.type=ADDED_DATA;
379                 ad.obj=(ASN1_OBJECT *)a; /* XXX: ugly but harmless */
380                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
381                 if (adp != NULL) return (adp->obj->nid);
382                 }
383         op=(ASN1_OBJECT **)OBJ_bsearch((char *)&a,(char *)obj_objs,NUM_OBJ,
384                 sizeof(ASN1_OBJECT *),obj_cmp);
385         if (op == NULL)
386                 return(NID_undef);
387         return((*op)->nid);
388         }
389
390 /* Convert an object name into an ASN1_OBJECT
391  * if "noname" is not set then search for short and long names first.
392  * This will convert the "dotted" form into an object: unlike OBJ_txt2nid
393  * it can be used with any objects, not just registered ones.
394  */
395
396 ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
397         {
398         int nid = NID_undef;
399         ASN1_OBJECT *op=NULL;
400         unsigned char *buf,*p;
401         int i, j;
402
403         if(!no_name) {
404                 if( ((nid = OBJ_sn2nid(s)) != NID_undef) ||
405                         ((nid = OBJ_ln2nid(s)) != NID_undef) ) 
406                                         return OBJ_nid2obj(nid);
407         }
408
409         /* Work out size of content octets */
410         i=a2d_ASN1_OBJECT(NULL,0,s,-1);
411         if (i <= 0) {
412                 /* Clear the error */
413                 ERR_get_error();
414                 return NULL;
415         }
416         /* Work out total size */
417         j = ASN1_object_size(0,i,V_ASN1_OBJECT);
418
419         if((buf=(unsigned char *)OPENSSL_malloc(j)) == NULL) return NULL;
420
421         p = buf;
422         /* Write out tag+length */
423         ASN1_put_object(&p,0,i,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
424         /* Write out contents */
425         a2d_ASN1_OBJECT(p,i,s,-1);
426         
427         p=buf;
428         op=d2i_ASN1_OBJECT(NULL,&p,i);
429         OPENSSL_free(buf);
430         return op;
431         }
432
433 int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
434 {
435         int i,idx=0,n=0,len,nid;
436         unsigned long l;
437         unsigned char *p;
438         const char *s;
439         char tbuf[32];
440
441         if (buf_len <= 0) return(0);
442
443         if ((a == NULL) || (a->data == NULL)) {
444                 buf[0]='\0';
445                 return(0);
446         }
447
448         nid=OBJ_obj2nid(a);
449         if ((nid == NID_undef) || no_name) {
450                 len=a->length;
451                 p=a->data;
452
453                 idx=0;
454                 l=0;
455                 while (idx < a->length) {
456                         l|=(p[idx]&0x7f);
457                         if (!(p[idx] & 0x80)) break;
458                         l<<=7L;
459                         idx++;
460                 }
461                 idx++;
462                 i=(int)(l/40);
463                 if (i > 2) i=2;
464                 l-=(long)(i*40);
465
466                 sprintf(tbuf,"%d.%lu",i,l);
467                 i=strlen(tbuf);
468                 strncpy(buf,tbuf,buf_len);
469                 buf_len-=i;
470                 buf+=i;
471                 n+=i;
472
473                 l=0;
474                 for (; idx<len; idx++) {
475                         l|=p[idx]&0x7f;
476                         if (!(p[idx] & 0x80)) {
477                                 sprintf(tbuf,".%lu",l);
478                                 i=strlen(tbuf);
479                                 if (buf_len > 0)
480                                         strncpy(buf,tbuf,buf_len);
481                                 buf_len-=i;
482                                 buf+=i;
483                                 n+=i;
484                                 l=0;
485                         }
486                         l<<=7L;
487                 }
488         } else {
489                 s=OBJ_nid2ln(nid);
490                 if (s == NULL)
491                         s=OBJ_nid2sn(nid);
492                 strncpy(buf,s,buf_len);
493                 n=strlen(s);
494         }
495         buf[buf_len-1]='\0';
496         return(n);
497 }
498
499 int OBJ_txt2nid(const char *s)
500 {
501         ASN1_OBJECT *obj;
502         int nid;
503         obj = OBJ_txt2obj(s, 0);
504         nid = OBJ_obj2nid(obj);
505         ASN1_OBJECT_free(obj);
506         return nid;
507 }
508
509 int OBJ_ln2nid(const char *s)
510         {
511         ASN1_OBJECT o,*oo= &o,**op;
512         ADDED_OBJ ad,*adp;
513
514         o.ln=s;
515         if (added != NULL)
516                 {
517                 ad.type=ADDED_LNAME;
518                 ad.obj= &o;
519                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
520                 if (adp != NULL) return (adp->obj->nid);
521                 }
522         op=(ASN1_OBJECT **)OBJ_bsearch((char *)&oo,(char *)ln_objs,NUM_LN,
523                 sizeof(ASN1_OBJECT *),ln_cmp);
524         if (op == NULL) return(NID_undef);
525         return((*op)->nid);
526         }
527
528 int OBJ_sn2nid(const char *s)
529         {
530         ASN1_OBJECT o,*oo= &o,**op;
531         ADDED_OBJ ad,*adp;
532
533         o.sn=s;
534         if (added != NULL)
535                 {
536                 ad.type=ADDED_SNAME;
537                 ad.obj= &o;
538                 adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
539                 if (adp != NULL) return (adp->obj->nid);
540                 }
541         op=(ASN1_OBJECT **)OBJ_bsearch((char *)&oo,(char *)sn_objs,NUM_SN,
542                 sizeof(ASN1_OBJECT *),sn_cmp);
543         if (op == NULL) return(NID_undef);
544         return((*op)->nid);
545         }
546
547 static int obj_cmp(const void *ap, const void *bp)
548         {
549         int j;
550         ASN1_OBJECT *a= *(ASN1_OBJECT **)ap;
551         ASN1_OBJECT *b= *(ASN1_OBJECT **)bp;
552
553         j=(a->length - b->length);
554         if (j) return(j);
555         return(memcmp(a->data,b->data,a->length));
556         }
557
558 const char *OBJ_bsearch(const char *key, const char *base, int num, int size,
559         int (*cmp)(const void *, const void *))
560         {
561         int l,h,i,c;
562         const char *p;
563
564         if (num == 0) return(NULL);
565         l=0;
566         h=num;
567         while (l < h)
568                 {
569                 i=(l+h)/2;
570                 p= &(base[i*size]);
571                 c=(*cmp)(key,p);
572                 if (c < 0)
573                         h=i;
574                 else if (c > 0)
575                         l=i+1;
576                 else
577                         return(p);
578                 }
579 #ifdef CHARSET_EBCDIC
580 /* THIS IS A KLUDGE - Because the *_obj is sorted in ASCII order, and
581  * I don't have perl (yet), we revert to a *LINEAR* search
582  * when the object wasn't found in the binary search.
583  */
584         for (i=0; i<num; ++i) {
585                 p= &(base[i*size]);
586                 if ((*cmp)(key,p) == 0)
587                         return p;
588         }
589 #endif
590         return(NULL);
591         }
592
593 int OBJ_create_objects(BIO *in)
594         {
595         MS_STATIC char buf[512];
596         int i,num=0;
597         char *o,*s,*l=NULL;
598
599         for (;;)
600                 {
601                 s=o=NULL;
602                 i=BIO_gets(in,buf,512);
603                 if (i <= 0) return(num);
604                 buf[i-1]='\0';
605                 if (!isalnum((unsigned char)buf[0])) return(num);
606                 o=s=buf;
607                 while (isdigit((unsigned char)*s) || (*s == '.'))
608                         s++;
609                 if (*s != '\0')
610                         {
611                         *(s++)='\0';
612                         while (isspace((unsigned char)*s))
613                                 s++;
614                         if (*s == '\0')
615                                 s=NULL;
616                         else
617                                 {
618                                 l=s;
619                                 while ((*l != '\0') && !isspace((unsigned char)*l))
620                                         l++;
621                                 if (*l != '\0')
622                                         {
623                                         *(l++)='\0';
624                                         while (isspace((unsigned char)*l))
625                                                 l++;
626                                         if (*l == '\0') l=NULL;
627                                         }
628                                 else
629                                         l=NULL;
630                                 }
631                         }
632                 else
633                         s=NULL;
634                 if ((o == NULL) || (*o == '\0')) return(num);
635                 if (!OBJ_create(o,s,l)) return(num);
636                 num++;
637                 }
638         /* return(num); */
639         }
640
641 int OBJ_create(const char *oid, const char *sn, const char *ln)
642         {
643         int ok=0;
644         ASN1_OBJECT *op=NULL;
645         unsigned char *buf;
646         int i;
647
648         i=a2d_ASN1_OBJECT(NULL,0,oid,-1);
649         if (i <= 0) return(0);
650
651         if ((buf=(unsigned char *)OPENSSL_malloc(i)) == NULL)
652                 {
653                 OBJerr(OBJ_F_OBJ_CREATE,OBJ_R_MALLOC_FAILURE);
654                 return(0);
655                 }
656         i=a2d_ASN1_OBJECT(buf,i,oid,-1);
657         op=(ASN1_OBJECT *)ASN1_OBJECT_create(OBJ_new_nid(1),buf,i,sn,ln);
658         if (op == NULL) 
659                 goto err;
660         ok=OBJ_add_object(op);
661 err:
662         ASN1_OBJECT_free(op);
663         OPENSSL_free(buf);
664         return(ok);
665         }
666