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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/x509.h>
58 
59 #include <string.h>
60 
61 #include <openssl/asn1.h>
62 #include <openssl/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/obj.h>
65 #include <openssl/x509v3.h>
66 
67 #include "../internal.h"
68 #include "../x509v3/internal.h"
69 
70 /*
71  * Although this file is in crypto/x509 for layering purposes, it emits
72  * errors from the ASN.1 module for OpenSSL compatibility.
73  */
74 
75 #define ASN1_GEN_FLAG           0x10000
76 #define ASN1_GEN_FLAG_IMP       (ASN1_GEN_FLAG|1)
77 #define ASN1_GEN_FLAG_EXP       (ASN1_GEN_FLAG|2)
78 #define ASN1_GEN_FLAG_TAG       (ASN1_GEN_FLAG|3)
79 #define ASN1_GEN_FLAG_BITWRAP   (ASN1_GEN_FLAG|4)
80 #define ASN1_GEN_FLAG_OCTWRAP   (ASN1_GEN_FLAG|5)
81 #define ASN1_GEN_FLAG_SEQWRAP   (ASN1_GEN_FLAG|6)
82 #define ASN1_GEN_FLAG_SETWRAP   (ASN1_GEN_FLAG|7)
83 #define ASN1_GEN_FLAG_FORMAT    (ASN1_GEN_FLAG|8)
84 
85 #define ASN1_GEN_STR(str,val)   {str, sizeof(str) - 1, val}
86 
87 #define ASN1_FLAG_EXP_MAX       20
88 /* Maximum number of nested sequences */
89 #define ASN1_GEN_SEQ_MAX_DEPTH  50
90 
91 /* Input formats */
92 
93 /* ASCII: default */
94 #define ASN1_GEN_FORMAT_ASCII   1
95 /* UTF8 */
96 #define ASN1_GEN_FORMAT_UTF8    2
97 /* Hex */
98 #define ASN1_GEN_FORMAT_HEX     3
99 /* List of bits */
100 #define ASN1_GEN_FORMAT_BITLIST 4
101 
102 struct tag_name_st {
103     const char *strnam;
104     int len;
105     int tag;
106 };
107 
108 typedef struct {
109     int exp_tag;
110     int exp_class;
111     int exp_constructed;
112     int exp_pad;
113     long exp_len;
114 } tag_exp_type;
115 
116 typedef struct {
117     int imp_tag;
118     int imp_class;
119     int utype;
120     int format;
121     const char *str;
122     tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
123     int exp_count;
124 } tag_exp_arg;
125 
126 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
127                               int *perr);
128 static int bitstr_cb(const char *elem, int len, void *bitstr);
129 static int asn1_cb(const char *elem, int len, void *bitstr);
130 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
131                       int exp_constructed, int exp_pad, int imp_ok);
132 static int parse_tagging(const char *vstart, int vlen, int *ptag,
133                          int *pclass);
134 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
135                              int depth, int *perr);
136 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
137 static int asn1_str2tag(const char *tagstr, int len);
138 
ASN1_generate_nconf(char * str,CONF * nconf)139 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
140 {
141     X509V3_CTX cnf;
142 
143     if (!nconf)
144         return ASN1_generate_v3(str, NULL);
145 
146     X509V3_set_nconf(&cnf, nconf);
147     return ASN1_generate_v3(str, &cnf);
148 }
149 
ASN1_generate_v3(char * str,X509V3_CTX * cnf)150 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
151 {
152     int err = 0;
153     ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err);
154     if (err)
155         OPENSSL_PUT_ERROR(ASN1, err);
156     return ret;
157 }
158 
generate_v3(char * str,X509V3_CTX * cnf,int depth,int * perr)159 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
160                               int *perr)
161 {
162     ASN1_TYPE *ret;
163     tag_exp_arg asn1_tags;
164     tag_exp_type *etmp;
165 
166     int i, len;
167 
168     unsigned char *orig_der = NULL, *new_der = NULL;
169     const unsigned char *cpy_start;
170     unsigned char *p;
171     const unsigned char *cp;
172     int cpy_len;
173     long hdr_len = 0;
174     int hdr_constructed = 0, hdr_tag, hdr_class;
175     int r;
176 
177     asn1_tags.imp_tag = -1;
178     asn1_tags.imp_class = -1;
179     asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
180     asn1_tags.exp_count = 0;
181     if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {
182         *perr = ASN1_R_UNKNOWN_TAG;
183         return NULL;
184     }
185 
186     if ((asn1_tags.utype == V_ASN1_SEQUENCE)
187         || (asn1_tags.utype == V_ASN1_SET)) {
188         if (!cnf) {
189             *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG;
190             return NULL;
191         }
192         if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) {
193             *perr = ASN1_R_ILLEGAL_NESTED_TAGGING;
194             return NULL;
195         }
196         ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr);
197     } else
198         ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
199 
200     if (!ret)
201         return NULL;
202 
203     /* If no tagging return base type */
204     if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
205         return ret;
206 
207     /* Generate the encoding */
208     cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
209     ASN1_TYPE_free(ret);
210     ret = NULL;
211     /* Set point to start copying for modified encoding */
212     cpy_start = orig_der;
213 
214     /* Do we need IMPLICIT tagging? */
215     if (asn1_tags.imp_tag != -1) {
216         /* If IMPLICIT we will replace the underlying tag */
217         /* Skip existing tag+len */
218         r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
219                             cpy_len);
220         if (r & 0x80)
221             goto err;
222         /* Update copy length */
223         cpy_len -= cpy_start - orig_der;
224         /*
225          * For IMPLICIT tagging the length should match the original length
226          * and constructed flag should be consistent.
227          */
228         if (r & 0x1) {
229             /* Indefinite length constructed */
230             hdr_constructed = 2;
231             hdr_len = 0;
232         } else
233             /* Just retain constructed flag */
234             hdr_constructed = r & V_ASN1_CONSTRUCTED;
235         /*
236          * Work out new length with IMPLICIT tag: ignore constructed because
237          * it will mess up if indefinite length
238          */
239         len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
240     } else
241         len = cpy_len;
242 
243     /* Work out length in any EXPLICIT, starting from end */
244 
245     for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
246          i < asn1_tags.exp_count; i++, etmp--) {
247         /* Content length: number of content octets + any padding */
248         len += etmp->exp_pad;
249         etmp->exp_len = len;
250         /* Total object length: length including new header */
251         len = ASN1_object_size(0, len, etmp->exp_tag);
252     }
253 
254     /* Allocate buffer for new encoding */
255 
256     new_der = OPENSSL_malloc(len);
257     if (!new_der)
258         goto err;
259 
260     /* Generate tagged encoding */
261 
262     p = new_der;
263 
264     /* Output explicit tags first */
265 
266     for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
267          i++, etmp++) {
268         ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
269                         etmp->exp_tag, etmp->exp_class);
270         if (etmp->exp_pad)
271             *p++ = 0;
272     }
273 
274     /* If IMPLICIT, output tag */
275 
276     if (asn1_tags.imp_tag != -1) {
277         if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
278             && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
279                 || asn1_tags.imp_tag == V_ASN1_SET))
280             hdr_constructed = V_ASN1_CONSTRUCTED;
281         ASN1_put_object(&p, hdr_constructed, hdr_len,
282                         asn1_tags.imp_tag, asn1_tags.imp_class);
283     }
284 
285     /* Copy across original encoding */
286     OPENSSL_memcpy(p, cpy_start, cpy_len);
287 
288     cp = new_der;
289 
290     /* Obtain new ASN1_TYPE structure */
291     ret = d2i_ASN1_TYPE(NULL, &cp, len);
292 
293  err:
294     if (orig_der)
295         OPENSSL_free(orig_der);
296     if (new_der)
297         OPENSSL_free(new_der);
298 
299     return ret;
300 
301 }
302 
asn1_cb(const char * elem,int len,void * bitstr)303 static int asn1_cb(const char *elem, int len, void *bitstr)
304 {
305     tag_exp_arg *arg = bitstr;
306     int i;
307     int utype;
308     int vlen = 0;
309     const char *p, *vstart = NULL;
310 
311     int tmp_tag, tmp_class;
312 
313     if (elem == NULL)
314         return -1;
315 
316     for (i = 0, p = elem; i < len; p++, i++) {
317         /* Look for the ':' in name value pairs */
318         if (*p == ':') {
319             vstart = p + 1;
320             vlen = len - (vstart - elem);
321             len = p - elem;
322             break;
323         }
324     }
325 
326     utype = asn1_str2tag(elem, len);
327 
328     if (utype == -1) {
329         OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_TAG);
330         ERR_add_error_data(2, "tag=", elem);
331         return -1;
332     }
333 
334     /* If this is not a modifier mark end of string and exit */
335     if (!(utype & ASN1_GEN_FLAG)) {
336         arg->utype = utype;
337         arg->str = vstart;
338         /* If no value and not end of string, error */
339         if (!vstart && elem[len]) {
340             OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_VALUE);
341             return -1;
342         }
343         return 0;
344     }
345 
346     switch (utype) {
347 
348     case ASN1_GEN_FLAG_IMP:
349         /* Check for illegal multiple IMPLICIT tagging */
350         if (arg->imp_tag != -1) {
351             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NESTED_TAGGING);
352             return -1;
353         }
354         if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
355             return -1;
356         break;
357 
358     case ASN1_GEN_FLAG_EXP:
359 
360         if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
361             return -1;
362         if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
363             return -1;
364         break;
365 
366     case ASN1_GEN_FLAG_SEQWRAP:
367         if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
368             return -1;
369         break;
370 
371     case ASN1_GEN_FLAG_SETWRAP:
372         if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
373             return -1;
374         break;
375 
376     case ASN1_GEN_FLAG_BITWRAP:
377         if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
378             return -1;
379         break;
380 
381     case ASN1_GEN_FLAG_OCTWRAP:
382         if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
383             return -1;
384         break;
385 
386     case ASN1_GEN_FLAG_FORMAT:
387         if (!vstart) {
388             OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT);
389             return -1;
390         }
391         if (!strncmp(vstart, "ASCII", 5))
392             arg->format = ASN1_GEN_FORMAT_ASCII;
393         else if (!strncmp(vstart, "UTF8", 4))
394             arg->format = ASN1_GEN_FORMAT_UTF8;
395         else if (!strncmp(vstart, "HEX", 3))
396             arg->format = ASN1_GEN_FORMAT_HEX;
397         else if (!strncmp(vstart, "BITLIST", 7))
398             arg->format = ASN1_GEN_FORMAT_BITLIST;
399         else {
400             OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT);
401             return -1;
402         }
403         break;
404 
405     }
406 
407     return 1;
408 
409 }
410 
parse_tagging(const char * vstart,int vlen,int * ptag,int * pclass)411 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
412 {
413     char erch[2];
414     long tag_num;
415     char *eptr;
416     if (!vstart)
417         return 0;
418     tag_num = strtoul(vstart, &eptr, 10);
419     /* Check we haven't gone past max length: should be impossible */
420     if (eptr && *eptr && (eptr > vstart + vlen))
421         return 0;
422     if (tag_num < 0) {
423         OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER);
424         return 0;
425     }
426     *ptag = tag_num;
427     /* If we have non numeric characters, parse them */
428     if (eptr)
429         vlen -= eptr - vstart;
430     else
431         vlen = 0;
432     if (vlen) {
433         switch (*eptr) {
434 
435         case 'U':
436             *pclass = V_ASN1_UNIVERSAL;
437             break;
438 
439         case 'A':
440             *pclass = V_ASN1_APPLICATION;
441             break;
442 
443         case 'P':
444             *pclass = V_ASN1_PRIVATE;
445             break;
446 
447         case 'C':
448             *pclass = V_ASN1_CONTEXT_SPECIFIC;
449             break;
450 
451         default:
452             erch[0] = *eptr;
453             erch[1] = 0;
454             OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_MODIFIER);
455             ERR_add_error_data(2, "Char=", erch);
456             return 0;
457             break;
458 
459         }
460     } else
461         *pclass = V_ASN1_CONTEXT_SPECIFIC;
462 
463     return 1;
464 
465 }
466 
467 /* Handle multiple types: SET and SEQUENCE */
468 
asn1_multi(int utype,const char * section,X509V3_CTX * cnf,int depth,int * perr)469 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
470                              int depth, int *perr)
471 {
472     ASN1_TYPE *ret = NULL;
473     STACK_OF(ASN1_TYPE) *sk = NULL;
474     STACK_OF(CONF_VALUE) *sect = NULL;
475     unsigned char *der = NULL;
476     int derlen;
477     size_t i;
478     sk = sk_ASN1_TYPE_new_null();
479     if (!sk)
480         goto bad;
481     if (section) {
482         if (!cnf)
483             goto bad;
484         sect = X509V3_get_section(cnf, (char *)section);
485         if (!sect)
486             goto bad;
487         for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
488             ASN1_TYPE *typ =
489                 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,
490                             depth + 1, perr);
491             if (!typ)
492                 goto bad;
493             if (!sk_ASN1_TYPE_push(sk, typ))
494                 goto bad;
495         }
496     }
497 
498     /*
499      * Now we has a STACK of the components, convert to the correct form
500      */
501 
502     if (utype == V_ASN1_SET)
503         derlen = i2d_ASN1_SET_ANY(sk, &der);
504     else
505         derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
506 
507     if (derlen < 0)
508         goto bad;
509 
510     if (!(ret = ASN1_TYPE_new()))
511         goto bad;
512 
513     if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
514         goto bad;
515 
516     ret->type = utype;
517 
518     ret->value.asn1_string->data = der;
519     ret->value.asn1_string->length = derlen;
520 
521     der = NULL;
522 
523  bad:
524 
525     if (der)
526         OPENSSL_free(der);
527 
528     if (sk)
529         sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
530     if (sect)
531         X509V3_section_free(cnf, sect);
532 
533     return ret;
534 }
535 
append_exp(tag_exp_arg * arg,int exp_tag,int exp_class,int exp_constructed,int exp_pad,int imp_ok)536 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
537                       int exp_constructed, int exp_pad, int imp_ok)
538 {
539     tag_exp_type *exp_tmp;
540     /* Can only have IMPLICIT if permitted */
541     if ((arg->imp_tag != -1) && !imp_ok) {
542         OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_IMPLICIT_TAG);
543         return 0;
544     }
545 
546     if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
547         OPENSSL_PUT_ERROR(ASN1, ASN1_R_DEPTH_EXCEEDED);
548         return 0;
549     }
550 
551     exp_tmp = &arg->exp_list[arg->exp_count++];
552 
553     /*
554      * If IMPLICIT set tag to implicit value then reset implicit tag since it
555      * has been used.
556      */
557     if (arg->imp_tag != -1) {
558         exp_tmp->exp_tag = arg->imp_tag;
559         exp_tmp->exp_class = arg->imp_class;
560         arg->imp_tag = -1;
561         arg->imp_class = -1;
562     } else {
563         exp_tmp->exp_tag = exp_tag;
564         exp_tmp->exp_class = exp_class;
565     }
566     exp_tmp->exp_constructed = exp_constructed;
567     exp_tmp->exp_pad = exp_pad;
568 
569     return 1;
570 }
571 
asn1_str2tag(const char * tagstr,int len)572 static int asn1_str2tag(const char *tagstr, int len)
573 {
574     unsigned int i;
575     static const struct tag_name_st *tntmp, tnst[] = {
576         ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
577         ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
578         ASN1_GEN_STR("NULL", V_ASN1_NULL),
579         ASN1_GEN_STR("INT", V_ASN1_INTEGER),
580         ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
581         ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
582         ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
583         ASN1_GEN_STR("OID", V_ASN1_OBJECT),
584         ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
585         ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
586         ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
587         ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
588         ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
589         ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
590         ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
591         ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
592         ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
593         ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
594         ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
595         ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
596         ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
597         ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
598         ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
599         ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
600         ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
601         ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
602         ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
603         ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
604         ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
605         ASN1_GEN_STR("T61", V_ASN1_T61STRING),
606         ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
607         ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
608         ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
609         ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
610         ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
611         ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
612 
613         /* Special cases */
614         ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
615         ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
616         ASN1_GEN_STR("SET", V_ASN1_SET),
617         /* type modifiers */
618         /* Explicit tag */
619         ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
620         ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
621         /* Implicit tag */
622         ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
623         ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
624         /* OCTET STRING wrapper */
625         ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
626         /* SEQUENCE wrapper */
627         ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
628         /* SET wrapper */
629         ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
630         /* BIT STRING wrapper */
631         ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
632         ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
633         ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
634     };
635 
636     if (len == -1)
637         len = strlen(tagstr);
638 
639     tntmp = tnst;
640     for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
641         if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
642             return tntmp->tag;
643     }
644 
645     return -1;
646 }
647 
asn1_str2type(const char * str,int format,int utype)648 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
649 {
650     ASN1_TYPE *atmp = NULL;
651 
652     CONF_VALUE vtmp;
653 
654     unsigned char *rdata;
655     long rdlen;
656 
657     int no_unused = 1;
658 
659     if (!(atmp = ASN1_TYPE_new())) {
660         OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
661         return NULL;
662     }
663 
664     if (!str)
665         str = "";
666 
667     switch (utype) {
668 
669     case V_ASN1_NULL:
670         if (str && *str) {
671             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NULL_VALUE);
672             goto bad_form;
673         }
674         break;
675 
676     case V_ASN1_BOOLEAN:
677         if (format != ASN1_GEN_FORMAT_ASCII) {
678             OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ASCII_FORMAT);
679             goto bad_form;
680         }
681         vtmp.name = NULL;
682         vtmp.section = NULL;
683         vtmp.value = (char *)str;
684         if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
685             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BOOLEAN);
686             goto bad_str;
687         }
688         break;
689 
690     case V_ASN1_INTEGER:
691     case V_ASN1_ENUMERATED:
692         if (format != ASN1_GEN_FORMAT_ASCII) {
693             OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
694             goto bad_form;
695         }
696         if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
697             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_INTEGER);
698             goto bad_str;
699         }
700         break;
701 
702     case V_ASN1_OBJECT:
703         if (format != ASN1_GEN_FORMAT_ASCII) {
704             OPENSSL_PUT_ERROR(ASN1, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
705             goto bad_form;
706         }
707         if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
708             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_OBJECT);
709             goto bad_str;
710         }
711         break;
712 
713     case V_ASN1_UTCTIME:
714     case V_ASN1_GENERALIZEDTIME:
715         if (format != ASN1_GEN_FORMAT_ASCII) {
716             OPENSSL_PUT_ERROR(ASN1, ASN1_R_TIME_NOT_ASCII_FORMAT);
717             goto bad_form;
718         }
719         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
720             OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
721             goto bad_str;
722         }
723         if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
724             OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
725             goto bad_str;
726         }
727         atmp->value.asn1_string->type = utype;
728         if (!ASN1_TIME_check(atmp->value.asn1_string)) {
729             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_TIME_VALUE);
730             goto bad_str;
731         }
732 
733         break;
734 
735     case V_ASN1_BMPSTRING:
736     case V_ASN1_PRINTABLESTRING:
737     case V_ASN1_IA5STRING:
738     case V_ASN1_T61STRING:
739     case V_ASN1_UTF8STRING:
740     case V_ASN1_VISIBLESTRING:
741     case V_ASN1_UNIVERSALSTRING:
742     case V_ASN1_GENERALSTRING:
743     case V_ASN1_NUMERICSTRING:
744 
745         if (format == ASN1_GEN_FORMAT_ASCII)
746             format = MBSTRING_ASC;
747         else if (format == ASN1_GEN_FORMAT_UTF8)
748             format = MBSTRING_UTF8;
749         else {
750             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_FORMAT);
751             goto bad_form;
752         }
753 
754         if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
755                                -1, format, ASN1_tag2bit(utype)) <= 0) {
756             OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
757             goto bad_str;
758         }
759 
760         break;
761 
762     case V_ASN1_BIT_STRING:
763 
764     case V_ASN1_OCTET_STRING:
765 
766         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
767             OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
768             goto bad_form;
769         }
770 
771         if (format == ASN1_GEN_FORMAT_HEX) {
772 
773             if (!(rdata = x509v3_hex_to_bytes((char *)str, &rdlen))) {
774                 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_HEX);
775                 goto bad_str;
776             }
777 
778             atmp->value.asn1_string->data = rdata;
779             atmp->value.asn1_string->length = rdlen;
780             atmp->value.asn1_string->type = utype;
781 
782         } else if (format == ASN1_GEN_FORMAT_ASCII)
783             ASN1_STRING_set(atmp->value.asn1_string, str, -1);
784         else if ((format == ASN1_GEN_FORMAT_BITLIST)
785                  && (utype == V_ASN1_BIT_STRING)) {
786             if (!CONF_parse_list
787                 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
788                 OPENSSL_PUT_ERROR(ASN1, ASN1_R_LIST_ERROR);
789                 goto bad_str;
790             }
791             no_unused = 0;
792 
793         } else {
794             OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
795             goto bad_form;
796         }
797 
798         if ((utype == V_ASN1_BIT_STRING) && no_unused) {
799             atmp->value.asn1_string->flags
800                 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
801             atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
802         }
803 
804         break;
805 
806     default:
807         OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNSUPPORTED_TYPE);
808         goto bad_str;
809         break;
810     }
811 
812     atmp->type = utype;
813     return atmp;
814 
815  bad_str:
816     ERR_add_error_data(2, "string=", str);
817  bad_form:
818 
819     ASN1_TYPE_free(atmp);
820     return NULL;
821 
822 }
823 
bitstr_cb(const char * elem,int len,void * bitstr)824 static int bitstr_cb(const char *elem, int len, void *bitstr)
825 {
826     long bitnum;
827     char *eptr;
828     if (!elem)
829         return 0;
830     bitnum = strtoul(elem, &eptr, 10);
831     if (eptr && *eptr && (eptr != elem + len))
832         return 0;
833     if (bitnum < 0) {
834         OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER);
835         return 0;
836     }
837     if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
838         OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
839         return 0;
840     }
841     return 1;
842 }
843