asn1_gen.c revision 296465 
1/* asn1_gen.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2002.
5 */
6/* ====================================================================
7 * Copyright (c) 2002 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include "cryptlib.h"
61#include <openssl/asn1.h>
62#include <openssl/x509v3.h>
63
64#define ASN1_GEN_FLAG           0x10000
65#define ASN1_GEN_FLAG_IMP       (ASN1_GEN_FLAG|1)
66#define ASN1_GEN_FLAG_EXP       (ASN1_GEN_FLAG|2)
67#define ASN1_GEN_FLAG_TAG       (ASN1_GEN_FLAG|3)
68#define ASN1_GEN_FLAG_BITWRAP   (ASN1_GEN_FLAG|4)
69#define ASN1_GEN_FLAG_OCTWRAP   (ASN1_GEN_FLAG|5)
70#define ASN1_GEN_FLAG_SEQWRAP   (ASN1_GEN_FLAG|6)
71#define ASN1_GEN_FLAG_SETWRAP   (ASN1_GEN_FLAG|7)
72#define ASN1_GEN_FLAG_FORMAT    (ASN1_GEN_FLAG|8)
73
74#define ASN1_GEN_STR(str,val)   {str, sizeof(str) - 1, val}
75
76#define ASN1_FLAG_EXP_MAX       20
77
78/* Input formats */
79
80/* ASCII: default */
81#define ASN1_GEN_FORMAT_ASCII   1
82/* UTF8 */
83#define ASN1_GEN_FORMAT_UTF8    2
84/* Hex */
85#define ASN1_GEN_FORMAT_HEX     3
86/* List of bits */
87#define ASN1_GEN_FORMAT_BITLIST 4
88
89struct tag_name_st {
90    const char *strnam;
91    int len;
92    int tag;
93};
94
95typedef struct {
96    int exp_tag;
97    int exp_class;
98    int exp_constructed;
99    int exp_pad;
100    long exp_len;
101} tag_exp_type;
102
103typedef struct {
104    int imp_tag;
105    int imp_class;
106    int utype;
107    int format;
108    const char *str;
109    tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
110    int exp_count;
111} tag_exp_arg;
112
113static int bitstr_cb(const char *elem, int len, void *bitstr);
114static int asn1_cb(const char *elem, int len, void *bitstr);
115static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
116                      int exp_constructed, int exp_pad, int imp_ok);
117static int parse_tagging(const char *vstart, int vlen, int *ptag,
118                         int *pclass);
119static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
120static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
121static int asn1_str2tag(const char *tagstr, int len);
122
123ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
124{
125    X509V3_CTX cnf;
126
127    if (!nconf)
128        return ASN1_generate_v3(str, NULL);
129
130    X509V3_set_nconf(&cnf, nconf);
131    return ASN1_generate_v3(str, &cnf);
132}
133
134ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
135{
136    ASN1_TYPE *ret;
137    tag_exp_arg asn1_tags;
138    tag_exp_type *etmp;
139
140    int i, len;
141
142    unsigned char *orig_der = NULL, *new_der = NULL;
143    const unsigned char *cpy_start;
144    unsigned char *p;
145    const unsigned char *cp;
146    int cpy_len;
147    long hdr_len;
148    int hdr_constructed = 0, hdr_tag, hdr_class;
149    int r;
150
151    asn1_tags.imp_tag = -1;
152    asn1_tags.imp_class = -1;
153    asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
154    asn1_tags.exp_count = 0;
155    if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
156        return NULL;
157
158    if ((asn1_tags.utype == V_ASN1_SEQUENCE)
159        || (asn1_tags.utype == V_ASN1_SET)) {
160        if (!cnf) {
161            ASN1err(ASN1_F_ASN1_GENERATE_V3,
162                    ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
163            return NULL;
164        }
165        ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
166    } else
167        ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
168
169    if (!ret)
170        return NULL;
171
172    /* If no tagging return base type */
173    if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
174        return ret;
175
176    /* Generate the encoding */
177    cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
178    ASN1_TYPE_free(ret);
179    ret = NULL;
180    /* Set point to start copying for modified encoding */
181    cpy_start = orig_der;
182
183    /* Do we need IMPLICIT tagging? */
184    if (asn1_tags.imp_tag != -1) {
185        /* If IMPLICIT we will replace the underlying tag */
186        /* Skip existing tag+len */
187        r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
188                            cpy_len);
189        if (r & 0x80)
190            goto err;
191        /* Update copy length */
192        cpy_len -= cpy_start - orig_der;
193        /*
194         * For IMPLICIT tagging the length should match the original length
195         * and constructed flag should be consistent.
196         */
197        if (r & 0x1) {
198            /* Indefinite length constructed */
199            hdr_constructed = 2;
200            hdr_len = 0;
201        } else
202            /* Just retain constructed flag */
203            hdr_constructed = r & V_ASN1_CONSTRUCTED;
204        /*
205         * Work out new length with IMPLICIT tag: ignore constructed because
206         * it will mess up if indefinite length
207         */
208        len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
209    } else
210        len = cpy_len;
211
212    /* Work out length in any EXPLICIT, starting from end */
213
214    for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
215         i < asn1_tags.exp_count; i++, etmp--) {
216        /* Content length: number of content octets + any padding */
217        len += etmp->exp_pad;
218        etmp->exp_len = len;
219        /* Total object length: length including new header */
220        len = ASN1_object_size(0, len, etmp->exp_tag);
221    }
222
223    /* Allocate buffer for new encoding */
224
225    new_der = OPENSSL_malloc(len);
226    if (!new_der)
227        goto err;
228
229    /* Generate tagged encoding */
230
231    p = new_der;
232
233    /* Output explicit tags first */
234
235    for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
236         i++, etmp++) {
237        ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
238                        etmp->exp_tag, etmp->exp_class);
239        if (etmp->exp_pad)
240            *p++ = 0;
241    }
242
243    /* If IMPLICIT, output tag */
244
245    if (asn1_tags.imp_tag != -1)
246        ASN1_put_object(&p, hdr_constructed, hdr_len,
247                        asn1_tags.imp_tag, asn1_tags.imp_class);
248
249    /* Copy across original encoding */
250    memcpy(p, cpy_start, cpy_len);
251
252    cp = new_der;
253
254    /* Obtain new ASN1_TYPE structure */
255    ret = d2i_ASN1_TYPE(NULL, &cp, len);
256
257 err:
258    if (orig_der)
259        OPENSSL_free(orig_der);
260    if (new_der)
261        OPENSSL_free(new_der);
262
263    return ret;
264
265}
266
267static int asn1_cb(const char *elem, int len, void *bitstr)
268{
269    tag_exp_arg *arg = bitstr;
270    int i;
271    int utype;
272    int vlen = 0;
273    const char *p, *vstart = NULL;
274
275    int tmp_tag, tmp_class;
276
277    for (i = 0, p = elem; i < len; p++, i++) {
278        /* Look for the ':' in name value pairs */
279        if (*p == ':') {
280            vstart = p + 1;
281            vlen = len - (vstart - elem);
282            len = p - elem;
283            break;
284        }
285    }
286
287    utype = asn1_str2tag(elem, len);
288
289    if (utype == -1) {
290        ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
291        ERR_add_error_data(2, "tag=", elem);
292        return -1;
293    }
294
295    /* If this is not a modifier mark end of string and exit */
296    if (!(utype & ASN1_GEN_FLAG)) {
297        arg->utype = utype;
298        arg->str = vstart;
299        /* If no value and not end of string, error */
300        if (!vstart && elem[len]) {
301            ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
302            return -1;
303        }
304        return 0;
305    }
306
307    switch (utype) {
308
309    case ASN1_GEN_FLAG_IMP:
310        /* Check for illegal multiple IMPLICIT tagging */
311        if (arg->imp_tag != -1) {
312            ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
313            return -1;
314        }
315        if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
316            return -1;
317        break;
318
319    case ASN1_GEN_FLAG_EXP:
320
321        if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
322            return -1;
323        if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
324            return -1;
325        break;
326
327    case ASN1_GEN_FLAG_SEQWRAP:
328        if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
329            return -1;
330        break;
331
332    case ASN1_GEN_FLAG_SETWRAP:
333        if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
334            return -1;
335        break;
336
337    case ASN1_GEN_FLAG_BITWRAP:
338        if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
339            return -1;
340        break;
341
342    case ASN1_GEN_FLAG_OCTWRAP:
343        if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
344            return -1;
345        break;
346
347    case ASN1_GEN_FLAG_FORMAT:
348        if (!strncmp(vstart, "ASCII", 5))
349            arg->format = ASN1_GEN_FORMAT_ASCII;
350        else if (!strncmp(vstart, "UTF8", 4))
351            arg->format = ASN1_GEN_FORMAT_UTF8;
352        else if (!strncmp(vstart, "HEX", 3))
353            arg->format = ASN1_GEN_FORMAT_HEX;
354        else if (!strncmp(vstart, "BITLIST", 3))
355            arg->format = ASN1_GEN_FORMAT_BITLIST;
356        else {
357            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
358            return -1;
359        }
360        break;
361
362    }
363
364    return 1;
365
366}
367
368static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
369{
370    char erch[2];
371    long tag_num;
372    char *eptr;
373    if (!vstart)
374        return 0;
375    tag_num = strtoul(vstart, &eptr, 10);
376    /* Check we haven't gone past max length: should be impossible */
377    if (eptr && *eptr && (eptr > vstart + vlen))
378        return 0;
379    if (tag_num < 0) {
380        ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
381        return 0;
382    }
383    *ptag = tag_num;
384    /* If we have non numeric characters, parse them */
385    if (eptr)
386        vlen -= eptr - vstart;
387    else
388        vlen = 0;
389    if (vlen) {
390        switch (*eptr) {
391
392        case 'U':
393            *pclass = V_ASN1_UNIVERSAL;
394            break;
395
396        case 'A':
397            *pclass = V_ASN1_APPLICATION;
398            break;
399
400        case 'P':
401            *pclass = V_ASN1_PRIVATE;
402            break;
403
404        case 'C':
405            *pclass = V_ASN1_CONTEXT_SPECIFIC;
406            break;
407
408        default:
409            erch[0] = *eptr;
410            erch[1] = 0;
411            ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
412            ERR_add_error_data(2, "Char=", erch);
413            return 0;
414            break;
415
416        }
417    } else
418        *pclass = V_ASN1_CONTEXT_SPECIFIC;
419
420    return 1;
421
422}
423
424/* Handle multiple types: SET and SEQUENCE */
425
426static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
427{
428    ASN1_TYPE *ret = NULL, *typ = NULL;
429    STACK_OF(ASN1_TYPE) *sk = NULL;
430    STACK_OF(CONF_VALUE) *sect = NULL;
431    unsigned char *der = NULL, *p;
432    int derlen;
433    int i, is_set;
434    sk = sk_ASN1_TYPE_new_null();
435    if (!sk)
436        goto bad;
437    if (section) {
438        if (!cnf)
439            goto bad;
440        sect = X509V3_get_section(cnf, (char *)section);
441        if (!sect)
442            goto bad;
443        for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
444            typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
445            if (!typ)
446                goto bad;
447            if (!sk_ASN1_TYPE_push(sk, typ))
448                goto bad;
449            typ = NULL;
450        }
451    }
452
453    /*
454     * Now we has a STACK of the components, convert to the correct form
455     */
456
457    if (utype == V_ASN1_SET)
458        is_set = 1;
459    else
460        is_set = 0;
461
462    derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
463                                       V_ASN1_UNIVERSAL, is_set);
464    der = OPENSSL_malloc(derlen);
465    if (!der)
466        goto bad;
467    p = der;
468    i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
469                              V_ASN1_UNIVERSAL, is_set);
470
471    if (!(ret = ASN1_TYPE_new()))
472        goto bad;
473
474    if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
475        goto bad;
476
477    ret->type = utype;
478
479    ret->value.asn1_string->data = der;
480    ret->value.asn1_string->length = derlen;
481
482    der = NULL;
483
484 bad:
485
486    if (der)
487        OPENSSL_free(der);
488
489    if (sk)
490        sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
491    if (typ)
492        ASN1_TYPE_free(typ);
493    if (sect)
494        X509V3_section_free(cnf, sect);
495
496    return ret;
497}
498
499static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
500                      int exp_constructed, int exp_pad, int imp_ok)
501{
502    tag_exp_type *exp_tmp;
503    /* Can only have IMPLICIT if permitted */
504    if ((arg->imp_tag != -1) && !imp_ok) {
505        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
506        return 0;
507    }
508
509    if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
510        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
511        return 0;
512    }
513
514    exp_tmp = &arg->exp_list[arg->exp_count++];
515
516    /*
517     * If IMPLICIT set tag to implicit value then reset implicit tag since it
518     * has been used.
519     */
520    if (arg->imp_tag != -1) {
521        exp_tmp->exp_tag = arg->imp_tag;
522        exp_tmp->exp_class = arg->imp_class;
523        arg->imp_tag = -1;
524        arg->imp_class = -1;
525    } else {
526        exp_tmp->exp_tag = exp_tag;
527        exp_tmp->exp_class = exp_class;
528    }
529    exp_tmp->exp_constructed = exp_constructed;
530    exp_tmp->exp_pad = exp_pad;
531
532    return 1;
533}
534
535static int asn1_str2tag(const char *tagstr, int len)
536{
537    unsigned int i;
538    static struct tag_name_st *tntmp, tnst[] = {
539        ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
540        ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
541        ASN1_GEN_STR("NULL", V_ASN1_NULL),
542        ASN1_GEN_STR("INT", V_ASN1_INTEGER),
543        ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
544        ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
545        ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
546        ASN1_GEN_STR("OID", V_ASN1_OBJECT),
547        ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
548        ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
549        ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
550        ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
551        ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
552        ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
553        ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
554        ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
555        ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
556        ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
557        ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
558        ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
559        ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
560        ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
561        ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
562        ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
563        ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
564        ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
565        ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
566        ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
567        ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
568        ASN1_GEN_STR("T61", V_ASN1_T61STRING),
569        ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
570        ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
571        ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
572        ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
573
574        /* Special cases */
575        ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
576        ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
577        ASN1_GEN_STR("SET", V_ASN1_SET),
578        /* type modifiers */
579        /* Explicit tag */
580        ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
581        ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
582        /* Implicit tag */
583        ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
584        ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
585        /* OCTET STRING wrapper */
586        ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
587        /* SEQUENCE wrapper */
588        ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
589        /* SET wrapper */
590        ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
591        /* BIT STRING wrapper */
592        ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
593        ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
594        ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
595    };
596
597    if (len == -1)
598        len = strlen(tagstr);
599
600    tntmp = tnst;
601    for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
602        if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
603            return tntmp->tag;
604    }
605
606    return -1;
607}
608
609static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
610{
611    ASN1_TYPE *atmp = NULL;
612
613    CONF_VALUE vtmp;
614
615    unsigned char *rdata;
616    long rdlen;
617
618    int no_unused = 1;
619
620    if (!(atmp = ASN1_TYPE_new())) {
621        ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
622        return NULL;
623    }
624
625    if (!str)
626        str = "";
627
628    switch (utype) {
629
630    case V_ASN1_NULL:
631        if (str && *str) {
632            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
633            goto bad_form;
634        }
635        break;
636
637    case V_ASN1_BOOLEAN:
638        if (format != ASN1_GEN_FORMAT_ASCII) {
639            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
640            goto bad_form;
641        }
642        vtmp.name = NULL;
643        vtmp.section = NULL;
644        vtmp.value = (char *)str;
645        if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
646            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
647            goto bad_str;
648        }
649        break;
650
651    case V_ASN1_INTEGER:
652    case V_ASN1_ENUMERATED:
653        if (format != ASN1_GEN_FORMAT_ASCII) {
654            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
655            goto bad_form;
656        }
657        if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
658            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
659            goto bad_str;
660        }
661        break;
662
663    case V_ASN1_OBJECT:
664        if (format != ASN1_GEN_FORMAT_ASCII) {
665            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
666            goto bad_form;
667        }
668        if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
669            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
670            goto bad_str;
671        }
672        break;
673
674    case V_ASN1_UTCTIME:
675    case V_ASN1_GENERALIZEDTIME:
676        if (format != ASN1_GEN_FORMAT_ASCII) {
677            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
678            goto bad_form;
679        }
680        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
681            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
682            goto bad_str;
683        }
684        if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
685            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
686            goto bad_str;
687        }
688        atmp->value.asn1_string->type = utype;
689        if (!ASN1_TIME_check(atmp->value.asn1_string)) {
690            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
691            goto bad_str;
692        }
693
694        break;
695
696    case V_ASN1_BMPSTRING:
697    case V_ASN1_PRINTABLESTRING:
698    case V_ASN1_IA5STRING:
699    case V_ASN1_T61STRING:
700    case V_ASN1_UTF8STRING:
701    case V_ASN1_VISIBLESTRING:
702    case V_ASN1_UNIVERSALSTRING:
703    case V_ASN1_GENERALSTRING:
704
705        if (format == ASN1_GEN_FORMAT_ASCII)
706            format = MBSTRING_ASC;
707        else if (format == ASN1_GEN_FORMAT_UTF8)
708            format = MBSTRING_UTF8;
709        else {
710            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
711            goto bad_form;
712        }
713
714        if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
715                               -1, format, ASN1_tag2bit(utype)) <= 0) {
716            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
717            goto bad_str;
718        }
719
720        break;
721
722    case V_ASN1_BIT_STRING:
723
724    case V_ASN1_OCTET_STRING:
725
726        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
727            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
728            goto bad_form;
729        }
730
731        if (format == ASN1_GEN_FORMAT_HEX) {
732
733            if (!(rdata = string_to_hex((char *)str, &rdlen))) {
734                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
735                goto bad_str;
736            }
737
738            atmp->value.asn1_string->data = rdata;
739            atmp->value.asn1_string->length = rdlen;
740            atmp->value.asn1_string->type = utype;
741
742        } else if (format == ASN1_GEN_FORMAT_ASCII)
743            ASN1_STRING_set(atmp->value.asn1_string, str, -1);
744        else if ((format == ASN1_GEN_FORMAT_BITLIST)
745                 && (utype == V_ASN1_BIT_STRING)) {
746            if (!CONF_parse_list
747                (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
748                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
749                goto bad_str;
750            }
751            no_unused = 0;
752
753        } else {
754            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
755            goto bad_form;
756        }
757
758        if ((utype == V_ASN1_BIT_STRING) && no_unused) {
759            atmp->value.asn1_string->flags
760                &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
761            atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
762        }
763
764        break;
765
766    default:
767        ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
768        goto bad_str;
769        break;
770    }
771
772    atmp->type = utype;
773    return atmp;
774
775 bad_str:
776    ERR_add_error_data(2, "string=", str);
777 bad_form:
778
779    ASN1_TYPE_free(atmp);
780    return NULL;
781
782}
783
784static int bitstr_cb(const char *elem, int len, void *bitstr)
785{
786    long bitnum;
787    char *eptr;
788    if (!elem)
789        return 0;
790    bitnum = strtoul(elem, &eptr, 10);
791    if (eptr && *eptr && (eptr != elem + len))
792        return 0;
793    if (bitnum < 0) {
794        ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
795        return 0;
796    }
797    if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
798        ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
799        return 0;
800    }
801    return 1;
802}
803