asn1_gen.c revision 280304 
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        if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
247            && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
248                || asn1_tags.imp_tag == V_ASN1_SET))
249            hdr_constructed = V_ASN1_CONSTRUCTED;
250        ASN1_put_object(&p, hdr_constructed, hdr_len,
251                        asn1_tags.imp_tag, asn1_tags.imp_class);
252    }
253
254    /* Copy across original encoding */
255    memcpy(p, cpy_start, cpy_len);
256
257    cp = new_der;
258
259    /* Obtain new ASN1_TYPE structure */
260    ret = d2i_ASN1_TYPE(NULL, &cp, len);
261
262 err:
263    if (orig_der)
264        OPENSSL_free(orig_der);
265    if (new_der)
266        OPENSSL_free(new_der);
267
268    return ret;
269
270}
271
272static int asn1_cb(const char *elem, int len, void *bitstr)
273{
274    tag_exp_arg *arg = bitstr;
275    int i;
276    int utype;
277    int vlen = 0;
278    const char *p, *vstart = NULL;
279
280    int tmp_tag, tmp_class;
281
282    if (elem == NULL)
283        return 0;
284
285    for (i = 0, p = elem; i < len; p++, i++) {
286        /* Look for the ':' in name value pairs */
287        if (*p == ':') {
288            vstart = p + 1;
289            vlen = len - (vstart - elem);
290            len = p - elem;
291            break;
292        }
293    }
294
295    utype = asn1_str2tag(elem, len);
296
297    if (utype == -1) {
298        ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
299        ERR_add_error_data(2, "tag=", elem);
300        return -1;
301    }
302
303    /* If this is not a modifier mark end of string and exit */
304    if (!(utype & ASN1_GEN_FLAG)) {
305        arg->utype = utype;
306        arg->str = vstart;
307        /* If no value and not end of string, error */
308        if (!vstart && elem[len]) {
309            ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
310            return -1;
311        }
312        return 0;
313    }
314
315    switch (utype) {
316
317    case ASN1_GEN_FLAG_IMP:
318        /* Check for illegal multiple IMPLICIT tagging */
319        if (arg->imp_tag != -1) {
320            ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
321            return -1;
322        }
323        if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
324            return -1;
325        break;
326
327    case ASN1_GEN_FLAG_EXP:
328
329        if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
330            return -1;
331        if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
332            return -1;
333        break;
334
335    case ASN1_GEN_FLAG_SEQWRAP:
336        if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
337            return -1;
338        break;
339
340    case ASN1_GEN_FLAG_SETWRAP:
341        if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
342            return -1;
343        break;
344
345    case ASN1_GEN_FLAG_BITWRAP:
346        if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
347            return -1;
348        break;
349
350    case ASN1_GEN_FLAG_OCTWRAP:
351        if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
352            return -1;
353        break;
354
355    case ASN1_GEN_FLAG_FORMAT:
356        if(!vstart) {
357            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);
358            return -1;
359        }
360        if (!strncmp(vstart, "ASCII", 5))
361            arg->format = ASN1_GEN_FORMAT_ASCII;
362        else if (!strncmp(vstart, "UTF8", 4))
363            arg->format = ASN1_GEN_FORMAT_UTF8;
364        else if (!strncmp(vstart, "HEX", 3))
365            arg->format = ASN1_GEN_FORMAT_HEX;
366        else if (!strncmp(vstart, "BITLIST", 7))
367            arg->format = ASN1_GEN_FORMAT_BITLIST;
368        else {
369            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
370            return -1;
371        }
372        break;
373
374    }
375
376    return 1;
377
378}
379
380static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
381{
382    char erch[2];
383    long tag_num;
384    char *eptr;
385    if (!vstart)
386        return 0;
387    tag_num = strtoul(vstart, &eptr, 10);
388    /* Check we haven't gone past max length: should be impossible */
389    if (eptr && *eptr && (eptr > vstart + vlen))
390        return 0;
391    if (tag_num < 0) {
392        ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
393        return 0;
394    }
395    *ptag = tag_num;
396    /* If we have non numeric characters, parse them */
397    if (eptr)
398        vlen -= eptr - vstart;
399    else
400        vlen = 0;
401    if (vlen) {
402        switch (*eptr) {
403
404        case 'U':
405            *pclass = V_ASN1_UNIVERSAL;
406            break;
407
408        case 'A':
409            *pclass = V_ASN1_APPLICATION;
410            break;
411
412        case 'P':
413            *pclass = V_ASN1_PRIVATE;
414            break;
415
416        case 'C':
417            *pclass = V_ASN1_CONTEXT_SPECIFIC;
418            break;
419
420        default:
421            erch[0] = *eptr;
422            erch[1] = 0;
423            ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
424            ERR_add_error_data(2, "Char=", erch);
425            return 0;
426            break;
427
428        }
429    } else
430        *pclass = V_ASN1_CONTEXT_SPECIFIC;
431
432    return 1;
433
434}
435
436/* Handle multiple types: SET and SEQUENCE */
437
438static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
439{
440    ASN1_TYPE *ret = NULL;
441    STACK_OF(ASN1_TYPE) *sk = NULL;
442    STACK_OF(CONF_VALUE) *sect = NULL;
443    unsigned char *der = NULL;
444    int derlen;
445    int i;
446    sk = sk_ASN1_TYPE_new_null();
447    if (!sk)
448        goto bad;
449    if (section) {
450        if (!cnf)
451            goto bad;
452        sect = X509V3_get_section(cnf, (char *)section);
453        if (!sect)
454            goto bad;
455        for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
456            ASN1_TYPE *typ =
457                ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
458            if (!typ)
459                goto bad;
460            if (!sk_ASN1_TYPE_push(sk, typ))
461                goto bad;
462        }
463    }
464
465    /*
466     * Now we has a STACK of the components, convert to the correct form
467     */
468
469    if (utype == V_ASN1_SET)
470        derlen = i2d_ASN1_SET_ANY(sk, &der);
471    else
472        derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
473
474    if (derlen < 0)
475        goto bad;
476
477    if (!(ret = ASN1_TYPE_new()))
478        goto bad;
479
480    if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
481        goto bad;
482
483    ret->type = utype;
484
485    ret->value.asn1_string->data = der;
486    ret->value.asn1_string->length = derlen;
487
488    der = NULL;
489
490 bad:
491
492    if (der)
493        OPENSSL_free(der);
494
495    if (sk)
496        sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
497    if (sect)
498        X509V3_section_free(cnf, sect);
499
500    return ret;
501}
502
503static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
504                      int exp_constructed, int exp_pad, int imp_ok)
505{
506    tag_exp_type *exp_tmp;
507    /* Can only have IMPLICIT if permitted */
508    if ((arg->imp_tag != -1) && !imp_ok) {
509        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
510        return 0;
511    }
512
513    if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
514        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
515        return 0;
516    }
517
518    exp_tmp = &arg->exp_list[arg->exp_count++];
519
520    /*
521     * If IMPLICIT set tag to implicit value then reset implicit tag since it
522     * has been used.
523     */
524    if (arg->imp_tag != -1) {
525        exp_tmp->exp_tag = arg->imp_tag;
526        exp_tmp->exp_class = arg->imp_class;
527        arg->imp_tag = -1;
528        arg->imp_class = -1;
529    } else {
530        exp_tmp->exp_tag = exp_tag;
531        exp_tmp->exp_class = exp_class;
532    }
533    exp_tmp->exp_constructed = exp_constructed;
534    exp_tmp->exp_pad = exp_pad;
535
536    return 1;
537}
538
539static int asn1_str2tag(const char *tagstr, int len)
540{
541    unsigned int i;
542    static const struct tag_name_st *tntmp, tnst[] = {
543        ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
544        ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
545        ASN1_GEN_STR("NULL", V_ASN1_NULL),
546        ASN1_GEN_STR("INT", V_ASN1_INTEGER),
547        ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
548        ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
549        ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
550        ASN1_GEN_STR("OID", V_ASN1_OBJECT),
551        ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
552        ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
553        ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
554        ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
555        ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
556        ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
557        ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
558        ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
559        ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
560        ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
561        ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
562        ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
563        ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
564        ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
565        ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
566        ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
567        ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
568        ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
569        ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
570        ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
571        ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
572        ASN1_GEN_STR("T61", V_ASN1_T61STRING),
573        ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
574        ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
575        ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
576        ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
577        ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
578        ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
579
580        /* Special cases */
581        ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
582        ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
583        ASN1_GEN_STR("SET", V_ASN1_SET),
584        /* type modifiers */
585        /* Explicit tag */
586        ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
587        ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
588        /* Implicit tag */
589        ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
590        ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
591        /* OCTET STRING wrapper */
592        ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
593        /* SEQUENCE wrapper */
594        ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
595        /* SET wrapper */
596        ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
597        /* BIT STRING wrapper */
598        ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
599        ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
600        ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
601    };
602
603    if (len == -1)
604        len = strlen(tagstr);
605
606    tntmp = tnst;
607    for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
608        if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
609            return tntmp->tag;
610    }
611
612    return -1;
613}
614
615static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
616{
617    ASN1_TYPE *atmp = NULL;
618
619    CONF_VALUE vtmp;
620
621    unsigned char *rdata;
622    long rdlen;
623
624    int no_unused = 1;
625
626    if (!(atmp = ASN1_TYPE_new())) {
627        ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
628        return NULL;
629    }
630
631    if (!str)
632        str = "";
633
634    switch (utype) {
635
636    case V_ASN1_NULL:
637        if (str && *str) {
638            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
639            goto bad_form;
640        }
641        break;
642
643    case V_ASN1_BOOLEAN:
644        if (format != ASN1_GEN_FORMAT_ASCII) {
645            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
646            goto bad_form;
647        }
648        vtmp.name = NULL;
649        vtmp.section = NULL;
650        vtmp.value = (char *)str;
651        if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
652            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
653            goto bad_str;
654        }
655        break;
656
657    case V_ASN1_INTEGER:
658    case V_ASN1_ENUMERATED:
659        if (format != ASN1_GEN_FORMAT_ASCII) {
660            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
661            goto bad_form;
662        }
663        if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
664            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
665            goto bad_str;
666        }
667        break;
668
669    case V_ASN1_OBJECT:
670        if (format != ASN1_GEN_FORMAT_ASCII) {
671            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
672            goto bad_form;
673        }
674        if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
675            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
676            goto bad_str;
677        }
678        break;
679
680    case V_ASN1_UTCTIME:
681    case V_ASN1_GENERALIZEDTIME:
682        if (format != ASN1_GEN_FORMAT_ASCII) {
683            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
684            goto bad_form;
685        }
686        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
687            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
688            goto bad_str;
689        }
690        if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
691            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
692            goto bad_str;
693        }
694        atmp->value.asn1_string->type = utype;
695        if (!ASN1_TIME_check(atmp->value.asn1_string)) {
696            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
697            goto bad_str;
698        }
699
700        break;
701
702    case V_ASN1_BMPSTRING:
703    case V_ASN1_PRINTABLESTRING:
704    case V_ASN1_IA5STRING:
705    case V_ASN1_T61STRING:
706    case V_ASN1_UTF8STRING:
707    case V_ASN1_VISIBLESTRING:
708    case V_ASN1_UNIVERSALSTRING:
709    case V_ASN1_GENERALSTRING:
710    case V_ASN1_NUMERICSTRING:
711
712        if (format == ASN1_GEN_FORMAT_ASCII)
713            format = MBSTRING_ASC;
714        else if (format == ASN1_GEN_FORMAT_UTF8)
715            format = MBSTRING_UTF8;
716        else {
717            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
718            goto bad_form;
719        }
720
721        if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
722                               -1, format, ASN1_tag2bit(utype)) <= 0) {
723            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
724            goto bad_str;
725        }
726
727        break;
728
729    case V_ASN1_BIT_STRING:
730
731    case V_ASN1_OCTET_STRING:
732
733        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
734            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
735            goto bad_form;
736        }
737
738        if (format == ASN1_GEN_FORMAT_HEX) {
739
740            if (!(rdata = string_to_hex((char *)str, &rdlen))) {
741                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
742                goto bad_str;
743            }
744
745            atmp->value.asn1_string->data = rdata;
746            atmp->value.asn1_string->length = rdlen;
747            atmp->value.asn1_string->type = utype;
748
749        } else if (format == ASN1_GEN_FORMAT_ASCII)
750            ASN1_STRING_set(atmp->value.asn1_string, str, -1);
751        else if ((format == ASN1_GEN_FORMAT_BITLIST)
752                 && (utype == V_ASN1_BIT_STRING)) {
753            if (!CONF_parse_list
754                (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
755                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
756                goto bad_str;
757            }
758            no_unused = 0;
759
760        } else {
761            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
762            goto bad_form;
763        }
764
765        if ((utype == V_ASN1_BIT_STRING) && no_unused) {
766            atmp->value.asn1_string->flags
767                &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
768            atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
769        }
770
771        break;
772
773    default:
774        ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
775        goto bad_str;
776        break;
777    }
778
779    atmp->type = utype;
780    return atmp;
781
782 bad_str:
783    ERR_add_error_data(2, "string=", str);
784 bad_form:
785
786    ASN1_TYPE_free(atmp);
787    return NULL;
788
789}
790
791static int bitstr_cb(const char *elem, int len, void *bitstr)
792{
793    long bitnum;
794    char *eptr;
795    if (!elem)
796        return 0;
797    bitnum = strtoul(elem, &eptr, 10);
798    if (eptr && *eptr && (eptr != elem + len))
799        return 0;
800    if (bitnum < 0) {
801        ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
802        return 0;
803    }
804    if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
805        ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
806        return 0;
807    }
808    return 1;
809}
810