1 /* v3_utl.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58 /* X509 v3 extension utilities */
59
60
61 #include <stdio.h>
62 #include <ctype.h>
63 #include "cryptlib.h"
64 #include <openssl/conf.h>
65 #include <openssl/x509v3.h>
66 #include <openssl/bn.h>
67
68 static char *strip_spaces(char *name);
69 static int sk_strcmp(const char * const *a, const char * const *b);
70 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens);
71 static void str_free(OPENSSL_STRING str);
72 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
73
74 static int ipv4_from_asc(unsigned char *v4, const char *in);
75 static int ipv6_from_asc(unsigned char *v6, const char *in);
76 static int ipv6_cb(const char *elem, int len, void *usr);
77 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
78
79 /* Add a CONF_VALUE name value pair to stack */
80
81 int X509V3_add_value(const char *name, const char *value,
82 STACK_OF(CONF_VALUE) **extlist)
83 {
84 CONF_VALUE *vtmp = NULL;
85 char *tname = NULL, *tvalue = NULL;
86 if(name && !(tname = BUF_strdup(name))) goto err;
87 if(value && !(tvalue = BUF_strdup(value))) goto err;
88 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
89 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
90 vtmp->section = NULL;
91 vtmp->name = tname;
92 vtmp->value = tvalue;
93 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
94 return 1;
95 err:
96 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
97 if(vtmp) OPENSSL_free(vtmp);
98 if(tname) OPENSSL_free(tname);
99 if(tvalue) OPENSSL_free(tvalue);
100 return 0;
101 }
102
103 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
104 STACK_OF(CONF_VALUE) **extlist)
105 {
106 return X509V3_add_value(name,(const char *)value,extlist);
107 }
108
109 /* Free function for STACK_OF(CONF_VALUE) */
110
111 void X509V3_conf_free(CONF_VALUE *conf)
112 {
113 if(!conf) return;
114 if(conf->name) OPENSSL_free(conf->name);
115 if(conf->value) OPENSSL_free(conf->value);
116 if(conf->section) OPENSSL_free(conf->section);
117 OPENSSL_free(conf);
118 }
119
120 int X509V3_add_value_bool(const char *name, int asn1_bool,
121 STACK_OF(CONF_VALUE) **extlist)
122 {
123 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
124 return X509V3_add_value(name, "FALSE", extlist);
125 }
126
127 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
128 STACK_OF(CONF_VALUE) **extlist)
129 {
130 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
131 return 1;
132 }
133
134
135 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
136 {
137 BIGNUM *bntmp = NULL;
138 char *strtmp = NULL;
139 if(!a) return NULL;
140 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
141 !(strtmp = BN_bn2dec(bntmp)) )
142 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
143 BN_free(bntmp);
144 return strtmp;
145 }
146
147 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
148 {
149 BIGNUM *bntmp = NULL;
150 char *strtmp = NULL;
151 if(!a) return NULL;
152 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
153 !(strtmp = BN_bn2dec(bntmp)) )
154 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
155 BN_free(bntmp);
156 return strtmp;
157 }
158
159 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
160 {
161 BIGNUM *bn = NULL;
162 ASN1_INTEGER *aint;
163 int isneg, ishex;
164 int ret;
165 if (!value) {
166 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
167 return 0;
168 }
169 bn = BN_new();
170 if (value[0] == '-') {
171 value++;
172 isneg = 1;
173 } else isneg = 0;
174
175 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
176 value += 2;
177 ishex = 1;
178 } else ishex = 0;
179
180 if (ishex) ret = BN_hex2bn(&bn, value);
181 else ret = BN_dec2bn(&bn, value);
182
183 if (!ret || value[ret]) {
184 BN_free(bn);
185 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
186 return 0;
187 }
188
189 if (isneg && BN_is_zero(bn)) isneg = 0;
190
191 aint = BN_to_ASN1_INTEGER(bn, NULL);
192 BN_free(bn);
193 if (!aint) {
194 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
195 return 0;
196 }
197 if (isneg) aint->type |= V_ASN1_NEG;
198 return aint;
199 }
200
201 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
202 STACK_OF(CONF_VALUE) **extlist)
203 {
204 char *strtmp;
205 int ret;
206 if(!aint) return 1;
207 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
208 ret = X509V3_add_value(name, strtmp, extlist);
209 OPENSSL_free(strtmp);
210 return ret;
211 }
212
213 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
214 {
215 char *btmp;
216 if(!(btmp = value->value)) goto err;
217 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
218 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
219 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
220 *asn1_bool = 0xff;
221 return 1;
222 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
223 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
224 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
225 *asn1_bool = 0;
226 return 1;
227 }
228 err:
229 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
230 X509V3_conf_err(value);
231 return 0;
232 }
233
234 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
235 {
236 ASN1_INTEGER *itmp;
237 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
238 X509V3_conf_err(value);
239 return 0;
240 }
241 *aint = itmp;
242 return 1;
243 }
244
245 #define HDR_NAME 1
246 #define HDR_VALUE 2
247
248 /*#define DEBUG*/
249
250 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
251 {
252 char *p, *q, c;
253 char *ntmp, *vtmp;
254 STACK_OF(CONF_VALUE) *values = NULL;
255 char *linebuf;
256 int state;
257 /* We are going to modify the line so copy it first */
258 linebuf = BUF_strdup(line);
259 state = HDR_NAME;
260 ntmp = NULL;
261 /* Go through all characters */
262 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
263
264 switch(state) {
265 case HDR_NAME:
266 if(c == ':') {
267 state = HDR_VALUE;
268 *p = 0;
269 ntmp = strip_spaces(q);
270 if(!ntmp) {
271 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
272 goto err;
273 }
274 q = p + 1;
275 } else if(c == ',') {
276 *p = 0;
277 ntmp = strip_spaces(q);
278 q = p + 1;
279 #if 0
280 printf("%s\n", ntmp);
281 #endif
282 if(!ntmp) {
283 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
284 goto err;
285 }
286 X509V3_add_value(ntmp, NULL, &values);
287 }
288 break ;
289
290 case HDR_VALUE:
291 if(c == ',') {
292 state = HDR_NAME;
293 *p = 0;
294 vtmp = strip_spaces(q);
295 #if 0
296 printf("%s\n", ntmp);
297 #endif
298 if(!vtmp) {
299 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
300 goto err;
301 }
302 X509V3_add_value(ntmp, vtmp, &values);
303 ntmp = NULL;
304 q = p + 1;
305 }
306
307 }
308 }
309
310 if(state == HDR_VALUE) {
311 vtmp = strip_spaces(q);
312 #if 0
313 printf("%s=%s\n", ntmp, vtmp);
314 #endif
315 if(!vtmp) {
316 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
317 goto err;
318 }
319 X509V3_add_value(ntmp, vtmp, &values);
320 } else {
321 ntmp = strip_spaces(q);
322 #if 0
323 printf("%s\n", ntmp);
324 #endif
325 if(!ntmp) {
326 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
327 goto err;
328 }
329 X509V3_add_value(ntmp, NULL, &values);
330 }
331 OPENSSL_free(linebuf);
332 return values;
333
334 err:
335 OPENSSL_free(linebuf);
336 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
337 return NULL;
338
339 }
340
341 /* Delete leading and trailing spaces from a string */
342 static char *strip_spaces(char *name)
343 {
344 char *p, *q;
345 /* Skip over leading spaces */
346 p = name;
347 while(*p && isspace((unsigned char)*p)) p++;
348 if(!*p) return NULL;
349 q = p + strlen(p) - 1;
350 while((q != p) && isspace((unsigned char)*q)) q--;
351 if(p != q) q[1] = 0;
352 if(!*p) return NULL;
353 return p;
354 }
355
356 /* hex string utilities */
357
358 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
359 * hex representation
360 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
361 */
362
363 char *hex_to_string(const unsigned char *buffer, long len)
364 {
365 char *tmp, *q;
366 const unsigned char *p;
367 int i;
368 static const char hexdig[] = "0123456789ABCDEF";
369 if(!buffer || !len) return NULL;
370 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
371 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
372 return NULL;
373 }
374 q = tmp;
375 for(i = 0, p = buffer; i < len; i++,p++) {
376 *q++ = hexdig[(*p >> 4) & 0xf];
377 *q++ = hexdig[*p & 0xf];
378 *q++ = ':';
379 }
380 q[-1] = 0;
381 #ifdef CHARSET_EBCDIC
382 ebcdic2ascii(tmp, tmp, q - tmp - 1);
383 #endif
384
385 return tmp;
386 }
387
388 /* Give a string of hex digits convert to
389 * a buffer
390 */
391
392 unsigned char *string_to_hex(const char *str, long *len)
393 {
394 unsigned char *hexbuf, *q;
395 unsigned char ch, cl, *p;
396 if(!str) {
397 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
398 return NULL;
399 }
400 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
401 for(p = (unsigned char *)str, q = hexbuf; *p;) {
402 ch = *p++;
403 #ifdef CHARSET_EBCDIC
404 ch = os_toebcdic[ch];
405 #endif
406 if(ch == ':') continue;
407 cl = *p++;
408 #ifdef CHARSET_EBCDIC
409 cl = os_toebcdic[cl];
410 #endif
411 if(!cl) {
412 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
413 OPENSSL_free(hexbuf);
414 return NULL;
415 }
416 if(isupper(ch)) ch = tolower(ch);
417 if(isupper(cl)) cl = tolower(cl);
418
419 if((ch >= '0') && (ch <= '9')) ch -= '0';
420 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
421 else goto badhex;
422
423 if((cl >= '0') && (cl <= '9')) cl -= '0';
424 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
425 else goto badhex;
426
427 *q++ = (ch << 4) | cl;
428 }
429
430 if(len) *len = q - hexbuf;
431
432 return hexbuf;
433
434 err:
435 if(hexbuf) OPENSSL_free(hexbuf);
436 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
437 return NULL;
438
439 badhex:
440 OPENSSL_free(hexbuf);
441 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
442 return NULL;
443
444 }
445
446 /* V2I name comparison function: returns zero if 'name' matches
447 * cmp or cmp.*
448 */
449
450 int name_cmp(const char *name, const char *cmp)
451 {
452 int len, ret;
453 char c;
454 len = strlen(cmp);
455 if((ret = strncmp(name, cmp, len))) return ret;
456 c = name[len];
457 if(!c || (c=='.')) return 0;
458 return 1;
459 }
460
461 static int sk_strcmp(const char * const *a, const char * const *b)
462 {
463 return strcmp(*a, *b);
464 }
465
466 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
467 {
468 GENERAL_NAMES *gens;
469 STACK_OF(OPENSSL_STRING) *ret;
470
471 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
472 ret = get_email(X509_get_subject_name(x), gens);
473 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
474 return ret;
475 }
476
477 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
478 {
479 AUTHORITY_INFO_ACCESS *info;
480 STACK_OF(OPENSSL_STRING) *ret = NULL;
481 int i;
482
483 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
484 if (!info)
485 return NULL;
486 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++)
487 {
488 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
489 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP)
490 {
491 if (ad->location->type == GEN_URI)
492 {
493 if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier))
494 break;
495 }
496 }
497 }
498 AUTHORITY_INFO_ACCESS_free(info);
499 return ret;
500 }
501
502 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
503 {
504 GENERAL_NAMES *gens;
505 STACK_OF(X509_EXTENSION) *exts;
506 STACK_OF(OPENSSL_STRING) *ret;
507
508 exts = X509_REQ_get_extensions(x);
509 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
510 ret = get_email(X509_REQ_get_subject_name(x), gens);
511 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
512 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
513 return ret;
514 }
515
516
517 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
518 {
519 STACK_OF(OPENSSL_STRING) *ret = NULL;
520 X509_NAME_ENTRY *ne;
521 ASN1_IA5STRING *email;
522 GENERAL_NAME *gen;
523 int i;
524 /* Now add any email address(es) to STACK */
525 i = -1;
526 /* First supplied X509_NAME */
527 while((i = X509_NAME_get_index_by_NID(name,
528 NID_pkcs9_emailAddress, i)) >= 0) {
529 ne = X509_NAME_get_entry(name, i);
530 email = X509_NAME_ENTRY_get_data(ne);
531 if(!append_ia5(&ret, email)) return NULL;
532 }
533 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
534 {
535 gen = sk_GENERAL_NAME_value(gens, i);
536 if(gen->type != GEN_EMAIL) continue;
537 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
538 }
539 return ret;
540 }
541
542 static void str_free(OPENSSL_STRING str)
543 {
544 OPENSSL_free(str);
545 }
546
547 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
548 {
549 char *emtmp;
550 /* First some sanity checks */
551 if(email->type != V_ASN1_IA5STRING) return 1;
552 if(!email->data || !email->length) return 1;
553 if(!*sk) *sk = sk_OPENSSL_STRING_new(sk_strcmp);
554 if(!*sk) return 0;
555 /* Don't add duplicates */
556 if(sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) return 1;
557 emtmp = BUF_strdup((char *)email->data);
558 if(!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
559 X509_email_free(*sk);
560 *sk = NULL;
561 return 0;
562 }
563 return 1;
564 }
565
566 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
567 {
568 sk_OPENSSL_STRING_pop_free(sk, str_free);
569 }
570
571 /* Convert IP addresses both IPv4 and IPv6 into an
572 * OCTET STRING compatible with RFC3280.
573 */
574
575 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
576 {
577 unsigned char ipout[16];
578 ASN1_OCTET_STRING *ret;
579 int iplen;
580
581 /* If string contains a ':' assume IPv6 */
582
583 iplen = a2i_ipadd(ipout, ipasc);
584
585 if (!iplen)
586 return NULL;
587
588 ret = ASN1_OCTET_STRING_new();
589 if (!ret)
590 return NULL;
591 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
592 {
593 ASN1_OCTET_STRING_free(ret);
594 return NULL;
595 }
596 return ret;
597 }
598
599 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
600 {
601 ASN1_OCTET_STRING *ret = NULL;
602 unsigned char ipout[32];
603 char *iptmp = NULL, *p;
604 int iplen1, iplen2;
605 p = strchr(ipasc,'/');
606 if (!p)
607 return NULL;
608 iptmp = BUF_strdup(ipasc);
609 if (!iptmp)
610 return NULL;
611 p = iptmp + (p - ipasc);
612 *p++ = 0;
613
614 iplen1 = a2i_ipadd(ipout, iptmp);
615
616 if (!iplen1)
617 goto err;
618
619 iplen2 = a2i_ipadd(ipout + iplen1, p);
620
621 OPENSSL_free(iptmp);
622 iptmp = NULL;
623
624 if (!iplen2 || (iplen1 != iplen2))
625 goto err;
626
627 ret = ASN1_OCTET_STRING_new();
628 if (!ret)
629 goto err;
630 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
631 goto err;
632
633 return ret;
634
635 err:
636 if (iptmp)
637 OPENSSL_free(iptmp);
638 if (ret)
639 ASN1_OCTET_STRING_free(ret);
640 return NULL;
641 }
642
643
644 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
645 {
646 /* If string contains a ':' assume IPv6 */
647
648 if (strchr(ipasc, ':'))
649 {
650 if (!ipv6_from_asc(ipout, ipasc))
651 return 0;
652 return 16;
653 }
654 else
655 {
656 if (!ipv4_from_asc(ipout, ipasc))
657 return 0;
658 return 4;
659 }
660 }
661
662 static int ipv4_from_asc(unsigned char *v4, const char *in)
663 {
664 int a0, a1, a2, a3;
665 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
666 return 0;
667 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
668 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
669 return 0;
670 v4[0] = a0;
671 v4[1] = a1;
672 v4[2] = a2;
673 v4[3] = a3;
674 return 1;
675 }
676
677 typedef struct {
678 /* Temporary store for IPV6 output */
679 unsigned char tmp[16];
680 /* Total number of bytes in tmp */
681 int total;
682 /* The position of a zero (corresponding to '::') */
683 int zero_pos;
684 /* Number of zeroes */
685 int zero_cnt;
686 } IPV6_STAT;
687
688
689 static int ipv6_from_asc(unsigned char *v6, const char *in)
690 {
691 IPV6_STAT v6stat;
692 v6stat.total = 0;
693 v6stat.zero_pos = -1;
694 v6stat.zero_cnt = 0;
695 /* Treat the IPv6 representation as a list of values
696 * separated by ':'. The presence of a '::' will parse
697 * as one, two or three zero length elements.
698 */
699 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
700 return 0;
701
702 /* Now for some sanity checks */
703
704 if (v6stat.zero_pos == -1)
705 {
706 /* If no '::' must have exactly 16 bytes */
707 if (v6stat.total != 16)
708 return 0;
709 }
710 else
711 {
712 /* If '::' must have less than 16 bytes */
713 if (v6stat.total == 16)
714 return 0;
715 /* More than three zeroes is an error */
716 if (v6stat.zero_cnt > 3)
717 return 0;
718 /* Can only have three zeroes if nothing else present */
719 else if (v6stat.zero_cnt == 3)
720 {
721 if (v6stat.total > 0)
722 return 0;
723 }
724 /* Can only have two zeroes if at start or end */
725 else if (v6stat.zero_cnt == 2)
726 {
727 if ((v6stat.zero_pos != 0)
728 && (v6stat.zero_pos != v6stat.total))
729 return 0;
730 }
731 else
732 /* Can only have one zero if *not* start or end */
733 {
734 if ((v6stat.zero_pos == 0)
735 || (v6stat.zero_pos == v6stat.total))
736 return 0;
737 }
738 }
739
740 /* Format result */
741
742 if (v6stat.zero_pos >= 0)
743 {
744 /* Copy initial part */
745 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
746 /* Zero middle */
747 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
748 /* Copy final part */
749 if (v6stat.total != v6stat.zero_pos)
750 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
751 v6stat.tmp + v6stat.zero_pos,
752 v6stat.total - v6stat.zero_pos);
753 }
754 else
755 memcpy(v6, v6stat.tmp, 16);
756
757 return 1;
758 }
759
760 static int ipv6_cb(const char *elem, int len, void *usr)
761 {
762 IPV6_STAT *s = usr;
763 /* Error if 16 bytes written */
764 if (s->total == 16)
765 return 0;
766 if (len == 0)
767 {
768 /* Zero length element, corresponds to '::' */
769 if (s->zero_pos == -1)
770 s->zero_pos = s->total;
771 /* If we've already got a :: its an error */
772 else if (s->zero_pos != s->total)
773 return 0;
774 s->zero_cnt++;
775 }
776 else
777 {
778 /* If more than 4 characters could be final a.b.c.d form */
779 if (len > 4)
780 {
781 /* Need at least 4 bytes left */
782 if (s->total > 12)
783 return 0;
784 /* Must be end of string */
785 if (elem[len])
786 return 0;
787 if (!ipv4_from_asc(s->tmp + s->total, elem))
788 return 0;
789 s->total += 4;
790 }
791 else
792 {
793 if (!ipv6_hex(s->tmp + s->total, elem, len))
794 return 0;
795 s->total += 2;
796 }
797 }
798 return 1;
799 }
800
801 /* Convert a string of up to 4 hex digits into the corresponding
802 * IPv6 form.
803 */
804
805 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
806 {
807 unsigned char c;
808 unsigned int num = 0;
809 if (inlen > 4)
810 return 0;
811 while(inlen--)
812 {
813 c = *in++;
814 num <<= 4;
815 if ((c >= '0') && (c <= '9'))
816 num |= c - '0';
817 else if ((c >= 'A') && (c <= 'F'))
818 num |= c - 'A' + 10;
819 else if ((c >= 'a') && (c <= 'f'))
820 num |= c - 'a' + 10;
821 else
822 return 0;
823 }
824 out[0] = num >> 8;
825 out[1] = num & 0xff;
826 return 1;
827 }
828
829
830 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
831 unsigned long chtype)
832 {
833 CONF_VALUE *v;
834 int i, mval;
835 char *p, *type;
836 if (!nm)
837 return 0;
838
839 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
840 {
841 v=sk_CONF_VALUE_value(dn_sk,i);
842 type=v->name;
843 /* Skip past any leading X. X: X, etc to allow for
844 * multiple instances
845 */
846 for(p = type; *p ; p++)
847 #ifndef CHARSET_EBCDIC
848 if ((*p == ':') || (*p == ',') || (*p == '.'))
849 #else
850 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
851 #endif
852 {
853 p++;
854 if(*p) type = p;
855 break;
856 }
857 #ifndef CHARSET_EBCDIC
858 if (*type == '+')
859 #else
860 if (*type == os_toascii['+'])
861 #endif
862 {
863 mval = -1;
864 type++;
865 }
866 else
867 mval = 0;
868 if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
869 (unsigned char *) v->value,-1,-1,mval))
870 return 0;
871
872 }
873 return 1;
874 }