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Deprecate the recursive includes of bn.h from various API headers (asn1.h,
[thirdparty/openssl.git] / crypto / x509v3 / v3_utl.c
1 /* v3_utl.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 *get_email(X509_NAME *name, GENERAL_NAMES *gens);
71 static void str_free(void *str);
72 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
73
74 static int a2i_ipadd(unsigned char *ipout, const char *ipasc);
75 static int ipv4_from_asc(unsigned char *v4, const char *in);
76 static int ipv6_from_asc(unsigned char *v6, const char *in);
77 static int ipv6_cb(const char *elem, int len, void *usr);
78 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
79
80 /* Add a CONF_VALUE name value pair to stack */
81
82 int X509V3_add_value(const char *name, const char *value,
83 STACK_OF(CONF_VALUE) **extlist)
84 {
85 CONF_VALUE *vtmp = NULL;
86 char *tname = NULL, *tvalue = NULL;
87 if(name && !(tname = BUF_strdup(name))) goto err;
88 if(value && !(tvalue = BUF_strdup(value))) goto err;;
89 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
90 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
91 vtmp->section = NULL;
92 vtmp->name = tname;
93 vtmp->value = tvalue;
94 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
95 return 1;
96 err:
97 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
98 if(vtmp) OPENSSL_free(vtmp);
99 if(tname) OPENSSL_free(tname);
100 if(tvalue) OPENSSL_free(tvalue);
101 return 0;
102 }
103
104 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
105 STACK_OF(CONF_VALUE) **extlist)
106 {
107 return X509V3_add_value(name,(const char *)value,extlist);
108 }
109
110 /* Free function for STACK_OF(CONF_VALUE) */
111
112 void X509V3_conf_free(CONF_VALUE *conf)
113 {
114 if(!conf) return;
115 if(conf->name) OPENSSL_free(conf->name);
116 if(conf->value) OPENSSL_free(conf->value);
117 if(conf->section) OPENSSL_free(conf->section);
118 OPENSSL_free(conf);
119 }
120
121 int X509V3_add_value_bool(const char *name, int asn1_bool,
122 STACK_OF(CONF_VALUE) **extlist)
123 {
124 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
125 return X509V3_add_value(name, "FALSE", extlist);
126 }
127
128 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
129 STACK_OF(CONF_VALUE) **extlist)
130 {
131 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
132 return 1;
133 }
134
135
136 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
137 {
138 BIGNUM *bntmp = NULL;
139 char *strtmp = NULL;
140 if(!a) return NULL;
141 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
142 !(strtmp = BN_bn2dec(bntmp)) )
143 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
144 BN_free(bntmp);
145 return strtmp;
146 }
147
148 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
149 {
150 BIGNUM *bntmp = NULL;
151 char *strtmp = NULL;
152 if(!a) return NULL;
153 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
154 !(strtmp = BN_bn2dec(bntmp)) )
155 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
156 BN_free(bntmp);
157 return strtmp;
158 }
159
160 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
161 {
162 BIGNUM *bn = NULL;
163 ASN1_INTEGER *aint;
164 int isneg, ishex;
165 int ret;
166 if (!value) {
167 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
168 return 0;
169 }
170 bn = BN_new();
171 if (value[0] == '-') {
172 value++;
173 isneg = 1;
174 } else isneg = 0;
175
176 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
177 value += 2;
178 ishex = 1;
179 } else ishex = 0;
180
181 if (ishex) ret = BN_hex2bn(&bn, value);
182 else ret = BN_dec2bn(&bn, value);
183
184 if (!ret || value[ret]) {
185 BN_free(bn);
186 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
187 return 0;
188 }
189
190 if (isneg && BN_is_zero(bn)) isneg = 0;
191
192 aint = BN_to_ASN1_INTEGER(bn, NULL);
193 BN_free(bn);
194 if (!aint) {
195 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
196 return 0;
197 }
198 if (isneg) aint->type |= V_ASN1_NEG;
199 return aint;
200 }
201
202 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
203 STACK_OF(CONF_VALUE) **extlist)
204 {
205 char *strtmp;
206 int ret;
207 if(!aint) return 1;
208 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
209 ret = X509V3_add_value(name, strtmp, extlist);
210 OPENSSL_free(strtmp);
211 return ret;
212 }
213
214 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
215 {
216 char *btmp;
217 if(!(btmp = value->value)) goto err;
218 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
219 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
220 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
221 *asn1_bool = 0xff;
222 return 1;
223 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
224 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
225 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
226 *asn1_bool = 0;
227 return 1;
228 }
229 err:
230 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
231 X509V3_conf_err(value);
232 return 0;
233 }
234
235 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
236 {
237 ASN1_INTEGER *itmp;
238 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
239 X509V3_conf_err(value);
240 return 0;
241 }
242 *aint = itmp;
243 return 1;
244 }
245
246 #define HDR_NAME 1
247 #define HDR_VALUE 2
248
249 /*#define DEBUG*/
250
251 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
252 {
253 char *p, *q, c;
254 char *ntmp, *vtmp;
255 STACK_OF(CONF_VALUE) *values = NULL;
256 char *linebuf;
257 int state;
258 /* We are going to modify the line so copy it first */
259 linebuf = BUF_strdup(line);
260 state = HDR_NAME;
261 ntmp = NULL;
262 /* Go through all characters */
263 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
264
265 switch(state) {
266 case HDR_NAME:
267 if(c == ':') {
268 state = HDR_VALUE;
269 *p = 0;
270 ntmp = strip_spaces(q);
271 if(!ntmp) {
272 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
273 goto err;
274 }
275 q = p + 1;
276 } else if(c == ',') {
277 *p = 0;
278 ntmp = strip_spaces(q);
279 q = p + 1;
280 #if 0
281 printf("%s\n", ntmp);
282 #endif
283 if(!ntmp) {
284 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
285 goto err;
286 }
287 X509V3_add_value(ntmp, NULL, &values);
288 }
289 break ;
290
291 case HDR_VALUE:
292 if(c == ',') {
293 state = HDR_NAME;
294 *p = 0;
295 vtmp = strip_spaces(q);
296 #if 0
297 printf("%s\n", ntmp);
298 #endif
299 if(!vtmp) {
300 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
301 goto err;
302 }
303 X509V3_add_value(ntmp, vtmp, &values);
304 ntmp = NULL;
305 q = p + 1;
306 }
307
308 }
309 }
310
311 if(state == HDR_VALUE) {
312 vtmp = strip_spaces(q);
313 #if 0
314 printf("%s=%s\n", ntmp, vtmp);
315 #endif
316 if(!vtmp) {
317 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
318 goto err;
319 }
320 X509V3_add_value(ntmp, vtmp, &values);
321 } else {
322 ntmp = strip_spaces(q);
323 #if 0
324 printf("%s\n", ntmp);
325 #endif
326 if(!ntmp) {
327 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
328 goto err;
329 }
330 X509V3_add_value(ntmp, NULL, &values);
331 }
332 OPENSSL_free(linebuf);
333 return values;
334
335 err:
336 OPENSSL_free(linebuf);
337 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
338 return NULL;
339
340 }
341
342 /* Delete leading and trailing spaces from a string */
343 static char *strip_spaces(char *name)
344 {
345 char *p, *q;
346 /* Skip over leading spaces */
347 p = name;
348 while(*p && isspace((unsigned char)*p)) p++;
349 if(!*p) return NULL;
350 q = p + strlen(p) - 1;
351 while((q != p) && isspace((unsigned char)*q)) q--;
352 if(p != q) q[1] = 0;
353 if(!*p) return NULL;
354 return p;
355 }
356
357 /* hex string utilities */
358
359 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
360 * hex representation
361 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
362 */
363
364 char *hex_to_string(unsigned char *buffer, long len)
365 {
366 char *tmp, *q;
367 unsigned char *p;
368 int i;
369 static char hexdig[] = "0123456789ABCDEF";
370 if(!buffer || !len) return NULL;
371 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
372 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
373 return NULL;
374 }
375 q = tmp;
376 for(i = 0, p = buffer; i < len; i++,p++) {
377 *q++ = hexdig[(*p >> 4) & 0xf];
378 *q++ = hexdig[*p & 0xf];
379 *q++ = ':';
380 }
381 q[-1] = 0;
382 #ifdef CHARSET_EBCDIC
383 ebcdic2ascii(tmp, tmp, q - tmp - 1);
384 #endif
385
386 return tmp;
387 }
388
389 /* Give a string of hex digits convert to
390 * a buffer
391 */
392
393 unsigned char *string_to_hex(char *str, long *len)
394 {
395 unsigned char *hexbuf, *q;
396 unsigned char ch, cl, *p;
397 if(!str) {
398 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
399 return NULL;
400 }
401 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
402 for(p = (unsigned char *)str, q = hexbuf; *p;) {
403 ch = *p++;
404 #ifdef CHARSET_EBCDIC
405 ch = os_toebcdic[ch];
406 #endif
407 if(ch == ':') continue;
408 cl = *p++;
409 #ifdef CHARSET_EBCDIC
410 cl = os_toebcdic[cl];
411 #endif
412 if(!cl) {
413 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
414 OPENSSL_free(hexbuf);
415 return NULL;
416 }
417 if(isupper(ch)) ch = tolower(ch);
418 if(isupper(cl)) cl = tolower(cl);
419
420 if((ch >= '0') && (ch <= '9')) ch -= '0';
421 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
422 else goto badhex;
423
424 if((cl >= '0') && (cl <= '9')) cl -= '0';
425 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
426 else goto badhex;
427
428 *q++ = (ch << 4) | cl;
429 }
430
431 if(len) *len = q - hexbuf;
432
433 return hexbuf;
434
435 err:
436 if(hexbuf) OPENSSL_free(hexbuf);
437 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
438 return NULL;
439
440 badhex:
441 OPENSSL_free(hexbuf);
442 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
443 return NULL;
444
445 }
446
447 /* V2I name comparison function: returns zero if 'name' matches
448 * cmp or cmp.*
449 */
450
451 int name_cmp(const char *name, const char *cmp)
452 {
453 int len, ret;
454 char c;
455 len = strlen(cmp);
456 if((ret = strncmp(name, cmp, len))) return ret;
457 c = name[len];
458 if(!c || (c=='.')) return 0;
459 return 1;
460 }
461
462 static int sk_strcmp(const char * const *a, const char * const *b)
463 {
464 return strcmp(*a, *b);
465 }
466
467 STACK *X509_get1_email(X509 *x)
468 {
469 GENERAL_NAMES *gens;
470 STACK *ret;
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 *X509_REQ_get1_email(X509_REQ *x)
478 {
479 GENERAL_NAMES *gens;
480 STACK_OF(X509_EXTENSION) *exts;
481 STACK *ret;
482 exts = X509_REQ_get_extensions(x);
483 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
484 ret = get_email(X509_REQ_get_subject_name(x), gens);
485 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
486 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
487 return ret;
488 }
489
490
491 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
492 {
493 STACK *ret = NULL;
494 X509_NAME_ENTRY *ne;
495 ASN1_IA5STRING *email;
496 GENERAL_NAME *gen;
497 int i;
498 /* Now add any email address(es) to STACK */
499 i = -1;
500 /* First supplied X509_NAME */
501 while((i = X509_NAME_get_index_by_NID(name,
502 NID_pkcs9_emailAddress, i)) >= 0) {
503 ne = X509_NAME_get_entry(name, i);
504 email = X509_NAME_ENTRY_get_data(ne);
505 if(!append_ia5(&ret, email)) return NULL;
506 }
507 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
508 {
509 gen = sk_GENERAL_NAME_value(gens, i);
510 if(gen->type != GEN_EMAIL) continue;
511 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
512 }
513 return ret;
514 }
515
516 static void str_free(void *str)
517 {
518 OPENSSL_free(str);
519 }
520
521 static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
522 {
523 char *emtmp;
524 /* First some sanity checks */
525 if(email->type != V_ASN1_IA5STRING) return 1;
526 if(!email->data || !email->length) return 1;
527 if(!*sk) *sk = sk_new(sk_strcmp);
528 if(!*sk) return 0;
529 /* Don't add duplicates */
530 if(sk_find(*sk, (char *)email->data) != -1) return 1;
531 emtmp = BUF_strdup((char *)email->data);
532 if(!emtmp || !sk_push(*sk, emtmp)) {
533 X509_email_free(*sk);
534 *sk = NULL;
535 return 0;
536 }
537 return 1;
538 }
539
540 void X509_email_free(STACK *sk)
541 {
542 sk_pop_free(sk, str_free);
543 }
544
545 /* Convert IP addresses both IPv4 and IPv6 into an
546 * OCTET STRING compatible with RFC3280.
547 */
548
549 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
550 {
551 unsigned char ipout[16];
552 ASN1_OCTET_STRING *ret;
553 int iplen;
554
555 /* If string contains a ':' assume IPv6 */
556
557 iplen = a2i_ipadd(ipout, ipasc);
558
559 if (!iplen)
560 return NULL;
561
562 ret = ASN1_OCTET_STRING_new();
563 if (!ret)
564 return NULL;
565 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
566 {
567 ASN1_OCTET_STRING_free(ret);
568 return NULL;
569 }
570 return ret;
571 }
572
573 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
574 {
575 ASN1_OCTET_STRING *ret = NULL;
576 unsigned char ipout[32];
577 char *iptmp = NULL, *p;
578 int iplen1, iplen2;
579 p = strchr(ipasc,'/');
580 if (!p)
581 return NULL;
582 iptmp = BUF_strdup(ipasc);
583 if (!iptmp)
584 return NULL;
585 p = iptmp + (p - ipasc);
586 *p++ = 0;
587
588 iplen1 = a2i_ipadd(ipout, iptmp);
589
590 if (!iplen1)
591 goto err;
592
593 iplen2 = a2i_ipadd(ipout + iplen1, p);
594
595 OPENSSL_free(iptmp);
596 iptmp = NULL;
597
598 if (!iplen2 || (iplen1 != iplen2))
599 goto err;
600
601 ret = ASN1_OCTET_STRING_new();
602 if (!ret)
603 goto err;
604 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
605 goto err;
606
607 return ret;
608
609 err:
610 if (iptmp)
611 OPENSSL_free(iptmp);
612 if (ret)
613 ASN1_OCTET_STRING_free(ret);
614 return NULL;
615 }
616
617
618 static int a2i_ipadd(unsigned char *ipout, const char *ipasc)
619 {
620 /* If string contains a ':' assume IPv6 */
621
622 if (strchr(ipasc, ':'))
623 {
624 if (!ipv6_from_asc(ipout, ipasc))
625 return 0;
626 return 16;
627 }
628 else
629 {
630 if (!ipv4_from_asc(ipout, ipasc))
631 return 0;
632 return 4;
633 }
634 }
635
636 static int ipv4_from_asc(unsigned char *v4, const char *in)
637 {
638 int a0, a1, a2, a3;
639 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
640 return 0;
641 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
642 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
643 return 0;
644 v4[0] = a0;
645 v4[1] = a1;
646 v4[2] = a2;
647 v4[3] = a3;
648 return 1;
649 }
650
651 typedef struct {
652 /* Temporary store for IPV6 output */
653 unsigned char tmp[16];
654 /* Total number of bytes in tmp */
655 int total;
656 /* The position of a zero (corresponding to '::') */
657 int zero_pos;
658 /* Number of zeroes */
659 int zero_cnt;
660 } IPV6_STAT;
661
662
663 static int ipv6_from_asc(unsigned char *v6, const char *in)
664 {
665 IPV6_STAT v6stat;
666 v6stat.total = 0;
667 v6stat.zero_pos = -1;
668 v6stat.zero_cnt = 0;
669 /* Treat the IPv6 representation as a list of values
670 * separated by ':'. The presence of a '::' will parse
671 * as one, two or three zero length elements.
672 */
673 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
674 return 0;
675
676 /* Now for some sanity checks */
677
678 if (v6stat.zero_pos == -1)
679 {
680 /* If no '::' must have exactly 16 bytes */
681 if (v6stat.total != 16)
682 return 0;
683 }
684 else
685 {
686 /* If '::' must have less than 16 bytes */
687 if (v6stat.total == 16)
688 return 0;
689 /* More than three zeroes is an error */
690 if (v6stat.zero_cnt > 3)
691 return 0;
692 /* Can only have three zeroes if nothing else present */
693 else if (v6stat.zero_cnt == 3)
694 {
695 if (v6stat.total > 0)
696 return 0;
697 }
698 /* Can only have two zeroes if at start or end */
699 else if (v6stat.zero_cnt == 2)
700 {
701 if ((v6stat.zero_pos != 0)
702 && (v6stat.zero_pos != v6stat.total))
703 return 0;
704 }
705 else
706 /* Can only have one zero if *not* start or end */
707 {
708 if ((v6stat.zero_pos == 0)
709 || (v6stat.zero_pos == v6stat.total))
710 return 0;
711 }
712 }
713
714 /* Format result */
715
716 /* Copy initial part */
717 if (v6stat.zero_pos > 0)
718 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
719 /* Zero middle */
720 if (v6stat.total != 16)
721 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
722 /* Copy final part */
723 if (v6stat.total != v6stat.zero_pos)
724 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
725 v6stat.tmp + v6stat.zero_pos,
726 v6stat.total - v6stat.zero_pos);
727
728 return 1;
729 }
730
731 static int ipv6_cb(const char *elem, int len, void *usr)
732 {
733 IPV6_STAT *s = usr;
734 /* Error if 16 bytes written */
735 if (s->total == 16)
736 return 0;
737 if (len == 0)
738 {
739 /* Zero length element, corresponds to '::' */
740 if (s->zero_pos == -1)
741 s->zero_pos = s->total;
742 /* If we've already got a :: its an error */
743 else if (s->zero_pos != s->total)
744 return 0;
745 s->zero_cnt++;
746 }
747 else
748 {
749 /* If more than 4 characters could be final a.b.c.d form */
750 if (len > 4)
751 {
752 /* Need at least 4 bytes left */
753 if (s->total > 12)
754 return 0;
755 /* Must be end of string */
756 if (elem[len])
757 return 0;
758 if (!ipv4_from_asc(s->tmp + s->total, elem))
759 return 0;
760 s->total += 4;
761 }
762 else
763 {
764 if (!ipv6_hex(s->tmp + s->total, elem, len))
765 return 0;
766 s->total += 2;
767 }
768 }
769 return 1;
770 }
771
772 /* Convert a string of up to 4 hex digits into the corresponding
773 * IPv6 form.
774 */
775
776 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
777 {
778 unsigned char c;
779 unsigned int num = 0;
780 if (inlen > 4)
781 return 0;
782 while(inlen--)
783 {
784 c = *in++;
785 num <<= 4;
786 if ((c >= '0') && (c <= '9'))
787 num |= c - '0';
788 else if ((c >= 'A') && (c <= 'F'))
789 num |= c - 'A' + 10;
790 else if ((c >= 'a') && (c <= 'f'))
791 num |= c - 'a' + 10;
792 else
793 return 0;
794 }
795 out[0] = num >> 8;
796 out[1] = num & 0xff;
797 return 1;
798 }
799
800
801 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
802 unsigned long chtype)
803 {
804 CONF_VALUE *v;
805 int i, mval;
806 char *p, *type;
807 if (!nm)
808 return 0;
809
810 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
811 {
812 v=sk_CONF_VALUE_value(dn_sk,i);
813 type=v->name;
814 /* Skip past any leading X. X: X, etc to allow for
815 * multiple instances
816 */
817 for(p = type; *p ; p++)
818 #ifndef CHARSET_EBCDIC
819 if ((*p == ':') || (*p == ',') || (*p == '.'))
820 #else
821 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
822 #endif
823 {
824 p++;
825 if(*p) type = p;
826 break;
827 }
828 #ifndef CHARSET_EBCDIC
829 if (*p == '+')
830 #else
831 if (*p == os_toascii['+'])
832 #endif
833 {
834 mval = -1;
835 p++;
836 }
837 else
838 mval = 0;
839 if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
840 (unsigned char *) v->value,-1,-1,mval))
841 return 0;
842
843 }
844 return 1;
845 }
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