1 /* $OpenBSD: v3_utl.c,v 1.23 2014/07/13 16:03:10 beck Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 /* X509 v3 extension utilities */
64 #include <openssl/bn.h>
65 #include <openssl/conf.h>
66 #include <openssl/err.h>
67 #include <openssl/x509v3.h>
69 static char *strip_spaces(char *name);
70 static int sk_strcmp(const char * const *a, const char * const *b);
71 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
73 static void str_free(OPENSSL_STRING str);
74 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
76 static int ipv4_from_asc(unsigned char *v4, const char *in);
77 static int ipv6_from_asc(unsigned char *v6, const char *in);
78 static int ipv6_cb(const char *elem, int len, void *usr);
79 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
81 /* Add a CONF_VALUE name value pair to stack */
84 X509V3_add_value(const char *name, const char *value,
85 STACK_OF(CONF_VALUE) **extlist)
87 CONF_VALUE *vtmp = NULL;
88 char *tname = NULL, *tvalue = NULL;
90 if (name && !(tname = strdup(name)))
92 if (value && !(tvalue = strdup(value)))
94 if (!(vtmp = malloc(sizeof(CONF_VALUE))))
96 if (!*extlist && !(*extlist = sk_CONF_VALUE_new_null()))
100 vtmp->value = tvalue;
101 if (!sk_CONF_VALUE_push(*extlist, vtmp))
106 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
114 X509V3_add_value_uchar(const char *name, const unsigned char *value,
115 STACK_OF(CONF_VALUE) **extlist)
117 return X509V3_add_value(name, (const char *)value, extlist);
120 /* Free function for STACK_OF(CONF_VALUE) */
123 X509V3_conf_free(CONF_VALUE *conf)
134 X509V3_add_value_bool(const char *name, int asn1_bool,
135 STACK_OF(CONF_VALUE) **extlist)
138 return X509V3_add_value(name, "TRUE", extlist);
139 return X509V3_add_value(name, "FALSE", extlist);
143 X509V3_add_value_bool_nf(char *name, int asn1_bool,
144 STACK_OF(CONF_VALUE) **extlist)
147 return X509V3_add_value(name, "TRUE", extlist);
153 i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
155 BIGNUM *bntmp = NULL;
160 if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
161 !(strtmp = BN_bn2dec(bntmp)))
162 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
168 i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
170 BIGNUM *bntmp = NULL;
175 if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
176 !(strtmp = BN_bn2dec(bntmp)))
177 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
183 s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
191 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
192 X509V3_R_INVALID_NULL_VALUE);
196 if (value[0] == '-') {
202 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
209 ret = BN_hex2bn(&bn, value);
211 ret = BN_dec2bn(&bn, value);
213 if (!ret || value[ret]) {
215 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
219 if (isneg && BN_is_zero(bn))
222 aint = BN_to_ASN1_INTEGER(bn, NULL);
225 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
226 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
230 aint->type |= V_ASN1_NEG;
235 X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
236 STACK_OF(CONF_VALUE) **extlist)
243 if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint)))
245 ret = X509V3_add_value(name, strtmp, extlist);
251 X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
255 if (!(btmp = value->value))
257 if (!strcmp(btmp, "TRUE") || !strcmp(btmp, "true") ||
258 !strcmp(btmp, "Y") || !strcmp(btmp, "y") ||
259 !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
262 } else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false") ||
263 !strcmp(btmp, "N") || !strcmp(btmp, "n") ||
264 !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
270 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
271 X509V3_R_INVALID_BOOLEAN_STRING);
272 X509V3_conf_err(value);
277 X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
281 if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
282 X509V3_conf_err(value);
294 STACK_OF(CONF_VALUE) *
295 X509V3_parse_list(const char *line)
299 STACK_OF(CONF_VALUE) *values = NULL;
303 /* We are going to modify the line so copy it first */
304 if ((linebuf = strdup(line)) == NULL) {
305 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
311 /* Go through all characters */
312 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') &&
320 ntmp = strip_spaces(q);
322 X509V3err(X509V3_F_X509V3_PARSE_LIST,
323 X509V3_R_INVALID_NULL_NAME);
327 } else if (c == ',') {
329 ntmp = strip_spaces(q);
332 X509V3err(X509V3_F_X509V3_PARSE_LIST,
333 X509V3_R_INVALID_NULL_NAME);
336 X509V3_add_value(ntmp, NULL, &values);
344 vtmp = strip_spaces(q);
346 X509V3err(X509V3_F_X509V3_PARSE_LIST,
347 X509V3_R_INVALID_NULL_VALUE);
350 X509V3_add_value(ntmp, vtmp, &values);
358 if (state == HDR_VALUE) {
359 vtmp = strip_spaces(q);
361 X509V3err(X509V3_F_X509V3_PARSE_LIST,
362 X509V3_R_INVALID_NULL_VALUE);
365 X509V3_add_value(ntmp, vtmp, &values);
367 ntmp = strip_spaces(q);
369 X509V3err(X509V3_F_X509V3_PARSE_LIST,
370 X509V3_R_INVALID_NULL_NAME);
373 X509V3_add_value(ntmp, NULL, &values);
380 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
385 /* Delete leading and trailing spaces from a string */
387 strip_spaces(char *name)
391 /* Skip over leading spaces */
393 while (*p && isspace((unsigned char)*p))
397 q = p + strlen(p) - 1;
398 while ((q != p) && isspace((unsigned char)*q))
407 /* hex string utilities */
409 /* Given a buffer of length 'len' return a malloc'ed string with its
413 hex_to_string(const unsigned char *buffer, long len)
416 const unsigned char *p;
418 static const char hexdig[] = "0123456789ABCDEF";
422 if (!(tmp = malloc(len * 3 + 1))) {
423 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
427 for (i = 0, p = buffer; i < len; i++, p++) {
428 *q++ = hexdig[(*p >> 4) & 0xf];
429 *q++ = hexdig[*p & 0xf];
436 /* Give a string of hex digits convert to
441 string_to_hex(const char *str, long *len)
443 unsigned char *hexbuf, *q;
444 unsigned char ch, cl, *p;
446 X509V3err(X509V3_F_STRING_TO_HEX,
447 X509V3_R_INVALID_NULL_ARGUMENT);
450 if (!(hexbuf = malloc(strlen(str) >> 1)))
452 for (p = (unsigned char *)str, q = hexbuf; *p; ) {
458 X509V3err(X509V3_F_STRING_TO_HEX,
459 X509V3_R_ODD_NUMBER_OF_DIGITS);
466 if ((ch >= '0') && (ch <= '9'))
468 else if ((ch >= 'a') && (ch <= 'f'))
473 if ((cl >= '0') && (cl <= '9'))
475 else if ((cl >= 'a') && (cl <= 'f'))
480 *q++ = (ch << 4) | cl;
490 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
495 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
499 /* V2I name comparison function: returns zero if 'name' matches
504 name_cmp(const char *name, const char *cmp)
510 if ((ret = strncmp(name, cmp, len)))
519 sk_strcmp(const char * const *a, const char * const *b)
521 return strcmp(*a, *b);
524 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
527 STACK_OF(OPENSSL_STRING) *ret;
529 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
530 ret = get_email(X509_get_subject_name(x), gens);
531 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
535 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
537 AUTHORITY_INFO_ACCESS *info;
538 STACK_OF(OPENSSL_STRING) *ret = NULL;
541 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
544 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
545 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
546 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
547 if (ad->location->type == GEN_URI) {
548 if (!append_ia5(&ret,
549 ad->location->d.uniformResourceIdentifier))
554 AUTHORITY_INFO_ACCESS_free(info);
558 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
561 STACK_OF(X509_EXTENSION) *exts;
562 STACK_OF(OPENSSL_STRING) *ret;
564 exts = X509_REQ_get_extensions(x);
565 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
566 ret = get_email(X509_REQ_get_subject_name(x), gens);
567 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
568 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
574 STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
576 STACK_OF(OPENSSL_STRING) *ret = NULL;
578 ASN1_IA5STRING *email;
582 /* Now add any email address(es) to STACK */
585 /* First supplied X509_NAME */
586 while ((i = X509_NAME_get_index_by_NID(name,
587 NID_pkcs9_emailAddress, i)) >= 0) {
588 ne = X509_NAME_get_entry(name, i);
589 email = X509_NAME_ENTRY_get_data(ne);
590 if (!append_ia5(&ret, email))
593 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
594 gen = sk_GENERAL_NAME_value(gens, i);
595 if (gen->type != GEN_EMAIL)
597 if (!append_ia5(&ret, gen->d.ia5))
604 str_free(OPENSSL_STRING str)
610 append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
614 /* First some sanity checks */
615 if (email->type != V_ASN1_IA5STRING)
617 if (!email->data || !email->length)
620 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
623 /* Don't add duplicates */
624 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
626 emtmp = strdup((char *)email->data);
627 if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
628 X509_email_free(*sk);
636 X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
638 sk_OPENSSL_STRING_pop_free(sk, str_free);
641 /* Convert IP addresses both IPv4 and IPv6 into an
642 * OCTET STRING compatible with RFC3280.
646 a2i_IPADDRESS(const char *ipasc)
648 unsigned char ipout[16];
649 ASN1_OCTET_STRING *ret;
652 /* If string contains a ':' assume IPv6 */
654 iplen = a2i_ipadd(ipout, ipasc);
659 ret = ASN1_OCTET_STRING_new();
662 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
663 ASN1_OCTET_STRING_free(ret);
670 a2i_IPADDRESS_NC(const char *ipasc)
672 ASN1_OCTET_STRING *ret = NULL;
673 unsigned char ipout[32];
674 char *iptmp = NULL, *p;
677 p = strchr(ipasc, '/');
680 iptmp = strdup(ipasc);
683 p = iptmp + (p - ipasc);
686 iplen1 = a2i_ipadd(ipout, iptmp);
691 iplen2 = a2i_ipadd(ipout + iplen1, p);
696 if (!iplen2 || (iplen1 != iplen2))
699 ret = ASN1_OCTET_STRING_new();
702 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
710 ASN1_OCTET_STRING_free(ret);
716 a2i_ipadd(unsigned char *ipout, const char *ipasc)
718 /* If string contains a ':' assume IPv6 */
720 if (strchr(ipasc, ':')) {
721 if (!ipv6_from_asc(ipout, ipasc))
725 if (!ipv4_from_asc(ipout, ipasc))
732 ipv4_from_asc(unsigned char *v4, const char *in)
735 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
737 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255) ||
738 (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
748 /* Temporary store for IPV6 output */
749 unsigned char tmp[16];
750 /* Total number of bytes in tmp */
752 /* The position of a zero (corresponding to '::') */
754 /* Number of zeroes */
760 ipv6_from_asc(unsigned char *v6, const char *in)
765 v6stat.zero_pos = -1;
768 /* Treat the IPv6 representation as a list of values
769 * separated by ':'. The presence of a '::' will parse
770 * as one, two or three zero length elements.
772 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
775 /* Now for some sanity checks */
777 if (v6stat.zero_pos == -1) {
778 /* If no '::' must have exactly 16 bytes */
779 if (v6stat.total != 16)
782 /* If '::' must have less than 16 bytes */
783 if (v6stat.total == 16)
785 /* More than three zeroes is an error */
786 if (v6stat.zero_cnt > 3)
788 /* Can only have three zeroes if nothing else present */
789 else if (v6stat.zero_cnt == 3) {
790 if (v6stat.total > 0)
793 /* Can only have two zeroes if at start or end */
794 else if (v6stat.zero_cnt == 2) {
795 if ((v6stat.zero_pos != 0) &&
796 (v6stat.zero_pos != v6stat.total))
799 /* Can only have one zero if *not* start or end */
801 if ((v6stat.zero_pos == 0) ||
802 (v6stat.zero_pos == v6stat.total))
809 if (v6stat.zero_pos >= 0) {
810 /* Copy initial part */
811 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
813 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
814 /* Copy final part */
815 if (v6stat.total != v6stat.zero_pos)
816 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
817 v6stat.tmp + v6stat.zero_pos,
818 v6stat.total - v6stat.zero_pos);
820 memcpy(v6, v6stat.tmp, 16);
826 ipv6_cb(const char *elem, int len, void *usr)
830 /* Error if 16 bytes written */
834 /* Zero length element, corresponds to '::' */
835 if (s->zero_pos == -1)
836 s->zero_pos = s->total;
837 /* If we've already got a :: its an error */
838 else if (s->zero_pos != s->total)
842 /* If more than 4 characters could be final a.b.c.d form */
844 /* Need at least 4 bytes left */
847 /* Must be end of string */
850 if (!ipv4_from_asc(s->tmp + s->total, elem))
854 if (!ipv6_hex(s->tmp + s->total, elem, len))
862 /* Convert a string of up to 4 hex digits into the corresponding
867 ipv6_hex(unsigned char *out, const char *in, int inlen)
870 unsigned int num = 0;
877 if ((c >= '0') && (c <= '9'))
879 else if ((c >= 'A') && (c <= 'F'))
881 else if ((c >= 'a') && (c <= 'f'))
892 X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
893 unsigned long chtype)
902 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
903 v = sk_CONF_VALUE_value(dn_sk, i);
905 /* Skip past any leading X. X: X, etc to allow for
908 for (p = type; *p; p++)
909 if ((*p == ':') || (*p == ',') || (*p == '.')) {
920 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
921 (unsigned char *) v->value, -1, -1, mval))