3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
59 /* X509 v3 extension utilities */
64 #include <openssl/conf.h>
65 #include <openssl/x509v3.h>
66 #include <openssl/bn.h>
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,
72 static void str_free(OPENSSL_STRING str);
73 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
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);
80 /* Add a CONF_VALUE name value pair to stack */
82 int X509V3_add_value(const char *name, const char *value,
83 STACK_OF(CONF_VALUE) **extlist)
85 CONF_VALUE *vtmp = NULL;
86 char *tname = NULL, *tvalue = NULL;
87 if (name && !(tname = BUF_strdup(name)))
89 if (value && !(tvalue = BUF_strdup(value)))
91 if (!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
93 if (!*extlist && !(*extlist = sk_CONF_VALUE_new_null()))
98 if (!sk_CONF_VALUE_push(*extlist, vtmp))
102 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
108 OPENSSL_free(tvalue);
112 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
113 STACK_OF(CONF_VALUE) **extlist)
115 return X509V3_add_value(name, (const char *)value, extlist);
118 /* Free function for STACK_OF(CONF_VALUE) */
120 void X509V3_conf_free(CONF_VALUE *conf)
125 OPENSSL_free(conf->name);
127 OPENSSL_free(conf->value);
129 OPENSSL_free(conf->section);
133 int X509V3_add_value_bool(const char *name, int asn1_bool,
134 STACK_OF(CONF_VALUE) **extlist)
137 return X509V3_add_value(name, "TRUE", extlist);
138 return X509V3_add_value(name, "FALSE", extlist);
141 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
142 STACK_OF(CONF_VALUE) **extlist)
145 return X509V3_add_value(name, "TRUE", extlist);
149 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
151 BIGNUM *bntmp = NULL;
155 if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
156 !(strtmp = BN_bn2dec(bntmp)))
157 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
162 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
164 BIGNUM *bntmp = NULL;
168 if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
169 !(strtmp = BN_bn2dec(bntmp)))
170 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
175 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
182 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
186 if (value[0] == '-') {
192 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
199 ret = BN_hex2bn(&bn, value);
201 ret = BN_dec2bn(&bn, value);
203 if (!ret || value[ret]) {
205 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
209 if (isneg && BN_is_zero(bn))
212 aint = BN_to_ASN1_INTEGER(bn, NULL);
215 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
216 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
220 aint->type |= V_ASN1_NEG;
224 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
225 STACK_OF(CONF_VALUE) **extlist)
231 if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint)))
233 ret = X509V3_add_value(name, strtmp, extlist);
234 OPENSSL_free(strtmp);
238 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
241 if (!(btmp = value->value))
243 if (!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
244 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
245 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
248 } else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
249 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
250 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
255 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
256 X509V3_R_INVALID_BOOLEAN_STRING);
257 X509V3_conf_err(value);
261 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
264 if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
265 X509V3_conf_err(value);
279 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
283 STACK_OF(CONF_VALUE) *values = NULL;
286 /* We are going to modify the line so copy it first */
287 linebuf = BUF_strdup(line);
288 if (linebuf == NULL) {
289 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
294 /* Go through all characters */
295 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
303 ntmp = strip_spaces(q);
305 X509V3err(X509V3_F_X509V3_PARSE_LIST,
306 X509V3_R_INVALID_NULL_NAME);
310 } else if (c == ',') {
312 ntmp = strip_spaces(q);
315 printf("%s\n", ntmp);
318 X509V3err(X509V3_F_X509V3_PARSE_LIST,
319 X509V3_R_INVALID_NULL_NAME);
322 X509V3_add_value(ntmp, NULL, &values);
330 vtmp = strip_spaces(q);
332 printf("%s\n", ntmp);
335 X509V3err(X509V3_F_X509V3_PARSE_LIST,
336 X509V3_R_INVALID_NULL_VALUE);
339 X509V3_add_value(ntmp, vtmp, &values);
347 if (state == HDR_VALUE) {
348 vtmp = strip_spaces(q);
350 printf("%s=%s\n", ntmp, vtmp);
353 X509V3err(X509V3_F_X509V3_PARSE_LIST,
354 X509V3_R_INVALID_NULL_VALUE);
357 X509V3_add_value(ntmp, vtmp, &values);
359 ntmp = strip_spaces(q);
361 printf("%s\n", ntmp);
364 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
367 X509V3_add_value(ntmp, NULL, &values);
369 OPENSSL_free(linebuf);
373 OPENSSL_free(linebuf);
374 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
379 /* Delete leading and trailing spaces from a string */
380 static char *strip_spaces(char *name)
383 /* Skip over leading spaces */
385 while (*p && isspace((unsigned char)*p))
389 q = p + strlen(p) - 1;
390 while ((q != p) && isspace((unsigned char)*q))
399 /* hex string utilities */
402 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
403 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
404 * on EBCDIC machines)
407 char *hex_to_string(const unsigned char *buffer, long len)
410 const unsigned char *p;
412 const static char hexdig[] = "0123456789ABCDEF";
415 if (!(tmp = OPENSSL_malloc(len * 3 + 1))) {
416 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
420 for (i = 0, p = buffer; i < len; i++, p++) {
421 *q++ = hexdig[(*p >> 4) & 0xf];
422 *q++ = hexdig[*p & 0xf];
426 #ifdef CHARSET_EBCDIC
427 ebcdic2ascii(tmp, tmp, q - tmp - 1);
434 * Give a string of hex digits convert to a buffer
437 unsigned char *string_to_hex(const char *str, long *len)
439 unsigned char *hexbuf, *q;
440 unsigned char ch, cl, *p;
442 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
445 if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1)))
447 for (p = (unsigned char *)str, q = hexbuf; *p;) {
449 #ifdef CHARSET_EBCDIC
450 ch = os_toebcdic[ch];
455 #ifdef CHARSET_EBCDIC
456 cl = os_toebcdic[cl];
459 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
460 OPENSSL_free(hexbuf);
468 if ((ch >= '0') && (ch <= '9'))
470 else if ((ch >= 'a') && (ch <= 'f'))
475 if ((cl >= '0') && (cl <= '9'))
477 else if ((cl >= 'a') && (cl <= 'f'))
482 *q++ = (ch << 4) | cl;
492 OPENSSL_free(hexbuf);
493 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
497 OPENSSL_free(hexbuf);
498 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
504 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
507 int name_cmp(const char *name, const char *cmp)
512 if ((ret = strncmp(name, cmp, len)))
515 if (!c || (c == '.'))
520 static int sk_strcmp(const char *const *a, const char *const *b)
522 return strcmp(*a, *b);
525 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
528 STACK_OF(OPENSSL_STRING) *ret;
530 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
531 ret = get_email(X509_get_subject_name(x), gens);
532 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
536 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
538 AUTHORITY_INFO_ACCESS *info;
539 STACK_OF(OPENSSL_STRING) *ret = NULL;
542 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
545 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
546 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
547 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
548 if (ad->location->type == GEN_URI) {
550 (&ret, ad->location->d.uniformResourceIdentifier))
555 AUTHORITY_INFO_ACCESS_free(info);
559 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
562 STACK_OF(X509_EXTENSION) *exts;
563 STACK_OF(OPENSSL_STRING) *ret;
565 exts = X509_REQ_get_extensions(x);
566 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
567 ret = get_email(X509_REQ_get_subject_name(x), gens);
568 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
569 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
573 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
576 STACK_OF(OPENSSL_STRING) *ret = NULL;
578 ASN1_IA5STRING *email;
581 /* Now add any email address(es) to STACK */
583 /* First supplied X509_NAME */
584 while ((i = X509_NAME_get_index_by_NID(name,
585 NID_pkcs9_emailAddress, i)) >= 0) {
586 ne = X509_NAME_get_entry(name, i);
587 email = X509_NAME_ENTRY_get_data(ne);
588 if (!append_ia5(&ret, email))
591 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
592 gen = sk_GENERAL_NAME_value(gens, i);
593 if (gen->type != GEN_EMAIL)
595 if (!append_ia5(&ret, gen->d.ia5))
601 static void str_free(OPENSSL_STRING str)
606 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
609 /* First some sanity checks */
610 if (email->type != V_ASN1_IA5STRING)
612 if (!email->data || !email->length)
615 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
618 /* Don't add duplicates */
619 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
621 emtmp = BUF_strdup((char *)email->data);
622 if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
623 X509_email_free(*sk);
630 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
632 sk_OPENSSL_STRING_pop_free(sk, str_free);
636 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
640 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
642 unsigned char ipout[16];
643 ASN1_OCTET_STRING *ret;
646 /* If string contains a ':' assume IPv6 */
648 iplen = a2i_ipadd(ipout, ipasc);
653 ret = ASN1_OCTET_STRING_new();
656 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
657 ASN1_OCTET_STRING_free(ret);
663 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
665 ASN1_OCTET_STRING *ret = NULL;
666 unsigned char ipout[32];
667 char *iptmp = NULL, *p;
669 p = strchr(ipasc, '/');
672 iptmp = BUF_strdup(ipasc);
675 p = iptmp + (p - ipasc);
678 iplen1 = a2i_ipadd(ipout, iptmp);
683 iplen2 = a2i_ipadd(ipout + iplen1, p);
688 if (!iplen2 || (iplen1 != iplen2))
691 ret = ASN1_OCTET_STRING_new();
694 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
703 ASN1_OCTET_STRING_free(ret);
707 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
709 /* If string contains a ':' assume IPv6 */
711 if (strchr(ipasc, ':')) {
712 if (!ipv6_from_asc(ipout, ipasc))
716 if (!ipv4_from_asc(ipout, ipasc))
722 static int ipv4_from_asc(unsigned char *v4, const char *in)
725 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
727 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
728 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
738 /* Temporary store for IPV6 output */
739 unsigned char tmp[16];
740 /* Total number of bytes in tmp */
742 /* The position of a zero (corresponding to '::') */
744 /* Number of zeroes */
748 static int ipv6_from_asc(unsigned char *v6, const char *in)
752 v6stat.zero_pos = -1;
755 * Treat the IPv6 representation as a list of values separated by ':'.
756 * The presence of a '::' will parse as one, two or three zero length
759 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
762 /* Now for some sanity checks */
764 if (v6stat.zero_pos == -1) {
765 /* If no '::' must have exactly 16 bytes */
766 if (v6stat.total != 16)
769 /* If '::' must have less than 16 bytes */
770 if (v6stat.total == 16)
772 /* More than three zeroes is an error */
773 if (v6stat.zero_cnt > 3)
775 /* Can only have three zeroes if nothing else present */
776 else if (v6stat.zero_cnt == 3) {
777 if (v6stat.total > 0)
780 /* Can only have two zeroes if at start or end */
781 else if (v6stat.zero_cnt == 2) {
782 if ((v6stat.zero_pos != 0)
783 && (v6stat.zero_pos != v6stat.total))
786 /* Can only have one zero if *not* start or end */
788 if ((v6stat.zero_pos == 0)
789 || (v6stat.zero_pos == v6stat.total))
796 if (v6stat.zero_pos >= 0) {
797 /* Copy initial part */
798 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
800 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
801 /* Copy final part */
802 if (v6stat.total != v6stat.zero_pos)
803 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
804 v6stat.tmp + v6stat.zero_pos,
805 v6stat.total - v6stat.zero_pos);
807 memcpy(v6, v6stat.tmp, 16);
812 static int ipv6_cb(const char *elem, int len, void *usr)
815 /* Error if 16 bytes written */
819 /* Zero length element, corresponds to '::' */
820 if (s->zero_pos == -1)
821 s->zero_pos = s->total;
822 /* If we've already got a :: its an error */
823 else if (s->zero_pos != s->total)
827 /* If more than 4 characters could be final a.b.c.d form */
829 /* Need at least 4 bytes left */
832 /* Must be end of string */
835 if (!ipv4_from_asc(s->tmp + s->total, elem))
839 if (!ipv6_hex(s->tmp + s->total, elem, len))
848 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
851 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
854 unsigned int num = 0;
860 if ((c >= '0') && (c <= '9'))
862 else if ((c >= 'A') && (c <= 'F'))
864 else if ((c >= 'a') && (c <= 'f'))
874 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
875 unsigned long chtype)
883 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
884 v = sk_CONF_VALUE_value(dn_sk, i);
887 * Skip past any leading X. X: X, etc to allow for multiple instances
889 for (p = type; *p; p++)
890 #ifndef CHARSET_EBCDIC
891 if ((*p == ':') || (*p == ',') || (*p == '.'))
893 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
894 || (*p == os_toascii['.']))
902 #ifndef CHARSET_EBCDIC
905 if (*type == os_toascii['+'])
912 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
913 (unsigned char *)v->value, -1, -1,