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 *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);
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);
79 /* Add a CONF_VALUE name value pair to stack */
81 int X509V3_add_value(const char *name, const char *value,
82 STACK_OF(CONF_VALUE) **extlist)
84 CONF_VALUE *vtmp = NULL;
85 char *tname = NULL, *tvalue = NULL;
86 if (name && !(tname = BUF_strdup(name)))
88 if (value && !(tvalue = BUF_strdup(value)))
90 if (!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
92 if (!*extlist && !(*extlist = sk_CONF_VALUE_new_null()))
97 if (!sk_CONF_VALUE_push(*extlist, vtmp))
101 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
107 OPENSSL_free(tvalue);
111 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
112 STACK_OF(CONF_VALUE) **extlist)
114 return X509V3_add_value(name, (const char *)value, extlist);
117 /* Free function for STACK_OF(CONF_VALUE) */
119 void X509V3_conf_free(CONF_VALUE *conf)
124 OPENSSL_free(conf->name);
126 OPENSSL_free(conf->value);
128 OPENSSL_free(conf->section);
132 int X509V3_add_value_bool(const char *name, int asn1_bool,
133 STACK_OF(CONF_VALUE) **extlist)
136 return X509V3_add_value(name, "TRUE", extlist);
137 return X509V3_add_value(name, "FALSE", extlist);
140 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
141 STACK_OF(CONF_VALUE) **extlist)
144 return X509V3_add_value(name, "TRUE", extlist);
148 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
150 BIGNUM *bntmp = NULL;
154 if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
155 !(strtmp = BN_bn2dec(bntmp)))
156 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
161 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
163 BIGNUM *bntmp = NULL;
167 if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
168 !(strtmp = BN_bn2dec(bntmp)))
169 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
174 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
181 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
185 if (value[0] == '-') {
191 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
198 ret = BN_hex2bn(&bn, value);
200 ret = BN_dec2bn(&bn, value);
202 if (!ret || value[ret]) {
204 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
208 if (isneg && BN_is_zero(bn))
211 aint = BN_to_ASN1_INTEGER(bn, NULL);
214 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
215 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
219 aint->type |= V_ASN1_NEG;
223 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
224 STACK_OF(CONF_VALUE) **extlist)
230 if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint)))
232 ret = X509V3_add_value(name, strtmp, extlist);
233 OPENSSL_free(strtmp);
237 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
240 if (!(btmp = value->value))
242 if (!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
243 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
244 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
247 } else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
248 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
249 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
254 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
255 X509V3_R_INVALID_BOOLEAN_STRING);
256 X509V3_conf_err(value);
260 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
263 if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
264 X509V3_conf_err(value);
278 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
282 STACK_OF(CONF_VALUE) *values = NULL;
285 /* We are going to modify the line so copy it first */
286 linebuf = BUF_strdup(line);
289 /* Go through all characters */
290 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
298 ntmp = strip_spaces(q);
300 X509V3err(X509V3_F_X509V3_PARSE_LIST,
301 X509V3_R_INVALID_NULL_NAME);
305 } else if (c == ',') {
307 ntmp = strip_spaces(q);
310 printf("%s\n", ntmp);
313 X509V3err(X509V3_F_X509V3_PARSE_LIST,
314 X509V3_R_INVALID_NULL_NAME);
317 X509V3_add_value(ntmp, NULL, &values);
325 vtmp = strip_spaces(q);
327 printf("%s\n", ntmp);
330 X509V3err(X509V3_F_X509V3_PARSE_LIST,
331 X509V3_R_INVALID_NULL_VALUE);
334 X509V3_add_value(ntmp, vtmp, &values);
342 if (state == HDR_VALUE) {
343 vtmp = strip_spaces(q);
345 printf("%s=%s\n", ntmp, vtmp);
348 X509V3err(X509V3_F_X509V3_PARSE_LIST,
349 X509V3_R_INVALID_NULL_VALUE);
352 X509V3_add_value(ntmp, vtmp, &values);
354 ntmp = strip_spaces(q);
356 printf("%s\n", ntmp);
359 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
362 X509V3_add_value(ntmp, NULL, &values);
364 OPENSSL_free(linebuf);
368 OPENSSL_free(linebuf);
369 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
374 /* Delete leading and trailing spaces from a string */
375 static char *strip_spaces(char *name)
378 /* Skip over leading spaces */
380 while (*p && isspace((unsigned char)*p))
384 q = p + strlen(p) - 1;
385 while ((q != p) && isspace((unsigned char)*q))
394 /* hex string utilities */
397 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
398 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
399 * on EBCDIC machines)
402 char *hex_to_string(unsigned char *buffer, long len)
407 const static char hexdig[] = "0123456789ABCDEF";
410 if (!(tmp = OPENSSL_malloc(len * 3 + 1))) {
411 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
415 for (i = 0, p = buffer; i < len; i++, p++) {
416 *q++ = hexdig[(*p >> 4) & 0xf];
417 *q++ = hexdig[*p & 0xf];
421 #ifdef CHARSET_EBCDIC
422 ebcdic2ascii(tmp, tmp, q - tmp - 1);
429 * Give a string of hex digits convert to a buffer
432 unsigned char *string_to_hex(char *str, long *len)
434 unsigned char *hexbuf, *q;
435 unsigned char ch, cl, *p;
437 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
440 if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1)))
442 for (p = (unsigned char *)str, q = hexbuf; *p;) {
444 #ifdef CHARSET_EBCDIC
445 ch = os_toebcdic[ch];
450 #ifdef CHARSET_EBCDIC
451 cl = os_toebcdic[cl];
454 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
455 OPENSSL_free(hexbuf);
463 if ((ch >= '0') && (ch <= '9'))
465 else if ((ch >= 'a') && (ch <= 'f'))
470 if ((cl >= '0') && (cl <= '9'))
472 else if ((cl >= 'a') && (cl <= 'f'))
477 *q++ = (ch << 4) | cl;
487 OPENSSL_free(hexbuf);
488 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
492 OPENSSL_free(hexbuf);
493 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
499 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
502 int name_cmp(const char *name, const char *cmp)
507 if ((ret = strncmp(name, cmp, len)))
510 if (!c || (c == '.'))
515 static int sk_strcmp(const char *const *a, const char *const *b)
517 return strcmp(*a, *b);
520 STACK *X509_get1_email(X509 *x)
524 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
525 ret = get_email(X509_get_subject_name(x), gens);
526 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
530 STACK *X509_get1_ocsp(X509 *x)
532 AUTHORITY_INFO_ACCESS *info;
535 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
538 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
539 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
540 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
541 if (ad->location->type == GEN_URI) {
543 (&ret, ad->location->d.uniformResourceIdentifier))
548 AUTHORITY_INFO_ACCESS_free(info);
552 STACK *X509_REQ_get1_email(X509_REQ *x)
555 STACK_OF(X509_EXTENSION) *exts;
557 exts = X509_REQ_get_extensions(x);
558 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
559 ret = get_email(X509_REQ_get_subject_name(x), gens);
560 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
561 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
565 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
569 ASN1_IA5STRING *email;
572 /* Now add any email address(es) to STACK */
574 /* First supplied X509_NAME */
575 while ((i = X509_NAME_get_index_by_NID(name,
576 NID_pkcs9_emailAddress, i)) >= 0) {
577 ne = X509_NAME_get_entry(name, i);
578 email = X509_NAME_ENTRY_get_data(ne);
579 if (!append_ia5(&ret, email))
582 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
583 gen = sk_GENERAL_NAME_value(gens, i);
584 if (gen->type != GEN_EMAIL)
586 if (!append_ia5(&ret, gen->d.ia5))
592 static void str_free(void *str)
597 static int append_ia5(STACK ** sk, ASN1_IA5STRING *email)
600 /* First some sanity checks */
601 if (email->type != V_ASN1_IA5STRING)
603 if (!email->data || !email->length)
606 *sk = sk_new(sk_strcmp);
609 /* Don't add duplicates */
610 if (sk_find(*sk, (char *)email->data) != -1)
612 emtmp = BUF_strdup((char *)email->data);
613 if (!emtmp || !sk_push(*sk, emtmp)) {
614 X509_email_free(*sk);
621 void X509_email_free(STACK * sk)
623 sk_pop_free(sk, str_free);
627 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
631 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
633 unsigned char ipout[16];
634 ASN1_OCTET_STRING *ret;
637 /* If string contains a ':' assume IPv6 */
639 iplen = a2i_ipadd(ipout, ipasc);
644 ret = ASN1_OCTET_STRING_new();
647 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
648 ASN1_OCTET_STRING_free(ret);
654 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
656 ASN1_OCTET_STRING *ret = NULL;
657 unsigned char ipout[32];
658 char *iptmp = NULL, *p;
660 p = strchr(ipasc, '/');
663 iptmp = BUF_strdup(ipasc);
666 p = iptmp + (p - ipasc);
669 iplen1 = a2i_ipadd(ipout, iptmp);
674 iplen2 = a2i_ipadd(ipout + iplen1, p);
679 if (!iplen2 || (iplen1 != iplen2))
682 ret = ASN1_OCTET_STRING_new();
685 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
694 ASN1_OCTET_STRING_free(ret);
698 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
700 /* If string contains a ':' assume IPv6 */
702 if (strchr(ipasc, ':')) {
703 if (!ipv6_from_asc(ipout, ipasc))
707 if (!ipv4_from_asc(ipout, ipasc))
713 static int ipv4_from_asc(unsigned char *v4, const char *in)
716 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
718 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
719 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
729 /* Temporary store for IPV6 output */
730 unsigned char tmp[16];
731 /* Total number of bytes in tmp */
733 /* The position of a zero (corresponding to '::') */
735 /* Number of zeroes */
739 static int ipv6_from_asc(unsigned char *v6, const char *in)
743 v6stat.zero_pos = -1;
746 * Treat the IPv6 representation as a list of values separated by ':'.
747 * The presence of a '::' will parse as one, two or three zero length
750 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
753 /* Now for some sanity checks */
755 if (v6stat.zero_pos == -1) {
756 /* If no '::' must have exactly 16 bytes */
757 if (v6stat.total != 16)
760 /* If '::' must have less than 16 bytes */
761 if (v6stat.total == 16)
763 /* More than three zeroes is an error */
764 if (v6stat.zero_cnt > 3)
766 /* Can only have three zeroes if nothing else present */
767 else if (v6stat.zero_cnt == 3) {
768 if (v6stat.total > 0)
771 /* Can only have two zeroes if at start or end */
772 else if (v6stat.zero_cnt == 2) {
773 if ((v6stat.zero_pos != 0)
774 && (v6stat.zero_pos != v6stat.total))
777 /* Can only have one zero if *not* start or end */
779 if ((v6stat.zero_pos == 0)
780 || (v6stat.zero_pos == v6stat.total))
787 if (v6stat.zero_pos >= 0) {
788 /* Copy initial part */
789 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
791 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
792 /* Copy final part */
793 if (v6stat.total != v6stat.zero_pos)
794 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
795 v6stat.tmp + v6stat.zero_pos,
796 v6stat.total - v6stat.zero_pos);
798 memcpy(v6, v6stat.tmp, 16);
803 static int ipv6_cb(const char *elem, int len, void *usr)
806 /* Error if 16 bytes written */
810 /* Zero length element, corresponds to '::' */
811 if (s->zero_pos == -1)
812 s->zero_pos = s->total;
813 /* If we've already got a :: its an error */
814 else if (s->zero_pos != s->total)
818 /* If more than 4 characters could be final a.b.c.d form */
820 /* Need at least 4 bytes left */
823 /* Must be end of string */
826 if (!ipv4_from_asc(s->tmp + s->total, elem))
830 if (!ipv6_hex(s->tmp + s->total, elem, len))
839 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
842 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
845 unsigned int num = 0;
851 if ((c >= '0') && (c <= '9'))
853 else if ((c >= 'A') && (c <= 'F'))
855 else if ((c >= 'a') && (c <= 'f'))
865 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
866 unsigned long chtype)
874 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
875 v = sk_CONF_VALUE_value(dn_sk, i);
878 * Skip past any leading X. X: X, etc to allow for multiple instances
880 for (p = type; *p; p++)
881 #ifndef CHARSET_EBCDIC
882 if ((*p == ':') || (*p == ',') || (*p == '.'))
884 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
885 || (*p == os_toascii['.']))
893 #ifndef CHARSET_EBCDIC
896 if (*type == os_toascii['+'])
903 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
904 (unsigned char *)v->value, -1, -1,