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;
88 if (name && (tname = BUF_strdup(name)) == NULL)
90 if (value && (tvalue = BUF_strdup(value)) == NULL)
92 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
94 if (*extlist == NULL && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
99 if (!sk_CONF_VALUE_push(*extlist, vtmp))
103 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
106 OPENSSL_free(tvalue);
110 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
111 STACK_OF(CONF_VALUE) **extlist)
113 return X509V3_add_value(name, (const char *)value, extlist);
116 /* Free function for STACK_OF(CONF_VALUE) */
118 void X509V3_conf_free(CONF_VALUE *conf)
122 OPENSSL_free(conf->name);
123 OPENSSL_free(conf->value);
124 OPENSSL_free(conf->section);
128 int X509V3_add_value_bool(const char *name, int asn1_bool,
129 STACK_OF(CONF_VALUE) **extlist)
132 return X509V3_add_value(name, "TRUE", extlist);
133 return X509V3_add_value(name, "FALSE", extlist);
136 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
137 STACK_OF(CONF_VALUE) **extlist)
140 return X509V3_add_value(name, "TRUE", extlist);
144 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
146 BIGNUM *bntmp = NULL;
151 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
152 || (strtmp = BN_bn2dec(bntmp)) == NULL)
153 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
158 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
160 BIGNUM *bntmp = NULL;
165 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
166 || (strtmp = BN_bn2dec(bntmp)) == NULL)
167 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
172 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
179 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
183 if (value[0] == '-') {
189 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
196 ret = BN_hex2bn(&bn, value);
198 ret = BN_dec2bn(&bn, value);
200 if (!ret || value[ret]) {
202 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
206 if (isneg && BN_is_zero(bn))
209 aint = BN_to_ASN1_INTEGER(bn, NULL);
212 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
213 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
217 aint->type |= V_ASN1_NEG;
221 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
222 STACK_OF(CONF_VALUE) **extlist)
229 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
231 ret = X509V3_add_value(name, strtmp, extlist);
232 OPENSSL_free(strtmp);
236 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
240 if ((btmp = value->value) == NULL)
242 if (strcmp(btmp, "TRUE") == 0
243 || strcmp(btmp, "true") == 0
244 || strcmp(btmp, "Y") == 0
245 || strcmp(btmp, "y") == 0
246 || strcmp(btmp, "YES") == 0
247 || strcmp(btmp, "yes") == 0) {
251 if (strcmp(btmp, "FALSE") == 0
252 || strcmp(btmp, "false") == 0
253 || strcmp(btmp, "N") == 0
254 || strcmp(btmp, "n") == 0
255 || strcmp(btmp, "NO") == 0
256 || strcmp(btmp, "no") == 0) {
261 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
262 X509V3_R_INVALID_BOOLEAN_STRING);
263 X509V3_conf_err(value);
267 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
271 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
272 X509V3_conf_err(value);
286 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
290 STACK_OF(CONF_VALUE) *values = NULL;
293 /* We are going to modify the line so copy it first */
294 linebuf = BUF_strdup(line);
295 if (linebuf == NULL) {
296 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
301 /* Go through all characters */
302 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
310 ntmp = strip_spaces(q);
312 X509V3err(X509V3_F_X509V3_PARSE_LIST,
313 X509V3_R_INVALID_NULL_NAME);
317 } else if (c == ',') {
319 ntmp = strip_spaces(q);
322 X509V3err(X509V3_F_X509V3_PARSE_LIST,
323 X509V3_R_INVALID_NULL_NAME);
326 X509V3_add_value(ntmp, NULL, &values);
334 vtmp = strip_spaces(q);
336 X509V3err(X509V3_F_X509V3_PARSE_LIST,
337 X509V3_R_INVALID_NULL_VALUE);
340 X509V3_add_value(ntmp, vtmp, &values);
348 if (state == HDR_VALUE) {
349 vtmp = strip_spaces(q);
351 X509V3err(X509V3_F_X509V3_PARSE_LIST,
352 X509V3_R_INVALID_NULL_VALUE);
355 X509V3_add_value(ntmp, vtmp, &values);
357 ntmp = strip_spaces(q);
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(const unsigned char *buffer, long len)
405 const unsigned char *p;
407 const static char hexdig[] = "0123456789ABCDEF";
410 if ((tmp = OPENSSL_malloc(len * 3 + 1)) == NULL) {
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(const 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)) == NULL)
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;
486 OPENSSL_free(hexbuf);
487 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
491 OPENSSL_free(hexbuf);
492 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
498 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
501 int name_cmp(const char *name, const char *cmp)
506 if ((ret = strncmp(name, cmp, len)))
509 if (!c || (c == '.'))
514 static int sk_strcmp(const char *const *a, const char *const *b)
516 return strcmp(*a, *b);
519 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
522 STACK_OF(OPENSSL_STRING) *ret;
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_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
532 AUTHORITY_INFO_ACCESS *info;
533 STACK_OF(OPENSSL_STRING) *ret = NULL;
536 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
539 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
540 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
541 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
542 if (ad->location->type == GEN_URI) {
544 (&ret, ad->location->d.uniformResourceIdentifier))
549 AUTHORITY_INFO_ACCESS_free(info);
553 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
556 STACK_OF(X509_EXTENSION) *exts;
557 STACK_OF(OPENSSL_STRING) *ret;
559 exts = X509_REQ_get_extensions(x);
560 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
561 ret = get_email(X509_REQ_get_subject_name(x), gens);
562 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
563 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
567 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
570 STACK_OF(OPENSSL_STRING) *ret = NULL;
572 ASN1_IA5STRING *email;
575 /* Now add any email address(es) to STACK */
577 /* First supplied X509_NAME */
578 while ((i = X509_NAME_get_index_by_NID(name,
579 NID_pkcs9_emailAddress, i)) >= 0) {
580 ne = X509_NAME_get_entry(name, i);
581 email = X509_NAME_ENTRY_get_data(ne);
582 if (!append_ia5(&ret, email))
585 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
586 gen = sk_GENERAL_NAME_value(gens, i);
587 if (gen->type != GEN_EMAIL)
589 if (!append_ia5(&ret, gen->d.ia5))
595 static void str_free(OPENSSL_STRING str)
600 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
603 /* First some sanity checks */
604 if (email->type != V_ASN1_IA5STRING)
606 if (!email->data || !email->length)
609 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
612 /* Don't add duplicates */
613 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
615 emtmp = BUF_strdup((char *)email->data);
616 if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
617 X509_email_free(*sk);
624 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
626 sk_OPENSSL_STRING_pop_free(sk, str_free);
629 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
630 const unsigned char *subject, size_t subject_len,
633 /* Skip pattern prefix to match "wildcard" subject */
634 static void skip_prefix(const unsigned char **p, size_t *plen,
635 const unsigned char *subject, size_t subject_len,
638 const unsigned char *pattern = *p;
639 size_t pattern_len = *plen;
642 * If subject starts with a leading '.' followed by more octets, and
643 * pattern is longer, compare just an equal-length suffix with the
644 * full subject (starting at the '.'), provided the prefix contains
647 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
650 while (pattern_len > subject_len && *pattern) {
651 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
658 /* Skip if entire prefix acceptable */
659 if (pattern_len == subject_len) {
665 /* Compare while ASCII ignoring case. */
666 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
667 const unsigned char *subject, size_t subject_len,
670 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
671 if (pattern_len != subject_len)
673 while (pattern_len) {
674 unsigned char l = *pattern;
675 unsigned char r = *subject;
676 /* The pattern must not contain NUL characters. */
680 if ('A' <= l && l <= 'Z')
682 if ('A' <= r && r <= 'Z')
694 /* Compare using memcmp. */
695 static int equal_case(const unsigned char *pattern, size_t pattern_len,
696 const unsigned char *subject, size_t subject_len,
699 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
700 if (pattern_len != subject_len)
702 return !memcmp(pattern, subject, pattern_len);
706 * RFC 5280, section 7.5, requires that only the domain is compared in a
707 * case-insensitive manner.
709 static int equal_email(const unsigned char *a, size_t a_len,
710 const unsigned char *b, size_t b_len,
711 unsigned int unused_flags)
717 * We search backwards for the '@' character, so that we do not have to
718 * deal with quoted local-parts. The domain part is compared in a
719 * case-insensitive manner.
723 if (a[i] == '@' || b[i] == '@') {
724 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
731 return equal_case(a, i, b, i, 0);
735 * Compare the prefix and suffix with the subject, and check that the
736 * characters in-between are valid.
738 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
739 const unsigned char *suffix, size_t suffix_len,
740 const unsigned char *subject, size_t subject_len,
743 const unsigned char *wildcard_start;
744 const unsigned char *wildcard_end;
745 const unsigned char *p;
749 if (subject_len < prefix_len + suffix_len)
751 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
753 wildcard_start = subject + prefix_len;
754 wildcard_end = subject + (subject_len - suffix_len);
755 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
758 * If the wildcard makes up the entire first label, it must match at
759 * least one character.
761 if (prefix_len == 0 && *suffix == '.') {
762 if (wildcard_start == wildcard_end)
765 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
768 /* IDNA labels cannot match partial wildcards */
770 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
772 /* The wildcard may match a literal '*' */
773 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
776 * Check that the part matched by the wildcard contains only
777 * permitted characters and only matches a single label unless
778 * allow_multi is set.
780 for (p = wildcard_start; p != wildcard_end; ++p)
781 if (!(('0' <= *p && *p <= '9') ||
782 ('A' <= *p && *p <= 'Z') ||
783 ('a' <= *p && *p <= 'z') ||
784 *p == '-' || (allow_multi && *p == '.')))
789 #define LABEL_START (1 << 0)
790 #define LABEL_END (1 << 1)
791 #define LABEL_HYPHEN (1 << 2)
792 #define LABEL_IDNA (1 << 3)
794 static const unsigned char *valid_star(const unsigned char *p, size_t len,
797 const unsigned char *star = 0;
799 int state = LABEL_START;
801 for (i = 0; i < len; ++i) {
803 * Locate first and only legal wildcard, either at the start
804 * or end of a non-IDNA first and not final label.
807 int atstart = (state & LABEL_START);
808 int atend = (i == len - 1 || p[i + 1] == '.');
810 * At most one wildcard per pattern.
811 * No wildcards in IDNA labels.
812 * No wildcards after the first label.
814 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
816 /* Only full-label '*.example.com' wildcards? */
817 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
818 && (!atstart || !atend))
820 /* No 'foo*bar' wildcards */
821 if (!atstart && !atend)
824 state &= ~LABEL_START;
825 } else if (('a' <= p[i] && p[i] <= 'z')
826 || ('A' <= p[i] && p[i] <= 'Z')
827 || ('0' <= p[i] && p[i] <= '9')) {
828 if ((state & LABEL_START) != 0
829 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
831 state &= ~(LABEL_HYPHEN | LABEL_START);
832 } else if (p[i] == '.') {
833 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
837 } else if (p[i] == '-') {
838 if ((state & LABEL_HYPHEN) != 0)
840 state |= LABEL_HYPHEN;
846 * The final label must not end in a hyphen or ".", and
847 * there must be at least two dots after the star.
849 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
854 /* Compare using wildcards. */
855 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
856 const unsigned char *subject, size_t subject_len,
859 const unsigned char *star = NULL;
862 * Subject names starting with '.' can only match a wildcard pattern
863 * via a subject sub-domain pattern suffix match.
865 if (!(subject_len > 1 && subject[0] == '.'))
866 star = valid_star(pattern, pattern_len, flags);
868 return equal_nocase(pattern, pattern_len,
869 subject, subject_len, flags);
870 return wildcard_match(pattern, star - pattern,
871 star + 1, (pattern + pattern_len) - star - 1,
872 subject, subject_len, flags);
876 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
877 * cmp_type > 0 only compare if string matches the type, otherwise convert it
881 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
882 unsigned int flags, const char *b, size_t blen,
887 if (!a->data || !a->length)
890 if (cmp_type != a->type)
892 if (cmp_type == V_ASN1_IA5STRING)
893 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
894 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
896 if (rv > 0 && peername)
897 *peername = BUF_strndup((char *)a->data, a->length);
901 astrlen = ASN1_STRING_to_UTF8(&astr, a);
904 * -1 could be an internal malloc failure or a decoding error from
905 * malformed input; we can't distinguish.
909 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
910 if (rv > 0 && peername)
911 *peername = BUF_strndup((char *)astr, astrlen);
917 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
918 unsigned int flags, int check_type, char **peername)
920 GENERAL_NAMES *gens = NULL;
921 X509_NAME *name = NULL;
929 /* See below, this flag is internal-only */
930 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
931 if (check_type == GEN_EMAIL) {
932 cnid = NID_pkcs9_emailAddress;
933 alt_type = V_ASN1_IA5STRING;
935 } else if (check_type == GEN_DNS) {
936 cnid = NID_commonName;
937 /* Implicit client-side DNS sub-domain pattern */
938 if (chklen > 1 && chk[0] == '.')
939 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
940 alt_type = V_ASN1_IA5STRING;
941 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
942 equal = equal_nocase;
944 equal = equal_wildcard;
947 alt_type = V_ASN1_OCTET_STRING;
952 chklen = strlen(chk);
954 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
956 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
959 gen = sk_GENERAL_NAME_value(gens, i);
960 if (gen->type != check_type)
963 if (check_type == GEN_EMAIL)
964 cstr = gen->d.rfc822Name;
965 else if (check_type == GEN_DNS)
966 cstr = gen->d.dNSName;
968 cstr = gen->d.iPAddress;
969 /* Positive on success, negative on error! */
970 if ((rv = do_check_string(cstr, alt_type, equal, flags,
971 chk, chklen, peername)) != 0)
974 GENERAL_NAMES_free(gens);
979 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
983 name = X509_get_subject_name(x);
984 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
987 ne = X509_NAME_get_entry(name, i);
988 str = X509_NAME_ENTRY_get_data(ne);
989 /* Positive on success, negative on error! */
990 if ((rv = do_check_string(str, -1, equal, flags,
991 chk, chklen, peername)) != 0)
997 int X509_check_host(X509 *x, const char *chk, size_t chklen,
998 unsigned int flags, char **peername)
1003 * Embedded NULs are disallowed, except as the last character of a
1004 * string of length 2 or more (tolerate caller including terminating
1005 * NUL in string length).
1008 chklen = strlen(chk);
1009 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1011 if (chklen > 1 && chk[chklen - 1] == '\0')
1013 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
1016 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1022 * Embedded NULs are disallowed, except as the last character of a
1023 * string of length 2 or more (tolerate caller including terminating
1024 * NUL in string length).
1027 chklen = strlen((char *)chk);
1028 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1030 if (chklen > 1 && chk[chklen - 1] == '\0')
1032 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1035 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1040 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1043 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1045 unsigned char ipout[16];
1050 iplen = (size_t)a2i_ipadd(ipout, ipasc);
1053 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1057 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1061 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1063 unsigned char ipout[16];
1064 ASN1_OCTET_STRING *ret;
1067 /* If string contains a ':' assume IPv6 */
1069 iplen = a2i_ipadd(ipout, ipasc);
1074 ret = ASN1_OCTET_STRING_new();
1077 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1078 ASN1_OCTET_STRING_free(ret);
1084 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1086 ASN1_OCTET_STRING *ret = NULL;
1087 unsigned char ipout[32];
1088 char *iptmp = NULL, *p;
1090 p = strchr(ipasc, '/');
1093 iptmp = BUF_strdup(ipasc);
1096 p = iptmp + (p - ipasc);
1099 iplen1 = a2i_ipadd(ipout, iptmp);
1104 iplen2 = a2i_ipadd(ipout + iplen1, p);
1106 OPENSSL_free(iptmp);
1109 if (!iplen2 || (iplen1 != iplen2))
1112 ret = ASN1_OCTET_STRING_new();
1115 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1121 OPENSSL_free(iptmp);
1122 ASN1_OCTET_STRING_free(ret);
1126 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1128 /* If string contains a ':' assume IPv6 */
1130 if (strchr(ipasc, ':')) {
1131 if (!ipv6_from_asc(ipout, ipasc))
1135 if (!ipv4_from_asc(ipout, ipasc))
1141 static int ipv4_from_asc(unsigned char *v4, const char *in)
1144 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1146 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1147 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1157 /* Temporary store for IPV6 output */
1158 unsigned char tmp[16];
1159 /* Total number of bytes in tmp */
1161 /* The position of a zero (corresponding to '::') */
1163 /* Number of zeroes */
1167 static int ipv6_from_asc(unsigned char *v6, const char *in)
1171 v6stat.zero_pos = -1;
1172 v6stat.zero_cnt = 0;
1174 * Treat the IPv6 representation as a list of values separated by ':'.
1175 * The presence of a '::' will parse as one, two or three zero length
1178 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1181 /* Now for some sanity checks */
1183 if (v6stat.zero_pos == -1) {
1184 /* If no '::' must have exactly 16 bytes */
1185 if (v6stat.total != 16)
1188 /* If '::' must have less than 16 bytes */
1189 if (v6stat.total == 16)
1191 /* More than three zeroes is an error */
1192 if (v6stat.zero_cnt > 3)
1194 /* Can only have three zeroes if nothing else present */
1195 else if (v6stat.zero_cnt == 3) {
1196 if (v6stat.total > 0)
1199 /* Can only have two zeroes if at start or end */
1200 else if (v6stat.zero_cnt == 2) {
1201 if ((v6stat.zero_pos != 0)
1202 && (v6stat.zero_pos != v6stat.total))
1205 /* Can only have one zero if *not* start or end */
1207 if ((v6stat.zero_pos == 0)
1208 || (v6stat.zero_pos == v6stat.total))
1215 if (v6stat.zero_pos >= 0) {
1216 /* Copy initial part */
1217 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1219 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1220 /* Copy final part */
1221 if (v6stat.total != v6stat.zero_pos)
1222 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1223 v6stat.tmp + v6stat.zero_pos,
1224 v6stat.total - v6stat.zero_pos);
1226 memcpy(v6, v6stat.tmp, 16);
1231 static int ipv6_cb(const char *elem, int len, void *usr)
1234 /* Error if 16 bytes written */
1238 /* Zero length element, corresponds to '::' */
1239 if (s->zero_pos == -1)
1240 s->zero_pos = s->total;
1241 /* If we've already got a :: its an error */
1242 else if (s->zero_pos != s->total)
1246 /* If more than 4 characters could be final a.b.c.d form */
1248 /* Need at least 4 bytes left */
1251 /* Must be end of string */
1254 if (!ipv4_from_asc(s->tmp + s->total, elem))
1258 if (!ipv6_hex(s->tmp + s->total, elem, len))
1267 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1270 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1273 unsigned int num = 0;
1279 if ((c >= '0') && (c <= '9'))
1281 else if ((c >= 'A') && (c <= 'F'))
1282 num |= c - 'A' + 10;
1283 else if ((c >= 'a') && (c <= 'f'))
1284 num |= c - 'a' + 10;
1289 out[1] = num & 0xff;
1293 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1294 unsigned long chtype)
1302 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1303 v = sk_CONF_VALUE_value(dn_sk, i);
1306 * Skip past any leading X. X: X, etc to allow for multiple instances
1308 for (p = type; *p; p++)
1309 #ifndef CHARSET_EBCDIC
1310 if ((*p == ':') || (*p == ',') || (*p == '.'))
1312 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
1313 || (*p == os_toascii['.']))
1321 #ifndef CHARSET_EBCDIC
1324 if (*type == os_toascii['+'])
1331 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1332 (unsigned char *)v->value, -1, -1,