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 = OPENSSL_malloc(sizeof(*vtmp))))
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);
105 OPENSSL_free(tvalue);
109 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
110 STACK_OF(CONF_VALUE) **extlist)
112 return X509V3_add_value(name, (const char *)value, extlist);
115 /* Free function for STACK_OF(CONF_VALUE) */
117 void X509V3_conf_free(CONF_VALUE *conf)
121 OPENSSL_free(conf->name);
122 OPENSSL_free(conf->value);
123 OPENSSL_free(conf->section);
127 int X509V3_add_value_bool(const char *name, int asn1_bool,
128 STACK_OF(CONF_VALUE) **extlist)
131 return X509V3_add_value(name, "TRUE", extlist);
132 return X509V3_add_value(name, "FALSE", extlist);
135 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
136 STACK_OF(CONF_VALUE) **extlist)
139 return X509V3_add_value(name, "TRUE", extlist);
143 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
145 BIGNUM *bntmp = NULL;
149 if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
150 !(strtmp = BN_bn2dec(bntmp)))
151 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
156 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
158 BIGNUM *bntmp = NULL;
162 if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
163 !(strtmp = BN_bn2dec(bntmp)))
164 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
169 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
176 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
180 if (value[0] == '-') {
186 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
193 ret = BN_hex2bn(&bn, value);
195 ret = BN_dec2bn(&bn, value);
197 if (!ret || value[ret]) {
199 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
203 if (isneg && BN_is_zero(bn))
206 aint = BN_to_ASN1_INTEGER(bn, NULL);
209 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
210 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
214 aint->type |= V_ASN1_NEG;
218 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
219 STACK_OF(CONF_VALUE) **extlist)
225 if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint)))
227 ret = X509V3_add_value(name, strtmp, extlist);
228 OPENSSL_free(strtmp);
232 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
235 if (!(btmp = value->value))
237 if (strcmp(btmp, "TRUE") == 0
238 || strcmp(btmp, "true") == 0
239 || strcmp(btmp, "Y") == 0
240 || strcmp(btmp, "y") == 0
241 || strcmp(btmp, "YES") == 0
242 || strcmp(btmp, "yes") == 0) {
246 if (strcmp(btmp, "FALSE") == 0
247 || strcmp(btmp, "false") == 0
248 || strcmp(btmp, "N") == 0
249 || strcmp(btmp, "n") == 0
250 || strcmp(btmp, "NO") == 0
251 || strcmp(btmp, "no") == 0) {
256 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
257 X509V3_R_INVALID_BOOLEAN_STRING);
258 X509V3_conf_err(value);
262 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
265 if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
266 X509V3_conf_err(value);
280 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
284 STACK_OF(CONF_VALUE) *values = NULL;
287 /* We are going to modify the line so copy it first */
288 linebuf = BUF_strdup(line);
289 if (linebuf == NULL) {
290 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
295 /* Go through all characters */
296 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
304 ntmp = strip_spaces(q);
306 X509V3err(X509V3_F_X509V3_PARSE_LIST,
307 X509V3_R_INVALID_NULL_NAME);
311 } else if (c == ',') {
313 ntmp = strip_spaces(q);
316 X509V3err(X509V3_F_X509V3_PARSE_LIST,
317 X509V3_R_INVALID_NULL_NAME);
320 X509V3_add_value(ntmp, NULL, &values);
328 vtmp = strip_spaces(q);
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 X509V3err(X509V3_F_X509V3_PARSE_LIST,
346 X509V3_R_INVALID_NULL_VALUE);
349 X509V3_add_value(ntmp, vtmp, &values);
351 ntmp = strip_spaces(q);
353 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
356 X509V3_add_value(ntmp, NULL, &values);
358 OPENSSL_free(linebuf);
362 OPENSSL_free(linebuf);
363 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
368 /* Delete leading and trailing spaces from a string */
369 static char *strip_spaces(char *name)
372 /* Skip over leading spaces */
374 while (*p && isspace((unsigned char)*p))
378 q = p + strlen(p) - 1;
379 while ((q != p) && isspace((unsigned char)*q))
388 /* hex string utilities */
391 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
392 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
393 * on EBCDIC machines)
396 char *hex_to_string(const unsigned char *buffer, long len)
399 const unsigned char *p;
401 const static char hexdig[] = "0123456789ABCDEF";
404 if (!(tmp = OPENSSL_malloc(len * 3 + 1))) {
405 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
409 for (i = 0, p = buffer; i < len; i++, p++) {
410 *q++ = hexdig[(*p >> 4) & 0xf];
411 *q++ = hexdig[*p & 0xf];
415 #ifdef CHARSET_EBCDIC
416 ebcdic2ascii(tmp, tmp, q - tmp - 1);
423 * Give a string of hex digits convert to a buffer
426 unsigned char *string_to_hex(const char *str, long *len)
428 unsigned char *hexbuf, *q;
429 unsigned char ch, cl, *p;
431 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
434 if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1)))
436 for (p = (unsigned char *)str, q = hexbuf; *p;) {
438 #ifdef CHARSET_EBCDIC
439 ch = os_toebcdic[ch];
444 #ifdef CHARSET_EBCDIC
445 cl = os_toebcdic[cl];
448 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
449 OPENSSL_free(hexbuf);
457 if ((ch >= '0') && (ch <= '9'))
459 else if ((ch >= 'a') && (ch <= 'f'))
464 if ((cl >= '0') && (cl <= '9'))
466 else if ((cl >= 'a') && (cl <= 'f'))
471 *q++ = (ch << 4) | cl;
480 OPENSSL_free(hexbuf);
481 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
485 OPENSSL_free(hexbuf);
486 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
492 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
495 int name_cmp(const char *name, const char *cmp)
500 if ((ret = strncmp(name, cmp, len)))
503 if (!c || (c == '.'))
508 static int sk_strcmp(const char *const *a, const char *const *b)
510 return strcmp(*a, *b);
513 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
516 STACK_OF(OPENSSL_STRING) *ret;
518 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
519 ret = get_email(X509_get_subject_name(x), gens);
520 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
524 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
526 AUTHORITY_INFO_ACCESS *info;
527 STACK_OF(OPENSSL_STRING) *ret = NULL;
530 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
533 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
534 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
535 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
536 if (ad->location->type == GEN_URI) {
538 (&ret, ad->location->d.uniformResourceIdentifier))
543 AUTHORITY_INFO_ACCESS_free(info);
547 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
550 STACK_OF(X509_EXTENSION) *exts;
551 STACK_OF(OPENSSL_STRING) *ret;
553 exts = X509_REQ_get_extensions(x);
554 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
555 ret = get_email(X509_REQ_get_subject_name(x), gens);
556 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
557 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
561 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
564 STACK_OF(OPENSSL_STRING) *ret = NULL;
566 ASN1_IA5STRING *email;
569 /* Now add any email address(es) to STACK */
571 /* First supplied X509_NAME */
572 while ((i = X509_NAME_get_index_by_NID(name,
573 NID_pkcs9_emailAddress, i)) >= 0) {
574 ne = X509_NAME_get_entry(name, i);
575 email = X509_NAME_ENTRY_get_data(ne);
576 if (!append_ia5(&ret, email))
579 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
580 gen = sk_GENERAL_NAME_value(gens, i);
581 if (gen->type != GEN_EMAIL)
583 if (!append_ia5(&ret, gen->d.ia5))
589 static void str_free(OPENSSL_STRING str)
594 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
597 /* First some sanity checks */
598 if (email->type != V_ASN1_IA5STRING)
600 if (!email->data || !email->length)
603 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
606 /* Don't add duplicates */
607 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
609 emtmp = BUF_strdup((char *)email->data);
610 if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
611 X509_email_free(*sk);
618 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
620 sk_OPENSSL_STRING_pop_free(sk, str_free);
623 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
624 const unsigned char *subject, size_t subject_len,
627 /* Skip pattern prefix to match "wildcard" subject */
628 static void skip_prefix(const unsigned char **p, size_t *plen,
629 const unsigned char *subject, size_t subject_len,
632 const unsigned char *pattern = *p;
633 size_t pattern_len = *plen;
636 * If subject starts with a leading '.' followed by more octets, and
637 * pattern is longer, compare just an equal-length suffix with the
638 * full subject (starting at the '.'), provided the prefix contains
641 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
644 while (pattern_len > subject_len && *pattern) {
645 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
652 /* Skip if entire prefix acceptable */
653 if (pattern_len == subject_len) {
659 /* Compare while ASCII ignoring case. */
660 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
661 const unsigned char *subject, size_t subject_len,
664 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
665 if (pattern_len != subject_len)
667 while (pattern_len) {
668 unsigned char l = *pattern;
669 unsigned char r = *subject;
670 /* The pattern must not contain NUL characters. */
674 if ('A' <= l && l <= 'Z')
676 if ('A' <= r && r <= 'Z')
688 /* Compare using memcmp. */
689 static int equal_case(const unsigned char *pattern, size_t pattern_len,
690 const unsigned char *subject, size_t subject_len,
693 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
694 if (pattern_len != subject_len)
696 return !memcmp(pattern, subject, pattern_len);
700 * RFC 5280, section 7.5, requires that only the domain is compared in a
701 * case-insensitive manner.
703 static int equal_email(const unsigned char *a, size_t a_len,
704 const unsigned char *b, size_t b_len,
705 unsigned int unused_flags)
711 * We search backwards for the '@' character, so that we do not have to
712 * deal with quoted local-parts. The domain part is compared in a
713 * case-insensitive manner.
717 if (a[i] == '@' || b[i] == '@') {
718 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
725 return equal_case(a, i, b, i, 0);
729 * Compare the prefix and suffix with the subject, and check that the
730 * characters in-between are valid.
732 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
733 const unsigned char *suffix, size_t suffix_len,
734 const unsigned char *subject, size_t subject_len,
737 const unsigned char *wildcard_start;
738 const unsigned char *wildcard_end;
739 const unsigned char *p;
743 if (subject_len < prefix_len + suffix_len)
745 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
747 wildcard_start = subject + prefix_len;
748 wildcard_end = subject + (subject_len - suffix_len);
749 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
752 * If the wildcard makes up the entire first label, it must match at
753 * least one character.
755 if (prefix_len == 0 && *suffix == '.') {
756 if (wildcard_start == wildcard_end)
759 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
762 /* IDNA labels cannot match partial wildcards */
764 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
766 /* The wildcard may match a literal '*' */
767 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
770 * Check that the part matched by the wildcard contains only
771 * permitted characters and only matches a single label unless
772 * allow_multi is set.
774 for (p = wildcard_start; p != wildcard_end; ++p)
775 if (!(('0' <= *p && *p <= '9') ||
776 ('A' <= *p && *p <= 'Z') ||
777 ('a' <= *p && *p <= 'z') ||
778 *p == '-' || (allow_multi && *p == '.')))
783 #define LABEL_START (1 << 0)
784 #define LABEL_END (1 << 1)
785 #define LABEL_HYPHEN (1 << 2)
786 #define LABEL_IDNA (1 << 3)
788 static const unsigned char *valid_star(const unsigned char *p, size_t len,
791 const unsigned char *star = 0;
793 int state = LABEL_START;
795 for (i = 0; i < len; ++i) {
797 * Locate first and only legal wildcard, either at the start
798 * or end of a non-IDNA first and not final label.
801 int atstart = (state & LABEL_START);
802 int atend = (i == len - 1 || p[i + 1] == '.');
804 * At most one wildcard per pattern.
805 * No wildcards in IDNA labels.
806 * No wildcards after the first label.
808 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
810 /* Only full-label '*.example.com' wildcards? */
811 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
812 && (!atstart || !atend))
814 /* No 'foo*bar' wildcards */
815 if (!atstart && !atend)
818 state &= ~LABEL_START;
819 } else if (('a' <= p[i] && p[i] <= 'z')
820 || ('A' <= p[i] && p[i] <= 'Z')
821 || ('0' <= p[i] && p[i] <= '9')) {
822 if ((state & LABEL_START) != 0
823 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
825 state &= ~(LABEL_HYPHEN | LABEL_START);
826 } else if (p[i] == '.') {
827 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
831 } else if (p[i] == '-') {
832 if ((state & LABEL_HYPHEN) != 0)
834 state |= LABEL_HYPHEN;
840 * The final label must not end in a hyphen or ".", and
841 * there must be at least two dots after the star.
843 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
848 /* Compare using wildcards. */
849 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
850 const unsigned char *subject, size_t subject_len,
853 const unsigned char *star = NULL;
856 * Subject names starting with '.' can only match a wildcard pattern
857 * via a subject sub-domain pattern suffix match.
859 if (!(subject_len > 1 && subject[0] == '.'))
860 star = valid_star(pattern, pattern_len, flags);
862 return equal_nocase(pattern, pattern_len,
863 subject, subject_len, flags);
864 return wildcard_match(pattern, star - pattern,
865 star + 1, (pattern + pattern_len) - star - 1,
866 subject, subject_len, flags);
870 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
871 * cmp_type > 0 only compare if string matches the type, otherwise convert it
875 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
876 unsigned int flags, const char *b, size_t blen,
881 if (!a->data || !a->length)
884 if (cmp_type != a->type)
886 if (cmp_type == V_ASN1_IA5STRING)
887 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
888 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
890 if (rv > 0 && peername)
891 *peername = BUF_strndup((char *)a->data, a->length);
895 astrlen = ASN1_STRING_to_UTF8(&astr, a);
898 * -1 could be an internal malloc failure or a decoding error from
899 * malformed input; we can't distinguish.
903 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
904 if (rv > 0 && peername)
905 *peername = BUF_strndup((char *)astr, astrlen);
911 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
912 unsigned int flags, int check_type, char **peername)
914 GENERAL_NAMES *gens = NULL;
915 X509_NAME *name = NULL;
923 /* See below, this flag is internal-only */
924 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
925 if (check_type == GEN_EMAIL) {
926 cnid = NID_pkcs9_emailAddress;
927 alt_type = V_ASN1_IA5STRING;
929 } else if (check_type == GEN_DNS) {
930 cnid = NID_commonName;
931 /* Implicit client-side DNS sub-domain pattern */
932 if (chklen > 1 && chk[0] == '.')
933 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
934 alt_type = V_ASN1_IA5STRING;
935 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
936 equal = equal_nocase;
938 equal = equal_wildcard;
941 alt_type = V_ASN1_OCTET_STRING;
946 chklen = strlen(chk);
948 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
950 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
953 gen = sk_GENERAL_NAME_value(gens, i);
954 if (gen->type != check_type)
957 if (check_type == GEN_EMAIL)
958 cstr = gen->d.rfc822Name;
959 else if (check_type == GEN_DNS)
960 cstr = gen->d.dNSName;
962 cstr = gen->d.iPAddress;
963 /* Positive on success, negative on error! */
964 if ((rv = do_check_string(cstr, alt_type, equal, flags,
965 chk, chklen, peername)) != 0)
968 GENERAL_NAMES_free(gens);
973 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
977 name = X509_get_subject_name(x);
978 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
981 ne = X509_NAME_get_entry(name, i);
982 str = X509_NAME_ENTRY_get_data(ne);
983 /* Positive on success, negative on error! */
984 if ((rv = do_check_string(str, -1, equal, flags,
985 chk, chklen, peername)) != 0)
991 int X509_check_host(X509 *x, const char *chk, size_t chklen,
992 unsigned int flags, char **peername)
997 * Embedded NULs are disallowed, except as the last character of a
998 * string of length 2 or more (tolerate caller including terminating
999 * NUL in string length).
1002 chklen = strlen(chk);
1003 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1005 if (chklen > 1 && chk[chklen - 1] == '\0')
1007 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
1010 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1016 * Embedded NULs are disallowed, except as the last character of a
1017 * string of length 2 or more (tolerate caller including terminating
1018 * NUL in string length).
1021 chklen = strlen((char *)chk);
1022 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1024 if (chklen > 1 && chk[chklen - 1] == '\0')
1026 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1029 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1034 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1037 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1039 unsigned char ipout[16];
1044 iplen = (size_t)a2i_ipadd(ipout, ipasc);
1047 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1051 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1055 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1057 unsigned char ipout[16];
1058 ASN1_OCTET_STRING *ret;
1061 /* If string contains a ':' assume IPv6 */
1063 iplen = a2i_ipadd(ipout, ipasc);
1068 ret = ASN1_OCTET_STRING_new();
1071 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1072 ASN1_OCTET_STRING_free(ret);
1078 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1080 ASN1_OCTET_STRING *ret = NULL;
1081 unsigned char ipout[32];
1082 char *iptmp = NULL, *p;
1084 p = strchr(ipasc, '/');
1087 iptmp = BUF_strdup(ipasc);
1090 p = iptmp + (p - ipasc);
1093 iplen1 = a2i_ipadd(ipout, iptmp);
1098 iplen2 = a2i_ipadd(ipout + iplen1, p);
1100 OPENSSL_free(iptmp);
1103 if (!iplen2 || (iplen1 != iplen2))
1106 ret = ASN1_OCTET_STRING_new();
1109 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1115 OPENSSL_free(iptmp);
1116 ASN1_OCTET_STRING_free(ret);
1120 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1122 /* If string contains a ':' assume IPv6 */
1124 if (strchr(ipasc, ':')) {
1125 if (!ipv6_from_asc(ipout, ipasc))
1129 if (!ipv4_from_asc(ipout, ipasc))
1135 static int ipv4_from_asc(unsigned char *v4, const char *in)
1138 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1140 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1141 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1151 /* Temporary store for IPV6 output */
1152 unsigned char tmp[16];
1153 /* Total number of bytes in tmp */
1155 /* The position of a zero (corresponding to '::') */
1157 /* Number of zeroes */
1161 static int ipv6_from_asc(unsigned char *v6, const char *in)
1165 v6stat.zero_pos = -1;
1166 v6stat.zero_cnt = 0;
1168 * Treat the IPv6 representation as a list of values separated by ':'.
1169 * The presence of a '::' will parse as one, two or three zero length
1172 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1175 /* Now for some sanity checks */
1177 if (v6stat.zero_pos == -1) {
1178 /* If no '::' must have exactly 16 bytes */
1179 if (v6stat.total != 16)
1182 /* If '::' must have less than 16 bytes */
1183 if (v6stat.total == 16)
1185 /* More than three zeroes is an error */
1186 if (v6stat.zero_cnt > 3)
1188 /* Can only have three zeroes if nothing else present */
1189 else if (v6stat.zero_cnt == 3) {
1190 if (v6stat.total > 0)
1193 /* Can only have two zeroes if at start or end */
1194 else if (v6stat.zero_cnt == 2) {
1195 if ((v6stat.zero_pos != 0)
1196 && (v6stat.zero_pos != v6stat.total))
1199 /* Can only have one zero if *not* start or end */
1201 if ((v6stat.zero_pos == 0)
1202 || (v6stat.zero_pos == v6stat.total))
1209 if (v6stat.zero_pos >= 0) {
1210 /* Copy initial part */
1211 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1213 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1214 /* Copy final part */
1215 if (v6stat.total != v6stat.zero_pos)
1216 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1217 v6stat.tmp + v6stat.zero_pos,
1218 v6stat.total - v6stat.zero_pos);
1220 memcpy(v6, v6stat.tmp, 16);
1225 static int ipv6_cb(const char *elem, int len, void *usr)
1228 /* Error if 16 bytes written */
1232 /* Zero length element, corresponds to '::' */
1233 if (s->zero_pos == -1)
1234 s->zero_pos = s->total;
1235 /* If we've already got a :: its an error */
1236 else if (s->zero_pos != s->total)
1240 /* If more than 4 characters could be final a.b.c.d form */
1242 /* Need at least 4 bytes left */
1245 /* Must be end of string */
1248 if (!ipv4_from_asc(s->tmp + s->total, elem))
1252 if (!ipv6_hex(s->tmp + s->total, elem, len))
1261 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1264 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1267 unsigned int num = 0;
1273 if ((c >= '0') && (c <= '9'))
1275 else if ((c >= 'A') && (c <= 'F'))
1276 num |= c - 'A' + 10;
1277 else if ((c >= 'a') && (c <= 'f'))
1278 num |= c - 'a' + 10;
1283 out[1] = num & 0xff;
1287 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1288 unsigned long chtype)
1296 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1297 v = sk_CONF_VALUE_value(dn_sk, i);
1300 * Skip past any leading X. X: X, etc to allow for multiple instances
1302 for (p = type; *p; p++)
1303 #ifndef CHARSET_EBCDIC
1304 if ((*p == ':') || (*p == ',') || (*p == '.'))
1306 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
1307 || (*p == os_toascii['.']))
1315 #ifndef CHARSET_EBCDIC
1318 if (*type == os_toascii['+'])
1325 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1326 (unsigned char *)v->value, -1, -1,