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(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);
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") || !strcmp(btmp, "true")
238 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
239 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
242 } else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
243 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
244 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
249 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
250 X509V3_R_INVALID_BOOLEAN_STRING);
251 X509V3_conf_err(value);
255 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
258 if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
259 X509V3_conf_err(value);
273 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
277 STACK_OF(CONF_VALUE) *values = NULL;
280 /* We are going to modify the line so copy it first */
281 linebuf = BUF_strdup(line);
284 /* Go through all characters */
285 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
293 ntmp = strip_spaces(q);
295 X509V3err(X509V3_F_X509V3_PARSE_LIST,
296 X509V3_R_INVALID_NULL_NAME);
300 } else if (c == ',') {
302 ntmp = strip_spaces(q);
305 X509V3err(X509V3_F_X509V3_PARSE_LIST,
306 X509V3_R_INVALID_NULL_NAME);
309 X509V3_add_value(ntmp, NULL, &values);
317 vtmp = strip_spaces(q);
319 X509V3err(X509V3_F_X509V3_PARSE_LIST,
320 X509V3_R_INVALID_NULL_VALUE);
323 X509V3_add_value(ntmp, vtmp, &values);
331 if (state == HDR_VALUE) {
332 vtmp = strip_spaces(q);
334 X509V3err(X509V3_F_X509V3_PARSE_LIST,
335 X509V3_R_INVALID_NULL_VALUE);
338 X509V3_add_value(ntmp, vtmp, &values);
340 ntmp = strip_spaces(q);
342 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
345 X509V3_add_value(ntmp, NULL, &values);
347 OPENSSL_free(linebuf);
351 OPENSSL_free(linebuf);
352 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
357 /* Delete leading and trailing spaces from a string */
358 static char *strip_spaces(char *name)
361 /* Skip over leading spaces */
363 while (*p && isspace((unsigned char)*p))
367 q = p + strlen(p) - 1;
368 while ((q != p) && isspace((unsigned char)*q))
377 /* hex string utilities */
380 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
381 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
382 * on EBCDIC machines)
385 char *hex_to_string(const unsigned char *buffer, long len)
388 const unsigned char *p;
390 const static char hexdig[] = "0123456789ABCDEF";
393 if (!(tmp = OPENSSL_malloc(len * 3 + 1))) {
394 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
398 for (i = 0, p = buffer; i < len; i++, p++) {
399 *q++ = hexdig[(*p >> 4) & 0xf];
400 *q++ = hexdig[*p & 0xf];
404 #ifdef CHARSET_EBCDIC
405 ebcdic2ascii(tmp, tmp, q - tmp - 1);
412 * Give a string of hex digits convert to a buffer
415 unsigned char *string_to_hex(const char *str, long *len)
417 unsigned char *hexbuf, *q;
418 unsigned char ch, cl, *p;
420 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
423 if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1)))
425 for (p = (unsigned char *)str, q = hexbuf; *p;) {
427 #ifdef CHARSET_EBCDIC
428 ch = os_toebcdic[ch];
433 #ifdef CHARSET_EBCDIC
434 cl = os_toebcdic[cl];
437 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
438 OPENSSL_free(hexbuf);
446 if ((ch >= '0') && (ch <= '9'))
448 else if ((ch >= 'a') && (ch <= 'f'))
453 if ((cl >= '0') && (cl <= '9'))
455 else if ((cl >= 'a') && (cl <= 'f'))
460 *q++ = (ch << 4) | cl;
469 OPENSSL_free(hexbuf);
470 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
474 OPENSSL_free(hexbuf);
475 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
481 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
484 int name_cmp(const char *name, const char *cmp)
489 if ((ret = strncmp(name, cmp, len)))
492 if (!c || (c == '.'))
497 static int sk_strcmp(const char *const *a, const char *const *b)
499 return strcmp(*a, *b);
502 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
505 STACK_OF(OPENSSL_STRING) *ret;
507 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
508 ret = get_email(X509_get_subject_name(x), gens);
509 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
513 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
515 AUTHORITY_INFO_ACCESS *info;
516 STACK_OF(OPENSSL_STRING) *ret = NULL;
519 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
522 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
523 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
524 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
525 if (ad->location->type == GEN_URI) {
527 (&ret, ad->location->d.uniformResourceIdentifier))
532 AUTHORITY_INFO_ACCESS_free(info);
536 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
539 STACK_OF(X509_EXTENSION) *exts;
540 STACK_OF(OPENSSL_STRING) *ret;
542 exts = X509_REQ_get_extensions(x);
543 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
544 ret = get_email(X509_REQ_get_subject_name(x), gens);
545 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
546 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
550 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
553 STACK_OF(OPENSSL_STRING) *ret = NULL;
555 ASN1_IA5STRING *email;
558 /* Now add any email address(es) to STACK */
560 /* First supplied X509_NAME */
561 while ((i = X509_NAME_get_index_by_NID(name,
562 NID_pkcs9_emailAddress, i)) >= 0) {
563 ne = X509_NAME_get_entry(name, i);
564 email = X509_NAME_ENTRY_get_data(ne);
565 if (!append_ia5(&ret, email))
568 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
569 gen = sk_GENERAL_NAME_value(gens, i);
570 if (gen->type != GEN_EMAIL)
572 if (!append_ia5(&ret, gen->d.ia5))
578 static void str_free(OPENSSL_STRING str)
583 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
586 /* First some sanity checks */
587 if (email->type != V_ASN1_IA5STRING)
589 if (!email->data || !email->length)
592 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
595 /* Don't add duplicates */
596 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
598 emtmp = BUF_strdup((char *)email->data);
599 if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
600 X509_email_free(*sk);
607 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
609 sk_OPENSSL_STRING_pop_free(sk, str_free);
612 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
613 const unsigned char *subject, size_t subject_len,
616 /* Skip pattern prefix to match "wildcard" subject */
617 static void skip_prefix(const unsigned char **p, size_t *plen,
618 const unsigned char *subject, size_t subject_len,
621 const unsigned char *pattern = *p;
622 size_t pattern_len = *plen;
625 * If subject starts with a leading '.' followed by more octets, and
626 * pattern is longer, compare just an equal-length suffix with the
627 * full subject (starting at the '.'), provided the prefix contains
630 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
633 while (pattern_len > subject_len && *pattern) {
634 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
641 /* Skip if entire prefix acceptable */
642 if (pattern_len == subject_len) {
648 /* Compare while ASCII ignoring case. */
649 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
650 const unsigned char *subject, size_t subject_len,
653 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
654 if (pattern_len != subject_len)
656 while (pattern_len) {
657 unsigned char l = *pattern;
658 unsigned char r = *subject;
659 /* The pattern must not contain NUL characters. */
663 if ('A' <= l && l <= 'Z')
665 if ('A' <= r && r <= 'Z')
677 /* Compare using memcmp. */
678 static int equal_case(const unsigned char *pattern, size_t pattern_len,
679 const unsigned char *subject, size_t subject_len,
682 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
683 if (pattern_len != subject_len)
685 return !memcmp(pattern, subject, pattern_len);
689 * RFC 5280, section 7.5, requires that only the domain is compared in a
690 * case-insensitive manner.
692 static int equal_email(const unsigned char *a, size_t a_len,
693 const unsigned char *b, size_t b_len,
694 unsigned int unused_flags)
700 * We search backwards for the '@' character, so that we do not have to
701 * deal with quoted local-parts. The domain part is compared in a
702 * case-insensitive manner.
706 if (a[i] == '@' || b[i] == '@') {
707 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
714 return equal_case(a, i, b, i, 0);
718 * Compare the prefix and suffix with the subject, and check that the
719 * characters in-between are valid.
721 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
722 const unsigned char *suffix, size_t suffix_len,
723 const unsigned char *subject, size_t subject_len,
726 const unsigned char *wildcard_start;
727 const unsigned char *wildcard_end;
728 const unsigned char *p;
732 if (subject_len < prefix_len + suffix_len)
734 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
736 wildcard_start = subject + prefix_len;
737 wildcard_end = subject + (subject_len - suffix_len);
738 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
741 * If the wildcard makes up the entire first label, it must match at
742 * least one character.
744 if (prefix_len == 0 && *suffix == '.') {
745 if (wildcard_start == wildcard_end)
748 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
751 /* IDNA labels cannot match partial wildcards */
753 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
755 /* The wildcard may match a literal '*' */
756 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
759 * Check that the part matched by the wildcard contains only
760 * permitted characters and only matches a single label unless
761 * allow_multi is set.
763 for (p = wildcard_start; p != wildcard_end; ++p)
764 if (!(('0' <= *p && *p <= '9') ||
765 ('A' <= *p && *p <= 'Z') ||
766 ('a' <= *p && *p <= 'z') ||
767 *p == '-' || (allow_multi && *p == '.')))
772 #define LABEL_START (1 << 0)
773 #define LABEL_END (1 << 1)
774 #define LABEL_HYPHEN (1 << 2)
775 #define LABEL_IDNA (1 << 3)
777 static const unsigned char *valid_star(const unsigned char *p, size_t len,
780 const unsigned char *star = 0;
782 int state = LABEL_START;
784 for (i = 0; i < len; ++i) {
786 * Locate first and only legal wildcard, either at the start
787 * or end of a non-IDNA first and not final label.
790 int atstart = (state & LABEL_START);
791 int atend = (i == len - 1 || p[i + i] == '.');
793 * At most one wildcard per pattern.
794 * No wildcards in IDNA labels.
795 * No wildcards after the first label.
797 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
799 /* Only full-label '*.example.com' wildcards? */
800 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
801 && (!atstart || !atend))
803 /* No 'foo*bar' wildcards */
804 if (!atstart && !atend)
807 state &= ~LABEL_START;
808 } else if (('a' <= p[i] && p[i] <= 'z')
809 || ('A' <= p[i] && p[i] <= 'Z')
810 || ('0' <= p[i] && p[i] <= '9')) {
811 if ((state & LABEL_START) != 0
812 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
814 state &= ~(LABEL_HYPHEN | LABEL_START);
815 } else if (p[i] == '.') {
816 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
820 } else if (p[i] == '-') {
821 if ((state & LABEL_HYPHEN) != 0)
823 state |= LABEL_HYPHEN;
829 * The final label must not end in a hyphen or ".", and
830 * there must be at least two dots after the star.
832 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
837 /* Compare using wildcards. */
838 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
839 const unsigned char *subject, size_t subject_len,
842 const unsigned char *star = NULL;
845 * Subject names starting with '.' can only match a wildcard pattern
846 * via a subject sub-domain pattern suffix match.
848 if (!(subject_len > 1 && subject[0] == '.'))
849 star = valid_star(pattern, pattern_len, flags);
851 return equal_nocase(pattern, pattern_len,
852 subject, subject_len, flags);
853 return wildcard_match(pattern, star - pattern,
854 star + 1, (pattern + pattern_len) - star - 1,
855 subject, subject_len, flags);
859 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
860 * cmp_type > 0 only compare if string matches the type, otherwise convert it
864 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
865 unsigned int flags, const char *b, size_t blen,
870 if (!a->data || !a->length)
873 if (cmp_type != a->type)
875 if (cmp_type == V_ASN1_IA5STRING)
876 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
877 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
879 if (rv > 0 && peername)
880 *peername = BUF_strndup((char *)a->data, a->length);
884 astrlen = ASN1_STRING_to_UTF8(&astr, a);
887 * -1 could be an internal malloc failure or a decoding error from
888 * malformed input; we can't distinguish.
892 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
893 if (rv > 0 && peername)
894 *peername = BUF_strndup((char *)astr, astrlen);
900 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
901 unsigned int flags, int check_type, char **peername)
903 GENERAL_NAMES *gens = NULL;
904 X509_NAME *name = NULL;
912 /* See below, this flag is internal-only */
913 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
914 if (check_type == GEN_EMAIL) {
915 cnid = NID_pkcs9_emailAddress;
916 alt_type = V_ASN1_IA5STRING;
918 } else if (check_type == GEN_DNS) {
919 cnid = NID_commonName;
920 /* Implicit client-side DNS sub-domain pattern */
921 if (chklen > 1 && chk[0] == '.')
922 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
923 alt_type = V_ASN1_IA5STRING;
924 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
925 equal = equal_nocase;
927 equal = equal_wildcard;
930 alt_type = V_ASN1_OCTET_STRING;
935 chklen = strlen(chk);
937 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
939 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
942 gen = sk_GENERAL_NAME_value(gens, i);
943 if (gen->type != check_type)
946 if (check_type == GEN_EMAIL)
947 cstr = gen->d.rfc822Name;
948 else if (check_type == GEN_DNS)
949 cstr = gen->d.dNSName;
951 cstr = gen->d.iPAddress;
952 /* Positive on success, negative on error! */
953 if ((rv = do_check_string(cstr, alt_type, equal, flags,
954 chk, chklen, peername)) != 0)
957 GENERAL_NAMES_free(gens);
962 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
966 name = X509_get_subject_name(x);
967 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
970 ne = X509_NAME_get_entry(name, i);
971 str = X509_NAME_ENTRY_get_data(ne);
972 /* Positive on success, negative on error! */
973 if ((rv = do_check_string(str, -1, equal, flags,
974 chk, chklen, peername)) != 0)
980 int X509_check_host(X509 *x, const char *chk, size_t chklen,
981 unsigned int flags, char **peername)
986 * Embedded NULs are disallowed, except as the last character of a
987 * string of length 2 or more (tolerate caller including terminating
988 * NUL in string length).
991 chklen = strlen(chk);
992 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
994 if (chklen > 1 && chk[chklen - 1] == '\0')
996 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
999 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1005 * Embedded NULs are disallowed, except as the last character of a
1006 * string of length 2 or more (tolerate caller including terminating
1007 * NUL in string length).
1010 chklen = strlen((char *)chk);
1011 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1013 if (chklen > 1 && chk[chklen - 1] == '\0')
1015 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1018 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1023 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1026 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1028 unsigned char ipout[16];
1033 iplen = (size_t)a2i_ipadd(ipout, ipasc);
1036 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1040 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1044 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1046 unsigned char ipout[16];
1047 ASN1_OCTET_STRING *ret;
1050 /* If string contains a ':' assume IPv6 */
1052 iplen = a2i_ipadd(ipout, ipasc);
1057 ret = ASN1_OCTET_STRING_new();
1060 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1061 ASN1_OCTET_STRING_free(ret);
1067 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1069 ASN1_OCTET_STRING *ret = NULL;
1070 unsigned char ipout[32];
1071 char *iptmp = NULL, *p;
1073 p = strchr(ipasc, '/');
1076 iptmp = BUF_strdup(ipasc);
1079 p = iptmp + (p - ipasc);
1082 iplen1 = a2i_ipadd(ipout, iptmp);
1087 iplen2 = a2i_ipadd(ipout + iplen1, p);
1089 OPENSSL_free(iptmp);
1092 if (!iplen2 || (iplen1 != iplen2))
1095 ret = ASN1_OCTET_STRING_new();
1098 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1104 OPENSSL_free(iptmp);
1105 ASN1_OCTET_STRING_free(ret);
1109 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1111 /* If string contains a ':' assume IPv6 */
1113 if (strchr(ipasc, ':')) {
1114 if (!ipv6_from_asc(ipout, ipasc))
1118 if (!ipv4_from_asc(ipout, ipasc))
1124 static int ipv4_from_asc(unsigned char *v4, const char *in)
1127 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1129 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1130 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1140 /* Temporary store for IPV6 output */
1141 unsigned char tmp[16];
1142 /* Total number of bytes in tmp */
1144 /* The position of a zero (corresponding to '::') */
1146 /* Number of zeroes */
1150 static int ipv6_from_asc(unsigned char *v6, const char *in)
1154 v6stat.zero_pos = -1;
1155 v6stat.zero_cnt = 0;
1157 * Treat the IPv6 representation as a list of values separated by ':'.
1158 * The presence of a '::' will parse as one, two or three zero length
1161 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1164 /* Now for some sanity checks */
1166 if (v6stat.zero_pos == -1) {
1167 /* If no '::' must have exactly 16 bytes */
1168 if (v6stat.total != 16)
1171 /* If '::' must have less than 16 bytes */
1172 if (v6stat.total == 16)
1174 /* More than three zeroes is an error */
1175 if (v6stat.zero_cnt > 3)
1177 /* Can only have three zeroes if nothing else present */
1178 else if (v6stat.zero_cnt == 3) {
1179 if (v6stat.total > 0)
1182 /* Can only have two zeroes if at start or end */
1183 else if (v6stat.zero_cnt == 2) {
1184 if ((v6stat.zero_pos != 0)
1185 && (v6stat.zero_pos != v6stat.total))
1188 /* Can only have one zero if *not* start or end */
1190 if ((v6stat.zero_pos == 0)
1191 || (v6stat.zero_pos == v6stat.total))
1198 if (v6stat.zero_pos >= 0) {
1199 /* Copy initial part */
1200 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1202 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1203 /* Copy final part */
1204 if (v6stat.total != v6stat.zero_pos)
1205 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1206 v6stat.tmp + v6stat.zero_pos,
1207 v6stat.total - v6stat.zero_pos);
1209 memcpy(v6, v6stat.tmp, 16);
1214 static int ipv6_cb(const char *elem, int len, void *usr)
1217 /* Error if 16 bytes written */
1221 /* Zero length element, corresponds to '::' */
1222 if (s->zero_pos == -1)
1223 s->zero_pos = s->total;
1224 /* If we've already got a :: its an error */
1225 else if (s->zero_pos != s->total)
1229 /* If more than 4 characters could be final a.b.c.d form */
1231 /* Need at least 4 bytes left */
1234 /* Must be end of string */
1237 if (!ipv4_from_asc(s->tmp + s->total, elem))
1241 if (!ipv6_hex(s->tmp + s->total, elem, len))
1250 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1253 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1256 unsigned int num = 0;
1262 if ((c >= '0') && (c <= '9'))
1264 else if ((c >= 'A') && (c <= 'F'))
1265 num |= c - 'A' + 10;
1266 else if ((c >= 'a') && (c <= 'f'))
1267 num |= c - 'a' + 10;
1272 out[1] = num & 0xff;
1276 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1277 unsigned long chtype)
1285 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1286 v = sk_CONF_VALUE_value(dn_sk, i);
1289 * Skip past any leading X. X: X, etc to allow for multiple instances
1291 for (p = type; *p; p++)
1292 #ifndef CHARSET_EBCDIC
1293 if ((*p == ':') || (*p == ',') || (*p == '.'))
1295 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
1296 || (*p == os_toascii['.']))
1304 #ifndef CHARSET_EBCDIC
1307 if (*type == os_toascii['+'])
1314 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1315 (unsigned char *)v->value, -1, -1,