2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
58 /* X509 v3 extension utilities */
62 #include "internal/cryptlib.h"
63 #include <openssl/conf.h>
64 #include <openssl/x509v3.h>
65 #include "internal/x509_int.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 = OPENSSL_strdup(name)) == NULL)
90 if (value && (tvalue = OPENSSL_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);
184 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
187 if (value[0] == '-') {
193 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
200 ret = BN_hex2bn(&bn, value);
202 ret = BN_dec2bn(&bn, value);
204 if (!ret || value[ret]) {
206 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
210 if (isneg && BN_is_zero(bn))
213 aint = BN_to_ASN1_INTEGER(bn, NULL);
216 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
217 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
221 aint->type |= V_ASN1_NEG;
225 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
226 STACK_OF(CONF_VALUE) **extlist)
233 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
235 ret = X509V3_add_value(name, strtmp, extlist);
236 OPENSSL_free(strtmp);
240 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
244 if ((btmp = value->value) == NULL)
246 if (strcmp(btmp, "TRUE") == 0
247 || strcmp(btmp, "true") == 0
248 || strcmp(btmp, "Y") == 0
249 || strcmp(btmp, "y") == 0
250 || strcmp(btmp, "YES") == 0
251 || strcmp(btmp, "yes") == 0) {
255 if (strcmp(btmp, "FALSE") == 0
256 || strcmp(btmp, "false") == 0
257 || strcmp(btmp, "N") == 0
258 || strcmp(btmp, "n") == 0
259 || strcmp(btmp, "NO") == 0
260 || strcmp(btmp, "no") == 0) {
265 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
266 X509V3_R_INVALID_BOOLEAN_STRING);
267 X509V3_conf_err(value);
271 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
275 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
276 X509V3_conf_err(value);
290 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
294 STACK_OF(CONF_VALUE) *values = NULL;
297 /* We are going to modify the line so copy it first */
298 linebuf = OPENSSL_strdup(line);
299 if (linebuf == NULL) {
300 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
305 /* Go through all characters */
306 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
314 ntmp = strip_spaces(q);
316 X509V3err(X509V3_F_X509V3_PARSE_LIST,
317 X509V3_R_INVALID_NULL_NAME);
321 } else if (c == ',') {
323 ntmp = strip_spaces(q);
326 X509V3err(X509V3_F_X509V3_PARSE_LIST,
327 X509V3_R_INVALID_NULL_NAME);
330 X509V3_add_value(ntmp, NULL, &values);
338 vtmp = strip_spaces(q);
340 X509V3err(X509V3_F_X509V3_PARSE_LIST,
341 X509V3_R_INVALID_NULL_VALUE);
344 X509V3_add_value(ntmp, vtmp, &values);
352 if (state == HDR_VALUE) {
353 vtmp = strip_spaces(q);
355 X509V3err(X509V3_F_X509V3_PARSE_LIST,
356 X509V3_R_INVALID_NULL_VALUE);
359 X509V3_add_value(ntmp, vtmp, &values);
361 ntmp = strip_spaces(q);
363 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
366 X509V3_add_value(ntmp, NULL, &values);
368 OPENSSL_free(linebuf);
372 OPENSSL_free(linebuf);
373 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
378 /* Delete leading and trailing spaces from a string */
379 static char *strip_spaces(char *name)
382 /* Skip over leading spaces */
384 while (*p && isspace((unsigned char)*p))
388 q = p + strlen(p) - 1;
389 while ((q != p) && isspace((unsigned char)*q))
398 /* hex string utilities */
401 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
402 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
403 * on EBCDIC machines)
406 char *hex_to_string(const unsigned char *buffer, long len)
409 const unsigned char *p;
411 const static char hexdig[] = "0123456789ABCDEF";
414 if ((tmp = OPENSSL_malloc(len * 3 + 1)) == NULL) {
415 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
419 for (i = 0, p = buffer; i < len; i++, p++) {
420 *q++ = hexdig[(*p >> 4) & 0xf];
421 *q++ = hexdig[*p & 0xf];
425 #ifdef CHARSET_EBCDIC
426 ebcdic2ascii(tmp, tmp, q - tmp - 1);
433 * Give a string of hex digits convert to a buffer
436 unsigned char *string_to_hex(const char *str, long *len)
438 unsigned char *hexbuf, *q;
439 unsigned char ch, cl, *p;
441 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
444 if ((hexbuf = OPENSSL_malloc(strlen(str) >> 1)) == NULL)
446 for (p = (unsigned char *)str, q = hexbuf; *p;) {
448 #ifdef CHARSET_EBCDIC
449 ch = os_toebcdic[ch];
454 #ifdef CHARSET_EBCDIC
455 cl = os_toebcdic[cl];
458 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
459 OPENSSL_free(hexbuf);
467 if ((ch >= '0') && (ch <= '9'))
469 else if ((ch >= 'a') && (ch <= 'f'))
474 if ((cl >= '0') && (cl <= '9'))
476 else if ((cl >= 'a') && (cl <= 'f'))
481 *q++ = (ch << 4) | cl;
490 OPENSSL_free(hexbuf);
491 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
495 OPENSSL_free(hexbuf);
496 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
502 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
505 int name_cmp(const char *name, const char *cmp)
510 if ((ret = strncmp(name, cmp, len)))
513 if (!c || (c == '.'))
518 static int sk_strcmp(const char *const *a, const char *const *b)
520 return strcmp(*a, *b);
523 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
526 STACK_OF(OPENSSL_STRING) *ret;
528 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
529 ret = get_email(X509_get_subject_name(x), gens);
530 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
534 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
536 AUTHORITY_INFO_ACCESS *info;
537 STACK_OF(OPENSSL_STRING) *ret = NULL;
540 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
543 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
544 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
545 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
546 if (ad->location->type == GEN_URI) {
548 (&ret, ad->location->d.uniformResourceIdentifier))
553 AUTHORITY_INFO_ACCESS_free(info);
557 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
560 STACK_OF(X509_EXTENSION) *exts;
561 STACK_OF(OPENSSL_STRING) *ret;
563 exts = X509_REQ_get_extensions(x);
564 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
565 ret = get_email(X509_REQ_get_subject_name(x), gens);
566 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
567 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
571 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
574 STACK_OF(OPENSSL_STRING) *ret = NULL;
576 ASN1_IA5STRING *email;
579 /* Now add any email address(es) to STACK */
581 /* First supplied X509_NAME */
582 while ((i = X509_NAME_get_index_by_NID(name,
583 NID_pkcs9_emailAddress, i)) >= 0) {
584 ne = X509_NAME_get_entry(name, i);
585 email = X509_NAME_ENTRY_get_data(ne);
586 if (!append_ia5(&ret, email))
589 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
590 gen = sk_GENERAL_NAME_value(gens, i);
591 if (gen->type != GEN_EMAIL)
593 if (!append_ia5(&ret, gen->d.ia5))
599 static void str_free(OPENSSL_STRING str)
604 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
607 /* First some sanity checks */
608 if (email->type != V_ASN1_IA5STRING)
610 if (!email->data || !email->length)
613 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
616 /* Don't add duplicates */
617 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
619 emtmp = OPENSSL_strdup((char *)email->data);
620 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
621 X509_email_free(*sk);
628 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
630 sk_OPENSSL_STRING_pop_free(sk, str_free);
633 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
634 const unsigned char *subject, size_t subject_len,
637 /* Skip pattern prefix to match "wildcard" subject */
638 static void skip_prefix(const unsigned char **p, size_t *plen,
642 const unsigned char *pattern = *p;
643 size_t pattern_len = *plen;
646 * If subject starts with a leading '.' followed by more octets, and
647 * pattern is longer, compare just an equal-length suffix with the
648 * full subject (starting at the '.'), provided the prefix contains
651 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
654 while (pattern_len > subject_len && *pattern) {
655 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
662 /* Skip if entire prefix acceptable */
663 if (pattern_len == subject_len) {
669 /* Compare while ASCII ignoring case. */
670 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
671 const unsigned char *subject, size_t subject_len,
674 skip_prefix(&pattern, &pattern_len, subject_len, flags);
675 if (pattern_len != subject_len)
677 while (pattern_len) {
678 unsigned char l = *pattern;
679 unsigned char r = *subject;
680 /* The pattern must not contain NUL characters. */
684 if ('A' <= l && l <= 'Z')
686 if ('A' <= r && r <= 'Z')
698 /* Compare using memcmp. */
699 static int equal_case(const unsigned char *pattern, size_t pattern_len,
700 const unsigned char *subject, size_t subject_len,
703 skip_prefix(&pattern, &pattern_len, subject_len, flags);
704 if (pattern_len != subject_len)
706 return !memcmp(pattern, subject, pattern_len);
710 * RFC 5280, section 7.5, requires that only the domain is compared in a
711 * case-insensitive manner.
713 static int equal_email(const unsigned char *a, size_t a_len,
714 const unsigned char *b, size_t b_len,
715 unsigned int unused_flags)
721 * We search backwards for the '@' character, so that we do not have to
722 * deal with quoted local-parts. The domain part is compared in a
723 * case-insensitive manner.
727 if (a[i] == '@' || b[i] == '@') {
728 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
735 return equal_case(a, i, b, i, 0);
739 * Compare the prefix and suffix with the subject, and check that the
740 * characters in-between are valid.
742 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
743 const unsigned char *suffix, size_t suffix_len,
744 const unsigned char *subject, size_t subject_len,
747 const unsigned char *wildcard_start;
748 const unsigned char *wildcard_end;
749 const unsigned char *p;
753 if (subject_len < prefix_len + suffix_len)
755 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
757 wildcard_start = subject + prefix_len;
758 wildcard_end = subject + (subject_len - suffix_len);
759 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
762 * If the wildcard makes up the entire first label, it must match at
763 * least one character.
765 if (prefix_len == 0 && *suffix == '.') {
766 if (wildcard_start == wildcard_end)
769 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
772 /* IDNA labels cannot match partial wildcards */
774 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
776 /* The wildcard may match a literal '*' */
777 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
780 * Check that the part matched by the wildcard contains only
781 * permitted characters and only matches a single label unless
782 * allow_multi is set.
784 for (p = wildcard_start; p != wildcard_end; ++p)
785 if (!(('0' <= *p && *p <= '9') ||
786 ('A' <= *p && *p <= 'Z') ||
787 ('a' <= *p && *p <= 'z') ||
788 *p == '-' || (allow_multi && *p == '.')))
793 #define LABEL_START (1 << 0)
794 #define LABEL_END (1 << 1)
795 #define LABEL_HYPHEN (1 << 2)
796 #define LABEL_IDNA (1 << 3)
798 static const unsigned char *valid_star(const unsigned char *p, size_t len,
801 const unsigned char *star = 0;
803 int state = LABEL_START;
805 for (i = 0; i < len; ++i) {
807 * Locate first and only legal wildcard, either at the start
808 * or end of a non-IDNA first and not final label.
811 int atstart = (state & LABEL_START);
812 int atend = (i == len - 1 || p[i + 1] == '.');
814 * At most one wildcard per pattern.
815 * No wildcards in IDNA labels.
816 * No wildcards after the first label.
818 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
820 /* Only full-label '*.example.com' wildcards? */
821 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
822 && (!atstart || !atend))
824 /* No 'foo*bar' wildcards */
825 if (!atstart && !atend)
828 state &= ~LABEL_START;
829 } else if (('a' <= p[i] && p[i] <= 'z')
830 || ('A' <= p[i] && p[i] <= 'Z')
831 || ('0' <= p[i] && p[i] <= '9')) {
832 if ((state & LABEL_START) != 0
833 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
835 state &= ~(LABEL_HYPHEN | LABEL_START);
836 } else if (p[i] == '.') {
837 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
841 } else if (p[i] == '-') {
842 /* no domain/subdomain starts with '-' */
843 if ((state & LABEL_START) != 0)
845 state |= LABEL_HYPHEN;
851 * The final label must not end in a hyphen or ".", and
852 * there must be at least two dots after the star.
854 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
859 /* Compare using wildcards. */
860 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
861 const unsigned char *subject, size_t subject_len,
864 const unsigned char *star = NULL;
867 * Subject names starting with '.' can only match a wildcard pattern
868 * via a subject sub-domain pattern suffix match.
870 if (!(subject_len > 1 && subject[0] == '.'))
871 star = valid_star(pattern, pattern_len, flags);
873 return equal_nocase(pattern, pattern_len,
874 subject, subject_len, flags);
875 return wildcard_match(pattern, star - pattern,
876 star + 1, (pattern + pattern_len) - star - 1,
877 subject, subject_len, flags);
881 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
882 * cmp_type > 0 only compare if string matches the type, otherwise convert it
886 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
887 unsigned int flags, const char *b, size_t blen,
892 if (!a->data || !a->length)
895 if (cmp_type != a->type)
897 if (cmp_type == V_ASN1_IA5STRING)
898 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
899 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
901 if (rv > 0 && peername)
902 *peername = OPENSSL_strndup((char *)a->data, a->length);
906 astrlen = ASN1_STRING_to_UTF8(&astr, a);
909 * -1 could be an internal malloc failure or a decoding error from
910 * malformed input; we can't distinguish.
914 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
915 if (rv > 0 && peername)
916 *peername = OPENSSL_strndup((char *)astr, astrlen);
922 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
923 unsigned int flags, int check_type, char **peername)
925 GENERAL_NAMES *gens = NULL;
926 X509_NAME *name = NULL;
928 int cnid = NID_undef;
934 /* See below, this flag is internal-only */
935 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
936 if (check_type == GEN_EMAIL) {
937 cnid = NID_pkcs9_emailAddress;
938 alt_type = V_ASN1_IA5STRING;
940 } else if (check_type == GEN_DNS) {
941 cnid = NID_commonName;
942 /* Implicit client-side DNS sub-domain pattern */
943 if (chklen > 1 && chk[0] == '.')
944 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
945 alt_type = V_ASN1_IA5STRING;
946 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
947 equal = equal_nocase;
949 equal = equal_wildcard;
951 alt_type = V_ASN1_OCTET_STRING;
956 chklen = strlen(chk);
958 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
960 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
963 gen = sk_GENERAL_NAME_value(gens, i);
964 if (gen->type != check_type)
967 if (check_type == GEN_EMAIL)
968 cstr = gen->d.rfc822Name;
969 else if (check_type == GEN_DNS)
970 cstr = gen->d.dNSName;
972 cstr = gen->d.iPAddress;
973 /* Positive on success, negative on error! */
974 if ((rv = do_check_string(cstr, alt_type, equal, flags,
975 chk, chklen, peername)) != 0)
978 GENERAL_NAMES_free(gens);
981 if (cnid == NID_undef
983 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
987 /* We're done if CN-ID is not pertinent */
988 if (cnid == NID_undef)
992 name = X509_get_subject_name(x);
993 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
996 ne = X509_NAME_get_entry(name, i);
997 str = X509_NAME_ENTRY_get_data(ne);
998 /* Positive on success, negative on error! */
999 if ((rv = do_check_string(str, -1, equal, flags,
1000 chk, chklen, peername)) != 0)
1006 int X509_check_host(X509 *x, const char *chk, size_t chklen,
1007 unsigned int flags, char **peername)
1012 * Embedded NULs are disallowed, except as the last character of a
1013 * string of length 2 or more (tolerate caller including terminating
1014 * NUL in string length).
1017 chklen = strlen(chk);
1018 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1020 if (chklen > 1 && chk[chklen - 1] == '\0')
1022 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
1025 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1031 * Embedded NULs are disallowed, except as the last character of a
1032 * string of length 2 or more (tolerate caller including terminating
1033 * NUL in string length).
1036 chklen = strlen((char *)chk);
1037 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1039 if (chklen > 1 && chk[chklen - 1] == '\0')
1041 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1044 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1049 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1052 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1054 unsigned char ipout[16];
1059 iplen = (size_t)a2i_ipadd(ipout, ipasc);
1062 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1066 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1070 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1072 unsigned char ipout[16];
1073 ASN1_OCTET_STRING *ret;
1076 /* If string contains a ':' assume IPv6 */
1078 iplen = a2i_ipadd(ipout, ipasc);
1083 ret = ASN1_OCTET_STRING_new();
1086 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1087 ASN1_OCTET_STRING_free(ret);
1093 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1095 ASN1_OCTET_STRING *ret = NULL;
1096 unsigned char ipout[32];
1097 char *iptmp = NULL, *p;
1099 p = strchr(ipasc, '/');
1102 iptmp = OPENSSL_strdup(ipasc);
1105 p = iptmp + (p - ipasc);
1108 iplen1 = a2i_ipadd(ipout, iptmp);
1113 iplen2 = a2i_ipadd(ipout + iplen1, p);
1115 OPENSSL_free(iptmp);
1118 if (!iplen2 || (iplen1 != iplen2))
1121 ret = ASN1_OCTET_STRING_new();
1124 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1130 OPENSSL_free(iptmp);
1131 ASN1_OCTET_STRING_free(ret);
1135 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1137 /* If string contains a ':' assume IPv6 */
1139 if (strchr(ipasc, ':')) {
1140 if (!ipv6_from_asc(ipout, ipasc))
1144 if (!ipv4_from_asc(ipout, ipasc))
1150 static int ipv4_from_asc(unsigned char *v4, const char *in)
1153 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1155 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1156 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1166 /* Temporary store for IPV6 output */
1167 unsigned char tmp[16];
1168 /* Total number of bytes in tmp */
1170 /* The position of a zero (corresponding to '::') */
1172 /* Number of zeroes */
1176 static int ipv6_from_asc(unsigned char *v6, const char *in)
1180 v6stat.zero_pos = -1;
1181 v6stat.zero_cnt = 0;
1183 * Treat the IPv6 representation as a list of values separated by ':'.
1184 * The presence of a '::' will parse as one, two or three zero length
1187 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1190 /* Now for some sanity checks */
1192 if (v6stat.zero_pos == -1) {
1193 /* If no '::' must have exactly 16 bytes */
1194 if (v6stat.total != 16)
1197 /* If '::' must have less than 16 bytes */
1198 if (v6stat.total == 16)
1200 /* More than three zeroes is an error */
1201 if (v6stat.zero_cnt > 3)
1203 /* Can only have three zeroes if nothing else present */
1204 else if (v6stat.zero_cnt == 3) {
1205 if (v6stat.total > 0)
1208 /* Can only have two zeroes if at start or end */
1209 else if (v6stat.zero_cnt == 2) {
1210 if ((v6stat.zero_pos != 0)
1211 && (v6stat.zero_pos != v6stat.total))
1214 /* Can only have one zero if *not* start or end */
1216 if ((v6stat.zero_pos == 0)
1217 || (v6stat.zero_pos == v6stat.total))
1224 if (v6stat.zero_pos >= 0) {
1225 /* Copy initial part */
1226 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1228 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1229 /* Copy final part */
1230 if (v6stat.total != v6stat.zero_pos)
1231 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1232 v6stat.tmp + v6stat.zero_pos,
1233 v6stat.total - v6stat.zero_pos);
1235 memcpy(v6, v6stat.tmp, 16);
1240 static int ipv6_cb(const char *elem, int len, void *usr)
1243 /* Error if 16 bytes written */
1247 /* Zero length element, corresponds to '::' */
1248 if (s->zero_pos == -1)
1249 s->zero_pos = s->total;
1250 /* If we've already got a :: its an error */
1251 else if (s->zero_pos != s->total)
1255 /* If more than 4 characters could be final a.b.c.d form */
1257 /* Need at least 4 bytes left */
1260 /* Must be end of string */
1263 if (!ipv4_from_asc(s->tmp + s->total, elem))
1267 if (!ipv6_hex(s->tmp + s->total, elem, len))
1276 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1279 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1282 unsigned int num = 0;
1288 if ((c >= '0') && (c <= '9'))
1290 else if ((c >= 'A') && (c <= 'F'))
1291 num |= c - 'A' + 10;
1292 else if ((c >= 'a') && (c <= 'f'))
1293 num |= c - 'a' + 10;
1298 out[1] = num & 0xff;
1302 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1303 unsigned long chtype)
1306 int i, mval, spec_char, plus_char;
1311 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1312 v = sk_CONF_VALUE_value(dn_sk, i);
1315 * Skip past any leading X. X: X, etc to allow for multiple instances
1317 for (p = type; *p; p++) {
1318 #ifndef CHARSET_EBCDIC
1319 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1321 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1322 || (*p == os_toascii['.']));
1331 #ifndef CHARSET_EBCDIC
1332 plus_char = (*type == '+');
1334 plus_char = (*type == os_toascii['+']);
1341 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1342 (unsigned char *)v->value, -1, -1,