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 */
63 #include "internal/cryptlib.h"
64 #include <openssl/conf.h>
65 #include <openssl/x509v3.h>
66 #include "internal/x509_int.h"
67 #include <openssl/bn.h>
69 static char *strip_spaces(char *name);
70 static int sk_strcmp(const char *const *a, const char *const *b);
71 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
73 static void str_free(OPENSSL_STRING str);
74 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
76 static int ipv4_from_asc(unsigned char *v4, const char *in);
77 static int ipv6_from_asc(unsigned char *v6, const char *in);
78 static int ipv6_cb(const char *elem, int len, void *usr);
79 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
81 /* Add a CONF_VALUE name value pair to stack */
83 int X509V3_add_value(const char *name, const char *value,
84 STACK_OF(CONF_VALUE) **extlist)
86 CONF_VALUE *vtmp = NULL;
87 char *tname = NULL, *tvalue = NULL;
89 if (name && (tname = OPENSSL_strdup(name)) == NULL)
91 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
93 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
95 if (*extlist == NULL && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
100 if (!sk_CONF_VALUE_push(*extlist, vtmp))
104 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
107 OPENSSL_free(tvalue);
111 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
112 STACK_OF(CONF_VALUE) **extlist)
114 return X509V3_add_value(name, (const char *)value, extlist);
117 /* Free function for STACK_OF(CONF_VALUE) */
119 void X509V3_conf_free(CONF_VALUE *conf)
123 OPENSSL_free(conf->name);
124 OPENSSL_free(conf->value);
125 OPENSSL_free(conf->section);
129 int X509V3_add_value_bool(const char *name, int asn1_bool,
130 STACK_OF(CONF_VALUE) **extlist)
133 return X509V3_add_value(name, "TRUE", extlist);
134 return X509V3_add_value(name, "FALSE", extlist);
137 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
138 STACK_OF(CONF_VALUE) **extlist)
141 return X509V3_add_value(name, "TRUE", extlist);
145 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
147 BIGNUM *bntmp = NULL;
152 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
153 || (strtmp = BN_bn2dec(bntmp)) == NULL)
154 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
159 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
161 BIGNUM *bntmp = NULL;
166 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
167 || (strtmp = BN_bn2dec(bntmp)) == NULL)
168 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
173 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
180 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
185 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
188 if (value[0] == '-') {
194 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
201 ret = BN_hex2bn(&bn, value);
203 ret = BN_dec2bn(&bn, value);
205 if (!ret || value[ret]) {
207 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
211 if (isneg && BN_is_zero(bn))
214 aint = BN_to_ASN1_INTEGER(bn, NULL);
217 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
218 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
222 aint->type |= V_ASN1_NEG;
226 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
227 STACK_OF(CONF_VALUE) **extlist)
234 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
236 ret = X509V3_add_value(name, strtmp, extlist);
237 OPENSSL_free(strtmp);
241 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
245 if ((btmp = value->value) == NULL)
247 if (strcmp(btmp, "TRUE") == 0
248 || strcmp(btmp, "true") == 0
249 || strcmp(btmp, "Y") == 0
250 || strcmp(btmp, "y") == 0
251 || strcmp(btmp, "YES") == 0
252 || strcmp(btmp, "yes") == 0) {
256 if (strcmp(btmp, "FALSE") == 0
257 || strcmp(btmp, "false") == 0
258 || strcmp(btmp, "N") == 0
259 || strcmp(btmp, "n") == 0
260 || strcmp(btmp, "NO") == 0
261 || strcmp(btmp, "no") == 0) {
266 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
267 X509V3_R_INVALID_BOOLEAN_STRING);
268 X509V3_conf_err(value);
272 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
276 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
277 X509V3_conf_err(value);
291 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
295 STACK_OF(CONF_VALUE) *values = NULL;
298 /* We are going to modify the line so copy it first */
299 linebuf = OPENSSL_strdup(line);
300 if (linebuf == NULL) {
301 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
306 /* Go through all characters */
307 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
315 ntmp = strip_spaces(q);
317 X509V3err(X509V3_F_X509V3_PARSE_LIST,
318 X509V3_R_INVALID_NULL_NAME);
322 } else if (c == ',') {
324 ntmp = strip_spaces(q);
327 X509V3err(X509V3_F_X509V3_PARSE_LIST,
328 X509V3_R_INVALID_NULL_NAME);
331 X509V3_add_value(ntmp, NULL, &values);
339 vtmp = strip_spaces(q);
341 X509V3err(X509V3_F_X509V3_PARSE_LIST,
342 X509V3_R_INVALID_NULL_VALUE);
345 X509V3_add_value(ntmp, vtmp, &values);
353 if (state == HDR_VALUE) {
354 vtmp = strip_spaces(q);
356 X509V3err(X509V3_F_X509V3_PARSE_LIST,
357 X509V3_R_INVALID_NULL_VALUE);
360 X509V3_add_value(ntmp, vtmp, &values);
362 ntmp = strip_spaces(q);
364 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
367 X509V3_add_value(ntmp, NULL, &values);
369 OPENSSL_free(linebuf);
373 OPENSSL_free(linebuf);
374 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
379 /* Delete leading and trailing spaces from a string */
380 static char *strip_spaces(char *name)
383 /* Skip over leading spaces */
385 while (*p && isspace((unsigned char)*p))
389 q = p + strlen(p) - 1;
390 while ((q != p) && isspace((unsigned char)*q))
399 /* hex string utilities */
402 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
403 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
404 * on EBCDIC machines)
407 char *hex_to_string(const unsigned char *buffer, long len)
410 const unsigned char *p;
412 const static char hexdig[] = "0123456789ABCDEF";
415 if ((tmp = OPENSSL_malloc(len * 3 + 1)) == NULL) {
416 X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
420 for (i = 0, p = buffer; i < len; i++, p++) {
421 *q++ = hexdig[(*p >> 4) & 0xf];
422 *q++ = hexdig[*p & 0xf];
426 #ifdef CHARSET_EBCDIC
427 ebcdic2ascii(tmp, tmp, q - tmp - 1);
434 * Give a string of hex digits convert to a buffer
437 unsigned char *string_to_hex(const char *str, long *len)
439 unsigned char *hexbuf, *q;
440 unsigned char ch, cl, *p;
442 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
445 if ((hexbuf = OPENSSL_malloc(strlen(str) >> 1)) == NULL)
447 for (p = (unsigned char *)str, q = hexbuf; *p;) {
449 #ifdef CHARSET_EBCDIC
450 ch = os_toebcdic[ch];
455 #ifdef CHARSET_EBCDIC
456 cl = os_toebcdic[cl];
459 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
460 OPENSSL_free(hexbuf);
468 if ((ch >= '0') && (ch <= '9'))
470 else if ((ch >= 'a') && (ch <= 'f'))
475 if ((cl >= '0') && (cl <= '9'))
477 else if ((cl >= 'a') && (cl <= 'f'))
482 *q++ = (ch << 4) | cl;
491 OPENSSL_free(hexbuf);
492 X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
496 OPENSSL_free(hexbuf);
497 X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
503 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
506 int name_cmp(const char *name, const char *cmp)
511 if ((ret = strncmp(name, cmp, len)))
514 if (!c || (c == '.'))
519 static int sk_strcmp(const char *const *a, const char *const *b)
521 return strcmp(*a, *b);
524 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
527 STACK_OF(OPENSSL_STRING) *ret;
529 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
530 ret = get_email(X509_get_subject_name(x), gens);
531 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
535 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
537 AUTHORITY_INFO_ACCESS *info;
538 STACK_OF(OPENSSL_STRING) *ret = NULL;
541 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
544 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
545 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
546 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
547 if (ad->location->type == GEN_URI) {
549 (&ret, ad->location->d.uniformResourceIdentifier))
554 AUTHORITY_INFO_ACCESS_free(info);
558 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
561 STACK_OF(X509_EXTENSION) *exts;
562 STACK_OF(OPENSSL_STRING) *ret;
564 exts = X509_REQ_get_extensions(x);
565 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
566 ret = get_email(X509_REQ_get_subject_name(x), gens);
567 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
568 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
572 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
575 STACK_OF(OPENSSL_STRING) *ret = NULL;
577 ASN1_IA5STRING *email;
580 /* Now add any email address(es) to STACK */
582 /* First supplied X509_NAME */
583 while ((i = X509_NAME_get_index_by_NID(name,
584 NID_pkcs9_emailAddress, i)) >= 0) {
585 ne = X509_NAME_get_entry(name, i);
586 email = X509_NAME_ENTRY_get_data(ne);
587 if (!append_ia5(&ret, email))
590 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
591 gen = sk_GENERAL_NAME_value(gens, i);
592 if (gen->type != GEN_EMAIL)
594 if (!append_ia5(&ret, gen->d.ia5))
600 static void str_free(OPENSSL_STRING str)
605 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
608 /* First some sanity checks */
609 if (email->type != V_ASN1_IA5STRING)
611 if (!email->data || !email->length)
614 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
617 /* Don't add duplicates */
618 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
620 emtmp = OPENSSL_strdup((char *)email->data);
621 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
622 X509_email_free(*sk);
629 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
631 sk_OPENSSL_STRING_pop_free(sk, str_free);
634 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
635 const unsigned char *subject, size_t subject_len,
638 /* Skip pattern prefix to match "wildcard" subject */
639 static void skip_prefix(const unsigned char **p, size_t *plen,
640 const unsigned char *subject, size_t subject_len,
643 const unsigned char *pattern = *p;
644 size_t pattern_len = *plen;
647 * If subject starts with a leading '.' followed by more octets, and
648 * pattern is longer, compare just an equal-length suffix with the
649 * full subject (starting at the '.'), provided the prefix contains
652 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
655 while (pattern_len > subject_len && *pattern) {
656 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
663 /* Skip if entire prefix acceptable */
664 if (pattern_len == subject_len) {
670 /* Compare while ASCII ignoring case. */
671 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
672 const unsigned char *subject, size_t subject_len,
675 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
676 if (pattern_len != subject_len)
678 while (pattern_len) {
679 unsigned char l = *pattern;
680 unsigned char r = *subject;
681 /* The pattern must not contain NUL characters. */
685 if ('A' <= l && l <= 'Z')
687 if ('A' <= r && r <= 'Z')
699 /* Compare using memcmp. */
700 static int equal_case(const unsigned char *pattern, size_t pattern_len,
701 const unsigned char *subject, size_t subject_len,
704 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
705 if (pattern_len != subject_len)
707 return !memcmp(pattern, subject, pattern_len);
711 * RFC 5280, section 7.5, requires that only the domain is compared in a
712 * case-insensitive manner.
714 static int equal_email(const unsigned char *a, size_t a_len,
715 const unsigned char *b, size_t b_len,
716 unsigned int unused_flags)
722 * We search backwards for the '@' character, so that we do not have to
723 * deal with quoted local-parts. The domain part is compared in a
724 * case-insensitive manner.
728 if (a[i] == '@' || b[i] == '@') {
729 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
736 return equal_case(a, i, b, i, 0);
740 * Compare the prefix and suffix with the subject, and check that the
741 * characters in-between are valid.
743 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
744 const unsigned char *suffix, size_t suffix_len,
745 const unsigned char *subject, size_t subject_len,
748 const unsigned char *wildcard_start;
749 const unsigned char *wildcard_end;
750 const unsigned char *p;
754 if (subject_len < prefix_len + suffix_len)
756 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
758 wildcard_start = subject + prefix_len;
759 wildcard_end = subject + (subject_len - suffix_len);
760 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
763 * If the wildcard makes up the entire first label, it must match at
764 * least one character.
766 if (prefix_len == 0 && *suffix == '.') {
767 if (wildcard_start == wildcard_end)
770 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
773 /* IDNA labels cannot match partial wildcards */
775 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
777 /* The wildcard may match a literal '*' */
778 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
781 * Check that the part matched by the wildcard contains only
782 * permitted characters and only matches a single label unless
783 * allow_multi is set.
785 for (p = wildcard_start; p != wildcard_end; ++p)
786 if (!(('0' <= *p && *p <= '9') ||
787 ('A' <= *p && *p <= 'Z') ||
788 ('a' <= *p && *p <= 'z') ||
789 *p == '-' || (allow_multi && *p == '.')))
794 #define LABEL_START (1 << 0)
795 #define LABEL_END (1 << 1)
796 #define LABEL_HYPHEN (1 << 2)
797 #define LABEL_IDNA (1 << 3)
799 static const unsigned char *valid_star(const unsigned char *p, size_t len,
802 const unsigned char *star = 0;
804 int state = LABEL_START;
806 for (i = 0; i < len; ++i) {
808 * Locate first and only legal wildcard, either at the start
809 * or end of a non-IDNA first and not final label.
812 int atstart = (state & LABEL_START);
813 int atend = (i == len - 1 || p[i + 1] == '.');
815 * At most one wildcard per pattern.
816 * No wildcards in IDNA labels.
817 * No wildcards after the first label.
819 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
821 /* Only full-label '*.example.com' wildcards? */
822 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
823 && (!atstart || !atend))
825 /* No 'foo*bar' wildcards */
826 if (!atstart && !atend)
829 state &= ~LABEL_START;
830 } else if (('a' <= p[i] && p[i] <= 'z')
831 || ('A' <= p[i] && p[i] <= 'Z')
832 || ('0' <= p[i] && p[i] <= '9')) {
833 if ((state & LABEL_START) != 0
834 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
836 state &= ~(LABEL_HYPHEN | LABEL_START);
837 } else if (p[i] == '.') {
838 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
842 } else if (p[i] == '-') {
843 /* no domain/subdomain starts with '-' */
844 if ((state & LABEL_START) != 0)
846 state |= LABEL_HYPHEN;
852 * The final label must not end in a hyphen or ".", and
853 * there must be at least two dots after the star.
855 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
860 /* Compare using wildcards. */
861 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
862 const unsigned char *subject, size_t subject_len,
865 const unsigned char *star = NULL;
868 * Subject names starting with '.' can only match a wildcard pattern
869 * via a subject sub-domain pattern suffix match.
871 if (!(subject_len > 1 && subject[0] == '.'))
872 star = valid_star(pattern, pattern_len, flags);
874 return equal_nocase(pattern, pattern_len,
875 subject, subject_len, flags);
876 return wildcard_match(pattern, star - pattern,
877 star + 1, (pattern + pattern_len) - star - 1,
878 subject, subject_len, flags);
882 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
883 * cmp_type > 0 only compare if string matches the type, otherwise convert it
887 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
888 unsigned int flags, const char *b, size_t blen,
893 if (!a->data || !a->length)
896 if (cmp_type != a->type)
898 if (cmp_type == V_ASN1_IA5STRING)
899 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
900 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
902 if (rv > 0 && peername)
903 *peername = OPENSSL_strndup((char *)a->data, a->length);
907 astrlen = ASN1_STRING_to_UTF8(&astr, a);
910 * -1 could be an internal malloc failure or a decoding error from
911 * malformed input; we can't distinguish.
915 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
916 if (rv > 0 && peername)
917 *peername = OPENSSL_strndup((char *)astr, astrlen);
923 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
924 unsigned int flags, int check_type, char **peername)
926 GENERAL_NAMES *gens = NULL;
927 X509_NAME *name = NULL;
929 int cnid = NID_undef;
935 /* See below, this flag is internal-only */
936 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
937 if (check_type == GEN_EMAIL) {
938 cnid = NID_pkcs9_emailAddress;
939 alt_type = V_ASN1_IA5STRING;
941 } else if (check_type == GEN_DNS) {
942 cnid = NID_commonName;
943 /* Implicit client-side DNS sub-domain pattern */
944 if (chklen > 1 && chk[0] == '.')
945 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
946 alt_type = V_ASN1_IA5STRING;
947 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
948 equal = equal_nocase;
950 equal = equal_wildcard;
952 alt_type = V_ASN1_OCTET_STRING;
957 chklen = strlen(chk);
959 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
961 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
964 gen = sk_GENERAL_NAME_value(gens, i);
965 if (gen->type != check_type)
968 if (check_type == GEN_EMAIL)
969 cstr = gen->d.rfc822Name;
970 else if (check_type == GEN_DNS)
971 cstr = gen->d.dNSName;
973 cstr = gen->d.iPAddress;
974 /* Positive on success, negative on error! */
975 if ((rv = do_check_string(cstr, alt_type, equal, flags,
976 chk, chklen, peername)) != 0)
979 GENERAL_NAMES_free(gens);
982 if (cnid == NID_undef
984 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
988 /* We're done if CN-ID is not pertinent */
989 if (cnid == NID_undef)
993 name = X509_get_subject_name(x);
994 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
997 ne = X509_NAME_get_entry(name, i);
998 str = X509_NAME_ENTRY_get_data(ne);
999 /* Positive on success, negative on error! */
1000 if ((rv = do_check_string(str, -1, equal, flags,
1001 chk, chklen, peername)) != 0)
1007 int X509_check_host(X509 *x, const char *chk, size_t chklen,
1008 unsigned int flags, char **peername)
1013 * Embedded NULs are disallowed, except as the last character of a
1014 * string of length 2 or more (tolerate caller including terminating
1015 * NUL in string length).
1018 chklen = strlen(chk);
1019 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1021 if (chklen > 1 && chk[chklen - 1] == '\0')
1023 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
1026 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1032 * Embedded NULs are disallowed, except as the last character of a
1033 * string of length 2 or more (tolerate caller including terminating
1034 * NUL in string length).
1037 chklen = strlen((char *)chk);
1038 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1040 if (chklen > 1 && chk[chklen - 1] == '\0')
1042 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1045 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1050 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1053 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1055 unsigned char ipout[16];
1060 iplen = (size_t)a2i_ipadd(ipout, ipasc);
1063 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1067 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1071 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1073 unsigned char ipout[16];
1074 ASN1_OCTET_STRING *ret;
1077 /* If string contains a ':' assume IPv6 */
1079 iplen = a2i_ipadd(ipout, ipasc);
1084 ret = ASN1_OCTET_STRING_new();
1087 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1088 ASN1_OCTET_STRING_free(ret);
1094 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1096 ASN1_OCTET_STRING *ret = NULL;
1097 unsigned char ipout[32];
1098 char *iptmp = NULL, *p;
1100 p = strchr(ipasc, '/');
1103 iptmp = OPENSSL_strdup(ipasc);
1106 p = iptmp + (p - ipasc);
1109 iplen1 = a2i_ipadd(ipout, iptmp);
1114 iplen2 = a2i_ipadd(ipout + iplen1, p);
1116 OPENSSL_free(iptmp);
1119 if (!iplen2 || (iplen1 != iplen2))
1122 ret = ASN1_OCTET_STRING_new();
1125 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1131 OPENSSL_free(iptmp);
1132 ASN1_OCTET_STRING_free(ret);
1136 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1138 /* If string contains a ':' assume IPv6 */
1140 if (strchr(ipasc, ':')) {
1141 if (!ipv6_from_asc(ipout, ipasc))
1145 if (!ipv4_from_asc(ipout, ipasc))
1151 static int ipv4_from_asc(unsigned char *v4, const char *in)
1154 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1156 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1157 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1167 /* Temporary store for IPV6 output */
1168 unsigned char tmp[16];
1169 /* Total number of bytes in tmp */
1171 /* The position of a zero (corresponding to '::') */
1173 /* Number of zeroes */
1177 static int ipv6_from_asc(unsigned char *v6, const char *in)
1181 v6stat.zero_pos = -1;
1182 v6stat.zero_cnt = 0;
1184 * Treat the IPv6 representation as a list of values separated by ':'.
1185 * The presence of a '::' will parse as one, two or three zero length
1188 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1191 /* Now for some sanity checks */
1193 if (v6stat.zero_pos == -1) {
1194 /* If no '::' must have exactly 16 bytes */
1195 if (v6stat.total != 16)
1198 /* If '::' must have less than 16 bytes */
1199 if (v6stat.total == 16)
1201 /* More than three zeroes is an error */
1202 if (v6stat.zero_cnt > 3)
1204 /* Can only have three zeroes if nothing else present */
1205 else if (v6stat.zero_cnt == 3) {
1206 if (v6stat.total > 0)
1209 /* Can only have two zeroes if at start or end */
1210 else if (v6stat.zero_cnt == 2) {
1211 if ((v6stat.zero_pos != 0)
1212 && (v6stat.zero_pos != v6stat.total))
1215 /* Can only have one zero if *not* start or end */
1217 if ((v6stat.zero_pos == 0)
1218 || (v6stat.zero_pos == v6stat.total))
1225 if (v6stat.zero_pos >= 0) {
1226 /* Copy initial part */
1227 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1229 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1230 /* Copy final part */
1231 if (v6stat.total != v6stat.zero_pos)
1232 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1233 v6stat.tmp + v6stat.zero_pos,
1234 v6stat.total - v6stat.zero_pos);
1236 memcpy(v6, v6stat.tmp, 16);
1241 static int ipv6_cb(const char *elem, int len, void *usr)
1244 /* Error if 16 bytes written */
1248 /* Zero length element, corresponds to '::' */
1249 if (s->zero_pos == -1)
1250 s->zero_pos = s->total;
1251 /* If we've already got a :: its an error */
1252 else if (s->zero_pos != s->total)
1256 /* If more than 4 characters could be final a.b.c.d form */
1258 /* Need at least 4 bytes left */
1261 /* Must be end of string */
1264 if (!ipv4_from_asc(s->tmp + s->total, elem))
1268 if (!ipv6_hex(s->tmp + s->total, elem, len))
1277 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1280 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1283 unsigned int num = 0;
1289 if ((c >= '0') && (c <= '9'))
1291 else if ((c >= 'A') && (c <= 'F'))
1292 num |= c - 'A' + 10;
1293 else if ((c >= 'a') && (c <= 'f'))
1294 num |= c - 'a' + 10;
1299 out[1] = num & 0xff;
1303 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1304 unsigned long chtype)
1312 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1313 v = sk_CONF_VALUE_value(dn_sk, i);
1316 * Skip past any leading X. X: X, etc to allow for multiple instances
1318 for (p = type; *p; p++)
1319 #ifndef CHARSET_EBCDIC
1320 if ((*p == ':') || (*p == ',') || (*p == '.'))
1322 if ((*p == os_toascii[':']) || (*p == os_toascii[','])
1323 || (*p == os_toascii['.']))
1331 #ifndef CHARSET_EBCDIC
1334 if (*type == os_toascii['+'])
1341 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1342 (unsigned char *)v->value, -1, -1,