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
= BUF_strdup(name
)) == NULL
)
91 if (value
&& (tvalue
= BUF_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
= BUF_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
= BUF_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 if ((state
& LABEL_HYPHEN
) != 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
= BUF_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
= BUF_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
= BUF_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
)
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 if ((*p
== ':') || (*p
== ',') || (*p
== '.'))
1321 if ((*p
== os_toascii
[':']) || (*p
== os_toascii
[','])
1322 || (*p
== os_toascii
['.']))
1330 #ifndef CHARSET_EBCDIC
1333 if (*type
== os_toascii
['+'])
1340 if (!X509_NAME_add_entry_by_txt(nm
, type
, chtype
,
1341 (unsigned char *)v
->value
, -1, -1,