2 * Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* X509 v3 extension utilities */
13 #include "internal/cryptlib.h"
15 #include "crypto/ctype.h"
16 #include <openssl/conf.h>
17 #include <openssl/crypto.h>
18 #include <openssl/x509v3.h>
19 #include "crypto/x509.h"
20 #include <openssl/bn.h>
22 #include "x509_local.h"
24 DEFINE_STACK_OF(CONF_VALUE
)
26 static char *strip_spaces(char *name
);
27 static int sk_strcmp(const char *const *a
, const char *const *b
);
28 static STACK_OF(OPENSSL_STRING
) *get_email(const X509_NAME
*name
,
30 static void str_free(OPENSSL_STRING str
);
31 static int append_ia5(STACK_OF(OPENSSL_STRING
) **sk
,
32 const ASN1_IA5STRING
*email
);
34 static int ipv4_from_asc(unsigned char *v4
, const char *in
);
35 static int ipv6_from_asc(unsigned char *v6
, const char *in
);
36 static int ipv6_cb(const char *elem
, int len
, void *usr
);
37 static int ipv6_hex(unsigned char *out
, const char *in
, int inlen
);
39 /* Add a CONF_VALUE name value pair to stack */
41 int X509V3_add_value(const char *name
, const char *value
,
42 STACK_OF(CONF_VALUE
) **extlist
)
44 CONF_VALUE
*vtmp
= NULL
;
45 char *tname
= NULL
, *tvalue
= NULL
;
46 int sk_allocated
= (*extlist
== NULL
);
48 if (name
&& (tname
= OPENSSL_strdup(name
)) == NULL
)
50 if (value
&& (tvalue
= OPENSSL_strdup(value
)) == NULL
)
52 if ((vtmp
= OPENSSL_malloc(sizeof(*vtmp
))) == NULL
)
54 if (sk_allocated
&& (*extlist
= sk_CONF_VALUE_new_null()) == NULL
)
59 if (!sk_CONF_VALUE_push(*extlist
, vtmp
))
63 X509V3err(X509V3_F_X509V3_ADD_VALUE
, ERR_R_MALLOC_FAILURE
);
65 sk_CONF_VALUE_free(*extlist
);
74 int X509V3_add_value_uchar(const char *name
, const unsigned char *value
,
75 STACK_OF(CONF_VALUE
) **extlist
)
77 return X509V3_add_value(name
, (const char *)value
, extlist
);
80 /* Free function for STACK_OF(CONF_VALUE) */
82 void X509V3_conf_free(CONF_VALUE
*conf
)
86 OPENSSL_free(conf
->name
);
87 OPENSSL_free(conf
->value
);
88 OPENSSL_free(conf
->section
);
92 int X509V3_add_value_bool(const char *name
, int asn1_bool
,
93 STACK_OF(CONF_VALUE
) **extlist
)
96 return X509V3_add_value(name
, "TRUE", extlist
);
97 return X509V3_add_value(name
, "FALSE", extlist
);
100 int X509V3_add_value_bool_nf(const char *name
, int asn1_bool
,
101 STACK_OF(CONF_VALUE
) **extlist
)
104 return X509V3_add_value(name
, "TRUE", extlist
);
108 static char *bignum_to_string(const BIGNUM
*bn
)
114 * Display large numbers in hex and small numbers in decimal. Converting to
115 * decimal takes quadratic time and is no more useful than hex for large
118 if (BN_num_bits(bn
) < 128)
119 return BN_bn2dec(bn
);
125 len
= strlen(tmp
) + 3;
126 ret
= OPENSSL_malloc(len
);
128 X509V3err(X509V3_F_BIGNUM_TO_STRING
, ERR_R_MALLOC_FAILURE
);
133 /* Prepend "0x", but place it after the "-" if negative. */
135 OPENSSL_strlcpy(ret
, "-0x", len
);
136 OPENSSL_strlcat(ret
, tmp
+ 1, len
);
138 OPENSSL_strlcpy(ret
, "0x", len
);
139 OPENSSL_strlcat(ret
, tmp
, len
);
145 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD
*method
, const ASN1_ENUMERATED
*a
)
147 BIGNUM
*bntmp
= NULL
;
152 if ((bntmp
= ASN1_ENUMERATED_to_BN(a
, NULL
)) == NULL
153 || (strtmp
= bignum_to_string(bntmp
)) == NULL
)
154 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED
, ERR_R_MALLOC_FAILURE
);
159 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD
*method
, const ASN1_INTEGER
*a
)
161 BIGNUM
*bntmp
= NULL
;
166 if ((bntmp
= ASN1_INTEGER_to_BN(a
, NULL
)) == NULL
167 || (strtmp
= bignum_to_string(bntmp
)) == NULL
)
168 X509V3err(X509V3_F_I2S_ASN1_INTEGER
, ERR_R_MALLOC_FAILURE
);
173 ASN1_INTEGER
*s2i_ASN1_INTEGER(X509V3_EXT_METHOD
*method
, const char *value
)
181 X509V3err(X509V3_F_S2I_ASN1_INTEGER
, X509V3_R_INVALID_NULL_VALUE
);
186 X509V3err(X509V3_F_S2I_ASN1_INTEGER
, ERR_R_MALLOC_FAILURE
);
189 if (value
[0] == '-') {
196 if (value
[0] == '0' && ((value
[1] == 'x') || (value
[1] == 'X'))) {
204 ret
= BN_hex2bn(&bn
, value
);
206 ret
= BN_dec2bn(&bn
, value
);
208 if (!ret
|| value
[ret
]) {
210 X509V3err(X509V3_F_S2I_ASN1_INTEGER
, X509V3_R_BN_DEC2BN_ERROR
);
214 if (isneg
&& BN_is_zero(bn
))
217 aint
= BN_to_ASN1_INTEGER(bn
, NULL
);
220 X509V3err(X509V3_F_S2I_ASN1_INTEGER
,
221 X509V3_R_BN_TO_ASN1_INTEGER_ERROR
);
225 aint
->type
|= V_ASN1_NEG
;
229 int X509V3_add_value_int(const char *name
, const ASN1_INTEGER
*aint
,
230 STACK_OF(CONF_VALUE
) **extlist
)
237 if ((strtmp
= i2s_ASN1_INTEGER(NULL
, aint
)) == NULL
)
239 ret
= X509V3_add_value(name
, strtmp
, extlist
);
240 OPENSSL_free(strtmp
);
244 int X509V3_get_value_bool(const CONF_VALUE
*value
, int *asn1_bool
)
248 if ((btmp
= value
->value
) == NULL
)
250 if (strcmp(btmp
, "TRUE") == 0
251 || strcmp(btmp
, "true") == 0
252 || strcmp(btmp
, "Y") == 0
253 || strcmp(btmp
, "y") == 0
254 || strcmp(btmp
, "YES") == 0
255 || strcmp(btmp
, "yes") == 0) {
259 if (strcmp(btmp
, "FALSE") == 0
260 || strcmp(btmp
, "false") == 0
261 || strcmp(btmp
, "N") == 0
262 || strcmp(btmp
, "n") == 0
263 || strcmp(btmp
, "NO") == 0
264 || strcmp(btmp
, "no") == 0) {
269 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL
,
270 X509V3_R_INVALID_BOOLEAN_STRING
);
271 X509V3_conf_add_error_name_value(value
);
275 int X509V3_get_value_int(const CONF_VALUE
*value
, ASN1_INTEGER
**aint
)
279 if ((itmp
= s2i_ASN1_INTEGER(NULL
, value
->value
)) == NULL
) {
280 X509V3_conf_add_error_name_value(value
);
294 STACK_OF(CONF_VALUE
) *X509V3_parse_list(const char *line
)
298 STACK_OF(CONF_VALUE
) *values
= NULL
;
302 /* We are going to modify the line so copy it first */
303 linebuf
= OPENSSL_strdup(line
);
304 if (linebuf
== NULL
) {
305 X509V3err(X509V3_F_X509V3_PARSE_LIST
, ERR_R_MALLOC_FAILURE
);
310 /* Go through all characters */
311 for (p
= linebuf
, q
= linebuf
; (c
= *p
) && (c
!= '\r') && (c
!= '\n');
319 ntmp
= strip_spaces(q
);
321 X509V3err(X509V3_F_X509V3_PARSE_LIST
,
322 X509V3_R_INVALID_EMPTY_NAME
);
326 } else if (c
== ',') {
328 ntmp
= strip_spaces(q
);
331 X509V3err(X509V3_F_X509V3_PARSE_LIST
,
332 X509V3_R_INVALID_EMPTY_NAME
);
335 X509V3_add_value(ntmp
, NULL
, &values
);
343 vtmp
= strip_spaces(q
);
345 X509V3err(X509V3_F_X509V3_PARSE_LIST
,
346 X509V3_R_INVALID_NULL_VALUE
);
349 X509V3_add_value(ntmp
, vtmp
, &values
);
357 if (state
== HDR_VALUE
) {
358 vtmp
= strip_spaces(q
);
360 X509V3err(X509V3_F_X509V3_PARSE_LIST
,
361 X509V3_R_INVALID_NULL_VALUE
);
364 X509V3_add_value(ntmp
, vtmp
, &values
);
366 ntmp
= strip_spaces(q
);
368 X509V3err(X509V3_F_X509V3_PARSE_LIST
, X509V3_R_INVALID_EMPTY_NAME
);
371 X509V3_add_value(ntmp
, NULL
, &values
);
373 OPENSSL_free(linebuf
);
377 OPENSSL_free(linebuf
);
378 sk_CONF_VALUE_pop_free(values
, X509V3_conf_free
);
383 /* Delete leading and trailing spaces from a string */
384 static char *strip_spaces(char *name
)
388 /* Skip over leading spaces */
390 while (*p
&& ossl_isspace(*p
))
394 q
= p
+ strlen(p
) - 1;
395 while ((q
!= p
) && ossl_isspace(*q
))
406 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
409 int v3_name_cmp(const char *name
, const char *cmp
)
415 if ((ret
= strncmp(name
, cmp
, len
)))
418 if (!c
|| (c
== '.'))
423 static int sk_strcmp(const char *const *a
, const char *const *b
)
425 return strcmp(*a
, *b
);
428 STACK_OF(OPENSSL_STRING
) *X509_get1_email(X509
*x
)
431 STACK_OF(OPENSSL_STRING
) *ret
;
433 gens
= X509_get_ext_d2i(x
, NID_subject_alt_name
, NULL
, NULL
);
434 ret
= get_email(X509_get_subject_name(x
), gens
);
435 sk_GENERAL_NAME_pop_free(gens
, GENERAL_NAME_free
);
439 STACK_OF(OPENSSL_STRING
) *X509_get1_ocsp(X509
*x
)
441 AUTHORITY_INFO_ACCESS
*info
;
442 STACK_OF(OPENSSL_STRING
) *ret
= NULL
;
445 info
= X509_get_ext_d2i(x
, NID_info_access
, NULL
, NULL
);
448 for (i
= 0; i
< sk_ACCESS_DESCRIPTION_num(info
); i
++) {
449 ACCESS_DESCRIPTION
*ad
= sk_ACCESS_DESCRIPTION_value(info
, i
);
450 if (OBJ_obj2nid(ad
->method
) == NID_ad_OCSP
) {
451 if (ad
->location
->type
== GEN_URI
) {
453 (&ret
, ad
->location
->d
.uniformResourceIdentifier
))
458 AUTHORITY_INFO_ACCESS_free(info
);
462 STACK_OF(OPENSSL_STRING
) *X509_REQ_get1_email(X509_REQ
*x
)
465 STACK_OF(X509_EXTENSION
) *exts
;
466 STACK_OF(OPENSSL_STRING
) *ret
;
468 exts
= X509_REQ_get_extensions(x
);
469 gens
= X509V3_get_d2i(exts
, NID_subject_alt_name
, NULL
, NULL
);
470 ret
= get_email(X509_REQ_get_subject_name(x
), gens
);
471 sk_GENERAL_NAME_pop_free(gens
, GENERAL_NAME_free
);
472 sk_X509_EXTENSION_pop_free(exts
, X509_EXTENSION_free
);
476 static STACK_OF(OPENSSL_STRING
) *get_email(const X509_NAME
*name
,
479 STACK_OF(OPENSSL_STRING
) *ret
= NULL
;
481 const ASN1_IA5STRING
*email
;
485 /* Now add any email address(es) to STACK */
486 /* First supplied X509_NAME */
487 while ((i
= X509_NAME_get_index_by_NID(name
,
488 NID_pkcs9_emailAddress
, i
)) >= 0) {
489 ne
= X509_NAME_get_entry(name
, i
);
490 email
= X509_NAME_ENTRY_get_data(ne
);
491 if (!append_ia5(&ret
, email
))
494 for (i
= 0; i
< sk_GENERAL_NAME_num(gens
); i
++) {
495 gen
= sk_GENERAL_NAME_value(gens
, i
);
496 if (gen
->type
!= GEN_EMAIL
)
498 if (!append_ia5(&ret
, gen
->d
.ia5
))
504 static void str_free(OPENSSL_STRING str
)
509 static int append_ia5(STACK_OF(OPENSSL_STRING
) **sk
,
510 const ASN1_IA5STRING
*email
)
514 /* First some sanity checks */
515 if (email
->type
!= V_ASN1_IA5STRING
)
517 if (!email
->data
|| !email
->length
)
520 *sk
= sk_OPENSSL_STRING_new(sk_strcmp
);
523 /* Don't add duplicates */
524 if (sk_OPENSSL_STRING_find(*sk
, (char *)email
->data
) != -1)
526 emtmp
= OPENSSL_strdup((char *)email
->data
);
527 if (emtmp
== NULL
|| !sk_OPENSSL_STRING_push(*sk
, emtmp
)) {
528 OPENSSL_free(emtmp
); /* free on push failure */
529 X509_email_free(*sk
);
536 void X509_email_free(STACK_OF(OPENSSL_STRING
) *sk
)
538 sk_OPENSSL_STRING_pop_free(sk
, str_free
);
541 typedef int (*equal_fn
) (const unsigned char *pattern
, size_t pattern_len
,
542 const unsigned char *subject
, size_t subject_len
,
545 /* Skip pattern prefix to match "wildcard" subject */
546 static void skip_prefix(const unsigned char **p
, size_t *plen
,
550 const unsigned char *pattern
= *p
;
551 size_t pattern_len
= *plen
;
554 * If subject starts with a leading '.' followed by more octets, and
555 * pattern is longer, compare just an equal-length suffix with the
556 * full subject (starting at the '.'), provided the prefix contains
559 if ((flags
& _X509_CHECK_FLAG_DOT_SUBDOMAINS
) == 0)
562 while (pattern_len
> subject_len
&& *pattern
) {
563 if ((flags
& X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS
) &&
570 /* Skip if entire prefix acceptable */
571 if (pattern_len
== subject_len
) {
577 /* Compare while ASCII ignoring case. */
578 static int equal_nocase(const unsigned char *pattern
, size_t pattern_len
,
579 const unsigned char *subject
, size_t subject_len
,
582 skip_prefix(&pattern
, &pattern_len
, subject_len
, flags
);
583 if (pattern_len
!= subject_len
)
585 while (pattern_len
!= 0) {
586 unsigned char l
= *pattern
;
587 unsigned char r
= *subject
;
589 /* The pattern must not contain NUL characters. */
593 if ('A' <= l
&& l
<= 'Z')
595 if ('A' <= r
&& r
<= 'Z')
607 /* Compare using memcmp. */
608 static int equal_case(const unsigned char *pattern
, size_t pattern_len
,
609 const unsigned char *subject
, size_t subject_len
,
612 skip_prefix(&pattern
, &pattern_len
, subject_len
, flags
);
613 if (pattern_len
!= subject_len
)
615 return !memcmp(pattern
, subject
, pattern_len
);
619 * RFC 5280, section 7.5, requires that only the domain is compared in a
620 * case-insensitive manner.
622 static int equal_email(const unsigned char *a
, size_t a_len
,
623 const unsigned char *b
, size_t b_len
,
624 unsigned int unused_flags
)
631 * We search backwards for the '@' character, so that we do not have to
632 * deal with quoted local-parts. The domain part is compared in a
633 * case-insensitive manner.
637 if (a
[i
] == '@' || b
[i
] == '@') {
638 if (!equal_nocase(a
+ i
, a_len
- i
, b
+ i
, a_len
- i
, 0))
645 return equal_case(a
, i
, b
, i
, 0);
649 * Compare the prefix and suffix with the subject, and check that the
650 * characters in-between are valid.
652 static int wildcard_match(const unsigned char *prefix
, size_t prefix_len
,
653 const unsigned char *suffix
, size_t suffix_len
,
654 const unsigned char *subject
, size_t subject_len
,
657 const unsigned char *wildcard_start
;
658 const unsigned char *wildcard_end
;
659 const unsigned char *p
;
663 if (subject_len
< prefix_len
+ suffix_len
)
665 if (!equal_nocase(prefix
, prefix_len
, subject
, prefix_len
, flags
))
667 wildcard_start
= subject
+ prefix_len
;
668 wildcard_end
= subject
+ (subject_len
- suffix_len
);
669 if (!equal_nocase(wildcard_end
, suffix_len
, suffix
, suffix_len
, flags
))
672 * If the wildcard makes up the entire first label, it must match at
673 * least one character.
675 if (prefix_len
== 0 && *suffix
== '.') {
676 if (wildcard_start
== wildcard_end
)
679 if (flags
& X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS
)
682 /* IDNA labels cannot match partial wildcards */
684 subject_len
>= 4 && strncasecmp((char *)subject
, "xn--", 4) == 0)
686 /* The wildcard may match a literal '*' */
687 if (wildcard_end
== wildcard_start
+ 1 && *wildcard_start
== '*')
690 * Check that the part matched by the wildcard contains only
691 * permitted characters and only matches a single label unless
692 * allow_multi is set.
694 for (p
= wildcard_start
; p
!= wildcard_end
; ++p
)
695 if (!(('0' <= *p
&& *p
<= '9') ||
696 ('A' <= *p
&& *p
<= 'Z') ||
697 ('a' <= *p
&& *p
<= 'z') ||
698 *p
== '-' || (allow_multi
&& *p
== '.')))
703 #define LABEL_START (1 << 0)
704 #define LABEL_END (1 << 1)
705 #define LABEL_HYPHEN (1 << 2)
706 #define LABEL_IDNA (1 << 3)
708 static const unsigned char *valid_star(const unsigned char *p
, size_t len
,
711 const unsigned char *star
= 0;
713 int state
= LABEL_START
;
716 for (i
= 0; i
< len
; ++i
) {
718 * Locate first and only legal wildcard, either at the start
719 * or end of a non-IDNA first and not final label.
722 int atstart
= (state
& LABEL_START
);
723 int atend
= (i
== len
- 1 || p
[i
+ 1] == '.');
725 * At most one wildcard per pattern.
726 * No wildcards in IDNA labels.
727 * No wildcards after the first label.
729 if (star
!= NULL
|| (state
& LABEL_IDNA
) != 0 || dots
)
731 /* Only full-label '*.example.com' wildcards? */
732 if ((flags
& X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS
)
733 && (!atstart
|| !atend
))
735 /* No 'foo*bar' wildcards */
736 if (!atstart
&& !atend
)
739 state
&= ~LABEL_START
;
740 } else if (('a' <= p
[i
] && p
[i
] <= 'z')
741 || ('A' <= p
[i
] && p
[i
] <= 'Z')
742 || ('0' <= p
[i
] && p
[i
] <= '9')) {
743 if ((state
& LABEL_START
) != 0
744 && len
- i
>= 4 && strncasecmp((char *)&p
[i
], "xn--", 4) == 0)
746 state
&= ~(LABEL_HYPHEN
| LABEL_START
);
747 } else if (p
[i
] == '.') {
748 if ((state
& (LABEL_HYPHEN
| LABEL_START
)) != 0)
752 } else if (p
[i
] == '-') {
753 /* no domain/subdomain starts with '-' */
754 if ((state
& LABEL_START
) != 0)
756 state
|= LABEL_HYPHEN
;
763 * The final label must not end in a hyphen or ".", and
764 * there must be at least two dots after the star.
766 if ((state
& (LABEL_START
| LABEL_HYPHEN
)) != 0 || dots
< 2)
771 /* Compare using wildcards. */
772 static int equal_wildcard(const unsigned char *pattern
, size_t pattern_len
,
773 const unsigned char *subject
, size_t subject_len
,
776 const unsigned char *star
= NULL
;
779 * Subject names starting with '.' can only match a wildcard pattern
780 * via a subject sub-domain pattern suffix match.
782 if (!(subject_len
> 1 && subject
[0] == '.'))
783 star
= valid_star(pattern
, pattern_len
, flags
);
785 return equal_nocase(pattern
, pattern_len
,
786 subject
, subject_len
, flags
);
787 return wildcard_match(pattern
, star
- pattern
,
788 star
+ 1, (pattern
+ pattern_len
) - star
- 1,
789 subject
, subject_len
, flags
);
793 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
794 * cmp_type > 0 only compare if string matches the type, otherwise convert it
798 static int do_check_string(const ASN1_STRING
*a
, int cmp_type
, equal_fn equal
,
799 unsigned int flags
, const char *b
, size_t blen
,
804 if (!a
->data
|| !a
->length
)
807 if (cmp_type
!= a
->type
)
809 if (cmp_type
== V_ASN1_IA5STRING
)
810 rv
= equal(a
->data
, a
->length
, (unsigned char *)b
, blen
, flags
);
811 else if (a
->length
== (int)blen
&& !memcmp(a
->data
, b
, blen
))
813 if (rv
> 0 && peername
)
814 *peername
= OPENSSL_strndup((char *)a
->data
, a
->length
);
818 astrlen
= ASN1_STRING_to_UTF8(&astr
, a
);
821 * -1 could be an internal malloc failure or a decoding error from
822 * malformed input; we can't distinguish.
826 rv
= equal(astr
, astrlen
, (unsigned char *)b
, blen
, flags
);
827 if (rv
> 0 && peername
)
828 *peername
= OPENSSL_strndup((char *)astr
, astrlen
);
834 static int do_x509_check(X509
*x
, const char *chk
, size_t chklen
,
835 unsigned int flags
, int check_type
, char **peername
)
837 GENERAL_NAMES
*gens
= NULL
;
838 const X509_NAME
*name
= NULL
;
840 int cnid
= NID_undef
;
846 /* See below, this flag is internal-only */
847 flags
&= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS
;
848 if (check_type
== GEN_EMAIL
) {
849 cnid
= NID_pkcs9_emailAddress
;
850 alt_type
= V_ASN1_IA5STRING
;
852 } else if (check_type
== GEN_DNS
) {
853 cnid
= NID_commonName
;
854 /* Implicit client-side DNS sub-domain pattern */
855 if (chklen
> 1 && chk
[0] == '.')
856 flags
|= _X509_CHECK_FLAG_DOT_SUBDOMAINS
;
857 alt_type
= V_ASN1_IA5STRING
;
858 if (flags
& X509_CHECK_FLAG_NO_WILDCARDS
)
859 equal
= equal_nocase
;
861 equal
= equal_wildcard
;
863 alt_type
= V_ASN1_OCTET_STRING
;
868 chklen
= strlen(chk
);
870 gens
= X509_get_ext_d2i(x
, NID_subject_alt_name
, NULL
, NULL
);
872 for (i
= 0; i
< sk_GENERAL_NAME_num(gens
); i
++) {
876 gen
= sk_GENERAL_NAME_value(gens
, i
);
877 if ((gen
->type
== GEN_OTHERNAME
) && (check_type
== GEN_EMAIL
)) {
878 if (OBJ_obj2nid(gen
->d
.otherName
->type_id
) ==
879 NID_id_on_SmtpUTF8Mailbox
) {
881 cstr
= gen
->d
.otherName
->value
->value
.utf8string
;
883 /* Positive on success, negative on error! */
884 if ((rv
= do_check_string(cstr
, 0, equal
, flags
,
885 chk
, chklen
, peername
)) != 0)
890 if ((gen
->type
!= check_type
) && (gen
->type
!= GEN_OTHERNAME
))
894 if (check_type
== GEN_EMAIL
)
895 cstr
= gen
->d
.rfc822Name
;
896 else if (check_type
== GEN_DNS
)
897 cstr
= gen
->d
.dNSName
;
899 cstr
= gen
->d
.iPAddress
;
900 /* Positive on success, negative on error! */
901 if ((rv
= do_check_string(cstr
, alt_type
, equal
, flags
,
902 chk
, chklen
, peername
)) != 0)
905 GENERAL_NAMES_free(gens
);
908 if (san_present
&& !(flags
& X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
))
912 /* We're done if CN-ID is not pertinent */
913 if (cnid
== NID_undef
|| (flags
& X509_CHECK_FLAG_NEVER_CHECK_SUBJECT
))
917 name
= X509_get_subject_name(x
);
918 while ((i
= X509_NAME_get_index_by_NID(name
, cnid
, i
)) >= 0) {
919 const X509_NAME_ENTRY
*ne
= X509_NAME_get_entry(name
, i
);
920 const ASN1_STRING
*str
= X509_NAME_ENTRY_get_data(ne
);
922 /* Positive on success, negative on error! */
923 if ((rv
= do_check_string(str
, -1, equal
, flags
,
924 chk
, chklen
, peername
)) != 0)
930 int X509_check_host(X509
*x
, const char *chk
, size_t chklen
,
931 unsigned int flags
, char **peername
)
936 * Embedded NULs are disallowed, except as the last character of a
937 * string of length 2 or more (tolerate caller including terminating
938 * NUL in string length).
941 chklen
= strlen(chk
);
942 else if (memchr(chk
, '\0', chklen
> 1 ? chklen
- 1 : chklen
))
944 if (chklen
> 1 && chk
[chklen
- 1] == '\0')
946 return do_x509_check(x
, chk
, chklen
, flags
, GEN_DNS
, peername
);
949 int X509_check_email(X509
*x
, const char *chk
, size_t chklen
,
955 * Embedded NULs are disallowed, except as the last character of a
956 * string of length 2 or more (tolerate caller including terminating
957 * NUL in string length).
960 chklen
= strlen((char *)chk
);
961 else if (memchr(chk
, '\0', chklen
> 1 ? chklen
- 1 : chklen
))
963 if (chklen
> 1 && chk
[chklen
- 1] == '\0')
965 return do_x509_check(x
, chk
, chklen
, flags
, GEN_EMAIL
, NULL
);
968 int X509_check_ip(X509
*x
, const unsigned char *chk
, size_t chklen
,
973 return do_x509_check(x
, (char *)chk
, chklen
, flags
, GEN_IPADD
, NULL
);
976 int X509_check_ip_asc(X509
*x
, const char *ipasc
, unsigned int flags
)
978 unsigned char ipout
[16];
983 iplen
= (size_t)a2i_ipadd(ipout
, ipasc
);
986 return do_x509_check(x
, (char *)ipout
, iplen
, flags
, GEN_IPADD
, NULL
);
989 char *ipaddr_to_asc(unsigned char *p
, int len
)
992 * 40 is enough space for the longest IPv6 address + nul terminator byte
993 * XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX\0
996 int i
= 0, remain
= 0, bytes
= 0;
1000 BIO_snprintf(buf
, sizeof(buf
), "%d.%d.%d.%d", p
[0], p
[1], p
[2], p
[3]);
1002 /* TODO possibly combine with static i2r_address() in v3_addr.c */
1004 for (out
= buf
, i
= 8, remain
= sizeof(buf
);
1005 i
-- > 0 && bytes
>= 0;
1006 remain
-= bytes
, out
+= bytes
) {
1007 const char *template = (i
> 0 ? "%X:" : "%X");
1009 bytes
= BIO_snprintf(out
, remain
, template, p
[0] << 8 | p
[1]);
1014 BIO_snprintf(buf
, sizeof(buf
), "<invalid length=%d>", len
);
1017 return OPENSSL_strdup(buf
);
1021 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1025 ASN1_OCTET_STRING
*a2i_IPADDRESS(const char *ipasc
)
1027 unsigned char ipout
[16];
1028 ASN1_OCTET_STRING
*ret
;
1031 /* If string contains a ':' assume IPv6 */
1033 iplen
= a2i_ipadd(ipout
, ipasc
);
1038 ret
= ASN1_OCTET_STRING_new();
1041 if (!ASN1_OCTET_STRING_set(ret
, ipout
, iplen
)) {
1042 ASN1_OCTET_STRING_free(ret
);
1048 ASN1_OCTET_STRING
*a2i_IPADDRESS_NC(const char *ipasc
)
1050 ASN1_OCTET_STRING
*ret
= NULL
;
1051 unsigned char ipout
[32];
1052 char *iptmp
= NULL
, *p
;
1055 p
= strchr(ipasc
, '/');
1058 iptmp
= OPENSSL_strdup(ipasc
);
1061 p
= iptmp
+ (p
- ipasc
);
1064 iplen1
= a2i_ipadd(ipout
, iptmp
);
1069 iplen2
= a2i_ipadd(ipout
+ iplen1
, p
);
1071 OPENSSL_free(iptmp
);
1074 if (!iplen2
|| (iplen1
!= iplen2
))
1077 ret
= ASN1_OCTET_STRING_new();
1080 if (!ASN1_OCTET_STRING_set(ret
, ipout
, iplen1
+ iplen2
))
1086 OPENSSL_free(iptmp
);
1087 ASN1_OCTET_STRING_free(ret
);
1091 int a2i_ipadd(unsigned char *ipout
, const char *ipasc
)
1093 /* If string contains a ':' assume IPv6 */
1095 if (strchr(ipasc
, ':')) {
1096 if (!ipv6_from_asc(ipout
, ipasc
))
1100 if (!ipv4_from_asc(ipout
, ipasc
))
1106 static int ipv4_from_asc(unsigned char *v4
, const char *in
)
1110 if (sscanf(in
, "%d.%d.%d.%d", &a0
, &a1
, &a2
, &a3
) != 4)
1112 if ((a0
< 0) || (a0
> 255) || (a1
< 0) || (a1
> 255)
1113 || (a2
< 0) || (a2
> 255) || (a3
< 0) || (a3
> 255))
1123 /* Temporary store for IPV6 output */
1124 unsigned char tmp
[16];
1125 /* Total number of bytes in tmp */
1127 /* The position of a zero (corresponding to '::') */
1129 /* Number of zeroes */
1133 static int ipv6_from_asc(unsigned char *v6
, const char *in
)
1138 v6stat
.zero_pos
= -1;
1139 v6stat
.zero_cnt
= 0;
1141 * Treat the IPv6 representation as a list of values separated by ':'.
1142 * The presence of a '::' will parse as one, two or three zero length
1145 if (!CONF_parse_list(in
, ':', 0, ipv6_cb
, &v6stat
))
1148 /* Now for some sanity checks */
1150 if (v6stat
.zero_pos
== -1) {
1151 /* If no '::' must have exactly 16 bytes */
1152 if (v6stat
.total
!= 16)
1155 /* If '::' must have less than 16 bytes */
1156 if (v6stat
.total
== 16)
1158 /* More than three zeroes is an error */
1159 if (v6stat
.zero_cnt
> 3) {
1161 /* Can only have three zeroes if nothing else present */
1162 } else if (v6stat
.zero_cnt
== 3) {
1163 if (v6stat
.total
> 0)
1165 } else if (v6stat
.zero_cnt
== 2) {
1166 /* Can only have two zeroes if at start or end */
1167 if ((v6stat
.zero_pos
!= 0)
1168 && (v6stat
.zero_pos
!= v6stat
.total
))
1171 /* Can only have one zero if *not* start or end */
1172 if ((v6stat
.zero_pos
== 0)
1173 || (v6stat
.zero_pos
== v6stat
.total
))
1180 if (v6stat
.zero_pos
>= 0) {
1181 /* Copy initial part */
1182 memcpy(v6
, v6stat
.tmp
, v6stat
.zero_pos
);
1184 memset(v6
+ v6stat
.zero_pos
, 0, 16 - v6stat
.total
);
1185 /* Copy final part */
1186 if (v6stat
.total
!= v6stat
.zero_pos
)
1187 memcpy(v6
+ v6stat
.zero_pos
+ 16 - v6stat
.total
,
1188 v6stat
.tmp
+ v6stat
.zero_pos
,
1189 v6stat
.total
- v6stat
.zero_pos
);
1191 memcpy(v6
, v6stat
.tmp
, 16);
1197 static int ipv6_cb(const char *elem
, int len
, void *usr
)
1201 /* Error if 16 bytes written */
1205 /* Zero length element, corresponds to '::' */
1206 if (s
->zero_pos
== -1)
1207 s
->zero_pos
= s
->total
;
1208 /* If we've already got a :: its an error */
1209 else if (s
->zero_pos
!= s
->total
)
1213 /* If more than 4 characters could be final a.b.c.d form */
1215 /* Need at least 4 bytes left */
1218 /* Must be end of string */
1221 if (!ipv4_from_asc(s
->tmp
+ s
->total
, elem
))
1225 if (!ipv6_hex(s
->tmp
+ s
->total
, elem
, len
))
1234 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1237 static int ipv6_hex(unsigned char *out
, const char *in
, int inlen
)
1240 unsigned int num
= 0;
1248 x
= OPENSSL_hexchar2int(c
);
1254 out
[1] = num
& 0xff;
1258 int X509V3_NAME_from_section(X509_NAME
*nm
, STACK_OF(CONF_VALUE
) *dn_sk
,
1259 unsigned long chtype
)
1262 int i
, mval
, spec_char
, plus_char
;
1268 for (i
= 0; i
< sk_CONF_VALUE_num(dn_sk
); i
++) {
1269 v
= sk_CONF_VALUE_value(dn_sk
, i
);
1272 * Skip past any leading X. X: X, etc to allow for multiple instances
1274 for (p
= type
; *p
; p
++) {
1275 #ifndef CHARSET_EBCDIC
1276 spec_char
= ((*p
== ':') || (*p
== ',') || (*p
== '.'));
1278 spec_char
= ((*p
== os_toascii
[':']) || (*p
== os_toascii
[','])
1279 || (*p
== os_toascii
['.']));
1288 #ifndef CHARSET_EBCDIC
1289 plus_char
= (*type
== '+');
1291 plus_char
= (*type
== os_toascii
['+']);
1299 if (!X509_NAME_add_entry_by_txt(nm
, type
, chtype
,
1300 (unsigned char *)v
->value
, -1, -1,