2 * Copyright 2006-2021 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
11 * Implementation of RFC 3779 section 2.2.
19 #include "internal/cryptlib.h"
20 #include <openssl/conf.h>
21 #include <openssl/asn1.h>
22 #include <openssl/asn1t.h>
23 #include <openssl/buffer.h>
24 #include <openssl/x509v3.h>
25 #include "crypto/x509.h"
27 #include "x509_local.h"
29 #ifndef OPENSSL_NO_RFC3779
32 * OpenSSL ASN.1 template translation of RFC 3779 2.2.3.
35 ASN1_SEQUENCE(IPAddressRange
) = {
36 ASN1_SIMPLE(IPAddressRange
, min
, ASN1_BIT_STRING
),
37 ASN1_SIMPLE(IPAddressRange
, max
, ASN1_BIT_STRING
)
38 } ASN1_SEQUENCE_END(IPAddressRange
)
40 ASN1_CHOICE(IPAddressOrRange
) = {
41 ASN1_SIMPLE(IPAddressOrRange
, u
.addressPrefix
, ASN1_BIT_STRING
),
42 ASN1_SIMPLE(IPAddressOrRange
, u
.addressRange
, IPAddressRange
)
43 } ASN1_CHOICE_END(IPAddressOrRange
)
45 ASN1_CHOICE(IPAddressChoice
) = {
46 ASN1_SIMPLE(IPAddressChoice
, u
.inherit
, ASN1_NULL
),
47 ASN1_SEQUENCE_OF(IPAddressChoice
, u
.addressesOrRanges
, IPAddressOrRange
)
48 } ASN1_CHOICE_END(IPAddressChoice
)
50 ASN1_SEQUENCE(IPAddressFamily
) = {
51 ASN1_SIMPLE(IPAddressFamily
, addressFamily
, ASN1_OCTET_STRING
),
52 ASN1_SIMPLE(IPAddressFamily
, ipAddressChoice
, IPAddressChoice
)
53 } ASN1_SEQUENCE_END(IPAddressFamily
)
55 ASN1_ITEM_TEMPLATE(IPAddrBlocks
) =
56 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF
, 0,
57 IPAddrBlocks
, IPAddressFamily
)
58 static_ASN1_ITEM_TEMPLATE_END(IPAddrBlocks
)
60 IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange
)
61 IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange
)
62 IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice
)
63 IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily
)
66 * How much buffer space do we need for a raw address?
68 # define ADDR_RAW_BUF_LEN 16
71 * What's the address length associated with this AFI?
73 static int length_from_afi(const unsigned afi
)
86 * Extract the AFI from an IPAddressFamily.
88 unsigned int X509v3_addr_get_afi(const IPAddressFamily
*f
)
91 || f
->addressFamily
== NULL
92 || f
->addressFamily
->data
== NULL
93 || f
->addressFamily
->length
< 2)
95 return (f
->addressFamily
->data
[0] << 8) | f
->addressFamily
->data
[1];
99 * Expand the bitstring form of an address into a raw byte array.
100 * At the moment this is coded for simplicity, not speed.
102 static int addr_expand(unsigned char *addr
,
103 const ASN1_BIT_STRING
*bs
,
104 const int length
, const unsigned char fill
)
106 if (bs
->length
< 0 || bs
->length
> length
)
108 if (bs
->length
> 0) {
109 memcpy(addr
, bs
->data
, bs
->length
);
110 if ((bs
->flags
& 7) != 0) {
111 unsigned char mask
= 0xFF >> (8 - (bs
->flags
& 7));
114 addr
[bs
->length
- 1] &= ~mask
;
116 addr
[bs
->length
- 1] |= mask
;
119 memset(addr
+ bs
->length
, fill
, length
- bs
->length
);
124 * Extract the prefix length from a bitstring.
126 # define addr_prefixlen(bs) ((int)((bs)->length * 8 - ((bs)->flags & 7)))
129 * i2r handler for one address bitstring.
131 static int i2r_address(BIO
*out
,
133 const unsigned char fill
, const ASN1_BIT_STRING
*bs
)
135 unsigned char addr
[ADDR_RAW_BUF_LEN
];
142 if (!addr_expand(addr
, bs
, 4, fill
))
144 BIO_printf(out
, "%d.%d.%d.%d", addr
[0], addr
[1], addr
[2], addr
[3]);
147 if (!addr_expand(addr
, bs
, 16, fill
))
149 for (n
= 16; n
> 1 && addr
[n
- 1] == 0x00 && addr
[n
- 2] == 0x00;
151 for (i
= 0; i
< n
; i
+= 2)
152 BIO_printf(out
, "%x%s", (addr
[i
] << 8) | addr
[i
+ 1],
153 (i
< 14 ? ":" : ""));
160 for (i
= 0; i
< bs
->length
; i
++)
161 BIO_printf(out
, "%s%02x", (i
> 0 ? ":" : ""), bs
->data
[i
]);
162 BIO_printf(out
, "[%d]", (int)(bs
->flags
& 7));
169 * i2r handler for a sequence of addresses and ranges.
171 static int i2r_IPAddressOrRanges(BIO
*out
,
173 const IPAddressOrRanges
*aors
,
178 for (i
= 0; i
< sk_IPAddressOrRange_num(aors
); i
++) {
179 const IPAddressOrRange
*aor
= sk_IPAddressOrRange_value(aors
, i
);
181 BIO_printf(out
, "%*s", indent
, "");
183 case IPAddressOrRange_addressPrefix
:
184 if (!i2r_address(out
, afi
, 0x00, aor
->u
.addressPrefix
))
186 BIO_printf(out
, "/%d\n", addr_prefixlen(aor
->u
.addressPrefix
));
188 case IPAddressOrRange_addressRange
:
189 if (!i2r_address(out
, afi
, 0x00, aor
->u
.addressRange
->min
))
192 if (!i2r_address(out
, afi
, 0xFF, aor
->u
.addressRange
->max
))
202 * i2r handler for an IPAddrBlocks extension.
204 static int i2r_IPAddrBlocks(const X509V3_EXT_METHOD
*method
,
205 void *ext
, BIO
*out
, int indent
)
207 const IPAddrBlocks
*addr
= ext
;
210 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
211 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
212 const unsigned int afi
= X509v3_addr_get_afi(f
);
216 BIO_printf(out
, "%*sIPv4", indent
, "");
219 BIO_printf(out
, "%*sIPv6", indent
, "");
222 BIO_printf(out
, "%*sUnknown AFI %u", indent
, "", afi
);
225 if (f
->addressFamily
->length
> 2) {
226 switch (f
->addressFamily
->data
[2]) {
228 BIO_puts(out
, " (Unicast)");
231 BIO_puts(out
, " (Multicast)");
234 BIO_puts(out
, " (Unicast/Multicast)");
237 BIO_puts(out
, " (MPLS)");
240 BIO_puts(out
, " (Tunnel)");
243 BIO_puts(out
, " (VPLS)");
246 BIO_puts(out
, " (BGP MDT)");
249 BIO_puts(out
, " (MPLS-labeled VPN)");
252 BIO_printf(out
, " (Unknown SAFI %u)",
253 (unsigned)f
->addressFamily
->data
[2]);
257 switch (f
->ipAddressChoice
->type
) {
258 case IPAddressChoice_inherit
:
259 BIO_puts(out
, ": inherit\n");
261 case IPAddressChoice_addressesOrRanges
:
262 BIO_puts(out
, ":\n");
263 if (!i2r_IPAddressOrRanges(out
,
266 u
.addressesOrRanges
, afi
))
275 * Sort comparison function for a sequence of IPAddressOrRange
278 * There's no sane answer we can give if addr_expand() fails, and an
279 * assertion failure on externally supplied data is seriously uncool,
280 * so we just arbitrarily declare that if given invalid inputs this
281 * function returns -1. If this messes up your preferred sort order
282 * for garbage input, tough noogies.
284 static int IPAddressOrRange_cmp(const IPAddressOrRange
*a
,
285 const IPAddressOrRange
*b
, const int length
)
287 unsigned char addr_a
[ADDR_RAW_BUF_LEN
], addr_b
[ADDR_RAW_BUF_LEN
];
288 int prefixlen_a
= 0, prefixlen_b
= 0;
292 case IPAddressOrRange_addressPrefix
:
293 if (!addr_expand(addr_a
, a
->u
.addressPrefix
, length
, 0x00))
295 prefixlen_a
= addr_prefixlen(a
->u
.addressPrefix
);
297 case IPAddressOrRange_addressRange
:
298 if (!addr_expand(addr_a
, a
->u
.addressRange
->min
, length
, 0x00))
300 prefixlen_a
= length
* 8;
305 case IPAddressOrRange_addressPrefix
:
306 if (!addr_expand(addr_b
, b
->u
.addressPrefix
, length
, 0x00))
308 prefixlen_b
= addr_prefixlen(b
->u
.addressPrefix
);
310 case IPAddressOrRange_addressRange
:
311 if (!addr_expand(addr_b
, b
->u
.addressRange
->min
, length
, 0x00))
313 prefixlen_b
= length
* 8;
317 if ((r
= memcmp(addr_a
, addr_b
, length
)) != 0)
320 return prefixlen_a
- prefixlen_b
;
324 * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort()
325 * comparison routines are only allowed two arguments.
327 static int v4IPAddressOrRange_cmp(const IPAddressOrRange
*const *a
,
328 const IPAddressOrRange
*const *b
)
330 return IPAddressOrRange_cmp(*a
, *b
, 4);
334 * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort()
335 * comparison routines are only allowed two arguments.
337 static int v6IPAddressOrRange_cmp(const IPAddressOrRange
*const *a
,
338 const IPAddressOrRange
*const *b
)
340 return IPAddressOrRange_cmp(*a
, *b
, 16);
344 * Calculate whether a range collapses to a prefix.
345 * See last paragraph of RFC 3779 2.2.3.7.
347 static int range_should_be_prefix(const unsigned char *min
,
348 const unsigned char *max
, const int length
)
354 * It is the responsibility of the caller to confirm min <= max. We don't
355 * use ossl_assert() here since we have no way of signalling an error from
356 * this function - so we just use a plain assert instead.
358 assert(memcmp(min
, max
, length
) <= 0);
360 for (i
= 0; i
< length
&& min
[i
] == max
[i
]; i
++) ;
361 for (j
= length
- 1; j
>= 0 && min
[j
] == 0x00 && max
[j
] == 0xFF; j
--) ;
366 mask
= min
[i
] ^ max
[i
];
392 if ((min
[i
] & mask
) != 0 || (max
[i
] & mask
) != mask
)
399 * Construct a prefix.
401 static int make_addressPrefix(IPAddressOrRange
**result
, unsigned char *addr
,
402 const int prefixlen
, const int afilen
)
404 int bytelen
= (prefixlen
+ 7) / 8, bitlen
= prefixlen
% 8;
405 IPAddressOrRange
*aor
= IPAddressOrRange_new();
407 if (prefixlen
< 0 || prefixlen
> (afilen
* 8))
411 aor
->type
= IPAddressOrRange_addressPrefix
;
412 if (aor
->u
.addressPrefix
== NULL
&&
413 (aor
->u
.addressPrefix
= ASN1_BIT_STRING_new()) == NULL
)
415 if (!ASN1_BIT_STRING_set(aor
->u
.addressPrefix
, addr
, bytelen
))
418 aor
->u
.addressPrefix
->data
[bytelen
- 1] &= ~(0xFF >> bitlen
);
419 ossl_asn1_string_set_bits_left(aor
->u
.addressPrefix
, 8 - bitlen
);
425 IPAddressOrRange_free(aor
);
430 * Construct a range. If it can be expressed as a prefix,
431 * return a prefix instead. Doing this here simplifies
432 * the rest of the code considerably.
434 static int make_addressRange(IPAddressOrRange
**result
,
436 unsigned char *max
, const int length
)
438 IPAddressOrRange
*aor
;
441 if (memcmp(min
, max
, length
) > 0)
444 if ((prefixlen
= range_should_be_prefix(min
, max
, length
)) >= 0)
445 return make_addressPrefix(result
, min
, prefixlen
, length
);
447 if ((aor
= IPAddressOrRange_new()) == NULL
)
449 aor
->type
= IPAddressOrRange_addressRange
;
450 if ((aor
->u
.addressRange
= IPAddressRange_new()) == NULL
)
452 if (aor
->u
.addressRange
->min
== NULL
&&
453 (aor
->u
.addressRange
->min
= ASN1_BIT_STRING_new()) == NULL
)
455 if (aor
->u
.addressRange
->max
== NULL
&&
456 (aor
->u
.addressRange
->max
= ASN1_BIT_STRING_new()) == NULL
)
459 for (i
= length
; i
> 0 && min
[i
- 1] == 0x00; --i
) ;
460 if (!ASN1_BIT_STRING_set(aor
->u
.addressRange
->min
, min
, i
))
462 ossl_asn1_string_set_bits_left(aor
->u
.addressRange
->min
, 0);
464 unsigned char b
= min
[i
- 1];
467 while ((b
& (0xFFU
>> j
)) != 0)
469 aor
->u
.addressRange
->min
->flags
|= 8 - j
;
472 for (i
= length
; i
> 0 && max
[i
- 1] == 0xFF; --i
) ;
473 if (!ASN1_BIT_STRING_set(aor
->u
.addressRange
->max
, max
, i
))
475 ossl_asn1_string_set_bits_left(aor
->u
.addressRange
->max
, 0);
477 unsigned char b
= max
[i
- 1];
480 while ((b
& (0xFFU
>> j
)) != (0xFFU
>> j
))
482 aor
->u
.addressRange
->max
->flags
|= 8 - j
;
489 IPAddressOrRange_free(aor
);
494 * Construct a new address family or find an existing one.
496 static IPAddressFamily
*make_IPAddressFamily(IPAddrBlocks
*addr
,
498 const unsigned *safi
)
501 unsigned char key
[3];
505 key
[0] = (afi
>> 8) & 0xFF;
508 key
[2] = *safi
& 0xFF;
514 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
515 f
= sk_IPAddressFamily_value(addr
, i
);
516 if (f
->addressFamily
->length
== keylen
&&
517 !memcmp(f
->addressFamily
->data
, key
, keylen
))
521 if ((f
= IPAddressFamily_new()) == NULL
)
523 if (f
->ipAddressChoice
== NULL
&&
524 (f
->ipAddressChoice
= IPAddressChoice_new()) == NULL
)
526 if (f
->addressFamily
== NULL
&&
527 (f
->addressFamily
= ASN1_OCTET_STRING_new()) == NULL
)
529 if (!ASN1_OCTET_STRING_set(f
->addressFamily
, key
, keylen
))
531 if (!sk_IPAddressFamily_push(addr
, f
))
537 IPAddressFamily_free(f
);
542 * Add an inheritance element.
544 int X509v3_addr_add_inherit(IPAddrBlocks
*addr
,
545 const unsigned afi
, const unsigned *safi
)
547 IPAddressFamily
*f
= make_IPAddressFamily(addr
, afi
, safi
);
550 f
->ipAddressChoice
== NULL
||
551 (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
&&
552 f
->ipAddressChoice
->u
.addressesOrRanges
!= NULL
))
554 if (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
&&
555 f
->ipAddressChoice
->u
.inherit
!= NULL
)
557 if (f
->ipAddressChoice
->u
.inherit
== NULL
&&
558 (f
->ipAddressChoice
->u
.inherit
= ASN1_NULL_new()) == NULL
)
560 f
->ipAddressChoice
->type
= IPAddressChoice_inherit
;
565 * Construct an IPAddressOrRange sequence, or return an existing one.
567 static IPAddressOrRanges
*make_prefix_or_range(IPAddrBlocks
*addr
,
569 const unsigned *safi
)
571 IPAddressFamily
*f
= make_IPAddressFamily(addr
, afi
, safi
);
572 IPAddressOrRanges
*aors
= NULL
;
575 f
->ipAddressChoice
== NULL
||
576 (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
&&
577 f
->ipAddressChoice
->u
.inherit
!= NULL
))
579 if (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
)
580 aors
= f
->ipAddressChoice
->u
.addressesOrRanges
;
583 if ((aors
= sk_IPAddressOrRange_new_null()) == NULL
)
587 (void)sk_IPAddressOrRange_set_cmp_func(aors
, v4IPAddressOrRange_cmp
);
590 (void)sk_IPAddressOrRange_set_cmp_func(aors
, v6IPAddressOrRange_cmp
);
593 f
->ipAddressChoice
->type
= IPAddressChoice_addressesOrRanges
;
594 f
->ipAddressChoice
->u
.addressesOrRanges
= aors
;
601 int X509v3_addr_add_prefix(IPAddrBlocks
*addr
,
603 const unsigned *safi
,
604 unsigned char *a
, const int prefixlen
)
606 IPAddressOrRanges
*aors
= make_prefix_or_range(addr
, afi
, safi
);
607 IPAddressOrRange
*aor
;
610 || !make_addressPrefix(&aor
, a
, prefixlen
, length_from_afi(afi
)))
612 if (sk_IPAddressOrRange_push(aors
, aor
))
614 IPAddressOrRange_free(aor
);
621 int X509v3_addr_add_range(IPAddrBlocks
*addr
,
623 const unsigned *safi
,
624 unsigned char *min
, unsigned char *max
)
626 IPAddressOrRanges
*aors
= make_prefix_or_range(addr
, afi
, safi
);
627 IPAddressOrRange
*aor
;
628 int length
= length_from_afi(afi
);
632 if (!make_addressRange(&aor
, min
, max
, length
))
634 if (sk_IPAddressOrRange_push(aors
, aor
))
636 IPAddressOrRange_free(aor
);
641 * Extract min and max values from an IPAddressOrRange.
643 static int extract_min_max(IPAddressOrRange
*aor
,
644 unsigned char *min
, unsigned char *max
, int length
)
646 if (aor
== NULL
|| min
== NULL
|| max
== NULL
)
649 case IPAddressOrRange_addressPrefix
:
650 return (addr_expand(min
, aor
->u
.addressPrefix
, length
, 0x00) &&
651 addr_expand(max
, aor
->u
.addressPrefix
, length
, 0xFF));
652 case IPAddressOrRange_addressRange
:
653 return (addr_expand(min
, aor
->u
.addressRange
->min
, length
, 0x00) &&
654 addr_expand(max
, aor
->u
.addressRange
->max
, length
, 0xFF));
660 * Public wrapper for extract_min_max().
662 int X509v3_addr_get_range(IPAddressOrRange
*aor
,
665 unsigned char *max
, const int length
)
667 int afi_length
= length_from_afi(afi
);
669 if (aor
== NULL
|| min
== NULL
|| max
== NULL
||
670 afi_length
== 0 || length
< afi_length
||
671 (aor
->type
!= IPAddressOrRange_addressPrefix
&&
672 aor
->type
!= IPAddressOrRange_addressRange
) ||
673 !extract_min_max(aor
, min
, max
, afi_length
))
680 * Sort comparison function for a sequence of IPAddressFamily.
682 * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about
683 * the ordering: I can read it as meaning that IPv6 without a SAFI
684 * comes before IPv4 with a SAFI, which seems pretty weird. The
685 * examples in appendix B suggest that the author intended the
686 * null-SAFI rule to apply only within a single AFI, which is what I
687 * would have expected and is what the following code implements.
689 static int IPAddressFamily_cmp(const IPAddressFamily
*const *a_
,
690 const IPAddressFamily
*const *b_
)
692 const ASN1_OCTET_STRING
*a
= (*a_
)->addressFamily
;
693 const ASN1_OCTET_STRING
*b
= (*b_
)->addressFamily
;
694 int len
= ((a
->length
<= b
->length
) ? a
->length
: b
->length
);
695 int cmp
= memcmp(a
->data
, b
->data
, len
);
697 return cmp
? cmp
: a
->length
- b
->length
;
701 * Check whether an IPAddrBLocks is in canonical form.
703 int X509v3_addr_is_canonical(IPAddrBlocks
*addr
)
705 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
706 unsigned char b_min
[ADDR_RAW_BUF_LEN
], b_max
[ADDR_RAW_BUF_LEN
];
707 IPAddressOrRanges
*aors
;
711 * Empty extension is canonical.
717 * Check whether the top-level list is in order.
719 for (i
= 0; i
< sk_IPAddressFamily_num(addr
) - 1; i
++) {
720 const IPAddressFamily
*a
= sk_IPAddressFamily_value(addr
, i
);
721 const IPAddressFamily
*b
= sk_IPAddressFamily_value(addr
, i
+ 1);
723 if (IPAddressFamily_cmp(&a
, &b
) >= 0)
728 * Top level's ok, now check each address family.
730 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
731 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
732 int length
= length_from_afi(X509v3_addr_get_afi(f
));
735 * Inheritance is canonical. Anything other than inheritance or
736 * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something.
738 if (f
== NULL
|| f
->ipAddressChoice
== NULL
)
740 switch (f
->ipAddressChoice
->type
) {
741 case IPAddressChoice_inherit
:
743 case IPAddressChoice_addressesOrRanges
:
750 * It's an IPAddressOrRanges sequence, check it.
752 aors
= f
->ipAddressChoice
->u
.addressesOrRanges
;
753 if (sk_IPAddressOrRange_num(aors
) == 0)
755 for (j
= 0; j
< sk_IPAddressOrRange_num(aors
) - 1; j
++) {
756 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
757 IPAddressOrRange
*b
= sk_IPAddressOrRange_value(aors
, j
+ 1);
759 if (!extract_min_max(a
, a_min
, a_max
, length
) ||
760 !extract_min_max(b
, b_min
, b_max
, length
))
764 * Punt misordered list, overlapping start, or inverted range.
766 if (memcmp(a_min
, b_min
, length
) >= 0 ||
767 memcmp(a_min
, a_max
, length
) > 0 ||
768 memcmp(b_min
, b_max
, length
) > 0)
772 * Punt if adjacent or overlapping. Check for adjacency by
773 * subtracting one from b_min first.
775 for (k
= length
- 1; k
>= 0 && b_min
[k
]-- == 0x00; k
--) ;
776 if (memcmp(a_max
, b_min
, length
) >= 0)
780 * Check for range that should be expressed as a prefix.
782 if (a
->type
== IPAddressOrRange_addressRange
&&
783 range_should_be_prefix(a_min
, a_max
, length
) >= 0)
788 * Check range to see if it's inverted or should be a
791 j
= sk_IPAddressOrRange_num(aors
) - 1;
793 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
795 if (a
!= NULL
&& a
->type
== IPAddressOrRange_addressRange
) {
796 if (!extract_min_max(a
, a_min
, a_max
, length
))
798 if (memcmp(a_min
, a_max
, length
) > 0 ||
799 range_should_be_prefix(a_min
, a_max
, length
) >= 0)
806 * If we made it through all that, we're happy.
812 * Whack an IPAddressOrRanges into canonical form.
814 static int IPAddressOrRanges_canonize(IPAddressOrRanges
*aors
,
817 int i
, j
, length
= length_from_afi(afi
);
820 * Sort the IPAddressOrRanges sequence.
822 sk_IPAddressOrRange_sort(aors
);
825 * Clean up representation issues, punt on duplicates or overlaps.
827 for (i
= 0; i
< sk_IPAddressOrRange_num(aors
) - 1; i
++) {
828 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, i
);
829 IPAddressOrRange
*b
= sk_IPAddressOrRange_value(aors
, i
+ 1);
830 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
831 unsigned char b_min
[ADDR_RAW_BUF_LEN
], b_max
[ADDR_RAW_BUF_LEN
];
833 if (!extract_min_max(a
, a_min
, a_max
, length
) ||
834 !extract_min_max(b
, b_min
, b_max
, length
))
838 * Punt inverted ranges.
840 if (memcmp(a_min
, a_max
, length
) > 0 ||
841 memcmp(b_min
, b_max
, length
) > 0)
847 if (memcmp(a_max
, b_min
, length
) >= 0)
851 * Merge if a and b are adjacent. We check for
852 * adjacency by subtracting one from b_min first.
854 for (j
= length
- 1; j
>= 0 && b_min
[j
]-- == 0x00; j
--) ;
855 if (memcmp(a_max
, b_min
, length
) == 0) {
856 IPAddressOrRange
*merged
;
858 if (!make_addressRange(&merged
, a_min
, b_max
, length
))
860 (void)sk_IPAddressOrRange_set(aors
, i
, merged
);
861 (void)sk_IPAddressOrRange_delete(aors
, i
+ 1);
862 IPAddressOrRange_free(a
);
863 IPAddressOrRange_free(b
);
870 * Check for inverted final range.
872 j
= sk_IPAddressOrRange_num(aors
) - 1;
874 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
876 if (a
!= NULL
&& a
->type
== IPAddressOrRange_addressRange
) {
877 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
879 if (!extract_min_max(a
, a_min
, a_max
, length
))
881 if (memcmp(a_min
, a_max
, length
) > 0)
890 * Whack an IPAddrBlocks extension into canonical form.
892 int X509v3_addr_canonize(IPAddrBlocks
*addr
)
896 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
897 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
899 if (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
&&
900 !IPAddressOrRanges_canonize(f
->ipAddressChoice
->
902 X509v3_addr_get_afi(f
)))
905 (void)sk_IPAddressFamily_set_cmp_func(addr
, IPAddressFamily_cmp
);
906 sk_IPAddressFamily_sort(addr
);
907 if (!ossl_assert(X509v3_addr_is_canonical(addr
)))
913 * v2i handler for the IPAddrBlocks extension.
915 static void *v2i_IPAddrBlocks(const struct v3_ext_method
*method
,
916 struct v3_ext_ctx
*ctx
,
917 STACK_OF(CONF_VALUE
) *values
)
919 static const char v4addr_chars
[] = "0123456789.";
920 static const char v6addr_chars
[] = "0123456789.:abcdefABCDEF";
921 IPAddrBlocks
*addr
= NULL
;
925 if ((addr
= sk_IPAddressFamily_new(IPAddressFamily_cmp
)) == NULL
) {
926 ERR_raise(ERR_LIB_X509V3
, ERR_R_CRYPTO_LIB
);
930 for (i
= 0; i
< sk_CONF_VALUE_num(values
); i
++) {
931 CONF_VALUE
*val
= sk_CONF_VALUE_value(values
, i
);
932 unsigned char min
[ADDR_RAW_BUF_LEN
], max
[ADDR_RAW_BUF_LEN
];
933 unsigned afi
, *safi
= NULL
, safi_
;
934 const char *addr_chars
= NULL
;
935 int prefixlen
, i1
, i2
, delim
, length
;
937 if (!ossl_v3_name_cmp(val
->name
, "IPv4")) {
939 } else if (!ossl_v3_name_cmp(val
->name
, "IPv6")) {
941 } else if (!ossl_v3_name_cmp(val
->name
, "IPv4-SAFI")) {
944 } else if (!ossl_v3_name_cmp(val
->name
, "IPv6-SAFI")) {
948 ERR_raise_data(ERR_LIB_X509V3
, X509V3_R_EXTENSION_NAME_ERROR
,
955 addr_chars
= v4addr_chars
;
958 addr_chars
= v6addr_chars
;
962 length
= length_from_afi(afi
);
965 * Handle SAFI, if any, and OPENSSL_strdup() so we can null-terminate
966 * the other input values.
969 *safi
= strtoul(val
->value
, &t
, 0);
970 t
+= strspn(t
, " \t");
971 if (*safi
> 0xFF || *t
++ != ':') {
972 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_SAFI
);
973 X509V3_conf_add_error_name_value(val
);
976 t
+= strspn(t
, " \t");
977 s
= OPENSSL_strdup(t
);
979 s
= OPENSSL_strdup(val
->value
);
985 * Check for inheritance. Not worth additional complexity to
986 * optimize this (seldom-used) case.
988 if (strcmp(s
, "inherit") == 0) {
989 if (!X509v3_addr_add_inherit(addr
, afi
, safi
)) {
990 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_INHERITANCE
);
991 X509V3_conf_add_error_name_value(val
);
999 i1
= strspn(s
, addr_chars
);
1000 i2
= i1
+ strspn(s
+ i1
, " \t");
1004 if (ossl_a2i_ipadd(min
, s
) != length
) {
1005 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_IPADDRESS
);
1006 X509V3_conf_add_error_name_value(val
);
1012 prefixlen
= (int)strtoul(s
+ i2
, &t
, 10);
1015 || prefixlen
> (length
* 8)
1017 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1018 X509V3_conf_add_error_name_value(val
);
1021 if (!X509v3_addr_add_prefix(addr
, afi
, safi
, min
, prefixlen
)) {
1022 ERR_raise(ERR_LIB_X509V3
, ERR_R_X509V3_LIB
);
1027 i1
= i2
+ strspn(s
+ i2
, " \t");
1028 i2
= i1
+ strspn(s
+ i1
, addr_chars
);
1029 if (i1
== i2
|| s
[i2
] != '\0') {
1030 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1031 X509V3_conf_add_error_name_value(val
);
1034 if (ossl_a2i_ipadd(max
, s
+ i1
) != length
) {
1035 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_IPADDRESS
);
1036 X509V3_conf_add_error_name_value(val
);
1039 if (memcmp(min
, max
, length_from_afi(afi
)) > 0) {
1040 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1041 X509V3_conf_add_error_name_value(val
);
1044 if (!X509v3_addr_add_range(addr
, afi
, safi
, min
, max
)) {
1045 ERR_raise(ERR_LIB_X509V3
, ERR_R_X509V3_LIB
);
1050 if (!X509v3_addr_add_prefix(addr
, afi
, safi
, min
, length
* 8)) {
1051 ERR_raise(ERR_LIB_X509V3
, ERR_R_X509V3_LIB
);
1056 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1057 X509V3_conf_add_error_name_value(val
);
1066 * Canonize the result, then we're done.
1068 if (!X509v3_addr_canonize(addr
))
1074 sk_IPAddressFamily_pop_free(addr
, IPAddressFamily_free
);
1081 const X509V3_EXT_METHOD ossl_v3_addr
= {
1082 NID_sbgp_ipAddrBlock
, /* nid */
1084 ASN1_ITEM_ref(IPAddrBlocks
), /* template */
1085 0, 0, 0, 0, /* old functions, ignored */
1089 v2i_IPAddrBlocks
, /* v2i */
1090 i2r_IPAddrBlocks
, /* i2r */
1092 NULL
/* extension-specific data */
1096 * Figure out whether extension sues inheritance.
1098 int X509v3_addr_inherits(IPAddrBlocks
*addr
)
1104 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
1105 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
1107 if (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
)
1114 * Figure out whether parent contains child.
1116 static int addr_contains(IPAddressOrRanges
*parent
,
1117 IPAddressOrRanges
*child
, int length
)
1119 unsigned char p_min
[ADDR_RAW_BUF_LEN
], p_max
[ADDR_RAW_BUF_LEN
];
1120 unsigned char c_min
[ADDR_RAW_BUF_LEN
], c_max
[ADDR_RAW_BUF_LEN
];
1123 if (child
== NULL
|| parent
== child
)
1129 for (c
= 0; c
< sk_IPAddressOrRange_num(child
); c
++) {
1130 if (!extract_min_max(sk_IPAddressOrRange_value(child
, c
),
1131 c_min
, c_max
, length
))
1134 if (p
>= sk_IPAddressOrRange_num(parent
))
1136 if (!extract_min_max(sk_IPAddressOrRange_value(parent
, p
),
1137 p_min
, p_max
, length
))
1139 if (memcmp(p_max
, c_max
, length
) < 0)
1141 if (memcmp(p_min
, c_min
, length
) > 0)
1151 * Test whether a is a subset of b.
1153 int X509v3_addr_subset(IPAddrBlocks
*a
, IPAddrBlocks
*b
)
1157 if (a
== NULL
|| a
== b
)
1159 if (b
== NULL
|| X509v3_addr_inherits(a
) || X509v3_addr_inherits(b
))
1161 (void)sk_IPAddressFamily_set_cmp_func(b
, IPAddressFamily_cmp
);
1162 for (i
= 0; i
< sk_IPAddressFamily_num(a
); i
++) {
1163 IPAddressFamily
*fa
= sk_IPAddressFamily_value(a
, i
);
1164 int j
= sk_IPAddressFamily_find(b
, fa
);
1165 IPAddressFamily
*fb
= sk_IPAddressFamily_value(b
, j
);
1169 if (!addr_contains(fb
->ipAddressChoice
->u
.addressesOrRanges
,
1170 fa
->ipAddressChoice
->u
.addressesOrRanges
,
1171 length_from_afi(X509v3_addr_get_afi(fb
))))
1178 * Validation error handling via callback.
1180 # define validation_err(_err_) \
1182 if (ctx != NULL) { \
1183 ctx->error = _err_; \
1184 ctx->error_depth = i; \
1185 ctx->current_cert = x; \
1186 ret = ctx->verify_cb(0, ctx); \
1195 * Core code for RFC 3779 2.3 path validation.
1197 * Returns 1 for success, 0 on error.
1199 * When returning 0, ctx->error MUST be set to an appropriate value other than
1202 static int addr_validate_path_internal(X509_STORE_CTX
*ctx
,
1203 STACK_OF(X509
) *chain
,
1206 IPAddrBlocks
*child
= NULL
;
1210 if (!ossl_assert(chain
!= NULL
&& sk_X509_num(chain
) > 0)
1211 || !ossl_assert(ctx
!= NULL
|| ext
!= NULL
)
1212 || !ossl_assert(ctx
== NULL
|| ctx
->verify_cb
!= NULL
)) {
1214 ctx
->error
= X509_V_ERR_UNSPECIFIED
;
1219 * Figure out where to start. If we don't have an extension to
1220 * check, we're done. Otherwise, check canonical form and
1221 * set up for walking up the chain.
1228 x
= sk_X509_value(chain
, i
);
1229 if ((ext
= x
->rfc3779_addr
) == NULL
)
1232 if (!X509v3_addr_is_canonical(ext
))
1233 validation_err(X509_V_ERR_INVALID_EXTENSION
);
1234 (void)sk_IPAddressFamily_set_cmp_func(ext
, IPAddressFamily_cmp
);
1235 if ((child
= sk_IPAddressFamily_dup(ext
)) == NULL
) {
1236 ERR_raise(ERR_LIB_X509V3
, ERR_R_CRYPTO_LIB
);
1238 ctx
->error
= X509_V_ERR_OUT_OF_MEM
;
1244 * Now walk up the chain. No cert may list resources that its
1245 * parent doesn't list.
1247 for (i
++; i
< sk_X509_num(chain
); i
++) {
1248 x
= sk_X509_value(chain
, i
);
1249 if (!X509v3_addr_is_canonical(x
->rfc3779_addr
))
1250 validation_err(X509_V_ERR_INVALID_EXTENSION
);
1251 if (x
->rfc3779_addr
== NULL
) {
1252 for (j
= 0; j
< sk_IPAddressFamily_num(child
); j
++) {
1253 IPAddressFamily
*fc
= sk_IPAddressFamily_value(child
, j
);
1255 if (fc
->ipAddressChoice
->type
!= IPAddressChoice_inherit
) {
1256 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1262 (void)sk_IPAddressFamily_set_cmp_func(x
->rfc3779_addr
,
1263 IPAddressFamily_cmp
);
1264 for (j
= 0; j
< sk_IPAddressFamily_num(child
); j
++) {
1265 IPAddressFamily
*fc
= sk_IPAddressFamily_value(child
, j
);
1266 int k
= sk_IPAddressFamily_find(x
->rfc3779_addr
, fc
);
1267 IPAddressFamily
*fp
=
1268 sk_IPAddressFamily_value(x
->rfc3779_addr
, k
);
1271 if (fc
->ipAddressChoice
->type
==
1272 IPAddressChoice_addressesOrRanges
) {
1273 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1278 if (fp
->ipAddressChoice
->type
==
1279 IPAddressChoice_addressesOrRanges
) {
1280 if (fc
->ipAddressChoice
->type
== IPAddressChoice_inherit
1281 || addr_contains(fp
->ipAddressChoice
->u
.addressesOrRanges
,
1282 fc
->ipAddressChoice
->u
.addressesOrRanges
,
1283 length_from_afi(X509v3_addr_get_afi(fc
))))
1284 (void)sk_IPAddressFamily_set(child
, j
, fp
);
1286 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1292 * Trust anchor can't inherit.
1294 if (x
->rfc3779_addr
!= NULL
) {
1295 for (j
= 0; j
< sk_IPAddressFamily_num(x
->rfc3779_addr
); j
++) {
1296 IPAddressFamily
*fp
= sk_IPAddressFamily_value(x
->rfc3779_addr
, j
);
1298 if (fp
->ipAddressChoice
->type
== IPAddressChoice_inherit
1299 && sk_IPAddressFamily_find(child
, fp
) >= 0)
1300 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1305 sk_IPAddressFamily_free(child
);
1309 # undef validation_err
1312 * RFC 3779 2.3 path validation -- called from X509_verify_cert().
1314 int X509v3_addr_validate_path(X509_STORE_CTX
*ctx
)
1316 if (ctx
->chain
== NULL
1317 || sk_X509_num(ctx
->chain
) == 0
1318 || ctx
->verify_cb
== NULL
) {
1319 ctx
->error
= X509_V_ERR_UNSPECIFIED
;
1322 return addr_validate_path_internal(ctx
, ctx
->chain
, NULL
);
1326 * RFC 3779 2.3 path validation of an extension.
1327 * Test whether chain covers extension.
1329 int X509v3_addr_validate_resource_set(STACK_OF(X509
) *chain
,
1330 IPAddrBlocks
*ext
, int allow_inheritance
)
1334 if (chain
== NULL
|| sk_X509_num(chain
) == 0)
1336 if (!allow_inheritance
&& X509v3_addr_inherits(ext
))
1338 return addr_validate_path_internal(NULL
, chain
, ext
);
1341 #endif /* OPENSSL_NO_RFC3779 */