2 * Copyright 2006-2020 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
11 * Implementation of RFC 3779 section 2.2.
17 #include "internal/cryptlib.h"
18 #include <openssl/conf.h>
19 #include <openssl/asn1.h>
20 #include <openssl/asn1t.h>
21 #include <openssl/buffer.h>
22 #include <openssl/x509v3.h>
23 #include "crypto/x509.h"
25 #include "x509_local.h"
27 #ifndef OPENSSL_NO_RFC3779
30 * OpenSSL ASN.1 template translation of RFC 3779 2.2.3.
33 ASN1_SEQUENCE(IPAddressRange
) = {
34 ASN1_SIMPLE(IPAddressRange
, min
, ASN1_BIT_STRING
),
35 ASN1_SIMPLE(IPAddressRange
, max
, ASN1_BIT_STRING
)
36 } ASN1_SEQUENCE_END(IPAddressRange
)
38 ASN1_CHOICE(IPAddressOrRange
) = {
39 ASN1_SIMPLE(IPAddressOrRange
, u
.addressPrefix
, ASN1_BIT_STRING
),
40 ASN1_SIMPLE(IPAddressOrRange
, u
.addressRange
, IPAddressRange
)
41 } ASN1_CHOICE_END(IPAddressOrRange
)
43 ASN1_CHOICE(IPAddressChoice
) = {
44 ASN1_SIMPLE(IPAddressChoice
, u
.inherit
, ASN1_NULL
),
45 ASN1_SEQUENCE_OF(IPAddressChoice
, u
.addressesOrRanges
, IPAddressOrRange
)
46 } ASN1_CHOICE_END(IPAddressChoice
)
48 ASN1_SEQUENCE(IPAddressFamily
) = {
49 ASN1_SIMPLE(IPAddressFamily
, addressFamily
, ASN1_OCTET_STRING
),
50 ASN1_SIMPLE(IPAddressFamily
, ipAddressChoice
, IPAddressChoice
)
51 } ASN1_SEQUENCE_END(IPAddressFamily
)
53 ASN1_ITEM_TEMPLATE(IPAddrBlocks
) =
54 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF
, 0,
55 IPAddrBlocks
, IPAddressFamily
)
56 static_ASN1_ITEM_TEMPLATE_END(IPAddrBlocks
)
58 IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange
)
59 IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange
)
60 IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice
)
61 IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily
)
64 * How much buffer space do we need for a raw address?
66 #define ADDR_RAW_BUF_LEN 16
69 * What's the address length associated with this AFI?
71 static int length_from_afi(const unsigned afi
)
84 * Extract the AFI from an IPAddressFamily.
86 unsigned int X509v3_addr_get_afi(const IPAddressFamily
*f
)
89 || f
->addressFamily
== NULL
90 || f
->addressFamily
->data
== NULL
91 || f
->addressFamily
->length
< 2)
93 return (f
->addressFamily
->data
[0] << 8) | f
->addressFamily
->data
[1];
97 * Expand the bitstring form of an address into a raw byte array.
98 * At the moment this is coded for simplicity, not speed.
100 static int addr_expand(unsigned char *addr
,
101 const ASN1_BIT_STRING
*bs
,
102 const int length
, const unsigned char fill
)
104 if (bs
->length
< 0 || bs
->length
> length
)
106 if (bs
->length
> 0) {
107 memcpy(addr
, bs
->data
, bs
->length
);
108 if ((bs
->flags
& 7) != 0) {
109 unsigned char mask
= 0xFF >> (8 - (bs
->flags
& 7));
111 addr
[bs
->length
- 1] &= ~mask
;
113 addr
[bs
->length
- 1] |= mask
;
116 memset(addr
+ bs
->length
, fill
, length
- bs
->length
);
121 * Extract the prefix length from a bitstring.
123 #define addr_prefixlen(bs) ((int) ((bs)->length * 8 - ((bs)->flags & 7)))
126 * i2r handler for one address bitstring.
128 static int i2r_address(BIO
*out
,
130 const unsigned char fill
, const ASN1_BIT_STRING
*bs
)
132 unsigned char addr
[ADDR_RAW_BUF_LEN
];
139 if (!addr_expand(addr
, bs
, 4, fill
))
141 BIO_printf(out
, "%d.%d.%d.%d", addr
[0], addr
[1], addr
[2], addr
[3]);
143 /* TODO possibly combine with ipaddr_to_asc() */
145 if (!addr_expand(addr
, bs
, 16, fill
))
147 for (n
= 16; n
> 1 && addr
[n
- 1] == 0x00 && addr
[n
- 2] == 0x00;
149 for (i
= 0; i
< n
; i
+= 2)
150 BIO_printf(out
, "%x%s", (addr
[i
] << 8) | addr
[i
+ 1],
151 (i
< 14 ? ":" : ""));
158 for (i
= 0; i
< bs
->length
; i
++)
159 BIO_printf(out
, "%s%02x", (i
> 0 ? ":" : ""), bs
->data
[i
]);
160 BIO_printf(out
, "[%d]", (int)(bs
->flags
& 7));
167 * i2r handler for a sequence of addresses and ranges.
169 static int i2r_IPAddressOrRanges(BIO
*out
,
171 const IPAddressOrRanges
*aors
,
175 for (i
= 0; i
< sk_IPAddressOrRange_num(aors
); i
++) {
176 const IPAddressOrRange
*aor
= sk_IPAddressOrRange_value(aors
, i
);
177 BIO_printf(out
, "%*s", indent
, "");
179 case IPAddressOrRange_addressPrefix
:
180 if (!i2r_address(out
, afi
, 0x00, aor
->u
.addressPrefix
))
182 BIO_printf(out
, "/%d\n", addr_prefixlen(aor
->u
.addressPrefix
));
184 case IPAddressOrRange_addressRange
:
185 if (!i2r_address(out
, afi
, 0x00, aor
->u
.addressRange
->min
))
188 if (!i2r_address(out
, afi
, 0xFF, aor
->u
.addressRange
->max
))
198 * i2r handler for an IPAddrBlocks extension.
200 static int i2r_IPAddrBlocks(const X509V3_EXT_METHOD
*method
,
201 void *ext
, BIO
*out
, int indent
)
203 const IPAddrBlocks
*addr
= ext
;
205 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
206 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
207 const unsigned int afi
= X509v3_addr_get_afi(f
);
210 BIO_printf(out
, "%*sIPv4", indent
, "");
213 BIO_printf(out
, "%*sIPv6", indent
, "");
216 BIO_printf(out
, "%*sUnknown AFI %u", indent
, "", afi
);
219 if (f
->addressFamily
->length
> 2) {
220 switch (f
->addressFamily
->data
[2]) {
222 BIO_puts(out
, " (Unicast)");
225 BIO_puts(out
, " (Multicast)");
228 BIO_puts(out
, " (Unicast/Multicast)");
231 BIO_puts(out
, " (MPLS)");
234 BIO_puts(out
, " (Tunnel)");
237 BIO_puts(out
, " (VPLS)");
240 BIO_puts(out
, " (BGP MDT)");
243 BIO_puts(out
, " (MPLS-labeled VPN)");
246 BIO_printf(out
, " (Unknown SAFI %u)",
247 (unsigned)f
->addressFamily
->data
[2]);
251 switch (f
->ipAddressChoice
->type
) {
252 case IPAddressChoice_inherit
:
253 BIO_puts(out
, ": inherit\n");
255 case IPAddressChoice_addressesOrRanges
:
256 BIO_puts(out
, ":\n");
257 if (!i2r_IPAddressOrRanges(out
,
260 u
.addressesOrRanges
, afi
))
269 * Sort comparison function for a sequence of IPAddressOrRange
272 * There's no sane answer we can give if addr_expand() fails, and an
273 * assertion failure on externally supplied data is seriously uncool,
274 * so we just arbitrarily declare that if given invalid inputs this
275 * function returns -1. If this messes up your preferred sort order
276 * for garbage input, tough noogies.
278 static int IPAddressOrRange_cmp(const IPAddressOrRange
*a
,
279 const IPAddressOrRange
*b
, const int length
)
281 unsigned char addr_a
[ADDR_RAW_BUF_LEN
], addr_b
[ADDR_RAW_BUF_LEN
];
282 int prefixlen_a
= 0, prefixlen_b
= 0;
286 case IPAddressOrRange_addressPrefix
:
287 if (!addr_expand(addr_a
, a
->u
.addressPrefix
, length
, 0x00))
289 prefixlen_a
= addr_prefixlen(a
->u
.addressPrefix
);
291 case IPAddressOrRange_addressRange
:
292 if (!addr_expand(addr_a
, a
->u
.addressRange
->min
, length
, 0x00))
294 prefixlen_a
= length
* 8;
299 case IPAddressOrRange_addressPrefix
:
300 if (!addr_expand(addr_b
, b
->u
.addressPrefix
, length
, 0x00))
302 prefixlen_b
= addr_prefixlen(b
->u
.addressPrefix
);
304 case IPAddressOrRange_addressRange
:
305 if (!addr_expand(addr_b
, b
->u
.addressRange
->min
, length
, 0x00))
307 prefixlen_b
= length
* 8;
311 if ((r
= memcmp(addr_a
, addr_b
, length
)) != 0)
314 return prefixlen_a
- prefixlen_b
;
318 * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort()
319 * comparison routines are only allowed two arguments.
321 static int v4IPAddressOrRange_cmp(const IPAddressOrRange
*const *a
,
322 const IPAddressOrRange
*const *b
)
324 return IPAddressOrRange_cmp(*a
, *b
, 4);
328 * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort()
329 * comparison routines are only allowed two arguments.
331 static int v6IPAddressOrRange_cmp(const IPAddressOrRange
*const *a
,
332 const IPAddressOrRange
*const *b
)
334 return IPAddressOrRange_cmp(*a
, *b
, 16);
338 * Calculate whether a range collapses to a prefix.
339 * See last paragraph of RFC 3779 2.2.3.7.
341 static int range_should_be_prefix(const unsigned char *min
,
342 const unsigned char *max
, const int length
)
347 if (memcmp(min
, max
, length
) <= 0)
349 for (i
= 0; i
< length
&& min
[i
] == max
[i
]; i
++) ;
350 for (j
= length
- 1; j
>= 0 && min
[j
] == 0x00 && max
[j
] == 0xFF; j
--) ;
355 mask
= min
[i
] ^ max
[i
];
381 if ((min
[i
] & mask
) != 0 || (max
[i
] & mask
) != mask
)
388 * Construct a prefix.
390 static int make_addressPrefix(IPAddressOrRange
**result
,
391 unsigned char *addr
, const int prefixlen
)
393 int bytelen
= (prefixlen
+ 7) / 8, bitlen
= prefixlen
% 8;
394 IPAddressOrRange
*aor
= IPAddressOrRange_new();
398 aor
->type
= IPAddressOrRange_addressPrefix
;
399 if (aor
->u
.addressPrefix
== NULL
&&
400 (aor
->u
.addressPrefix
= ASN1_BIT_STRING_new()) == NULL
)
402 if (!ASN1_BIT_STRING_set(aor
->u
.addressPrefix
, addr
, bytelen
))
404 aor
->u
.addressPrefix
->flags
&= ~7;
405 aor
->u
.addressPrefix
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
407 aor
->u
.addressPrefix
->data
[bytelen
- 1] &= ~(0xFF >> bitlen
);
408 aor
->u
.addressPrefix
->flags
|= 8 - bitlen
;
415 IPAddressOrRange_free(aor
);
420 * Construct a range. If it can be expressed as a prefix,
421 * return a prefix instead. Doing this here simplifies
422 * the rest of the code considerably.
424 static int make_addressRange(IPAddressOrRange
**result
,
426 unsigned char *max
, const int length
)
428 IPAddressOrRange
*aor
;
431 if ((prefixlen
= range_should_be_prefix(min
, max
, length
)) >= 0)
432 return make_addressPrefix(result
, min
, prefixlen
);
434 if ((aor
= IPAddressOrRange_new()) == NULL
)
436 aor
->type
= IPAddressOrRange_addressRange
;
437 if ((aor
->u
.addressRange
= IPAddressRange_new()) == NULL
)
439 if (aor
->u
.addressRange
->min
== NULL
&&
440 (aor
->u
.addressRange
->min
= ASN1_BIT_STRING_new()) == NULL
)
442 if (aor
->u
.addressRange
->max
== NULL
&&
443 (aor
->u
.addressRange
->max
= ASN1_BIT_STRING_new()) == NULL
)
446 for (i
= length
; i
> 0 && min
[i
- 1] == 0x00; --i
) ;
447 if (!ASN1_BIT_STRING_set(aor
->u
.addressRange
->min
, min
, i
))
449 aor
->u
.addressRange
->min
->flags
&= ~7;
450 aor
->u
.addressRange
->min
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
452 unsigned char b
= min
[i
- 1];
454 while ((b
& (0xFFU
>> j
)) != 0)
456 aor
->u
.addressRange
->min
->flags
|= 8 - j
;
459 for (i
= length
; i
> 0 && max
[i
- 1] == 0xFF; --i
) ;
460 if (!ASN1_BIT_STRING_set(aor
->u
.addressRange
->max
, max
, i
))
462 aor
->u
.addressRange
->max
->flags
&= ~7;
463 aor
->u
.addressRange
->max
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
465 unsigned char b
= max
[i
- 1];
467 while ((b
& (0xFFU
>> j
)) != (0xFFU
>> j
))
469 aor
->u
.addressRange
->max
->flags
|= 8 - j
;
476 IPAddressOrRange_free(aor
);
481 * Construct a new address family or find an existing one.
483 static IPAddressFamily
*make_IPAddressFamily(IPAddrBlocks
*addr
,
485 const unsigned *safi
)
488 unsigned char key
[3];
492 key
[0] = (afi
>> 8) & 0xFF;
495 key
[2] = *safi
& 0xFF;
501 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
502 f
= sk_IPAddressFamily_value(addr
, i
);
503 if (f
->addressFamily
->length
== keylen
&&
504 !memcmp(f
->addressFamily
->data
, key
, keylen
))
508 if ((f
= IPAddressFamily_new()) == NULL
)
510 if (f
->ipAddressChoice
== NULL
&&
511 (f
->ipAddressChoice
= IPAddressChoice_new()) == NULL
)
513 if (f
->addressFamily
== NULL
&&
514 (f
->addressFamily
= ASN1_OCTET_STRING_new()) == NULL
)
516 if (!ASN1_OCTET_STRING_set(f
->addressFamily
, key
, keylen
))
518 if (!sk_IPAddressFamily_push(addr
, f
))
524 IPAddressFamily_free(f
);
529 * Add an inheritance element.
531 int X509v3_addr_add_inherit(IPAddrBlocks
*addr
,
532 const unsigned afi
, const unsigned *safi
)
534 IPAddressFamily
*f
= make_IPAddressFamily(addr
, afi
, safi
);
536 f
->ipAddressChoice
== NULL
||
537 (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
&&
538 f
->ipAddressChoice
->u
.addressesOrRanges
!= NULL
))
540 if (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
&&
541 f
->ipAddressChoice
->u
.inherit
!= NULL
)
543 if (f
->ipAddressChoice
->u
.inherit
== NULL
&&
544 (f
->ipAddressChoice
->u
.inherit
= ASN1_NULL_new()) == NULL
)
546 f
->ipAddressChoice
->type
= IPAddressChoice_inherit
;
551 * Construct an IPAddressOrRange sequence, or return an existing one.
553 static IPAddressOrRanges
*make_prefix_or_range(IPAddrBlocks
*addr
,
555 const unsigned *safi
)
557 IPAddressFamily
*f
= make_IPAddressFamily(addr
, afi
, safi
);
558 IPAddressOrRanges
*aors
= NULL
;
561 f
->ipAddressChoice
== NULL
||
562 (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
&&
563 f
->ipAddressChoice
->u
.inherit
!= NULL
))
565 if (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
)
566 aors
= f
->ipAddressChoice
->u
.addressesOrRanges
;
569 if ((aors
= sk_IPAddressOrRange_new_null()) == NULL
)
573 (void)sk_IPAddressOrRange_set_cmp_func(aors
, v4IPAddressOrRange_cmp
);
576 (void)sk_IPAddressOrRange_set_cmp_func(aors
, v6IPAddressOrRange_cmp
);
579 f
->ipAddressChoice
->type
= IPAddressChoice_addressesOrRanges
;
580 f
->ipAddressChoice
->u
.addressesOrRanges
= aors
;
587 int X509v3_addr_add_prefix(IPAddrBlocks
*addr
,
589 const unsigned *safi
,
590 unsigned char *a
, const int prefixlen
)
592 IPAddressOrRanges
*aors
= make_prefix_or_range(addr
, afi
, safi
);
593 IPAddressOrRange
*aor
;
594 if (aors
== NULL
|| !make_addressPrefix(&aor
, a
, prefixlen
))
596 if (sk_IPAddressOrRange_push(aors
, aor
))
598 IPAddressOrRange_free(aor
);
605 int X509v3_addr_add_range(IPAddrBlocks
*addr
,
607 const unsigned *safi
,
608 unsigned char *min
, unsigned char *max
)
610 IPAddressOrRanges
*aors
= make_prefix_or_range(addr
, afi
, safi
);
611 IPAddressOrRange
*aor
;
612 int length
= length_from_afi(afi
);
615 if (!make_addressRange(&aor
, min
, max
, length
))
617 if (sk_IPAddressOrRange_push(aors
, aor
))
619 IPAddressOrRange_free(aor
);
624 * Extract min and max values from an IPAddressOrRange.
626 static int extract_min_max(IPAddressOrRange
*aor
,
627 unsigned char *min
, unsigned char *max
, int length
)
629 if (aor
== NULL
|| min
== NULL
|| max
== NULL
)
632 case IPAddressOrRange_addressPrefix
:
633 return (addr_expand(min
, aor
->u
.addressPrefix
, length
, 0x00) &&
634 addr_expand(max
, aor
->u
.addressPrefix
, length
, 0xFF));
635 case IPAddressOrRange_addressRange
:
636 return (addr_expand(min
, aor
->u
.addressRange
->min
, length
, 0x00) &&
637 addr_expand(max
, aor
->u
.addressRange
->max
, length
, 0xFF));
643 * Public wrapper for extract_min_max().
645 int X509v3_addr_get_range(IPAddressOrRange
*aor
,
648 unsigned char *max
, const int length
)
650 int afi_length
= length_from_afi(afi
);
651 if (aor
== NULL
|| min
== NULL
|| max
== NULL
||
652 afi_length
== 0 || length
< afi_length
||
653 (aor
->type
!= IPAddressOrRange_addressPrefix
&&
654 aor
->type
!= IPAddressOrRange_addressRange
) ||
655 !extract_min_max(aor
, min
, max
, afi_length
))
662 * Sort comparison function for a sequence of IPAddressFamily.
664 * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about
665 * the ordering: I can read it as meaning that IPv6 without a SAFI
666 * comes before IPv4 with a SAFI, which seems pretty weird. The
667 * examples in appendix B suggest that the author intended the
668 * null-SAFI rule to apply only within a single AFI, which is what I
669 * would have expected and is what the following code implements.
671 static int IPAddressFamily_cmp(const IPAddressFamily
*const *a_
,
672 const IPAddressFamily
*const *b_
)
674 const ASN1_OCTET_STRING
*a
= (*a_
)->addressFamily
;
675 const ASN1_OCTET_STRING
*b
= (*b_
)->addressFamily
;
676 int len
= ((a
->length
<= b
->length
) ? a
->length
: b
->length
);
677 int cmp
= memcmp(a
->data
, b
->data
, len
);
678 return cmp
? cmp
: a
->length
- b
->length
;
682 * Check whether an IPAddrBLocks is in canonical form.
684 int X509v3_addr_is_canonical(IPAddrBlocks
*addr
)
686 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
687 unsigned char b_min
[ADDR_RAW_BUF_LEN
], b_max
[ADDR_RAW_BUF_LEN
];
688 IPAddressOrRanges
*aors
;
692 * Empty extension is canonical.
698 * Check whether the top-level list is in order.
700 for (i
= 0; i
< sk_IPAddressFamily_num(addr
) - 1; i
++) {
701 const IPAddressFamily
*a
= sk_IPAddressFamily_value(addr
, i
);
702 const IPAddressFamily
*b
= sk_IPAddressFamily_value(addr
, i
+ 1);
703 if (IPAddressFamily_cmp(&a
, &b
) >= 0)
708 * Top level's ok, now check each address family.
710 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
711 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
712 int length
= length_from_afi(X509v3_addr_get_afi(f
));
715 * Inheritance is canonical. Anything other than inheritance or
716 * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something.
718 if (f
== NULL
|| f
->ipAddressChoice
== NULL
)
720 switch (f
->ipAddressChoice
->type
) {
721 case IPAddressChoice_inherit
:
723 case IPAddressChoice_addressesOrRanges
:
730 * It's an IPAddressOrRanges sequence, check it.
732 aors
= f
->ipAddressChoice
->u
.addressesOrRanges
;
733 if (sk_IPAddressOrRange_num(aors
) == 0)
735 for (j
= 0; j
< sk_IPAddressOrRange_num(aors
) - 1; j
++) {
736 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
737 IPAddressOrRange
*b
= sk_IPAddressOrRange_value(aors
, j
+ 1);
739 if (!extract_min_max(a
, a_min
, a_max
, length
) ||
740 !extract_min_max(b
, b_min
, b_max
, length
))
744 * Punt misordered list, overlapping start, or inverted range.
746 if (memcmp(a_min
, b_min
, length
) >= 0 ||
747 memcmp(a_min
, a_max
, length
) > 0 ||
748 memcmp(b_min
, b_max
, length
) > 0)
752 * Punt if adjacent or overlapping. Check for adjacency by
753 * subtracting one from b_min first.
755 for (k
= length
- 1; k
>= 0 && b_min
[k
]-- == 0x00; k
--) ;
756 if (memcmp(a_max
, b_min
, length
) >= 0)
760 * Check for range that should be expressed as a prefix.
762 if (a
->type
== IPAddressOrRange_addressRange
&&
763 range_should_be_prefix(a_min
, a_max
, length
) >= 0)
768 * Check range to see if it's inverted or should be a
771 j
= sk_IPAddressOrRange_num(aors
) - 1;
773 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
774 if (a
!= NULL
&& a
->type
== IPAddressOrRange_addressRange
) {
775 if (!extract_min_max(a
, a_min
, a_max
, length
))
777 if (memcmp(a_min
, a_max
, length
) > 0 ||
778 range_should_be_prefix(a_min
, a_max
, length
) >= 0)
785 * If we made it through all that, we're happy.
791 * Whack an IPAddressOrRanges into canonical form.
793 static int IPAddressOrRanges_canonize(IPAddressOrRanges
*aors
,
796 int i
, j
, length
= length_from_afi(afi
);
799 * Sort the IPAddressOrRanges sequence.
801 sk_IPAddressOrRange_sort(aors
);
804 * Clean up representation issues, punt on duplicates or overlaps.
806 for (i
= 0; i
< sk_IPAddressOrRange_num(aors
) - 1; i
++) {
807 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, i
);
808 IPAddressOrRange
*b
= sk_IPAddressOrRange_value(aors
, i
+ 1);
809 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
810 unsigned char b_min
[ADDR_RAW_BUF_LEN
], b_max
[ADDR_RAW_BUF_LEN
];
812 if (!extract_min_max(a
, a_min
, a_max
, length
) ||
813 !extract_min_max(b
, b_min
, b_max
, length
))
817 * Punt inverted ranges.
819 if (memcmp(a_min
, a_max
, length
) > 0 ||
820 memcmp(b_min
, b_max
, length
) > 0)
826 if (memcmp(a_max
, b_min
, length
) >= 0)
830 * Merge if a and b are adjacent. We check for
831 * adjacency by subtracting one from b_min first.
833 for (j
= length
- 1; j
>= 0 && b_min
[j
]-- == 0x00; j
--) ;
834 if (memcmp(a_max
, b_min
, length
) == 0) {
835 IPAddressOrRange
*merged
;
836 if (!make_addressRange(&merged
, a_min
, b_max
, length
))
838 (void)sk_IPAddressOrRange_set(aors
, i
, merged
);
839 (void)sk_IPAddressOrRange_delete(aors
, i
+ 1);
840 IPAddressOrRange_free(a
);
841 IPAddressOrRange_free(b
);
848 * Check for inverted final range.
850 j
= sk_IPAddressOrRange_num(aors
) - 1;
852 IPAddressOrRange
*a
= sk_IPAddressOrRange_value(aors
, j
);
853 if (a
!= NULL
&& a
->type
== IPAddressOrRange_addressRange
) {
854 unsigned char a_min
[ADDR_RAW_BUF_LEN
], a_max
[ADDR_RAW_BUF_LEN
];
855 if (!extract_min_max(a
, a_min
, a_max
, length
))
857 if (memcmp(a_min
, a_max
, length
) > 0)
866 * Whack an IPAddrBlocks extension into canonical form.
868 int X509v3_addr_canonize(IPAddrBlocks
*addr
)
871 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
872 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
873 if (f
->ipAddressChoice
->type
== IPAddressChoice_addressesOrRanges
&&
874 !IPAddressOrRanges_canonize(f
->ipAddressChoice
->
876 X509v3_addr_get_afi(f
)))
879 (void)sk_IPAddressFamily_set_cmp_func(addr
, IPAddressFamily_cmp
);
880 sk_IPAddressFamily_sort(addr
);
881 if (!ossl_assert(X509v3_addr_is_canonical(addr
)))
887 * v2i handler for the IPAddrBlocks extension.
889 static void *v2i_IPAddrBlocks(const struct v3_ext_method
*method
,
890 struct v3_ext_ctx
*ctx
,
891 STACK_OF(CONF_VALUE
) *values
)
893 static const char v4addr_chars
[] = "0123456789.";
894 static const char v6addr_chars
[] = "0123456789.:abcdefABCDEF";
895 IPAddrBlocks
*addr
= NULL
;
899 if ((addr
= sk_IPAddressFamily_new(IPAddressFamily_cmp
)) == NULL
) {
900 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
904 for (i
= 0; i
< sk_CONF_VALUE_num(values
); i
++) {
905 CONF_VALUE
*val
= sk_CONF_VALUE_value(values
, i
);
906 unsigned char min
[ADDR_RAW_BUF_LEN
], max
[ADDR_RAW_BUF_LEN
];
907 unsigned afi
, *safi
= NULL
, safi_
;
908 const char *addr_chars
= NULL
;
909 int prefixlen
, i1
, i2
, delim
, length
;
911 if (!v3_name_cmp(val
->name
, "IPv4")) {
913 } else if (!v3_name_cmp(val
->name
, "IPv6")) {
915 } else if (!v3_name_cmp(val
->name
, "IPv4-SAFI")) {
918 } else if (!v3_name_cmp(val
->name
, "IPv6-SAFI")) {
922 ERR_raise_data(ERR_LIB_X509V3
, X509V3_R_EXTENSION_NAME_ERROR
,
929 addr_chars
= v4addr_chars
;
932 addr_chars
= v6addr_chars
;
936 length
= length_from_afi(afi
);
939 * Handle SAFI, if any, and OPENSSL_strdup() so we can null-terminate
940 * the other input values.
943 *safi
= strtoul(val
->value
, &t
, 0);
944 t
+= strspn(t
, " \t");
945 if (*safi
> 0xFF || *t
++ != ':') {
946 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_SAFI
);
947 X509V3_conf_add_error_name_value(val
);
950 t
+= strspn(t
, " \t");
951 s
= OPENSSL_strdup(t
);
953 s
= OPENSSL_strdup(val
->value
);
956 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
961 * Check for inheritance. Not worth additional complexity to
962 * optimize this (seldom-used) case.
964 if (strcmp(s
, "inherit") == 0) {
965 if (!X509v3_addr_add_inherit(addr
, afi
, safi
)) {
966 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_INHERITANCE
);
967 X509V3_conf_add_error_name_value(val
);
975 i1
= strspn(s
, addr_chars
);
976 i2
= i1
+ strspn(s
+ i1
, " \t");
980 if (a2i_ipadd(min
, s
) != length
) {
981 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_IPADDRESS
);
982 X509V3_conf_add_error_name_value(val
);
988 prefixlen
= (int)strtoul(s
+ i2
, &t
, 10);
989 if (t
== s
+ i2
|| *t
!= '\0') {
990 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
991 X509V3_conf_add_error_name_value(val
);
994 if (!X509v3_addr_add_prefix(addr
, afi
, safi
, min
, prefixlen
)) {
995 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
1000 i1
= i2
+ strspn(s
+ i2
, " \t");
1001 i2
= i1
+ strspn(s
+ i1
, addr_chars
);
1002 if (i1
== i2
|| s
[i2
] != '\0') {
1003 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1004 X509V3_conf_add_error_name_value(val
);
1007 if (a2i_ipadd(max
, s
+ i1
) != length
) {
1008 ERR_raise(ERR_LIB_X509V3
, X509V3_R_INVALID_IPADDRESS
);
1009 X509V3_conf_add_error_name_value(val
);
1012 if (memcmp(min
, max
, length_from_afi(afi
)) > 0) {
1013 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1014 X509V3_conf_add_error_name_value(val
);
1017 if (!X509v3_addr_add_range(addr
, afi
, safi
, min
, max
)) {
1018 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
1023 if (!X509v3_addr_add_prefix(addr
, afi
, safi
, min
, length
* 8)) {
1024 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
1029 ERR_raise(ERR_LIB_X509V3
, X509V3_R_EXTENSION_VALUE_ERROR
);
1030 X509V3_conf_add_error_name_value(val
);
1039 * Canonize the result, then we're done.
1041 if (!X509v3_addr_canonize(addr
))
1047 sk_IPAddressFamily_pop_free(addr
, IPAddressFamily_free
);
1054 const X509V3_EXT_METHOD v3_addr
= {
1055 NID_sbgp_ipAddrBlock
, /* nid */
1057 ASN1_ITEM_ref(IPAddrBlocks
), /* template */
1058 0, 0, 0, 0, /* old functions, ignored */
1062 v2i_IPAddrBlocks
, /* v2i */
1063 i2r_IPAddrBlocks
, /* i2r */
1065 NULL
/* extension-specific data */
1069 * Figure out whether extension sues inheritance.
1071 int X509v3_addr_inherits(IPAddrBlocks
*addr
)
1076 for (i
= 0; i
< sk_IPAddressFamily_num(addr
); i
++) {
1077 IPAddressFamily
*f
= sk_IPAddressFamily_value(addr
, i
);
1078 if (f
->ipAddressChoice
->type
== IPAddressChoice_inherit
)
1085 * Figure out whether parent contains child.
1087 static int addr_contains(IPAddressOrRanges
*parent
,
1088 IPAddressOrRanges
*child
, int length
)
1090 unsigned char p_min
[ADDR_RAW_BUF_LEN
], p_max
[ADDR_RAW_BUF_LEN
];
1091 unsigned char c_min
[ADDR_RAW_BUF_LEN
], c_max
[ADDR_RAW_BUF_LEN
];
1094 if (child
== NULL
|| parent
== child
)
1100 for (c
= 0; c
< sk_IPAddressOrRange_num(child
); c
++) {
1101 if (!extract_min_max(sk_IPAddressOrRange_value(child
, c
),
1102 c_min
, c_max
, length
))
1105 if (p
>= sk_IPAddressOrRange_num(parent
))
1107 if (!extract_min_max(sk_IPAddressOrRange_value(parent
, p
),
1108 p_min
, p_max
, length
))
1110 if (memcmp(p_max
, c_max
, length
) < 0)
1112 if (memcmp(p_min
, c_min
, length
) > 0)
1122 * Test whether a is a subset of b.
1124 int X509v3_addr_subset(IPAddrBlocks
*a
, IPAddrBlocks
*b
)
1127 if (a
== NULL
|| a
== b
)
1129 if (b
== NULL
|| X509v3_addr_inherits(a
) || X509v3_addr_inherits(b
))
1131 (void)sk_IPAddressFamily_set_cmp_func(b
, IPAddressFamily_cmp
);
1132 for (i
= 0; i
< sk_IPAddressFamily_num(a
); i
++) {
1133 IPAddressFamily
*fa
= sk_IPAddressFamily_value(a
, i
);
1134 int j
= sk_IPAddressFamily_find(b
, fa
);
1135 IPAddressFamily
*fb
;
1136 fb
= sk_IPAddressFamily_value(b
, j
);
1139 if (!addr_contains(fb
->ipAddressChoice
->u
.addressesOrRanges
,
1140 fa
->ipAddressChoice
->u
.addressesOrRanges
,
1141 length_from_afi(X509v3_addr_get_afi(fb
))))
1148 * Validation error handling via callback.
1150 #define validation_err(_err_) \
1152 if (ctx != NULL) { \
1153 ctx->error = _err_; \
1154 ctx->error_depth = i; \
1155 ctx->current_cert = x; \
1156 ret = ctx->verify_cb(0, ctx); \
1165 * Core code for RFC 3779 2.3 path validation.
1167 * Returns 1 for success, 0 on error.
1169 * When returning 0, ctx->error MUST be set to an appropriate value other than
1172 static int addr_validate_path_internal(X509_STORE_CTX
*ctx
,
1173 STACK_OF(X509
) *chain
,
1176 IPAddrBlocks
*child
= NULL
;
1180 if (!ossl_assert(chain
!= NULL
&& sk_X509_num(chain
) > 0)
1181 || !ossl_assert(ctx
!= NULL
|| ext
!= NULL
)
1182 || !ossl_assert(ctx
== NULL
|| ctx
->verify_cb
!= NULL
)) {
1184 ctx
->error
= X509_V_ERR_UNSPECIFIED
;
1189 * Figure out where to start. If we don't have an extension to
1190 * check, we're done. Otherwise, check canonical form and
1191 * set up for walking up the chain.
1198 x
= sk_X509_value(chain
, i
);
1199 if ((ext
= x
->rfc3779_addr
) == NULL
)
1202 if (!X509v3_addr_is_canonical(ext
))
1203 validation_err(X509_V_ERR_INVALID_EXTENSION
);
1204 (void)sk_IPAddressFamily_set_cmp_func(ext
, IPAddressFamily_cmp
);
1205 if ((child
= sk_IPAddressFamily_dup(ext
)) == NULL
) {
1206 ERR_raise(ERR_LIB_X509V3
, ERR_R_MALLOC_FAILURE
);
1208 ctx
->error
= X509_V_ERR_OUT_OF_MEM
;
1214 * Now walk up the chain. No cert may list resources that its
1215 * parent doesn't list.
1217 for (i
++; i
< sk_X509_num(chain
); i
++) {
1218 x
= sk_X509_value(chain
, i
);
1219 if (!X509v3_addr_is_canonical(x
->rfc3779_addr
))
1220 validation_err(X509_V_ERR_INVALID_EXTENSION
);
1221 if (x
->rfc3779_addr
== NULL
) {
1222 for (j
= 0; j
< sk_IPAddressFamily_num(child
); j
++) {
1223 IPAddressFamily
*fc
= sk_IPAddressFamily_value(child
, j
);
1224 if (fc
->ipAddressChoice
->type
!= IPAddressChoice_inherit
) {
1225 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1231 (void)sk_IPAddressFamily_set_cmp_func(x
->rfc3779_addr
,
1232 IPAddressFamily_cmp
);
1233 for (j
= 0; j
< sk_IPAddressFamily_num(child
); j
++) {
1234 IPAddressFamily
*fc
= sk_IPAddressFamily_value(child
, j
);
1235 int k
= sk_IPAddressFamily_find(x
->rfc3779_addr
, fc
);
1236 IPAddressFamily
*fp
=
1237 sk_IPAddressFamily_value(x
->rfc3779_addr
, k
);
1239 if (fc
->ipAddressChoice
->type
==
1240 IPAddressChoice_addressesOrRanges
) {
1241 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1246 if (fp
->ipAddressChoice
->type
==
1247 IPAddressChoice_addressesOrRanges
) {
1248 if (fc
->ipAddressChoice
->type
== IPAddressChoice_inherit
1249 || addr_contains(fp
->ipAddressChoice
->u
.addressesOrRanges
,
1250 fc
->ipAddressChoice
->u
.addressesOrRanges
,
1251 length_from_afi(X509v3_addr_get_afi(fc
))))
1252 (void)sk_IPAddressFamily_set(child
, j
, fp
);
1254 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1260 * Trust anchor can't inherit.
1262 if (x
->rfc3779_addr
!= NULL
) {
1263 for (j
= 0; j
< sk_IPAddressFamily_num(x
->rfc3779_addr
); j
++) {
1264 IPAddressFamily
*fp
=
1265 sk_IPAddressFamily_value(x
->rfc3779_addr
, j
);
1266 if (fp
->ipAddressChoice
->type
== IPAddressChoice_inherit
1267 && sk_IPAddressFamily_find(child
, fp
) >= 0)
1268 validation_err(X509_V_ERR_UNNESTED_RESOURCE
);
1273 sk_IPAddressFamily_free(child
);
1277 #undef validation_err
1280 * RFC 3779 2.3 path validation -- called from X509_verify_cert().
1282 int X509v3_addr_validate_path(X509_STORE_CTX
*ctx
)
1284 if (ctx
->chain
== NULL
1285 || sk_X509_num(ctx
->chain
) == 0
1286 || ctx
->verify_cb
== NULL
) {
1287 ctx
->error
= X509_V_ERR_UNSPECIFIED
;
1290 return addr_validate_path_internal(ctx
, ctx
->chain
, NULL
);
1294 * RFC 3779 2.3 path validation of an extension.
1295 * Test whether chain covers extension.
1297 int X509v3_addr_validate_resource_set(STACK_OF(X509
) *chain
,
1298 IPAddrBlocks
*ext
, int allow_inheritance
)
1302 if (chain
== NULL
|| sk_X509_num(chain
) == 0)
1304 if (!allow_inheritance
&& X509v3_addr_inherits(ext
))
1306 return addr_validate_path_internal(NULL
, chain
, ext
);
1309 #endif /* OPENSSL_NO_RFC3779 */