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path: root/openssl/crypto/x509v3/v3_addr.c
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Diffstat (limited to 'openssl/crypto/x509v3/v3_addr.c')
-rw-r--r--openssl/crypto/x509v3/v3_addr.c2586
1 files changed, 1293 insertions, 1293 deletions
diff --git a/openssl/crypto/x509v3/v3_addr.c b/openssl/crypto/x509v3/v3_addr.c
index 247d671a8..0d70e8696 100644
--- a/openssl/crypto/x509v3/v3_addr.c
+++ b/openssl/crypto/x509v3/v3_addr.c
@@ -1,1293 +1,1293 @@
-/*
- * Contributed to the OpenSSL Project by the American Registry for
- * Internet Numbers ("ARIN").
- */
-/* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- */
-
-/*
- * Implementation of RFC 3779 section 2.2.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "cryptlib.h"
-#include <openssl/conf.h>
-#include <openssl/asn1.h>
-#include <openssl/asn1t.h>
-#include <openssl/buffer.h>
-#include <openssl/x509v3.h>
-
-#ifndef OPENSSL_NO_RFC3779
-
-/*
- * OpenSSL ASN.1 template translation of RFC 3779 2.2.3.
- */
-
-ASN1_SEQUENCE(IPAddressRange) = {
- ASN1_SIMPLE(IPAddressRange, min, ASN1_BIT_STRING),
- ASN1_SIMPLE(IPAddressRange, max, ASN1_BIT_STRING)
-} ASN1_SEQUENCE_END(IPAddressRange)
-
-ASN1_CHOICE(IPAddressOrRange) = {
- ASN1_SIMPLE(IPAddressOrRange, u.addressPrefix, ASN1_BIT_STRING),
- ASN1_SIMPLE(IPAddressOrRange, u.addressRange, IPAddressRange)
-} ASN1_CHOICE_END(IPAddressOrRange)
-
-ASN1_CHOICE(IPAddressChoice) = {
- ASN1_SIMPLE(IPAddressChoice, u.inherit, ASN1_NULL),
- ASN1_SEQUENCE_OF(IPAddressChoice, u.addressesOrRanges, IPAddressOrRange)
-} ASN1_CHOICE_END(IPAddressChoice)
-
-ASN1_SEQUENCE(IPAddressFamily) = {
- ASN1_SIMPLE(IPAddressFamily, addressFamily, ASN1_OCTET_STRING),
- ASN1_SIMPLE(IPAddressFamily, ipAddressChoice, IPAddressChoice)
-} ASN1_SEQUENCE_END(IPAddressFamily)
-
-ASN1_ITEM_TEMPLATE(IPAddrBlocks) =
- ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0,
- IPAddrBlocks, IPAddressFamily)
-ASN1_ITEM_TEMPLATE_END(IPAddrBlocks)
-
-IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange)
-IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange)
-IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice)
-IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily)
-
-/*
- * How much buffer space do we need for a raw address?
- */
-#define ADDR_RAW_BUF_LEN 16
-
-/*
- * What's the address length associated with this AFI?
- */
-static int length_from_afi(const unsigned afi)
-{
- switch (afi) {
- case IANA_AFI_IPV4:
- return 4;
- case IANA_AFI_IPV6:
- return 16;
- default:
- return 0;
- }
-}
-
-/*
- * Extract the AFI from an IPAddressFamily.
- */
-unsigned int v3_addr_get_afi(const IPAddressFamily *f)
-{
- return ((f != NULL &&
- f->addressFamily != NULL &&
- f->addressFamily->data != NULL)
- ? ((f->addressFamily->data[0] << 8) |
- (f->addressFamily->data[1]))
- : 0);
-}
-
-/*
- * Expand the bitstring form of an address into a raw byte array.
- * At the moment this is coded for simplicity, not speed.
- */
-static void addr_expand(unsigned char *addr,
- const ASN1_BIT_STRING *bs,
- const int length,
- const unsigned char fill)
-{
- OPENSSL_assert(bs->length >= 0 && bs->length <= length);
- if (bs->length > 0) {
- memcpy(addr, bs->data, bs->length);
- if ((bs->flags & 7) != 0) {
- unsigned char mask = 0xFF >> (8 - (bs->flags & 7));
- if (fill == 0)
- addr[bs->length - 1] &= ~mask;
- else
- addr[bs->length - 1] |= mask;
- }
- }
- memset(addr + bs->length, fill, length - bs->length);
-}
-
-/*
- * Extract the prefix length from a bitstring.
- */
-#define addr_prefixlen(bs) ((int) ((bs)->length * 8 - ((bs)->flags & 7)))
-
-/*
- * i2r handler for one address bitstring.
- */
-static int i2r_address(BIO *out,
- const unsigned afi,
- const unsigned char fill,
- const ASN1_BIT_STRING *bs)
-{
- unsigned char addr[ADDR_RAW_BUF_LEN];
- int i, n;
-
- if (bs->length < 0)
- return 0;
- switch (afi) {
- case IANA_AFI_IPV4:
- if (bs->length > 4)
- return 0;
- addr_expand(addr, bs, 4, fill);
- BIO_printf(out, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
- break;
- case IANA_AFI_IPV6:
- if (bs->length > 16)
- return 0;
- addr_expand(addr, bs, 16, fill);
- for (n = 16; n > 1 && addr[n-1] == 0x00 && addr[n-2] == 0x00; n -= 2)
- ;
- for (i = 0; i < n; i += 2)
- BIO_printf(out, "%x%s", (addr[i] << 8) | addr[i+1], (i < 14 ? ":" : ""));
- if (i < 16)
- BIO_puts(out, ":");
- if (i == 0)
- BIO_puts(out, ":");
- break;
- default:
- for (i = 0; i < bs->length; i++)
- BIO_printf(out, "%s%02x", (i > 0 ? ":" : ""), bs->data[i]);
- BIO_printf(out, "[%d]", (int) (bs->flags & 7));
- break;
- }
- return 1;
-}
-
-/*
- * i2r handler for a sequence of addresses and ranges.
- */
-static int i2r_IPAddressOrRanges(BIO *out,
- const int indent,
- const IPAddressOrRanges *aors,
- const unsigned afi)
-{
- int i;
- for (i = 0; i < sk_IPAddressOrRange_num(aors); i++) {
- const IPAddressOrRange *aor = sk_IPAddressOrRange_value(aors, i);
- BIO_printf(out, "%*s", indent, "");
- switch (aor->type) {
- case IPAddressOrRange_addressPrefix:
- if (!i2r_address(out, afi, 0x00, aor->u.addressPrefix))
- return 0;
- BIO_printf(out, "/%d\n", addr_prefixlen(aor->u.addressPrefix));
- continue;
- case IPAddressOrRange_addressRange:
- if (!i2r_address(out, afi, 0x00, aor->u.addressRange->min))
- return 0;
- BIO_puts(out, "-");
- if (!i2r_address(out, afi, 0xFF, aor->u.addressRange->max))
- return 0;
- BIO_puts(out, "\n");
- continue;
- }
- }
- return 1;
-}
-
-/*
- * i2r handler for an IPAddrBlocks extension.
- */
-static int i2r_IPAddrBlocks(const X509V3_EXT_METHOD *method,
- void *ext,
- BIO *out,
- int indent)
-{
- const IPAddrBlocks *addr = ext;
- int i;
- for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
- IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
- const unsigned int afi = v3_addr_get_afi(f);
- switch (afi) {
- case IANA_AFI_IPV4:
- BIO_printf(out, "%*sIPv4", indent, "");
- break;
- case IANA_AFI_IPV6:
- BIO_printf(out, "%*sIPv6", indent, "");
- break;
- default:
- BIO_printf(out, "%*sUnknown AFI %u", indent, "", afi);
- break;
- }
- if (f->addressFamily->length > 2) {
- switch (f->addressFamily->data[2]) {
- case 1:
- BIO_puts(out, " (Unicast)");
- break;
- case 2:
- BIO_puts(out, " (Multicast)");
- break;
- case 3:
- BIO_puts(out, " (Unicast/Multicast)");
- break;
- case 4:
- BIO_puts(out, " (MPLS)");
- break;
- case 64:
- BIO_puts(out, " (Tunnel)");
- break;
- case 65:
- BIO_puts(out, " (VPLS)");
- break;
- case 66:
- BIO_puts(out, " (BGP MDT)");
- break;
- case 128:
- BIO_puts(out, " (MPLS-labeled VPN)");
- break;
- default:
- BIO_printf(out, " (Unknown SAFI %u)",
- (unsigned) f->addressFamily->data[2]);
- break;
- }
- }
- switch (f->ipAddressChoice->type) {
- case IPAddressChoice_inherit:
- BIO_puts(out, ": inherit\n");
- break;
- case IPAddressChoice_addressesOrRanges:
- BIO_puts(out, ":\n");
- if (!i2r_IPAddressOrRanges(out,
- indent + 2,
- f->ipAddressChoice->u.addressesOrRanges,
- afi))
- return 0;
- break;
- }
- }
- return 1;
-}
-
-/*
- * Sort comparison function for a sequence of IPAddressOrRange
- * elements.
- */
-static int IPAddressOrRange_cmp(const IPAddressOrRange *a,
- const IPAddressOrRange *b,
- const int length)
-{
- unsigned char addr_a[ADDR_RAW_BUF_LEN], addr_b[ADDR_RAW_BUF_LEN];
- int prefixlen_a = 0, prefixlen_b = 0;
- int r;
-
- switch (a->type) {
- case IPAddressOrRange_addressPrefix:
- addr_expand(addr_a, a->u.addressPrefix, length, 0x00);
- prefixlen_a = addr_prefixlen(a->u.addressPrefix);
- break;
- case IPAddressOrRange_addressRange:
- addr_expand(addr_a, a->u.addressRange->min, length, 0x00);
- prefixlen_a = length * 8;
- break;
- }
-
- switch (b->type) {
- case IPAddressOrRange_addressPrefix:
- addr_expand(addr_b, b->u.addressPrefix, length, 0x00);
- prefixlen_b = addr_prefixlen(b->u.addressPrefix);
- break;
- case IPAddressOrRange_addressRange:
- addr_expand(addr_b, b->u.addressRange->min, length, 0x00);
- prefixlen_b = length * 8;
- break;
- }
-
- if ((r = memcmp(addr_a, addr_b, length)) != 0)
- return r;
- else
- return prefixlen_a - prefixlen_b;
-}
-
-/*
- * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort()
- * comparision routines are only allowed two arguments.
- */
-static int v4IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
- const IPAddressOrRange * const *b)
-{
- return IPAddressOrRange_cmp(*a, *b, 4);
-}
-
-/*
- * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort()
- * comparision routines are only allowed two arguments.
- */
-static int v6IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
- const IPAddressOrRange * const *b)
-{
- return IPAddressOrRange_cmp(*a, *b, 16);
-}
-
-/*
- * Calculate whether a range collapses to a prefix.
- * See last paragraph of RFC 3779 2.2.3.7.
- */
-static int range_should_be_prefix(const unsigned char *min,
- const unsigned char *max,
- const int length)
-{
- unsigned char mask;
- int i, j;
-
- for (i = 0; i < length && min[i] == max[i]; i++)
- ;
- for (j = length - 1; j >= 0 && min[j] == 0x00 && max[j] == 0xFF; j--)
- ;
- if (i < j)
- return -1;
- if (i > j)
- return i * 8;
- mask = min[i] ^ max[i];
- switch (mask) {
- case 0x01: j = 7; break;
- case 0x03: j = 6; break;
- case 0x07: j = 5; break;
- case 0x0F: j = 4; break;
- case 0x1F: j = 3; break;
- case 0x3F: j = 2; break;
- case 0x7F: j = 1; break;
- default: return -1;
- }
- if ((min[i] & mask) != 0 || (max[i] & mask) != mask)
- return -1;
- else
- return i * 8 + j;
-}
-
-/*
- * Construct a prefix.
- */
-static int make_addressPrefix(IPAddressOrRange **result,
- unsigned char *addr,
- const int prefixlen)
-{
- int bytelen = (prefixlen + 7) / 8, bitlen = prefixlen % 8;
- IPAddressOrRange *aor = IPAddressOrRange_new();
-
- if (aor == NULL)
- return 0;
- aor->type = IPAddressOrRange_addressPrefix;
- if (aor->u.addressPrefix == NULL &&
- (aor->u.addressPrefix = ASN1_BIT_STRING_new()) == NULL)
- goto err;
- if (!ASN1_BIT_STRING_set(aor->u.addressPrefix, addr, bytelen))
- goto err;
- aor->u.addressPrefix->flags &= ~7;
- aor->u.addressPrefix->flags |= ASN1_STRING_FLAG_BITS_LEFT;
- if (bitlen > 0) {
- aor->u.addressPrefix->data[bytelen - 1] &= ~(0xFF >> bitlen);
- aor->u.addressPrefix->flags |= 8 - bitlen;
- }
-
- *result = aor;
- return 1;
-
- err:
- IPAddressOrRange_free(aor);
- return 0;
-}
-
-/*
- * Construct a range. If it can be expressed as a prefix,
- * return a prefix instead. Doing this here simplifies
- * the rest of the code considerably.
- */
-static int make_addressRange(IPAddressOrRange **result,
- unsigned char *min,
- unsigned char *max,
- const int length)
-{
- IPAddressOrRange *aor;
- int i, prefixlen;
-
- if ((prefixlen = range_should_be_prefix(min, max, length)) >= 0)
- return make_addressPrefix(result, min, prefixlen);
-
- if ((aor = IPAddressOrRange_new()) == NULL)
- return 0;
- aor->type = IPAddressOrRange_addressRange;
- OPENSSL_assert(aor->u.addressRange == NULL);
- if ((aor->u.addressRange = IPAddressRange_new()) == NULL)
- goto err;
- if (aor->u.addressRange->min == NULL &&
- (aor->u.addressRange->min = ASN1_BIT_STRING_new()) == NULL)
- goto err;
- if (aor->u.addressRange->max == NULL &&
- (aor->u.addressRange->max = ASN1_BIT_STRING_new()) == NULL)
- goto err;
-
- for (i = length; i > 0 && min[i - 1] == 0x00; --i)
- ;
- if (!ASN1_BIT_STRING_set(aor->u.addressRange->min, min, i))
- goto err;
- aor->u.addressRange->min->flags &= ~7;
- aor->u.addressRange->min->flags |= ASN1_STRING_FLAG_BITS_LEFT;
- if (i > 0) {
- unsigned char b = min[i - 1];
- int j = 1;
- while ((b & (0xFFU >> j)) != 0)
- ++j;
- aor->u.addressRange->min->flags |= 8 - j;
- }
-
- for (i = length; i > 0 && max[i - 1] == 0xFF; --i)
- ;
- if (!ASN1_BIT_STRING_set(aor->u.addressRange->max, max, i))
- goto err;
- aor->u.addressRange->max->flags &= ~7;
- aor->u.addressRange->max->flags |= ASN1_STRING_FLAG_BITS_LEFT;
- if (i > 0) {
- unsigned char b = max[i - 1];
- int j = 1;
- while ((b & (0xFFU >> j)) != (0xFFU >> j))
- ++j;
- aor->u.addressRange->max->flags |= 8 - j;
- }
-
- *result = aor;
- return 1;
-
- err:
- IPAddressOrRange_free(aor);
- return 0;
-}
-
-/*
- * Construct a new address family or find an existing one.
- */
-static IPAddressFamily *make_IPAddressFamily(IPAddrBlocks *addr,
- const unsigned afi,
- const unsigned *safi)
-{
- IPAddressFamily *f;
- unsigned char key[3];
- unsigned keylen;
- int i;
-
- key[0] = (afi >> 8) & 0xFF;
- key[1] = afi & 0xFF;
- if (safi != NULL) {
- key[2] = *safi & 0xFF;
- keylen = 3;
- } else {
- keylen = 2;
- }
-
- for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
- f = sk_IPAddressFamily_value(addr, i);
- OPENSSL_assert(f->addressFamily->data != NULL);
- if (f->addressFamily->length == keylen &&
- !memcmp(f->addressFamily->data, key, keylen))
- return f;
- }
-
- if ((f = IPAddressFamily_new()) == NULL)
- goto err;
- if (f->ipAddressChoice == NULL &&
- (f->ipAddressChoice = IPAddressChoice_new()) == NULL)
- goto err;
- if (f->addressFamily == NULL &&
- (f->addressFamily = ASN1_OCTET_STRING_new()) == NULL)
- goto err;
- if (!ASN1_OCTET_STRING_set(f->addressFamily, key, keylen))
- goto err;
- if (!sk_IPAddressFamily_push(addr, f))
- goto err;
-
- return f;
-
- err:
- IPAddressFamily_free(f);
- return NULL;
-}
-
-/*
- * Add an inheritance element.
- */
-int v3_addr_add_inherit(IPAddrBlocks *addr,
- const unsigned afi,
- const unsigned *safi)
-{
- IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
- if (f == NULL ||
- f->ipAddressChoice == NULL ||
- (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
- f->ipAddressChoice->u.addressesOrRanges != NULL))
- return 0;
- if (f->ipAddressChoice->type == IPAddressChoice_inherit &&
- f->ipAddressChoice->u.inherit != NULL)
- return 1;
- if (f->ipAddressChoice->u.inherit == NULL &&
- (f->ipAddressChoice->u.inherit = ASN1_NULL_new()) == NULL)
- return 0;
- f->ipAddressChoice->type = IPAddressChoice_inherit;
- return 1;
-}
-
-/*
- * Construct an IPAddressOrRange sequence, or return an existing one.
- */
-static IPAddressOrRanges *make_prefix_or_range(IPAddrBlocks *addr,
- const unsigned afi,
- const unsigned *safi)
-{
- IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
- IPAddressOrRanges *aors = NULL;
-
- if (f == NULL ||
- f->ipAddressChoice == NULL ||
- (f->ipAddressChoice->type == IPAddressChoice_inherit &&
- f->ipAddressChoice->u.inherit != NULL))
- return NULL;
- if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges)
- aors = f->ipAddressChoice->u.addressesOrRanges;
- if (aors != NULL)
- return aors;
- if ((aors = sk_IPAddressOrRange_new_null()) == NULL)
- return NULL;
- switch (afi) {
- case IANA_AFI_IPV4:
- sk_IPAddressOrRange_set_cmp_func(aors, v4IPAddressOrRange_cmp);
- break;
- case IANA_AFI_IPV6:
- sk_IPAddressOrRange_set_cmp_func(aors, v6IPAddressOrRange_cmp);
- break;
- }
- f->ipAddressChoice->type = IPAddressChoice_addressesOrRanges;
- f->ipAddressChoice->u.addressesOrRanges = aors;
- return aors;
-}
-
-/*
- * Add a prefix.
- */
-int v3_addr_add_prefix(IPAddrBlocks *addr,
- const unsigned afi,
- const unsigned *safi,
- unsigned char *a,
- const int prefixlen)
-{
- IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
- IPAddressOrRange *aor;
- if (aors == NULL || !make_addressPrefix(&aor, a, prefixlen))
- return 0;
- if (sk_IPAddressOrRange_push(aors, aor))
- return 1;
- IPAddressOrRange_free(aor);
- return 0;
-}
-
-/*
- * Add a range.
- */
-int v3_addr_add_range(IPAddrBlocks *addr,
- const unsigned afi,
- const unsigned *safi,
- unsigned char *min,
- unsigned char *max)
-{
- IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
- IPAddressOrRange *aor;
- int length = length_from_afi(afi);
- if (aors == NULL)
- return 0;
- if (!make_addressRange(&aor, min, max, length))
- return 0;
- if (sk_IPAddressOrRange_push(aors, aor))
- return 1;
- IPAddressOrRange_free(aor);
- return 0;
-}
-
-/*
- * Extract min and max values from an IPAddressOrRange.
- */
-static void extract_min_max(IPAddressOrRange *aor,
- unsigned char *min,
- unsigned char *max,
- int length)
-{
- OPENSSL_assert(aor != NULL && min != NULL && max != NULL);
- switch (aor->type) {
- case IPAddressOrRange_addressPrefix:
- addr_expand(min, aor->u.addressPrefix, length, 0x00);
- addr_expand(max, aor->u.addressPrefix, length, 0xFF);
- return;
- case IPAddressOrRange_addressRange:
- addr_expand(min, aor->u.addressRange->min, length, 0x00);
- addr_expand(max, aor->u.addressRange->max, length, 0xFF);
- return;
- }
-}
-
-/*
- * Public wrapper for extract_min_max().
- */
-int v3_addr_get_range(IPAddressOrRange *aor,
- const unsigned afi,
- unsigned char *min,
- unsigned char *max,
- const int length)
-{
- int afi_length = length_from_afi(afi);
- if (aor == NULL || min == NULL || max == NULL ||
- afi_length == 0 || length < afi_length ||
- (aor->type != IPAddressOrRange_addressPrefix &&
- aor->type != IPAddressOrRange_addressRange))
- return 0;
- extract_min_max(aor, min, max, afi_length);
- return afi_length;
-}
-
-/*
- * Sort comparision function for a sequence of IPAddressFamily.
- *
- * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about
- * the ordering: I can read it as meaning that IPv6 without a SAFI
- * comes before IPv4 with a SAFI, which seems pretty weird. The
- * examples in appendix B suggest that the author intended the
- * null-SAFI rule to apply only within a single AFI, which is what I
- * would have expected and is what the following code implements.
- */
-static int IPAddressFamily_cmp(const IPAddressFamily * const *a_,
- const IPAddressFamily * const *b_)
-{
- const ASN1_OCTET_STRING *a = (*a_)->addressFamily;
- const ASN1_OCTET_STRING *b = (*b_)->addressFamily;
- int len = ((a->length <= b->length) ? a->length : b->length);
- int cmp = memcmp(a->data, b->data, len);
- return cmp ? cmp : a->length - b->length;
-}
-
-/*
- * Check whether an IPAddrBLocks is in canonical form.
- */
-int v3_addr_is_canonical(IPAddrBlocks *addr)
-{
- unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
- unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
- IPAddressOrRanges *aors;
- int i, j, k;
-
- /*
- * Empty extension is cannonical.
- */
- if (addr == NULL)
- return 1;
-
- /*
- * Check whether the top-level list is in order.
- */
- for (i = 0; i < sk_IPAddressFamily_num(addr) - 1; i++) {
- const IPAddressFamily *a = sk_IPAddressFamily_value(addr, i);
- const IPAddressFamily *b = sk_IPAddressFamily_value(addr, i + 1);
- if (IPAddressFamily_cmp(&a, &b) >= 0)
- return 0;
- }
-
- /*
- * Top level's ok, now check each address family.
- */
- for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
- IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
- int length = length_from_afi(v3_addr_get_afi(f));
-
- /*
- * Inheritance is canonical. Anything other than inheritance or
- * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something.
- */
- if (f == NULL || f->ipAddressChoice == NULL)
- return 0;
- switch (f->ipAddressChoice->type) {
- case IPAddressChoice_inherit:
- continue;
- case IPAddressChoice_addressesOrRanges:
- break;
- default:
- return 0;
- }
-
- /*
- * It's an IPAddressOrRanges sequence, check it.
- */
- aors = f->ipAddressChoice->u.addressesOrRanges;
- if (sk_IPAddressOrRange_num(aors) == 0)
- return 0;
- for (j = 0; j < sk_IPAddressOrRange_num(aors) - 1; j++) {
- IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
- IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, j + 1);
-
- extract_min_max(a, a_min, a_max, length);
- extract_min_max(b, b_min, b_max, length);
-
- /*
- * Punt misordered list, overlapping start, or inverted range.
- */
- if (memcmp(a_min, b_min, length) >= 0 ||
- memcmp(a_min, a_max, length) > 0 ||
- memcmp(b_min, b_max, length) > 0)
- return 0;
-
- /*
- * Punt if adjacent or overlapping. Check for adjacency by
- * subtracting one from b_min first.
- */
- for (k = length - 1; k >= 0 && b_min[k]-- == 0x00; k--)
- ;
- if (memcmp(a_max, b_min, length) >= 0)
- return 0;
-
- /*
- * Check for range that should be expressed as a prefix.
- */
- if (a->type == IPAddressOrRange_addressRange &&
- range_should_be_prefix(a_min, a_max, length) >= 0)
- return 0;
- }
-
- /*
- * Check final range to see if it should be a prefix.
- */
- j = sk_IPAddressOrRange_num(aors) - 1;
- {
- IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
- if (a->type == IPAddressOrRange_addressRange) {
- extract_min_max(a, a_min, a_max, length);
- if (range_should_be_prefix(a_min, a_max, length) >= 0)
- return 0;
- }
- }
- }
-
- /*
- * If we made it through all that, we're happy.
- */
- return 1;
-}
-
-/*
- * Whack an IPAddressOrRanges into canonical form.
- */
-static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors,
- const unsigned afi)
-{
- int i, j, length = length_from_afi(afi);
-
- /*
- * Sort the IPAddressOrRanges sequence.
- */
- sk_IPAddressOrRange_sort(aors);
-
- /*
- * Clean up representation issues, punt on duplicates or overlaps.
- */
- for (i = 0; i < sk_IPAddressOrRange_num(aors) - 1; i++) {
- IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, i);
- IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, i + 1);
- unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
- unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
-
- extract_min_max(a, a_min, a_max, length);
- extract_min_max(b, b_min, b_max, length);
-
- /*
- * Punt overlaps.
- */
- if (memcmp(a_max, b_min, length) >= 0)
- return 0;
-
- /*
- * Merge if a and b are adjacent. We check for
- * adjacency by subtracting one from b_min first.
- */
- for (j = length - 1; j >= 0 && b_min[j]-- == 0x00; j--)
- ;
- if (memcmp(a_max, b_min, length) == 0) {
- IPAddressOrRange *merged;
- if (!make_addressRange(&merged, a_min, b_max, length))
- return 0;
- sk_IPAddressOrRange_set(aors, i, merged);
- sk_IPAddressOrRange_delete(aors, i + 1);
- IPAddressOrRange_free(a);
- IPAddressOrRange_free(b);
- --i;
- continue;
- }
- }
-
- return 1;
-}
-
-/*
- * Whack an IPAddrBlocks extension into canonical form.
- */
-int v3_addr_canonize(IPAddrBlocks *addr)
-{
- int i;
- for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
- IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
- if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
- !IPAddressOrRanges_canonize(f->ipAddressChoice->u.addressesOrRanges,
- v3_addr_get_afi(f)))
- return 0;
- }
- sk_IPAddressFamily_set_cmp_func(addr, IPAddressFamily_cmp);
- sk_IPAddressFamily_sort(addr);
- OPENSSL_assert(v3_addr_is_canonical(addr));
- return 1;
-}
-
-/*
- * v2i handler for the IPAddrBlocks extension.
- */
-static void *v2i_IPAddrBlocks(const struct v3_ext_method *method,
- struct v3_ext_ctx *ctx,
- STACK_OF(CONF_VALUE) *values)
-{
- static const char v4addr_chars[] = "0123456789.";
- static const char v6addr_chars[] = "0123456789.:abcdefABCDEF";
- IPAddrBlocks *addr = NULL;
- char *s = NULL, *t;
- int i;
-
- if ((addr = sk_IPAddressFamily_new(IPAddressFamily_cmp)) == NULL) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
- CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
- unsigned char min[ADDR_RAW_BUF_LEN], max[ADDR_RAW_BUF_LEN];
- unsigned afi, *safi = NULL, safi_;
- const char *addr_chars;
- int prefixlen, i1, i2, delim, length;
-
- if ( !name_cmp(val->name, "IPv4")) {
- afi = IANA_AFI_IPV4;
- } else if (!name_cmp(val->name, "IPv6")) {
- afi = IANA_AFI_IPV6;
- } else if (!name_cmp(val->name, "IPv4-SAFI")) {
- afi = IANA_AFI_IPV4;
- safi = &safi_;
- } else if (!name_cmp(val->name, "IPv6-SAFI")) {
- afi = IANA_AFI_IPV6;
- safi = &safi_;
- } else {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_NAME_ERROR);
- X509V3_conf_err(val);
- goto err;
- }
-
- switch (afi) {
- case IANA_AFI_IPV4:
- addr_chars = v4addr_chars;
- break;
- case IANA_AFI_IPV6:
- addr_chars = v6addr_chars;
- break;
- }
-
- length = length_from_afi(afi);
-
- /*
- * Handle SAFI, if any, and BUF_strdup() so we can null-terminate
- * the other input values.
- */
- if (safi != NULL) {
- *safi = strtoul(val->value, &t, 0);
- t += strspn(t, " \t");
- if (*safi > 0xFF || *t++ != ':') {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_SAFI);
- X509V3_conf_err(val);
- goto err;
- }
- t += strspn(t, " \t");
- s = BUF_strdup(t);
- } else {
- s = BUF_strdup(val->value);
- }
- if (s == NULL) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /*
- * Check for inheritance. Not worth additional complexity to
- * optimize this (seldom-used) case.
- */
- if (!strcmp(s, "inherit")) {
- if (!v3_addr_add_inherit(addr, afi, safi)) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_INHERITANCE);
- X509V3_conf_err(val);
- goto err;
- }
- OPENSSL_free(s);
- s = NULL;
- continue;
- }
-
- i1 = strspn(s, addr_chars);
- i2 = i1 + strspn(s + i1, " \t");
- delim = s[i2++];
- s[i1] = '\0';
-
- if (a2i_ipadd(min, s) != length) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
- X509V3_conf_err(val);
- goto err;
- }
-
- switch (delim) {
- case '/':
- prefixlen = (int) strtoul(s + i2, &t, 10);
- if (t == s + i2 || *t != '\0') {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
- X509V3_conf_err(val);
- goto err;
- }
- if (!v3_addr_add_prefix(addr, afi, safi, min, prefixlen)) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- break;
- case '-':
- i1 = i2 + strspn(s + i2, " \t");
- i2 = i1 + strspn(s + i1, addr_chars);
- if (i1 == i2 || s[i2] != '\0') {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
- X509V3_conf_err(val);
- goto err;
- }
- if (a2i_ipadd(max, s + i1) != length) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
- X509V3_conf_err(val);
- goto err;
- }
- if (!v3_addr_add_range(addr, afi, safi, min, max)) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- break;
- case '\0':
- if (!v3_addr_add_prefix(addr, afi, safi, min, length * 8)) {
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- break;
- default:
- X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
- X509V3_conf_err(val);
- goto err;
- }
-
- OPENSSL_free(s);
- s = NULL;
- }
-
- /*
- * Canonize the result, then we're done.
- */
- if (!v3_addr_canonize(addr))
- goto err;
- return addr;
-
- err:
- OPENSSL_free(s);
- sk_IPAddressFamily_pop_free(addr, IPAddressFamily_free);
- return NULL;
-}
-
-/*
- * OpenSSL dispatch
- */
-const X509V3_EXT_METHOD v3_addr = {
- NID_sbgp_ipAddrBlock, /* nid */
- 0, /* flags */
- ASN1_ITEM_ref(IPAddrBlocks), /* template */
- 0, 0, 0, 0, /* old functions, ignored */
- 0, /* i2s */
- 0, /* s2i */
- 0, /* i2v */
- v2i_IPAddrBlocks, /* v2i */
- i2r_IPAddrBlocks, /* i2r */
- 0, /* r2i */
- NULL /* extension-specific data */
-};
-
-/*
- * Figure out whether extension sues inheritance.
- */
-int v3_addr_inherits(IPAddrBlocks *addr)
-{
- int i;
- if (addr == NULL)
- return 0;
- for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
- IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
- if (f->ipAddressChoice->type == IPAddressChoice_inherit)
- return 1;
- }
- return 0;
-}
-
-/*
- * Figure out whether parent contains child.
- */
-static int addr_contains(IPAddressOrRanges *parent,
- IPAddressOrRanges *child,
- int length)
-{
- unsigned char p_min[ADDR_RAW_BUF_LEN], p_max[ADDR_RAW_BUF_LEN];
- unsigned char c_min[ADDR_RAW_BUF_LEN], c_max[ADDR_RAW_BUF_LEN];
- int p, c;
-
- if (child == NULL || parent == child)
- return 1;
- if (parent == NULL)
- return 0;
-
- p = 0;
- for (c = 0; c < sk_IPAddressOrRange_num(child); c++) {
- extract_min_max(sk_IPAddressOrRange_value(child, c),
- c_min, c_max, length);
- for (;; p++) {
- if (p >= sk_IPAddressOrRange_num(parent))
- return 0;
- extract_min_max(sk_IPAddressOrRange_value(parent, p),
- p_min, p_max, length);
- if (memcmp(p_max, c_max, length) < 0)
- continue;
- if (memcmp(p_min, c_min, length) > 0)
- return 0;
- break;
- }
- }
-
- return 1;
-}
-
-/*
- * Test whether a is a subset of b.
- */
-int v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b)
-{
- int i;
- if (a == NULL || a == b)
- return 1;
- if (b == NULL || v3_addr_inherits(a) || v3_addr_inherits(b))
- return 0;
- sk_IPAddressFamily_set_cmp_func(b, IPAddressFamily_cmp);
- for (i = 0; i < sk_IPAddressFamily_num(a); i++) {
- IPAddressFamily *fa = sk_IPAddressFamily_value(a, i);
- int j = sk_IPAddressFamily_find(b, fa);
- IPAddressFamily *fb;
- fb = sk_IPAddressFamily_value(b, j);
- if (fb == NULL)
- return 0;
- if (!addr_contains(fb->ipAddressChoice->u.addressesOrRanges,
- fa->ipAddressChoice->u.addressesOrRanges,
- length_from_afi(v3_addr_get_afi(fb))))
- return 0;
- }
- return 1;
-}
-
-/*
- * Validation error handling via callback.
- */
-#define validation_err(_err_) \
- do { \
- if (ctx != NULL) { \
- ctx->error = _err_; \
- ctx->error_depth = i; \
- ctx->current_cert = x; \
- ret = ctx->verify_cb(0, ctx); \
- } else { \
- ret = 0; \
- } \
- if (!ret) \
- goto done; \
- } while (0)
-
-/*
- * Core code for RFC 3779 2.3 path validation.
- */
-static int v3_addr_validate_path_internal(X509_STORE_CTX *ctx,
- STACK_OF(X509) *chain,
- IPAddrBlocks *ext)
-{
- IPAddrBlocks *child = NULL;
- int i, j, ret = 1;
- X509 *x;
-
- OPENSSL_assert(chain != NULL && sk_X509_num(chain) > 0);
- OPENSSL_assert(ctx != NULL || ext != NULL);
- OPENSSL_assert(ctx == NULL || ctx->verify_cb != NULL);
-
- /*
- * Figure out where to start. If we don't have an extension to
- * check, we're done. Otherwise, check canonical form and
- * set up for walking up the chain.
- */
- if (ext != NULL) {
- i = -1;
- x = NULL;
- } else {
- i = 0;
- x = sk_X509_value(chain, i);
- OPENSSL_assert(x != NULL);
- if ((ext = x->rfc3779_addr) == NULL)
- goto done;
- }
- if (!v3_addr_is_canonical(ext))
- validation_err(X509_V_ERR_INVALID_EXTENSION);
- sk_IPAddressFamily_set_cmp_func(ext, IPAddressFamily_cmp);
- if ((child = sk_IPAddressFamily_dup(ext)) == NULL) {
- X509V3err(X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL, ERR_R_MALLOC_FAILURE);
- ret = 0;
- goto done;
- }
-
- /*
- * Now walk up the chain. No cert may list resources that its
- * parent doesn't list.
- */
- for (i++; i < sk_X509_num(chain); i++) {
- x = sk_X509_value(chain, i);
- OPENSSL_assert(x != NULL);
- if (!v3_addr_is_canonical(x->rfc3779_addr))
- validation_err(X509_V_ERR_INVALID_EXTENSION);
- if (x->rfc3779_addr == NULL) {
- for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
- IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
- if (fc->ipAddressChoice->type != IPAddressChoice_inherit) {
- validation_err(X509_V_ERR_UNNESTED_RESOURCE);
- break;
- }
- }
- continue;
- }
- sk_IPAddressFamily_set_cmp_func(x->rfc3779_addr, IPAddressFamily_cmp);
- for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
- IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
- int k = sk_IPAddressFamily_find(x->rfc3779_addr, fc);
- IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, k);
- if (fp == NULL) {
- if (fc->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
- validation_err(X509_V_ERR_UNNESTED_RESOURCE);
- break;
- }
- continue;
- }
- if (fp->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
- if (fc->ipAddressChoice->type == IPAddressChoice_inherit ||
- addr_contains(fp->ipAddressChoice->u.addressesOrRanges,
- fc->ipAddressChoice->u.addressesOrRanges,
- length_from_afi(v3_addr_get_afi(fc))))
- sk_IPAddressFamily_set(child, j, fp);
- else
- validation_err(X509_V_ERR_UNNESTED_RESOURCE);
- }
- }
- }
-
- /*
- * Trust anchor can't inherit.
- */
- OPENSSL_assert(x != NULL);
- if (x->rfc3779_addr != NULL) {
- for (j = 0; j < sk_IPAddressFamily_num(x->rfc3779_addr); j++) {
- IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, j);
- if (fp->ipAddressChoice->type == IPAddressChoice_inherit &&
- sk_IPAddressFamily_find(child, fp) >= 0)
- validation_err(X509_V_ERR_UNNESTED_RESOURCE);
- }
- }
-
- done:
- sk_IPAddressFamily_free(child);
- return ret;
-}
-
-#undef validation_err
-
-/*
- * RFC 3779 2.3 path validation -- called from X509_verify_cert().
- */
-int v3_addr_validate_path(X509_STORE_CTX *ctx)
-{
- return v3_addr_validate_path_internal(ctx, ctx->chain, NULL);
-}
-
-/*
- * RFC 3779 2.3 path validation of an extension.
- * Test whether chain covers extension.
- */
-int v3_addr_validate_resource_set(STACK_OF(X509) *chain,
- IPAddrBlocks *ext,
- int allow_inheritance)
-{
- if (ext == NULL)
- return 1;
- if (chain == NULL || sk_X509_num(chain) == 0)
- return 0;
- if (!allow_inheritance && v3_addr_inherits(ext))
- return 0;
- return v3_addr_validate_path_internal(NULL, chain, ext);
-}
-
-#endif /* OPENSSL_NO_RFC3779 */
+/*
+ * Contributed to the OpenSSL Project by the American Registry for
+ * Internet Numbers ("ARIN").
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ */
+
+/*
+ * Implementation of RFC 3779 section 2.2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/buffer.h>
+#include <openssl/x509v3.h>
+
+#ifndef OPENSSL_NO_RFC3779
+
+/*
+ * OpenSSL ASN.1 template translation of RFC 3779 2.2.3.
+ */
+
+ASN1_SEQUENCE(IPAddressRange) = {
+ ASN1_SIMPLE(IPAddressRange, min, ASN1_BIT_STRING),
+ ASN1_SIMPLE(IPAddressRange, max, ASN1_BIT_STRING)
+} ASN1_SEQUENCE_END(IPAddressRange)
+
+ASN1_CHOICE(IPAddressOrRange) = {
+ ASN1_SIMPLE(IPAddressOrRange, u.addressPrefix, ASN1_BIT_STRING),
+ ASN1_SIMPLE(IPAddressOrRange, u.addressRange, IPAddressRange)
+} ASN1_CHOICE_END(IPAddressOrRange)
+
+ASN1_CHOICE(IPAddressChoice) = {
+ ASN1_SIMPLE(IPAddressChoice, u.inherit, ASN1_NULL),
+ ASN1_SEQUENCE_OF(IPAddressChoice, u.addressesOrRanges, IPAddressOrRange)
+} ASN1_CHOICE_END(IPAddressChoice)
+
+ASN1_SEQUENCE(IPAddressFamily) = {
+ ASN1_SIMPLE(IPAddressFamily, addressFamily, ASN1_OCTET_STRING),
+ ASN1_SIMPLE(IPAddressFamily, ipAddressChoice, IPAddressChoice)
+} ASN1_SEQUENCE_END(IPAddressFamily)
+
+ASN1_ITEM_TEMPLATE(IPAddrBlocks) =
+ ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0,
+ IPAddrBlocks, IPAddressFamily)
+ASN1_ITEM_TEMPLATE_END(IPAddrBlocks)
+
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice)
+IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily)
+
+/*
+ * How much buffer space do we need for a raw address?
+ */
+#define ADDR_RAW_BUF_LEN 16
+
+/*
+ * What's the address length associated with this AFI?
+ */
+static int length_from_afi(const unsigned afi)
+{
+ switch (afi) {
+ case IANA_AFI_IPV4:
+ return 4;
+ case IANA_AFI_IPV6:
+ return 16;
+ default:
+ return 0;
+ }
+}
+
+/*
+ * Extract the AFI from an IPAddressFamily.
+ */
+unsigned int v3_addr_get_afi(const IPAddressFamily *f)
+{
+ return ((f != NULL &&
+ f->addressFamily != NULL &&
+ f->addressFamily->data != NULL)
+ ? ((f->addressFamily->data[0] << 8) |
+ (f->addressFamily->data[1]))
+ : 0);
+}
+
+/*
+ * Expand the bitstring form of an address into a raw byte array.
+ * At the moment this is coded for simplicity, not speed.
+ */
+static void addr_expand(unsigned char *addr,
+ const ASN1_BIT_STRING *bs,
+ const int length,
+ const unsigned char fill)
+{
+ OPENSSL_assert(bs->length >= 0 && bs->length <= length);
+ if (bs->length > 0) {
+ memcpy(addr, bs->data, bs->length);
+ if ((bs->flags & 7) != 0) {
+ unsigned char mask = 0xFF >> (8 - (bs->flags & 7));
+ if (fill == 0)
+ addr[bs->length - 1] &= ~mask;
+ else
+ addr[bs->length - 1] |= mask;
+ }
+ }
+ memset(addr + bs->length, fill, length - bs->length);
+}
+
+/*
+ * Extract the prefix length from a bitstring.
+ */
+#define addr_prefixlen(bs) ((int) ((bs)->length * 8 - ((bs)->flags & 7)))
+
+/*
+ * i2r handler for one address bitstring.
+ */
+static int i2r_address(BIO *out,
+ const unsigned afi,
+ const unsigned char fill,
+ const ASN1_BIT_STRING *bs)
+{
+ unsigned char addr[ADDR_RAW_BUF_LEN];
+ int i, n;
+
+ if (bs->length < 0)
+ return 0;
+ switch (afi) {
+ case IANA_AFI_IPV4:
+ if (bs->length > 4)
+ return 0;
+ addr_expand(addr, bs, 4, fill);
+ BIO_printf(out, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
+ break;
+ case IANA_AFI_IPV6:
+ if (bs->length > 16)
+ return 0;
+ addr_expand(addr, bs, 16, fill);
+ for (n = 16; n > 1 && addr[n-1] == 0x00 && addr[n-2] == 0x00; n -= 2)
+ ;
+ for (i = 0; i < n; i += 2)
+ BIO_printf(out, "%x%s", (addr[i] << 8) | addr[i+1], (i < 14 ? ":" : ""));
+ if (i < 16)
+ BIO_puts(out, ":");
+ if (i == 0)
+ BIO_puts(out, ":");
+ break;
+ default:
+ for (i = 0; i < bs->length; i++)
+ BIO_printf(out, "%s%02x", (i > 0 ? ":" : ""), bs->data[i]);
+ BIO_printf(out, "[%d]", (int) (bs->flags & 7));
+ break;
+ }
+ return 1;
+}
+
+/*
+ * i2r handler for a sequence of addresses and ranges.
+ */
+static int i2r_IPAddressOrRanges(BIO *out,
+ const int indent,
+ const IPAddressOrRanges *aors,
+ const unsigned afi)
+{
+ int i;
+ for (i = 0; i < sk_IPAddressOrRange_num(aors); i++) {
+ const IPAddressOrRange *aor = sk_IPAddressOrRange_value(aors, i);
+ BIO_printf(out, "%*s", indent, "");
+ switch (aor->type) {
+ case IPAddressOrRange_addressPrefix:
+ if (!i2r_address(out, afi, 0x00, aor->u.addressPrefix))
+ return 0;
+ BIO_printf(out, "/%d\n", addr_prefixlen(aor->u.addressPrefix));
+ continue;
+ case IPAddressOrRange_addressRange:
+ if (!i2r_address(out, afi, 0x00, aor->u.addressRange->min))
+ return 0;
+ BIO_puts(out, "-");
+ if (!i2r_address(out, afi, 0xFF, aor->u.addressRange->max))
+ return 0;
+ BIO_puts(out, "\n");
+ continue;
+ }
+ }
+ return 1;
+}
+
+/*
+ * i2r handler for an IPAddrBlocks extension.
+ */
+static int i2r_IPAddrBlocks(const X509V3_EXT_METHOD *method,
+ void *ext,
+ BIO *out,
+ int indent)
+{
+ const IPAddrBlocks *addr = ext;
+ int i;
+ for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+ IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+ const unsigned int afi = v3_addr_get_afi(f);
+ switch (afi) {
+ case IANA_AFI_IPV4:
+ BIO_printf(out, "%*sIPv4", indent, "");
+ break;
+ case IANA_AFI_IPV6:
+ BIO_printf(out, "%*sIPv6", indent, "");
+ break;
+ default:
+ BIO_printf(out, "%*sUnknown AFI %u", indent, "", afi);
+ break;
+ }
+ if (f->addressFamily->length > 2) {
+ switch (f->addressFamily->data[2]) {
+ case 1:
+ BIO_puts(out, " (Unicast)");
+ break;
+ case 2:
+ BIO_puts(out, " (Multicast)");
+ break;
+ case 3:
+ BIO_puts(out, " (Unicast/Multicast)");
+ break;
+ case 4:
+ BIO_puts(out, " (MPLS)");
+ break;
+ case 64:
+ BIO_puts(out, " (Tunnel)");
+ break;
+ case 65:
+ BIO_puts(out, " (VPLS)");
+ break;
+ case 66:
+ BIO_puts(out, " (BGP MDT)");
+ break;
+ case 128:
+ BIO_puts(out, " (MPLS-labeled VPN)");
+ break;
+ default:
+ BIO_printf(out, " (Unknown SAFI %u)",
+ (unsigned) f->addressFamily->data[2]);
+ break;
+ }
+ }
+ switch (f->ipAddressChoice->type) {
+ case IPAddressChoice_inherit:
+ BIO_puts(out, ": inherit\n");
+ break;
+ case IPAddressChoice_addressesOrRanges:
+ BIO_puts(out, ":\n");
+ if (!i2r_IPAddressOrRanges(out,
+ indent + 2,
+ f->ipAddressChoice->u.addressesOrRanges,
+ afi))
+ return 0;
+ break;
+ }
+ }
+ return 1;
+}
+
+/*
+ * Sort comparison function for a sequence of IPAddressOrRange
+ * elements.
+ */
+static int IPAddressOrRange_cmp(const IPAddressOrRange *a,
+ const IPAddressOrRange *b,
+ const int length)
+{
+ unsigned char addr_a[ADDR_RAW_BUF_LEN], addr_b[ADDR_RAW_BUF_LEN];
+ int prefixlen_a = 0, prefixlen_b = 0;
+ int r;
+
+ switch (a->type) {
+ case IPAddressOrRange_addressPrefix:
+ addr_expand(addr_a, a->u.addressPrefix, length, 0x00);
+ prefixlen_a = addr_prefixlen(a->u.addressPrefix);
+ break;
+ case IPAddressOrRange_addressRange:
+ addr_expand(addr_a, a->u.addressRange->min, length, 0x00);
+ prefixlen_a = length * 8;
+ break;
+ }
+
+ switch (b->type) {
+ case IPAddressOrRange_addressPrefix:
+ addr_expand(addr_b, b->u.addressPrefix, length, 0x00);
+ prefixlen_b = addr_prefixlen(b->u.addressPrefix);
+ break;
+ case IPAddressOrRange_addressRange:
+ addr_expand(addr_b, b->u.addressRange->min, length, 0x00);
+ prefixlen_b = length * 8;
+ break;
+ }
+
+ if ((r = memcmp(addr_a, addr_b, length)) != 0)
+ return r;
+ else
+ return prefixlen_a - prefixlen_b;
+}
+
+/*
+ * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort()
+ * comparision routines are only allowed two arguments.
+ */
+static int v4IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
+ const IPAddressOrRange * const *b)
+{
+ return IPAddressOrRange_cmp(*a, *b, 4);
+}
+
+/*
+ * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort()
+ * comparision routines are only allowed two arguments.
+ */
+static int v6IPAddressOrRange_cmp(const IPAddressOrRange * const *a,
+ const IPAddressOrRange * const *b)
+{
+ return IPAddressOrRange_cmp(*a, *b, 16);
+}
+
+/*
+ * Calculate whether a range collapses to a prefix.
+ * See last paragraph of RFC 3779 2.2.3.7.
+ */
+static int range_should_be_prefix(const unsigned char *min,
+ const unsigned char *max,
+ const int length)
+{
+ unsigned char mask;
+ int i, j;
+
+ for (i = 0; i < length && min[i] == max[i]; i++)
+ ;
+ for (j = length - 1; j >= 0 && min[j] == 0x00 && max[j] == 0xFF; j--)
+ ;
+ if (i < j)
+ return -1;
+ if (i > j)
+ return i * 8;
+ mask = min[i] ^ max[i];
+ switch (mask) {
+ case 0x01: j = 7; break;
+ case 0x03: j = 6; break;
+ case 0x07: j = 5; break;
+ case 0x0F: j = 4; break;
+ case 0x1F: j = 3; break;
+ case 0x3F: j = 2; break;
+ case 0x7F: j = 1; break;
+ default: return -1;
+ }
+ if ((min[i] & mask) != 0 || (max[i] & mask) != mask)
+ return -1;
+ else
+ return i * 8 + j;
+}
+
+/*
+ * Construct a prefix.
+ */
+static int make_addressPrefix(IPAddressOrRange **result,
+ unsigned char *addr,
+ const int prefixlen)
+{
+ int bytelen = (prefixlen + 7) / 8, bitlen = prefixlen % 8;
+ IPAddressOrRange *aor = IPAddressOrRange_new();
+
+ if (aor == NULL)
+ return 0;
+ aor->type = IPAddressOrRange_addressPrefix;
+ if (aor->u.addressPrefix == NULL &&
+ (aor->u.addressPrefix = ASN1_BIT_STRING_new()) == NULL)
+ goto err;
+ if (!ASN1_BIT_STRING_set(aor->u.addressPrefix, addr, bytelen))
+ goto err;
+ aor->u.addressPrefix->flags &= ~7;
+ aor->u.addressPrefix->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+ if (bitlen > 0) {
+ aor->u.addressPrefix->data[bytelen - 1] &= ~(0xFF >> bitlen);
+ aor->u.addressPrefix->flags |= 8 - bitlen;
+ }
+
+ *result = aor;
+ return 1;
+
+ err:
+ IPAddressOrRange_free(aor);
+ return 0;
+}
+
+/*
+ * Construct a range. If it can be expressed as a prefix,
+ * return a prefix instead. Doing this here simplifies
+ * the rest of the code considerably.
+ */
+static int make_addressRange(IPAddressOrRange **result,
+ unsigned char *min,
+ unsigned char *max,
+ const int length)
+{
+ IPAddressOrRange *aor;
+ int i, prefixlen;
+
+ if ((prefixlen = range_should_be_prefix(min, max, length)) >= 0)
+ return make_addressPrefix(result, min, prefixlen);
+
+ if ((aor = IPAddressOrRange_new()) == NULL)
+ return 0;
+ aor->type = IPAddressOrRange_addressRange;
+ OPENSSL_assert(aor->u.addressRange == NULL);
+ if ((aor->u.addressRange = IPAddressRange_new()) == NULL)
+ goto err;
+ if (aor->u.addressRange->min == NULL &&
+ (aor->u.addressRange->min = ASN1_BIT_STRING_new()) == NULL)
+ goto err;
+ if (aor->u.addressRange->max == NULL &&
+ (aor->u.addressRange->max = ASN1_BIT_STRING_new()) == NULL)
+ goto err;
+
+ for (i = length; i > 0 && min[i - 1] == 0x00; --i)
+ ;
+ if (!ASN1_BIT_STRING_set(aor->u.addressRange->min, min, i))
+ goto err;
+ aor->u.addressRange->min->flags &= ~7;
+ aor->u.addressRange->min->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+ if (i > 0) {
+ unsigned char b = min[i - 1];
+ int j = 1;
+ while ((b & (0xFFU >> j)) != 0)
+ ++j;
+ aor->u.addressRange->min->flags |= 8 - j;
+ }
+
+ for (i = length; i > 0 && max[i - 1] == 0xFF; --i)
+ ;
+ if (!ASN1_BIT_STRING_set(aor->u.addressRange->max, max, i))
+ goto err;
+ aor->u.addressRange->max->flags &= ~7;
+ aor->u.addressRange->max->flags |= ASN1_STRING_FLAG_BITS_LEFT;
+ if (i > 0) {
+ unsigned char b = max[i - 1];
+ int j = 1;
+ while ((b & (0xFFU >> j)) != (0xFFU >> j))
+ ++j;
+ aor->u.addressRange->max->flags |= 8 - j;
+ }
+
+ *result = aor;
+ return 1;
+
+ err:
+ IPAddressOrRange_free(aor);
+ return 0;
+}
+
+/*
+ * Construct a new address family or find an existing one.
+ */
+static IPAddressFamily *make_IPAddressFamily(IPAddrBlocks *addr,
+ const unsigned afi,
+ const unsigned *safi)
+{
+ IPAddressFamily *f;
+ unsigned char key[3];
+ unsigned keylen;
+ int i;
+
+ key[0] = (afi >> 8) & 0xFF;
+ key[1] = afi & 0xFF;
+ if (safi != NULL) {
+ key[2] = *safi & 0xFF;
+ keylen = 3;
+ } else {
+ keylen = 2;
+ }
+
+ for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+ f = sk_IPAddressFamily_value(addr, i);
+ OPENSSL_assert(f->addressFamily->data != NULL);
+ if (f->addressFamily->length == keylen &&
+ !memcmp(f->addressFamily->data, key, keylen))
+ return f;
+ }
+
+ if ((f = IPAddressFamily_new()) == NULL)
+ goto err;
+ if (f->ipAddressChoice == NULL &&
+ (f->ipAddressChoice = IPAddressChoice_new()) == NULL)
+ goto err;
+ if (f->addressFamily == NULL &&
+ (f->addressFamily = ASN1_OCTET_STRING_new()) == NULL)
+ goto err;
+ if (!ASN1_OCTET_STRING_set(f->addressFamily, key, keylen))
+ goto err;
+ if (!sk_IPAddressFamily_push(addr, f))
+ goto err;
+
+ return f;
+
+ err:
+ IPAddressFamily_free(f);
+ return NULL;
+}
+
+/*
+ * Add an inheritance element.
+ */
+int v3_addr_add_inherit(IPAddrBlocks *addr,
+ const unsigned afi,
+ const unsigned *safi)
+{
+ IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
+ if (f == NULL ||
+ f->ipAddressChoice == NULL ||
+ (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
+ f->ipAddressChoice->u.addressesOrRanges != NULL))
+ return 0;
+ if (f->ipAddressChoice->type == IPAddressChoice_inherit &&
+ f->ipAddressChoice->u.inherit != NULL)
+ return 1;
+ if (f->ipAddressChoice->u.inherit == NULL &&
+ (f->ipAddressChoice->u.inherit = ASN1_NULL_new()) == NULL)
+ return 0;
+ f->ipAddressChoice->type = IPAddressChoice_inherit;
+ return 1;
+}
+
+/*
+ * Construct an IPAddressOrRange sequence, or return an existing one.
+ */
+static IPAddressOrRanges *make_prefix_or_range(IPAddrBlocks *addr,
+ const unsigned afi,
+ const unsigned *safi)
+{
+ IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi);
+ IPAddressOrRanges *aors = NULL;
+
+ if (f == NULL ||
+ f->ipAddressChoice == NULL ||
+ (f->ipAddressChoice->type == IPAddressChoice_inherit &&
+ f->ipAddressChoice->u.inherit != NULL))
+ return NULL;
+ if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges)
+ aors = f->ipAddressChoice->u.addressesOrRanges;
+ if (aors != NULL)
+ return aors;
+ if ((aors = sk_IPAddressOrRange_new_null()) == NULL)
+ return NULL;
+ switch (afi) {
+ case IANA_AFI_IPV4:
+ sk_IPAddressOrRange_set_cmp_func(aors, v4IPAddressOrRange_cmp);
+ break;
+ case IANA_AFI_IPV6:
+ sk_IPAddressOrRange_set_cmp_func(aors, v6IPAddressOrRange_cmp);
+ break;
+ }
+ f->ipAddressChoice->type = IPAddressChoice_addressesOrRanges;
+ f->ipAddressChoice->u.addressesOrRanges = aors;
+ return aors;
+}
+
+/*
+ * Add a prefix.
+ */
+int v3_addr_add_prefix(IPAddrBlocks *addr,
+ const unsigned afi,
+ const unsigned *safi,
+ unsigned char *a,
+ const int prefixlen)
+{
+ IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
+ IPAddressOrRange *aor;
+ if (aors == NULL || !make_addressPrefix(&aor, a, prefixlen))
+ return 0;
+ if (sk_IPAddressOrRange_push(aors, aor))
+ return 1;
+ IPAddressOrRange_free(aor);
+ return 0;
+}
+
+/*
+ * Add a range.
+ */
+int v3_addr_add_range(IPAddrBlocks *addr,
+ const unsigned afi,
+ const unsigned *safi,
+ unsigned char *min,
+ unsigned char *max)
+{
+ IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
+ IPAddressOrRange *aor;
+ int length = length_from_afi(afi);
+ if (aors == NULL)
+ return 0;
+ if (!make_addressRange(&aor, min, max, length))
+ return 0;
+ if (sk_IPAddressOrRange_push(aors, aor))
+ return 1;
+ IPAddressOrRange_free(aor);
+ return 0;
+}
+
+/*
+ * Extract min and max values from an IPAddressOrRange.
+ */
+static void extract_min_max(IPAddressOrRange *aor,
+ unsigned char *min,
+ unsigned char *max,
+ int length)
+{
+ OPENSSL_assert(aor != NULL && min != NULL && max != NULL);
+ switch (aor->type) {
+ case IPAddressOrRange_addressPrefix:
+ addr_expand(min, aor->u.addressPrefix, length, 0x00);
+ addr_expand(max, aor->u.addressPrefix, length, 0xFF);
+ return;
+ case IPAddressOrRange_addressRange:
+ addr_expand(min, aor->u.addressRange->min, length, 0x00);
+ addr_expand(max, aor->u.addressRange->max, length, 0xFF);
+ return;
+ }
+}
+
+/*
+ * Public wrapper for extract_min_max().
+ */
+int v3_addr_get_range(IPAddressOrRange *aor,
+ const unsigned afi,
+ unsigned char *min,
+ unsigned char *max,
+ const int length)
+{
+ int afi_length = length_from_afi(afi);
+ if (aor == NULL || min == NULL || max == NULL ||
+ afi_length == 0 || length < afi_length ||
+ (aor->type != IPAddressOrRange_addressPrefix &&
+ aor->type != IPAddressOrRange_addressRange))
+ return 0;
+ extract_min_max(aor, min, max, afi_length);
+ return afi_length;
+}
+
+/*
+ * Sort comparision function for a sequence of IPAddressFamily.
+ *
+ * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about
+ * the ordering: I can read it as meaning that IPv6 without a SAFI
+ * comes before IPv4 with a SAFI, which seems pretty weird. The
+ * examples in appendix B suggest that the author intended the
+ * null-SAFI rule to apply only within a single AFI, which is what I
+ * would have expected and is what the following code implements.
+ */
+static int IPAddressFamily_cmp(const IPAddressFamily * const *a_,
+ const IPAddressFamily * const *b_)
+{
+ const ASN1_OCTET_STRING *a = (*a_)->addressFamily;
+ const ASN1_OCTET_STRING *b = (*b_)->addressFamily;
+ int len = ((a->length <= b->length) ? a->length : b->length);
+ int cmp = memcmp(a->data, b->data, len);
+ return cmp ? cmp : a->length - b->length;
+}
+
+/*
+ * Check whether an IPAddrBLocks is in canonical form.
+ */
+int v3_addr_is_canonical(IPAddrBlocks *addr)
+{
+ unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
+ unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
+ IPAddressOrRanges *aors;
+ int i, j, k;
+
+ /*
+ * Empty extension is cannonical.
+ */
+ if (addr == NULL)
+ return 1;
+
+ /*
+ * Check whether the top-level list is in order.
+ */
+ for (i = 0; i < sk_IPAddressFamily_num(addr) - 1; i++) {
+ const IPAddressFamily *a = sk_IPAddressFamily_value(addr, i);
+ const IPAddressFamily *b = sk_IPAddressFamily_value(addr, i + 1);
+ if (IPAddressFamily_cmp(&a, &b) >= 0)
+ return 0;
+ }
+
+ /*
+ * Top level's ok, now check each address family.
+ */
+ for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+ IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+ int length = length_from_afi(v3_addr_get_afi(f));
+
+ /*
+ * Inheritance is canonical. Anything other than inheritance or
+ * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something.
+ */
+ if (f == NULL || f->ipAddressChoice == NULL)
+ return 0;
+ switch (f->ipAddressChoice->type) {
+ case IPAddressChoice_inherit:
+ continue;
+ case IPAddressChoice_addressesOrRanges:
+ break;
+ default:
+ return 0;
+ }
+
+ /*
+ * It's an IPAddressOrRanges sequence, check it.
+ */
+ aors = f->ipAddressChoice->u.addressesOrRanges;
+ if (sk_IPAddressOrRange_num(aors) == 0)
+ return 0;
+ for (j = 0; j < sk_IPAddressOrRange_num(aors) - 1; j++) {
+ IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
+ IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, j + 1);
+
+ extract_min_max(a, a_min, a_max, length);
+ extract_min_max(b, b_min, b_max, length);
+
+ /*
+ * Punt misordered list, overlapping start, or inverted range.
+ */
+ if (memcmp(a_min, b_min, length) >= 0 ||
+ memcmp(a_min, a_max, length) > 0 ||
+ memcmp(b_min, b_max, length) > 0)
+ return 0;
+
+ /*
+ * Punt if adjacent or overlapping. Check for adjacency by
+ * subtracting one from b_min first.
+ */
+ for (k = length - 1; k >= 0 && b_min[k]-- == 0x00; k--)
+ ;
+ if (memcmp(a_max, b_min, length) >= 0)
+ return 0;
+
+ /*
+ * Check for range that should be expressed as a prefix.
+ */
+ if (a->type == IPAddressOrRange_addressRange &&
+ range_should_be_prefix(a_min, a_max, length) >= 0)
+ return 0;
+ }
+
+ /*
+ * Check final range to see if it should be a prefix.
+ */
+ j = sk_IPAddressOrRange_num(aors) - 1;
+ {
+ IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j);
+ if (a->type == IPAddressOrRange_addressRange) {
+ extract_min_max(a, a_min, a_max, length);
+ if (range_should_be_prefix(a_min, a_max, length) >= 0)
+ return 0;
+ }
+ }
+ }
+
+ /*
+ * If we made it through all that, we're happy.
+ */
+ return 1;
+}
+
+/*
+ * Whack an IPAddressOrRanges into canonical form.
+ */
+static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors,
+ const unsigned afi)
+{
+ int i, j, length = length_from_afi(afi);
+
+ /*
+ * Sort the IPAddressOrRanges sequence.
+ */
+ sk_IPAddressOrRange_sort(aors);
+
+ /*
+ * Clean up representation issues, punt on duplicates or overlaps.
+ */
+ for (i = 0; i < sk_IPAddressOrRange_num(aors) - 1; i++) {
+ IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, i);
+ IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, i + 1);
+ unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN];
+ unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN];
+
+ extract_min_max(a, a_min, a_max, length);
+ extract_min_max(b, b_min, b_max, length);
+
+ /*
+ * Punt overlaps.
+ */
+ if (memcmp(a_max, b_min, length) >= 0)
+ return 0;
+
+ /*
+ * Merge if a and b are adjacent. We check for
+ * adjacency by subtracting one from b_min first.
+ */
+ for (j = length - 1; j >= 0 && b_min[j]-- == 0x00; j--)
+ ;
+ if (memcmp(a_max, b_min, length) == 0) {
+ IPAddressOrRange *merged;
+ if (!make_addressRange(&merged, a_min, b_max, length))
+ return 0;
+ sk_IPAddressOrRange_set(aors, i, merged);
+ sk_IPAddressOrRange_delete(aors, i + 1);
+ IPAddressOrRange_free(a);
+ IPAddressOrRange_free(b);
+ --i;
+ continue;
+ }
+ }
+
+ return 1;
+}
+
+/*
+ * Whack an IPAddrBlocks extension into canonical form.
+ */
+int v3_addr_canonize(IPAddrBlocks *addr)
+{
+ int i;
+ for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+ IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+ if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
+ !IPAddressOrRanges_canonize(f->ipAddressChoice->u.addressesOrRanges,
+ v3_addr_get_afi(f)))
+ return 0;
+ }
+ sk_IPAddressFamily_set_cmp_func(addr, IPAddressFamily_cmp);
+ sk_IPAddressFamily_sort(addr);
+ OPENSSL_assert(v3_addr_is_canonical(addr));
+ return 1;
+}
+
+/*
+ * v2i handler for the IPAddrBlocks extension.
+ */
+static void *v2i_IPAddrBlocks(const struct v3_ext_method *method,
+ struct v3_ext_ctx *ctx,
+ STACK_OF(CONF_VALUE) *values)
+{
+ static const char v4addr_chars[] = "0123456789.";
+ static const char v6addr_chars[] = "0123456789.:abcdefABCDEF";
+ IPAddrBlocks *addr = NULL;
+ char *s = NULL, *t;
+ int i;
+
+ if ((addr = sk_IPAddressFamily_new(IPAddressFamily_cmp)) == NULL) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
+ CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
+ unsigned char min[ADDR_RAW_BUF_LEN], max[ADDR_RAW_BUF_LEN];
+ unsigned afi, *safi = NULL, safi_;
+ const char *addr_chars;
+ int prefixlen, i1, i2, delim, length;
+
+ if ( !name_cmp(val->name, "IPv4")) {
+ afi = IANA_AFI_IPV4;
+ } else if (!name_cmp(val->name, "IPv6")) {
+ afi = IANA_AFI_IPV6;
+ } else if (!name_cmp(val->name, "IPv4-SAFI")) {
+ afi = IANA_AFI_IPV4;
+ safi = &safi_;
+ } else if (!name_cmp(val->name, "IPv6-SAFI")) {
+ afi = IANA_AFI_IPV6;
+ safi = &safi_;
+ } else {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_NAME_ERROR);
+ X509V3_conf_err(val);
+ goto err;
+ }
+
+ switch (afi) {
+ case IANA_AFI_IPV4:
+ addr_chars = v4addr_chars;
+ break;
+ case IANA_AFI_IPV6:
+ addr_chars = v6addr_chars;
+ break;
+ }
+
+ length = length_from_afi(afi);
+
+ /*
+ * Handle SAFI, if any, and BUF_strdup() so we can null-terminate
+ * the other input values.
+ */
+ if (safi != NULL) {
+ *safi = strtoul(val->value, &t, 0);
+ t += strspn(t, " \t");
+ if (*safi > 0xFF || *t++ != ':') {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_SAFI);
+ X509V3_conf_err(val);
+ goto err;
+ }
+ t += strspn(t, " \t");
+ s = BUF_strdup(t);
+ } else {
+ s = BUF_strdup(val->value);
+ }
+ if (s == NULL) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /*
+ * Check for inheritance. Not worth additional complexity to
+ * optimize this (seldom-used) case.
+ */
+ if (!strcmp(s, "inherit")) {
+ if (!v3_addr_add_inherit(addr, afi, safi)) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_INHERITANCE);
+ X509V3_conf_err(val);
+ goto err;
+ }
+ OPENSSL_free(s);
+ s = NULL;
+ continue;
+ }
+
+ i1 = strspn(s, addr_chars);
+ i2 = i1 + strspn(s + i1, " \t");
+ delim = s[i2++];
+ s[i1] = '\0';
+
+ if (a2i_ipadd(min, s) != length) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
+ X509V3_conf_err(val);
+ goto err;
+ }
+
+ switch (delim) {
+ case '/':
+ prefixlen = (int) strtoul(s + i2, &t, 10);
+ if (t == s + i2 || *t != '\0') {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+ X509V3_conf_err(val);
+ goto err;
+ }
+ if (!v3_addr_add_prefix(addr, afi, safi, min, prefixlen)) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ break;
+ case '-':
+ i1 = i2 + strspn(s + i2, " \t");
+ i2 = i1 + strspn(s + i1, addr_chars);
+ if (i1 == i2 || s[i2] != '\0') {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+ X509V3_conf_err(val);
+ goto err;
+ }
+ if (a2i_ipadd(max, s + i1) != length) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS);
+ X509V3_conf_err(val);
+ goto err;
+ }
+ if (!v3_addr_add_range(addr, afi, safi, min, max)) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ break;
+ case '\0':
+ if (!v3_addr_add_prefix(addr, afi, safi, min, length * 8)) {
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ break;
+ default:
+ X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
+ X509V3_conf_err(val);
+ goto err;
+ }
+
+ OPENSSL_free(s);
+ s = NULL;
+ }
+
+ /*
+ * Canonize the result, then we're done.
+ */
+ if (!v3_addr_canonize(addr))
+ goto err;
+ return addr;
+
+ err:
+ OPENSSL_free(s);
+ sk_IPAddressFamily_pop_free(addr, IPAddressFamily_free);
+ return NULL;
+}
+
+/*
+ * OpenSSL dispatch
+ */
+const X509V3_EXT_METHOD v3_addr = {
+ NID_sbgp_ipAddrBlock, /* nid */
+ 0, /* flags */
+ ASN1_ITEM_ref(IPAddrBlocks), /* template */
+ 0, 0, 0, 0, /* old functions, ignored */
+ 0, /* i2s */
+ 0, /* s2i */
+ 0, /* i2v */
+ v2i_IPAddrBlocks, /* v2i */
+ i2r_IPAddrBlocks, /* i2r */
+ 0, /* r2i */
+ NULL /* extension-specific data */
+};
+
+/*
+ * Figure out whether extension sues inheritance.
+ */
+int v3_addr_inherits(IPAddrBlocks *addr)
+{
+ int i;
+ if (addr == NULL)
+ return 0;
+ for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
+ IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
+ if (f->ipAddressChoice->type == IPAddressChoice_inherit)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Figure out whether parent contains child.
+ */
+static int addr_contains(IPAddressOrRanges *parent,
+ IPAddressOrRanges *child,
+ int length)
+{
+ unsigned char p_min[ADDR_RAW_BUF_LEN], p_max[ADDR_RAW_BUF_LEN];
+ unsigned char c_min[ADDR_RAW_BUF_LEN], c_max[ADDR_RAW_BUF_LEN];
+ int p, c;
+
+ if (child == NULL || parent == child)
+ return 1;
+ if (parent == NULL)
+ return 0;
+
+ p = 0;
+ for (c = 0; c < sk_IPAddressOrRange_num(child); c++) {
+ extract_min_max(sk_IPAddressOrRange_value(child, c),
+ c_min, c_max, length);
+ for (;; p++) {
+ if (p >= sk_IPAddressOrRange_num(parent))
+ return 0;
+ extract_min_max(sk_IPAddressOrRange_value(parent, p),
+ p_min, p_max, length);
+ if (memcmp(p_max, c_max, length) < 0)
+ continue;
+ if (memcmp(p_min, c_min, length) > 0)
+ return 0;
+ break;
+ }
+ }
+
+ return 1;
+}
+
+/*
+ * Test whether a is a subset of b.
+ */
+int v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b)
+{
+ int i;
+ if (a == NULL || a == b)
+ return 1;
+ if (b == NULL || v3_addr_inherits(a) || v3_addr_inherits(b))
+ return 0;
+ sk_IPAddressFamily_set_cmp_func(b, IPAddressFamily_cmp);
+ for (i = 0; i < sk_IPAddressFamily_num(a); i++) {
+ IPAddressFamily *fa = sk_IPAddressFamily_value(a, i);
+ int j = sk_IPAddressFamily_find(b, fa);
+ IPAddressFamily *fb;
+ fb = sk_IPAddressFamily_value(b, j);
+ if (fb == NULL)
+ return 0;
+ if (!addr_contains(fb->ipAddressChoice->u.addressesOrRanges,
+ fa->ipAddressChoice->u.addressesOrRanges,
+ length_from_afi(v3_addr_get_afi(fb))))
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Validation error handling via callback.
+ */
+#define validation_err(_err_) \
+ do { \
+ if (ctx != NULL) { \
+ ctx->error = _err_; \
+ ctx->error_depth = i; \
+ ctx->current_cert = x; \
+ ret = ctx->verify_cb(0, ctx); \
+ } else { \
+ ret = 0; \
+ } \
+ if (!ret) \
+ goto done; \
+ } while (0)
+
+/*
+ * Core code for RFC 3779 2.3 path validation.
+ */
+static int v3_addr_validate_path_internal(X509_STORE_CTX *ctx,
+ STACK_OF(X509) *chain,
+ IPAddrBlocks *ext)
+{
+ IPAddrBlocks *child = NULL;
+ int i, j, ret = 1;
+ X509 *x;
+
+ OPENSSL_assert(chain != NULL && sk_X509_num(chain) > 0);
+ OPENSSL_assert(ctx != NULL || ext != NULL);
+ OPENSSL_assert(ctx == NULL || ctx->verify_cb != NULL);
+
+ /*
+ * Figure out where to start. If we don't have an extension to
+ * check, we're done. Otherwise, check canonical form and
+ * set up for walking up the chain.
+ */
+ if (ext != NULL) {
+ i = -1;
+ x = NULL;
+ } else {
+ i = 0;
+ x = sk_X509_value(chain, i);
+ OPENSSL_assert(x != NULL);
+ if ((ext = x->rfc3779_addr) == NULL)
+ goto done;
+ }
+ if (!v3_addr_is_canonical(ext))
+ validation_err(X509_V_ERR_INVALID_EXTENSION);
+ sk_IPAddressFamily_set_cmp_func(ext, IPAddressFamily_cmp);
+ if ((child = sk_IPAddressFamily_dup(ext)) == NULL) {
+ X509V3err(X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL, ERR_R_MALLOC_FAILURE);
+ ret = 0;
+ goto done;
+ }
+
+ /*
+ * Now walk up the chain. No cert may list resources that its
+ * parent doesn't list.
+ */
+ for (i++; i < sk_X509_num(chain); i++) {
+ x = sk_X509_value(chain, i);
+ OPENSSL_assert(x != NULL);
+ if (!v3_addr_is_canonical(x->rfc3779_addr))
+ validation_err(X509_V_ERR_INVALID_EXTENSION);
+ if (x->rfc3779_addr == NULL) {
+ for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
+ IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
+ if (fc->ipAddressChoice->type != IPAddressChoice_inherit) {
+ validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+ break;
+ }
+ }
+ continue;
+ }
+ sk_IPAddressFamily_set_cmp_func(x->rfc3779_addr, IPAddressFamily_cmp);
+ for (j = 0; j < sk_IPAddressFamily_num(child); j++) {
+ IPAddressFamily *fc = sk_IPAddressFamily_value(child, j);
+ int k = sk_IPAddressFamily_find(x->rfc3779_addr, fc);
+ IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, k);
+ if (fp == NULL) {
+ if (fc->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
+ validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+ break;
+ }
+ continue;
+ }
+ if (fp->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) {
+ if (fc->ipAddressChoice->type == IPAddressChoice_inherit ||
+ addr_contains(fp->ipAddressChoice->u.addressesOrRanges,
+ fc->ipAddressChoice->u.addressesOrRanges,
+ length_from_afi(v3_addr_get_afi(fc))))
+ sk_IPAddressFamily_set(child, j, fp);
+ else
+ validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+ }
+ }
+ }
+
+ /*
+ * Trust anchor can't inherit.
+ */
+ OPENSSL_assert(x != NULL);
+ if (x->rfc3779_addr != NULL) {
+ for (j = 0; j < sk_IPAddressFamily_num(x->rfc3779_addr); j++) {
+ IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, j);
+ if (fp->ipAddressChoice->type == IPAddressChoice_inherit &&
+ sk_IPAddressFamily_find(child, fp) >= 0)
+ validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+ }
+ }
+
+ done:
+ sk_IPAddressFamily_free(child);
+ return ret;
+}
+
+#undef validation_err
+
+/*
+ * RFC 3779 2.3 path validation -- called from X509_verify_cert().
+ */
+int v3_addr_validate_path(X509_STORE_CTX *ctx)
+{
+ return v3_addr_validate_path_internal(ctx, ctx->chain, NULL);
+}
+
+/*
+ * RFC 3779 2.3 path validation of an extension.
+ * Test whether chain covers extension.
+ */
+int v3_addr_validate_resource_set(STACK_OF(X509) *chain,
+ IPAddrBlocks *ext,
+ int allow_inheritance)
+{
+ if (ext == NULL)
+ return 1;
+ if (chain == NULL || sk_X509_num(chain) == 0)
+ return 0;
+ if (!allow_inheritance && v3_addr_inherits(ext))
+ return 0;
+ return v3_addr_validate_path_internal(NULL, chain, ext);
+}
+
+#endif /* OPENSSL_NO_RFC3779 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-09 04:02:30 +0000