/*
* Copyright (C) 2006 American Registry for Internet Numbers ("ARIN")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ARIN DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ARIN BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id$ */
/*
* Initial attempt to implement RFC 3779 section 2. I'd be very
* surprised if this even compiled yet, as I'm still figuring out
* OpenSSL's ASN.1 template goop.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "cryptlib.h"
#include <openssl/conf.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/x509v3.h>
/*
* 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_SEQUENCE_OF(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)
IMPLEMENT_ASN1_FUNCTIONS(IPAddrBlocks)
/*
* How much buffer space do we need for a raw address?
*/
#define ADDR_RAW_BUF_LEN 16
/*
* How much buffer space do we need for the text form of an address?
* Output routines (inet_ntop() or whatever) must check for overflow.
*/
#define ADDR_TXT_BUF_LEN 48
/*
* 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)
{
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) ((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];
char buf[ADDR_TXT_BUF_LEN];
int i;
switch (afi) {
case IANA_AFI_IPV4:
addr_expand(addr, bs, 4, fill);
if (inet_ntop(AF_INET, addr, buf, sizeof(buf)) == NULL)
return 0;
BIO_puts(out, buf);
break;
case IANA_AFI_IPV6:
addr_expand(addr, bs, 16, fill);
if (inet_ntop(AF_INET6, addr, buf, sizeof(buf)) == NULL)
return 0;
BIO_puts(out, buf);
break;
default:
for (i = 0; i < bs->length; i++)
BIO_printf(out, "%s%02x", (i > 0 ? ":" : ""), bs->data[i]);
BIO_printf(out, "[%d]", 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_num(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(X509V3_EXT_METHOD *method,
const void *ext,
BIO *out,
const int indent)
{
const IPAddrBlocks *addr = ext;
int i;
for (i = 0; i < sk_IPAddrBlocks_num(addr); i++) {
const IPAddressFamily *f = sk_IPAddrBlocks_value(addr, i);
const unsigned afi = ((f->addressFamily->data[0] << 8) |
(f->addressFamily->data[1]));
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, prefixlen_b;
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,
const unsigned char *addr,
const int prefixlength)
{
int bytelen = (prefixlength + 7) / 8, bitlen = prefixlen % 8;
IPAddressOrRange *aor = IPAddressOrRange_new();
if (aor == NULL)
return 0;
aor->type = IPAddressOrRange_addressPrefix;
if ((aor->addressPrefix = ASN1_BIT_STRING_new()) == NULL)
goto err;
if (!ASN1_BIT_STRING_set(bs, addr, bytelen))
goto err;
bs->flags &= ~7;
bs->flags |= ASN1_STRING_FLAG_BITS_LEFT;
if (bitlen > 0) {
bs->data[bytelen - 1] &= ~(0xFF >> bitlen);
bs->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,
const unsigned char *min_,
const unsigned char *max_,
const unsigned 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;
if ((aor->u.addressRange = IPAddressRange_new()) == NULL)
goto err;
aor->u.addressRange->min = ASN1_BIT_STRING_new();
aor->u.addressRange->max = ASN1_BIT_STRING_new();
if (aor->u.addressRange->min == NULL || aor->u.addressRange->max == NULL)
goto err;
i = length;
while (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 (j < 8 && (b & (0xFF >> j)) != 0)
++j;
assert(j < 8);
aor->u.addressRange->min->flags |= j;
}
i = length;
while (i > 0 && aor->u.addressRange->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 (j < 8 && (b & (0xFF >> j)) != (0xFF >> j))
++j;
assert(j < 8);
aor->u.addressRange->max->flags |= 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 = safi == NULL ? 2 : 3;
int i;
key[0] = (afi >> 8) & 0xFF;
key[1] = afi & 0xFF;
if (safi != NULL)
key[2] = *safi & 0xFF;
for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
*f = sk_IPAddressFamily_value(addr, i);
if (!memcmp(f->addressFamily, key, keylen))
return f;
}
if ((f = IPAddressFamily_new()) == NULL)
return NULL;
if ((f->ipAddressChoice = IPAddressChoice_new()) == NULL ||
(f->addressFamily = ASN1_OCTET_STRING_new()) == NULL ||
!ASN1_OCTET_STRING_set(f->addressFamily, key, keylen))
goto err;
memset(f->ipAddressChoice, 0, sizeof(*f->ipAddressChoice));
if (!sk_IPAddressFamily_push(addr, f))
goto err;
return f;
err:
IPAddressFamily_free(f);
return NULL;
}
/*
* Add an inheritance element.
*/
static int 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 = ASN1_NULL_new()) == NULL)
return 0;
f->ipAddressChoice->type = IPAddressChoice_inherit;
return 1;
}
/*
* Construct an IPAddressOrRanges 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.
*/
static int addr_add_prefix(IPAddrBlocks *addr,
const unsigned afi,
const unsigned *safi,
const unsigned char *addr,
const int prefixlen)
{
IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
IPAddressOrRange *aor;
if (aors == NULL || !make_addressPrefix(&aor, addr, prefixlen))
return 0;
if (sk_IPAddressOrRange_push(aors, aor))
return 1;
IPAddressOrRange_free(aor);
return 0;
}
/*
* Add a range.
*/
static int addr_add_range(IPAddrBlocks *addr,
const unsigned afi,
const unsigned *safi,
const unsigned char *min,
const unsigned char *max)
{
IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi);
IPAddressOrRange *aor;
unsigned length;
if (aors == NULL)
return 0;
switch (afi) {
case IANA_AFI_IPV4:
length = 4;
break;
case IANA_AFI_IPV6:
length = 16;
break;
}
if (!make_addressRange(&aor, min, max, length))
return 0;
if (sk_IPAddressOrRange_push(aors, aor))
return 1;
IPAddressOrRange_free(aor);
return 0;
}
/*
* Whack an IPAddressOrRanges into canonical form.
*/
static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors,
const unsigned afi)
{
int i, j, length;
switch (afi) {
case IANA_AFI_IPV4:
length = 4;
break;
case IANA_AFI_IPV6:
length = 16;
break;
}
/*
* Sort the IPAddressOrRanges sequence.
*/
sk_IPAddressOrRange_sort(aors);
/*
* Resolve any 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];
/*
* Expand all the addresses once and get it over with.
*/
switch (a->type) {
case IPAddressOrRange_addressPrefix:
addr_expand(a_min, a->u.addressPrefix, length, 0x00);
addr_expand(a_max, a->u.addressPrefix, length, 0xFF);
break;
case IPAddressOrRange_addressRange:
addr_expand(a_min, a->u.addressRange->min, length, 0x00);
addr_expand(a_max, a->u.addressRange->max, length, 0xFF);
break;
}
switch (b->type) {
case IPAddressOrRange_addressPrefix:
addr_expand(b_min, b->u.addressPrefix, length, 0x00);
addr_expand(b_max, b->u.addressPrefix, length, 0xFF);
break;
case IPAddressOrRange_addressRange:
addr_expand(b_min, b->u.addressRange->min, length, 0x00);
addr_expand(b_max, b->u.addressRange->min, length, 0xFF);
break;
}
/*
* Make sure we're sorted properly (paranoia).
*/
assert(memcmp(a_min, b_min, length) <= 0);
/*
* If a contains b, we can just get rid of b.
*/
if (memcmp(a_max, b_max, length) >= 0) {
sk_IPAddressOrRange_delete(aors, i + 1);
aor_cleanup(b);
--i;
continue;
}
/*
* If a and b are adjacent or overlap, merge them. 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);
aor_cleanup(a);
aor_cleanup(b);
--i;
continue;
}
}
return 1;
}
/*
* Sort comparision function for a sequence of IPAddressFamily.
*/
static int IPAddressFamily_cmp(const IPAddressFamily * const *a,
const IPAddressFamily * const *b)
{
return ASN1_OCTET_STRING_cmp((*a)->addressFamily,
(*b)->addressFamily);
}
/*
* v2i handler for the IPAddrBlocks extension.
*/
static void *v2i_IPAddrBlocks(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 *addr_chars;
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_;
char *s = val->value;
int prefixlen, af;
if ( !strcmp(val->name, "ipv4")) {
afi = IANA_AFI_IPV4;
} else if (!strcmp(val->name, "ipv6")) {
afi = IANA_AFI_IPV6;
} else if (!strcmp(val->name, "ipv4-safi")) {
afi = IANA_AFI_IPV4;
safi = &safi_;
} else if (!strcmp(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;
}
if (safi != NULL) {
safi = strtoul(val->value, &s, 0);
s += strspn(s, " \t");
if (safi > 0xFF || *s++ != ':') {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
s += strspn(s, " \t");
}
if (!strcmp(s, "inherit")) {
if (addr_add_inherit(addr, afi, safi))
continue;
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_INHERITANCE);
X509V3_conf_err(val);
goto err;
}
switch (afi) {
case IANA_AFI_IPV4:
af = AF_INET;
addr_chars = v4addr_chars;
break;
case IANA_AFI_IPV6:
af = AF_INET6;
addr_chars = v6addr_chars;
break;
}
if (inet_pton(af, s, min) != 1) {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
s += strspn(s, addr_chars);
s += strspn(s, " \t");
switch (*s++) {
case '/':
prefixlen = (int) strtoul(s, &s, 10);
s += strspn(s, " \t");
if (*s != '\0') {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
if (!addr_add_prefix(addr, afi, safi, min, prefixlen)) {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
X509V3_conf_err(val);
goto err;
}
break;
case '-':
s += strspn(s, " \t");
if (inet_pton(af, s, max) != 1) {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
s += strspn(s, addr_chars);
s += strspn(s, " \t");
if (*s != '\0') {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
if (!addr_add_range(addr, afi, safi, min, max)) {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
X509V3_conf_err(val);
goto err;
}
break;
case '\0':
if (!addr_add_range(addr, afi, safi, min, min)) {
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE);
X509V3_conf_err(val);
goto err;
}
break;
default:
X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR);
X509V3_conf_err(val);
goto err;
}
}
/*
* Canonize the result, then we're done.
*/
for (i = 0; i < sk_IPAddressFamily_num(addr); i++) {
IPAddressFamily *f = sk_IPAddressFamily_value(addr, i);
unsigned afi = ((f->addressFamily->data[0] << 8) |
(f->addressFamily->data[1]));
if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges &&
!IPAddressOrRanges_canonize(f->ipAddressChoice->u.addressesOrRanges,
afi))
goto err;
}
sk_IPAddressFamily_sort(addr);
return addr;
err:
IPAddrBlocks_free(addr);
return NULL;
}
/*
* OpenSSL dispatch
*/
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 */
};