svn merge ^/branches/released .

1 files changed, 1293 insertions, 1287 deletions

diff --git a/openssl/crypto/x509v3/v3_addr.c b/openssl/crypto/x509v3/v3_addr.c
index 9087d66e0..247d671a8 100644
--- a/openssl/crypto/x509v3/v3_addr.c
+++ b/openssl/crypto/x509v3/v3_addr.c
@@ -1,1287 +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;
-
-  switch (afi) {
-  case IANA_AFI_IPV4:
-    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:
-    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 */