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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.6.
package org.bouncycastle.jce.provider;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERIA5String;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralSubtree;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Strings;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class PKIXNameConstraintValidator
{
private Set excludedSubtreesDN = new HashSet();
private Set excludedSubtreesDNS = new HashSet();
private Set excludedSubtreesEmail = new HashSet();
private Set excludedSubtreesURI = new HashSet();
private Set excludedSubtreesIP = new HashSet();
private Set permittedSubtreesDN;
private Set permittedSubtreesDNS;
private Set permittedSubtreesEmail;
private Set permittedSubtreesURI;
private Set permittedSubtreesIP;
public PKIXNameConstraintValidator()
{
}
private static boolean withinDNSubtree(
ASN1Sequence dns,
ASN1Sequence subtree)
{
if (subtree.size() < 1)
{
return false;
}
if (subtree.size() > dns.size())
{
return false;
}
for (int j = subtree.size() - 1; j >= 0; j--)
{
if (!subtree.getObjectAt(j).equals(dns.getObjectAt(j)))
{
return false;
}
}
return true;
}
public void checkPermittedDN(ASN1Sequence dns)
throws PKIXNameConstraintValidatorException
{
checkPermittedDN(permittedSubtreesDN, dns);
}
public void checkExcludedDN(ASN1Sequence dns)
throws PKIXNameConstraintValidatorException
{
checkExcludedDN(excludedSubtreesDN, dns);
}
private void checkPermittedDN(Set permitted, ASN1Sequence dns)
throws PKIXNameConstraintValidatorException
{
if (permitted == null)
{
return;
}
if (permitted.isEmpty() && dns.size() == 0)
{
return;
}
Iterator it = permitted.iterator();
while (it.hasNext())
{
ASN1Sequence subtree = (ASN1Sequence)it.next();
if (withinDNSubtree(dns, subtree))
{
return;
}
}
throw new PKIXNameConstraintValidatorException(
"Subject distinguished name is not from a permitted subtree");
}
private void checkExcludedDN(Set excluded, ASN1Sequence dns)
throws PKIXNameConstraintValidatorException
{
if (excluded.isEmpty())
{
return;
}
Iterator it = excluded.iterator();
while (it.hasNext())
{
ASN1Sequence subtree = (ASN1Sequence)it.next();
if (withinDNSubtree(dns, subtree))
{
throw new PKIXNameConstraintValidatorException(
"Subject distinguished name is from an excluded subtree");
}
}
}
private Set intersectDN(Set permitted, Set dns)
{
Set intersect = new HashSet();
for (Iterator it = dns.iterator(); it.hasNext();)
{
ASN1Sequence dn = ASN1Sequence.getInstance(((GeneralSubtree)it
.next()).getBase().getName().getDERObject());
if (permitted == null)
{
if (dn != null)
{
intersect.add(dn);
}
}
else
{
Iterator _iter = permitted.iterator();
while (_iter.hasNext())
{
ASN1Sequence subtree = (ASN1Sequence)_iter.next();
if (withinDNSubtree(dn, subtree))
{
intersect.add(dn);
}
else if (withinDNSubtree(subtree, dn))
{
intersect.add(subtree);
}
}
}
}
return intersect;
}
private Set unionDN(Set excluded, ASN1Sequence dn)
{
if (excluded.isEmpty())
{
if (dn == null)
{
return excluded;
}
excluded.add(dn);
return excluded;
}
else
{
Set intersect = new HashSet();
Iterator it = excluded.iterator();
while (it.hasNext())
{
ASN1Sequence subtree = (ASN1Sequence)it.next();
if (withinDNSubtree(dn, subtree))
{
intersect.add(subtree);
}
else if (withinDNSubtree(subtree, dn))
{
intersect.add(dn);
}
else
{
intersect.add(subtree);
intersect.add(dn);
}
}
return intersect;
}
}
private Set intersectEmail(Set permitted, Set emails)
{
Set intersect = new HashSet();
for (Iterator it = emails.iterator(); it.hasNext();)
{
String email = extractNameAsString(((GeneralSubtree)it.next())
.getBase());
if (permitted == null)
{
if (email != null)
{
intersect.add(email);
}
}
else
{
Iterator it2 = permitted.iterator();
while (it2.hasNext())
{
String _permitted = (String)it2.next();
intersectEmail(email, _permitted, intersect);
}
}
}
return intersect;
}
private Set unionEmail(Set excluded, String email)
{
if (excluded.isEmpty())
{
if (email == null)
{
return excluded;
}
excluded.add(email);
return excluded;
}
else
{
Set union = new HashSet();
Iterator it = excluded.iterator();
while (it.hasNext())
{
String _excluded = (String)it.next();
unionEmail(_excluded, email, union);
}
return union;
}
}
/**
* Returns the intersection of the permitted IP ranges in
* permitted with ip.
*
* @param permitted A Set of permitted IP addresses with
* their subnet mask as byte arrays.
* @param ips The IP address with its subnet mask.
* @return The Set of permitted IP ranges intersected with
* ip.
*/
private Set intersectIP(Set permitted, Set ips)
{
Set intersect = new HashSet();
for (Iterator it = ips.iterator(); it.hasNext();)
{
byte[] ip = ASN1OctetString.getInstance(
((GeneralSubtree)it.next()).getBase().getName()).getOctets();
if (permitted == null)
{
if (ip != null)
{
intersect.add(ip);
}
}
else
{
Iterator it2 = permitted.iterator();
while (it2.hasNext())
{
byte[] _permitted = (byte[])it2.next();
intersect.addAll(intersectIPRange(_permitted, ip));
}
}
}
return intersect;
}
/**
* Returns the union of the excluded IP ranges in excluded
* with ip.
*
* @param excluded A Set of excluded IP addresses with their
* subnet mask as byte arrays.
* @param ip The IP address with its subnet mask.
* @return The Set of excluded IP ranges unified with
* ip as byte arrays.
*/
private Set unionIP(Set excluded, byte[] ip)
{
if (excluded.isEmpty())
{
if (ip == null)
{
return excluded;
}
excluded.add(ip);
return excluded;
}
else
{
Set union = new HashSet();
Iterator it = excluded.iterator();
while (it.hasNext())
{
byte[] _excluded = (byte[])it.next();
union.addAll(unionIPRange(_excluded, ip));
}
return union;
}
}
/**
* Calculates the union if two IP ranges.
*
* @param ipWithSubmask1 The first IP address with its subnet mask.
* @param ipWithSubmask2 The second IP address with its subnet mask.
* @return A Set with the union of both addresses.
*/
private Set unionIPRange(byte[] ipWithSubmask1, byte[] ipWithSubmask2)
{
Set set = new HashSet();
// difficult, adding always all IPs is not wrong
if (Arrays.areEqual(ipWithSubmask1, ipWithSubmask2))
{
set.add(ipWithSubmask1);
}
else
{
set.add(ipWithSubmask1);
set.add(ipWithSubmask2);
}
return set;
}
/**
* Calculates the interesction if two IP ranges.
*
* @param ipWithSubmask1 The first IP address with its subnet mask.
* @param ipWithSubmask2 The second IP address with its subnet mask.
* @return A Set with the single IP address with its subnet
* mask as a byte array or an empty Set.
*/
private Set intersectIPRange(byte[] ipWithSubmask1, byte[] ipWithSubmask2)
{
if (ipWithSubmask1.length != ipWithSubmask2.length)
{
return Collections.EMPTY_SET;
}
byte[][] temp = extractIPsAndSubnetMasks(ipWithSubmask1, ipWithSubmask2);
byte ip1[] = temp[0];
byte subnetmask1[] = temp[1];
byte ip2[] = temp[2];
byte subnetmask2[] = temp[3];
byte minMax[][] = minMaxIPs(ip1, subnetmask1, ip2, subnetmask2);
byte[] min;
byte[] max;
max = min(minMax[1], minMax[3]);
min = max(minMax[0], minMax[2]);
// minimum IP address must be bigger than max
if (compareTo(min, max) == 1)
{
return Collections.EMPTY_SET;
}
// OR keeps all significant bits
byte[] ip = or(minMax[0], minMax[2]);
byte[] subnetmask = or(subnetmask1, subnetmask2);
return Collections.singleton(ipWithSubnetMask(ip, subnetmask));
}
/**
* Concatenates the IP address with its subnet mask.
*
* @param ip The IP address.
* @param subnetMask Its subnet mask.
* @return The concatenated IP address with its subnet mask.
*/
private byte[] ipWithSubnetMask(byte[] ip, byte[] subnetMask)
{
int ipLength = ip.length;
byte[] temp = new byte[ipLength * 2];
System.arraycopy(ip, 0, temp, 0, ipLength);
System.arraycopy(subnetMask, 0, temp, ipLength, ipLength);
return temp;
}
/**
* Splits the IP addresses and their subnet mask.
*
* @param ipWithSubmask1 The first IP address with the subnet mask.
* @param ipWithSubmask2 The second IP address with the subnet mask.
* @return An array with two elements. Each element contains the IP address
* and the subnet mask in this order.
*/
private byte[][] extractIPsAndSubnetMasks(
byte[] ipWithSubmask1,
byte[] ipWithSubmask2)
{
int ipLength = ipWithSubmask1.length / 2;
byte ip1[] = new byte[ipLength];
byte subnetmask1[] = new byte[ipLength];
System.arraycopy(ipWithSubmask1, 0, ip1, 0, ipLength);
System.arraycopy(ipWithSubmask1, ipLength, subnetmask1, 0, ipLength);
byte ip2[] = new byte[ipLength];
byte subnetmask2[] = new byte[ipLength];
System.arraycopy(ipWithSubmask2, 0, ip2, 0, ipLength);
System.arraycopy(ipWithSubmask2, ipLength, subnetmask2, 0, ipLength);
return new byte[][]
{ip1, subnetmask1, ip2, subnetmask2};
}
/**
* Based on the two IP addresses and their subnet masks the IP range is
* computed for each IP address - subnet mask pair and returned as the
* minimum IP address and the maximum address of the range.
*
* @param ip1 The first IP address.
* @param subnetmask1 The subnet mask of the first IP address.
* @param ip2 The second IP address.
* @param subnetmask2 The subnet mask of the second IP address.
* @return A array with two elements. The first/second element contains the
* min and max IP address of the first/second IP address and its
* subnet mask.
*/
private byte[][] minMaxIPs(
byte[] ip1,
byte[] subnetmask1,
byte[] ip2,
byte[] subnetmask2)
{
int ipLength = ip1.length;
byte[] min1 = new byte[ipLength];
byte[] max1 = new byte[ipLength];
byte[] min2 = new byte[ipLength];
byte[] max2 = new byte[ipLength];
for (int i = 0; i < ipLength; i++)
{
min1[i] = (byte)(ip1[i] & subnetmask1[i]);
max1[i] = (byte)(ip1[i] & subnetmask1[i] | ~subnetmask1[i]);
min2[i] = (byte)(ip2[i] & subnetmask2[i]);
max2[i] = (byte)(ip2[i] & subnetmask2[i] | ~subnetmask2[i]);
}
return new byte[][]{min1, max1, min2, max2};
}
private void checkPermittedEmail(Set permitted, String email)
throws PKIXNameConstraintValidatorException
{
if (permitted == null)
{
return;
}
Iterator it = permitted.iterator();
while (it.hasNext())
{
String str = ((String)it.next());
if (emailIsConstrained(email, str))
{
return;
}
}
if (email.length() == 0 && permitted.size() == 0)
{
return;
}
throw new PKIXNameConstraintValidatorException(
"Subject email address is not from a permitted subtree.");
}
private void checkExcludedEmail(Set excluded, String email)
throws PKIXNameConstraintValidatorException
{
if (excluded.isEmpty())
{
return;
}
Iterator it = excluded.iterator();
while (it.hasNext())
{
String str = (String)it.next();
if (emailIsConstrained(email, str))
{
throw new PKIXNameConstraintValidatorException(
"Email address is from an excluded subtree.");
}
}
}
/**
* Checks if the IP ip is included in the permitted set
* permitted.
*
* @param permitted A Set of permitted IP addresses with
* their subnet mask as byte arrays.
* @param ip The IP address.
* @throws PKIXNameConstraintValidatorException
* if the IP is not permitted.
*/
private void checkPermittedIP(Set permitted, byte[] ip)
throws PKIXNameConstraintValidatorException
{
if (permitted == null)
{
return;
}
Iterator it = permitted.iterator();
while (it.hasNext())
{
byte[] ipWithSubnet = (byte[])it.next();
if (isIPConstrained(ip, ipWithSubnet))
{
return;
}
}
if (ip.length == 0 && permitted.size() == 0)
{
return;
}
throw new PKIXNameConstraintValidatorException(
"IP is not from a permitted subtree.");
}
/**
* Checks if the IP ip is included in the excluded set
* excluded.
*
* @param excluded A Set of excluded IP addresses with their
* subnet mask as byte arrays.
* @param ip The IP address.
* @throws PKIXNameConstraintValidatorException
* if the IP is excluded.
*/
private void checkExcludedIP(Set excluded, byte[] ip)
throws PKIXNameConstraintValidatorException
{
if (excluded.isEmpty())
{
return;
}
Iterator it = excluded.iterator();
while (it.hasNext())
{
byte[] ipWithSubnet = (byte[])it.next();
if (isIPConstrained(ip, ipWithSubnet))
{
throw new PKIXNameConstraintValidatorException(
"IP is from an excluded subtree.");
}
}
}
/**
* Checks if the IP address ip is constrained by
* constraint.
*
* @param ip The IP address.
* @param constraint The constraint. This is an IP address concatenated with
* its subnetmask.
* @return true if constrained, false
* otherwise.
*/
private boolean isIPConstrained(byte ip[], byte[] constraint)
{
int ipLength = ip.length;
if (ipLength != (constraint.length / 2))
{
return false;
}
byte[] subnetMask = new byte[ipLength];
System.arraycopy(constraint, ipLength, subnetMask, 0, ipLength);
byte[] permittedSubnetAddress = new byte[ipLength];
byte[] ipSubnetAddress = new byte[ipLength];
// the resulting IP address by applying the subnet mask
for (int i = 0; i < ipLength; i++)
{
permittedSubnetAddress[i] = (byte)(constraint[i] & subnetMask[i]);
ipSubnetAddress[i] = (byte)(ip[i] & subnetMask[i]);
}
return Arrays.areEqual(permittedSubnetAddress, ipSubnetAddress);
}
private boolean emailIsConstrained(String email, String constraint)
{
String sub = email.substring(email.indexOf('@') + 1);
// a particular mailbox
if (constraint.indexOf('@') != -1)
{
if (email.equalsIgnoreCase(constraint))
{
return true;
}
}
// on particular host
else if (!(constraint.charAt(0) == '.'))
{
if (sub.equalsIgnoreCase(constraint))
{
return true;
}
}
// address in sub domain
else if (withinDomain(sub, constraint))
{
return true;
}
return false;
}
private boolean withinDomain(String testDomain, String domain)
{
String tempDomain = domain;
if (tempDomain.startsWith("."))
{
tempDomain = tempDomain.substring(1);
}
String[] domainParts = Strings.split(tempDomain, '.');
String[] testDomainParts = Strings.split(testDomain, '.');
// must have at least one subdomain
if (testDomainParts.length <= domainParts.length)
{
return false;
}
int d = testDomainParts.length - domainParts.length;
for (int i = -1; i < domainParts.length; i++)
{
if (i == -1)
{
if (testDomainParts[i + d].equals(""))
{
return false;
}
}
else if (!domainParts[i].equalsIgnoreCase(testDomainParts[i + d]))
{
return false;
}
}
return true;
}
private void checkPermittedDNS(Set permitted, String dns)
throws PKIXNameConstraintValidatorException
{
if (permitted == null)
{
return;
}
Iterator it = permitted.iterator();
while (it.hasNext())
{
String str = ((String)it.next());
// is sub domain
if (withinDomain(dns, str) || dns.equalsIgnoreCase(str))
{
return;
}
}
if (dns.length() == 0 && permitted.size() == 0)
{
return;
}
throw new PKIXNameConstraintValidatorException(
"DNS is not from a permitted subtree.");
}
private void checkExcludedDNS(Set excluded, String dns)
throws PKIXNameConstraintValidatorException
{
if (excluded.isEmpty())
{
return;
}
Iterator it = excluded.iterator();
while (it.hasNext())
{
String str = ((String)it.next());
// is sub domain or the same
if (withinDomain(dns, str) || dns.equalsIgnoreCase(str))
{
throw new PKIXNameConstraintValidatorException(
"DNS is from an excluded subtree.");
}
}
}
/**
* The common part of email1 and email2 is
* added to the union union. If email1 and
* email2 have nothing in common they are added both.
*
* @param email1 Email address constraint 1.
* @param email2 Email address constraint 2.
* @param union The union.
*/
private void unionEmail(String email1, String email2, Set union)
{
// email1 is a particular address
if (email1.indexOf('@') != -1)
{
String _sub = email1.substring(email1.indexOf('@') + 1);
// both are a particular mailbox
if (email2.indexOf('@') != -1)
{
if (email1.equalsIgnoreCase(email2))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(_sub, email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a particular host
else
{
if (_sub.equalsIgnoreCase(email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
// email1 specifies a domain
else if (email1.startsWith("."))
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (withinDomain(_sub, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2)
|| email1.equalsIgnoreCase(email2))
{
union.add(email2);
}
else if (withinDomain(email2, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
else
{
if (withinDomain(email2, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
// email specifies a host
else
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (_sub.equalsIgnoreCase(email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a particular host
else
{
if (email1.equalsIgnoreCase(email2))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
}
private void unionURI(String email1, String email2, Set union)
{
// email1 is a particular address
if (email1.indexOf('@') != -1)
{
String _sub = email1.substring(email1.indexOf('@') + 1);
// both are a particular mailbox
if (email2.indexOf('@') != -1)
{
if (email1.equalsIgnoreCase(email2))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(_sub, email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a particular host
else
{
if (_sub.equalsIgnoreCase(email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
// email1 specifies a domain
else if (email1.startsWith("."))
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (withinDomain(_sub, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2)
|| email1.equalsIgnoreCase(email2))
{
union.add(email2);
}
else if (withinDomain(email2, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
else
{
if (withinDomain(email2, email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
// email specifies a host
else
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (_sub.equalsIgnoreCase(email1))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2))
{
union.add(email2);
}
else
{
union.add(email1);
union.add(email2);
}
}
// email2 specifies a particular host
else
{
if (email1.equalsIgnoreCase(email2))
{
union.add(email1);
}
else
{
union.add(email1);
union.add(email2);
}
}
}
}
private Set intersectDNS(Set permitted, Set dnss)
{
Set intersect = new HashSet();
for (Iterator it = dnss.iterator(); it.hasNext();)
{
String dns = extractNameAsString(((GeneralSubtree)it.next())
.getBase());
if (permitted == null)
{
if (dns != null)
{
intersect.add(dns);
}
}
else
{
Iterator _iter = permitted.iterator();
while (_iter.hasNext())
{
String _permitted = (String)_iter.next();
if (withinDomain(_permitted, dns))
{
intersect.add(_permitted);
}
else if (withinDomain(dns, _permitted))
{
intersect.add(dns);
}
}
}
}
return intersect;
}
protected Set unionDNS(Set excluded, String dns)
{
if (excluded.isEmpty())
{
if (dns == null)
{
return excluded;
}
excluded.add(dns);
return excluded;
}
else
{
Set union = new HashSet();
Iterator _iter = excluded.iterator();
while (_iter.hasNext())
{
String _permitted = (String)_iter.next();
if (withinDomain(_permitted, dns))
{
union.add(dns);
}
else if (withinDomain(dns, _permitted))
{
union.add(_permitted);
}
else
{
union.add(_permitted);
union.add(dns);
}
}
return union;
}
}
/**
* The most restricting part from email1 and
* email2 is added to the intersection intersect.
*
* @param email1 Email address constraint 1.
* @param email2 Email address constraint 2.
* @param intersect The intersection.
*/
private void intersectEmail(String email1, String email2, Set intersect)
{
// email1 is a particular address
if (email1.indexOf('@') != -1)
{
String _sub = email1.substring(email1.indexOf('@') + 1);
// both are a particular mailbox
if (email2.indexOf('@') != -1)
{
if (email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(_sub, email2))
{
intersect.add(email1);
}
}
// email2 specifies a particular host
else
{
if (_sub.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
}
// email specifies a domain
else if (email1.startsWith("."))
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (withinDomain(_sub, email1))
{
intersect.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2)
|| email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
else if (withinDomain(email2, email1))
{
intersect.add(email2);
}
}
else
{
if (withinDomain(email2, email1))
{
intersect.add(email2);
}
}
}
// email1 specifies a host
else
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email2.indexOf('@') + 1);
if (_sub.equalsIgnoreCase(email1))
{
intersect.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2))
{
intersect.add(email1);
}
}
// email2 specifies a particular host
else
{
if (email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
}
}
private void checkExcludedURI(Set excluded, String uri)
throws PKIXNameConstraintValidatorException
{
if (excluded.isEmpty())
{
return;
}
Iterator it = excluded.iterator();
while (it.hasNext())
{
String str = ((String)it.next());
if (isUriConstrained(uri, str))
{
throw new PKIXNameConstraintValidatorException(
"URI is from an excluded subtree.");
}
}
}
private Set intersectURI(Set permitted, Set uris)
{
Set intersect = new HashSet();
for (Iterator it = uris.iterator(); it.hasNext();)
{
String uri = extractNameAsString(((GeneralSubtree)it.next())
.getBase());
if (permitted == null)
{
if (uri != null)
{
intersect.add(uri);
}
}
else
{
Iterator _iter = permitted.iterator();
while (_iter.hasNext())
{
String _permitted = (String)_iter.next();
intersectURI(_permitted, uri, intersect);
}
}
}
return intersect;
}
private Set unionURI(Set excluded, String uri)
{
if (excluded.isEmpty())
{
if (uri == null)
{
return excluded;
}
excluded.add(uri);
return excluded;
}
else
{
Set union = new HashSet();
Iterator _iter = excluded.iterator();
while (_iter.hasNext())
{
String _excluded = (String)_iter.next();
unionURI(_excluded, uri, union);
}
return union;
}
}
private void intersectURI(String email1, String email2, Set intersect)
{
// email1 is a particular address
if (email1.indexOf('@') != -1)
{
String _sub = email1.substring(email1.indexOf('@') + 1);
// both are a particular mailbox
if (email2.indexOf('@') != -1)
{
if (email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(_sub, email2))
{
intersect.add(email1);
}
}
// email2 specifies a particular host
else
{
if (_sub.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
}
// email specifies a domain
else if (email1.startsWith("."))
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email1.indexOf('@') + 1);
if (withinDomain(_sub, email1))
{
intersect.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2)
|| email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
else if (withinDomain(email2, email1))
{
intersect.add(email2);
}
}
else
{
if (withinDomain(email2, email1))
{
intersect.add(email2);
}
}
}
// email1 specifies a host
else
{
if (email2.indexOf('@') != -1)
{
String _sub = email2.substring(email2.indexOf('@') + 1);
if (_sub.equalsIgnoreCase(email1))
{
intersect.add(email2);
}
}
// email2 specifies a domain
else if (email2.startsWith("."))
{
if (withinDomain(email1, email2))
{
intersect.add(email1);
}
}
// email2 specifies a particular host
else
{
if (email1.equalsIgnoreCase(email2))
{
intersect.add(email1);
}
}
}
}
private void checkPermittedURI(Set permitted, String uri)
throws PKIXNameConstraintValidatorException
{
if (permitted == null)
{
return;
}
Iterator it = permitted.iterator();
while (it.hasNext())
{
String str = ((String)it.next());
if (isUriConstrained(uri, str))
{
return;
}
}
if (uri.length() == 0 && permitted.size() == 0)
{
return;
}
throw new PKIXNameConstraintValidatorException(
"URI is not from a permitted subtree.");
}
private boolean isUriConstrained(String uri, String constraint)
{
String host = extractHostFromURL(uri);
// a host
if (!constraint.startsWith("."))
{
if (host.equalsIgnoreCase(constraint))
{
return true;
}
}
// in sub domain or domain
else if (withinDomain(host, constraint))
{
return true;
}
return false;
}
private static String extractHostFromURL(String url)
{
// see RFC 1738
// remove ':' after protocol, e.g. http:
String sub = url.substring(url.indexOf(':') + 1);
// extract host from Common Internet Scheme Syntax, e.g. http://
if (sub.indexOf("//") != -1)
{
sub = sub.substring(sub.indexOf("//") + 2);
}
// first remove port, e.g. http://test.com:21
if (sub.lastIndexOf(':') != -1)
{
sub = sub.substring(0, sub.lastIndexOf(':'));
}
// remove user and password, e.g. http://john:[email protected]
sub = sub.substring(sub.indexOf(':') + 1);
sub = sub.substring(sub.indexOf('@') + 1);
// remove local parts, e.g. http://test.com/bla
if (sub.indexOf('/') != -1)
{
sub = sub.substring(0, sub.indexOf('/'));
}
return sub;
}
/**
* Checks if the given GeneralName is in the permitted set.
*
* @param name The GeneralName
* @throws PKIXNameConstraintValidatorException
* If the name
*/
public void checkPermitted(GeneralName name)
throws PKIXNameConstraintValidatorException
{
switch (name.getTagNo())
{
case 1:
checkPermittedEmail(permittedSubtreesEmail,
extractNameAsString(name));
break;
case 2:
checkPermittedDNS(permittedSubtreesDNS, DERIA5String.getInstance(
name.getName()).getString());
break;
case 4:
checkPermittedDN(ASN1Sequence.getInstance(name.getName()
.getDERObject()));
break;
case 6:
checkPermittedURI(permittedSubtreesURI, DERIA5String.getInstance(
name.getName()).getString());
break;
case 7:
byte[] ip = ASN1OctetString.getInstance(name.getName()).getOctets();
checkPermittedIP(permittedSubtreesIP, ip);
}
}
/**
* Check if the given GeneralName is contained in the excluded set.
*
* @param name The GeneralName.
* @throws PKIXNameConstraintValidatorException
* If the name is
* excluded.
*/
public void checkExcluded(GeneralName name)
throws PKIXNameConstraintValidatorException
{
switch (name.getTagNo())
{
case 1:
checkExcludedEmail(excludedSubtreesEmail, extractNameAsString(name));
break;
case 2:
checkExcludedDNS(excludedSubtreesDNS, DERIA5String.getInstance(
name.getName()).getString());
break;
case 4:
checkExcludedDN(ASN1Sequence.getInstance(name.getName()
.getDERObject()));
break;
case 6:
checkExcludedURI(excludedSubtreesURI, DERIA5String.getInstance(
name.getName()).getString());
break;
case 7:
byte[] ip = ASN1OctetString.getInstance(name.getName()).getOctets();
checkExcludedIP(excludedSubtreesIP, ip);
}
}
/**
* Updates the permitted set of these name constraints with the intersection
* with the given subtree.
*
* @param permitted The permitted subtrees
*/
public void intersectPermittedSubtree(ASN1Sequence permitted)
{
Map subtreesMap = new HashMap();
// group in sets in a map ordered by tag no.
for (Enumeration e = permitted.getObjects(); e.hasMoreElements();)
{
GeneralSubtree subtree = GeneralSubtree.getInstance(e.nextElement());
Integer tagNo = new Integer(subtree.getBase().getTagNo());
if (subtreesMap.get(tagNo) == null)
{
subtreesMap.put(tagNo, new HashSet());
}
((Set)subtreesMap.get(tagNo)).add(subtree);
}
for (Iterator it = subtreesMap.entrySet().iterator(); it.hasNext();)
{
Map.Entry entry = (Map.Entry)it.next();
// go through all subtree groups
switch (((Integer)entry.getKey()).intValue())
{
case 1:
permittedSubtreesEmail = intersectEmail(permittedSubtreesEmail,
(Set)entry.getValue());
break;
case 2:
permittedSubtreesDNS = intersectDNS(permittedSubtreesDNS,
(Set)entry.getValue());
break;
case 4:
permittedSubtreesDN = intersectDN(permittedSubtreesDN,
(Set)entry.getValue());
break;
case 6:
permittedSubtreesURI = intersectURI(permittedSubtreesURI,
(Set)entry.getValue());
break;
case 7:
permittedSubtreesIP = intersectIP(permittedSubtreesIP,
(Set)entry.getValue());
}
}
}
private String extractNameAsString(GeneralName name)
{
return DERIA5String.getInstance(name.getName()).getString();
}
public void intersectEmptyPermittedSubtree(int nameType)
{
switch (nameType)
{
case 1:
permittedSubtreesEmail = new HashSet();
break;
case 2:
permittedSubtreesDNS = new HashSet();
break;
case 4:
permittedSubtreesDN = new HashSet();
break;
case 6:
permittedSubtreesURI = new HashSet();
break;
case 7:
permittedSubtreesIP = new HashSet();
}
}
/**
* Adds a subtree to the excluded set of these name constraints.
*
* @param subtree A subtree with an excluded GeneralName.
*/
public void addExcludedSubtree(GeneralSubtree subtree)
{
GeneralName base = subtree.getBase();
switch (base.getTagNo())
{
case 1:
excludedSubtreesEmail = unionEmail(excludedSubtreesEmail,
extractNameAsString(base));
break;
case 2:
excludedSubtreesDNS = unionDNS(excludedSubtreesDNS,
extractNameAsString(base));
break;
case 4:
excludedSubtreesDN = unionDN(excludedSubtreesDN,
(ASN1Sequence)base.getName().getDERObject());
break;
case 6:
excludedSubtreesURI = unionURI(excludedSubtreesURI,
extractNameAsString(base));
break;
case 7:
excludedSubtreesIP = unionIP(excludedSubtreesIP, ASN1OctetString
.getInstance(base.getName()).getOctets());
break;
}
}
/**
* Returns the maximum IP address.
*
* @param ip1 The first IP address.
* @param ip2 The second IP address.
* @return The maximum IP address.
*/
private static byte[] max(byte[] ip1, byte[] ip2)
{
for (int i = 0; i < ip1.length; i++)
{
if ((ip1[i] & 0xFFFF) > (ip2[i] & 0xFFFF))
{
return ip1;
}
}
return ip2;
}
/**
* Returns the minimum IP address.
*
* @param ip1 The first IP address.
* @param ip2 The second IP address.
* @return The minimum IP address.
*/
private static byte[] min(byte[] ip1, byte[] ip2)
{
for (int i = 0; i < ip1.length; i++)
{
if ((ip1[i] & 0xFFFF) < (ip2[i] & 0xFFFF))
{
return ip1;
}
}
return ip2;
}
/**
* Compares IP address ip1 with ip2. If ip1
* is equal to ip2 0 is returned. If ip1 is bigger 1 is returned, -1
* otherwise.
*
* @param ip1 The first IP address.
* @param ip2 The second IP address.
* @return 0 if ip1 is equal to ip2, 1 if ip1 is bigger, -1 otherwise.
*/
private static int compareTo(byte[] ip1, byte[] ip2)
{
if (Arrays.areEqual(ip1, ip2))
{
return 0;
}
if (Arrays.areEqual(max(ip1, ip2), ip1))
{
return 1;
}
return -1;
}
/**
* Returns the logical OR of the IP addresses ip1 and
* ip2.
*
* @param ip1 The first IP address.
* @param ip2 The second IP address.
* @return The OR of ip1 and ip2.
*/
private static byte[] or(byte[] ip1, byte[] ip2)
{
byte[] temp = new byte[ip1.length];
for (int i = 0; i < ip1.length; i++)
{
temp[i] = (byte)(ip1[i] | ip2[i]);
}
return temp;
}
public int hashCode()
{
return hashCollection(excludedSubtreesDN)
+ hashCollection(excludedSubtreesDNS)
+ hashCollection(excludedSubtreesEmail)
+ hashCollection(excludedSubtreesIP)
+ hashCollection(excludedSubtreesURI)
+ hashCollection(permittedSubtreesDN)
+ hashCollection(permittedSubtreesDNS)
+ hashCollection(permittedSubtreesEmail)
+ hashCollection(permittedSubtreesIP)
+ hashCollection(permittedSubtreesURI);
}
private int hashCollection(Collection coll)
{
if (coll == null)
{
return 0;
}
int hash = 0;
Iterator it1 = coll.iterator();
while (it1.hasNext())
{
Object o = it1.next();
if (o instanceof byte[])
{
hash += Arrays.hashCode((byte[])o);
}
else
{
hash += o.hashCode();
}
}
return hash;
}
public boolean equals(Object o)
{
if (!(o instanceof PKIXNameConstraintValidator))
{
return false;
}
PKIXNameConstraintValidator constraintValidator = (PKIXNameConstraintValidator)o;
return collectionsAreEqual(constraintValidator.excludedSubtreesDN, excludedSubtreesDN)
&& collectionsAreEqual(constraintValidator.excludedSubtreesDNS, excludedSubtreesDNS)
&& collectionsAreEqual(constraintValidator.excludedSubtreesEmail, excludedSubtreesEmail)
&& collectionsAreEqual(constraintValidator.excludedSubtreesIP, excludedSubtreesIP)
&& collectionsAreEqual(constraintValidator.excludedSubtreesURI, excludedSubtreesURI)
&& collectionsAreEqual(constraintValidator.permittedSubtreesDN, permittedSubtreesDN)
&& collectionsAreEqual(constraintValidator.permittedSubtreesDNS, permittedSubtreesDNS)
&& collectionsAreEqual(constraintValidator.permittedSubtreesEmail, permittedSubtreesEmail)
&& collectionsAreEqual(constraintValidator.permittedSubtreesIP, permittedSubtreesIP)
&& collectionsAreEqual(constraintValidator.permittedSubtreesURI, permittedSubtreesURI);
}
private boolean collectionsAreEqual(Collection coll1, Collection coll2)
{
if (coll1 == coll2)
{
return true;
}
if (coll1 == null || coll2 == null)
{
return false;
}
if (coll1.size() != coll2.size())
{
return false;
}
Iterator it1 = coll1.iterator();
while (it1.hasNext())
{
Object a = it1.next();
Iterator it2 = coll2.iterator();
boolean found = false;
while (it2.hasNext())
{
Object b = it2.next();
if (equals(a, b))
{
found = true;
break;
}
}
if (!found)
{
return false;
}
}
return true;
}
private boolean equals(Object o1, Object o2)
{
if (o1 == o2)
{
return true;
}
if (o1 == null || o2 == null)
{
return false;
}
if (o1 instanceof byte[] && o2 instanceof byte[])
{
return Arrays.areEqual((byte[])o1, (byte[])o2);
}
else
{
return o1.equals(o2);
}
}
/**
* Stringifies an IPv4 or v6 address with subnet mask.
*
* @param ip The IP with subnet mask.
* @return The stringified IP address.
*/
private String stringifyIP(byte[] ip)
{
String temp = "";
for (int i = 0; i < ip.length / 2; i++)
{
temp += Integer.toString(ip[i] & 0x00FF) + ".";
}
temp = temp.substring(0, temp.length() - 1);
temp += "/";
for (int i = ip.length / 2; i < ip.length; i++)
{
temp += Integer.toString(ip[i] & 0x00FF) + ".";
}
temp = temp.substring(0, temp.length() - 1);
return temp;
}
private String stringifyIPCollection(Set ips)
{
String temp = "";
temp += "[";
for (Iterator it = ips.iterator(); it.hasNext();)
{
temp += stringifyIP((byte[])it.next()) + ",";
}
if (temp.length() > 1)
{
temp = temp.substring(0, temp.length() - 1);
}
temp += "]";
return temp;
}
public String toString()
{
String temp = "";
temp += "permitted:\n";
if (permittedSubtreesDN != null)
{
temp += "DN:\n";
temp += permittedSubtreesDN.toString() + "\n";
}
if (permittedSubtreesDNS != null)
{
temp += "DNS:\n";
temp += permittedSubtreesDNS.toString() + "\n";
}
if (permittedSubtreesEmail != null)
{
temp += "Email:\n";
temp += permittedSubtreesEmail.toString() + "\n";
}
if (permittedSubtreesURI != null)
{
temp += "URI:\n";
temp += permittedSubtreesURI.toString() + "\n";
}
if (permittedSubtreesIP != null)
{
temp += "IP:\n";
temp += stringifyIPCollection(permittedSubtreesIP) + "\n";
}
temp += "excluded:\n";
if (!excludedSubtreesDN.isEmpty())
{
temp += "DN:\n";
temp += excludedSubtreesDN.toString() + "\n";
}
if (!excludedSubtreesDNS.isEmpty())
{
temp += "DNS:\n";
temp += excludedSubtreesDNS.toString() + "\n";
}
if (!excludedSubtreesEmail.isEmpty())
{
temp += "Email:\n";
temp += excludedSubtreesEmail.toString() + "\n";
}
if (!excludedSubtreesURI.isEmpty())
{
temp += "URI:\n";
temp += excludedSubtreesURI.toString() + "\n";
}
if (!excludedSubtreesIP.isEmpty())
{
temp += "IP:\n";
temp += stringifyIPCollection(excludedSubtreesIP) + "\n";
}
return temp;
}
}