Package eu.emi.security.authn.x509.helpers.proxy

Class IPAddressHelper

java.lang.Object
eu.emi.security.authn.x509.helpers.proxy.IPAddressHelper
public class IPAddressHelper extends Object
Helpers for IP addresses comparison. Mostly the code from Tigran's ipmatcher library (GNU license).

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final int
    IPv4_FULL_MASK
     
    private static final int
    IPv6_FULL_MASK
     
    private static final int
    IPv6_HALF_MASK
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    IPAddressHelper()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    private static int
    getCidrNetmask(int size, byte[] netmask, int offset)
     
    private static int
    getInt(byte[] bytes, int offset)
    Returns the big-endian int value whose byte representation is the 4 bytes of bytes staring offset.
    private static long
    getLong(byte[] bytes, int offset)
    Returns the big-endian long value whose byte representation is the 8 bytes of bytes staring offset.
    static boolean
    isWithinAddressSpace(byte[] ipBytes, byte[] ipAddressWithNetmask)
    Tests whether the ipAddress is within the address space defined by the ipAddressWithNetmask.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

    • IPAddressHelper

      public IPAddressHelper()

  • Method Details

    • isWithinAddressSpace

      public static boolean isWithinAddressSpace(byte[] ipBytes, byte[] ipAddressWithNetmask)
      Tests whether the ipAddress is within the address space defined by the ipAddressWithNetmask.
      Parameters:
      ipBytes - The IP address bytes to compare against the address space.
      ipAddressWithNetmask - The 8 (IPv4) or 32 (IPv6) byte array containing in the first half the base IP address bytes and in the second half the netmask bytes.
      Returns:
      true if ip matches subnet.

    • getLong

      private static long getLong(byte[] bytes, int offset)
      Returns the big-endian long value whose byte representation is the 8 bytes of bytes staring offset.
      Parameters:
      bytes -
      offset -
      Returns:
      long value

    • getInt

      private static int getInt(byte[] bytes, int offset)
      Returns the big-endian int value whose byte representation is the 4 bytes of bytes staring offset.
      Parameters:
      bytes -
      offset -
      Returns:
      int value

    • getCidrNetmask

      private static int getCidrNetmask(int size, byte[] netmask, int offset)