Module jcifs
Package org.codelibs.jcifs.smb1.util

Class DES

java.lang.Object
org.codelibs.jcifs.smb1.util.DES
public class DES extends Object
This code is derived from the above source JCIFS API Norbert Hranitzky

and modified again by Michael B. Allen

  • Constructor Summary

    Constructors
    Constructor
    Description
    DES()
    Creates a DES cipher instance without a key
    DES(byte[] key)
    Creates a DES cipher instance with the specified key

  • Method Summary

    Modifier and Type
    Method
    Description
    byte[]
    decrypt(byte[] cipherText)
    Decrypts an 8-byte block using DES
    void
    decrypt(byte[] cipherText, byte[] clearText)
    Decrypts an 8-byte block using DES
    byte[]
    encrypt(byte[] clearText)
    Encrypts an 8-byte block using DES
    void
    encrypt(byte[] clearText, byte[] cipherText)
    Encrypts an 8-byte block using DES
    static void
    makeSMBKey(byte[] key7, byte[] key8)
    Converts a 7-byte SMB key to an 8-byte DES key with parity bits
    void
    setKey(byte[] key)
    Sets the DES encryption key
    static void
    spreadIntsToBytes(int[] inInts, int inOff, byte[] outBytes, int outOff, int intLen)
    Converts integers to bytes after internal DES processing
    static void
    squashBytesToInts(byte[] inBytes, int inOff, int[] outInts, int outOff, int intLen)
    Converts bytes to integers for internal DES processing

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • DES

      public DES()
      Creates a DES cipher instance without a key

    • DES

      public DES(byte[] key)
      Creates a DES cipher instance with the specified key
      Parameters:
      key - the DES key (7 or 8 bytes)

  • Method Details

    • makeSMBKey

      public static void makeSMBKey(byte[] key7, byte[] key8)
      Converts a 7-byte SMB key to an 8-byte DES key with parity bits
      Parameters:
      key7 - the 7-byte SMB key
      key8 - the output 8-byte DES key

    • setKey

      public void setKey(byte[] key)
      Sets the DES encryption key
      Parameters:
      key - the 8-byte DES key

    • encrypt

      public void encrypt(byte[] clearText, byte[] cipherText)
      Encrypts an 8-byte block using DES
      Parameters:
      clearText - the 8-byte plaintext block
      cipherText - the output 8-byte ciphertext block

    • decrypt

      public void decrypt(byte[] cipherText, byte[] clearText)
      Decrypts an 8-byte block using DES
      Parameters:
      cipherText - the 8-byte ciphertext block
      clearText - the output 8-byte plaintext block

    • encrypt

      public byte[] encrypt(byte[] clearText)
      Encrypts an 8-byte block using DES
      Parameters:
      clearText - the 8-byte plaintext block
      Returns:
      the 8-byte ciphertext block

    • decrypt

      public byte[] decrypt(byte[] cipherText)
      Decrypts an 8-byte block using DES
      Parameters:
      cipherText - the 8-byte ciphertext block
      Returns:
      the 8-byte plaintext block

    • squashBytesToInts

      public static void squashBytesToInts(byte[] inBytes, int inOff, int[] outInts, int outOff, int intLen)
      Converts bytes to integers for internal DES processing
      Parameters:
      inBytes - the input byte array
      inOff - the offset into the input array
      outInts - the output integer array
      outOff - the offset into the output array
      intLen - the number of integers to convert

    • spreadIntsToBytes

      public static void spreadIntsToBytes(int[] inInts, int inOff, byte[] outBytes, int outOff, int intLen)
      Converts integers to bytes after internal DES processing
      Parameters:
      inInts - the input integer array
      inOff - the offset into the input array
      outBytes - the output byte array
      outOff - the offset into the output array
      intLen - the number of integers to convert