javax.crypto.spec
Class RC5ParameterSpec

java.lang.Object
  |
  +--javax.crypto.spec.RC5ParameterSpec

public class RC5ParameterSpec
extends java.lang.Object
implements java.security.spec.AlgorithmParameterSpec

This class specifies the parameters used with the RC5 algorithm.

The parameters consist of a version number, a rounds count, a word size, and optionally an initialisation vector (IV) (only in feedback mode).

This class can be used to initialise a Cipher object that implements the RC5 algorithm as supplied by RSA Data Security, Inc., or parties authorised by RSA Data Security.


Constructor Summary
RC5ParameterSpec(int version, int rounds, int wordSize)
          Constructs a parameter set for RC5 from the given version, number of rounds and word size (in bits).
RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv)
          Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV.
RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv, int offset)
          Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV.
 
Method Summary
 byte[] getIV()
          Returns the IV or null if this parameter set does not contain an IV.
 int getRounds()
          Returns the number of rounds.
 int getVersion()
          Returns the version.
 int getWordSize()
          Returns the word size in bits.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RC5ParameterSpec

public RC5ParameterSpec(int version,
                        int rounds,
                        int wordSize)
Constructs a parameter set for RC5 from the given version, number of rounds and word size (in bits).
Parameters:
version - the version.
rounds - the number of rounds.
wordSize - the word size in bits.

RC5ParameterSpec

public RC5ParameterSpec(int version,
                        int rounds,
                        int wordSize,
                        byte[] iv)
Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV. Note that the size of the IV (block size) must be twice the word size.
Parameters:
version - the version.
rounds - the number of rounds.
wordSize - the word size in bits.
iv - the buffer with the IV.

RC5ParameterSpec

public RC5ParameterSpec(int version,
                        int rounds,
                        int wordSize,
                        byte[] iv,
                        int offset)
Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV. The IV is taken from iv, starting at offset. Note that the size of the IV (block size), starting at offset, must be twice the word size.
Parameters:
version - the version.
rounds - the number of rounds.
wordSize - the word size in bits.
iv - the buffer with the IV.
offset - the offset in iv where the IV starts.
Method Detail

getVersion

public int getVersion()
Returns the version.
Returns:
the version.

getRounds

public int getRounds()
Returns the number of rounds.
Returns:
the number of rounds.

getWordSize

public int getWordSize()
Returns the word size in bits.
Returns:
the word size in bits.

getIV

public byte[] getIV()
Returns the IV or null if this parameter set does not contain an IV.
Returns:
the IV or null if this parameter set does not contain an IV.