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RC5ParameterSpec

public class RC5ParameterSpec
extends Object implements AlgorithmParameterSpec

java.lang.Object
   ↳ javax.crypto.spec.RC5ParameterSpec


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 initialization vector (IV) (only in feedback mode).

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

Summary

Public constructors

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.

Public methods

boolean equals(Object obj)

Tests for equality between the specified object and this object.

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.

int hashCode()

Calculates a hash code value for the object.

Inherited methods

From class java.lang.Object

Public constructors

RC5ParameterSpec

Added in API level 1
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 int: the version.
rounds int: the number of rounds.
wordSize int: the word size in bits.

RC5ParameterSpec

Added in API level 1
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. The bytes that constitute the IV are those between iv[0] and iv[2*(wordSize/8)-1] inclusive.

Parameters
version int: the version.
rounds int: the number of rounds.
wordSize int: the word size in bits.
iv byte: the buffer with the IV. The first 2*(wordSize/8) bytes of the buffer are copied to protect against subsequent modification.
Throws
IllegalArgumentException if iv is null or (iv.length < 2 * (wordSize / 8))

RC5ParameterSpec

Added in API level 1
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 inclusive. Note that the size of the IV (block size), starting at offset inclusive, must be twice the word size. The bytes that constitute the IV are those between iv[offset] and iv[offset+2*(wordSize/8)-1] inclusive.

Parameters
version int: the version.
rounds int: the number of rounds.
wordSize int: the word size in bits.
iv byte: the buffer with the IV. The first 2*(wordSize/8) bytes of the buffer beginning at offset inclusive are copied to protect against subsequent modification.
offset int: the offset in iv where the IV starts.
Throws
IllegalArgumentException if iv is null or (iv.length - offset < 2 * (wordSize / 8))

Public methods

equals

Added in API level 1
boolean equals (Object obj)

Tests for equality between the specified object and this object. Two RC5ParameterSpec objects are considered equal if their version numbers, number of rounds, word sizes, and IVs are equal. (Two IV references are considered equal if both are null.)

Parameters
obj Object: the object to test for equality with this object.
Returns
boolean true if the objects are considered equal, false if obj is null or otherwise.

getIV

Added in API level 1
byte[] getIV ()

Returns the IV or null if this parameter set does not contain an IV.

Returns
byte[] the IV or null if this parameter set does not contain an IV. Returns a new array each time this method is called.

getRounds

Added in API level 1
int getRounds ()

Returns the number of rounds.

Returns
int the number of rounds.

getVersion

Added in API level 1
int getVersion ()

Returns the version.

Returns
int the version.

getWordSize

Added in API level 1
int getWordSize ()

Returns the word size in bits.

Returns
int the word size in bits.

hashCode

Added in API level 1
int hashCode ()

Calculates a hash code value for the object. Objects that are equal will also have the same hashcode.

Returns
int a hash code value for this object.
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