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Added in API level 1

Summary: Ctors | Methods | Inherited Methods | [Expand All]

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

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this 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.