RC2ParameterSpec (Java SE 11 & JDK 11 ) (original) (raw)

• java.lang.Object

• • javax.crypto.spec.RC2ParameterSpec

• All Implemented Interfaces:
  [AlgorithmParameterSpec](../../../java/security/spec/AlgorithmParameterSpec.html "interface in java.security.spec")

public class RC2ParameterSpec
extends Object
implements AlgorithmParameterSpec
This class specifies the parameters used with theRC2 algorithm.
The parameters consist of an effective key size and optionally an 8-byte initialization vector (IV) (only in feedback mode).
This class can be used to initialize a Cipher object that implements the RC2 algorithm.
Since:
1.4

• • Constructor Summary

  Constructors

  Constructor	Description
  RC2ParameterSpec​(int effectiveKeyBits)	Constructs a parameter set for RC2 from the given effective key size (in bits).
  RC2ParameterSpec​(int effectiveKeyBits, byte[] iv)	Constructs a parameter set for RC2 from the given effective key size (in bits) and an 8-byte IV.
  RC2ParameterSpec​(int effectiveKeyBits, byte[] iv, int offset)	Constructs a parameter set for RC2 from the given effective key size (in bits) and IV.

  • Method Summary

  All Methods Instance Methods Concrete Methods

  Modifier and Type	Method	Description
  boolean	equals​(Object obj)	Tests for equality between the specified object and this object.
  int	getEffectiveKeyBits()	Returns the effective key size in bits.
  byte[]	getIV()	Returns the IV or null if this parameter set does not contain an IV.
  int	hashCode()	Calculates a hash code value for the object.

     * ### Methods declared in class java.lang.[Object](../../../java/lang/Object.html "class in java.lang")  
     `[clone](../../../java/lang/Object.html#clone%28%29), [finalize](../../../java/lang/Object.html#finalize%28%29), [getClass](../../../java/lang/Object.html#getClass%28%29), [notify](../../../java/lang/Object.html#notify%28%29), [notifyAll](../../../java/lang/Object.html#notifyAll%28%29), [toString](../../../java/lang/Object.html#toString%28%29), [wait](../../../java/lang/Object.html#wait%28%29), [wait](../../../java/lang/Object.html#wait%28long%29), [wait](../../../java/lang/Object.html#wait%28long,int%29)`

• • Constructor Detail

     * #### RC2ParameterSpec  
     public RC2ParameterSpec​(int effectiveKeyBits)  
     Constructs a parameter set for RC2 from the given effective key size (in bits).  
     Parameters:  
     `effectiveKeyBits` \- the effective key size in bits.  
     * #### RC2ParameterSpec  
     public RC2ParameterSpec​(int effectiveKeyBits,  
                             byte[] iv)  
     Constructs a parameter set for RC2 from the given effective key size (in bits) and an 8-byte IV.  
      The bytes that constitute the IV are those between`iv[0]` and `iv[7]` inclusive.  
     Parameters:  
     `effectiveKeyBits` \- the effective key size in bits.  
     `iv` \- the buffer with the 8-byte IV. The first 8 bytes of the buffer are copied to protect against subsequent modification.  
     Throws:  
     `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `iv` is null.  
     * #### RC2ParameterSpec  
     public RC2ParameterSpec​(int effectiveKeyBits,  
                             byte[] iv,  
                             int offset)  
     Constructs a parameter set for RC2 from the given effective key size (in bits) and IV.  
      The IV is taken from `iv`, starting at`offset` inclusive. The bytes that constitute the IV are those between`iv[offset]` and `iv[offset+7]` inclusive.  
     Parameters:  
     `effectiveKeyBits` \- the effective key size in bits.  
     `iv` \- the buffer with the IV. The first 8 bytes of the buffer beginning at `offset` inclusive are copied to protect against subsequent modification.  
     `offset` \- the offset in `iv` where the 8-byte IV starts.  
     Throws:  
     `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `iv` is null.  

  • Method Detail

    * #### getEffectiveKeyBits  
    public int getEffectiveKeyBits()  
    Returns the effective key size in bits.  
    Returns:  
    the effective key 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. Returns a new array each time this method is called.  
    * #### equals  
    public boolean equals​([Object](../../../java/lang/Object.html "class in java.lang") obj)  
    Tests for equality between the specified object and this object. Two RC2ParameterSpec objects are considered equal if their effective key sizes and IVs are equal. (Two IV references are considered equal if both are `null`.)  
    Overrides:  
    `[equals](../../../java/lang/Object.html#equals%28java.lang.Object%29)` in class `[Object](../../../java/lang/Object.html "class in java.lang")`  
    Parameters:  
    `obj` \- the object to test for equality with this object.  
    Returns:  
    true if the objects are considered equal, false if`obj` is null or otherwise.  
    See Also:  
    [Object.hashCode()](../../../java/lang/Object.html#hashCode%28%29), [HashMap](../../../java/util/HashMap.html "class in java.util")  
    * #### hashCode  
    public int hashCode()  
    Calculates a hash code value for the object. Objects that are equal will also have the same hashcode.  
    Overrides:  
    `[hashCode](../../../java/lang/Object.html#hashCode%28%29)` in class `[Object](../../../java/lang/Object.html "class in java.lang")`  
    Returns:  
    a hash code value for this object.  
    See Also:  
    [Object.equals(java.lang.Object)](../../../java/lang/Object.html#equals%28java.lang.Object%29), [System.identityHashCode(java.lang.Object)](../../../java/lang/System.html#identityHashCode%28java.lang.Object%29)

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