public class

IvParameterSpec

extends Object
implements AlgorithmParameterSpec
java.lang.Object
   ↳ javax.crypto.spec.IvParameterSpec

Class Overview

This class specifies an initialization vector (IV). Examples which use IVs are ciphers in feedback mode, e.g., DES in CBC mode and RSA ciphers with OAEP encoding operation.

Summary

Public Constructors
IvParameterSpec(byte[] iv)
Creates an IvParameterSpec object using the bytes in iv as the IV.
IvParameterSpec(byte[] iv, int offset, int len)
Creates an IvParameterSpec object using the first len bytes in iv, beginning at offset inclusive, as the IV.
Public Methods
byte[] getIV()
Returns the initialization vector (IV).
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public IvParameterSpec (byte[] iv)

Creates an IvParameterSpec object using the bytes in iv as the IV.

Parameters
iv the buffer with the IV. The contents of the buffer are copied to protect against subsequent modification.
Throws
NullPointerException if iv is null

public IvParameterSpec (byte[] iv, int offset, int len)

Creates an IvParameterSpec object using the first len bytes in iv, beginning at offset inclusive, as the IV.

The bytes that constitute the IV are those between iv[offset] and iv[offset+len-1] inclusive.

Parameters
iv the buffer with the IV. The first len bytes of the buffer beginning at offset inclusive are copied to protect against subsequent modification.
offset the offset in iv where the IV starts.
len the number of IV bytes.
Throws
IllegalArgumentException if iv is null or (iv.length - offset < len)
ArrayIndexOutOfBoundsException is thrown if offset or len index bytes outside the iv.

Public Methods

public byte[] getIV ()

Returns the initialization vector (IV).

Returns
  • the initialization vector (IV). Returns a new array each time this method is called.