Module java.base
Package javax.crypto.spec

Class IvParameterSpec

java.lang.Object
javax.crypto.spec.IvParameterSpec
All Implemented Interfaces:
AlgorithmParameterSpec
public class IvParameterSpec
extends Object
implements AlgorithmParameterSpec
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.
Since:
1.4

  • Constructor Summary

    Constructors 
    Constructor Description
    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.

  • Method Summary

    Modifier and Type Method Description
    byte[] getIV()
    Returns the initialization vector (IV).

    Methods declared in class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • IvParameterSpec

      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

    • IvParameterSpec

      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.

  • Method Details

    • getIV

      public byte[] getIV()
      Returns the initialization vector (IV).
      Returns:
      the initialization vector (IV). Returns a new array each time this method is called.