程序包 javax.crypto.spec

类 IvParameterSpec

java.lang.Object

javax.crypto.spec.IvParameterSpec

所有已实现的接口:

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.

从以下版本开始:

1.4

构造器概要

构造器

构造器	说明
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.

方法概要

限定符和类型	方法	说明
byte[]	getIV()	Returns the initialization vector (IV).

从类继承的方法 java.lang.Object

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

构造器详细资料

IvParameterSpec

public IvParameterSpec(byte[] iv)

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

参数:

iv - the buffer with the IV. The contents of the buffer are copied to protect against subsequent modification.

抛出:

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.

参数:

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.

抛出:

IllegalArgumentException - if iv is null or (iv.length - offset < len)

ArrayIndexOutOfBoundsException - is thrown if offset or len index bytes outside the iv.

方法详细资料

getIV

public byte[] getIV()

Returns the initialization vector (IV).

返回:

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