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
Constructor | Description |
---|---|
IvParameterSpec(byte[] iv) | Creates an IvParameterSpec object using the bytes in |
IvParameterSpec(byte[] iv,
int offset,
int len) | Creates an IvParameterSpec object using the first |
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 Detail
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
- ifiv
isnull
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 firstlen
bytes of the buffer beginning atoffset
inclusive are copied to protect against subsequent modification. -
offset
- the offset iniv
where the IV starts. -
len
- the number of IV bytes. - Throws:
-
IllegalArgumentException
- ifiv
isnull
or(iv.length - offset < len)
-
ArrayIndexOutOfBoundsException
- is thrown ifoffset
orlen
index bytes outside theiv
.
Method Detail
getIV
public byte[] getIV()
Returns the initialization vector (IV).
- Returns:
- the initialization vector (IV). Returns a new array each time this method is called.