public class RC5ParameterSpec extends Object implements AlgorithmParameterSpec
The parameters consist of a version number, a rounds count, a word size, and optionally an initialization vector (IV) (only in feedback mode).
This class can be used to initialize a Cipher
object that
implements the RC5 algorithm as supplied by
RSA Security Inc.,
or any parties authorized by RSA Security.
Constructor and Description |
---|
RC5ParameterSpec(int version,
int rounds,
int wordSize)
Constructs a parameter set for RC5 from the given version, number of
rounds and word size (in bits).
|
RC5ParameterSpec(int version,
int rounds,
int wordSize,
byte[] iv)
Constructs a parameter set for RC5 from the given version, number of
rounds, word size (in bits), and IV.
|
RC5ParameterSpec(int version,
int rounds,
int wordSize,
byte[] iv,
int offset)
Constructs a parameter set for RC5 from the given version, number of
rounds, word size (in bits), and IV.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object obj)
Tests for equality between the specified object and this
object.
|
byte[] |
getIV()
Returns the IV or null if this parameter set does not contain an IV.
|
int |
getRounds()
Returns the number of rounds.
|
int |
getVersion()
Returns the version.
|
int |
getWordSize()
Returns the word size in bits.
|
int |
hashCode()
Calculates a hash code value for the object.
|
public RC5ParameterSpec(int version, int rounds, int wordSize)
version
- the version.rounds
- the number of rounds.wordSize
- the word size in bits.public RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv)
Note that the size of the IV (block size) must be twice the word
size. The bytes that constitute the IV are those between
iv[0]
and iv[2*(wordSize/8)-1]
inclusive.
version
- the version.rounds
- the number of rounds.wordSize
- the word size in bits.iv
- the buffer with the IV. The first 2*(wordSize/8)
bytes of the buffer are copied to protect against subsequent
modification.IllegalArgumentException
- if iv
is
null
or (iv.length < 2 * (wordSize / 8))
public RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv, int offset)
The IV is taken from iv
, starting at
offset
inclusive.
Note that the size of the IV (block size), starting at
offset
inclusive, must be twice the word size.
The bytes that constitute the IV are those between
iv[offset]
and iv[offset+2*(wordSize/8)-1]
inclusive.
version
- the version.rounds
- the number of rounds.wordSize
- the word size in bits.iv
- the buffer with the IV. The first 2*(wordSize/8)
bytes of the buffer beginning at offset
inclusive are copied to protect against subsequent modification.offset
- the offset in iv
where the IV starts.IllegalArgumentException
- if iv
is
null
or
(iv.length - offset < 2 * (wordSize / 8))
public int getVersion()
public int getRounds()
public int getWordSize()
public byte[] getIV()
public boolean equals(Object obj)
null
.)equals
in class Object
obj
- the object to test for equality with this object.obj
is null or otherwise.Object.hashCode()
,
HashMap
public int hashCode()
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2021, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.