AlgorithmParameterSpec
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 LLC, or any parties authorized by RSA Security.
Constructor | Description |
---|---|
RC5ParameterSpec |
Constructs a parameter set for RC5 from the given version, number of rounds and word size (in bits). |
RC5ParameterSpec |
Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV. |
RC5ParameterSpec |
Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV. |
Modifier and Type | Method | Description |
---|---|---|
boolean |
equals |
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
.)public int hashCode()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/javax/crypto/spec/RC5ParameterSpec.html