public class RC5ParameterSpec extends Object implements AlgorithmParameterSpec
This class specifies the parameters used with the RC5 algorithm.
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.
public 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).
version - the version.rounds - the number of rounds.wordSize - the word size in bits.public 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.
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) Constructs a parameter set for RC5 from the given version, number of rounds, word size (in bits), and IV.
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()
Returns the version.
public int getRounds()
Returns the number of rounds.
public int getWordSize()
Returns the word size in bits.
public byte[] getIV()
Returns the IV or null if this parameter set does not contain an IV.
public boolean equals(Object obj)
Tests for equality between the specified object and this object. Two RC5ParameterSpec objects are considered equal if their version numbers, number of rounds, word sizes, and IVs are equal. (Two IV references are considered equal if both are 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()
Calculates a hash code value for the object. Objects that are equal will also have the same hashcode.
hashCode in class Object
Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)
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