javax.crypto.spec
Class RC2ParameterSpec
- java.lang.Object
javax.crypto.spec.RC2ParameterSpec
All implemented interfaces:
java.security.spec.AlgorithmParameterSpec
- public class RC2ParameterSpec
- extends java.lang.Object
- implements java.security.spec.AlgorithmParameterSpec
The parameters consist of an effective key size and optionally an 8-byte initialization vector (IV) (only in feedback mode).
This class can be used to initialize a Cipher
object that
implements the RC2 algorithm.
Since:
1.4
Version:
1.13, 06/03/04
Author:
Jan Luehe
Constructor Summary
Constructor and Description |
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RC2ParameterSpec(int effectiveKeyBits)
Constructs a parameter set for RC2 from the given effective key size
(in bits).
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RC2ParameterSpec(int effectiveKeyBits,byte[] iv)
Constructs a parameter set for RC2 from the given effective key size
(in bits) and an 8-byte IV.
|
RC2ParameterSpec(int effectiveKeyBits,byte[] iv,int offset)
Constructs a parameter set for RC2 from the given effective key size
(in bits) and IV.
|
Method Summary
Modifier and Type | Method and Description |
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|
equals(java.lang.Object obj)
Tests for equality between the specified object and this
object.
|
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getEffectiveKeyBits()
Returns the effective key size in bits.
|
|
getIV()
Returns the IV or null if this parameter set does not contain an IV.
|
|
hashCode()
Calculates a hash code value for the object.
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Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail
RC2ParameterSpec
- public RC2ParameterSpec(int effectiveKeyBits)
Constructs a parameter set for RC2 from the given effective key size
(in bits).
Parameters:
effectiveKeyBits
- the effective key size in bits. RC2ParameterSpec
- public RC2ParameterSpec(int effectiveKeyBits,
- byte[] iv)
Constructs a parameter set for RC2 from the given effective key size
(in bits) and an 8-byte IV.
The bytes that constitute the IV are those between
iv[0]
and iv[7]
inclusive.
Parameters:
effectiveKeyBits
- the effective key size in bits. iv
- the buffer with the 8-byte IV. The first 8 bytes of
the buffer are copied to protect against subsequent modification. Throws:
java.lang.IllegalArgumentException
- if iv
is null. RC2ParameterSpec
- public RC2ParameterSpec(int effectiveKeyBits,
- byte[] iv,
- int offset)
Constructs a parameter set for RC2 from the given effective key size
(in bits) and IV.
The IV is taken from iv
, starting at
offset
inclusive.
The bytes that constitute the IV are those between
iv[offset]
and iv[offset+7]
inclusive.
Parameters:
effectiveKeyBits
- the effective key size in bits. iv
- the buffer with the IV. The first 8 bytes
of the buffer beginning at offset
inclusive
are copied to protect against subsequent modification. offset
- the offset in iv
where the 8-byte IV
starts. Throws:
java.lang.IllegalArgumentException
- if iv
is null. Method Detail
getEffectiveKeyBits
- public int getEffectiveKeyBits( )
Returns the effective key size in bits.
Returns:
the effective key size in bits.
getIV
- public byte[] getIV()
Returns the IV or null if this parameter set does not contain an IV.
Returns:
the IV or null if this parameter set does not contain an IV.
Returns a new array each time this method is called.
equals
- public boolean equals(java.lang.Object obj)
Tests for equality between the specified object and this
object. Two RC2ParameterSpec objects are considered equal if their
effective key sizes and IVs are equal.
(Two IV references are considered equal if both are
null
.)
Overrides:
equals
in class java.lang.Object
Parameters:
obj
- the object to test for equality with this object. Returns:
true if the objects are considered equal, false if
obj
is null or otherwise. hashCode
- public int hashCode()
Calculates a hash code value for the object.
Objects that are equal will also have the same hashcode.
Overrides:
hashCode
in class java.lang.Object