Java compact1, compact2, compact3 javax.crypto.spec Class RC2ParameterSpec（JDK8）

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:

  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:

  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(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 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.

  See Also:

  Object.hashCode(), HashMap

• 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 Object

  Returns:

  a hash code value for this object.

  See Also:

  Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)