Package javax.crypto.spec

Class SecretKeySpec

java.lang.Object

javax.crypto.spec.SecretKeySpec

All Implemented Interfaces:

Serializable, Key, KeySpec, SecretKey

public class SecretKeySpec
extends Object
implements SecretKey, KeySpec, Serializable

A key specification for a SecretKey and also a secret key implementation that is provider-independent. It can be used for raw secret keys that can be specified as byte[].

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
SecretKeySpec(byte[] key, int offset, int len, String algorithm)	Creates a new SecretKeySpec for the key data from the specified buffer key starting at offset with length len and the specified algorithm name.
SecretKeySpec(byte[] key, String algorithm)	Creates a new SecretKeySpec for the specified key data and algorithm name.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Compares the specified object with this SecretKeySpec instance.
String	getAlgorithm()	Returns the algorithm name.
byte[]	getEncoded()	Returns the encoded form of this secret key.
String	getFormat()	Returns the name of the format used to encode the key.
int	hashCode()	Returns the hash code of this SecretKeySpec object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SecretKeySpec

public SecretKeySpec(byte[] key,
                     String algorithm)

Creates a new SecretKeySpec for the specified key data and algorithm name.

Parameters:

key - the key data.

algorithm - the algorithm name.

Throws:

IllegalArgumentException - if the key data or the algorithm name is null or if the key data is empty.

SecretKeySpec

public SecretKeySpec(byte[] key,
                     int offset,
                     int len,
                     String algorithm)

Creates a new SecretKeySpec for the key data from the specified buffer key starting at offset with length len and the specified algorithm name.

Parameters:

key - the key data.

offset - the offset.

len - the size of the key data.

algorithm - the algorithm name.

Throws:

IllegalArgumentException - if the key data or the algorithm name is null, the key data is empty or offset and len do not specify a valid chunk in the buffer key.

ArrayIndexOutOfBoundsException - if offset or len is negative.

Method Detail

getAlgorithm

public String getAlgorithm()

Returns the algorithm name.

Specified by:

getAlgorithm in interface Key

Returns:

the algorithm name.

getFormat

public String getFormat()

Returns the name of the format used to encode the key.

Specified by:

getFormat in interface Key

Returns:

the format name "RAW".

getEncoded

public byte[] getEncoded()

Returns the encoded form of this secret key.

Specified by:

getEncoded in interface Key

Returns:

the encoded form of this secret key.

hashCode

public int hashCode()

Returns the hash code of this SecretKeySpec object.

Overrides:

hashCode in class Object

Returns:

the hash code.

See Also:

Object.equals(java.lang.Object)

equals

public boolean equals(Object obj)

Compares the specified object with this SecretKeySpec instance.

Overrides:

equals in class Object

Parameters:

obj - the object to compare.

Returns:

true if the algorithm name and key of both object are equal, otherwise false.

See Also:

Object.hashCode()