net.rim.device.api.crypto.CAST128Key
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java.lang.Object
public final class CAST128Key
Represents a CAST128 key.
The CAST algorithm was designed by Carlisle Adams and Stafford Tavares.
This version of CAST has a 128 bit key and a 64 bit block size.
This cipher is available worldwide on a royalty-free basis for commercial and non-commercial use.
For more information please refer to RFC 2144. For information on cryptographic algorithms, see Crypto Algorithms.
| Field Summary | ||
|---|---|---|
|
static int |
LENGTH
The size of the key represented in bytes, ie 16 bytes. |
| Constructor Summary | ||
|---|---|---|
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CAST128Key()
Creates a new CAST128Key populating the key data with random information. |
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CAST128Key(byte[] data)
Creates a new CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in. |
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CAST128Key(byte[] data,
int offset)
Creates a new CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in. |
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CAST128Key(CAST128CryptoToken cryptoToken,
byte[] data,
int offset)
Creates a new CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in. |
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CAST128Key(CAST128CryptoToken cryptoToken,
CryptoTokenSymmetricKeyData cryptoTokenData)
Creates a new CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in. |
|
| Method Summary | ||
|---|---|---|
|
boolean |
equals(Object obj)
Indicates whether some other object is "equal to" this one. |
|
String |
getAlgorithm()
Returns a string containing the name of the algorithm associated with this key ("CAST128"). |
|
int |
getBitLength()
Returns the number of bits that make up the actual keying material ( for example parity bits are not counted ). |
|
CAST128CryptoToken |
getCAST128CryptoToken()
Returns the crypto token. |
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CryptoTokenSymmetricKeyData |
getCryptoTokenData()
Returns the crypto token data. |
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byte[] |
getData()
Returns a copy of the byte array representing the key. |
|
int |
getLength()
Returns the length of the key in bytes. |
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SymmetricCryptoToken |
getSymmetricCryptoToken()
Returns the crypto token associated with this key. |
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int |
hashCode()
Returns a hash code value for the object. |
| Methods inherited from class java.lang.Object |
|---|
getClass, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final int LENGTH
| Constructor Detail |
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public CAST128Key()
CAST128Key populating the key data with random information.
public CAST128Key(byte[] data)
CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in.
data - the data to be used for the key data of this key.
public CAST128Key(byte[] data,
int offset)
CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in.
data - the data to be used for the key data of this key.offset - the starting location within data for the key data.
public CAST128Key(CAST128CryptoToken cryptoToken,
byte[] data,
int offset)
throws CryptoTokenException,
CryptoUnsupportedOperationException
CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in.
cryptoToken - The crypto token.data - The data to be used for the key data of this key.offset - The starting location within data for the key data.
CryptoTokenException - Thrown if an error occurs with the crypto
token or if the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown if an unsupported operation is called.
public CAST128Key(CAST128CryptoToken cryptoToken,
CryptoTokenSymmetricKeyData cryptoTokenData)
CAST128Key populating the key with 16 bytes or 128 bits
of data from the array passed in.
cryptoToken - The crypto token.cryptoTokenData - The data for this crypto token.| Method Detail |
|---|
public SymmetricCryptoToken getSymmetricCryptoToken()
getSymmetricCryptoToken in interface SymmetricKeypublic CAST128CryptoToken getCAST128CryptoToken()
CAST128CryptoToken object representing the crypto token.public CryptoTokenSymmetricKeyData getCryptoTokenData()
public String getAlgorithm()
getAlgorithm in interface Key
public int getLength()
throws CryptoTokenException
SymmetricKey
getLength in interface SymmetricKeyCryptoTokenException - Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
public int getBitLength()
throws CryptoTokenException
SymmetricKey
getBitLength in interface SymmetricKeyCryptoTokenException - Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
public byte[] getData()
throws CryptoTokenException,
CryptoUnsupportedOperationException
SymmetricKey
getData in interface SymmetricKeyCryptoTokenException - Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown when a call is made to
an unsupported operation.public int hashCode()
Objectjava.util.Hashtable.
The general contract of hashCode is:
hashCode method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
method, then calling the hashCode method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hashtables.
As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)
hashCode in class ObjectObject.equals(java.lang.Object),
Hashtablepublic boolean equals(Object obj)
Object
The equals method implements an equivalence relation:
x,
x.equals(x) should return true.
x and
y, x.equals(y) should return
true if and only if y.equals(x) returns
true.
x,
y, and z, if x.equals(y)
returns true and y.equals(z) returns
true, then x.equals(z) should return
true.
x
and y, multiple invocations of x.equals(y)
consistently return true or consistently return
false, provided no information used in
equals comparisons on the object is modified.
x,
x.equals(null) should return false.
The equals method for class Object implements
the most discriminating possible equivalence relation on objects;
that is, for any reference values x and y,
this method returns true if and only if x and
y refer to the same object (x==y has the
value true).
equals in class Objectobj - the reference object with which to compare.
true if this object is the same as the obj
argument; false otherwise.Boolean.hashCode(),
Hashtable
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