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java.lang.Objectnet.rim.device.api.crypto.CAST128EncryptorEngine
public final class CAST128EncryptorEngine
Creates a CAST 128 encryption engine. 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.
(@link CAST128Key More information on the key used in this engine.)
| Field Summary | ||
|---|---|---|
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static int |
BLOCK_LENGTH
A public value stating the block length in bytes for the algorithm, namely 8 bytes. |
| Constructor Summary | ||
|---|---|---|
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CAST128EncryptorEngine(CAST128Key key)
Creates a CAST128EncryptorEngineobject given a CAST128 key. |
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| Method Summary | ||
|---|---|---|
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void |
encrypt(byte[] plaintext,
int plaintextOffset,
byte[] ciphertext,
int ciphertextOffset)
Encrypts a block of the given plaintext into a block of ciphertext. |
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String |
getAlgorithm()
Returns the name of the algorithm used, ie "CAST128". |
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int |
getBlockLength()
Returns the block length of the engine in bytes. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final int BLOCK_LENGTH
| Constructor Detail |
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public CAST128EncryptorEngine(CAST128Key key)
throws CryptoTokenException,
CryptoUnsupportedOperationException
CAST128EncryptorEngineobject given a CAST128 key.
key - The CAST128 key to use for the engine.
CryptoTokenException - Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown if a call is made to
an unsupported operation.| Method Detail |
|---|
public String getAlgorithm()
This method will always return the string "CAST128".
getAlgorithm in interface BlockEncryptorEnginepublic int getBlockLength()
BlockEncryptorEngine
getBlockLength in interface BlockEncryptorEngine
public void encrypt(byte[] plaintext,
int plaintextOffset,
byte[] ciphertext,
int ciphertextOffset)
throws CryptoTokenException
BlockEncryptorEngine
encrypt in interface BlockEncryptorEngineplaintext - A byte array containing the input that is to be encrypted.plaintextOffset - The starting offset, or initial byte position, of
the data within the input array.ciphertext - A byte array to hold the ciphertext output from the method.ciphertextOffset - The starting offset, or initial byte position, of
the data within the output array.
CryptoTokenException - Thrown when an problem occurs with the
crypto token or the crypto token is invalid.
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