gnu.javax.crypto.mac
Class BaseMac
- IMac
A base abstract class to facilitate MAC (Message Authentication Code)
implementations.
Object | clone()- Returns a clone copy of this instance.
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abstract byte[] | digest()- Completes the MAC by performing final operations such as padding
and resetting the instance.
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abstract void | init(Map<K,V> attributes)- Initialises the algorithm with designated attributes.
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int | macSize()- Returns the output length in bytes of this MAC algorithm.
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String | name()- Returns the canonical name of this algorithm.
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void | reset()- Resets the algorithm instance for re-initialisation and use with other
characteristics.
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abstract boolean | selfTest()- A basic test.
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void | update(byte b)- Continues a MAC operation using the input byte.
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void | update(byte[] b, int offset, int len)- Continues a MAC operation, by filling the buffer, processing data
in the algorithm's MAC_SIZE-bit block(s), updating the context and count,
and buffering the remaining bytes in buffer for the next operation.
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
BaseMac
protected BaseMac(String name,
IMessageDigest underlyingHash) Trivial constructor for use by concrete subclasses.
name - the canonical name of this instance.underlyingHash - the underlying message digest algorithm instance.
reset
public void reset()
Resets the algorithm instance for re-initialisation and use with other
characteristics. This method always succeeds.
- reset in interface IMac
update
public void update(byte[] b,
int offset,
int len) Continues a MAC operation, by filling the buffer, processing data
in the algorithm's MAC_SIZE-bit block(s), updating the context and count,
and buffering the remaining bytes in buffer for the next operation.
- update in interface IMac
offset - start of meaningful bytes in input block.
BaseMac.java --
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