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Bouncy Castle Cryptography 1.45 | ||||||||
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public interface Mac
The base interface for implementations of message authentication codes (MACs).
| Method Summary | |
|---|---|
int |
doFinal(byte[] out,
int outOff)
Compute the final stage of the MAC writing the output to the out parameter. |
java.lang.String |
getAlgorithmName()
Return the name of the algorithm the MAC implements. |
int |
getMacSize()
Return the block size for this MAC (in bytes). |
void |
init(CipherParameters params)
Initialise the MAC. |
void |
reset()
Reset the MAC. |
void |
update(byte in)
add a single byte to the mac for processing. |
void |
update(byte[] in,
int inOff,
int len)
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| Method Detail |
|---|
void init(CipherParameters params)
throws java.lang.IllegalArgumentException
params - the key and other data required by the MAC.
java.lang.IllegalArgumentException - if the params argument is
inappropriate.java.lang.String getAlgorithmName()
int getMacSize()
void update(byte in)
throws java.lang.IllegalStateException
in - the byte to be processed.
java.lang.IllegalStateException - if the MAC is not initialised.
void update(byte[] in,
int inOff,
int len)
throws DataLengthException,
java.lang.IllegalStateException
in - the array containing the input.inOff - the index in the array the data begins at.len - the length of the input starting at inOff.
java.lang.IllegalStateException - if the MAC is not initialised.
DataLengthException - if there isn't enough data in in.
int doFinal(byte[] out,
int outOff)
throws DataLengthException,
java.lang.IllegalStateException
doFinal leaves the MAC in the same state it was after the last init.
out - the array the MAC is to be output to.outOff - the offset into the out buffer the output is to start at.
DataLengthException - if there isn't enough space in out.
java.lang.IllegalStateException - if the MAC is not initialised.void reset()
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