org.bouncycastle.crypto
Interface Mac
- BlockCipherMac, CBCBlockCipherMac, CFBBlockCipherMac, CMac, GOST28147Mac, HMac, ISO9797Alg3Mac, OldHMac, VMPCMac
The base interface for implementations of message authentication codes (MACs).
int | doFinal(byte[] out, int outOff) - Compute the final statge of the MAC writing the output to the out
parameter.
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String | getAlgorithmName() - Return the name of the algorithm the MAC implements.
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int | getMacSize() - Return the block size for this MAC (in bytes).
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void | init(CipherParameters params) - Initialise the MAC.
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void | reset() - Reset the MAC.
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void | update(byte in) - add a single byte to the mac for processing.
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void | update(byte[] in, int inOff, int len)
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doFinal
public int doFinal(byte[] out,
int outOff)
throws DataLengthException,
IllegalStateException
Compute the final statge of the MAC writing the output to the out
parameter.
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.
getAlgorithmName
public String getAlgorithmName()
Return the name of the algorithm the MAC implements.
- the name of the algorithm the MAC implements.
getMacSize
public int getMacSize()
Return the block size for this MAC (in bytes).
- the block size for this MAC in bytes.
init
public void init(CipherParameters params)
throws IllegalArgumentException
Initialise the MAC.
params
- the key and other data required by the MAC.
reset
public void reset()
Reset the MAC. At the end of resetting the MAC should be in the
in the same state it was after the last init (if there was one).
update
public void update(byte in)
throws IllegalStateException
add a single byte to the mac for processing.
in
- the byte to be processed.
update
public void update(byte[] in,
int inOff,
int len)
throws DataLengthException,
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.