Package org.bouncycastle.crypto.macs
Class KMAC
- java.lang.Object
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- org.bouncycastle.crypto.macs.KMAC
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Constructor Summary
Constructors Constructor Description KMAC(int bitLength, byte[] S)
Base constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
doFinal(byte[] out, int outOff)
Compute the final stage of the MAC writing the output to the out parameter.int
doFinal(byte[] out, int outOff, int outLen)
Output the results of the final calculation for this digest to outLen number of bytes.int
doOutput(byte[] out, int outOff, int outLen)
Start outputting the results of the final calculation for this digest.java.lang.String
getAlgorithmName()
Return the name of the algorithm the MAC implements.int
getByteLength()
Return the size in bytes of the internal buffer the digest applies it's compression function to.int
getDigestSize()
return the size, in bytes, of the digest produced by this message digest.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)
update the message digest with a block of bytes.
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Method Detail
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init
public void init(CipherParameters params) throws java.lang.IllegalArgumentException
Description copied from interface:Mac
Initialise the MAC.
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getAlgorithmName
public java.lang.String getAlgorithmName()
Description copied from interface:Mac
Return the name of the algorithm the MAC implements.- Specified by:
getAlgorithmName
in interfaceDigest
- Specified by:
getAlgorithmName
in interfaceMac
- Returns:
- the name of the algorithm the MAC implements.
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getByteLength
public int getByteLength()
Description copied from interface:ExtendedDigest
Return the size in bytes of the internal buffer the digest applies it's compression function to.- Specified by:
getByteLength
in interfaceExtendedDigest
- Returns:
- byte length of the digests internal buffer.
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getMacSize
public int getMacSize()
Description copied from interface:Mac
Return the block size for this MAC (in bytes).- Specified by:
getMacSize
in interfaceMac
- Returns:
- the block size for this MAC in bytes.
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getDigestSize
public int getDigestSize()
Description copied from interface:Digest
return the size, in bytes, of the digest produced by this message digest.- Specified by:
getDigestSize
in interfaceDigest
- Returns:
- the size, in bytes, of the digest produced by this message digest.
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update
public void update(byte in) throws java.lang.IllegalStateException
Description copied from interface:Mac
add a single byte to the mac for processing.
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update
public void update(byte[] in, int inOff, int len) throws DataLengthException, java.lang.IllegalStateException
Description copied from interface:Digest
update the message digest with a block of bytes.- Specified by:
update
in interfaceDigest
- Specified by:
update
in interfaceMac
- Parameters:
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.- Throws:
DataLengthException
- if there isn't enough data in in.java.lang.IllegalStateException
- if the MAC is not initialised.
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doFinal
public int doFinal(byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
Description copied from interface:Mac
Compute the final stage of the MAC writing the output to the out parameter.doFinal leaves the MAC in the same state it was after the last init.
- Specified by:
doFinal
in interfaceDigest
- Specified by:
doFinal
in interfaceMac
- Parameters:
out
- the array the MAC is to be output to.outOff
- the offset into the out buffer the output is to start at.- Throws:
DataLengthException
- if there isn't enough space in out.java.lang.IllegalStateException
- if the MAC is not initialised.
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doFinal
public int doFinal(byte[] out, int outOff, int outLen)
Description copied from interface:Xof
Output the results of the final calculation for this digest to outLen number of bytes.
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doOutput
public int doOutput(byte[] out, int outOff, int outLen)
Description copied from interface:Xof
Start outputting the results of the final calculation for this digest. Unlike doFinal, this method will continue producing output until the Xof is explicitly reset, or signals otherwise.
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