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Bouncy Castle Cryptography 1.20 | ||||||||
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java.lang.Object | +--org.bouncycastle.crypto.macs.BlockCipherMac
| Constructor Summary | |
BlockCipherMac(BlockCipher cipher)
Deprecated. use CBCBlockCipherMac |
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BlockCipherMac(BlockCipher cipher,
int macSizeInBits)
Deprecated. use CBCBlockCipherMac |
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| Method Summary | |
int |
doFinal(byte[] out,
int outOff)
Compute the final statge 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 cipher (in bytes). |
void |
init(CipherParameters params)
Initialise the MAC. |
void |
reset()
Reset the mac generator. |
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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| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public BlockCipherMac(BlockCipher cipher)
cipher - the cipher to be used as the basis of the MAC generation.
public BlockCipherMac(BlockCipher cipher,
int macSizeInBits)
Note: the size of the MAC must be at least 16 bits (FIPS Publication 113), and in general should be less than the size of the block cipher as it reduces the chance of an exhaustive attack (see Handbook of Applied Cryptography).
cipher - the cipher to be used as the basis of the MAC generation.macSizeInBits - the size of the MAC in bits, must be a multiple of 8.| Method Detail |
public java.lang.String getAlgorithmName()
MacgetAlgorithmName in interface Macorg.bouncycastle.crypto.Macpublic void init(CipherParameters params)
Macinit in interface Macorg.bouncycastle.crypto.Macparam - the key and other data required by the MAC.java.lang.IllegalArgumentException - if the params argument is
inappropriate.public int getMacSize()
MacgetMacSize in interface Macorg.bouncycastle.crypto.Macpublic void update(byte in)
Macupdate in interface Macorg.bouncycastle.crypto.Macin - the byte to be processed.java.lang.IllegalStateException - if the MAC is not initialised.
public void update(byte[] in,
int inOff,
int len)
update in interface Macorg.bouncycastle.crypto.Macin - 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.
public int doFinal(byte[] out,
int outOff)
MacdoFinal leaves the MAC in the same state it was after the last init.
doFinal in interface Macorg.bouncycastle.crypto.Macout - 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.public void reset()
reset in interface Mac
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Bouncy Castle Cryptography 1.20 | ||||||||
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