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java.lang.Objectorg.bouncycastle.crypto.macs.HMac
public class HMac
HMAC implementation based on RFC2104 H(K XOR opad, H(K XOR ipad, text)) modified by jrandom to use the session key byte array directly and to cache a frequently used buffer (called on doFinal). changes released into the public domain in 2005.
Constructor Summary | |
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HMac(Digest digest)
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HMac(Digest digest,
int sz)
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Method Summary | |
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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). |
Digest |
getUnderlyingDigest()
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void |
init(byte[] key)
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 |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public HMac(Digest digest)
public HMac(Digest digest, int sz)
Method Detail |
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public java.lang.String getAlgorithmName()
Mac
getAlgorithmName
in interface Mac
public Digest getUnderlyingDigest()
public void init(byte[] key)
Mac
init
in interface Mac
key
- the key required by the MAC.public int getMacSize()
Mac
getMacSize
in interface Mac
public void update(byte in)
Mac
update
in interface Mac
in
- the byte to be processed.public void update(byte[] in, int inOff, int len)
update
in interface Mac
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.public int doFinal(byte[] out, int outOff)
Mac
doFinal leaves the MAC in the same state it was after the last init.
doFinal
in interface Mac
out
- the array the MAC is to be output to.outOff
- the offset into the out buffer the output is to start at.public void reset()
reset
in interface Mac
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