com.tencent.kona.crypto.provider

Class SM3HMac

java.lang.Object

javax.crypto.MacSpi

com.tencent.kona.crypto.provider.SM3HMac

public class SM3HMac
extends javax.crypto.MacSpi

Constructor Summary

Constructors

Constructor and Description
SM3HMac()

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineDoFinal() Completes the HMAC computation and resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
protected int	engineGetMacLength() Returns the length of the HMAC in bytes.
protected void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params) Initializes the HMAC with the given secret key and algorithm parameters.
protected void	engineReset() Resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.
protected void	engineUpdate(byte input) Processes the given byte.
protected void	engineUpdate(byte[] input, int offset, int len) Processes the first len bytes in input, starting at offset.
protected void	engineUpdate(java.nio.ByteBuffer input) Processes the input.remaining() bytes in the ByteBuffer input.

Methods inherited from class javax.crypto.MacSpi

clone

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SM3HMac

public SM3HMac()

Method Detail

engineGetMacLength

protected int engineGetMacLength()

Returns the length of the HMAC in bytes.

Specified by:

engineGetMacLength in class javax.crypto.MacSpi

Returns:

the HMAC length in bytes.

engineInit

protected void engineInit(java.security.Key key,
                          java.security.spec.AlgorithmParameterSpec params)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException

Initializes the HMAC with the given secret key and algorithm parameters.

Specified by:

engineInit in class javax.crypto.MacSpi

Parameters:

key - the secret key.

params - the algorithm parameters.

Throws:

java.security.InvalidKeyException - if the given key is inappropriate for initializing this MAC.

java.security.InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this MAC.

engineUpdate

protected void engineUpdate(byte input)

Processes the given byte.

Specified by:

engineUpdate in class javax.crypto.MacSpi

Parameters:

input - the input byte to be processed.

engineUpdate

protected void engineUpdate(byte[] input,
                            int offset,
                            int len)

Processes the first len bytes in input, starting at offset.

Specified by:

engineUpdate in class javax.crypto.MacSpi

Parameters:

input - the input buffer.

offset - the offset in input where the input starts.

len - the number of bytes to process.

engineUpdate

protected void engineUpdate(java.nio.ByteBuffer input)

Processes the input.remaining() bytes in the ByteBuffer input.

Overrides:

engineUpdate in class javax.crypto.MacSpi

Parameters:

input - the input byte buffer.

engineDoFinal

protected byte[] engineDoFinal()

Completes the HMAC computation and resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.

Specified by:

engineDoFinal in class javax.crypto.MacSpi

Returns:

the HMAC result.

engineReset

protected void engineReset()

Resets the HMAC for further use, maintaining the secret key that the HMAC was initialized with.

Specified by:

engineReset in class javax.crypto.MacSpi