org.spongycastle.tls.crypto.impl.jcajce

Class JceTlsHMAC

java.lang.Object

org.spongycastle.tls.crypto.impl.jcajce.JceTlsHMAC

All Implemented Interfaces:

TlsHMAC, TlsMAC

public class JceTlsHMAC
extends java.lang.Object
implements TlsHMAC

Wrapper class for a JCE MAC based on HMAC to provide the necessary operations for TLS.

Constructor Summary

Constructors

Constructor and Description
JceTlsHMAC(javax.crypto.Mac hmac, java.lang.String algorithm) Base constructor.
JceTlsHMAC(javax.crypto.Mac hmac, java.lang.String algorithm, int internalBlockSize) Base constructor specifying the internal block size.

Method Summary

Modifier and Type	Method and Description
byte[]	calculateMAC() Return calculated MAC for any input passed in.
int	getInternalBlockSize() Return the internal block size for the message digest underlying this HMAC service.
int	getMacLength() Return the length of the MAC generated by this service.
void	reset() Reset the MAC underlying this service.
void	setKey(byte[] key, int keyOff, int keyLen) Set the key to be used by the MAC implementation supporting this service.
void	update(byte[] input, int inOff, int length) Update the MAC with the passed in input.

Methods inherited from class java.lang.Object

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

Constructor Detail

JceTlsHMAC

public JceTlsHMAC(javax.crypto.Mac hmac,
                  java.lang.String algorithm)

Base constructor.

Parameters:

hmac - MAC implementation.

algorithm - algorithm name to use for keys and to get the internal block size.

JceTlsHMAC

public JceTlsHMAC(javax.crypto.Mac hmac,
                  java.lang.String algorithm,
                  int internalBlockSize)

Base constructor specifying the internal block size.

Parameters:

hmac - MAC implementation.

algorithm - algorithm name to use for keys and to get the internal block size.

internalBlockSize - internal block size of the message digest underlying the HMAC.

Method Detail

setKey

public void setKey(byte[] key,
                   int keyOff,
                   int keyLen)

Description copied from interface: TlsMAC

Set the key to be used by the MAC implementation supporting this service.

Specified by:

setKey in interface TlsMAC

Parameters:

key - array holding the MAC key.

keyOff - offset into the array the key starts at.

keyLen - length of the key in the array.

update

public void update(byte[] input,
                   int inOff,
                   int length)

Description copied from interface: TlsMAC

Update the MAC with the passed in input.

Specified by:

update in interface TlsMAC

Parameters:

input - input array containing the data.

inOff - offset into the input array the input starts at.

length - the length of the input data.

calculateMAC

public byte[] calculateMAC()

Description copied from interface: TlsMAC

Return calculated MAC for any input passed in.

Specified by:

calculateMAC in interface TlsMAC

Returns:

the MAC value.

getInternalBlockSize

public int getInternalBlockSize()

Description copied from interface: TlsHMAC

Return the internal block size for the message digest underlying this HMAC service.

Specified by:

getInternalBlockSize in interface TlsHMAC

Returns:

the internal block size for the digest (in bytes).

getMacLength

public int getMacLength()

Description copied from interface: TlsMAC

Return the length of the MAC generated by this service.

Specified by:

getMacLength in interface TlsMAC

Returns:

the MAC length.

reset

public void reset()

Description copied from interface: TlsMAC

Reset the MAC underlying this service.

Specified by:

reset in interface TlsMAC