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java.lang.Object | +--com.sshtools.j2ssh.transport.hmac.HmacSha
Implements the SHA Hash Message authentication algorithm
Constructor Summary | |
HmacSha()
Constructor for the HmacSha object |
Method Summary | |
byte[] |
generate(long sequenceNo,
byte[] data,
int offset,
int len)
Generates the mac |
int |
getMacLength()
Gets the mac length |
void |
init(byte[] keydata)
Initates the message authentication with the supplied key data |
boolean |
verify(long sequenceNo,
byte[] data)
Verifies the mac received |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public HmacSha()
Method Detail |
public void init(byte[] keydata) throws AlgorithmInitializationException
init
in interface SshHmac
keydata
- Key data produced during key
exchange
AlgorithmInitializationException
- Thrown if the mac cannot be
initializedpublic byte[] generate(long sequenceNo, byte[] data, int offset, int len)
generate
in interface SshHmac
sequenceNo
- The sequence no of the messagedata
- The message dataoffset
- Description of the Parameterlen
- Description of the Parameter
public boolean verify(long sequenceNo, byte[] data)
verify
in interface SshHmac
sequenceNo
- The sequence no of the messagedata
- The message data
public int getMacLength()
getMacLength
in interface SshHmac
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