org.apache.geronimo.util.crypto
Interface Digest

public interface Digest

interface that a message digest conforms to.

Method Summary

int	doFinal(byte[] out, int outOff) close the digest, producing the final digest value.
String	getAlgorithmName() return the algorithm name
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
void	reset() reset the digest back to it's initial state.
void	update(byte in) update the message digest with a single byte.
void	update(byte[] in, int inOff, int len) update the message digest with a block of bytes.

Method Detail

getAlgorithmName

String getAlgorithmName()

return the algorithm name

Returns:

the algorithm name

getDigestSize

int getDigestSize()

return the size, in bytes, of the digest produced by this message digest.

Returns:

the size, in bytes, of the digest produced by this message digest.

update

void update(byte in)

update the message digest with a single byte.

Parameters:

in - the input byte to be entered.

update

void update(byte[] in,
            int inOff,
            int len)

update the message digest with a block of bytes.

Parameters:

in - the byte array containing the data.

inOff - the offset into the byte array where the data starts.

len - the length of the data.

doFinal

int doFinal(byte[] out,
            int outOff)

close the digest, producing the final digest value. The doFinal call leaves the digest reset.

Parameters:

out - the array the digest is to be copied into.

outOff - the offset into the out array the digest is to start at.

reset

void reset()

reset the digest back to it's initial state.