Package org.mozilla.jss.pkcs11

Class PK11MessageDigest

java.lang.Object

org.mozilla.jss.crypto.JSSMessageDigest

org.mozilla.jss.pkcs11.PK11MessageDigest

public final class PK11MessageDigest
extends JSSMessageDigest

Message Digesting with PKCS #11.

Method Summary

Modifier and Type	Method	Description
int	digest(byte[] outbuf, int offset, int len)	Completes digesting, storing the result into the provided array.
DigestAlgorithm	getAlgorithm()
void	initHMAC(SymmetricKey key)	Initializes an HMAC digest with the given symmetric key.
void	reset()	Resets this digest for further use.
void	update(byte[] input, int offset, int len)	Updates the digest with a portion of an array.

Methods inherited from class org.mozilla.jss.crypto.JSSMessageDigest

digest, digest, getOutputSize, update, update

Methods inherited from class java.lang.Object

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

Method Detail

initHMAC

public void initHMAC(SymmetricKey key)
              throws java.security.DigestException,
                     java.security.InvalidKeyException

Description copied from class: JSSMessageDigest

Initializes an HMAC digest with the given symmetric key. This also has the effect of resetting the digest.

Specified by:

initHMAC in class JSSMessageDigest

Parameters:

key - Symmetric key.

Throws:

java.security.DigestException - If this algorithm is not an HMAC algorithm.

java.security.InvalidKeyException - If the given key is not valid.

update

public void update(byte[] input,
                   int offset,
                   int len)
            throws java.security.DigestException

Description copied from class: JSSMessageDigest

Updates the digest with a portion of an array.

Specified by:

update in class JSSMessageDigest

Parameters:

input - An array from which to update the digest.

offset - The index in the array at which to start digesting.

len - The number of bytes to digest.

Throws:

java.security.DigestException - If an error occurs while digesting.

digest

public int digest(byte[] outbuf,
                  int offset,
                  int len)
           throws java.security.DigestException

Description copied from class: JSSMessageDigest

Completes digesting, storing the result into the provided array.

Specified by:

digest in class JSSMessageDigest

Parameters:

outbuf - The buffer in which to place the digest output.

offset - The offset in the buffer at which to store the output.

len - The amount of space available in the buffer for the digest output.

Returns:

The number of bytes actually stored into buf.

Throws:

java.security.DigestException - If the provided space is too small for the digest, or an error occurs with the digest.

reset

public void reset()
           throws java.security.DigestException

Description copied from class: JSSMessageDigest

Resets this digest for further use. This clears all input and output streams. If this is an HMAC digest, the HMAC key is not cleared.

Specified by:

reset in class JSSMessageDigest

Throws:

java.security.DigestException - If an error occurred.

getAlgorithm

public DigestAlgorithm getAlgorithm()

Specified by:

getAlgorithm in class JSSMessageDigest

Returns:

The algorithm that this digest uses.