org.opencadc.inventory.storage

Class MessageDigestAPI

java.lang.Object

org.opencadc.inventory.storage.MessageDigestAPI

public class MessageDigestAPI
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
byte[]	digest()
java.lang.String	getAlgorithmName()
static java.util.List<java.lang.String>	getAlgorithmNames()
static MessageDigestAPI	getDigest(java.lang.String encodedState) Restore a digest from string form of internal state.
static java.lang.String	getEncodedState(MessageDigestAPI d) Get the current internal state of the specified digest.
static MessageDigestAPI	getInstance(java.lang.String algorithm) Create a new bouncy castle message digest that supports state encoding.
void	reset()
void	update(byte[] bytes)
void	update(byte[] bytes, int offset, int length)

Methods inherited from class java.lang.Object

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

Method Detail

getAlgorithmNames

public static java.util.List<java.lang.String> getAlgorithmNames()

getInstance

public static MessageDigestAPI getInstance(java.lang.String algorithm)
                                    throws java.security.NoSuchAlgorithmException

Create a new bouncy castle message digest that supports state encoding.

Parameters:

algorithm - case-insensitive digest algorithm

Returns:

message digest instance

Throws:

java.security.NoSuchAlgorithmException - if the specified algorithm is not supported

getEncodedState

public static java.lang.String getEncodedState(MessageDigestAPI d)

Get the current internal state of the specified digest.

Parameters:

d - an EncodableDigest instance

Returns:

string form of internal state

getDigest

public static MessageDigestAPI getDigest(java.lang.String encodedState)
                                  throws java.security.NoSuchAlgorithmException

Restore a digest from string form of internal state.

Parameters:

encodedState - string form of internal state

Returns:

restored digest

Throws:

java.security.NoSuchAlgorithmException - if the encoded state references an unsupported algorithm

getAlgorithmName

public java.lang.String getAlgorithmName()

update

public void update(byte[] bytes,
                   int offset,
                   int length)

update

public void update(byte[] bytes)

digest

public byte[] digest()

reset

public void reset()