MessageDigests (TrueUpdate Core 0.3 API)

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net.java.trueupdate.core.io
Class MessageDigests

java.lang.Object
  net.java.trueupdate.core.io.MessageDigests

@Immutable public class MessageDigests
extends Object
extends Object

Provides message digest functions.

Author:: Christian Schlichtherle

Method Summary
`static MessageDigest`	`create(String algorithm)` Returns a new message digest for the given algorithm name.
`static MessageDigest`	`sha1()` Returns a new SHA-1 message digest.
`static void`	`updateDigestFrom(MessageDigest digest, Source source)` Updates the given message digest with the binary data from the given source.
`static String`	`valueOf(MessageDigest digest)` Returns a positive, big-endian integer in hexadecimal string notation representing the value of the given message digest.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

create

public static MessageDigest create(String algorithm)

Returns a new message digest for the given algorithm name.

Parameters:: algorithm - the algorithm name.
Throws:: IllegalArgumentException - if no implementation of the algorithm is found.

sha1

public static MessageDigest sha1()

Returns a new SHA-1 message digest.

updateDigestFrom

public static void updateDigestFrom(MessageDigest digest,
                                    Source source)
                             throws IOException

Updates the given message digest with the binary data from the given source.

Parameters:: digest - the message digest to update.; source - the source for reading the binary data.
Throws:: IOException

valueOf

public static String valueOf(MessageDigest digest)

Returns a positive, big-endian integer in hexadecimal string notation representing the value of the given message digest. This is the canonical representation of message digests.

Parameters:: digest - a message digest.
Returns:: a positive, big-endian integer in hexadecimal string notation representing the value of the message digest.