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## org.bouncycastle.crypto.digests
Class LongDigest

    java.lang.Object
      |
      +--org.bouncycastle.crypto.digests.LongDigest

All Implemented Interfaces:
  Digest

Direct Known Subclasses:
  SHA384Digest, SHA512Digest

public abstract class LongDigest
extends java.lang.Object
implements Digest

Base class for SHA-384 and SHA-512.

Field Summary
`protected long` | `H1`
`protected long` | `H2`
`protected long` | `H3`
`protected long` | `H4`
`protected long` | `H5`
`protected long` | `H6`
`protected long` | `H7`
`protected long` | `H8`

Constructor Summary
`protected` | `LongDigest()` Constructor for variable length word
`protected` | `LongDigest(LongDigest t)` Copy constructor.

Method Summary
`void` | `finish()`
`protected void` | `processBlock()`
`protected void` | `processLength(long lowW, long hiW)`
`protected void` | `processWord(byte[] in, int inOff)`
`void` | `reset()` reset the digest back to it's initial state.
`protected void` | `unpackWord(long word, byte[] out, int outOff)`
`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.

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

Methods inherited from interface org.bouncycastle.crypto.Digest
`doFinal, getAlgorithmName, getDigestSize`

Field Detail

### H1

    protected long H1

### H2

    protected long H2

### H3

    protected long H3

### H4

    protected long H4

### H5

    protected long H5

### H6

    protected long H6

### H7

    protected long H7

### H8

    protected long H8

Constructor Detail

### LongDigest

    protected LongDigest()

  Constructor for variable length word

### LongDigest

    protected LongDigest(LongDigest t)

  Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.

Method Detail

### update

    public void update(byte in)

  Description copied from interface: `Digest`
  update the message digest with a single byte.

  Specified by:
    `update` in interface `Digest`
  Parameters:
    `in` - the input byte to be entered.

### update

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

  Description copied from interface: `Digest`
  update the message digest with a block of bytes.

  Specified by:
    `update` in interface `Digest`
  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.

### finish

    public void finish()

### reset

    public void reset()

  Description copied from interface: `Digest`
  reset the digest back to it's initial state.

  Specified by:
    `reset` in interface `Digest`

### processWord

    protected void processWord(byte[] in,
                               int inOff)

### unpackWord

    protected void unpackWord(long word,
                              byte[] out,
                              int outOff)

### processLength

    protected void processLength(long lowW,
                                 long hiW)

### processBlock

    protected void processBlock()

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