java.lang.Object
- org.bouncycastle.crypto.digests.GeneralDigest

All Implemented Interfaces:

Digest, ExtendedDigest, Memoable

Direct Known Subclasses:

MD4Digest, MD5Digest, RIPEMD128Digest, RIPEMD160Digest, RIPEMD256Digest, RIPEMD320Digest, SHA1Digest, SHA224Digest, SHA256Digest, SM3Digest
```
public abstract class GeneralDigest
extends java.lang.Object
implements ExtendedDigest, Memoable
```
base implementation of MD4 family style digest as outlined in "Handbook of Applied Cryptography", pages 344 - 347.

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`GeneralDigest()`	Standard constructor
`protected`	`GeneralDigest(byte[] encodedState)`
`protected`	`GeneralDigest(GeneralDigest t)`	Copy constructor.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`copyIn(GeneralDigest t)`
`void`	`finish()`
`int`	`getByteLength()`	Return the size in bytes of the internal buffer the digest applies it's compression function to.
`protected void`	`populateState(byte[] state)`
`protected abstract void`	`processBlock()`
`protected abstract void`	`processLength(long bitLength)`
`protected abstract void`	`processWord(byte[] in, int inOff)`
`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.

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

Methods inherited from interface org.bouncycastle.util.Memoable
copy, reset

- Constructor Detail
  - GeneralDigest
```
protected GeneralDigest()
```
    Standard constructor
  - GeneralDigest
```
protected GeneralDigest(GeneralDigest t)
```
    Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.
  - GeneralDigest
```
protected GeneralDigest(byte[] encodedState)
```
- Method Detail
  - copyIn
```
protected void copyIn(GeneralDigest t)
```
  - 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
  - populateState
```
protected void populateState(byte[] state)
```
  - getByteLength
```
public int getByteLength()
```
    Description copied from interface: ExtendedDigest
    
    Return the size in bytes of the internal buffer the digest applies it's compression function to.
    
    Specified by:
    
    getByteLength in interface ExtendedDigest
    
    Returns:
    
    byte length of the digests internal buffer.
  - processWord
```
protected abstract void processWord(byte[] in,
                                    int inOff)
```
  - processLength
```
protected abstract void processLength(long bitLength)
```
  - processBlock
```
protected abstract void processBlock()
```

Class GeneralDigest

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.bouncycastle.crypto.Digest

Methods inherited from interface org.bouncycastle.util.Memoable

Constructor Detail

GeneralDigest

GeneralDigest

GeneralDigest

Method Detail

copyIn

update

update

finish

reset

populateState

getByteLength

processWord

processLength

processBlock