Package org.bouncycastle.crypto.engines
Class ChaCha7539Engine
- java.lang.Object
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- org.bouncycastle.crypto.engines.Salsa20Engine
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- org.bouncycastle.crypto.engines.ChaCha7539Engine
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- All Implemented Interfaces:
SkippingCipher
,SkippingStreamCipher
,StreamCipher
public class ChaCha7539Engine extends Salsa20Engine
Implementation of Daniel J. Bernstein's ChaCha stream cipher.
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Field Summary
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Fields inherited from class org.bouncycastle.crypto.engines.Salsa20Engine
DEFAULT_ROUNDS, engineState, rounds, sigma, tau, x
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Constructor Summary
Constructors Constructor Description ChaCha7539Engine()
Creates a 20 rounds ChaCha engine.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
advanceCounter()
protected void
advanceCounter(long diff)
protected void
generateKeyStream(byte[] output)
java.lang.String
getAlgorithmName()
Return the name of the algorithm the cipher implements.protected long
getCounter()
protected int
getNonceSize()
protected void
resetCounter()
protected void
retreatCounter()
protected void
retreatCounter(long diff)
protected void
setKey(byte[] keyBytes, byte[] ivBytes)
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Methods inherited from class org.bouncycastle.crypto.engines.Salsa20Engine
getPosition, init, packTauOrSigma, processBytes, reset, returnByte, salsaCore, seekTo, skip
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Method Detail
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getAlgorithmName
public java.lang.String getAlgorithmName()
Description copied from interface:StreamCipher
Return the name of the algorithm the cipher implements.- Specified by:
getAlgorithmName
in interfaceStreamCipher
- Overrides:
getAlgorithmName
in classSalsa20Engine
- Returns:
- the name of the algorithm the cipher implements.
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getNonceSize
protected int getNonceSize()
- Overrides:
getNonceSize
in classSalsa20Engine
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advanceCounter
protected void advanceCounter(long diff)
- Overrides:
advanceCounter
in classSalsa20Engine
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advanceCounter
protected void advanceCounter()
- Overrides:
advanceCounter
in classSalsa20Engine
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retreatCounter
protected void retreatCounter(long diff)
- Overrides:
retreatCounter
in classSalsa20Engine
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retreatCounter
protected void retreatCounter()
- Overrides:
retreatCounter
in classSalsa20Engine
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getCounter
protected long getCounter()
- Overrides:
getCounter
in classSalsa20Engine
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resetCounter
protected void resetCounter()
- Overrides:
resetCounter
in classSalsa20Engine
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setKey
protected void setKey(byte[] keyBytes, byte[] ivBytes)
- Overrides:
setKey
in classSalsa20Engine
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generateKeyStream
protected void generateKeyStream(byte[] output)
- Overrides:
generateKeyStream
in classSalsa20Engine
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