Package org.bouncycastle.crypto.engines

Class Grain128AEADEngine

java.lang.Object
org.bouncycastle.crypto.engines.Grain128AEADEngine
All Implemented Interfaces:
AEADCipher
public class Grain128AEADEngine extends Object implements AEADCipher
Grain-128 AEAD, based on the current round 3 submission, https://grain-128aead.github.io/

  • Field Details

    • forEncryption

      protected boolean forEncryption

    • algorithmName

      protected String algorithmName

    • KEY_SIZE

      protected int KEY_SIZE

    • IV_SIZE

      protected int IV_SIZE

    • MAC_SIZE

      protected int MAC_SIZE

    • initialAssociatedText

      protected byte[] initialAssociatedText

    • mac

      protected byte[] mac

    • m_buf

      protected byte[] m_buf

    • m_aad

      protected byte[] m_aad

    • m_bufPos

      protected int m_bufPos

    • m_aadPos

      protected int m_aadPos

    • AADBufferSize

      protected int AADBufferSize

    • BlockSize

      protected int BlockSize

    • m_state

      protected org.bouncycastle.crypto.engines.AEADBaseEngine.State m_state

    • m_bufferSizeDecrypt

      protected int m_bufferSizeDecrypt

    • processor

      protected org.bouncycastle.crypto.engines.AEADBaseEngine.AADProcessingBuffer processor

    • aadOperator

      protected org.bouncycastle.crypto.engines.AEADBaseEngine.AADOperator aadOperator

    • dataOperator

      protected org.bouncycastle.crypto.engines.AEADBaseEngine.DataOperator dataOperator

  • Constructor Details

    • Grain128AEADEngine

      public Grain128AEADEngine()

  • Method Details

    • init

      protected void init(byte[] key, byte[] iv) throws IllegalArgumentException
      Initialize a Grain-128AEAD cipher.
      Throws:
      IllegalArgumentException

    • reset

      protected void reset(boolean clearMac)

    • getUpdateOutputSize

      public int getUpdateOutputSize(int len)
      Description copied from interface: AEADCipher
      return the size of the output buffer required for a processBytes an input of len bytes.

      The returned size may be dependent on the initialisation of this cipher and may not be accurate once subsequent input data is processed - this method should be invoked immediately prior to input data being processed.

      Specified by:
      getUpdateOutputSize in interface AEADCipher
      Parameters:
      len - the length of the input.
      Returns:
      the space required to accommodate a call to processBytes with len bytes of input.

    • finishAAD

      protected void finishAAD(org.bouncycastle.crypto.engines.AEADBaseEngine.State nextState, boolean isDoFinal)

    • processFinalBlock

      protected void processFinalBlock(byte[] output, int outOff)

    • processBufferAAD

      protected void processBufferAAD(byte[] input, int inOff)

    • processFinalAAD

      protected void processFinalAAD()

    • processBufferEncrypt

      protected void processBufferEncrypt(byte[] input, int inOff, byte[] output, int outOff)

    • processBufferDecrypt

      protected void processBufferDecrypt(byte[] input, int inOff, byte[] output, int outOff)

    • getAlgorithmName

      public String getAlgorithmName()
      Description copied from interface: AEADCipher
      Return the name of the algorithm.
      Specified by:
      getAlgorithmName in interface AEADCipher
      Returns:
      the algorithm name.

    • getKeyBytesSize

      public int getKeyBytesSize()

    • getIVBytesSize

      public int getIVBytesSize()

    • getMac

      public byte[] getMac()
      Description copied from interface: AEADCipher
      Return the value of the MAC associated with the last stream processed.
      Specified by:
      getMac in interface AEADCipher
      Returns:
      MAC for plaintext data.

    • init

      public void init(boolean forEncryption, CipherParameters params)
      Description copied from interface: AEADCipher
      initialise the underlying cipher. Parameter can either be an AEADParameters or a ParametersWithIV object.
      Specified by:
      init in interface AEADCipher
      Parameters:
      forEncryption - true if we are setting up for encryption, false otherwise.
      params - the necessary parameters for the underlying cipher to be initialised.

    • reset

      public void reset()
      Description copied from interface: AEADCipher
      Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).
      Specified by:
      reset in interface AEADCipher

    • setInnerMembers

      protected void setInnerMembers(org.bouncycastle.crypto.engines.AEADBaseEngine.ProcessingBufferType type, org.bouncycastle.crypto.engines.AEADBaseEngine.AADOperatorType aadOperatorType, org.bouncycastle.crypto.engines.AEADBaseEngine.DataOperatorType dataOperatorType)

    • processAADByte

      public void processAADByte(byte input)
      Description copied from interface: AEADCipher
      Add a single byte to the associated data check.
      If the implementation supports it, this will be an online operation and will not retain the associated data.
      Specified by:
      processAADByte in interface AEADCipher
      Parameters:
      input - the byte to be processed.

    • processAADBytes

      public void processAADBytes(byte[] input, int inOff, int len)
      Description copied from interface: AEADCipher
      Add a sequence of bytes to the associated data check.
      If the implementation supports it, this will be an online operation and will not retain the associated data.
      Specified by:
      processAADBytes in interface AEADCipher
      Parameters:
      input - the input byte array.
      inOff - the offset into the in array where the data to be processed starts.
      len - the number of bytes to be processed.

    • processByte

      public int processByte(byte in, byte[] out, int outOff) throws DataLengthException
      Description copied from interface: AEADCipher
      encrypt/decrypt a single byte.
      Specified by:
      processByte in interface AEADCipher
      Parameters:
      in - the byte to be processed.
      out - the output buffer the processed byte goes into.
      outOff - the offset into the output byte array the processed data starts at.
      Returns:
      the number of bytes written to out.
      Throws:
      DataLengthException - if the output buffer is too small.

    • processEncDecByte

      protected int processEncDecByte(byte[] output, int outOff)

    • processBytes

      public int processBytes(byte[] input, int inOff, int len, byte[] output, int outOff) throws DataLengthException
      Description copied from interface: AEADCipher
      process a block of bytes from in putting the result into out.
      Specified by:
      processBytes in interface AEADCipher
      Parameters:
      input - the input byte array.
      inOff - the offset into the in array where the data to be processed starts.
      len - the number of bytes to be processed.
      output - the output buffer the processed bytes go into.
      outOff - the offset into the output byte array the processed data starts at.
      Returns:
      the number of bytes written to out.
      Throws:
      DataLengthException - if the output buffer is too small.

    • processEncDecBytes

      protected int processEncDecBytes(byte[] input, int inOff, int len, byte[] output, int outOff)

    • doFinal

      public int doFinal(byte[] output, int outOff) throws IllegalStateException, InvalidCipherTextException
      Description copied from interface: AEADCipher
      Finish the operation either appending or verifying the MAC at the end of the data.
      Specified by:
      doFinal in interface AEADCipher
      Parameters:
      output - space for any resulting output data.
      outOff - offset into out to start copying the data at.
      Returns:
      number of bytes written into out.
      Throws:
      IllegalStateException - if the cipher is in an inappropriate state.
      InvalidCipherTextException - if the MAC fails to match.

    • getBlockSize

      public final int getBlockSize()

    • getTotalBytesForUpdate

      protected int getTotalBytesForUpdate(int len)

    • getOutputSize

      public int getOutputSize(int len)
      Description copied from interface: AEADCipher
      return the size of the output buffer required for a processBytes plus a doFinal with an input of len bytes.

      The returned size may be dependent on the initialisation of this cipher and may not be accurate once subsequent input data is processed - this method should be invoked immediately prior to a call to final processing of input data and a call to AEADCipher.doFinal(byte[], int).

      Specified by:
      getOutputSize in interface AEADCipher
      Parameters:
      len - the length of the input.
      Returns:
      the space required to accommodate a call to processBytes and doFinal with len bytes of input.

    • checkAAD

      protected void checkAAD()

    • checkData

      protected boolean checkData(boolean isDoFinal)

    • ensureSufficientOutputBuffer

      protected final void ensureSufficientOutputBuffer(byte[] output, int outOff, int len)

    • ensureSufficientInputBuffer

      protected final void ensureSufficientInputBuffer(byte[] input, int inOff, int len)

    • ensureInitialized

      protected final void ensureInitialized()

    • finishAAD1

      protected void finishAAD1(org.bouncycastle.crypto.engines.AEADBaseEngine.State nextState)

    • finishAAD2

      protected void finishAAD2(org.bouncycastle.crypto.engines.AEADBaseEngine.State nextState)

    • finishAAD3

      protected void finishAAD3(org.bouncycastle.crypto.engines.AEADBaseEngine.State nextState, boolean isDoFinal)