Package org.bouncycastle.tls.crypto.impl.jcajce

Class JceAEADCipherImpl

java.lang.Object
org.bouncycastle.tls.crypto.impl.jcajce.JceAEADCipherImpl
All Implemented Interfaces:
TlsAEADCipherImpl
public class JceAEADCipherImpl extends Object implements TlsAEADCipherImpl
A basic wrapper for a JCE Cipher class to provide the needed AEAD cipher functionality for TLS.

  • Constructor Summary

    Constructors
    Constructor
    Description
    JceAEADCipherImpl(JcaTlsCrypto crypto, org.bouncycastle.jcajce.util.JcaJceHelper helper, String cipherName, String algorithm, int keySize, boolean isEncrypting)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    doFinal(byte[] additionalData, byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
    Perform the cipher encryption/decryption returning the output in output.
    int
    getOutputSize(int inputLength)
    Return the maximum size of the output for input of inputLength bytes.
    void
    init(byte[] nonce, int macSize)
    Initialise the parameters for the AEAD operator.
    void
    setKey(byte[] key, int keyOff, int keyLen)
    Set the key to be used by the AEAD cipher implementation supporting this service.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

  • Method Details

    • setKey

      public void setKey(byte[] key, int keyOff, int keyLen)
      Description copied from interface: TlsAEADCipherImpl
      Set the key to be used by the AEAD cipher implementation supporting this service.
      Specified by:
      setKey in interface TlsAEADCipherImpl
      Parameters:
      key - array holding the AEAD cipher key.
      keyOff - offset into the array the key starts at.
      keyLen - length of the key in the array.

    • init

      public void init(byte[] nonce, int macSize)
      Description copied from interface: TlsAEADCipherImpl
      Initialise the parameters for the AEAD operator.
      Specified by:
      init in interface TlsAEADCipherImpl
      Parameters:
      nonce - the nonce.
      macSize - MAC size in bytes.

    • getOutputSize

      public int getOutputSize(int inputLength)
      Description copied from interface: TlsAEADCipherImpl
      Return the maximum size of the output for input of inputLength bytes.
      Specified by:
      getOutputSize in interface TlsAEADCipherImpl
      Parameters:
      inputLength - the length (in bytes) of the proposed input.
      Returns:
      the maximum size of the output.

    • doFinal

      public int doFinal(byte[] additionalData, byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset) throws IOException
      Description copied from interface: TlsAEADCipherImpl
      Perform the cipher encryption/decryption returning the output in output.

      Note: we have to use doFinal() here as it is the only way to guarantee output from the underlying cipher.

      Specified by:
      doFinal in interface TlsAEADCipherImpl
      Parameters:
      additionalData - any additional data to be included in the MAC calculation.
      input - array holding input data to the cipher.
      inputOffset - offset into input array data starts at.
      inputLength - length of the input data in the array.
      output - array to hold the cipher output.
      outputOffset - offset into output array to start saving output.
      Returns:
      the amount of data written to output.
      Throws:
      IOException - in case of failure.