Package org.bouncycastle.crypto.engines

Class IESEngine

  • Direct Known Subclasses:
    OldIESEngine
    public class IESEngine
extends java.lang.Object
    Support class for constructing integrated encryption ciphers for doing basic message exchanges on top of key agreement ciphers. Follows the description given in IEEE Std 1363a.

    • Constructor Detail

      • IESEngine

        public IESEngine​(BasicAgreement agree,
                 DerivationFunction kdf,
                 Mac mac)
        Set up for use with stream mode, where the key derivation function is used to provide a stream of bytes to xor with the message.
        Parameters:
        agree - the key agreement used as the basis for the encryption
        kdf - the key derivation function used for byte generation
        mac - the message authentication code generator for the message

      • IESEngine

        public IESEngine​(BasicAgreement agree,
                 DerivationFunction kdf,
                 Mac mac,
                 BufferedBlockCipher cipher)
        Set up for use in conjunction with a block cipher to handle the message. It is strongly recommended that the cipher is not in ECB mode.
        Parameters:
        agree - the key agreement used as the basis for the encryption
        kdf - the key derivation function used for byte generation
        mac - the message authentication code generator for the message
        cipher - the cipher to used for encrypting the message

    • Method Detail

      • init

        public void init​(boolean forEncryption,
                 CipherParameters privParam,
                 CipherParameters pubParam,
                 CipherParameters params)
        Initialise the encryptor.
        Parameters:
        forEncryption - whether or not this is encryption/decryption.
        privParam - our private key parameters
        pubParam - the recipient's/sender's public key parameters
        params - encoding and derivation parameters, may be wrapped to include an IV for an underlying block cipher.

      • init

        public void init​(AsymmetricKeyParameter publicKey,
                 CipherParameters params,
                 EphemeralKeyPairGenerator ephemeralKeyPairGenerator)
        Initialise the decryptor.
        Parameters:
        publicKey - the recipient's/sender's public key parameters
        params - encoding and derivation parameters, may be wrapped to include an IV for an underlying block cipher.
        ephemeralKeyPairGenerator - the ephemeral key pair generator to use.

      • init

        public void init​(AsymmetricKeyParameter privateKey,
                 CipherParameters params,
                 KeyParser publicKeyParser)
        Initialise the encryptor.
        Parameters:
        privateKey - the recipient's private key.
        params - encoding and derivation parameters, may be wrapped to include an IV for an underlying block cipher.
        publicKeyParser - the parser for reading the ephemeral public key.

      • getMac

        public Mac getMac()

      • getLengthTag

        protected byte[] getLengthTag​(byte[] p2)