Package org.bouncycastle.pqc.crypto.mceliece

Class McEliecePointchevalCipher

  • All Implemented Interfaces:
    MessageEncryptor
    public class McEliecePointchevalCipher
extends java.lang.Object
implements MessageEncryptor
    This class implements the Pointcheval conversion of the McEliecePKCS. Pointcheval presents a generic technique to make a CCA2-secure cryptosystem from any partially trapdoor one-way function in the random oracle model. For details, see D. Engelbert, R. Overbeck, A. Schmidt, "A summary of the development of the McEliece Cryptosystem", technical report.

    • Field Detail

      • OID

        public static final java.lang.String OID
        The OID of the algorithm.
        See Also:
        Constant Field Values

    • Constructor Detail

      • McEliecePointchevalCipher

        public McEliecePointchevalCipher()

    • Method Detail

      • init

        public void init​(boolean forEncryption,
                 CipherParameters param)
        Specified by:
        init in interface MessageEncryptor
        Parameters:
        forEncryption - true if we are encrypting a signature, false otherwise.
        param - key parameters for encryption or decryption.

      • getKeySize

        public int getKeySize​(McElieceCCA2KeyParameters key)
               throws java.lang.IllegalArgumentException
        Return the key size of the given key object.
        Parameters:
        key - the McElieceCCA2KeyParameters object
        Returns:
        the key size of the given key object
        Throws:
        java.lang.IllegalArgumentException - if the key is invalid

      • decryptOutputSize

        protected int decryptOutputSize​(int inLen)

      • encryptOutputSize

        protected int encryptOutputSize​(int inLen)

      • messageEncrypt

        public byte[] messageEncrypt​(byte[] input)
        Specified by:
        messageEncrypt in interface MessageEncryptor
        Parameters:
        input - the message to be signed.