McEliece (Bouncy Castle)取回公钥

Question

我目前正在尝试使用BC实现McEliece加密，但遇到了一些麻烦。我目前有能力创建密钥并将其放入文件中，我可以将它们读回程序中，但无法将其从字节返回到公钥。

下面是我目前所拥有的：

        public static String EncryptText(Component tmp, String Plaintext) throws InvalidKeyException, InvalidCipherTextException {
    String CipherText = "Didnt Work";
    try {
        // The message to encrypt.
        byte[] messageBytes = Plaintext.getBytes();

        //read in the Public Key to use to Encrypt.
        File f = new File(tmp.getPublicKey());
        FileInputStream fis = new FileInputStream(f);
        byte[] PubKeybytes = new byte[fis.available()];
        fis.read(PubKeybytes);
        fis.close();


        //turn the bytes into the Key.
        X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(PubKeybytes);
        SubjectPublicKeyInfo PKI ;
        KeyFactory KF = null;
        try {
          KF =  KeyFactory.getInstance("McEliece");
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(McEliecePKCS.class.getName()).log(Level.SEVERE, null, ex);
        }
        PublicKey PK = null;
        try {
            PK = KF.generatePublic(pubKeySpec);
        } catch (InvalidKeySpecException ex) {
            Logger.getLogger(McEliecePKCS.class.getName()).log(Level.SEVERE, null, ex);
        }

        //Public Key
        PublicKey aPublic = PK;
        McEliecePublicKeyParameters GPKP = (McEliecePublicKeyParameters) McElieceKeysToParams.generatePublicKeyParameter(aPublic);

        //set the public key to use.
        McElieceCipher EnCipheredText = new McElieceCipher();
        EnCipheredText.init(true, GPKP);
        EnCipheredText.initCipherEncrypt(GPKP);

        byte[] ciphertextBytes;

        //sign the message with the public key.
        ciphertextBytes = EnCipheredText.messageEncrypt(messageBytes);
        CipherText = new String(ciphertextBytes);
        return CipherText;
    } catch (IOException ex) {
        Logger.getLogger(McEliecePKCS.class.getName()).log(Level.SEVERE, null, ex);
    }
    return CipherText;
}\

这段代码的当前错误是KeyFactory，"McEliece“不被认为是一个算法，因为我得到了NoSuchAlgorithmException，但我不确定现在还能尝试什么。我还尝试使用BouncyCastle附带的McEliece的KeyFactory，但没有成功，因为这些方法要么是受保护的，要么不支持KeySpec和SubjectPublicKeyInfo，我不知道如何将KeySpec或字节数组更改为它。

抱歉，如果这是一个简单的问题，我对编码密码学相当陌生。

感谢您的提前回复。

Answer 1

设法找出问题所在。我需要补充的是：

           Security.addProvider(new BouncyCastleProvider());
           Security.addProvider(new BouncyCastlePQCProvider());