McEliece (Bouncy Castle) 找回 public 钥匙

Question

我目前正在尝试使用 BC 实施 McEliece 加密，但运行遇到了一些麻烦。我目前有能力创建密钥并将它们放入文件中，我可以将它们读回到程序中，但无法让它从字节返回到 Public 密钥。

以下是我目前拥有的：

        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;
}\

我在使用此代码时遇到的当前错误是 KeyFactory 并且 "McEliece" 不被视为一种算法，因为我得到了 NoSuchAlgorithmException，但我不确定目前还可以尝试什么。我还尝试使用 BouncyCastle 中包含的 KeyFactory for McEliece，但没有成功，因为这些方法要么受到保护，要么不允许 KeySpec 和想要的 SubjectPublicKeyInfo，我无法弄清楚如何更改KeySpec into 或 Byte array into.

抱歉，如果这是一个简单的问题，我对编码密码学还很陌生。

提前感谢您的回复。

Answer 1

设法找出问题所在。我需要添加：

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

McEliece (Bouncy Castle) 找回 public 钥匙

McEliece (Bouncy Castle) Getting the public key back

java

security

cryptography

bouncycastle

public-key-encryption