java - Java セキュリティ - RSA 公開鍵と秘密鍵コードの問題

Question

これが私のエラーです

java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big.
    at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(Unknown Source)
    at java.security.KeyFactory.generatePublic(Unknown Source)
    at com.sanjaya.rsa.PublicKeyReader.get(PublicKeyReader.java:22)
    at com.sanjaya.rsa.MainKeyClass.main(MainKeyClass.java:8)
Caused by: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big.
    at sun.security.x509.X509Key.decode(Unknown Source)
    at sun.security.x509.X509Key.decode(Unknown Source)
    at sun.security.rsa.RSAPublicKeyImpl.<init>(Unknown Source)
    at sun.security.rsa.RSAKeyFactory.generatePublic(Unknown Source)
    ... 4 more

ここに私のコードがあります -メインクラス

public static void main(String[] args) {
    PublicKeyReader publicKeyReader=new PublicKeyReader();
    try {
        publicKeyReader.get("c:\\public.key");
    } catch (Exception e) {
        e.printStackTrace();
    }

    PrivateKeyReader privateKeyReader=new PrivateKeyReader();
    try {
        privateKeyReader.get("c:\\private.key");
    } catch (Exception e) {
        e.printStackTrace();
    }

公開鍵関連のメソッドはこちら

  public static PublicKey get(String filename) throws Exception {
    File f = new File(filename);
    FileInputStream fis = new FileInputStream(f);
    DataInputStream dis = new DataInputStream(fis);
    byte[] keyBytes = new byte[(int)f.length()];
    dis.readFully(keyBytes);
    dis.close();
    X509EncodedKeySpec spec =new X509EncodedKeySpec(keyBytes);
    KeyFactory kf = KeyFactory.getInstance("RSA");
    return kf.generatePublic(spec);
  }

秘密鍵関連の方法はこちら

  public static PrivateKey get(String filename)throws Exception {
    File f = new File(filename);
    FileInputStream fis = new FileInputStream(f);
    DataInputStream dis = new DataInputStream(fis);
    byte[] keyBytes = new byte[(int)f.length()];
    dis.readFully(keyBytes);
    dis.close();
    PKCS8EncodedKeySpec spec =new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory kf = KeyFactory.getInstance("RSA");
    return kf.generatePrivate(spec);
  }

この問題を解決するのを手伝ってください

公開鍵と秘密鍵を作成し、RSA暗号化されたものから文字列を暗号化、復号化する必要があります