Java-使用现有的PublicKey.sql加密字符串

Question

I don't want to generate a new public key , someone send me his public key (type PublicKey.sql ) then I'll encrypt some text with this key and save it in a Oracle DataBase .

I found a method to read public key but I'm getting this Exception :

java.io.StreamCorruptedException: invalid stream header: 33303832
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at ge.georgiancard.app.main.App.readKeyFromFile(App.java:36)
at ge.georgiancard.app.main.App.rsaEncrypt(App.java:67)

Method to read key :

public static Key readKeyFromFile() throws IOException {
    InputStream in = new FileInputStream(PUBLIC_KEY_FILE);
    ObjectInputStream oin = new ObjectInputStream(new BufferedInputStream(in));
    try {
        BigInteger m = (BigInteger) oin.readObject();
        BigInteger e = (BigInteger) oin.readObject();
        KeyFactory fact = KeyFactory.getInstance("RSA");
        return fact.generatePublic(new RSAPublicKeySpec(m, e));
    } catch (Exception e) {
        throw new RuntimeException("Spurious serialisation error", e);
    } finally {
        oin.close();
        System.out.println("Closed reading file.");
    }
}

Answer 1

it happens when there is a difference in reading and writing data using streams.It seems key has been written other than ObjectOutputStream.

See This

java.io.StreamCorruptedException: invalid stream header: 54657374