java - 查找 RSA 参数

Question

我想在我用于 Android 项目演示的代码中找到 c、d、p 和 q 参数。

https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Key_distribution

这是我的代码

public class RSA {
    private final static String RSA = "RSA";

    public static PublicKey puk;
    public static PrivateKey prk;


    public static void generateKey() throws Exception {
        KeyPairGenerator gen = KeyPairGenerator.getInstance(RSA);
        gen.initialize(512, new SecureRandom());
        KeyPair keyPair = gen.generateKeyPair();
        puk = keyPair.getPublic();
        prk = keyPair.getPrivate();

    }
}

请问如何从这段代码中获取这些值？

Answer 1

我不记得确切的映射，但如果您将公钥和私钥转换为其 RSA 特定类型，则可以访问所有值:

    RSAPublicKey puk = (RSAPublicKey) keyPair.getPublic();
    RSAPrivateCrtKey prk = (RSAPrivateCrtKey) keyPair.getPrivate();
    System.out.println("p: " + prk.getPrimeP());
    System.out.println("q: " + prk.getPrimeQ());
    ...

参见RSAPublicKey和 RSAPrivateCrtKey