RSA对称加密报错原因

最新推荐文章于 2024-03-05 16:38:28 发布

nomoney_boy

最新推荐文章于 2024-03-05 16:38:28 发布

阅读量369

点赞数

文章标签： SUN Security Java 算法 thread

Exception in thread "main" javax.crypto.BadPaddingException: Data must start with zero
    at sun.security.rsa.RSAPadding.unpadV15(Unknown Source)
    at sun.security.rsa.RSAPadding.unpad(Unknown Source)
    at com.sun.crypto.provider.RSACipher.a(DashoA12275)
    at com.sun.crypto.provider.RSACipher.engineDoFinal(DashoA12275)
    at javax.crypto.Cipher.doFinal(DashoA12275)
    at CipherTest.rsaEncrypt(CipherTest.java:33)
    at CipherTest.main(CipherTest.java:40)

RSA是一种对称加密算法,但加密时出现这个错误的原因,是因为使用了私钥进行加密.

正常应该使用公钥进行加密,然后通过私钥进行解密.

代码:

KeyPair keypair = KeyPairGenerator.getInstance("RSA").generateKeyPair();
        String str = "hello world";
        Cipher cipher = Cipher.getInstance("RSA");

        cipher.init(Cipher.PUBLIC_KEY, keypair.getPublic());
        byte[] buffer = cipher.doFinal(str.getBytes());

        cipher.init(Cipher.PRIVATE_KEY, keypair.getPrivate());
        System.out.println(new String(cipher.doFinal(buffer)));